/* Pinnacle Languages - Complete Stylesheet */

:root {
    --primary-color: #6366F1;
    --primary-hover: #4F46E5;
    --primary-light: #EEF2FF;
    --accent-color: #8B5CF6;
    --accent-hover: #7C3AED;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --white: #FFFFFF;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 20px; border: none; border-radius: var(--radius);
    font-size: 14px; font-weight: 500; cursor: pointer;
    text-decoration: none; transition: all 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-hover); box-shadow: var(--shadow-md); }

.btn-secondary { background: var(--white); color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-secondary:hover { background: var(--gray-50); border-color: var(--gray-400); }

.btn-accent { background: var(--accent-color); color: white; }
.btn-accent:hover { background: var(--accent-hover); box-shadow: var(--shadow-md); }

.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-800); }

.btn-large { padding: 14px 28px; font-size: 16px; border-radius: var(--radius-lg); }
.btn-small { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; }

/* ===== LANDING PAGE ===== */
.landing-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #F5F3FF 0%, #EEF2FF 50%, #E0E7FF 100%);
    overflow-x: hidden;
}

.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-header {
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.landing-header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-logo, .auth-logo, .languages-page-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--gray-900);
    font-weight: 700;
    font-size: 20px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

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

.user-greeting {
    color: var(--gray-600);
    font-size: 14px;
}

.landing-main {
    flex: 1;
    padding: 0 24px;
}

/* Hero Section */
.hero-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.mission-banner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    margin-bottom: 32px;
}

.mission-banner p {
    font-size: 15px;
    color: var(--gray-700);
    line-height: 1.7;
    margin: 0;
}

.mission-banner strong {
    color: var(--primary-color);
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 24px;
    padding-bottom: 4px;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.hero-languages {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hero-language {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--gray-50);
    border-radius: var(--radius);
    font-weight: 500;
    color: var(--gray-700);
}

.hero-language .flag {
    font-size: 24px;
}

.hero-language-more {
    padding: 12px 20px;
    text-align: center;
    color: var(--primary-color);
    font-weight: 600;
}

/* Features Section */
.features-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 15px;
    line-height: 1.6;
}

/* Mission Section */
.mission-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 0;
    text-align: center;
}

.mission-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.mission-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 20px;
}

.mission-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.mission-content p {
    font-size: 17px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 24px;
}

/* Landing Footer */
.landing-footer {
    padding: 24px;
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
}

/* ===== AUTH PAGES (Login/Register) ===== */
.auth-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #F5F3FF 0%, #EEF2FF 50%, #E0E7FF 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-container {
    display: flex;
    max-width: 900px;
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.auth-card {
    flex: 1;
    padding: 48px;
    display: flex;
    flex-direction: column;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    display: inline-flex;
    margin-bottom: 24px;
}

.auth-logo .logo-icon {
    width: 56px;
    height: 56px;
}

.auth-logo .logo-icon svg {
    width: 32px;
    height: 32px;
}

.auth-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--gray-500);
    font-size: 15px;
}

.auth-error {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: #FEF2F2;
    border: 1px solid #FEE2E2;
    border-radius: var(--radius);
    color: var(--danger-color);
    font-size: 14px;
    margin-bottom: 24px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 15px;
    transition: all 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-group input::placeholder {
    color: var(--gray-400);
}

.auth-footer {
    margin-top: 24px;
    text-align: center;
    color: var(--gray-600);
    font-size: 14px;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.auth-success {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: #ECFDF5;
    border: 1px solid #A7F3D0;
    border-radius: var(--radius);
    color: #065F46;
    font-size: 14px;
    margin-bottom: 24px;
}

.subscribe-plan {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
}

.plan-price {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.plan-period {
    font-size: 16px;
    color: var(--gray-500);
    margin-bottom: 24px;
}

.plan-features {
    list-style: none;
    text-align: left;
    margin: 0 0 24px 0;
    padding: 0;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--gray-700);
    font-size: 15px;
}

.plan-features li svg {
    color: var(--success-color);
    flex-shrink: 0;
}

.subscribe-note {
    margin-top: 20px;
    font-size: 13px;
    color: var(--gray-500);
    text-align: center;
}

.auth-decoration {
    width: 320px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
}

.decoration-content {
    text-align: center;
    color: white;
}

.decoration-content h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.decoration-content p {
    font-size: 16px;
    opacity: 0.9;
    line-height: 1.6;
}

/* ===== LANGUAGES PAGE ===== */
.languages-page {
    min-height: 100vh;
    background: var(--gray-50);
}

.languages-page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.languages-page-header {
    padding: 16px 24px;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.languages-page-header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.languages-page-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-email {
    color: var(--gray-500);
    font-size: 14px;
}

.languages-page-main {
    flex: 1;
    padding: 0 24px 48px;
}

.languages-page-hero {
    max-width: 1400px;
    margin: 0 auto;
    padding: 48px 0 32px;
    text-align: center;
}

.languages-page-hero h1 {
    font-size: 40px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.languages-page-hero > p {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.subscription-notice {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
    padding: 12px 20px;
    background: #FEF3C7;
    border: 1px solid #FDE68A;
    border-radius: var(--radius);
    color: #92400E;
    font-size: 14px;
}

.languages-grid-container {
    max-width: 1400px;
    margin: 0 auto;
}

.languages-search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto 40px;
    padding: 12px 20px;
    background: white;
    border: 1px solid var(--gray-300);
    border-radius: 100px;
    box-shadow: var(--shadow-sm);
}

.languages-search-bar svg {
    color: var(--gray-400);
    flex-shrink: 0;
}

.languages-search-bar input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    color: var(--gray-800);
}

.languages-search-bar input::placeholder {
    color: var(--gray-400);
}

.languages-grid {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.languages-loading, .languages-error, .languages-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.languages-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.language-region {
    margin-bottom: 24px;
}

.region-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-200);
}

.region-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.language-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.language-flag {
    font-size: 28px;
    line-height: 1;
}

.language-name {
    flex: 1;
    font-weight: 500;
    color: var(--gray-800);
}

.language-arrow {
    color: var(--gray-400);
    transition: transform 0.2s ease;
}

.language-card:hover .language-arrow {
    transform: translateX(4px);
    color: var(--primary-color);
}

.languages-page-footer {
    padding: 24px;
    text-align: center;
    color: var(--gray-500);
    font-size: 14px;
    border-top: 1px solid var(--gray-200);
    background: white;
}

/* ===== APP STYLES (FSI Learning Interface) ===== */
.app-container { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

body:has(.app-container) {
    overflow: hidden;
    height: 100vh;
}

.app-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; height: 56px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: white; flex-shrink: 0;
}

.app-title { font-size: 18px; font-weight: 600; }

.header-left, .header-right {
    display: flex; align-items: center; gap: 12px;
}

.app-back-link {
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; border-radius: 6px;
    color: white; text-decoration: none;
    background: rgba(255,255,255,0.1); transition: background 0.15s;
}
.app-back-link:hover { background: rgba(255,255,255,0.2); }

.user-email-small {
    font-size: 13px; color: rgba(255,255,255,0.8);
}

.header-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border: 1px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.1); color: white;
    border-radius: 6px; cursor: pointer; font-size: 14px; transition: background 0.15s;
    text-decoration: none;
}
.header-btn:hover { background: rgba(255,255,255,0.2); }

/* Report A Problem Modal */
.report-modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5);
    z-index: 2000; display: flex; align-items: center; justify-content: center;
}
.report-modal {
    background: white; border-radius: 12px; width: 440px; max-width: 92vw;
    box-shadow: 0 12px 40px rgba(0,0,0,0.25); overflow: hidden;
}
.report-modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; background: var(--primary-color); color: white;
}
.report-modal-header h3 { margin: 0; font-size: 18px; }
.report-modal-close {
    background: none; border: none; color: white; font-size: 24px;
    cursor: pointer; line-height: 1; padding: 0 4px;
}
.report-modal-close:hover { opacity: 0.7; }
.report-modal-body {
    padding: 20px; display: flex; flex-direction: column; gap: 10px;
}
.report-modal-body label {
    font-weight: 600; font-size: 14px; color: var(--gray-700); margin-top: 4px;
}
.report-modal-body input,
.report-modal-body textarea {
    padding: 10px 12px; border: 1px solid var(--gray-300); border-radius: 6px;
    font-size: 14px; font-family: inherit; resize: vertical;
}
.report-modal-body input:focus,
.report-modal-body textarea:focus {
    outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
.report-submit-btn {
    margin-top: 8px; padding: 12px; background: var(--primary-color); color: white;
    border: none; border-radius: 6px; font-size: 15px; font-weight: 600;
    cursor: pointer; transition: background 0.15s;
}
.report-submit-btn:hover { background: var(--primary-hover); }
.report-submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Thank-you toast */
.report-toast {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: white; padding: 32px 40px; border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.25); z-index: 2001;
    text-align: center; max-width: 400px;
}
.report-toast h3 { margin: 0 0 10px; color: var(--primary-color); }
.report-toast p { margin: 0; color: var(--gray-600); font-size: 15px; line-height: 1.5; }
.report-toast-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.3); z-index: 2000;
}

.app-main { flex: 1; overflow: hidden; display: flex; }
.app-screen { flex: 1; display: flex; overflow: hidden; }

.panel-hidden { display: none !important; }
.text-muted { color: var(--gray-500); }

/* Languages Layout */
.languages-layout { display: flex; flex: 1; height: 100%; overflow: hidden; }

.languages-left {
    width: 280px; min-width: 200px; max-width: 400px;
    background: var(--gray-50); border-right: 1px solid var(--gray-200);
    display: flex; flex-direction: column; transition: width 0.2s ease;
}
.languages-left.collapsed { width: 48px; min-width: 48px; }
.languages-left.collapsed .languages-nav-content { display: none; }
.languages-left.collapsed .languages-nav-header h3 { display: none; }

.languages-nav-header {
    display: flex; align-items: center; gap: 8px; padding: 12px 16px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6); color: white;
}
.languages-nav-header h3 { margin: 0; font-size: 16px; font-weight: 600; white-space: nowrap; }

.languages-collapse-btn {
    width: 24px; height: 24px; border: none;
    background: rgba(255, 255, 255, 0.2); border-radius: 4px;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    color: white; transition: background 0.15s; flex-shrink: 0;
}
.languages-collapse-btn:hover { background: rgba(255, 255, 255, 0.3); }
.languages-left.collapsed .languages-collapse-btn .collapse-icon { transform: rotate(180deg); }

.languages-nav-content { flex: 1; overflow-y: auto; padding: 16px; }

.languages-selector, .languages-course-selector { margin-bottom: 16px; }
.languages-selector label, .languages-course-selector label {
    display: block; font-size: 12px; font-weight: 600; color: var(--gray-500);
    text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px;
}
.languages-selector select, .languages-course-selector select {
    width: 100%; padding: 8px 12px; border: 1px solid var(--gray-300);
    border-radius: 6px; font-size: 14px; background: white; cursor: pointer;
}
.languages-selector select:focus, .languages-course-selector select:focus {
    outline: none; border-color: #6366F1; box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.languages-unit-list { display: flex; flex-direction: column; gap: 6px; }
.languages-unit-item {
    padding: 10px 12px; background: white; border: 1px solid var(--gray-200);
    border-radius: 6px; cursor: pointer; transition: all 0.15s;
}
.languages-unit-item:hover { border-color: #6366F1; background: #F5F3FF; }
.languages-unit-item.active { background: #6366F1; border-color: #6366F1; color: white; }
.languages-unit-item .unit-number { font-size: 11px; font-weight: 600; text-transform: uppercase; opacity: 0.7; margin-bottom: 2px; }
.languages-unit-item .unit-title { font-size: 13px; font-weight: 500; }

.languages-resizer { width: 4px; background: var(--gray-200); cursor: col-resize; transition: background 0.15s; }
.languages-resizer:hover, .languages-resizer.resizing { background: #6366F1; }

.languages-right { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: white; }

.languages-lesson-placeholder { flex: 1; display: flex; align-items: center; justify-content: center; }
.languages-lesson-placeholder .placeholder-content { text-align: center; color: var(--gray-500); }
.languages-lesson-placeholder .placeholder-content p { margin: 12px 0 4px 0; font-size: 16px; }

.languages-lesson-content { flex: 1; overflow-y: auto; padding: 24px; }

.languages-lesson-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--gray-200);
}
.languages-lesson-header h2 { margin: 0; font-size: 22px; color: var(--gray-800); }
.languages-lesson-actions { display: flex; gap: 8px; }
.languages-lesson-actions .btn { display: inline-flex; align-items: center; gap: 6px; }

/* Audio Section */
.languages-audio-section { margin-bottom: 32px; }
.languages-audio-section h4, .languages-ai-section h4 {
    margin: 0 0 12px 0; font-size: 14px; font-weight: 600; color: var(--gray-700);
    text-transform: uppercase; letter-spacing: 0.5px;
}
.languages-audio-list { display: flex; flex-direction: column; gap: 12px; }
.languages-audio-item {
    display: flex; align-items: center; gap: 12px; padding: 12px 16px;
    background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: 8px;
}
.languages-audio-item .audio-info { flex: 1; min-width: 0; }
.languages-audio-item .audio-title { font-size: 14px; font-weight: 500; color: var(--gray-800); margin: 0 0 2px 0; }
.languages-audio-item .audio-duration { font-size: 12px; color: var(--gray-500); }
.languages-audio-item .audio-play-btn {
    width: 40px; height: 40px; border: none; background: #6366F1; color: white;
    border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: background 0.15s, transform 0.1s; flex-shrink: 0;
}
.languages-audio-item .audio-play-btn:hover { background: #4F46E5; transform: scale(1.05); }
.languages-audio-item .audio-play-btn.playing { background: #EF4444; }
.languages-audio-item .audio-rewind-btn {
    width: 32px; height: 32px; border: none; background: #9CA3AF; color: white;
    border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: background 0.15s, transform 0.1s; flex-shrink: 0; margin-left: 4px;
}
.languages-audio-item .audio-rewind-btn:hover { background: #6B7280; transform: scale(1.05); }
.languages-audio-item.active { background: #EEF2FF; border-color: #6366F1; }

/* AI Practice Section */
.languages-ai-section {
    padding: 20px; background: linear-gradient(135deg, #F5F3FF, #EEF2FF);
    border-radius: 12px; border: 1px solid #E0E7FF;
}
.languages-ai-section p { margin: 0 0 16px 0; font-size: 14px; }
.languages-ai-section .btn { display: inline-flex; align-items: center; gap: 8px; }
.languages-pdf-hint { font-size: 13px; margin: 0 0 12px 0; }

/* Transcript Section */
.languages-transcript-section { margin-bottom: 32px; }
.languages-transcript-section h4 {
    margin: 0; font-size: 14px; font-weight: 600; color: var(--gray-700);
    text-transform: uppercase; letter-spacing: 0.5px;
    white-space: nowrap;
    flex-shrink: 0;
}
.transcript-header-bar {
    display: flex !important;
    flex-direction: row !important;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    padding: 8px 12px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
}
.transcript-header-bar h4 {
    margin: 0;
    flex-shrink: 0;
}
.transcript-tools-bar {
    display: flex !important;
    visibility: visible !important;
    flex-direction: row !important;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
}
.transcript-tools-bar .tool-btn {
    display: inline-flex !important;
    visibility: visible !important;
    padding: 4px 8px;
    font-size: 11px;
    gap: 3px;
}
.transcript-tools-bar .tool-btn svg {
    width: 12px;
    height: 12px;
}
#languagesTranscriptRefresh {
    margin-left: auto;
    flex-shrink: 0;
}
.transcript-controls { display: flex; align-items: center; gap: 12px; }
.languages-transcript-container {
    background: #fff; border: 1px solid var(--gray-300); border-radius: 8px;
    min-height: 200px; max-height: 400px; overflow-y: auto; padding: 16px;
}
.transcript-placeholder {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 150px; text-align: center; color: var(--gray-500);
}
.transcript-loading {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 150px; color: var(--gray-600);
}
.transcript-loading::before {
    content: ''; width: 24px; height: 24px; border: 3px solid var(--gray-300);
    border-top-color: var(--primary-color); border-radius: 50%;
    animation: spin 0.8s linear infinite; margin-bottom: 12px;
}
.transcript-content { line-height: 1.8; display: block; }
.transcript-line { display: block; padding: 8px 12px; margin: 4px 0; border-radius: 6px; transition: background-color 0.2s; }
.transcript-line:hover { background-color: var(--gray-100); }
.transcript-original { display: block; font-size: 16px; color: var(--gray-900); font-weight: 500; }
.transcript-translation { display: block; font-size: 14px; color: var(--gray-600); font-style: italic; margin-top: 4px; }
.languages-transcript-container .transcript-translation { display: none; }
.languages-transcript-container.show-translation .transcript-translation { display: block; }
.transcript-error { color: var(--danger-color); text-align: center; padding: 20px; }
.transcript-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px; }
.transcript-status {
    display: block; padding: 16px;
    background: var(--gray-50); border-radius: 8px; color: var(--gray-600); font-size: 14px;
    text-align: center;
}
.transcript-status .status-indicator { display: inline-block; width: 10px; height: 10px; border-radius: 50%; vertical-align: middle; margin-right: 8px; }
.transcript-status .status-message { display: block; font-weight: 600; color: var(--gray-700); font-size: 16px; margin-bottom: 8px; }
.transcript-status .status-submessage { display: block; color: var(--gray-500); font-size: 13px; line-height: 1.5; }
.status-indicator.listening { background: #10B981; animation: pulse-green 1.5s ease-in-out infinite; }
@keyframes pulse-green { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.2); } }

/* Word-sync status indicator */
.word-sync-status {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    margin-right: 8px;
}
.word-sync-status.active {
    background-color: #D1FAE5;
    color: #065F46;
}
.word-sync-status.inactive {
    background-color: #FEF3C7;
    color: #92400E;
}

/* Word-level transcript sync highlighting */
.transcript-words {
    line-height: 2;
    word-spacing: 2px;
}
.transcript-word {
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: all 0.15s ease;
    display: inline;
}
.transcript-word:hover {
    background-color: var(--gray-200);
}
.transcript-word.word-active {
    background-color: #FEF08A;
    color: #854D0E;
    font-weight: 600;
    transform: scale(1.02);
    box-shadow: 0 2px 8px rgba(254, 240, 138, 0.5);
}
.transcript-word.word-spoken {
    color: var(--gray-500);
}
.transcript-synced {
    max-height: 300px;
    overflow-y: auto;
    scroll-behavior: smooth;
}
@keyframes word-highlight {
    0% { background-color: #FEF08A; }
    100% { background-color: transparent; }
}

/* Chat Panel - Floating Windows */
.chat-panel.chat-floating {
    position: fixed; width: 380px; height: 520px; background: white;
    border-radius: var(--radius-lg); display: flex; flex-direction: column;
    z-index: 1000; box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    border: 1px solid var(--gray-200); overflow: hidden;
}
#generalChatPanel { right: 420px; bottom: 20px; }
#practiceChatPanel { right: 20px; bottom: 20px; width: 440px; }
.chat-panel.chat-focused { z-index: 1001; }
.chat-drag-handle { cursor: grab; user-select: none; }
.chat-drag-handle.dragging { cursor: grabbing; }
.chat-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; background: linear-gradient(135deg, #6366F1, #8B5CF6); color: white;
}
.chat-header h3 { margin: 0; font-size: 16px; font-weight: 600; }
.chat-close-btn {
    width: 32px; height: 32px; border: none; background: rgba(255,255,255,0.2); color: white;
    border-radius: 4px; cursor: pointer; font-size: 20px; display: flex; align-items: center; justify-content: center;
}
.chat-close-btn:hover { background: rgba(255,255,255,0.3); }
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 12px; }
.chat-message { max-width: 85%; padding: 10px 14px; border-radius: 12px; font-size: 14px; line-height: 1.5; }
.chat-message p { margin: 0; }
.bot-message { background: var(--gray-100); color: var(--gray-800); align-self: flex-start; border-bottom-left-radius: 4px; }
.user-message { background: var(--primary-color); color: white; align-self: flex-end; border-bottom-right-radius: 4px; }
.bot-message .translation-block { color: var(--gray-400); font-size: 0.85em; font-style: italic; margin-top: 10px; padding-top: 6px; border-top: 1px solid var(--gray-200); }
.chat-input-area { display: flex; gap: 8px; padding: 16px 20px; border-top: 1px solid var(--gray-200); }
.chat-input-area input {
    flex: 1; padding: 10px 14px; border: 1px solid var(--gray-300);
    border-radius: 8px; font-size: 14px; outline: none;
}
.chat-input-area input:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15); }

/* Voice Control Buttons */
.chat-input-area .btn-voice {
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-500);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.chat-input-area .btn-voice:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}
.chat-input-area .btn-voice svg {
    width: 18px;
    height: 18px;
}

/* Microphone button - listening state */
.chat-input-area .btn-mic.listening {
    background: #EF4444;
    border-color: #EF4444;
    color: white;
    animation: pulse-mic 1s ease-in-out infinite;
}
@keyframes pulse-mic {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Speaker button - speaking state */
.chat-input-area .btn-speak.speaking {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    animation: pulse-speak 1s ease-in-out infinite;
}
@keyframes pulse-speak {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Speaker button - auto-speak ON state (default) */
.chat-input-area .btn-speak.auto-speak-on {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Speaker button - auto-speak off state */
.chat-input-area .btn-speak.auto-speak-off {
    background: var(--gray-200);
    color: var(--gray-400);
    opacity: 0.6;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 60px 0;
    }

    .hero-title { font-size: 42px; }

    .hero-actions { justify-content: center; }

    .hero-visual { order: -1; }

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

    .auth-decoration { display: none; }
}

@media (max-width: 768px) {
    .landing-header-content { flex-direction: column; gap: 16px; }

    .landing-nav { width: 100%; justify-content: center; }

    .hero-title { font-size: 32px; }

    .hero-subtitle { font-size: 16px; }

    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }

    .mission-content { padding: 32px 24px; }
    .mission-content h2 { font-size: 24px; }

    .auth-card { padding: 32px 24px; }

    .languages-page-hero h1 { font-size: 28px; }

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

    .languages-left { width: 48px; min-width: 48px; }
    .languages-left .languages-nav-content { display: none; }
    .languages-left .languages-nav-header h3 { display: none; }

    .chat-panel.chat-floating {
        width: 100% !important; height: 60vh !important;
        left: 0 !important; right: 0 !important; bottom: 0 !important; top: auto !important;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
}

/* ===== TRANSCRIPT TOOL BUTTONS ===== */
.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 500;
    color: var(--gray-700);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.tool-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tool-btn svg {
    flex-shrink: 0;
}

/* ===== FEATURE MODAL ===== */
.feature-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.feature-modal-content {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.feature-modal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.feature-modal-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    flex: 1;
}

.cached-badge {
    font-size: 11px;
    padding: 4px 8px;
    background: var(--success-color);
    color: white;
    border-radius: 4px;
    font-weight: 500;
}

.modal-close-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--gray-200);
    color: var(--gray-600);
    border-radius: 6px;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.modal-close-btn:hover {
    background: var(--gray-300);
    color: var(--gray-800);
}

.feature-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.feature-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.feature-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.feature-loading p {
    margin: 0;
    font-size: 16px;
    color: var(--gray-700);
    font-weight: 500;
}

.feature-loading .loading-subtitle {
    margin-top: 8px;
    font-size: 14px;
    color: var(--gray-500);
    font-weight: normal;
}

.feature-error {
    text-align: center;
    padding: 40px 20px;
    color: var(--danger-color);
}

.feature-error p {
    margin: 0 0 16px 0;
}

.no-content {
    text-align: center;
    color: var(--gray-500);
    padding: 40px 20px;
}

/* ===== FLASHCARDS ===== */
.flashcard-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.flashcard-progress {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 20px;
}

.flashcard {
    width: 100%;
    max-width: 500px;
    height: 280px;
    perspective: 1000px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

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

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.flashcard-front {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: white;
}

.flashcard-back {
    background: white;
    border: 2px solid var(--gray-200);
    color: var(--gray-800);
    transform: rotateY(180deg);
}

.flashcard-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
    margin-bottom: 12px;
}

.flashcard-text {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    text-align: center;
    line-height: 1.5;
}

.flashcard-hint {
    margin-top: 16px;
    font-size: 13px;
    color: var(--gray-400);
}

.flashcard-nav {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.flashcard-nav button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== QUIZ ===== */
.quiz-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.quiz-question {
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.quiz-question.answered-correct {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.quiz-question.answered-wrong {
    border-color: var(--danger-color);
    background: rgba(239, 68, 68, 0.05);
}

.question-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.question-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--gray-900);
    margin-bottom: 16px;
}

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

.quiz-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.quiz-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.quiz-option input {
    display: none;
}

.quiz-option input:checked + .option-letter {
    background: var(--primary-color);
    color: white;
}

.option-letter {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: 50%;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-600);
    flex-shrink: 0;
}

.option-text {
    font-size: 14px;
    color: var(--gray-700);
}

.quiz-feedback {
    margin-top: 12px;
    font-size: 14px;
    min-height: 20px;
}

.quiz-feedback.correct .feedback-correct {
    color: var(--success-color);
    font-weight: 500;
}

.quiz-feedback.wrong .feedback-wrong {
    color: var(--danger-color);
}

.feedback-warning {
    color: var(--warning-color);
}

.quiz-submit {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.quiz-score {
    font-size: 16px;
    font-weight: 600;
}

.quiz-score.good { color: var(--success-color); }
.quiz-score.okay { color: var(--warning-color); }
.quiz-score.poor { color: var(--danger-color); }

/* ===== VOCABULARY ===== */
.vocabulary-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.vocab-summary {
    font-size: 14px;
    color: var(--gray-500);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.vocab-category {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.vocab-category-title {
    margin: 0;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.vocab-list {
    display: flex;
    flex-direction: column;
}

.vocab-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-200);
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 8px;
    align-items: baseline;
}

.vocab-item:last-child {
    border-bottom: none;
}

.vocab-word {
    font-weight: 600;
    color: var(--primary-color);
}

.vocab-translation {
    color: var(--gray-700);
}

.vocab-pos {
    font-size: 11px;
    padding: 2px 6px;
    background: var(--gray-200);
    border-radius: 4px;
    color: var(--gray-600);
}

.vocab-example {
    grid-column: 1 / -1;
    font-size: 13px;
    color: var(--gray-500);
    font-style: italic;
    margin-top: 4px;
}

/* ===== STUDY GUIDE ===== */
.studyguide-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.guide-title {
    margin: 0;
    font-size: 20px;
    color: var(--gray-900);
}

.guide-section {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
}

.guide-section h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.guide-section ul,
.guide-section ol {
    margin: 0;
    padding-left: 20px;
}

.guide-section li {
    margin-bottom: 8px;
    color: var(--gray-700);
}

.grammar-item {
    padding: 12px;
    background: white;
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.grammar-item:last-child {
    margin-bottom: 0;
}

.grammar-pattern {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.grammar-explanation {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 8px;
}

.grammar-examples {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.grammar-examples .example {
    font-size: 13px;
    color: var(--primary-color);
    font-style: italic;
    padding-left: 12px;
    border-left: 2px solid var(--primary-light);
}

.phrases-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.phrase-item {
    padding: 12px;
    background: white;
    border-radius: var(--radius);
}

.phrase-foreign {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.phrase-english {
    color: var(--gray-700);
}

.phrase-usage {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 8px;
    font-style: italic;
}

.exercise-item {
    padding: 12px;
    background: white;
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.exercise-type {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.exercise-instructions {
    font-size: 14px;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.exercise-items {
    margin: 0;
    padding-left: 20px;
}

.exercise-items li {
    font-size: 14px;
    margin-bottom: 4px;
}

/* ===== SUMMARY ===== */
.summary-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.summary-title {
    margin: 0;
    font-size: 20px;
    color: var(--gray-900);
}

.summary-overview {
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-700);
    padding: 16px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.summary-section {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
}

.summary-section h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-section ul {
    margin: 0;
    padding-left: 20px;
}

.summary-section li {
    margin-bottom: 6px;
    color: var(--gray-700);
}

.vocab-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vocab-chip {
    padding: 6px 12px;
    background: white;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 500;
}

.takeaways {
    list-style: none;
    padding: 0;
}

.takeaways li {
    padding: 8px 12px;
    background: white;
    border-radius: var(--radius);
    margin-bottom: 8px;
    border-left: 3px solid var(--success-color);
}

.takeaways li:last-child {
    margin-bottom: 0;
}

/* Responsive adjustments for modal and transcript header */
@media (max-width: 768px) {
    .feature-modal {
        padding: 10px;
    }

    .feature-modal-content {
        max-height: 95vh;
    }

    .flashcard {
        height: 240px;
    }

    .flashcard-text {
        font-size: 18px;
    }

    .vocab-item {
        grid-template-columns: 1fr;
    }

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

    .transcript-tools-bar {
        width: 100%;
    }

    .transcript-tools-bar .tool-btn {
        flex: 1;
        justify-content: center;
        min-width: 0;
    }
}

/* ===== LANGUAGE REFERENCE BUTTONS ===== */
.lang-ref-btn { display: inline-flex; align-items: center; gap: 6px; }

/* ===== LANGUAGE REFERENCE CONTENT ===== */

/* Grammar Guide */
.grammar-overview { padding: 16px; background: var(--primary-light); border-radius: var(--radius-lg); margin-bottom: 16px; line-height: 1.6; color: var(--gray-700); }
.grammar-section { margin-bottom: 20px; }
.grammar-section-title { font-size: 16px; font-weight: 600; color: var(--gray-800); margin-bottom: 8px; padding-bottom: 6px; border-bottom: 2px solid var(--primary-light); }
.grammar-structure { padding: 16px; background: var(--gray-50); border-radius: var(--radius); margin-bottom: 12px; }
.grammar-pattern { font-size: 20px; font-weight: 700; color: var(--primary-color); margin-bottom: 4px; }
.grammar-explanation { color: var(--gray-600); line-height: 1.6; margin-bottom: 8px; }
.grammar-examples { list-style: none; padding: 0; }
.grammar-examples li { padding: 8px 12px; margin: 4px 0; background: white; border-left: 3px solid var(--primary-color); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.grammar-examples .original { font-weight: 600; color: var(--gray-800); }
.grammar-examples .english { font-style: italic; color: var(--gray-500); font-size: 13px; }
.grammar-topic { padding: 12px 16px; background: var(--gray-50); border-radius: var(--radius); margin-bottom: 8px; }
.grammar-topic-name { font-weight: 600; color: var(--gray-800); margin-bottom: 4px; }
.grammar-patterns-list { list-style: none; padding: 0; }
.grammar-patterns-list li { padding: 10px 12px; margin: 4px 0; background: var(--gray-50); border-radius: var(--radius-sm); }
.grammar-pattern-name { font-weight: 600; color: var(--primary-color); }
.grammar-pattern-usage { color: var(--gray-600); font-size: 13px; }
.grammar-pattern-example { font-style: italic; color: var(--gray-500); font-size: 13px; margin-top: 2px; }
.grammar-tips { list-style: none; padding: 0; }
.grammar-tips li { padding: 10px 12px; margin: 4px 0; background: #F0FDF4; border-left: 3px solid var(--success-color); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--gray-700); }

/* Alphabet & Pronunciation */
.alphabet-script-info { padding: 12px 16px; background: var(--primary-light); border-radius: var(--radius); margin-bottom: 16px; }
.alphabet-script-type { font-weight: 700; color: var(--primary-color); font-size: 14px; }
.alphabet-script-desc { color: var(--gray-600); font-size: 13px; margin-top: 4px; }
.alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}
.alphabet-item {
    padding: 10px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.15s ease;
}
.alphabet-item:hover { border-color: var(--primary-color); background: var(--primary-light); }
.alphabet-letter { font-size: 24px; font-weight: 700; color: var(--primary-color); line-height: 1.2; }
.alphabet-name { font-size: 12px; color: var(--gray-600); margin-top: 2px; }
.alphabet-pronunciation { font-size: 11px; color: var(--gray-500); font-style: italic; }
.alphabet-example { font-size: 11px; color: var(--gray-400); margin-top: 4px; }

.special-chars-section { margin-bottom: 16px; }
.special-chars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
}
.special-char-item {
    padding: 10px;
    background: #FFFBEB;
    border: 1px solid #FDE68A;
    border-radius: var(--radius);
}
.special-char-letter { font-size: 20px; font-weight: 700; color: #92400E; }
.special-char-name { font-size: 12px; color: #92400E; }
.special-char-pronunciation { font-size: 11px; color: var(--gray-500); font-style: italic; }
.special-char-usage { font-size: 11px; color: var(--gray-400); margin-top: 4px; }

.pronunciation-tips { list-style: none; padding: 0; margin-bottom: 16px; }
.pronunciation-tips li { padding: 10px 12px; margin: 4px 0; background: #F0FDF4; border-left: 3px solid var(--success-color); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--gray-700); }
.unique-sounds { list-style: none; padding: 0; }
.unique-sound-item { padding: 10px 12px; margin: 4px 0; background: var(--gray-50); border-radius: var(--radius-sm); }
.unique-sound-name { font-weight: 600; color: var(--gray-800); }
.unique-sound-tip { font-size: 13px; color: var(--gray-600); }

/* Numbers */
.numbers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}
.number-item {
    padding: 10px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.15s ease;
}
.number-item:hover { border-color: var(--primary-color); background: var(--primary-light); }
.number-digit { font-size: 20px; font-weight: 700; color: var(--primary-color); line-height: 1.2; }
.number-word { font-size: 13px; color: var(--gray-800); margin-top: 2px; font-weight: 500; }
.number-pronunciation { font-size: 11px; color: var(--gray-500); font-style: italic; }

.formation-rules { list-style: none; padding: 0; margin-bottom: 16px; }
.formation-rule { padding: 12px; margin: 6px 0; background: var(--gray-50); border-radius: var(--radius); }
.formation-rule-name { font-weight: 600; color: var(--primary-color); margin-bottom: 4px; }
.formation-rule-explanation { color: var(--gray-600); font-size: 13px; }
.formation-rule-example { font-style: italic; color: var(--gray-500); font-size: 13px; margin-top: 2px; }

.ordinals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}

.number-tips { list-style: none; padding: 0; }
.number-tips li { padding: 10px 12px; margin: 4px 0; background: #F0FDF4; border-left: 3px solid var(--success-color); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--gray-700); }

.ref-section-title { font-size: 16px; font-weight: 600; color: var(--gray-800); margin: 16px 0 8px 0; padding-bottom: 6px; border-bottom: 2px solid var(--primary-light); }

@media (max-width: 768px) {
    .languages-lesson-actions { flex-wrap: wrap; }
    .lang-ref-btn { font-size: 12px; padding: 5px 8px; }
    .alphabet-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
    .numbers-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
}