/* ========================================
   Health AI Landing Page - Modern Design
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #0A0E27;
    --color-bg-secondary: #111632;
    --color-bg-tertiary: #1A1F3A;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --gradient-secondary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-accent: linear-gradient(135deg, #EC4899 0%, #F59E0B 100%);

    /* Text Colors */
    --color-text-primary: #F9FAFB;
    --color-text-secondary: #9CA3AF;
    --color-text-muted: #6B7280;

    /* Accent Colors */
    --color-primary: #6366F1;
    --color-secondary: #8B5CF6;
    --color-accent: #EC4899;
    --color-success: #10B981;
    --color-warning: #F59E0B;

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

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.4);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

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

.nav-links a:hover::after {
    width: 100%;
}

.btn-login {
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: white !important;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-login::after {
    display: none !important;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

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

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: #0A0E27;
    /* Fully opaque for visibility */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    /* Safari support */
    padding: var(--spacing-lg);
    flex-direction: column;
    gap: var(--spacing-md);
    border-bottom: 2px solid rgba(99, 102, 241, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    opacity: 0;
    transform: translateY(-20px);
    transition: all var(--transition-base);
}

.mobile-menu.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #6366F1 0%, transparent 70%);
    top: -200px;
    left: -100px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
    bottom: -150px;
    right: -50px;
    animation-delay: -10s;
}

.gradient-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(to right, rgba(99, 102, 241, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
}

@keyframes float {

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

    25% {
        transform: translate(50px, 30px) rotate(5deg);
    }

    50% {
        transform: translate(0, 60px) rotate(-5deg);
    }

    75% {
        transform: translate(-50px, 30px) rotate(3deg);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

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

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.hero-visual {
    position: relative;
}

.hero-image-container {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

.floating-card {
    position: absolute;
    background: rgba(17, 22, 50, 0.9);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
    box-shadow: var(--shadow-xl);
}

.floating-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.card-1 {
    top: 10%;
    left: -10%;
    animation: float 6s ease-in-out infinite;
}

.card-2 {
    top: 50%;
    right: -10%;
    animation: float 7s ease-in-out infinite;
    animation-delay: -2s;
}

.card-3 {
    bottom: 10%;
    left: 10%;
    animation: float 8s ease-in-out infinite;
    animation-delay: -4s;
}

.card-icon {
    font-size: var(--font-size-2xl);
}

.card-title {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.card-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
}

/* ========================================
   ECG Section
   ======================================== */

.ecg-section {
    padding: var(--spacing-3xl) 0;
    background-image: linear-gradient(rgba(10, 10, 10, 0.8), rgba(10, 10, 10, 0.9)), url('assets/hero-fitness.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.ecg-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ecg-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

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

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.feature-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.feature-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========================================
   AI Visual Section
   ======================================== */

.ai-visual {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, transparent 100%);
}

.ai-visual-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.ai-image-container {
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.ai-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

.ai-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.ai-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.ai-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.ai-feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
}

/* ========================================
   How It Works Section
   ======================================== */

.how-it-works {
    padding: var(--spacing-3xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
    align-items: center;
}

.step-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.step-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.step-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
}

.step-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.step-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========================================
   Download Section
   ======================================== */

.download {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.download-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.download-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.store-badges {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.store-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.store-badge:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.badge-text {
    display: flex;
    flex-direction: column;
}

.badge-small {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.badge-large {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
}

.download-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.text-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.text-link:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

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

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, #1A1F3A 0%, #0A0E27 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg-secondary);
    border-radius: 32px;
    overflow: hidden;
}

.app-preview {
    padding: var(--spacing-lg);
}

.preview-header {
    margin-bottom: var(--spacing-lg);
}

.preview-greeting {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 4px;
}

.preview-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.preview-metric {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}

.metric-value {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.metric-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.metric-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.preview-insight {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.insight-icon {
    font-size: var(--font-size-xl);
}

.insight-text {
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
}

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

.footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    grid-column: 2 / 5;
}

.footer-column h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.footer-column a {
    display: block;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.footer-tech {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tech-badge {
    padding: 4px 8px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-primary);
}

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

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text {
        order: 1;
    }

    .hero-visual {
        order: 2;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

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

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

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

    .store-badges {
        justify-content: center;
    }

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

    .step-arrow {
        transform: rotate(90deg);
    }

    /* Keep footer columns in grid on tablet */
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

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

    .download-title {
        font-size: var(--font-size-3xl);
    }

    .ai-title {
        font-size: var(--font-size-3xl);
    }

    /* Keep Product, Company, Support side by side, logo on top */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-brand {
        grid-column: 1;
        margin-bottom: var(--spacing-md);
    }

    .footer-links {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .store-badges {
        flex-direction: column;
    }

    .store-badge {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}