/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary-color: #8b5cf6;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;

    /* Neutral Colors */
    --white: #ffffff;
    --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;

    /* Theme Colors */
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-500);
    --border-color: var(--gray-200);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --card-padding: 2rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Light Theme Improvements */
:root {
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-tertiary: var(--gray-500);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --text-primary: #ffffff;
    --text-secondary: #e5e7eb;
    --text-tertiary: #d1d5db;
    --border-color: var(--gray-600);
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ===== LOADING SCREEN ===== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
    position: relative;
    z-index: 2;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.creator-name-animation {
    margin: 2rem 0;
    position: relative;
    animation: fadeInUp 1s ease 0.3s both;
}

.creator-name {
    font-family: 'Noto Sans Bengali', 'Kalpurush', 'SolaimanLipi', 'Nikosh', Arial, sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: #ffffff;
    text-align: center;
    margin: 0;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    background: linear-gradient(45deg, #ffffff, #60a5fa, #a78bfa, #ec4899, #f59e0b, #ffffff);
    background-size: 600% 600%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease-in-out infinite, textGlow 2s ease-in-out infinite alternate, scaleIn 1s ease 0.3s both;
    letter-spacing: 3px;
    line-height: 1.2;
    position: relative;
    transform-origin: center;
}

.name-underline {
    width: 0;
    height: 4px;
    background: linear-gradient(90deg, #60a5fa, #a78bfa, #ec4899, #f59e0b);
    margin: 1rem auto;
    border-radius: 2px;
    animation: expandLine 2s ease 1s both;
    box-shadow: 0 0 15px rgba(96, 165, 250, 0.6);
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes textGlow {
    0% {
        text-shadow: 0 0 20px rgba(255, 255, 255, 0.5),
                     0 0 40px rgba(96, 165, 250, 0.3),
                     0 0 60px rgba(167, 139, 250, 0.2);
    }
    100% {
        text-shadow: 0 0 30px rgba(255, 255, 255, 0.8),
                     0 0 60px rgba(96, 165, 250, 0.6),
                     0 0 80px rgba(167, 139, 250, 0.4),
                     0 0 100px rgba(236, 72, 153, 0.3);
    }
}

@keyframes expandLine {
    0% {
        width: 0;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        width: 250px;
        opacity: 1;
    }
}

@keyframes scaleIn {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-content h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin: 2rem 0 0.5rem;
    animation: fadeInUp 1s ease 1.5s both;
    color: rgba(255, 255, 255, 0.9);
}

.loading-content p {
    opacity: 0.7;
    font-size: 1rem;
    animation: fadeInUp 1s ease-out 1.7s both;
}

/* Loading Particles */
.loading-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.particle:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 6s;
}

.particle:nth-child(2) {
    left: 20%;
    animation-delay: 1s;
    animation-duration: 8s;
}

.particle:nth-child(3) {
    left: 30%;
    animation-delay: 2s;
    animation-duration: 7s;
}

.particle:nth-child(4) {
    left: 40%;
    animation-delay: 0.5s;
    animation-duration: 9s;
}

.particle:nth-child(5) {
    left: 60%;
    animation-delay: 1.5s;
    animation-duration: 6s;
}

.particle:nth-child(6) {
    left: 70%;
    animation-delay: 3s;
    animation-duration: 8s;
}

.particle:nth-child(7) {
    left: 80%;
    animation-delay: 2.5s;
    animation-duration: 7s;
}

.particle:nth-child(8) {
    left: 90%;
    animation-delay: 4s;
    animation-duration: 9s;
}

@keyframes float {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) scale(1);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

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

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
    height: 80px; /* Fixed height for desktop */
}

[data-theme="dark"] .header {
    background: rgba(31, 41, 55, 0.95);
    border-bottom: 1px solid var(--gray-600);
}

/* Dark theme text improvements */
[data-theme="dark"] .hero-description {
    color: #d1d5db;
}

[data-theme="dark"] .section-subtitle {
    color: #d1d5db;
}

[data-theme="dark"] .category-card p {
    color: #d1d5db;
}

[data-theme="dark"] .idiom-meaning {
    color: #f9fafb;
}

[data-theme="dark"] .idiom-example {
    color: #d1d5db;
    background: var(--gray-700);
}

[data-theme="dark"] .quiz-option p {
    color: #d1d5db;
}

[data-theme="dark"] .footer-creator p {
    color: #d1d5db;
}

[data-theme="dark"] .stat-label {
    color: #d1d5db;
}

[data-theme="dark"] .progress-info p {
    color: #d1d5db;
}

.navbar {
    padding: 1rem 0;
    height: 80px;
    display: flex;
    align-items: center;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
}

.brand-icon {
    font-size: 2rem;
    color: var(--primary-color);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.brand-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.creator-badge {
    position: absolute;
    top: 40px;
    right: -120px;
    background: linear-gradient(135deg, var(--accent-color), var(--warning-color));
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    animation: slideInRight 1s ease-out 1s both;
    box-shadow: var(--shadow-md);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sample-data-btn {
    background: linear-gradient(135deg, #10b981, #059669);
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.sample-data-btn:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.sample-data-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.sample-data-btn i {
    font-size: 0.875rem;
}

.reset-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.reset-btn:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.reset-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.reset-btn i {
    font-size: 0.875rem;
}

.notification-bell {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    margin-right: 0.5rem;
}

.notification-bell:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.05);
}

.notification-bell.has-notifications {
    animation: bellShake 2s ease-in-out infinite;
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.375rem;
    border-radius: 10px;
    min-width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.notification-badge.show {
    transform: scale(1);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes bellShake {
    0%, 50%, 100% { transform: rotate(0deg) scale(1.05); }
    10%, 30% { transform: rotate(-10deg) scale(1.05); }
    20%, 40% { transform: rotate(10deg) scale(1.05); }
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ===== NOTIFICATION PANEL ===== */
.notification-panel {
    position: absolute;
    top: 100%;
    right: 2rem;
    width: 350px;
    max-height: 400px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.notification-panel.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.notification-header h3 {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.clear-notifications {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-notifications:hover {
    background: var(--bg-primary);
    color: var(--danger-color);
    transform: scale(1.1);
}

.notification-list {
    max-height: 300px;
    overflow-y: auto;
    padding: 0.5rem 0;
}

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.notification-item:hover {
    background: var(--bg-secondary);
}

.notification-item.unread {
    background: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--primary-color);
}

.notification-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.notification-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.notification-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.notification-icon.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
}

.notification-message {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.4;
    margin-bottom: 0.25rem;
}

.notification-time {
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

.no-notifications {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
    color: var(--text-secondary);
    text-align: center;
}

.no-notifications i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-notifications p {
    margin: 0;
    font-size: 0.875rem;
}

.sound-toggle,
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: 0.5rem;
}

.sound-toggle:hover,
.theme-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.05);
}

.sound-toggle.disabled {
    color: var(--text-tertiary);
    opacity: 0.5;
    border-color: var(--border-color);
}

.sound-toggle.disabled:hover {
    color: var(--text-tertiary);
    border-color: var(--border-color);
    transform: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: 80px;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== HERO SECTION ===== */
.hero-section {
    padding: 20px 50px;
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.05) 0%,
        rgba(139, 92, 246, 0.05) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 2rem;
    animation: slideInDown 1s ease-out 0.3s both;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out 0.5s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    animation: fadeInUp 1s ease-out 0.7s both;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 1s ease-out 0.9s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease-out 1.1s both;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ===== HERO VISUAL ===== */
.hero-visual {
    position: relative;
    animation: fadeInRight 1s ease-out 0.8s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.floating-cards {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 200px;
    animation: floatCard 3s ease-in-out infinite;
}

[data-theme="dark"] .floating-card {
    background: var(--gray-800);
    border: 1px solid var(--gray-600);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .floating-card span {
    color: #f9fafb;
}

/* Dark theme input and form improvements */
[data-theme="dark"] #search-input {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] #search-input::placeholder {
    color: #9ca3af;
}

[data-theme="dark"] .filter-select {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .filter-toggle {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

/* Dark theme card improvements */
[data-theme="dark"] .category-card {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

[data-theme="dark"] .category-card h3 {
    color: #f9fafb;
}

[data-theme="dark"] .idiom-card {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

[data-theme="dark"] .quiz-option {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .progress-card {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

[data-theme="dark"] .chart-container {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

[data-theme="dark"] .chart-container h3 {
    color: #f9fafb;
}

/* Dark theme button improvements */
[data-theme="dark"] .btn-outline {
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .btn-outline:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

[data-theme="dark"] .action-btn {
    background: var(--gray-700);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .action-btn:hover {
    background: var(--gray-600);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

[data-theme="dark"] .sample-data-btn {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .sample-data-btn:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .reset-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .reset-btn:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .notification-bell {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .notification-bell:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

[data-theme="dark"] .notification-bell.has-notifications {
    border-color: var(--warning-color);
    color: var(--warning-color);
}

[data-theme="dark"] .notification-panel {
    background: var(--gray-800);
    border-color: var(--gray-600);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .notification-header {
    background: var(--gray-700);
    border-bottom-color: var(--gray-600);
}

[data-theme="dark"] .notification-header h3 {
    color: #f9fafb;
}

[data-theme="dark"] .notification-item {
    border-bottom-color: var(--gray-700);
}

[data-theme="dark"] .notification-item:hover {
    background: var(--gray-700);
}

[data-theme="dark"] .notification-item.unread {
    background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .clear-notifications:hover {
    background: var(--gray-600);
}

[data-theme="dark"] .sound-toggle,
[data-theme="dark"] .theme-toggle {
    background: var(--gray-800);
    color: #f9fafb;
    border-color: var(--gray-600);
}

[data-theme="dark"] .sound-toggle.disabled {
    color: var(--gray-500);
    opacity: 0.5;
    border-color: var(--gray-700);
}

[data-theme="dark"] .voice-search {
    background: var(--primary-color);
}

/* Dark theme navigation improvements */
[data-theme="dark"] .nav-link {
    color: #d1d5db;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.15);
}

/* Dark theme hero section improvements */
[data-theme="dark"] .hero-section {
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.08) 0%,
        rgba(139, 92, 246, 0.08) 100%);
}

/* Dark theme search section improvements */
[data-theme="dark"] .search-section {
    background: var(--gray-800);
    border-color: var(--gray-600);
}

/* Dark theme featured section improvements */
[data-theme="dark"] .featured-section {
    background: var(--gray-800);
}

/* Dark theme notification improvements */
[data-theme="dark"] .notification {
    background: var(--gray-700);
    color: #f9fafb;
    border-left-color: var(--primary-color);
}

/* Dark theme difficulty badges */
[data-theme="dark"] .difficulty-beginner {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

[data-theme="dark"] .difficulty-intermediate {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

[data-theme="dark"] .difficulty-advanced {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* Dark theme category count badges */
[data-theme="dark"] .category-count {
    background: rgba(59, 130, 246, 0.2);
    color: #60a5fa;
}

/* Dark theme quiz improvements */
[data-theme="dark"] .quiz-container {
    color: #f9fafb;
}

[data-theme="dark"] .quiz-header h2 {
    color: #f9fafb;
}

[data-theme="dark"] .quiz-header p {
    color: #d1d5db;
}

[data-theme="dark"] .quiz-option h3 {
    color: #f9fafb;
}

[data-theme="dark"] .quiz-question h3 {
    color: #f9fafb;
}

[data-theme="dark"] .progress-text {
    color: #d1d5db;
}

[data-theme="dark"] .explanation-content {
    color: #f9fafb;
}

[data-theme="dark"] .explanation-content h4 {
    color: #f9fafb;
}

[data-theme="dark"] .explanation-content p {
    color: #d1d5db;
}

[data-theme="dark"] .quiz-results {
    color: #f9fafb;
}

[data-theme="dark"] .quiz-results h3 {
    color: #f9fafb;
}

[data-theme="dark"] .result-message {
    color: #d1d5db;
}

/* Dark theme progress section improvements */
[data-theme="dark"] .progress-header h2 {
    color: #f9fafb;
}

[data-theme="dark"] .progress-header p {
    color: #d1d5db;
}

[data-theme="dark"] .progress-info h3 {
    color: var(--primary-color);
}

/* Dark theme loading screen text */
[data-theme="dark"] .loading-content h2 {
    color: white;
}

[data-theme="dark"] .loading-content p {
    color: rgba(255, 255, 255, 0.8);
}

/* Dark theme brand text improvements */
[data-theme="dark"] .brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Dark theme creator badge improvements */
[data-theme="dark"] .creator-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--warning-color));
    color: white;
}

/* Dark theme footer improvements */
[data-theme="dark"] .footer-brand {
    color: white;
}

[data-theme="dark"] .footer-links a {
    color: #9ca3af;
}

[data-theme="dark"] .footer-links a:hover {
    color: var(--primary-color);
}

[data-theme="dark"] .footer-actions {
    border-top-color: var(--gray-600);
    border-bottom-color: var(--gray-600);
}

[data-theme="dark"] .footer-actions .sample-data-btn {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .footer-actions .sample-data-btn:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .footer-actions .reset-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .footer-actions .reset-btn:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .footer-bottom {
    color: #6b7280;
}

/* Dark theme section title improvements */
[data-theme="dark"] .section-title {
    color: #f9fafb;
}

/* Dark theme hero badge improvements */
[data-theme="dark"] .hero-badge {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

/* Dark theme hero title improvements */
[data-theme="dark"] .hero-title {
    color: #f9fafb;
}

/* Dark theme gradient text improvements */
[data-theme="dark"] .gradient-text {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Dark theme search icon improvements */
[data-theme="dark"] .search-icon {
    color: #9ca3af;
}

/* Dark theme quiz correct/incorrect styles */
[data-theme="dark"] .quiz-option.correct {
    background: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
    color: #34d399;
}

[data-theme="dark"] .quiz-option.incorrect {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #f87171;
}

/* Dark theme progress bar improvements */
[data-theme="dark"] .progress-bar {
    background: var(--gray-700);
}

[data-theme="dark"] .progress-fill {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

/* Dark theme result score improvements */
[data-theme="dark"] .result-score {
    color: #f9fafb;
}

[data-theme="dark"] .result-percentage {
    color: var(--primary-color);
}

/* Dark theme learned and favorite button states */
[data-theme="dark"] .action-btn.learned {
    background: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
    color: #34d399;
}

[data-theme="dark"] .action-btn.favorite {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #f87171;
}

/* Dark theme scrollbar improvements */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--gray-800);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-600);
    border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Dark theme text selection */
[data-theme="dark"] ::selection {
    background: rgba(59, 130, 246, 0.3);
    color: #f9fafb;
}

[data-theme="dark"] ::-moz-selection {
    background: rgba(59, 130, 246, 0.3);
    color: #f9fafb;
}

/* Dark theme focus states */
[data-theme="dark"] *:focus {
    outline-color: var(--primary-color);
}

/* Dark theme placeholder text */
[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder {
    color: #9ca3af;
    opacity: 1;
}

/* Dark theme disabled states */
[data-theme="dark"] button:disabled,
[data-theme="dark"] input:disabled {
    background: var(--gray-700);
    color: #6b7280;
    border-color: var(--gray-600);
    cursor: not-allowed;
}

/* Dark theme hover states for cards */
[data-theme="dark"] .category-card:hover {
    background: var(--gray-700);
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .idiom-card:hover {
    background: var(--gray-700);
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

.floating-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.floating-card span {
    font-weight: 600;
    color: var(--text-primary);
}

.card-1 {
    top: 20px;
    left: 20px;
    animation-delay: 0s;
}

.card-2 {
    top: 120px;
    right: 40px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 60px;
    left: 60px;
    animation-delay: 2s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(2deg); }
}

/* ===== SEARCH SECTION ===== */
.search-section {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
}

.search-box {
    position: relative;
    margin-bottom: 2rem;
    z-index: 100;
}

.search-icon {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.25rem;
}

#search-input {
    width: 100%;
    padding: 1.25rem 1.5rem 1.25rem 4rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1.125rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.clear-search {
    position: absolute;
    right: 4rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gray-400);
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0;
    visibility: hidden;
}

.clear-search.show {
    opacity: 1;
    visibility: visible;
}

.clear-search:hover {
    background: var(--error-color);
    transform: translateY(-50%) scale(1.05);
}

.voice-search {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.voice-search:hover {
    background: var(--primary-dark);
    transform: translateY(-50%) scale(1.05);
}

.search-filters {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.filter-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.filter-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.clear-filters {
    background: linear-gradient(135deg, var(--error-color), #dc2626);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.clear-filters:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.clear-filters:active {
    transform: translateY(0);
}

/* ===== SEARCH HIGHLIGHTING ===== */
mark {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-weight: 600;
    animation: highlight 0.5s ease;
}

@keyframes highlight {
    0% {
        background: var(--warning-color);
        transform: scale(1.1);
    }
    100% {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        transform: scale(1);
    }
}

[data-theme="dark"] mark {
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    color: var(--gray-900);
}

/* ===== ENHANCED SEARCH SUGGESTIONS ===== */
.search-suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: 350px;
    overflow: hidden;
    display: none;
    animation: slideDown 0.2s ease-out;
    backdrop-filter: blur(10px);
}

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

.suggestion-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

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

.suggestion-item:hover,
.suggestion-item.selected {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.suggestion-item.selected {
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--primary-color);
}

.suggestion-item i {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.suggestion-item:hover i,
.suggestion-item.selected i {
    color: var(--primary-color);
}

.suggestion-item span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Dark theme suggestions */
[data-theme="dark"] .search-suggestions {
    background: var(--gray-800);
    border-color: var(--gray-600);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .suggestion-item {
    border-bottom-color: var(--gray-700);
}

/* ===== ENHANCED SEARCH FEATURES ===== */
.suggestions-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.suggestions-header span {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.clear-history {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-history:hover {
    background: var(--bg-tertiary);
    color: var(--danger);
    transform: scale(1.05);
}

.suggestions-list {
    padding: 0.5rem 0;
    max-height: 250px;
    overflow-y: auto;
}

.suggestion-item.highlighted {
    background: var(--bg-secondary);
    border-left: 3px solid var(--primary-color);
    transform: translateX(2px);
}

.suggestion-item.highlighted::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 0 2px 2px 0;
}

/* Search highlight styling */
.search-highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--gray-900);
    padding: 0.125rem 0.25rem;
    border-radius: 4px;
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Voice search listening state */
.voice-search.listening {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translateY(-50%) scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    50% {
        transform: translateY(-50%) scale(1.05);
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
}

/* Loading state for search */
.search-icon.fa-spin {
    color: var(--primary-color);
}

/* Dark theme enhancements */
[data-theme="dark"] .search-suggestions-dropdown {
    background: var(--gray-800);
    border-color: var(--gray-600);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .search-highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--gray-900);
}

/* ===== SEARCH STATS ===== */
.search-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.stats-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.stats-value {
    color: var(--primary-color);
    font-weight: 600;
    font-family: 'Inter', monospace;
}

/* ===== MOBILE RESPONSIVE STYLES ===== */
@media (max-width: 768px) {
    /* Header Mobile Optimization */
    .header {
        height: 60px; /* Reduced height for mobile */
    }

    .navbar {
        padding: 0.5rem 0; /* Reduced padding */
        height: 60px;
    }

    .nav-container {
        padding: 0 1rem; /* Reduced side padding */
    }

    .brand {
        font-size: 1.25rem; /* Smaller brand text */
    }

    .nav-controls {
        gap: 0.5rem; /* Reduced gap between controls */
    }

    .sound-toggle,
    .theme-toggle,
    .notification-bell {
        width: 36px; /* Smaller buttons */
        height: 36px;
        font-size: 1rem; /* Smaller icons */
    }

    .nav-toggle {
        width: 36px;
        height: 36px;
    }

    .nav-toggle span {
        height: 2px; /* Thinner hamburger lines */
    }

    /* Adjust main content top margin */
    .main-content {
        margin-top: 60px; /* Match mobile header height */
    }

    .hero-section {
        padding: 1.5rem 0; /* Reduced padding for mobile */
        min-height: auto; /* Remove fixed height */
    }

    .hero-content {
        padding: 1rem; /* Reduced content padding */
    }

    /* Search stats responsive */
    .search-stats {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .stats-item {
        justify-content: center;
    }
}

/* ===== ENHANCED QUIZ STYLING ===== */
.quiz-header-active {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    color: white;
}

.quiz-info h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.quiz-type-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.quiz-timer.timer-warning {
    background: rgba(255, 193, 7, 0.9);
    animation: pulse-warning 1s infinite;
}

.quiz-timer.timer-critical {
    background: rgba(220, 53, 69, 0.9);
    animation: pulse-critical 0.5s infinite;
}

@keyframes pulse-warning {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes pulse-critical {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
}

.score-display {
    font-weight: 600;
    color: var(--primary-color);
}

.quiz-question .question-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.category-badge, .difficulty-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.category-badge {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.difficulty-beginner {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.difficulty-intermediate {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.difficulty-advanced {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.question-text {
    font-size: 1.5rem;
    margin: 1rem 0;
    line-height: 1.4;
}

.idiom-highlight {
    color: var(--primary-color);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.question-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    margin: 0.75rem 0;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.quiz-option:hover:not(:disabled) {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.quiz-option.correct {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border-color: #28a745;
    color: #155724;
}

.quiz-option.incorrect {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    border-color: #dc3545;
    color: #721c24;
}

.quiz-option.disabled {
    opacity: 0.6;
    background: var(--bg-secondary);
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.quiz-option.correct .option-letter {
    background: #28a745;
}

.quiz-option.incorrect .option-letter {
    background: #dc3545;
}

.option-text {
    flex: 1;
    font-size: 1.2rem;
    line-height: 1.4;
}

.option-icon {
    font-size: 1.25rem;
    margin-left: auto;
}

.quiz-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    gap: 1rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

.explanation-content {
    margin-top: 2rem;
    padding: 2rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.explanation-content.correct {
    background: linear-gradient(135deg, #038b23, #001577);
    border-left-color: #28a745;
}

.explanation-content.incorrect {
    background: linear-gradient(135deg, #490007, #f5c6cb);
    border-left-color: #dc3545;
}

.explanation-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.result-icon {
    font-size: 2rem;
}

.explanation-header h4 {
    margin: 0;
    font-size: 1.25rem;
}

.idiom-details {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Quiz Results Styling */
.quiz-results {
    text-align: center;
    padding: 2rem;
}

.quiz-results.time-up {
    border: 2px solid #ffc107;
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
}

.result-header {
    margin-bottom: 2rem;
}

.result-header .result-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-item {
    background: var(--bg-secondary);
    padding: 1.5rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-performance {
    margin: 2rem 0;
}

.performance-bar {
    width: 100%;
    height: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    overflow: hidden;
    margin: 1rem 0;
}

.performance-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 0.5rem;
    transition: width 2s ease-in-out;
}

.result-breakdown {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin: 2rem 0;
    text-align: left;
}

.breakdown-stats {
    display: grid;
    gap: 1rem;
}

.breakdown-section h5 {
    margin: 1rem 0 0.5rem 0;
    color: var(--primary-color);
    font-weight: 600;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.breakdown-label {
    font-weight: 500;
    text-transform: capitalize;
}

.breakdown-score {
    font-weight: 600;
    color: var(--primary-color);
}

/* Quiz Review Styling */
.quiz-review {
    max-width: 800px;
    margin: 0 auto;
}

.review-header {
    text-align: center;
    margin-bottom: 2rem;
}

.review-summary {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.summary-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.summary-value {
    font-weight: 600;
    color: var(--primary-color);
}

.review-question {
    margin: 1.5rem 0;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--border-color);
}

.review-question.correct {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border-left-color: #28a745;
}

.review-question.incorrect {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    border-left-color: #dc3545;
}

.review-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.question-number {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    position: static;
}

.question-result {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.review-question-content h4 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
}

.question-meta {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.review-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive Quiz Styling */
@media (max-width: 768px) {
    .quiz-header-active {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .quiz-timer {
        font-size: 1rem;
    }

    .progress-info {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .quiz-option {
        padding: 1rem;
    }

    .option-letter {
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
    }

    .quiz-actions {
        flex-direction: column;
    }

    .action-buttons {
        width: 100%;
        justify-content: center;
    }

    .result-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .idiom-details {
        flex-direction: column;
        gap: 1rem;
    }

    .review-summary {
        flex-direction: column;
        gap: 1rem;
    }

    .review-actions {
        flex-direction: column;
    }
}

/* ===== DYNAMIC CONTENT STYLING ===== */
.daily-challenge, .personalized-section {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.challenge-header, .personalized-header {
    text-align: center;
    margin-bottom: 2rem;
}

.challenge-header h3, .personalized-header h3 {
    margin: 0 0 0.5rem 0;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.challenge-header p, .personalized-header p {
    margin: 0;
    color: var(--text-secondary);
}

/* Daily Challenge Styling */
.challenge-completed {
    text-align: center;
    padding: 2rem;
}

.completion-icon {
    font-size: 3rem;
    color: #28a745;
    margin-bottom: 1rem;
}

.challenge-active .challenge-progress {
    margin-bottom: 2rem;
    text-align: center;
}

.challenge-progress span {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.challenge-idioms {
    display: grid;
    gap: 1rem;
}

.challenge-idiom {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.challenge-idiom.attempted {
    background: linear-gradient(135deg, #002008, #c3e6cb);
    border-color: #28a745;
}

.idiom-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.challenge-idiom.attempted .idiom-number {
    background: #28a745;
}

.idiom-content {
    flex: 1;
}

.idiom-content h5 {
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.idiom-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.challenge-btn {
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.challenge-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.challenge-btn:disabled {
    background: #28a745;
    cursor: not-allowed;
}

/* Personalized Content Styling */
.personalized-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.stats-card, .recommendations-card, .achievements-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.stats-card h4, .recommendations-card h4, .achievements-card h4 {
    margin: 0 0 1.5rem 0;
    color: var(--primary-color);
    font-size: 1.25rem;
    text-align: center;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.recommendation-items {
    margin-bottom: 1.5rem;
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.rec-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    flex-shrink: 0;
}

.rec-content h6 {
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.rec-content p {
    margin: 0 0 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.rec-meta {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.achievement-list {
    display: grid;
    gap: 1rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid #ffc107;
}

.achievement-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: #fff3cd;
    color: #856404;
    border-radius: 50%;
    flex-shrink: 0;
}

.achievement-content h6 {
    margin: 0 0 0.25rem 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.achievement-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Challenge Modal Styling */
.challenge-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h4 {
    margin: 0;
    color: var(--primary-color);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

.modal-body {
    padding: 2rem;
}

.modal-body h3 {
    margin: 0 0 2rem 0;
    text-align: center;
    color: var(--text-primary);
}

.challenge-options {
    display: grid;
    gap: 1rem;
}

.challenge-option {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-size: 1rem;
}

.challenge-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.challenge-result {
    text-align: center;
    padding: 2rem;
}

.challenge-result.correct {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border-radius: 8px;
}

.challenge-result.incorrect {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    border-radius: 8px;
}

.challenge-result .result-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.challenge-result.correct .result-icon {
    color: #28a745;
}

.challenge-result.incorrect .result-icon {
    color: #dc3545;
}

/* Responsive Dynamic Content */
@media (max-width: 768px) {
    .daily-challenge, .personalized-section {
        margin: 1rem 0;
        padding: 1.5rem;
    }

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

    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .challenge-idiom {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .modal-content {
        width: 95%;
        margin: 1rem;
    }

    .modal-header, .modal-body {
        padding: 1.5rem;
    }

    .recommendation-item, .achievement-item {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== REAL-TIME REFRESH SYSTEM STYLING ===== */
.refresh-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    display: none;
    align-items: center;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.refresh-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.refresh-content i {
    font-size: 1rem;
}

.refresh-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.refresh-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.refresh-btn i {
    transition: transform 0.3s ease;
}

.refresh-btn:hover i {
    transform: rotate(180deg);
}

/* Auto-refresh notification */
.auto-refresh-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--success);
    color: white;
    padding: 1rem 2rem;
    border-radius: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    animation: slideUpFade 3s ease forwards;
}

@keyframes slideUpFade {
    0% {
        transform: translateX(-50%) translateY(100%);
        opacity: 0;
    }
    20%, 80% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) translateY(-100%);
        opacity: 0;
    }
}

/* Data freshness indicator */
.data-freshness {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 1rem;
}

.freshness-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse-dot 2s infinite;
}

.freshness-dot.stale {
    background: var(--warning);
}

.freshness-dot.error {
    background: var(--danger);
}

@keyframes pulse-dot {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* Loading states for dynamic content */
.content-loading {
    position: relative;
    overflow: hidden;
}

.content-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Enhanced notification for new content */
.new-content-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Responsive refresh system */
@media (max-width: 768px) {
    .refresh-indicator {
        top: 10px;
        right: 10px;
        padding: 0.75rem 1rem;
        font-size: 0.8rem;
    }

    .refresh-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
        margin: 0.25rem;
    }

    .auto-refresh-notification {
        bottom: 10px;
        left: 10px;
        right: 10px;
        transform: none;
        text-align: center;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .data-freshness {
        font-size: 0.7rem;
        margin-left: 0.5rem;
    }
}

/* ===== CELEBRATION & PARTY ANIMATIONS ===== */
@keyframes confetti-fall {
    0% {
        transform: translateY(-10px) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

@keyframes flash-effect {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

@keyframes celebration-bounce {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1;
    }
    70% {
        transform: translate(-50%, -50%) scale(0.9);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0;
    }
}

@keyframes firework-particle {
    0% {
        transform: translate(0, 0);
        opacity: 1;
    }
    100% {
        transform: translate(var(--dx), var(--dy));
        opacity: 0;
    }
}

.confetti-piece {
    animation: confetti-fall linear forwards;
}

.screen-flash {
    animation: flash-effect 0.5s ease-out forwards;
}

.celebration-text {
    animation: celebration-bounce 1.5s ease-out forwards;
    font-family: 'Inter', sans-serif;
    user-select: none;
}

.firework {
    animation: firework-explosion 2s ease-out forwards;
}

@keyframes firework-explosion {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    10% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(3);
        opacity: 0;
    }
}

/* Enhanced Quiz Success Animations */
.quiz-option.correct {
    animation: correct-answer-celebration 0.8s ease-out forwards;
}

@keyframes correct-answer-celebration {
    0% {
        transform: scale(1);
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    25% {
        transform: scale(1.05);
        box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 12px 35px rgba(40, 167, 69, 0.6);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
    }
}

/* Party Mode for Entire Website */
.party-mode {
    animation: party-background 2s ease-in-out;
}

@keyframes party-background {
    0%, 100% {
        filter: hue-rotate(0deg) brightness(1);
    }
    25% {
        filter: hue-rotate(90deg) brightness(1.1);
    }
    50% {
        filter: hue-rotate(180deg) brightness(1.2);
    }
    75% {
        filter: hue-rotate(270deg) brightness(1.1);
    }
}

/* Success Ripple Effect */
.success-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(40, 167, 69, 0.3);
    transform: scale(0);
    animation: ripple-effect 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-effect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Timer Warning Animations */
.timer-warning {
    animation: timer-warning-pulse 1s infinite;
}

.timer-critical {
    animation: timer-critical-shake 0.5s infinite;
}

@keyframes timer-warning-pulse {
    0%, 100% {
        background: rgba(255, 193, 7, 0.9);
        transform: scale(1);
    }
    50% {
        background: rgba(255, 193, 7, 1);
        transform: scale(1.05);
    }
}

@keyframes timer-critical-shake {
    0%, 100% {
        transform: translateX(0);
        background: rgba(220, 53, 69, 0.9);
    }
    25% {
        transform: translateX(-5px);
        background: rgba(220, 53, 69, 1);
    }
    75% {
        transform: translateX(5px);
        background: rgba(220, 53, 69, 1);
    }
}

/* Floating Hearts Animation for Correct Answers */
.floating-hearts {
    position: fixed;
    pointer-events: none;
    z-index: 10000;
}

.heart {
    position: absolute;
    color: #ff6b6b;
    font-size: 2rem;
    animation: float-up 2s ease-out forwards;
}

@keyframes float-up {
    0% {
        transform: translateY(0) scale(0);
        opacity: 1;
    }
    50% {
        transform: translateY(-50px) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) scale(0);
        opacity: 0;
    }
}

/* Quiz Complete Celebration */
.quiz-complete-celebration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 10000;
    background: radial-gradient(circle, rgba(255,215,0,0.1) 0%, transparent 70%);
    animation: quiz-complete-glow 3s ease-out forwards;
}

@keyframes quiz-complete-glow {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
    100% {
        opacity: 0;
        transform: scale(1);
    }
}

/* Sound Control Button */
.sound-control {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 1000;
}

.sound-control:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.sound-control.disabled {
    background: var(--text-secondary);
    opacity: 0.6;
}

/* Volume Slider */
.volume-control {
    position: fixed;
    bottom: 90px;
    right: 20px;
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: none;
    z-index: 1001;
}

.volume-control.show {
    display: block;
    animation: slideUp 0.3s ease;
}

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

.volume-slider {
    width: 100px;
    height: 5px;
    border-radius: 5px;
    background: var(--bg-secondary);
    outline: none;
    -webkit-appearance: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.volume-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

/* Responsive Celebration Animations */
@media (max-width: 768px) {
    .celebration-text {
        font-size: 2.5rem;
    }

    .confetti-piece {
        width: 6px !important;
        height: 6px !important;
    }

    .sound-control {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
        bottom: 15px;
        right: 15px;
    }

    .volume-control {
        bottom: 75px;
        right: 15px;
        padding: 0.75rem;
    }

    .volume-slider {
        width: 80px;
    }
}

/* Accessibility for animations */
@media (prefers-reduced-motion: reduce) {
    .confetti-piece,
    .screen-flash,
    .celebration-text,
    .firework,
    .quiz-option.correct,
    .party-mode,
    .success-ripple,
    .floating-hearts .heart,
    .quiz-complete-celebration {
        animation: none !important;
    }

    .timer-warning,
    .timer-critical {
        animation: none !important;
    }
}

/* ===== NO RESULTS STYLING ===== */
.no-results {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.no-results i {
    font-size: 4rem;
    color: var(--text-tertiary);
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-results h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.no-results p {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 400px;
    margin: 0 auto;
    line-height: 1.6;
}

[data-theme="dark"] .suggestion-item:hover,
[data-theme="dark"] .suggestion-item.selected {
    background: var(--gray-700);
}

[data-theme="dark"] .suggestion-item.selected {
    background: rgba(96, 165, 250, 0.2);
    border-left-color: var(--primary-color);
}

/* ===== SECTIONS ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== CATEGORIES SECTION ===== */
.categories-section {
    padding: var(--section-padding);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
    transition: left 0.5s;
}

.category-card:hover::before {
    left: 100%;
}

.category-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all var(--transition-normal);
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-icon i {
    font-size: 2rem;
    color: white;
}

.category-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.category-count {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* ===== FEATURED SECTION ===== */
.featured-section {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.idioms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.idiom-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.idiom-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.idiom-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.idiom-phrase {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.difficulty-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.difficulty-beginner {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.difficulty-intermediate {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.difficulty-advanced {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

.idiom-meaning {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.idiom-example {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.idiom-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.05);
}

.load-more-container {
    text-align: center;
}

/* ===== QUIZ SECTION ===== */
.quiz-section {
    padding: var(--section-padding);
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

.quiz-header {
    text-align: center;
    margin-bottom: 3rem;
}

.quiz-header h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.quiz-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.quiz-option {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.quiz-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.quiz-option i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.quiz-option h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.quiz-option p {
    color: var(--text-secondary);
}

/* ===== PROGRESS SECTION ===== */
.progress-section {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.progress-header {
    text-align: center;
    margin-bottom: 3rem;
}

.progress-header h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.progress-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.progress-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-icon i {
    font-size: 1.5rem;
    color: white;
}

.progress-info h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.progress-info p {
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.chart-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.chart-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.chart-container h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.chart-wrapper {
    position: relative;
    height: 300px;
    width: 100%;
}

.chart-wrapper canvas {
    max-width: 100%;
    height: auto;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 3rem 0 1rem;
}

[data-theme="dark"] .footer {
    background: var(--gray-800);
    border-top: 1px solid var(--gray-700);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-brand i {
    font-size: 2rem;
    color: var(--primary-color);
}

.footer-creator {
    text-align: center;
    width: 370px;
}

.footer-creator p {
    margin-bottom: 0.5rem;
}

.footer-creator strong {
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: brightness(1); }
    to { filter: brightness(1.2); }
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 2rem 0;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.footer-actions .sample-data-btn,
.footer-actions .reset-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    min-width: 180px;
    justify-content: center;
}

.footer-actions .sample-data-btn:hover,
.footer-actions .reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.footer-actions .sample-data-btn {
    background: linear-gradient(135deg, #10b981, #059669);
}

.footer-actions .sample-data-btn:hover {
    background: linear-gradient(135deg, #059669, #047857);
}

.footer-actions .reset-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.footer-actions .reset-btn:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .hero-title {
        font-size: 3rem;
    }

    .creator-badge {
        position: static;
        margin-top: 0.5rem;
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .creator-name {
        font-size: 3rem;
        letter-spacing: 2px;
    }

    .name-underline {
        width: 200px;
    }

    .nav-menu {
        position: fixed;
        top: 60px; /* Match mobile header height */
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px); /* Adjust for mobile header */
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 2rem 0;
        transition: left 0.3s ease;
        border-top: 1px solid var(--border-color);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }



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

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .search-filters {
        flex-direction: column;
        align-items: stretch;
    }

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

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

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

    .progress-stats {
        grid-template-columns: 1fr;
    }

    .progress-charts {
        grid-template-columns: 1fr;
    }

    .chart-container {
        padding: 1.5rem;
    }

    .chart-wrapper {
        height: 250px;
    }

    .footer-actions {
        gap: 1.5rem;
        padding: 1.5rem 0;
    }

    .footer-actions .sample-data-btn,
    .footer-actions .reset-btn {
        min-width: 160px;
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

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

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

    .floating-cards {
        height: 300px;
    }

    .floating-card {
        min-width: 150px;
        padding: 1rem;
    }

    .creator-name {
        font-size: 2.5rem;
        letter-spacing: 2px;
    }

    .name-underline {
        width: 180px;
    }

    .footer-actions {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem 0;
    }

    .footer-actions .sample-data-btn,
    .footer-actions .reset-btn {
        width: 100%;
        max-width: 280px;
        padding: 1rem 1.5rem;
    }

    .notification-panel {
        right: 1rem;
        width: calc(100vw - 2rem);
        max-width: 320px;
        top: calc(100% + 0.5rem); /* Adjust for mobile header */
    }

    .notification-header {
        padding: 0.75rem 1rem;
    }

    .notification-item {
        padding: 0.75rem 1rem;
    }

    .notification-icon {
        width: 35px;
        height: 35px;
        font-size: 0.875rem;
    }

    .reset-modal-content {
        width: 95%;
        margin: 1rem;
    }

    .reset-modal-header,
    .reset-modal-body {
        padding: 1.5rem;
    }

    .reset-modal-actions {
        padding: 1rem 1.5rem 1.5rem;
        flex-direction: column;
    }

    .reset-modal-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .search-suggestions {
        max-height: 200px;
    }

    .suggestion-item {
        padding: 1rem;
        font-size: 0.875rem;
    }
}

/* ===== RESET MODAL ===== */
.reset-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.reset-modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
    margin: 20px auto;
}

.reset-modal-header {
    padding: 2rem 2rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.reset-modal-header i {
    font-size: 3rem;
    color: #ef4444;
    margin-bottom: 1rem;
}

.reset-modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.reset-modal-body {
    padding: 2rem;
}

.reset-modal-body > p {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.reset-items {
    margin-bottom: 1.5rem;
}

.reset-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
}

.reset-item i {
    color: var(--primary-color);
    width: 20px;
}

.reset-item span {
    color: var(--text-primary);
    font-weight: 500;
}

.reset-warning {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 1rem;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    margin: 0;
}

.reset-modal-actions {
    padding: 1rem 2rem 2rem;
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.reset-confirm {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
}

.reset-confirm:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c) !important;
}

/* Dark theme modal */
[data-theme="dark"] .reset-modal-content {
    background: var(--gray-800);
    border: 1px solid var(--gray-600);
}

[data-theme="dark"] .reset-modal-header {
    border-bottom-color: var(--gray-600);
}

[data-theme="dark"] .reset-item {
    background: var(--gray-700);
}

[data-theme="dark"] .reset-warning {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

/* ===== SCROLL NAVIGATION ===== */
.scroll-navigation {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 1000;
}

.scroll-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
}

.scroll-btn.show {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.scroll-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.scroll-btn:active {
    transform: scale(0.95);
}

.scroll-to-top {
    animation-delay: 0.1s;
}

.scroll-to-bottom {
    animation-delay: 0.2s;
}

/* Scroll button animations */
@keyframes scrollBtnFadeIn {
    from {
        opacity: 0;
        transform: scale(0.5) translateX(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateX(0);
    }
}

.scroll-btn.show {
    animation: scrollBtnFadeIn 0.3s ease forwards;
}

/* Dark theme scroll buttons */
[data-theme="dark"] .scroll-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .scroll-btn:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* Mobile responsive scroll buttons */
@media (max-width: 768px) {
    .scroll-navigation {
        right: 1rem;
        gap: 0.25rem;
    }

    .scroll-btn {
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .scroll-navigation {
        right: 0.75rem;
        bottom: 2rem;
        top: auto;
        transform: none;
        flex-direction: row;
        justify-content: center;
    }

    .scroll-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* ===== SCROLL PROGRESS INDICATOR ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 10000;
    transition: opacity var(--transition-fast);
}

.scroll-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.1s ease;
    position: relative;
}

.scroll-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-20px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateX(20px); opacity: 0; }
}

/* Dark theme scroll progress */
[data-theme="dark"] .scroll-progress {
    background: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .scroll-progress-fill {
    background: linear-gradient(90deg, #60a5fa, #a78bfa);
}

/* Hide progress bar when at top */
.scroll-progress.hidden {
    opacity: 0;
}

/* ===== SECTION INDICATOR ===== */
.section-indicator {
    position: fixed;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.section-indicator.show {
    opacity: 1;
    visibility: visible;
}

.section-dots {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.section-dot {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    backdrop-filter: blur(10px);
}

.section-dot i {
    font-size: 1.125rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.section-dot:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.section-dot:hover i {
    color: white;
}

.section-dot.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.section-dot.active i {
    color: white;
}

.section-dot::before {
    content: attr(title);
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%) translateX(100%);
    background: var(--gray-900);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
}

.section-dot:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(calc(100% + 10px));
}

/* Dark theme section indicator */
[data-theme="dark"] .section-dot {
    background: rgba(31, 41, 55, 0.9);
    border-color: var(--gray-600);
}

[data-theme="dark"] .section-dot i {
    color: #d1d5db;
}

[data-theme="dark"] .section-dot::before {
    background: var(--gray-700);
    color: #f9fafb;
}

/* Mobile responsive section indicator */
@media (max-width: 768px) {
    .section-indicator {
        left: 1rem;
    }

    .section-dot {
        width: 45px;
        height: 45px;
    }

    .section-dot i {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .section-indicator {
        left: 0.75rem;
        bottom: 6rem;
        top: auto;
        transform: none;
    }

    .section-dots {
        flex-direction: row;
        justify-content: center;
        gap: 0.75rem;
    }

    .section-dot {
        width: 40px;
        height: 40px;
    }

    .section-dot::before {
        bottom: -10px;
        top: auto;
        right: 50%;
        transform: translateX(50%) translateY(100%);
    }

    .section-dot:hover::before {
        transform: translateX(50%) translateY(calc(100% + 10px));
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease-out;
}

.animate-slideUp {
    animation: slideUp 0.5s ease-out;
}