/* ========================================
   LEXICON - Vocabulary Learning App
   Aesthetic: Scholarly Elegance / Dark Academia
   ======================================== */

:root {
    /* Color Palette */
    --bg-primary: #0d0f12;
    --bg-secondary: #151820;
    --bg-card: #1a1d26;
    --bg-elevated: #22262f;

    --text-primary: #f5f2eb;
    --text-secondary: #a8a29e;
    --text-muted: #6b6661;

    --accent-gold: #d4a853;
    --accent-gold-light: #e8c078;
    --accent-gold-dark: #a67f3d;

    --success: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.1);
    --error: #f87171;
    --error-bg: rgba(248, 113, 113, 0.1);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);

    --border-subtle: rgba(245, 242, 235, 0.08);
    --border-accent: rgba(212, 168, 83, 0.3);

    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ========================================
   Base Styles
   ======================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Grain Overlay */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 9999;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 15, 18, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: var(--bg-primary);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.nav-link.active {
    color: var(--accent-gold);
    background: rgba(212, 168, 83, 0.1);
}

.nav-icon {
    display: flex;
    opacity: 0.7;
}

.nav-link.active .nav-icon {
    opacity: 1;
}

/* ========================================
   Main Content
   ======================================== */

.main-content {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
}

.page-transition {
    animation: fadeIn 0.4s ease;
}

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

/* ========================================
   Hero Section (Homepage)
   ======================================== */

.hero {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(212, 168, 83, 0.1);
    border: 1px solid var(--border-accent);
    color: var(--accent-gold);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
}

.title-accent {
    color: var(--accent-gold);
    font-style: italic;
}

.hero-description {
    max-width: 500px;
    margin: 0 auto var(--space-2xl);
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Stats Ring */
.stats-ring-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.stat-ring {
    position: relative;
    width: 140px;
    height: 140px;
}

.stat-ring svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.ring-bg {
    fill: none;
    stroke: var(--bg-elevated);
    stroke-width: 8;
}

.ring-progress {
    fill: none;
    stroke: var(--accent-gold);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s ease;
}

.stat-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Hero Actions */
.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-icon {
    display: flex;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.3);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

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

.btn-glow {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    100% { left: 100%; }
}

.btn-submit {
    width: 100%;
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-dark));
    color: var(--bg-primary);
    font-weight: 600;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.3);
}

.btn-text {
    flex: 1;
    text-align: center;
}

.btn-icon-right {
    display: flex;
    transition: transform var(--transition-fast);
}

.btn-submit:hover .btn-icon-right {
    transform: translateX(4px);
}

/* ========================================
   Features Section
   ======================================== */

.features-section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
    animation: slideUp 0.6s ease backwards;
    animation-delay: var(--delay);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
}

.feature-number {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--bg-elevated);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(212, 168, 83, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent-gold);
    margin-bottom: var(--space-md);
}

.feature-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    padding: var(--space-3xl) 0;
}

.cta-content {
    text-align: center;
    padding: var(--space-3xl);
    background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.cta-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.cta-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ========================================
   Page Hero (Subpages)
   ======================================== */

.page-hero {
    text-align: center;
    padding: var(--space-xl) 0 var(--space-2xl);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-2xl);
}

.page-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(212, 168, 83, 0.1);
    border: 1px solid var(--border-accent);
    color: var(--accent-gold);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-md);
}

.page-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    color: var(--text-secondary);
}

/* ========================================
   Form Styles
   ======================================== */

.form-card {
    max-width: 480px;
    margin: 0 auto var(--space-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.input-group {
    margin-bottom: var(--space-xl);
}

.input-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.input-wrapper {
    position: relative;
}

.input-wrapper input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-right: 48px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: var(--bg-elevated);
}

.input-icon {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.input-hint {
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Notifications */
.notification {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
}

.notification-success {
    background: var(--success-bg);
    border: 1px solid rgba(74, 222, 128, 0.2);
}

.notification-success .notification-icon {
    color: var(--success);
}

.notification-warning {
    background: var(--warning-bg);
    border: 1px solid rgba(251, 191, 36, 0.2);
}

.notification-warning .notification-icon {
    color: var(--warning);
}

.notification-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.notification-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.word-preview {
    margin: var(--space-md) 0;
}

.preview-word {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-gold);
}

.word-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.detail-row {
    display: flex;
    gap: var(--space-md);
    font-size: 0.9rem;
}

.detail-label {
    color: var(--text-muted);
    min-width: 60px;
}

.detail-value {
    color: var(--text-secondary);
}

.detail-definition {
    font-style: italic;
}

/* Tips Section */
.tips-section {
    max-width: 480px;
    margin: 0 auto;
}

.tips-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.tips-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tip-card {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.tip-icon {
    color: var(--success);
}

/* ========================================
   Word List
   ======================================== */

.list-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 320px;
}

.search-box input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-left: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

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

.search-icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.view-toggle {
    display: flex;
    gap: var(--space-xs);
}

.toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-normal);
}

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

.toggle-btn.active {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-primary);
}

/* Words Container - Grid View */
.words-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.word-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    animation: cardFadeIn 0.4s ease backwards;
    animation-delay: calc(var(--index) * 30ms);
}

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

.word-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.card-number {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.card-delete:hover {
    background: var(--error-bg);
    color: var(--error);
}

.card-body {
    padding: var(--space-lg);
}

.card-english {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: var(--space-sm);
}

.card-turkish {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.card-definition {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
    line-height: 1.5;
}

.card-footer {
    padding: var(--space-sm) var(--space-lg) var(--space-md);
}

.card-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-sm);
}

/* List View */
.words-container.list-view {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.words-container.list-view .word-card {
    display: flex;
    align-items: center;
    border-radius: var(--radius-md);
}

.words-container.list-view .card-header {
    border-bottom: none;
    padding: var(--space-md);
    min-width: 80px;
}

.words-container.list-view .card-body {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-md);
}

.words-container.list-view .card-english {
    font-size: 1.1rem;
    margin: 0;
    min-width: 150px;
}

.words-container.list-view .card-turkish {
    margin: 0;
    min-width: 120px;
}

.words-container.list-view .card-definition {
    flex: 1;
    margin: 0;
}

.words-container.list-view .card-footer {
    display: none;
}

/* No Results */
.no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    color: var(--text-muted);
}

.no-results-icon {
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.no-results-text {
    font-size: 0.95rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-3xl);
    background: var(--bg-card);
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius-lg);
}

.empty-icon {
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.empty-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* ========================================
   Quiz Page
   ======================================== */

.quiz-error {
    text-align: center;
    padding: var(--space-3xl);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.error-icon {
    color: var(--warning);
    margin-bottom: var(--space-lg);
    opacity: 0.7;
}

.error-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.error-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

/* Quiz Settings */
.quiz-settings {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.setting-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.setting-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    min-width: 120px;
}

.setting-options {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.setting-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.setting-btn:hover {
    border-color: var(--text-muted);
}

.setting-btn.active {
    background: rgba(212, 168, 83, 0.1);
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.setting-icon {
    font-weight: 700;
    font-size: 0.7rem;
}

/* Quiz Scoreboard */
.quiz-scoreboard {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
}

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

.score-icon {
    display: flex;
}

.score-correct .score-icon {
    color: var(--success);
}

.score-wrong .score-icon {
    color: var(--error);
}

.score-value {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
}

.score-correct .score-value {
    color: var(--success);
}

.score-wrong .score-value {
    color: var(--error);
}

.score-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.score-divider {
    width: 1px;
    height: 40px;
    background: var(--border-subtle);
}

/* Quiz Card */
.quiz-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.quiz-question-area {
    text-align: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-xl);
}

.question-type {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-md);
}

.question-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    line-height: 1.4;
    color: var(--text-primary);
}

.question-text.loading {
    color: var(--text-muted);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.option-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-normal);
}

.option-btn:hover:not(.correct):not(.wrong) {
    border-color: var(--accent-gold);
    background: var(--bg-elevated);
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.option-text {
    flex: 1;
}

.option-btn.correct {
    background: var(--success-bg);
    border-color: var(--success);
}

.option-btn.correct .option-letter {
    background: var(--success);
    color: var(--bg-primary);
}

.option-btn.wrong {
    background: var(--error-bg);
    border-color: var(--error);
}

.option-btn.wrong .option-letter {
    background: var(--error);
    color: var(--bg-primary);
}

/* Write Section */
.write-section {
    margin-bottom: var(--space-lg);
}

.write-input-wrapper {
    display: flex;
    gap: var(--space-sm);
}

.write-input-wrapper input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.write-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-gold);
}

.write-input-wrapper input::placeholder {
    color: var(--text-muted);
}

.btn-check {
    width: 52px;
    padding: 0;
    background: var(--accent-gold);
    color: var(--bg-primary);
}

.btn-check:hover {
    background: var(--accent-gold-light);
}

/* Quiz Feedback */
.quiz-feedback {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    margin-bottom: var(--space-lg);
}

.quiz-feedback.show {
    display: flex;
    animation: feedbackIn 0.3s ease;
}

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

.quiz-feedback.correct {
    background: var(--success-bg);
    color: var(--success);
}

.quiz-feedback.wrong {
    background: var(--error-bg);
    color: var(--error);
}

.feedback-icon {
    display: flex;
}

.feedback-text strong {
    color: var(--text-primary);
}

/* Next Button */
.btn-next {
    display: none;
    width: 100%;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-next:hover {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-primary);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    margin-top: auto;
    padding: var(--space-xl);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.footer-tagline {
    font-family: var(--font-display);
    font-size: 1rem;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
    margin: 0 auto;
}

/* ========================================
   Animations
   ======================================== */

.animate-in {
    animation: animateIn 0.5s ease;
}

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

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-md);
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-link span:not(.nav-icon) {
        display: none;
    }

    .nav-link {
        padding: var(--space-sm);
    }

    .main-content {
        padding: var(--space-lg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .options-grid {
        grid-template-columns: 1fr;
    }

    .quiz-scoreboard {
        gap: var(--space-md);
    }

    .score-value {
        font-size: 1.5rem;
    }

    .words-container.list-view .card-body {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .list-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: none;
    }

    .view-toggle {
        justify-content: center;
    }

    .setting-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .setting-options {
        width: 100%;
    }

    .setting-btn {
        flex: 1;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .form-card {
        padding: var(--space-lg);
    }

    .quiz-card {
        padding: var(--space-lg);
    }

    .question-text {
        font-size: 1.5rem;
    }
}

/* ========================================
   Card Actions (Edit & Delete)
   ======================================== */

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

.card-edit {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.card-edit:hover {
    background: rgba(212, 168, 83, 0.1);
    color: var(--accent-gold);
}

/* ========================================
   Modal Styles
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 480px;
    margin: var(--space-lg);
    transform: scale(0.95) translateY(20px);
    transition: var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-xl);
}

.modal-word {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
}

.modal-word-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.modal-word-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-gold);
}

.modal-body .input-group {
    margin-bottom: var(--space-lg);
}

.modal-body .input-group:last-child {
    margin-bottom: 0;
}

.modal-body textarea {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: vertical;
    min-height: 80px;
    transition: var(--transition-normal);
}

.modal-body textarea::placeholder {
    color: var(--text-muted);
}

.modal-body textarea:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: var(--bg-elevated);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--border-subtle);
}

.modal-footer .btn {
    min-width: 100px;
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast-notification {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1001;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition-normal);
}

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

.toast-notification.success {
    border-color: rgba(74, 222, 128, 0.3);
}

.toast-notification.success .toast-icon {
    color: var(--success);
}

.toast-notification.error {
    border-color: rgba(248, 113, 113, 0.3);
}

.toast-notification.error .toast-icon {
    color: var(--error);
}

.toast-icon {
    display: flex;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Toast responsive */
@media (max-width: 480px) {
    .toast-notification {
        left: var(--space-md);
        right: var(--space-md);
        bottom: var(--space-md);
    }

    .modal {
        margin: var(--space-md);
    }
}