:root {
    /* semantic brand/state colors */
    --brand-500: #22c55e;
    --brand-600: #16a34a;
    --info-500: #0ea5e9;
    --info-600: #0284c7;
    --warn-500: #f59e0b;
    --warn-600: #d97706;
    --danger-500: #ef4444;
    --danger-600: #dc2626;
    --gold-500: #facc15;
    --gold-600: #eab308;
    /* light theme neutrals */
    --color-bg: #f6f7f9;
    --color-card-bg: #fff;
    --color-text: #111827;
    --color-text-light: #4b5563;
    --color-border: #e5e7eb;
    --color-shadow: rgba(17, 24, 39, 0.08);
    --color-highlight: rgba(34, 197, 94, 0.1);
    /* semantic mappings */
    --color-primary: var(--brand-500);
    --color-primary-dark: var(--brand-600);
    --color-secondary: var(--info-500);
    --color-secondary-dark: var(--info-600);
    --color-warning: var(--warn-500);
    --color-warning-dark: var(--warn-600);
    --color-danger: var(--danger-500);
    --color-danger-dark: var(--danger-600);
    --color-gold: var(--gold-500);
    --color-gold-dark: var(--gold-600);

    /* --- UNIFIED TYPOGRAPHY --- */
    --font-family-sans: "Inter", "Roboto", system-ui, -apple-system, sans-serif;
    --font-family-serif: "Merriweather", serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.25rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 1.8rem;
    --line-height-base: 1.6;
    /* chips */
    --chip-font: 0.78rem;

    /* UI tokens */
    --ink-on-solid: rgba(255, 255, 255, 0.92);
    --icon-bg: rgba(0, 0, 0, 0.04);
    --icon-hover-bg: rgba(0, 0, 0, 0.08);
    --icon-hover-bg-bright: rgba(0, 0, 0, 0.06);
    --hover-raise-surface: rgba(0, 0, 0, 0.04);
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-width: 1px;
    --shadow-sm: 0 2px 4px var(--color-shadow);
    --shadow-md: 0 4px 12px var(--color-shadow);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.15);
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.2s ease-in-out;
    --transition-slow: 0.3s ease-in-out;
    /* chips */
    --chip-pad-y: 0.2rem;
    --chip-pad-x: 0.5rem;
    /* scrollbars */
    --scrollbar-thumb: rgba(0, 0, 0, 0.18);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.28);
    --scrollbar-track: transparent;
    /* unified corners */
    --topic-radius: 12px;
}

/* === DARK THEME === */
html[data-theme="dark"] {
    --color-bg: #1b1f24;
    --color-card-bg: #1f2329;
    --color-text: #e7eaf0;
    --color-text-light: #9aa4b2;
    --color-border: #2b3340;
    --color-shadow: rgba(0, 0, 0, 0.35);
    --color-highlight: rgba(34, 197, 94, 0.16);
    --icon-bg: rgba(255, 255, 255, 0.06);
    --icon-hover-bg: rgba(0, 0, 0, 0.28);
    --icon-hover-bg-bright: rgba(255, 255, 255, 0.1);
    --hover-raise-surface: rgba(255, 255, 255, 0.06);
    --scrollbar-thumb: rgba(255, 255, 255, 0.22);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.36);
}

/* === EDITORIAL THEME === */
html[data-theme="editorial"] {
    /* --- Core Palette --- */
    --brand-ochre: #b18442;
    --brand-ochre-dark: #8c6833;
    --accent-terracotta: #c97f63;
    --accent-sand: #d1aa7a;
    --accent-sage-green: #798478;
    --accent-slate-blue: #6a7a8c;
    --accent-destructive-muted: #9d6b53;
    /* --- Remap Primary Color --- */
    --color-primary: var(--brand-ochre);
    --color-primary-dark: var(--brand-ochre-dark);
    /* --- Base Colors & Surfaces --- */
    --color-bg: #f4f1ed;
    --color-card-bg: #fbfaf8;
    --color-text: #3d352e;
    --color-text-light: #8a817a;
    --color-border: #e0ddd9;
    --color-shadow: rgba(100, 80, 60, 0.1);
    --color-highlight: rgba(177, 132, 66, 0.15);
    --hover-raise-surface: rgba(90, 80, 70, 0.06);
    --icon-hover-bg-bright: rgba(90, 80, 70, 0.09);

    /* --- Surfaces & Borders --- */
    .app-sidebar {
        border-right-color: var(--color-border);
    }

    .app-header {
        border-bottom-color: var(--color-border);
    }

    .flashcard-face {
        border: 1px solid var(--color-border);
        box-shadow: 0 5px 20px var(--color-shadow);
    }

    .progress-bar {
        background: linear-gradient(90deg, var(--accent-sand) 0%, var(--brand-ochre) 100%);
    }

    /* --- Sidebar & Topic List --- */
    .topic-row.active {
        background: var(--color-highlight);
        border-left: 3px solid var(--color-primary);
        border-color: var(--color-primary);
        color: var(--color-primary-dark);
    }

        .topic-row.active .topic-name {
            color: var(--color-primary-dark) !important;
            font-weight: 600;
        }

    .theme-btn.active, .mode-btn.active, .answer-btn.active {
        background-color: var(--color-primary);
        border-color: var(--color-primary-dark);
        color: #fbfaf8;
    }

    .theme-btn:not(.active):hover,
    .mode-btn:not(.active):hover,
    .answer-btn:not(.active):hover {
        background-color: var(--icon-hover-bg-bright);
        border-color: #d1cdc7;
    }

    /* --- Review Buttons --- */
    .review-actions .btn {
        border-width: 1px;
        color: #fbfaf8;
        transition: filter 0.2s ease;
        box-shadow: 0 2px 5px var(--color-shadow);
    }

    .review-actions .btn-success {
        background-color: var(--accent-sage-green);
        border-color: var(--accent-sage-green);
    }

    .review-actions .btn-warning {
        background-color: var(--accent-sand);
        border-color: var(--accent-sand);
    }

    .review-actions .btn-danger {
        background-color: var(--accent-terracotta);
        border-color: var(--accent-terracotta);
    }

    .review-actions .btn:hover {
        filter: brightness(1.1);
    }

    /* --- Manage Cards Header Buttons --- */
    #manageBtn {
        color: var(--accent-slate-blue);
        border-color: var(--accent-slate-blue);
        transition: background-color 0.2s ease, color 0.2s ease;
    }

        #manageBtn:hover {
            background-color: color-mix(in srgb, var(--accent-slate-blue) 10%, var(--color-bg));
            color: var(--accent-slate-blue);
        }

    .deck-manager-actions .btn-outline-success {
        border-color: var(--accent-sage-green);
        color: var(--accent-sage-green);
    }

        .deck-manager-actions .btn-outline-success:hover {
            background-color: color-mix(in srgb, var(--accent-sage-green) 15%, var(--color-bg));
        }

    .deck-manager-actions .btn-outline-danger {
        border-color: var(--accent-terracotta);
        color: var(--accent-terracotta);
    }

        .deck-manager-actions .btn-outline-danger:hover {
            background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
        }

    /* --- Sidebar Icon Hovers --- */
    .edit-topic-btn:hover i, .edit-folder-btn:hover i {
        color: var(--color-text) !important;
    }

    .edit-topic-btn:hover, .edit-folder-btn:hover {
        background-color: var(--hover-raise-surface);
        border-color: var(--color-border);
    }

    .delete-topic-btn:hover i, .delete-folder-btn:hover i {
        color: var(--accent-destructive-muted) !important;
    }

    .delete-topic-btn:hover, .delete-folder-btn:hover {
        background-color: color-mix(in srgb, var(--accent-destructive-muted) 10%, var(--color-bg));
        border-color: var(--accent-destructive-muted);
    }

    /* --- Other Destructive Actions --- */
    .delete-card-btn:hover {
        color: var(--accent-terracotta);
        background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
    }

    .modal__actions #confirmOk.btn-danger {
        background: transparent;
        border: 1px solid var(--accent-terracotta);
        color: var(--accent-terracotta);
    }

        .modal__actions #confirmOk.btn-danger:hover {
            background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
        }

    /* --- Difficulty Circles --- */
    .difficulty-level.easy {
        border-color: var(--accent-sage-green);
    }

    .difficulty-level.medium {
        border-color: var(--accent-sand);
    }

    .difficulty-level.hard {
        border-color: var(--accent-terracotta);
    }

    .difficulty-level:not(.active):hover {
        opacity: 1;
        transform: scale(1.1);
    }

    .difficulty-level.easy:not(.active):hover {
        background-color: color-mix(in srgb, var(--accent-sage-green) 15%, var(--color-bg));
    }

    .difficulty-level.medium:not(.active):hover {
        background-color: color-mix(in srgb, var(--accent-sand) 20%, var(--color-bg));
    }

    .difficulty-level.hard:not(.active):hover {
        background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
    }

    .difficulty-level.active {
        color: #fbfaf8;
        box-shadow: 0 2px 8px var(--color-shadow);
    }

    .difficulty-level.easy.active {
        background-color: var(--accent-sage-green);
    }

    .difficulty-level.medium.active {
        background-color: var(--accent-sand);
    }

    .difficulty-level.hard.active {
        background-color: var(--accent-terracotta);
    }

    /* --- Card Labels (Chips) --- */
    .card-difficulty.easy {
        background-color: color-mix(in srgb, var(--accent-sage-green) 15%, var(--color-bg));
        border-color: color-mix(in srgb, var(--accent-sage-green) 30%, var(--color-border));
        color: var(--accent-sage-green);
    }

    .card-difficulty.medium {
        background-color: color-mix(in srgb, var(--accent-sand) 20%, var(--color-bg));
        border-color: color-mix(in srgb, var(--accent-sand) 40%, var(--color-border));
        color: var(--accent-sand);
    }

    .card-difficulty.hard {
        background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
        border-color: color-mix(in srgb, var(--accent-terracotta) 30%, var(--color-border));
        color: var(--accent-terracotta);
    }

    .card-topic {
        background-color: color-mix(in srgb, var(--brand-ochre) 15%, var(--color-bg));
        border-color: color-mix(in srgb, var(--brand-ochre) 30%, var(--color-border));
        color: var(--brand-ochre-dark);
    }

    /* --- Completion Overlay --- */
    .completion-box {
        border-color: var(--color-border);
    }

    .completion-subtitle {
        color: var(--color-text-light);
    }

    .stat-value {
        font-family: var(--font-family-sans);
        color: var(--color-text);
    }

    .stat-label {
        color: var(--color-text-light);
    }

    #closeCompletionBtn {
        background-color: transparent;
        border: 1px solid var(--brand-ochre);
        color: var(--brand-ochre-dark);
    }

        #closeCompletionBtn:hover {
            background-color: var(--color-highlight);
            box-shadow: 0 2px 8px var(--color-shadow);
        }

    /* --- Answer Feedback --- */
    .mc-option.correct {
        background-color: color-mix(in srgb, var(--accent-sage-green) 20%, var(--color-bg));
        border-color: var(--accent-sage-green);
        color: var(--accent-sage-green);
    }

    .mc-option.incorrect {
        background-color: color-mix(in srgb, var(--accent-terracotta) 15%, var(--color-bg));
        border-color: var(--accent-terracotta);
        color: var(--accent-terracotta);
    }

    .type-answer-input.correct {
        border-color: var(--accent-sage-green);
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-sage-green) 20%, transparent);
        background-color: color-mix(in srgb, var(--accent-sage-green) 25%, var(--color-bg));
        color: #3d352e;
    }

    .type-answer-input.incorrect {
        border-color: var(--accent-terracotta);
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-terracotta) 20%, transparent);
        background-color: color-mix(in srgb, var(--accent-terracotta) 25%, var(--color-bg));
        color: #3d352e;
    }
}
/* RESET */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}


html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: var(--line-height-base);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--space-lg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === TYPOGRAPHIC HIERARCHY === */
.sidebar-title, .deck-manager-title, .completion-title, .flashcard-content {
    font-family: var(--font-family-serif);
    font-weight: 700;
}

.flashcard-content {
    font-size: 1.6rem;
}

.folder-name {
    font-size: 1rem;
    letter-spacing: 0.2px;
}

.topic-row .topic-name {
    font-weight: 500;
    font-size: 0.9rem;
}

.control-group-title, .topics-title {
    font-weight: 600;
    color: var(--color-text);
    opacity: 0.8;
    letter-spacing: 0.5px;
}
.btn {
    font-weight: 500;
}
.card-difficulty, .card-topic {
    font-weight: 500;
}

/* LAYOUT */
.app-container {
    position: relative;
    display: grid;
    grid-template-columns: minmax(300px, 350px) 1fr;
    gap: var(--space-xl);
    width: 100%;
    max-width: 1400px;
    background: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    height: 80vh;
}

.app-sidebar {
    background: var(--color-card-bg);
    padding: var(--space-xl);
    border-right: var(--border-width) solid var(--color-border);
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-slow), border-color var(--transition-slow);
    overflow-y: auto;
    scrollbar-gutter: stable;
}

.sidebar-header {
    margin-bottom: var(--space-lg);
}

.sidebar-title {
    font-size: var(--font-size-lg);
    color: var(--color-primary-dark);
    text-align: center;
}

.sidebar-title-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    text-align: center;
}

.sidebar-controls {
    margin-bottom: 0;
}

.control-group {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: var(--border-width) solid var(--color-border);
}

.sidebar-controls .control-group:last-of-type {
    margin-bottom: var(--space-sm);
}

.control-group-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}
/* pill groups */
.theme-controls, .study-modes, .answer-types {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.theme-btn, .mode-btn, .answer-btn {
    padding: var(--space-xs) var(--space-sm);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    flex: 1;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
}

    .theme-btn:not(.active):hover,
    .mode-btn:not(.active):hover,
    .answer-btn:not(.active):hover {
        background: var(--hover-raise-surface);
    }

    .theme-btn.active,
    .mode-btn.active,
    .answer-btn.active {
        color: #111827;
        background: var(--color-primary);
        border-color: var(--color-primary-dark);
    }

        .theme-btn.active:hover,
        .mode-btn.active:hover,
        .answer-btn.active:hover {
            background: var(--color-primary-dark);
        }

    .theme-btn i, .mode-btn i, .answer-btn i {
        color: inherit;
    }

/* === MODERN SCROLLBARS === */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
}
::-webkit-scrollbar-button {
    height: 0px !important;
    width: 0px !important;
}
    ::-webkit-scrollbar-button:vertical:start:decrement,
    ::-webkit-scrollbar-button:vertical:end:increment,
    ::-webkit-scrollbar-button:horizontal:start:decrement,
    ::-webkit-scrollbar-button:horizontal:end:increment {
        height: 0px !important;
        width: 0px !important;
        background: transparent !important;
    }
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}
    ::-webkit-scrollbar-thumb:hover {
        background-color: var(--scrollbar-thumb-hover);
    }
::-webkit-scrollbar-corner {
    background: transparent;
}
.app-sidebar,
.deck-manager-content,
.topics-scroll-container,
.flashcard-face {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-gutter: stable;
}
.deck-manager-content {
    scrollbar-gutter: stable both-edges;
}
.topics-scroll-container {
    padding: 0 4px;
}

/* MAIN COLUMN */
.app-main {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    position: relative;
}

.app-main-footer {
    position: absolute;
    bottom: 0;
    right: 0;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    color: var(--color-text-light);
    opacity: 0.5;
    transition: opacity 0.2s ease-in-out;
    z-index: 1;
}
    .app-main-footer:hover {
        opacity: 1;
    }
    .app-main-footer a {
        color: inherit;
        text-decoration: none;
        font-weight: 500;
        transition: color 0.2s ease-in-out;
    }
        .app-main-footer a:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }

.app-main > .review-mode-container,
.app-main > .deck-manager-panel {
    width: 100%;
}

.review-mode-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}
.review-mode-container.hidden,
.deck-manager-panel.hidden {
    transition: none;
}

/* === YOUR TOPICS SECTION === */
.topics-container {
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    margin-top: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: 0;
    min-height: 0;
}
    .topics-container.collapsed .topics-scroll-container,
    .topics-container.collapsed #addTopicPlaceholder,
    .topics-container.collapsed #addFolderPlaceholder {
        display: none !important;
    }
    .topics-container.collapsed .topics-title-row {
        margin-bottom: 0;
    }
    .topics-container.collapsed #toggleTopicsBtn i {
        transform: rotate(180deg);
        transition: transform var(--transition-fast);
    }
#toggleTopicsBtn i {
    transition: transform var(--transition-fast);
}

.topics-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    margin: 0 0 var(--space-sm) 0;
    padding: 0 4px;
}

.topics-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    flex-grow: 1;
}

.topics-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.topic-add-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid color-mix(in srgb, var(--color-border) 80%, transparent);
    background: color-mix(in srgb, var(--color-card-bg) 75%, var(--icon-bg));
    color: var(--color-text);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
    .topic-add-btn:hover {
        background: var(--icon-hover-bg-bright);
    }
    .topic-add-btn:active {
        background: var(--color-primary);
        color: var(--ink-on-solid);
        border-color: var(--color-primary);
    }
    .topic-add-btn:focus-visible {
        outline: 3px solid #B4F5C3;
        outline-offset: 2px;
    }

.topic-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
    .topic-list > li {
        margin-right: -10px;
    }
    .topic-list > .folder-item,
    .topic-row {
        border-radius: var(--topic-radius);
        background: color-mix(in srgb, var(--color-card-bg) 72%, var(--icon-bg));
        border: 1px solid color-mix(in srgb, var(--color-border) 85%, transparent);
        box-shadow: inset 1px 0 rgba(255, 255, 255, 0.03);
    }

.folder-item {
    background: transparent !important;
    border: none !important;
    padding: 0;
    box-shadow: none !important;
}

.folder-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
    padding: 8px 12px;
    border-radius: var(--topic-radius);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    margin: 2px 0 6px;
    transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
    .folder-header:hover {
        background: color-mix(in srgb, var(--color-primary) 15%, transparent);
        border-color: var(--color-primary);
        box-shadow: inset 0 0 4px rgba(76, 175, 80, .3);
    }
.folder-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-grow: 1;
    min-width: 0;
}

.topic-row .topic-name {
    flex-grow: 1;
    min-width: 0;
}

.folder-name,
.topic-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
    font-weight: 500;
}
    .folder-name:hover::after,
    .topic-name:hover::after {
        content: attr(title);
        position: absolute;
        bottom: calc(100% + 5px);
        left: 0;
        background-color: var(--color-bg);
        color: var(--color-text);
        border: 1px solid var(--color-border);
        padding: var(--space-xs) var(--space-sm);
        border-radius: var(--border-radius-sm);
        box-shadow: var(--shadow-md);
        font-size: var(--font-size-sm);
        white-space: normal;
        z-index: 10;
        width: max-content;
        max-width: 280px;
        opacity: 1;
        transition: opacity 0.15s ease;
    }

.folder-icon i {
    color: transparent;
    transition: -webkit-text-stroke-color 0.2s ease, text-stroke-color 0.2s ease;
}
    .folder-icon i.fa-folder {
        -webkit-text-stroke: 1.5px var(--color-primary);
        text-stroke: 1.5px var(--color-primary);
    }
    .folder-icon i.fa-folder-open {
        -webkit-text-stroke: 1.8px var(--color-primary);
        text-stroke: 1.8px var(--color-primary);
    }
.folder-header:hover .folder-icon i,
.folder-item:not(.folder-collapsed) .folder-icon i {
    -webkit-text-stroke-color: var(--color-primary-dark);
    text-stroke-color: var(--color-primary-dark);
}

.folder-actions-inline,
.topic-actions-inline {
    display: inline-flex;
    gap: .35rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease;
}

.folder-header:hover .folder-actions-inline,
.topic-row:hover .topic-actions-inline {
    opacity: 1;
    pointer-events: auto;
}

.folder-toggle i {
    transition: transform .2s ease;
}

.folder-contents {
    margin: 0;
    padding: 4px 0 8px 0;
    overflow: hidden;
    max-height: 800px;
    transition: max-height var(--transition-slow), opacity var(--transition-slow);
    opacity: 1;
}

.folder-topic-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 6px 0;
    padding-left: 0 !important;
    border-left: none !important;
}

.topic-row {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: 8px 12px;
    color: var(--color-text);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--topic-radius);
    transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
    .topic-row:hover {
        background: color-mix(in srgb, var(--color-primary) 15%, transparent);
        border-color: var(--color-primary);
        box-shadow: inset 0 0 4px rgba(76,175,80,.3);
        transform: none !important;
    }

.folder-toggle,
.topic-icon-btn {
    background: color-mix(in srgb, var(--color-card-bg) 70%, var(--icon-bg));
    border: 1px solid color-mix(in srgb, var(--color-border) 85%, transparent);
    color: var(--color-text);
    cursor: pointer;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s ease;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    padding: 4px;
    font-size: 0.85rem;
}
    .topic-icon-btn:hover {
        background: inherit;
    }
    .topic-icon-btn:focus-visible {
        outline: 3px solid #B4F5C3;
        outline-offset: 2px;
    }
    .topic-icon-btn.edit-topic-btn:hover i,
    .folder-actions-inline .edit-folder-btn:hover i {
        color: var(--color-primary);
    }
    .topic-icon-btn.delete-topic-btn:hover i,
    .folder-actions-inline .delete-folder-btn:hover i {
        color: var(--color-danger);
    }

.topic-row.active {
    background: color-mix(in srgb, var(--color-primary) 30%, transparent) !important;
    border: 1px solid var(--color-primary) !important;
    color: #fff !important;
    transform: none !important;
}
    .topic-row.active .topic-name,
    .topic-row.active i {
        color: #fff !important;
    }

.folder-item.folder-collapsed .folder-contents,
.folder-item.folder-collapsed .folder-topic-list {
    display: none !important;
    max-height: 0 !important;
    opacity: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
}
.folder-contents .topic-row {
    margin-left: 14px;
}
.folder-contents .folder-item {
    margin-left: 20px;
}

.topics-separator {
    margin: var(--space-md) 0 var(--space-xs);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: .5px;
    list-style: none;
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-xs);
}

/* === Drag & Drop Feedback Styles === */
.folder-item.droppable-ok > .folder-header {
    border-color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 14%, var(--color-card-bg));
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.35);
}
.topic-list.droppable-ok {
    outline: 2px dashed var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 8%, transparent);
    border-radius: var(--border-radius-md);
}
.folder-item.droppable-blocked > .folder-header {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.35);
    filter: grayscale(.05) brightness(.95);
}
.topic-row.dragging, .topic-list li.dragging {
    opacity: .6;
}
.topic-row.reorder-before,
.folder-header.reorder-before {
    box-shadow: inset 0 2px 0 var(--color-primary);
}
.topic-row.reorder-after,
.folder-header.reorder-after {
    box-shadow: inset 0 -2px 0 var(--color-primary);
}

.badge.folder-count, .folder-count {
    display: none !important;
}
/* HEADER in main */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: var(--border-width) solid var(--color-border);
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.current-topic-title {
    font-size: var(--font-size-xl);
    color: var(--color-text);
    font-weight: 600;
    flex-grow: 1;
    min-width: 200px;
}

.header-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* Buttons */
.btn {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: background-color var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}
    .btn:focus-visible,
    .topic-icon-btn:focus-visible,
    .theme-btn:focus-visible,
    .mode-btn:focus-visible,
    .answer-btn:focus-visible,
    .flashcard:focus-visible {
        outline: 3px solid #B4F5C3;
        outline-offset: 2px;
    }

.btn-primary {
    background: var(--color-primary);
    color: #111827;
}
html[data-theme="light"] .btn-primary {
    color: #fff;
}
html[data-theme="editorial"] .btn-primary {
    color: #fbfaf8;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
}

.btn-secondary {
    background: var(--color-secondary);
    color: var(--ink-on-solid);
}
    .btn-secondary:hover {
        background: var(--color-secondary-dark);
    }

.btn-success {
    background: var(--color-primary);
    color: #111827;
}
    .btn-success:hover {
        background: var(--color-primary-dark);
        color: #111827;
    }

.btn-warning {
    background: var(--color-warning);
    color: #111827;
}
    .btn-warning:hover {
        background: var(--color-warning-dark);
        color: #111827;
    }

.btn-danger {
    background: var(--color-danger);
    color: #111827;
}
    .btn-danger:hover {
        background: var(--color-danger-dark);
    }

.btn-outline-danger {
    background: transparent;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}
    .btn-outline-danger:hover {
        background: var(--color-danger);
        color: #fff;
    }

.btn-outline-success {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}
    .btn-outline-success:hover {
        background: var(--color-primary);
        color: #111827;
    }

.btn-outline-secondary {
    background: transparent;
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary);
}
    .btn-outline-secondary:hover {
        background: var(--color-secondary);
        color: #fff;
    }

.btn-text {
    background: none;
    color: var(--color-text);
    border: var(--border-width) solid var(--color-border);
    padding: var(--space-sm) var(--space-lg);
    transition: all var(--transition-slow);
}
    .btn-text:hover {
        background: var(--hover-raise-surface);
    }

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
    .btn-outline:hover {
        background: var(--hover-raise-surface);
    }

/* PROGRESS */
.progress-panel {
    width: 100%;
    max-width: 740px;
    margin: 0 auto var(--space-lg);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 12px 14px;
}

.progress-panel-header, .progress-panel-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.progress-title {
    font-weight: 700;
    font-size: var(--font-size-base);
}

.progress-percent {
    font-weight: 800;
    color: var(--color-primary);
}

.progress-sub {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.progress-panel .progress-container {
    margin: 8px 0;
}

.progress-container {
    width: 100%;
    height: 10px;
    border-radius: 999px;
    background: var(--color-border);
    overflow: hidden;
    position: relative;
    margin: 0;
}

.progress-bar {
    height: 100%;
    width: 0%;
    border-radius: inherit;
    background: linear-gradient(90deg, #34d399 0%, #22c55e 60%, #16a34a 100%);
    transition: width .35s ease;
}
    .progress-bar.no-animate {
        transition: none !important;
    }
    .progress-bar.completed {
        background: linear-gradient(90deg, var(--gold-500) 0%, var(--gold-600) 100%);
    }

.progress-milestones, .xp-display, .xp-indicator {
    display: none !important;
}

.xp-popup {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--color-primary);
    color: var(--ink-on-solid);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius-sm);
    font-weight: bold;
    z-index: 3000;
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity .5s ease, transform .5s ease;
}
    .xp-popup.show {
        opacity: 1;
        transform: translateY(0);
    }

/* FLASHCARD VIEWER */
.flashcard-viewer {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.flashcard {
    width: 100%;
    max-width: 600px;
    height: 300px;
    perspective: 1500px;
    margin-bottom: var(--space-xl);
    cursor: pointer;
    position: relative;
}

.flashcard-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform .6s cubic-bezier(.34,1.56,.64,1);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-inner.instant {
    transition: none !important;
    transform: none !important;
}

.flashcard-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
    border-radius: var(--border-radius-md);
    background: var(--color-card-bg);
    color: var(--color-text);
    border: var(--border-width) solid var(--color-border);
    text-align: center;
    white-space: pre-wrap;
    overflow: hidden; /* This correctly removes the scrollbar */
    transition: all var(--transition-slow);
}

.flashcard-front {
    color: var(--color-text);
    font-weight: 700;
}

.flashcard-back {
    transform: rotateY(180deg);
    color: var(--color-text);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    font-size: var(--font-size-sm);
    gap: var(--space-sm);
}

.card-difficulty, .card-topic {
    padding: var(--chip-pad-y) var(--chip-pad-x);
    border-radius: 999px;
    font-weight: 600;
    font-size: var(--chip-font);
    border: 1px solid transparent;
}
    .card-difficulty.easy {
        background: var(--color-primary);
        color: #111827;
    }
    .card-difficulty.medium {
        background: var(--color-warning);
        color: #111827;
    }
    .card-difficulty.hard {
        background: var(--color-danger);
        color: #111827;
    }
.card-topic {
    background: var(--color-secondary);
    color: #111827;
}

.flashcard-content {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl); /* Reverted to original max size */
    padding: var(--space-md);
    overflow-wrap: break-word; /* Keep this */
    overflow: hidden; /* Keep this */
    line-height: 1.4; /* Keep this */
}

/* REVIEW actions */
.review-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}
    .review-actions .btn {
        min-width: 80px;
    }
    .review-actions[aria-hidden="true"] {
        visibility: hidden;
        pointer-events: none;
        opacity: 0;
    }
    .review-actions[aria-hidden="false"] {
        visibility: visible;
        opacity: 1;
        transition: opacity .2s;
    }

/* Cute wiggles for small icon buttons */
.topic-icon-btn i, .card-action-btn i {
    display: inline-block;
    will-change: transform;
}
.topic-icon-btn, .card-action-btn {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
    .topic-icon-btn:hover, .card-action-btn:hover {
        transform: translateY(-1px) scale(1.06);
        box-shadow: var(--shadow-sm);
    }
    .topic-icon-btn:active, .card-action-btn:active {
        transform: translateY(0) scale(.98);
        box-shadow: none;
    }

@keyframes pencil-tilt {
    0% { transform: rotate(0) }
    30% { transform: rotate(-12deg) }
    60% { transform: rotate(8deg) }
    100% { transform: rotate(0) }
}
@keyframes trash-wiggle {
    0% { transform: rotate(0) }
    25% { transform: rotate(-10deg) }
    50% { transform: rotate(10deg) }
    75% { transform: rotate(-6deg) }
    100% { transform: rotate(0) }
}

.topic-icon-btn:hover .fa-edit,
.card-action-btn:hover .fa-edit,
.topic-icon-btn:hover .fa-pen,
.card-action-btn:hover .fa-pen,
.topic-icon-btn:hover .fa-pen-to-square,
.card-action-btn:hover .fa-pen-to-square {
    animation: pencil-tilt 300ms ease;
}

.topic-icon-btn:hover .fa-trash,
.card-action-btn:hover .fa-trash,
.topic-icon-btn:hover .fa-trash-alt,
.card-action-btn:hover .fa-trash-alt,
.delete-card-btn:hover i {
    animation: trash-wiggle 280ms ease;
}

/* DECK MANAGER PANEL */
.deck-manager-panel {
    background: transparent;
    border: none;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    min-height: 0;
    flex-grow: 1;
}
    .deck-manager-panel.hidden {
        display: none !important;
    }

.deck-manager-header {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-card-bg);
    color: var(--color-text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-sm);
}

.deck-manager-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.deck-manager-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.deck-manager-content {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 0;
}

/* Manager search */
.search-container {
    background: var(--color-card-bg);
    margin: var(--space-xs) 0 var(--space-xs);
    padding: 0 0 var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.search-field {
    position: relative;
}
    .search-field i {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-text-light);
        opacity: .9;
        pointer-events: none;
    }
.search-input {
    width: 100%;
    height: 40px;
    padding: 0 12px 0 40px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-bg);
    color: var(--color-text);
    caret-color: var(--color-primary);
    transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
    .search-input:hover {
        background: var(--hover-raise-surface);
    }
    .search-input:focus {
        outline: none;
        background: var(--color-card-bg);
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-highlight);
    }
    .search-input::placeholder {
        color: var(--color-text-light);
        opacity: .85;
    }
    .search-input::-webkit-search-decoration,
    .search-input::-webkit-search-results-button,
    .search-input::-webkit-search-results-decoration {
        display: none;
    }
    .search-input::-webkit-search-cancel-button {
        -webkit-appearance: none;
        height: 14px;
        width: 14px;
        margin-right: 6px;
    }

/* Cards list */
.cards-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    counter-reset: card var(--card-counter-start, 0);
}

.card-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    border: var(--border-width) solid var(--color-border);
    /* MODIFIED: Animate all properties that change on hover for a smooth effect */
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    padding-left: calc(var(--space-md) + 28px);
    /* NEW: Add placeholders to prevent layout shift */
    transform: translateY(0);
    box-shadow: 0 0 0 transparent;
}
    .card-item:hover {
        background: var(--hover-raise-surface);
    }
    .card-item:not(.new-card-row) {
        counter-increment: card;
    }
        .card-item:not(.new-card-row)::before {
            content: "# " counter(card);
            position: absolute;
            left: var(--space-md);
            top: var(--space-md);
            font-size: var(--font-size-sm);
            color: var(--color-text-light);
            opacity: .12;
            font-weight: 400;
            letter-spacing: .2px;
            pointer-events: none;
        }

.card-content {
    flex-grow: 1;
    display: grid;
    grid-template-columns: 1fr 1fr auto auto;
    gap: var(--space-md);
    width: 100%;
    align-items: center;
}

.card-term, .card-definition {
    cursor: text;
    min-height: 40px;
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    word-break: break-word;
    line-height: 1.4;
    margin: 0;
}

.card-term {
    position: relative;
    padding-right: var(--space-md);
}
    .card-term::after {
        content: "";
        position: absolute;
        right: 0;
        top: 10%;
        height: 80%;
        width: 1px;
        background: var(--color-border);
    }

.difficulty-display {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.difficulty-level {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    cursor: pointer;
}
    .difficulty-level.active {
        color: var(--ink-on-solid);
        border-color: transparent;
    }
    .difficulty-level.easy.active {
        background: var(--color-primary);
    }
    .difficulty-level.medium.active {
        background: var(--color-warning);
    }
    .difficulty-level.hard.active {
        background: var(--color-danger);
    }

.card-actions {
    display: flex;
    gap: var(--space-sm);
}

.card-action-btn {
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    padding: var(--space-sm);
    font-size: var(--font-size-md);
    transition: background-color var(--transition-base), color var(--transition-base);
    border-radius: var(--border-radius-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}
    .card-action-btn:hover {
        background: var(--hover-raise-surface);
        color: var(--color-primary);
    }

.delete-card-btn:hover {
    color: var(--color-danger);
}

/* Editable fields */
.editable-field {
    cursor: text;
    transition: background-color .2s;
    border-radius: var(--border-radius-sm);
    padding: var(--space-xs) var(--space-sm);
    position: relative;
}
    .editable-field:hover {
        background: rgba(0,0,0,.05);
    }
    .editable-field.editing {
        background: var(--color-highlight);
        border: 1px solid var(--color-primary);
        outline: none;
    }
.new-card-row {
    background: rgba(0,0,0,.03);
    border: 1px dashed var(--color-border);
}
    .new-card-row .editable-field {
        color: var(--color-text-light);
        font-style: italic;
    }
.editable-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.tooltiptext {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    bottom: 100%;
    left: 0;
    background: var(--color-text-light);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: var(--font-size-sm);
    white-space: nowrap;
    transition: opacity .2s;
}

.editable-wrapper:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}
.editable-field[data-placeholder]:empty::before {
    content: attr(data-placeholder);
    color: var(--color-text-light);
    font-style: italic;
}
.edit-input::placeholder {
    color: var(--color-text-light);
    opacity: .7;
    font-style: italic;
}

/* Inline “Add Topic/Folder” rows */
.add-topic-placeholder {
    margin-top: var(--space-xs);
    padding: var(--space-sm);
    border: 1px dashed var(--color-border);
    border-radius: var(--border-radius-sm);
    background: var(--color-card-bg);
}

.new-topic-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-text);
    font-size: var(--font-size-sm);
    padding: var(--space-xs);
}
    .new-topic-input::placeholder {
        color: var(--color-text-light);
        font-style: italic;
    }

/* COMPLETION OVERLAY */
.completion-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.8);
    z-index: 4000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .5s ease;
}
    .completion-overlay.show {
        opacity: 1;
        pointer-events: all;
    }

.completion-box {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    max-width: 600px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transform: scale(.8);
    transition: transform .5s ease;
    position: relative;
    overflow: hidden;
}

.completion-overlay.show .completion-box {
    transform: scale(1);
}

.completion-title {
    font-size: 2rem;
    color: var(--color-gold);
    margin-bottom: var(--space-md);
    font-weight: 700;
}

.completion-subtitle {
    font-size: 1.2rem;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
}

.stats-container {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--space-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--color-text-light);
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--color-gold);
    border-radius: 50%;
    opacity: 0;
    animation: confetti-fall 3s ease-out forwards;
}

@keyframes confetti-fall {
    0% {
        transform: translateY(-100px) rotate(0);
        opacity: 1;
    }
    100% {
        transform: translateY(1000px) rotate(720deg);
        opacity: 0;
    }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        padding: var(--space-md);
    }
    .app-sidebar {
        border-right: none;
        border-bottom: var(--border-width) solid var(--color-border);
        padding: var(--space-md);
    }
    .flashcard {
        height: 250px;
    }
    .theme-controls, .study-modes, .answer-types {
        flex-direction: column;
    }
    .card-content {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    .card-term::after {
        display: none;
    }
    .difficulty-display {
        justify-content: center;
        margin-top: var(--space-sm);
    }
    .stats-container {
        flex-direction: column;
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-sm: .8125rem;
        --font-size-base: .9375rem;
        --font-size-md: 1.125rem;
        --font-size-lg: 1.25rem;
        --font-size-xl: 1.5rem;
    }
    body {
        padding: var(--space-md);
    }
    .flashcard {
        height: 220px;
    }
    .review-actions {
        flex-direction: column;
        align-items: center;
    }
        .review-actions .btn {
            width: 100%;
            max-width: 200px;
        }
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }
    .card-content {
        grid-template-columns: 1fr;
    }
    .card-term::after {
        display: none;
    }
    .search-input {
        height: 36px;
        padding-left: 38px;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .flashcard-inner {
        transition: none;
    }
    .modal.is-open .modal__dialog {
        transition: none;
    }
}

/* THEME parity for outline buttons */
html[data-theme="dark"] .btn-outline-secondary {
    color: var(--color-secondary);
    border-color: var(--color-secondary);
    background: transparent;
}
    html[data-theme="dark"] .btn-outline-secondary:hover {
        background: var(--color-secondary);
        color: #fff;
    }
html[data-theme="dark"] .btn-outline-success {
    color: var(--color-primary);
    border-color: var(--color-primary);
}
    html[data-theme="dark"] .btn-outline-success:hover {
        background: var(--color-primary);
        color: #111827;
    }
html[data-theme="dark"] .btn-outline-danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
}
    html[data-theme="dark"] .btn-outline-danger:hover {
        background: var(--color-danger);
        color: #fff;
    }

html[data-theme="blue"] .btn-outline-secondary {
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}
    html[data-theme="blue"] .btn-outline-secondary:hover {
        background: var(--color-secondary);
        color: #fff;
    }
.folder-name,
.topic-row .topic-name {
    font-weight: 500;
}

.folder-icon i.fa-folder-open {
    position: relative;
    overflow: hidden;
    display: inline-block;
    vertical-align: baseline;
    font-size: 1em;
    line-height: 1;
}
    .folder-icon i.fa-folder-open::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 5px;
        height: 5px;
        background: var(--app-bg);
        pointer-events: none;
    }
.folder-icon i.fa-folder-open {
    position: relative;
    top: 2px;
}
.flashcard:focus {
    outline: none !important;
    box-shadow: none !important;
}
.progress-bar {
    transition: width .2s ease;
}
.xp-indicator,
.xp-popup {
    display: none !important;
}

html[data-theme="dark"] {
    --color-text: #d3d8e2;
    --color-text-light: #a4adba;
}
.folder-name {
    font-weight: 550;
    letter-spacing: 0.1px;
}
.topic-row .topic-name {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.1px;
}
.folder-header {
    padding: 7px 12px;
}
.topic-row {
    padding: 7px 12px;
}
.folder-header,
.topic-row {
    border-color: color-mix(in srgb, var(--color-border) 80%, transparent);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
}
    .topic-row:hover {
        box-shadow: inset 0 0 3px rgba(34,197,94, .22);
    }
    .topic-row.active {
        color: #e9f6ee;
    }
        .topic-row.active .topic-name {
            font-weight: 520;
        }
.folder-toggle,
.topic-icon-btn {
    width: 26px;
    height: 26px;
    padding: 4px;
    font-size: 0.85rem;
}
    .topic-icon-btn i,
    .folder-toggle i {
        opacity: .9;
    }
.card-difficulty,
.card-topic {
    font-size: 0.72rem;
    padding: 0.18rem 0.48rem;
    font-weight: 600;
}
.control-group-title,
.topics-title {
    letter-spacing: .4px;
    color: color-mix(in srgb, var(--color-text-light) 88%, transparent);
}

html[data-theme="dark"] .topic-row.active {
    background: color-mix(in srgb, #22c55e 65%, #1a1f25);
    color: #e4f6ea;
    font-weight: 480;
    border-color: #22c55e;
}
    html[data-theme="dark"] .topic-row.active:hover {
        background: color-mix(in srgb, #22c55e 55%, #111416);
    }

.topic-list {
    gap: 5px;
}
.folder-header {
    margin: 2px 0 3px;
}
.folder-contents {
    padding: 2px 0 4px;
}
.folder-topic-list {
    gap: 4px;
    margin: 3px 0;
}
.app-main .progress-container {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    margin-top: var(--space-sm);
    margin-bottom: var(--space-md);
}
.progress-panel {
    max-width: none !important;
    width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease-out;
}
    .modal.is-open {
        pointer-events: auto;
        opacity: 1;
    }
.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(2px);
}
.modal__dialog {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    border: none;
    border-top: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
    width: min(480px, 100%);
    padding: var(--space-lg);
    position: relative;
    transform: scale(0.95);
    transition: transform 0.25s ease-out;
}
html[data-theme="dark"] .modal__dialog {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-top: 1px solid color-mix(in srgb, var(--color-text) 15%, transparent);
}
.modal.is-open .modal__dialog {
    transform: scale(1);
}
.modal__content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}
.modal__icon-container {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 4px;
}
    .modal__icon-container.danger {
        background-color: color-mix(in srgb, var(--color-danger) 15%, transparent);
    }
html[data-theme="dark"] .modal__icon-container.danger {
    background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
}
.modal__icon-container i {
    font-size: 1.25rem;
}
.modal__icon-container.danger i {
    color: var(--color-danger);
}
.modal__text-container {
    flex-grow: 1;
}
.modal__title {
    margin: 0 0 var(--space-xs);
    font-size: var(--font-size-md);
    font-weight: 600;
}
.modal__message {
    margin: 0;
    color: var(--color-text-light);
    white-space: pre-wrap;
    line-height: 1.5;
}
.modal__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
}
    .modal__actions .btn {
        font-weight: 600;
        border-radius: var(--border-radius-md);
        padding: 0.5rem 1rem;
        border: 1px solid transparent;
    }

/* === NEW: Input Modal Styles === */
.modal__input-container {
    margin-top: var(--space-md);
}

.modal__input {
    width: 100%;
    height: 40px;
    padding: 0 var(--space-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text);
    font-size: var(--font-size-base);
    caret-color: var(--color-primary);
    transition: all var(--transition-fast);
}

    .modal__input::placeholder {
        color: var(--color-text-light);
        opacity: 0.8;
    }

    .modal__input:focus {
        outline: none;
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-highlight);
        background-color: var(--color-card-bg);
    }

/* Light Theme Input (already covered by vars) */

/* Editorial Theme Input */
html[data-theme="editorial"] .modal__input {
    background-color: var(--color-bg);
    border-color: var(--color-border);
}

    html[data-theme="editorial"] .modal__input:focus {
        background-color: var(--color-card-bg);
    }
/* === END: Input Modal Styles === */

#confirmCancel.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    border-color: var(--color-border);
    color: var(--color-text-light);
}
    #confirmCancel.btn-outline:hover {
        background: var(--hover-raise-surface);
        color: var(--color-text);
        border-color: color-mix(in srgb, var(--color-text) 50%, transparent);
    }
#confirmOk.btn-danger {
    background: color-mix(in srgb, var(--color-danger) 15%, var(--color-card-bg));
    color: var(--color-danger);
    border-color: color-mix(in srgb, var(--color-danger) 40%, transparent);
}
    #confirmOk.btn-danger:hover {
        background: color-mix(in srgb, var(--color-danger) 25%, var(--color-card-bg));
        border-color: var(--color-danger);
        color: var(--color-danger);
    }
#confirmOk.btn-primary {
    background: color-mix(in srgb, var(--color-primary) 20%, var(--color-card-bg));
    color: var(--color-primary-dark);
    border-color: color-mix(in srgb, var(--color-primary) 50%, transparent);
}
    #confirmOk.btn-primary:hover {
        background: color-mix(in srgb, var(--color-primary) 30%, var(--color-card-bg));
        border-color: var(--color-primary);
    }
.blur-on-modal {
    filter: blur(3px);
    pointer-events: none;
    transition: filter 0.2s ease;
}
.modal__overlay {
    cursor: default;
}
.difficulty-level:hover {
    transform: scale(1.12);
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.25);
}
.difficulty-level.easy:hover {
    background: var(--color-primary);
    color: #111827;
    border-color: var(--color-primary);
}
.difficulty-level.medium:hover {
    background: var(--color-warning);
    color: #111827;
    border-color: var(--color-warning);
}
.difficulty-level {
    border-color: color-mix(in srgb, var(--color-border) 60%, transparent);
    opacity: 0.85;
}
    .difficulty-level.hard:hover {
        background: var(--color-danger);
        color: #111827;
        border-color: var(--color-danger);
    }
.card-item:hover .difficulty-level {
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.25);
}
.difficulty-level.active {
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.25);
}
.card-item:hover .difficulty-level.active {
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.25);
}
.difficulty-level {
    border-color: color-mix(in srgb, var(--color-border) 60%, transparent);
    opacity: 0.85;
    box-shadow: none;
}
.card-item:hover .difficulty-level {
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.2);
    opacity: 1;
}
    .card-item:hover .difficulty-level.active {
        box-shadow: 0 0 6px rgba(255, 255, 255, 0.35);
        border-color: rgba(255, 255, 255, 0.35);
    }
html[data-theme="dark"] .flashcard-face {
    background: #1b1f24;
}
html[data-theme="dark"] #manageBtn {
    background: #1b1f24;
    border-color: var(--color-border);
    color: var(--color-text-light);
}
html[data-theme="dark"] #manageBtn {
    background: #1b1f24;
    border-color: var(--color-border);
    color: var(--color-text-light);
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] #manageBtn:hover {
        background: #1b1f24;
        border-color: var(--color-secondary);
        color: var(--color-secondary);
    }
.btn,
.theme-btn,
.mode-btn,
.answer-btn,
.topic-add-btn,
.topic-icon-btn,
.folder-toggle {
    border-radius: var(--border-radius-md) !important;
}
.difficulty-level {
    border-radius: 50% !important;
}
html[data-theme="dark"] .review-actions .btn {
    background: transparent;
    border: 1px solid;
    transition: background-color 0.2s ease, color 0.2s ease;
}
html[data-theme="dark"] .review-actions .btn-success {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
    html[data-theme="dark"] .review-actions .btn-success:hover {
        background-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
    }
html[data-theme="dark"] .review-actions .btn-warning {
    border-color: var(--color-warning);
    color: var(--color-warning);
}
    html[data-theme="dark"] .review-actions .btn-warning:hover {
        background-color: color-mix(in srgb, var(--color-warning) 25%, transparent);
    }
html[data-theme="dark"] .review-actions .btn-danger {
    border-color: var(--color-danger);
    color: var(--color-danger);
}
    html[data-theme="dark"] .review-actions .btn-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 25%, transparent);
    }
html[data-theme="dark"] .difficulty-level {
    background: transparent;
    border-width: 2px;
    border-style: solid;
    opacity: 0.75;
    transform: scale(1);
    box-shadow: none;
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .difficulty-level.easy {
        border-color: var(--color-primary);
    }
    html[data-theme="dark"] .difficulty-level.medium {
        border-color: var(--color-warning);
    }
    html[data-theme="dark"] .difficulty-level.hard {
        border-color: var(--color-danger);
    }
    html[data-theme="dark"] .difficulty-level:not(.active):hover {
        opacity: 1;
        transform: scale(1.1);
    }
    html[data-theme="dark"] .difficulty-level.easy:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
    }
    html[data-theme="dark"] .difficulty-level.medium:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-warning) 20%, transparent);
    }
    html[data-theme="dark"] .difficulty-level.hard:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
    }
    html[data-theme="dark"] .difficulty-level.active {
        opacity: 1;
        transform: scale(1.1);
    }
    html[data-theme="dark"] .difficulty-level.easy.active {
        background-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
        box-shadow: 0 0 10px color-mix(in srgb, var(--color-primary) 50%, transparent);
    }
    html[data-theme="dark"] .difficulty-level.medium.active {
        background-color: color-mix(in srgb, var(--color-warning) 30%, transparent);
        box-shadow: 0 0 10px color-mix(in srgb, var(--color-warning) 50%, transparent);
    }
    html[data-theme="dark"] .difficulty-level.hard.active {
        background-color: color-mix(in srgb, var(--color-danger) 30%, transparent);
        box-shadow: 0 0 10px color-mix(in srgb, var(--color-danger) 50%, transparent);
    }
html[data-theme="dark"] .deck-manager-actions .btn {
    background: transparent;
    border-width: 1px;
    border-style: solid;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}
html[data-theme="dark"] .deck-manager-actions .btn-outline-danger {
    border-color: var(--color-danger);
    color: var(--color-danger);
}
    html[data-theme="dark"] .deck-manager-actions .btn-outline-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 25%, transparent);
        color: var(--color-danger);
    }
html[data-theme="dark"] .deck-manager-actions .btn-outline-success {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
    html[data-theme="dark"] .deck-manager-actions .btn-outline-success:hover {
        background-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
        color: var(--color-primary);
    }

html[data-theme="dark"] .deck-manager-actions .btn {
    background: transparent;
    border-width: 1px;
    border-style: solid;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}
html[data-theme="dark"] .deck-manager-actions .btn-outline-danger {
    border-color: var(--color-danger);
    color: var(--color-danger);
}
    html[data-theme="dark"] .deck-manager-actions .btn-outline-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 25%, transparent);
        color: var(--color-danger);
    }
html[data-theme="dark"] .deck-manager-actions .btn-outline-success {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
    html[data-theme="dark"] .deck-manager-actions .btn-outline-success:hover {
        background-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
        color: var(--color-primary);
    }
html[data-theme="dark"] .delete-topic-btn,
html[data-theme="dark"] .delete-folder-btn {
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .delete-topic-btn i,
    html[data-theme="dark"] .delete-folder-btn i {
        color: var(--color-text-light);
        transition: all 0.2s ease-in-out;
    }
    html[data-theme="dark"] .delete-topic-btn:hover,
    html[data-theme="dark"] .delete-folder-btn:hover {
        background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
        border-color: var(--color-danger);
    }
        html[data-theme="dark"] .delete-topic-btn:hover i,
        html[data-theme="dark"] .delete-folder-btn:hover i {
            color: var(--color-danger);
        }
html[data-theme="dark"] .delete-card-btn {
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .delete-card-btn:hover {
        color: var(--color-danger);
        background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
    }
html[data-theme="dark"] .modal__actions #confirmOk.btn-danger {
    background: transparent;
    border: 1px solid var(--color-danger);
    color: var(--color-danger);
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .modal__actions #confirmOk.btn-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 25%, transparent);
        color: var(--color-danger);
    }
html[data-theme="dark"] .deck-manager-actions #importCardsBtn {
    color: var(--color-text-light);
    border-color: var(--color-border);
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .deck-manager-actions #importCardsBtn:hover {
        background-color: var(--icon-hover-bg-bright);
        border-color: var(--color-text-light);
        color: var(--color-text);
    }
html[data-theme="dark"] .modal__actions #confirmCancel {
    color: var(--color-text-light);
    border-color: var(--color-border);
    background-color: transparent;
    transition: all 0.2s ease-in-out;
}
    html[data-theme="dark"] .modal__actions #confirmCancel:hover {
        background-color: var(--icon-hover-bg-bright);
        border-color: var(--color-text-light);
        color: var(--color-text);
    }
.topic-actions-trigger {
    background: transparent;
    border: none;
    color: var(--color-text-light);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
}
.topic-row:hover .topic-actions-trigger,
.folder-header:hover .topic-actions-trigger {
    opacity: 1;
    pointer-events: auto;
}
.topic-actions-trigger:hover {
    background-color: var(--icon-hover-bg-bright);
    color: var(--color-text);
}
.actions-context-menu {
    position: absolute;
    z-index: 100;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-xs) 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}
    .actions-context-menu.visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
.context-menu-item button {
    background: none;
    border: none;
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
}
    .context-menu-item button:hover {
        background-color: var(--hover-raise-surface);
    }
.context-menu-item.danger button {
    color: var(--color-danger);
}
    .context-menu-item.danger button:hover {
        background-color: color-mix(in srgb, var(--color-danger) 15%, transparent);
    }
html[data-theme="dark"] .edit-topic-btn:hover,
html[data-theme="dark"] .edit-folder-btn:hover {
    background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
    border-color: var(--color-primary);
}
html[data-theme="dark"] .delete-topic-btn:hover,
html[data-theme="dark"] .delete-folder-btn:hover {
    background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
    border-color: var(--color-danger);
}
html[data-theme="dark"] .edit-topic-btn:hover i,
html[data-theme="dark"] .edit-folder-btn:hover i {
    color: var(--color-primary) !important;
}
html[data-theme="dark"] .delete-topic-btn:hover i,
html[data-theme="dark"] .delete-folder-btn:hover i {
    color: var(--color-danger) !important;
}
.topic-row .topic-icon-btn:hover,
.folder-header .topic-icon-btn:hover {
    transform: none;
    box-shadow: none;
}
.deck-manager-content {
    padding: var(--space-md) 0;
}
.deck-manager-footer {
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}
.cards-list {
    border-top: none;
    padding-top: 0;
}
#manageBtn {
    padding: 0.55rem 1.5rem;
    font-size: 1rem;
}
.multiple-choice-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    width: 100%;
    max-width: 600px;
    margin-top: var(--space-xl);
}
.mc-option {
    padding: var(--space-md);
    text-align: center;
    justify-content: center;
    border-width: 1px;
    height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}
    .mc-option.correct {
        background-color: var(--color-highlight);
        border-color: var(--color-primary);
    }
    .mc-option.incorrect {
        background-color: color-mix(in srgb, var(--color-danger) 15%, transparent);
        border-color: var(--color-danger);
    }
.type-answer-container {
    display: flex;
    gap: var(--space-sm);
    width: 100%;
    max-width: 600px;
    margin-top: var(--space-xl);
    align-items: center;
}
.type-answer-input {
    flex-grow: 1;
    height: 48px;
    padding: 0 var(--space-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text);
    font-size: var(--font-size-base);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
    .type-answer-input:focus {
        outline: none;
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-highlight);
    }
    .type-answer-input.correct {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-highlight);
        background-color: color-mix(in srgb, var(--color-primary) 20%, var(--color-bg));
    }
    .type-answer-input.incorrect {
        border-color: var(--color-danger);
        box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-danger) 15%, transparent);
        background-color: color-mix(in srgb, var(--color-danger) 20%, var(--color-bg));
    }
.type-answer-container .btn-primary {
    height: 48px;
}
html[data-theme="light"] {
    --color-bg: #f4f5f7;
    --color-card-bg: #fcfcfd;
    --color-text: #172b4d;
    --color-text-light: #505f79;
    --color-border: #dfe1e6;
    --hover-raise-surface: rgba(9, 30, 66, 0.04);
    --icon-hover-bg-bright: rgba(9, 30, 66, 0.08);
}
html[data-theme="light"] .flashcard-face {
    background-color: var(--color-card-bg);
}
html[data-theme="light"] .theme-btn.active,
html[data-theme="light"] .mode-btn.active,
html[data-theme="light"] .answer-btn.active {
    color: #fff;
}
html[data-theme="light"] .review-actions .btn {
    background: transparent;
    border: 1px solid;
    transition: background-color 0.2s ease, color 0.2s ease;
}
html[data-theme="light"] .review-actions .btn-success {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}
    html[data-theme="light"] .review-actions .btn-success:hover {
        background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    }
html[data-theme="light"] .review-actions .btn-warning {
    border-color: var(--color-warning);
    color: var(--color-warning-dark);
}
    html[data-theme="light"] .review-actions .btn-warning:hover {
        background-color: color-mix(in srgb, var(--color-warning) 20%, var(--color-bg));
    }
html[data-theme="light"] .review-actions .btn-danger {
    border-color: var(--color-danger);
    color: var(--color-danger-dark);
}
    html[data-theme="light"] .review-actions .btn-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    }
html[data-theme="light"] .deck-manager-actions .btn-outline-success {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
    background: transparent;
}
    html[data-theme="light"] .deck-manager-actions .btn-outline-success:hover {
        background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
        box-shadow: 0 0 12px color-mix(in srgb, var(--color-primary) 30%, transparent);
    }
html[data-theme="light"] .deck-manager-actions .btn-outline-danger {
    border-color: var(--color-danger);
    color: var(--color-danger-dark);
    background: transparent;
}
    html[data-theme="light"] .deck-manager-actions .btn-outline-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
        color: var(--color-danger);
        box-shadow: 0 0 12px color-mix(in srgb, var(--color-danger) 30%, transparent);
    }
html[data-theme="light"] .deck-manager-actions #importCardsBtn:hover,
html[data-theme="light"] .modal__actions #confirmCancel:hover {
    background-color: var(--icon-hover-bg-bright);
    border-color: var(--color-text-light);
    color: var(--color-text);
}
html[data-theme="light"] .delete-topic-btn:hover,
html[data-theme="light"] .delete-folder-btn:hover {
    background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    border-color: var(--color-danger);
}
html[data-theme="light"] .delete-card-btn:hover {
    color: var(--color-danger);
    background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
}
html[data-theme="light"] .modal__actions #confirmOk.btn-danger {
    background: transparent;
    border: 1px solid var(--color-danger);
    color: var(--color-danger-dark);
}
    html[data-theme="light"] .modal__actions #confirmOk.btn-danger:hover {
        background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    }
html[data-theme="light"] .topic-row.active {
    background: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}
    html[data-theme="light"] .topic-row.active .topic-name {
        color: var(--color-primary-dark) !important;
    }
html[data-theme="light"] .edit-topic-btn:hover, html[data-theme="light"] .edit-folder-btn:hover {
    background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    border-color: var(--color-primary);
}
    html[data-theme="light"] .edit-topic-btn:hover i, html[data-theme="light"] .edit-folder-btn:hover i {
        color: var(--color-primary-dark) !important;
    }
html[data-theme="light"] .delete-topic-btn:hover i, html[data-theme="light"] .delete-folder-btn:hover i {
    color: var(--color-danger-dark) !important;
}
html[data-theme="light"] .difficulty-level {
    background: transparent;
    border-width: 2px;
    border-style: solid;
    opacity: 0.75;
}
    html[data-theme="light"] .difficulty-level.easy {
        border-color: var(--color-primary);
    }
    html[data-theme="light"] .difficulty-level.medium {
        border-color: var(--color-warning);
    }
    html[data-theme="light"] .difficulty-level.hard {
        border-color: var(--color-danger);
    }
    html[data-theme="light"] .difficulty-level:not(.active):hover {
        opacity: 1;
        transform: scale(1.1);
    }
    html[data-theme="light"] .difficulty-level.easy:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    }
    html[data-theme="light"] .difficulty-level.medium:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-warning) 20%, var(--color-bg));
    }
    html[data-theme="light"] .difficulty-level.hard:not(.active):hover {
        background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    }
    html[data-theme="light"] .difficulty-level.active {
        opacity: 1;
        transform: scale(1.1);
        color: #fff;
    }
    html[data-theme="light"] .difficulty-level.easy.active {
        background-color: var(--color-primary);
        box-shadow: 0 2px 8px color-mix(in srgb, var(--color-primary) 40%, transparent);
    }
    html[data-theme="light"] .difficulty-level.medium.active {
        background-color: var(--color-warning);
        box-shadow: 0 2px 8px color-mix(in srgb, var(--color-warning) 40%, transparent);
    }
    html[data-theme="light"] .difficulty-level.hard.active {
        background-color: var(--color-danger);
        box-shadow: 0 2px 8px color-mix(in srgb, var(--color-danger) 40%, transparent);
    }
html[data-theme="light"] #manageBtn {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text-light);
    transition: all 0.2s ease-in-out;
}
    html[data-theme="light"] #manageBtn:hover {
        background-color: var(--hover-raise-surface);
        border-color: var(--color-secondary);
        color: var(--color-secondary);
    }
html[data-theme="light"] .mc-option.correct {
    background-color: color-mix(in srgb, var(--brand-500) 20%, var(--color-bg));
    border-color: var(--brand-500);
    color: var(--brand-600);
}
html[data-theme="light"] .mc-option.incorrect {
    background-color: color-mix(in srgb, var(--danger-500) 15%, var(--color-bg));
    border-color: var(--danger-500);
    color: var(--danger-600);
}
html[data-theme="light"] .type-answer-input.correct {
    border-color: var(--brand-500);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-500) 20%, transparent);
    background-color: color-mix(in srgb, var(--brand-500) 25%, var(--color-bg));
}
html[data-theme="light"] .type-answer-input.incorrect {
    border-color: var(--danger-500);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger-500) 20%, transparent);
    background-color: color-mix(in srgb, var(--danger-500) 20%, var(--color-bg));
}

.card-difficulty,
.card-topic {
    border: 1px solid;
    font-weight: 600;
}
html[data-theme="light"] .card-difficulty.easy {
    background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border));
    color: var(--brand-600);
}
html[data-theme="light"] .card-difficulty.medium {
    background-color: color-mix(in srgb, var(--color-warning) 20%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-warning) 40%, var(--color-border));
    color: var(--warn-600);
}
html[data-theme="light"] .card-difficulty.hard {
    background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-danger) 30%, var(--color-border));
    color: var(--danger-600);
}
html[data-theme="light"] .card-topic {
    background-color: color-mix(in srgb, var(--color-secondary) 15%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-secondary) 30%, var(--color-border));
    color: var(--info-600);
}
html[data-theme="dark"] .card-difficulty.easy {
    background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
    border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
    color: var(--color-primary);
}
html[data-theme="dark"] .card-difficulty.medium {
    background-color: color-mix(in srgb, var(--color-warning) 25%, transparent);
    border-color: color-mix(in srgb, var(--color-warning) 50%, transparent);
    color: var(--color-warning);
}
html[data-theme="dark"] .card-difficulty.hard {
    background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
    border-color: color-mix(in srgb, var(--color-danger) 40%, transparent);
    color: var(--color-danger);
}
html[data-theme="dark"] .card-topic {
    background-color: color-mix(in srgb, var(--color-secondary) 20%, transparent);
    border-color: color-mix(in srgb, var(--color-secondary) 40%, transparent);
    color: var(--color-secondary);
}
.theme-btn:not(.active):hover,
.mode-btn:not(.active):hover,
.answer-btn:not(.active):hover {
    background-color: var(--hover-raise-surface);
    border-color: var(--color-border);
    color: var(--color-text);
}
html[data-theme="light"] .theme-btn:not(.active):hover,
html[data-theme="light"] .mode-btn:not(.active):hover,
html[data-theme="light"] .answer-btn:not(.active):hover {
    background-color: rgba(9, 30, 66, 0.08);
    border-color: #c1c7d0;
    color: var(--color-text);
}
.completion-overlay {
    backdrop-filter: blur(4px);
}
.completion-box {
    border-top: 1px solid color-mix(in srgb, var(--color-text) 10%, transparent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
html[data-theme="light"] .completion-box {
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}
.completion-title {
    color: var(--color-primary);
}
.stats-container {
    gap: var(--space-md);
    padding: var(--space-md) 0;
}
.stat-item {
    flex: 1;
    padding: var(--space-md);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--hover-raise-surface);
}
html[data-theme="light"] .stat-item {
    background-color: color-mix(in srgb, var(--color-bg) 50%, transparent);
}
.stat-value {
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}
#closeCompletionBtn {
    width: 100%;
    max-width: 300px;
    margin-top: var(--space-md);
    color: #fff;
    font-weight: 600;
    border: none;
    background: linear-gradient(145deg, var(--brand-600), var(--brand-500));
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.15), 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.2s ease-in-out;
}
    #closeCompletionBtn:hover {
        filter: brightness(1.1);
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 6px 20px rgba(0,0,0,0.25);
        transform: translateY(-2px);
    }
    #closeCompletionBtn:active {
        transform: translateY(0);
        filter: brightness(1);
    }
#closeCompletionBtn {
    width: 100%;
    max-width: 300px;
    margin-top: var(--space-md);
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 500;
    filter: none;
    box-shadow: none;
    transition: all 0.2s ease-in-out;
}
    #closeCompletionBtn:hover {
        background-color: color-mix(in srgb, var(--color-primary) 25%, transparent);
        box-shadow: 0 0 12px color-mix(in srgb, var(--color-primary) 40%, transparent);
        transform: none;
    }
.card-item:not(.new-card-row)::before {
    content: "# " counter(card);
    position: absolute;
    left: var(--space-md);
    top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    letter-spacing: .2px;
    pointer-events: none;
    opacity: 0.25;
    font-weight: 500;
}
.delete-card-btn {
    color: var(--color-text-light);
    background-color: transparent;
    border-radius: var(--border-radius-md);
}
html[data-theme="light"] .delete-card-btn:hover {
    background-color: color-mix(in srgb, var(--color-danger) 15%, var(--color-bg));
    color: var(--color-danger-dark);
}
html[data-theme="dark"] .delete-card-btn:hover {
    background-color: color-mix(in srgb, var(--color-danger) 20%, transparent);
    color: var(--color-danger);
}
.card-item {
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
    .card-item:hover {
        transform: translateY(-2px);
        border-color: var(--color-primary);
        box-shadow: var(--shadow-md);
    }
html[data-theme="dark"] .card-item:hover {
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
}
.editable-field {
    border: 1px dashed transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
html[data-theme="light"] .editable-field:hover {
    background-color: color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
    border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border));
}
html[data-theme="dark"] .editable-field:hover {
    background-color: color-mix(in srgb, var(--color-primary) 15%, transparent);
    border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
}
.tooltiptext {
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-style: normal;
    font-weight: 500;
    z-index: 10;
}
.card-item:not(.new-card-row)::before {
    content: "# " counter(card);
    position: absolute;
    left: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    letter-spacing: .2px;
    pointer-events: none;
    font-weight: 500;
    top: 0.5rem;
    opacity: 0.25;
    transition: opacity 0.2s ease;
}
.card-item:not(.new-card-row):hover::before {
    opacity: 0;
}
.card-item {
    padding-left: 52px;
}
.flashcard-area {
    position: relative;
    width: 100%;
    max-width: 600px;
}
.flashcard-viewer {
    position: relative;
}
.card-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-card-bg);
    color: var(--color-text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease-in-out;
}
    .card-nav-btn:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        transform: translateY(-50%) scale(1.05);
        box-shadow: var(--shadow-md);
    }
    .card-nav-btn:active {
        transform: translateY(-50%) scale(0.98);
        box-shadow: none;
    }
    .card-nav-btn:disabled {
        opacity: 0.3;
        cursor: not-allowed;
        pointer-events: none;
        box-shadow: none;
    }
    .card-nav-btn.prev {
        left: calc(-44px - var(--space-lg));
    }
    .card-nav-btn.next {
        right: calc(-44px - var(--space-lg));
    }
html[data-theme="light"] .card-nav-btn:hover {
    background-color: color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
}
html[data-theme="dark"] .card-nav-btn:hover {
    background-color: color-mix(in srgb, var(--color-primary) 15%, transparent);
}
@media (max-width: 768px) {
    .card-nav-btn.prev {
        left: 5px;
    }
    .card-nav-btn.next {
        right: 5px;
    }
}
.multiple-choice-container.answered .mc-option {
    pointer-events: none;
}
.answer-ui-container {
    margin-top: -2rem;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}
#multipleChoiceContainer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 600px;
    margin-top: var(--space-lg); /* ADDED: Matches .review-actions margin */
}
html[data-theme="light"] .mc-option.correct,
html[data-theme="light"] .mc-option.incorrect,
html[data-theme="editorial"] .mc-option.correct,
html[data-theme="editorial"] .mc-option.incorrect {
}
html[data-theme="editorial"] .mc-option.correct {
    background-color: #78887b;
    border-color: #78887b;
    color: var(--ink-on-solid);
}
html[data-theme="editorial"] .mc-option.incorrect {
    background-color: #c08470;
    border-color: #c08470;
    color: var(--ink-on-solid);
}
.mc-option {
    white-space: normal;
    height: auto;
    min-height: 60px; /* ADDED: Ensures consistent min-height */
    line-height: 1.4;
    text-align: center;
    flex-grow: 1; /* ADDED: Allows buttons to grow */
    flex-basis: 150px; /* ADDED: Sets a base width */
    max-width: 30%; /* ADDED: Encourages 3-across layout */
}
html[data-theme="editorial"] .folder-item.droppable-ok .folder-header,
html[data-theme="editorial"] ul#topicList.droppable-ok {
    background-color: transparent !important;
    border-radius: 8px;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary-dark) 60%, transparent);
}
html[data-theme="editorial"] .topic-row.reorder-before {
    border-top-color: var(--color-primary-dark);
}
html[data-theme="editorial"] .topic-row.reorder-after {
    border-bottom-color: var(--color-primary-dark);
}
html[data-theme="editorial"] .folder-item:hover > .folder-header {
    background-color: transparent !important;
    border-color: transparent !important;
    border-radius: 8px;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary-dark) 60%, transparent);
}
html[data-theme="editorial"] .topic-row.active .topic-icon-btn {
    background-color: transparent;
    border-color: transparent;
    transition: background-color 0.15s ease-in-out;
}
html[data-theme="editorial"] .topic-row.active:hover .topic-icon-btn {
    background-color: var(--icon-hover-bg-bright);
}
html[data-theme="editorial"] .topic-row.active .topic-icon-btn i {
    color: var(--color-text) !important;
}
html[data-theme="light"] .difficulty-display .difficulty-level {
    background-color: transparent;
    border: 1px solid;
}
    html[data-theme="light"] .difficulty-display .difficulty-level.easy {
        border-color: var(--brand-500);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level.medium {
        border-color: var(--warn-500);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level.hard {
        border-color: var(--danger-500);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level:not(.active):hover {
        background-color: rgba(0, 0, 0, 0.04);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level.easy.active {
        background-color: color-mix(in srgb, var(--brand-500) 20%, transparent);
        border-color: var(--brand-500);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level.medium.active {
        background-color: color-mix(in srgb, var(--warn-500) 20%, transparent);
        border-color: var(--warn-500);
    }
    html[data-theme="light"] .difficulty-display .difficulty-level.hard.active {
        background-color: color-mix(in srgb, var(--danger-500) 15%, transparent);
        border-color: var(--danger-500);
    }
.custom-tooltip {
    position: fixed;
    background-color: var(--color-card-bg);
    color: var(--color-text);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 1000;
    max-width: 300px;
    text-align: center;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-100%) translateY(5px);
    transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
}
    .custom-tooltip.visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(-100%);
    }
.folder-header.editorial-hover {
    background-color: transparent !important;
    border-color: transparent !important;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary-dark) 60%, transparent) !important;
}
/* ... стили .folder-header.editorial-hover ... */
html[data-theme="light"] .flashcard-face {
    background-color: #f7f8f9;
}

/* === PAGINATION STYLES (NEW) === */
/* ... */
}
html[data-theme="editorial"] .flashcard-face {
    background-color: #f9f6f1;
}

/* === FINAL UNIFIED TOPIC & FOLDER SIZES === */

/* Sets the final, consistent size and weight for folder names. */
.folder-name {
    font-size: 0.98rem;
    font-weight: 500;
}

/* Sets the final, consistent size and weight for topic names. */
.topic-row .topic-name {
    font-size: 0.92rem;
    font-weight: 400;
}
/* === PAGINATION STYLES (NEW) === */
.deck-manager-footer {
    padding: var(--space-md) 0;
    margin-top: auto;
    border-top: 1px solid var(--color-border);
}

.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
}

.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    background-color: var(--color-card-bg);
    color: var(--color-text-light);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

    .pagination-btn:not(:disabled):hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        background-color: var(--hover-raise-surface);
    }

    /* --- Active Pagination Button (Topic-Synced Style) --- */
    .pagination-btn.active {
        font-weight: 700;
    }

/* Light Theme Style */
html[data-theme="light"] .pagination-btn.active {
    background-color: color-mix(in srgb, var(--color-primary) 15%, var(--color-bg));
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

/* Dark Theme Style */
html[data-theme="dark"] .pagination-btn.active {
    background-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
    border-color: var(--color-primary);
    color: #fff !important; /* Switched to high-contrast dark text to match other active buttons in this theme. */
}

/* Editorial Theme Style */
html[data-theme="editorial"] .pagination-btn.active {
    background-color: var(--color-highlight);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
/* === GLOBAL OVERRIDE FOR START STUDYING BUTTON HOVER FONT === */
#startStudyingBtn:hover {
    color: #fff !important;
}
/* === OVERRIDE FOR #importCardsBtn VISUALS === */
/* Restore the original neutral text and border colors from the .btn-text class. */
#importCardsBtn {
    color: var(--color-text);
    border-color: var(--color-border);
}

    /* Restore the original subtle hover effect. */
    #importCardsBtn:hover {
        background-color: var(--hover-raise-surface);
        color: var(--color-text);
    }
/* === NEW: Success state for modal icon === */
.modal__icon-container.success {
    background-color: color-mix(in srgb, var(--color-primary) 15%, transparent);
}

    .modal__icon-container.success i {
        color: var(--color-primary);
    }

html[data-theme="dark"] .modal__icon-container.success {
    background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
}
/* === FINAL FIX: Neutral icon appearance on active topic hover in Light Theme === */

/* When hovering over an active row in the Light theme... */
html[data-theme="light"] .topic-row.active:hover .topic-icon-btn {
    /* ...apply the standard light grey circular hover background to the icon buttons... */
    background-color: var(--icon-hover-bg-bright);
}

    html[data-theme="light"] .topic-row.active:hover .topic-icon-btn i {
        /* ...and force the icons themselves to use the main dark text color. */
        color: var(--color-text) !important;
    }
/* === FINAL FIX: Prevent icon whitening on active topics in Light Theme === */
/* This rule has high specificity to override the default white icon color on active rows, only for the Light theme. */
html[data-theme="light"] .topic-row.active .topic-icon-btn i {
    color: var(--color-text) !important;
}
/* === FINAL UNIFIED TOPIC & FOLDER SIZES === */
.folder-name {
    font-size: 0.98rem;
    font-weight: 500; /* This will now apply everywhere */
}
/* === Manager Search Bar (NEW) === */
.search-container {
    padding: 0 0 var(--space-md);
    margin-bottom: 0;
    border-bottom: 1px solid var(--color-border);
}

.search-field {
    position: relative;
}

    .search-field i {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-text-light);
        pointer-events: none;
        transition: color 0.2s ease;
    }

.search-input {
    width: 100%;
    height: 40px;
    padding: 0 12px 0 40px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-bg);
    color: var(--color-text);
    caret-color: var(--color-primary);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

    .search-input::placeholder {
        color: var(--color-text-light);
        opacity: .85;
    }

    .search-input:hover {
        background: var(--hover-raise-surface);
    }

    .search-input:focus {
        outline: none;
        background: var(--color-card-bg);
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-highlight);
    }

        .search-input:focus + i {
            color: var(--color-primary);
        }

    /* Hide the native clear ('x') button in Webkit browsers */
    .search-input::-webkit-search-cancel-button {
        -webkit-appearance: none;
    }
/* === PAGINATION STYLES (NEW) === */
.deck-manager-footer {
    padding: var(--space-md) 0;
    margin-top: auto;
    border-top: 1px solid var(--color-border);
}

.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
}

.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    background-color: var(--color-card-bg);
    color: var(--color-text-light);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

    .pagination-btn:not(:disabled):hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        background-color: var(--hover-raise-surface);
    }

    .pagination-btn.active {
        background-color: var(--color-primary);
        border-color: var(--color-primary);
        color: #fff;
        font-weight: 700;
    }

html[data-theme="dark"] .pagination-btn.active {
    color: #111827;
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.topics-actions {
    display: flex;
    align-items: center;
    gap: 6px; /* Increased from var(--space-xs) which is 4px */
}

/* =================================
   KARDI PET STYLES (Updated for your SVG)
   ================================= */

/* 1. The main container for the pet */
.kardi-pet {
    position: absolute;
    bottom: 20px;
    right: 30px;
    width: 120px;
    height: 120px;
    z-index: 1000; /* Above content, below modals */
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

    .kardi-pet svg {
        width: 100%;
        height: 100%;
        /* This prevents the SVG from being cut off during animations */
        overflow: visible;
    }

/* * 2. STATE: Asleep (Initial State) 
 * - Kardi starts lowered and slightly faded.
 * - We hide the "awake" face and show the "sleeping" face.
 */
.kardi-pet--asleep {
    transform: translateY(40px); /* Starts "off-screen" */
    opacity: 0;
}

    .kardi-pet--asleep #kardi-eyes-open {
        display: none; /* Hide open eyes, smile, blush */
    }

    .kardi-pet--asleep #kardi-eyes-asleep {
        display: block !important; /* Show sleeping eyes */
    }

/* * 3. STATE: Waking Up (Animation)
 * - This class is added by JS to trigger the "wake up" sequence.
 */
.kardi-pet--waking-up {
    animation: kardi-wake-up 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

    .kardi-pet--waking-up #kardi-eyes-open {
        display: block !important; /* Show open eyes */
    }

    .kardi-pet--waking-up #kardi-eyes-asleep {
        display: none !important; /* Hide sleeping eyes */
    }
/* * 4. STATE: Happy (Animation)
 * - This class is added by JS every time the user answers a card.
 * - We target the #layer1 group INSIDE the SVG for a jiggle effect.
 */
.kardi-pet--happy #layer1 {
    /* We run our new "happy jump" animation one time */
    animation: kardi-happy-jump 0.6s ease-in-out 1;
}
/* * 5. STATE: Sad (Animation)
 * - This class is added by JS on a wrong answer.
 * - It shows the "sad" eyes and triggers a "shake" animation.
 */
.kardi-pet--sad #kardi-eyes-open {
    display: none !important; /* Hide open eyes */
}

.kardi-pet--sad #kardi-eyes-asleep {
    display: none !important; /* Hide sleeping eyes */
}

.kardi-pet--sad #kardi-eyes-sad {
    display: block !important; /* Show sad eyes */
}

.kardi-pet--sad #layer1 {
    animation: kardi-cringe-shake 0.4s ease-in-out 1;
}


/* =================================
   KARDI KEYFRAME ANIMATIONS
   ================================= */

/* The animation for waking up */
@keyframes kardi-wake-up {
    0% {
        transform: translateY(40px); /* Start low */
        opacity: 0;
    }

    60% {
        transform: translateY(-10px); /* Overshoot (a little "stretch") */
        opacity: 1;
    }

    100% {
        transform: translateY(0); /* Settle in idle position */
        opacity: 1;
    }
}

/* NEW: The animation for the "happy jump" */
@keyframes kardi-happy-jump {
    0%, 100% {
        transform: translateY(0) scale(1, 1); /* Start and end on the ground */
        animation-timing-function: ease-in;
    }

    20% {
        transform: translateY(0) scale(1.1, 0.9); /* "Squash" down to prepare */
    }

    50% {
        transform: translateY(-35px) scale(0.9, 1.1); /* Jump to peak, "stretch" */
        animation-timing-function: ease-out;
    }

    80% {
        transform: translateY(0) scale(1.05, 0.95); /* Land and "squash" */
    }
}}

/* NEW: The animation for a "wrong answer" shake */
@keyframes kardi-cringe-shake {
    0%, 100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-8px) rotate(-5deg);
    }

    75% {
        transform: translateX(8px) rotate(5deg);
    }
}

/* =================================
   СТИЛИ ДЛЯ КАРДИ (ПОЛНАЯ ВЕРСИЯ)
   ================================= */

/* 1. Основной контейнер */
.kardi-pet {
    position: absolute;
    bottom: 20px;
    right: 30px;
    width: 120px;
    height: 120px;
    z-index: 1000; /* Выше контента, но ниже модальных окон */
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

    .kardi-pet svg {
        width: 100%;
        height: 100%;
        overflow: visible; /* Важно, чтобы анимации не обрезались */
    }

/* 2. СОСТОЯНИЕ: Сон (Изначальное) */
.kardi-pet--asleep {
    transform: translateY(40px); /* Начинает "под" экраном */
    opacity: 0;
}

    .kardi-pet--asleep #kardi-eyes-open {
        display: none;
    }

    .kardi-pet--asleep #kardi-eyes-sad {
        display: none;
    }

    .kardi-pet--asleep #kardi-eyes-embarrassed {
        display: none;
    }

    .kardi-pet--asleep #kardi-eyes-asleep {
        display: block !important;
    }
/* Показываем спящие глаза */

/* 3. СОСТОЯНИЕ: Пробуждение */
.kardi-pet--waking-up {
    animation: kardi-wake-up 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

    .kardi-pet--waking-up #kardi-eyes-open {
        display: block !important;
    }
    /* Показываем обычные глаза */
    .kardi-pet--waking-up #kardi-eyes-asleep {
        display: none !important;
    }

    .kardi-pet--waking-up #kardi-eyes-sad {
        display: none !important;
    }

    .kardi-pet--waking-up #kardi-eyes-embarrassed {
        display: none !important;
    }

/* === UPDATED: Comic-Style Speech Bubble (Adjusted Height) === */
.kardi-speech-bubble {
    position: absolute;
    bottom: 100%;
    left: -25px;
    /* CHANGED: -5px lifts it up slightly from the previous -15px */
    margin-bottom: -5px;
    background: #fff;
    border: 2px solid #111827;
    color: #111827;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
    z-index: 1001;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    box-shadow: 2px 2px 0px rgba(0,0,0,0.1);
}

    /* 1. The larger black triangle (Outline) */
    .kardi-speech-bubble::before {
        content: '';
        position: absolute;
        /* CHANGED: 100% puts it exactly at the bottom edge, no guessing */
        top: 100%;
        left: 30px;
        border-width: 14px 0 0 14px;
        border-style: solid;
        border-color: #111827 transparent transparent transparent;
    }

    /* 2. The smaller white triangle (Filler) */
    .kardi-speech-bubble::after {
        content: '';
        position: absolute;
        /* CHANGED: Moves UP by 2px (border width) to firmly cover the bottom line */
        top: calc(100% - 2px);
        left: 32px;
        border-width: 11px 0 0 11px;
        border-style: solid;
        border-color: #fff transparent transparent transparent;
        z-index: 1;
    }

/* Logic to show bubble when awake */
.kardi-pet.kardi-pet--awake .kardi-speech-bubble {
    opacity: 1;
    transform: translateY(0);
}

/* =================================
   АНИМАЦИИ КАРДИ (KEYFRAMES)
   ================================= */

/* Анимация "Пробуждение" */
@keyframes kardi-wake-up {
    0% {
        transform: translateY(40px);
        opacity: 0;
    }

    60% {
        transform: translateY(-10px);
        opacity: 1;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}