/* ============================================
   QuizIQ - Modern Brain Training Website
   Premium Design with Smooth Animations
   ============================================ */

/* CSS Variables & Design Tokens */
:root {
    /* Primary Colors */
    --primary-purple: #6C63FF;
    --primary-cyan: #00D9FF;
    --primary-red: #FF6B6B;
    --primary-green: #00E676;
    --primary-orange: #FFAB40;
    --primary-violet: #9C27B0;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6C63FF 0%, #00D9FF 100%);
    --gradient-warm: linear-gradient(135deg, #FF6B6B 0%, #FFAB40 100%);
    --gradient-cool: linear-gradient(135deg, #00E676 0%, #00D9FF 100%);
    --gradient-purple: linear-gradient(135deg, #9C27B0 0%, #6C63FF 100%);

    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #0A0A0F;
    --color-dark: #1A1A2E;
    --color-darker: #0F0F1E;
    --color-gray-100: #F5F7FA;
    --color-gray-200: #E4E7EB;
    --color-gray-300: #CDD5DF;
    --color-gray-400: #9AA5B1;
    --color-gray-500: #697386;
    --color-gray-600: #4D5563;
    --color-gray-700: #2D3748;
    --color-gray-800: #1A202C;
    --color-gray-900: #0F1419;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.3);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background: var(--color-darker);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Background Animation */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #0A0A0F 0%, #1A1A2E 100%);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--gradient-primary);
    top: -250px;
    right: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-warm);
    bottom: -200px;
    left: -200px;
    animation-delay: 7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: var(--gradient-cool);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(50px, -50px) scale(1.1);
    }

    66% {
        transform: translate(-30px, 30px) scale(0.9);
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-display);
    text-decoration: none;
    color: var(--color-white);
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--color-gray-300);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: 0 4px 16px rgba(108, 99, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108, 99, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-icon {
    font-size: 1.2em;
}

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(108, 99, 255, 0.15);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-cyan);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.badge-icon {
    font-size: 1.2em;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-gray-300);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--color-gray-400);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Phone Mockup */
.phone-mockup {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 320px;
    height: 650px;
    background: linear-gradient(145deg, #2D2D44, #1A1A2E);
    border-radius: 40px;
    padding: 12px;
    box-shadow:
        0 0 0 12px rgba(255, 255, 255, 0.05),
        0 30px 60px rgba(0, 0, 0, 0.4),
        inset 0 0 40px rgba(108, 99, 255, 0.1);
    position: relative;
    animation: phoneFloat 3s ease-in-out infinite;
}

@keyframes phoneFloat {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #0F0F1E 0%, #1A1A2E 100%);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
}

.app-preview {
    padding: 2rem 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    font-size: 0.75rem;
    color: var(--color-gray-400);
}

.preview-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.brain-animation {
    font-size: 5rem;
    margin-bottom: 1.5rem;
    animation: brain-pulse 2s ease-in-out infinite;
}

@keyframes brain-pulse {

    0%,
    100% {
        transform: scale(1);
        filter: drop-shadow(0 0 20px rgba(108, 99, 255, 0.5));
    }

    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 30px rgba(0, 217, 255, 0.7));
    }
}

.preview-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.preview-subtitle {
    color: var(--color-gray-400);
    margin-bottom: 2rem;
}

.preview-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.preview-category {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--category-color, #6C63FF);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--category-color, #6C63FF);
    font-weight: 600;
}

/* Section Styles */
section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(108, 99, 255, 0.15);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: var(--radius-full);
    color: var(--primary-cyan);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    line-height: 1.7;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(108, 99, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 0.05;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--feature-color, var(--primary-purple));
    background: linear-gradient(135deg, var(--feature-color, var(--primary-purple)), transparent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.feature-description {
    color: var(--color-gray-300);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* Categories Section */
.categories {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.category-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--cat-color, var(--primary-purple));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.category-card:hover {
    transform: translateY(-12px);
    border-color: var(--cat-color, var(--primary-purple));
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

.category-card:hover::before {
    transform: scaleX(1);
}

.category-header {
    position: relative;
    margin-bottom: 1.5rem;
}

.category-icon {
    font-size: 3rem;
    position: relative;
    z-index: 2;
    display: inline-block;
    animation: categoryBounce 2s ease-in-out infinite;
}

@keyframes categoryBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.category-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--cat-color, var(--primary-purple));
    border-radius: 50%;
    filter: blur(30px);
    opacity: 0.2;
    transition: opacity var(--transition-base);
}

.category-card:hover .category-glow {
    opacity: 0.4;
}

.category-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.category-desc {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
}

.category-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--color-gray-400);
}

.category-stats span {
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
}

/* How It Works Section */
.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.step {
    flex: 1;
    position: relative;
}

.step-number {
    font-size: 5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.15;
    position: absolute;
    top: -1rem;
    left: 0;
    line-height: 1;
}

.step-content {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}

.step-content:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(108, 99, 255, 0.3);
}

.step-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.step-description {
    color: var(--color-gray-300);
    line-height: 1.6;
}

.step-connector {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-purple), transparent);
    flex-shrink: 0;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.125rem;
    color: var(--color-gray-300);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.about-feature {
    display: flex;
    gap: 1rem;
}

.about-feature-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: 700;
    flex-shrink: 0;
}

.about-feature-text strong {
    display: block;
    margin-bottom: 0.25rem;
}

.about-feature-text p {
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

.stats-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(108, 99, 255, 0.3);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-card .stat-label {
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

/* Download Section */
.download {
    padding: 4rem 0;
}

.download-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    padding: 4rem;
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: center;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1));
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--color-white);
}

.download-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.store-button {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-white);
    text-decoration: none;
    transition: all var(--transition-base);
}

.store-button:hover {
    background: rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-4px);
}

.store-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.store-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.store-small {
    font-size: 0.75rem;
    opacity: 0.8;
}

.store-large {
    font-size: 1.125rem;
    font-weight: 700;
}

.download-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.download-visual {
    position: relative;
    width: 200px;
    height: 200px;
}

.floating-brain {
    font-size: 8rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: floatingBrain 3s ease-in-out infinite;
}

@keyframes floatingBrain {

    0%,
    100% {
        transform: translate(-50%, -50%) rotate(-10deg);
    }

    50% {
        transform: translate(-50%, -60%) rotate(10deg);
    }
}

.achievement-float {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-dark);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    animation: achievementFloat 3s ease-in-out infinite;
}

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

.achievement-2 {
    top: 50%;
    right: -30px;
    animation-delay: 1s;
}

.achievement-3 {
    bottom: 0;
    left: 0;
    animation-delay: 2s;
}

@keyframes achievementFloat {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-15px);
    }
}

/* Footer */
.footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-tagline {
    color: var(--color-gray-400);
    margin-top: 1rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-column a {
    display: block;
    color: var(--color-gray-400);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: color var(--transition-base);
}

.footer-column a:hover {
    color: var(--color-white);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

/* Animations - AOS Style */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-left"] {
    transform: translateX(-30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-right"] {
    transform: translateX(30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

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

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

    .hero-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-visual {
        order: -1;
    }

    .download-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .download-visual {
        display: none;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    .nav-links,
    .navbar .btn {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 8rem 0 4rem;
    }

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

    .hero-description {
        font-size: 1.125rem;
    }

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

    .hero-stats {
        gap: 2rem;
    }

    .phone-frame {
        width: 280px;
        height: 570px;
    }

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

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

    .steps {
        flex-direction: column;
    }

    .step-connector {
        width: 2px;
        height: 40px;
        background: linear-gradient(180deg, transparent, var(--primary-purple), transparent);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .download-card {
        padding: 3rem 2rem;
    }

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

    .download-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}