/* ==========================================================================
   ÖjG Dil Atölyesi — Frontend Design System
   Principles: Distinctive, intentional, restrained motion, editorial typography
   ========================================================================== */

:root {
    /* Palette: Deep Obsidian, Warm Amber & Slate */
    --bg-canvas: #0b0d13;
    --bg-surface: #131722;
    --bg-surface-hover: #181d2b;
    --bg-subtle: #1a2030;
    --bg-accent-soft: rgba(245, 158, 11, 0.08);

    /* Borders */
    --border-hairline: rgba(255, 255, 255, 0.07);
    --border-subtle: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.2);
    --border-accent: rgba(245, 158, 11, 0.35);

    /* Typography Colors */
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --text-inverse: #0B0D13;

    /* Intentional Accents */
    --accent-amber: #F59E0B;
    --accent-amber-hover: #D97706;
    --accent-green: #10B981;
    --accent-green-soft: rgba(16, 185, 129, 0.12);
    --accent-red: #EF4444;
    --accent-red-soft: rgba(239, 68, 68, 0.12);
    --accent-indigo: #6366F1;

    /* Typography */
    --font-ui: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Newsreader', Georgia, Cambria, serif;

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-pill: 9999px;

    /* Layout */
    --sidebar-width: 250px;
}

/* ===== Base & Reset ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.95rem;
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Layout Structure ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: #0e111a;
    border-right: 1px solid var(--border-hairline);
    display: flex;
    flex-direction: column;
    z-index: 50;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-hairline);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: var(--accent-amber);
    color: var(--text-inverse);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.5px;
}

.logo-details {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

.logo-tagline {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.nav-section {
    padding: 20px 14px 10px;
    flex: 1;
}

.nav-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    padding: 0 10px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    text-align: left;
    margin-bottom: 2px;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--bg-subtle);
    color: var(--text-primary);
    font-weight: 600;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-hairline);
}

.streak-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg-accent-soft);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-md);
}

.streak-fire {
    font-size: 1.25rem;
}

.streak-count {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-amber);
}

.streak-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Mobile Toggle */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 100;
    width: 40px;
    height: 40px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.mobile-nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
}

/* ===== Main Canvas ===== */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 40px 48px;
    max-width: 1040px;
    min-height: 100vh;
}

/* Page Switching */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-hairline);
    gap: 20px;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.page-subtitle {
    font-size: 0.92rem;
    color: var(--text-secondary);
    max-width: 620px;
}

.header-stats {
    display: flex;
    gap: 12px;
}

.stat-pill {
    display: flex;
    align-items: baseline;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
}

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

.stat-value {
    font-weight: 700;
    color: var(--accent-amber);
}

.stat-unit {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Section Titles */
.section-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 32px 0 16px;
    letter-spacing: -0.2px;
}

/* ===== XP Progress Ribbon ===== */
.xp-progress-section {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    margin-bottom: 28px;
}

.xp-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.xp-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-pill);
    overflow: hidden;
}

.xp-fill {
    height: 100%;
    background: var(--accent-amber);
    border-radius: var(--radius-pill);
    transition: width 0.4s ease;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 20px 18px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: border-color 0.15s ease;
}

.stat-card:hover {
    border-color: var(--border-subtle);
}

.stat-card-icon {
    font-size: 1.25rem;
    margin-bottom: 2px;
}

.stat-card-value {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.stat-card-label {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ===== Quick Action Deck ===== */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.action-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    color: inherit;
    text-align: left;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.action-card:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-subtle);
}

.action-card:active {
    transform: translateY(1px);
}

.action-icon {
    font-size: 1.4rem;
    width: 44px;
    height: 44px;
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.action-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.action-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.action-arrow {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: transform 0.15s ease, color 0.15s ease;
}

.action-card:hover .action-arrow {
    transform: translateX(4px);
    color: var(--accent-amber);
}

/* ===== Daily Word Card (Oxford Style) ===== */
.daily-word-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-left: 4px solid var(--accent-amber);
    border-radius: var(--radius-md);
    padding: 28px 32px;
    margin-top: 16px;
    position: relative;
    cursor: pointer;
    transition: background 0.15s ease;
}

.daily-word-card:hover {
    background: var(--bg-surface-hover);
}

.daily-word-badge {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--accent-amber);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.daily-word {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.daily-pronunciation {
    font-family: var(--font-ui);
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.daily-meaning {
    font-size: 1.05rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 10px;
}

.daily-example {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Category Tabs ===== */
.category-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-hairline);
    padding-bottom: 12px;
    overflow-x: auto;
}

.cat-tab {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.cat-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.cat-tab.active {
    background: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--border-subtle);
    font-weight: 600;
}

/* ===== Flashcard Engine ===== */
.flashcard-area {
    max-width: 580px;
    margin: 20px auto 0;
}

.flashcard-progress {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.fc-progress-bar {
    height: 4px;
    background: var(--bg-subtle);
    border-radius: var(--radius-pill);
    overflow: hidden;
    margin-top: 8px;
}

.fc-progress-fill {
    height: 100%;
    background: var(--accent-amber);
    transition: width 0.3s ease;
}

.flashcard-container {
    perspective: 1000px;
    margin-bottom: 24px;
}

.flashcard {
    min-height: 300px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
    position: relative;
}

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

.flashcard-front, .flashcard-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 36px 32px;
    text-align: center;
}

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

.fc-word {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.fc-pronunciation {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.fc-meaning {
    font-family: var(--font-ui);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-amber);
    margin-bottom: 12px;
}

.fc-example {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 440px;
}

.fc-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: auto;
}

.flashcard-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
}

.fc-btn {
    flex: 1;
    padding: 13px 20px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.fc-btn:active {
    transform: translateY(1px);
}

.fc-btn-wrong {
    background: transparent;
    color: var(--text-secondary);
}

.fc-btn-wrong:hover {
    background: var(--accent-red-soft);
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.fc-btn-right {
    background: var(--accent-amber);
    color: var(--text-inverse);
    border-color: var(--accent-amber);
}

.fc-btn-right:hover {
    background: var(--accent-amber-hover);
}

/* Results Shared */
.results-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 44px 32px;
    text-align: center;
    max-width: 480px;
    margin: 40px auto;
}

.results-emoji {
    font-size: 3rem;
    margin-bottom: 16px;
}

.results-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.results-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 28px;
}

.result-stat {
    display: flex;
    flex-direction: column;
}

.result-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-amber);
}

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

/* Primary Button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--accent-amber);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease;
}

.btn-primary:hover {
    background: var(--accent-amber-hover);
}

.btn-primary:active {
    transform: translateY(1px);
}

/* ===== Quiz View ===== */
.quiz-types {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.quiz-type-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    cursor: pointer;
    text-align: left;
    color: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.quiz-type-card:hover {
    border-color: var(--border-subtle);
    background: var(--bg-surface-hover);
}

.quiz-type-card .qt-icon {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.quiz-type-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.quiz-type-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.quiz-area {
    max-width: 680px;
    margin: 0 auto;
}

.quiz-header {
    margin-bottom: 20px;
}

.quiz-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.quiz-progress-bar {
    height: 4px;
    background: var(--bg-subtle);
    border-radius: var(--radius-pill);
    overflow: hidden;
    margin-bottom: 12px;
}

.quiz-progress-fill {
    height: 100%;
    background: var(--accent-amber);
    transition: width 0.3s ease;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.quiz-question-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    margin-bottom: 20px;
    text-align: center;
}

.quiz-question {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    line-height: 1.5;
    font-weight: 500;
    color: var(--text-primary);
}

.quiz-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Quiz Options */
.quiz-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.quiz-option {
    padding: 16px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
}

.quiz-option:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-subtle);
}

.quiz-option:active {
    transform: translateY(1px);
}

.quiz-option.correct {
    background: var(--accent-green-soft);
    border-color: var(--accent-green);
    color: var(--accent-green);
    font-weight: 600;
}

.quiz-option.wrong {
    background: var(--accent-red-soft);
    border-color: var(--accent-red);
    color: var(--accent-red);
    font-weight: 600;
}

.quiz-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

/* Fill Input */
.quiz-fill {
    text-align: center;
    margin-bottom: 20px;
}

.fill-input {
    width: 100%;
    max-width: 380px;
    padding: 14px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 1.05rem;
    outline: none;
    margin-bottom: 14px;
    transition: border-color 0.15s ease;
}

.fill-input:focus {
    border-color: var(--accent-amber);
}

.fill-input.correct {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.fill-input.wrong {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

/* True False */
.quiz-tf {
    display: flex;
    gap: 14px;
    justify-content: center;
    margin-bottom: 20px;
}

.tf-btn {
    padding: 16px 40px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.tf-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-strong);
}

/* Quiz Feedback Box */
.quiz-feedback {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin-bottom: 20px;
}

.quiz-feedback.correct-feedback {
    border-left: 4px solid var(--accent-green);
}

.quiz-feedback.wrong-feedback {
    border-left: 4px solid var(--accent-red);
}

/* ===== Reading Section (Editorial Focus) ===== */
.reading-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 16px;
}

.reading-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 24px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.reading-card:hover {
    border-color: var(--border-subtle);
    background: var(--bg-surface-hover);
}

.reading-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.reading-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.reading-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.level-badge {
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    font-weight: 600;
}

.level-easy { background: var(--accent-green-soft); color: var(--accent-green); }
.level-medium { background: var(--bg-accent-soft); color: var(--accent-amber); }
.level-hard { background: var(--accent-red-soft); color: var(--accent-red); }

.completed-badge {
    color: var(--accent-green);
    font-weight: 600;
}

/* Reading Article */
.back-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    cursor: pointer;
    margin-bottom: 20px;
    transition: all 0.15s ease;
}

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

.reading-article {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    margin-bottom: 28px;
}

.reading-article h2 {
    font-family: var(--font-serif);
    font-size: 1.85rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 10px;
}

.reading-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-hairline);
}

.reading-text {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    line-height: 1.85;
    color: #cbd5e1;
    max-width: 68ch; /* Optimal editorial line length */
}

.reading-text p {
    margin-bottom: 18px;
}

/* Reading Questions */
.reading-questions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.rq-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 22px 24px;
}

.rq-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 14px;
}

.rq-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rq-option {
    padding: 12px 16px;
    background: var(--bg-subtle);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.88rem;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
}

.rq-option:hover {
    border-color: var(--border-subtle);
    color: var(--text-primary);
}

.rq-option.correct {
    background: var(--accent-green-soft);
    border-color: var(--accent-green);
    color: var(--accent-green);
    font-weight: 600;
}

.rq-option.wrong {
    background: var(--accent-red-soft);
    border-color: var(--accent-red);
    color: var(--accent-red);
    font-weight: 600;
}

.rq-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

/* ===== Everyday Phrases ===== */
.phrase-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.phrase-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    gap: 18px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.phrase-card:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-subtle);
}

.phrase-emoji {
    font-size: 1.5rem;
}

.phrase-content {
    flex: 1;
}

.phrase-en {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.phrase-tr {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.phrase-pronunciation {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-ui);
    margin-top: 2px;
}

.phrase-speak-btn {
    width: 36px;
    height: 36px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-hairline);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.phrase-speak-btn:hover {
    color: var(--accent-amber);
    border-color: var(--accent-amber);
}

/* ===== Achievements Grid ===== */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}

.achievement-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-hairline);
    border-radius: var(--radius-md);
    padding: 22px 20px;
    text-align: center;
}

.achievement-card.locked {
    opacity: 0.45;
}

.achievement-card.unlocked {
    border-color: var(--border-accent);
}

.achievement-icon {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.achievement-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.achievement-card p {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.achievement-progress {
    height: 4px;
    background: var(--bg-subtle);
    border-radius: var(--radius-pill);
    overflow: hidden;
}

.achievement-progress-fill {
    height: 100%;
    background: var(--accent-amber);
}

/* ===== XP Floating Toast ===== */
.xp-popup {
    position: fixed;
    top: 28px;
    right: 28px;
    background: var(--accent-amber);
    color: var(--text-inverse);
    padding: 10px 18px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 0.95rem;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    pointer-events: none;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.xp-popup.show {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Level Up Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    text-align: center;
    max-width: 380px;
    width: 90%;
}

.levelup-stars {
    font-size: 2rem;
    margin-bottom: 12px;
}

.levelup-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.levelup-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-amber);
    line-height: 1;
    margin: 12px 0 16px;
}

.levelup-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 22px;
}

/* Utility */
.hidden {
    display: none !important;
}

/* ===== Responsive Breakpoints ===== */
@media (max-width: 960px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .quiz-types {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-nav-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: 24px 18px;
        padding-top: 68px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

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

    .daily-word {
        font-size: 1.8rem;
    }
}