/* ==========================================================================
   Design System & Premium Aesthetics (Midnight Library Theme)
   ========================================================================== */

:root {
    /* Colors */
    --bg-primary: #0a0e17;
    --bg-secondary: #121824;
    --bg-tertiary: #1b2336;
    --bg-glass: rgba(18, 24, 36, 0.7);
    
    --border-glass: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.15);
    --border-active-gold: rgba(217, 119, 6, 0.4);
    --border-active-indigo: rgba(99, 102, 241, 0.4);
    
    --accent-gold: #d97706;
    --accent-gold-hover: #f59e0b;
    --accent-gold-rgb: 217, 119, 6;
    --accent-indigo: #6366f1;
    --accent-indigo-hover: #818cf8;
    --accent-indigo-rgb: 99, 102, 241;
    --accent-emerald: #10b981;
    --accent-emerald-hover: #34d399;
    --accent-rose: #f43f5e;
    --accent-rose-hover: #fb7185;

    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --text-gold: #fbbf24;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow-indigo: 0 8px 32px rgba(99, 102, 241, 0.15);
    --shadow-glow-gold: 0 8px 32px rgba(217, 119, 6, 0.12);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* ==========================================================================
   Base Styles & Reset
   ========================================================================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-indigo);
}

/* ==========================================================================
   Layout Structures
   ========================================================================== */

.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 48px;
}

.brand-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-gold);
    stroke-width: 1.5;
}

.brand-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.brand-text span {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-gold);
    font-family: 'Playfair Display', serif;
    display: block;
    margin-top: -2px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    transition: all var(--transition-fast);
}

.nav-item i {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    transition: transform var(--transition-fast);
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.nav-item:hover i {
    transform: translateX(2px);
}

.nav-item.active {
    background-color: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border-active-indigo);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.05);
}

.nav-item.active i {
    color: var(--accent-indigo-hover);
}

.nav-item .badge {
    margin-left: auto;
    background-color: var(--accent-indigo);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.sidebar-footer {
    border-top: 1px solid var(--border-glass);
    padding-top: 24px;
}

.sidebar-footer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
    font-family: 'Nanum Myeongjo', serif;
    margin-bottom: 8px;
}

.sidebar-footer small {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

/* Top Bar Styling */
.top-bar {
    height: 72px;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-glass);
    background-color: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 90;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

.breadcrumb {
    font-family: 'Playfair Display', 'Nanum Myeongjo', serif;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.breadcrumb span {
    color: var(--text-primary);
    position: relative;
    padding-left: 12px;
}

.breadcrumb span::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 14px;
    background-color: var(--accent-gold);
    border-radius: var(--radius-full);
}

/* View Panel Wrapper */
.view-panel {
    display: none;
    padding: 40px;
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    animation: fadeIn var(--transition-normal);
}

.view-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Reusable UI Elements & Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--accent-indigo);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-indigo-hover);
    box-shadow: var(--shadow-glow-indigo);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    border-color: var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
}

.btn-success {
    background-color: var(--accent-emerald);
    color: white;
}

.btn-success:hover {
    background-color: var(--accent-emerald-hover);
}

.btn-danger {
    background-color: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: #fda4af;
}

.btn-danger:hover {
    background-color: var(--accent-rose);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.quote-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--accent-gold);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-primary);
}

/* Form Controls */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.form-group input[type="text"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
}

.inline-group {
    flex: 1;
    margin-bottom: 0;
}

/* ==========================================================================
   Dashboard View Components
   ========================================================================== */

.welcome-header {
    margin-bottom: 16px;
    display: flex;
    align-items: baseline;
    gap: 16px;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.welcome-header:hover {
    opacity: 0.85;
}

.welcome-header h2 i {
    transition: transform var(--transition-normal), color var(--transition-fast);
}

.welcome-header:hover h2 i {
    transform: rotate(30deg);
}

.welcome-header h2 {
    font-size: 1.5rem;
    font-family: 'Playfair Display', 'Nanum Myeongjo', serif;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-header p {
    display: none;
}

/* Grid of Cards */
.dashboard-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 14px;
}

/* Category Tabs */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.cat-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: 'Noto Sans KR', sans-serif;
    white-space: nowrap;
}

.cat-tab i {
    width: 14px;
    height: 14px;
}

.cat-tab:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(99, 102, 241, 0.08);
}

.cat-tab.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.5);
    color: var(--accent-indigo-hover);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
}

.cat-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 18px;
    padding: 0 5px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1;
}

.tab-text-short {
    display: none;
}
.tab-text-full {
    display: inline;
}

.cat-tab[data-cat="negative"].active {
    background: rgba(244, 63, 94, 0.1);
    border-color: rgba(244, 63, 94, 0.4);
    color: #fb7185;
    box-shadow: 0 0 12px rgba(244, 63, 94, 0.12);
}

.cat-tab[data-cat="positive"].active {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.4);
    color: #34d399;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.12);
}

.cat-tab[data-cat="values"].active {
    background: rgba(217, 119, 6, 0.1);
    border-color: rgba(217, 119, 6, 0.4);
    color: var(--text-gold);
    box-shadow: 0 0 12px rgba(217, 119, 6, 0.12);
}

.cat-tab[data-cat="existential"].active {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.4);
    color: #a78bfa;
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.12);
}

/* ============================================================
   Keyword Table Layout (replaces card grid)
   ============================================================ */

.kw-table-wrap {
    width: 100%;
}

/* All-categories: 2-column grid of categories */
.kw-all-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.kw-col {
    background: rgba(255, 255, 255, 0.01);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: visible;
    align-content: start;
    padding: 12px;
}

.kw-col-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.03);
    border-bottom: 2px solid var(--cat-color, var(--accent-indigo));
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--cat-color, var(--accent-indigo));
    letter-spacing: 0.03em;
}

.kw-col-header i {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.kw-col-header em {
    margin-left: auto;
    font-style: normal;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Single-category header */
.kw-single-header {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    border: 1px solid var(--border-glass);
    border-bottom: 2px solid var(--cat-color, var(--accent-indigo));
    margin-bottom: 1px;
    padding: 11px 16px;
}

/* Single-category 4-column grid */
.kw-single-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-glass);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow: visible;
    padding: 12px;
}

/* Individual keyword row (Redesigned as Card Chip Box) */
.kw-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-sizing: border-box;
    min-width: 0;
}

.kw-row:hover {
    background: rgba(212, 175, 55, 0.08);
    border-color: var(--border-active-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Trending Keywords Highlights (Size remains exactly same, only style is highlighted) */
.kw-row.kw-trending {
    border-color: rgba(212, 175, 55, 0.4);
    background: rgba(212, 175, 55, 0.05);
    box-shadow: inset 0 0 6px rgba(212, 175, 55, 0.08);
}

.kw-row.kw-trending .kw-kr {
    color: #ffd700;
    font-weight: 800;
}

.kw-row.kw-trending .kw-icon {
    color: #ffd700;
}

.kw-row.kw-trending:hover {
    background: rgba(212, 175, 55, 0.12);
    border-color: var(--border-active-gold);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.25);
}

.kw-row:hover .kw-kr {
    color: var(--border-active-gold);
}

.kw-row:hover .kw-icon {
    color: var(--border-active-gold);
}

.kw-icon {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.kw-kr {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 0.94rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

.kw-en {
    display: none;
}

.kw-arrow {
    display: none;
}

.kw-empty {
    grid-column: 1 / -1;
    padding: 16px 14px;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
    background: var(--bg-secondary);
}


/* ==========================================================================
   Concept Explorer View Components
   ========================================================================== */

.explorer-header {
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 32px;
    margin-bottom: 32px;
}

.btn-back {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    margin-bottom: 24px;
    transition: color var(--transition-fast);
}

.btn-back:hover {
    color: var(--text-primary);
}

.btn-back i {
    width: 16px;
    height: 16px;
}

.concept-meta .concept-tag {
    font-family: 'Playfair Display', serif;
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    color: var(--accent-gold);
    font-weight: 600;
}

.concept-meta h2 {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 2.5rem;
    font-weight: 800;
    margin: 4px 0 12px 0;
}

.concept-quote {
    font-family: 'Nanum Myeongjo', serif;
    font-style: italic;
    font-size: 1.15rem;
    color: var(--text-secondary);
    border-left: 2px solid var(--accent-gold);
    padding-left: 16px;
}

.explorer-body {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
    align-items: start;
}

/* Reading Materials Panel (Left) */
.material-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.tabs-nav {
    display: flex;
    background-color: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--border-glass);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    padding: 18px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.tab-btn i {
    width: 18px;
    height: 18px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
    color: var(--accent-gold);
    border-bottom-color: var(--accent-gold);
    background-color: rgba(18, 24, 36, 0.3);
}

.tab-content {
    display: none;
    padding: 32px;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

/* Philosophical Perspectives Selector */
.perspective-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--border-glass);
    flex-wrap: wrap;
}

.perspective-btn {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.perspective-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.02);
}

.perspective-btn.active {
    background-color: rgba(217, 119, 6, 0.12);
    border-color: var(--accent-gold);
    color: var(--text-gold);
    box-shadow: 0 2px 10px rgba(217, 119, 6, 0.05);
}

.reading-material {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.material-source {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.material-source .author {
    font-weight: 600;
    color: var(--text-primary);
}

.material-source .source-title {
    color: var(--accent-gold);
    font-family: 'Nanum Myeongjo', serif;
    font-style: italic;
}

.passage-box {
    background-color: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-md);
    padding: 28px;
    border-left: 4px solid var(--accent-gold);
    position: relative;
}

.quote-start-icon {
    font-family: 'Playfair Display', serif;
    font-size: 4rem;
    color: rgba(217, 119, 6, 0.15);
    position: absolute;
    top: -10px;
    left: 15px;
    line-height: 1;
    user-select: none;
}

.passage-box blockquote {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

.collect-action {
    display: flex;
    justify-content: flex-end;
}

.commentary-box {
    border-top: 1px solid var(--border-glass);
    padding-top: 24px;
}

.commentary-box h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--accent-indigo-hover);
    display: flex;
    align-items: center;
    gap: 8px;
}

.commentary-box h4::before {
    content: '📚';
    font-size: 0.9rem;
}

.commentary-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: justify;
}

.concepts-box {
    border-top: 1px dashed var(--border-glass);
    margin-top: 20px;
    padding-top: 20px;
}

.concepts-box h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--accent-gold);
    display: flex;
    align-items: center;
    gap: 8px;
}

.concepts-box h4::before {
    content: '💡';
    font-size: 0.9rem;
}

.concepts-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: justify;
    line-height: 1.6;
}

/* Debate Prompts List Styling */
.prompts-container h3 {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.prompts-intro {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.prompts-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.prompt-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.prompt-card:hover {
    border-color: var(--border-active-gold);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.prompt-card h4 {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.1rem;
    color: var(--accent-gold);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.prompt-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.prompt-card-action {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    opacity: 0;
    color: var(--accent-gold);
    transition: all var(--transition-fast);
}

.prompt-card:hover .prompt-card-action {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

/* Quick Notes Panel (Right) */
.quick-prep-panel {
    background-color: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: sticky;
    top: 96px; /* Topbar height + gap */
}

.quick-prep-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.quick-prep-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.quick-prep-header h3 i {
    width: 18px;
    height: 18px;
    color: var(--accent-indigo);
}

.save-status {
    font-size: 0.75rem;
    color: var(--accent-emerald);
    background-color: rgba(16, 185, 129, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.save-status.show {
    opacity: 1;
}

.quick-prep-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.quick-prep-panel textarea {
    height: 250px;
    font-size: 0.9rem;
}

/* ==========================================================================
   Debate Outline Workspace Components
   ========================================================================== */

.view-header {
    margin-bottom: 32px;
}

.view-header h2 {
    font-size: 1.8rem;
    font-family: 'Playfair Display', 'Nanum Myeongjo', serif;
    font-weight: 700;
    margin-bottom: 8px;
}

.view-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.debate-board-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
    align-items: start;
}

.debate-editor-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.editor-header-fields {
    display: flex;
    gap: 20px;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 24px;
    margin-bottom: 24px;
}

.editor-header-fields select {
    max-width: 160px;
}

/* Outline Builder Sections */
.outline-form {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-bottom: 32px;
}

.outline-section {
    border-left: 2px solid var(--bg-tertiary);
    padding-left: 20px;
    transition: border-color var(--transition-fast);
}

.outline-section:focus-within {
    border-left-color: var(--accent-indigo);
}

.outline-section .section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.outline-section .step-num {
    width: 22px;
    height: 22px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.outline-section:focus-within .step-num {
    background-color: var(--accent-indigo);
    color: white;
}

.outline-section h4 {
    font-size: 1.05rem;
    font-weight: 600;
}

.outline-section .section-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.outline-section textarea {
    min-height: 120px;
    font-size: 0.9rem;
}

.quote-helper-area {
    margin-bottom: 8px;
    color: var(--text-muted);
}

.editor-actions {
    display: flex;
    gap: 12px;
    border-top: 1px solid var(--border-glass);
    padding-top: 24px;
}

.editor-actions .btn-success {
    margin-left: auto;
}

/* Quotes Workspace sidebar */
.quotes-workspace {
    background-color: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: sticky;
    top: 96px;
}

.quotes-workspace-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.quotes-workspace-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.quotes-workspace-header h3 i {
    color: var(--accent-gold);
    width: 18px;
    height: 18px;
}

.workspace-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.quotes-list-box {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 4px;
}

.empty-quote-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    gap: 12px;
}

.empty-quote-state i {
    width: 32px;
    height: 32px;
    stroke-width: 1.5;
}

.empty-quote-state p {
    font-size: 0.85rem;
}

.collected-quote-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 16px;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

.collected-quote-item:hover {
    border-color: var(--border-active-gold);
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

.collected-quote-item p {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.collected-quote-item:hover p {
    -webkit-line-clamp: unset; /* Expand on hover */
}

.collected-quote-item .quote-source {
    font-size: 0.75rem;
    color: var(--accent-gold);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quote-remove-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.quote-remove-btn:hover {
    color: var(--accent-rose);
}

.quote-remove-btn i {
    width: 14px;
    height: 14px;
}

/* ==========================================================================
   Reflection Journal (Archive) Components
   ========================================================================== */

.journal-controls {
    margin-bottom: 24px;
}

.search-filter {
    position: relative;
    max-width: 320px;
}

.search-filter i,
.search-filter svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-filter input {
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 10px 16px 10px 44px;
    font-family: inherit;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.search-filter input:focus {
    outline: none;
    border-color: var(--accent-indigo);
}

.journal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.journal-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: all var(--transition-normal);
}

.journal-card:hover {
    border-color: var(--border-active-indigo);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.journal-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.journal-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.journal-tag.tag-justice { background-color: rgba(217, 119, 6, 0.15); color: var(--text-gold); }
.journal-tag.tag-friendship { background-color: rgba(99, 102, 241, 0.15); color: #818cf8; }
.journal-tag.tag-love { background-color: rgba(244, 63, 94, 0.15); color: #fb7185; }
.journal-tag.tag-freedom { background-color: rgba(16, 185, 129, 0.15); color: #34d399; }
.journal-tag.tag-death { background-color: rgba(107, 114, 128, 0.15); color: #d1d5db; }
.journal-tag.tag-happiness { background-color: rgba(234, 179, 8, 0.15); color: #fef08a; }

.journal-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.journal-card h3 {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.journal-preview {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.journal-actions {
    border-top: 1px solid var(--border-glass);
    padding-top: 16px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* Empty State for Archive */
.empty-archive-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 40px;
    background-color: var(--bg-glass);
    border: 1px dashed var(--border-glass);
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.empty-archive-state i {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    stroke-width: 1.2;
}

/* ==========================================================================
   Slide-out & Overlay Styling (Mobile/Quick Access)
   ========================================================================== */

.quotes-slideout {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 380px;
    max-width: 100vw;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-glass);
    z-index: 200;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.quotes-slideout.open {
    transform: translateX(0);
}

.slideout-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.slideout-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.slideout-header h3 i {
    color: var(--accent-gold);
}

.slideout-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 150;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.overlay.show {
    display: block;
    opacity: 1;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-active-gold);
    color: var(--text-primary);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    box-shadow: var(--shadow-lg);
    z-index: 300;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast::before {
    content: '✨';
}

/* ==========================================================================
   Responsive Adaptations (Mobile / Tablets)
   ========================================================================== */

@media (max-width: 1024px) {
    .explorer-body,
    .debate-board-layout {
        grid-template-columns: 1fr;
    }
    
    .quick-prep-panel,
    .quotes-workspace {
        position: static;
    }
}

@media (max-width: 768px) {
    .cat-count {
        display: none !important;
    }
    
    .tab-text-full {
        display: none !important;
    }
    .tab-text-short {
        display: inline !important;
    }
    
    .category-tabs {
        display: none !important;
    }

    /* Layout shift for mobile menu */
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .top-bar {
        padding: 0 20px;
    }
    
    .view-panel {
        padding: 24px 20px;
    }
    
    .welcome-header h2 {
        font-size: 1.7rem;
    }
    
    .concept-meta h2 {
        font-size: 2rem;
    }
    
    .tabs-nav {
        overflow-x: auto;
    }
    
    .tab-btn {
        padding: 14px 10px;
        font-size: 0.85rem;
        min-width: 110px;
    }
    
    .editor-header-fields {
        flex-direction: column;
        gap: 16px;
    }
    
    .editor-header-fields select {
        max-width: 100%;
    }
    
    .editor-actions {
        flex-direction: column;
    }
    
    .editor-actions .btn-success {
        margin-left: 0;
    }
    
    .toast {
        left: 20px;
        right: 20px;
        bottom: 20px;
        text-align: center;
        justify-content: center;
    }

    /* Mobile Readability Improvements */
    .reading-material p,
    .commentary-box p,
    .concepts-box p,
    .debate-opinion-text,
    .meta-value,
    .text-content p {
        word-break: keep-all;
        text-align: justify;
        line-height: 1.65;
        font-size: 0.95rem;
    }
    
    .reading-material blockquote {
        font-size: 1.05rem;
        padding: 16px 20px;
        margin: 16px 0;
        line-height: 1.6;
    }
    
    .view-panel {
        padding: 16px 14px;
    }
    
    .concepts-box {
        padding: 16px;
        margin-top: 20px;
    }
    
    .concepts-box h4 {
        font-size: 1.05rem;
        margin-bottom: 8px;
    }

    /* Mobile category tabs vertical layout */
    .category-tabs {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
        gap: 6px;
    }
    
    .cat-tab {
        justify-content: flex-start;
        padding: 10px 18px;
        font-size: 0.88rem;
        width: 100%;
        box-sizing: border-box;
    }

    /* Mobile dashboard keyword columns and rows vertical layout */
    .kw-all-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .kw-col,
    .kw-single-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 6px;
        padding: 8px;
    }
    
    .kw-row {
        padding: 6px 4px;
        gap: 4px;
    }
    
    .kw-kr {
        font-size: 0.84rem;
    }
    
    .kw-icon {
        width: 12px;
        height: 12px;
    }
}

/* PWA Installation Button */
.pwa-install-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.2) 0%, rgba(212, 175, 55, 0.05) 100%);
    border: 1px solid var(--accent-gold) !important;
    color: var(--accent-gold) !important;
    border-radius: 20px;
    padding: 5px 12px;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    vertical-align: middle;
    margin-left: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.1);
}

.pwa-install-btn:hover {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.35) 0%, rgba(212, 175, 55, 0.15) 100%);
    box-shadow: 0 0 18px rgba(212, 175, 55, 0.3);
    transform: translateY(-1px);
}

.pwa-install-btn i {
    margin-right: 5px;
    width: 14px;
    height: 14px;
}

/* PWA Modal Backdrop */
.pwa-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

/* PWA Modal Card */
.pwa-modal-card {
    background: var(--bg-card, #1e293b);
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
    border-radius: 16px;
    width: 90%;
    max-width: 420px;
    padding: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6), 0 0 20px rgba(212, 175, 55, 0.15);
    color: var(--text-primary, #f8fafc);
    animation: pwaFadeIn 0.3s ease-out;
}

@keyframes pwaFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.pwa-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
    padding-bottom: 0.75rem;
}

.pwa-modal-header h4 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-gold, #d4af37);
    display: flex;
    align-items: center;
}

.pwa-modal-close-btn {
    background: none;
    border: none;
    color: var(--text-muted, #94a3b8);
    font-size: 1.6rem;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.pwa-modal-close-btn:hover {
    color: var(--text-primary, #f8fafc);
}

.pwa-modal-body {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--text-primary, #f8fafc);
}

.pwa-modal-body p {
    margin: 0 0 1.25rem 0;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.05));
    border-radius: 8px;
    text-align: left;
}

.pwa-modal-body strong {
    color: var(--accent-gold, #d4af37);
}

.pwa-modal-footer {
    margin-top: 1.5rem;
    display: flex;
    justify-content: flex-end;
}

.btn-pwa-close {
    background: var(--accent-gold, #d4af37) !important;
    color: #0f172a !important;
    border: none !important;
    font-weight: 700 !important;
    padding: 8px 16px !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    transition: opacity 0.2s !important;
}

.btn-pwa-close:hover {
    opacity: 0.9 !important;
}