/* ============================================
   PCOSense Website Styles
   ============================================ */

/* CSS Variables */
:root {
    /* Primary Colors - Soft Teal */
    --primary: #4A9B9B;
    --primary-light: #7BCBCB;
    --primary-dark: #1A6D6D;
    --primary-container: #D4EDED;

    /* Secondary Colors - Soft Lavender */
    --secondary: #9B7CA9;
    --secondary-light: #CCACD9;

    /* Tertiary Colors - Coral */
    --tertiary: #E07A5F;
    --tertiary-container: #FFE5DE;

    /* Neutral Colors */
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --surface-variant: #F3F3F3;
    --on-background: #1C1C1E;
    --on-surface: #1C1C1E;
    --on-surface-variant: #6B6B6B;
    --outline: #E0E0E0;

    /* Semantic Colors */
    --success: #2E7D32;
    --warning: #F57C00;
    --error: #BA1A1A;

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

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--background);
    color: var(--on-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

/* ============================================
   Container
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--on-background);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--on-surface-variant);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--primary-container);
    color: var(--primary-dark);
}

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

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

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--outline);
    padding: var(--spacing-md) 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--on-background);
}

.logo:hover {
    color: var(--on-background);
}

.logo-icon {
    color: var(--primary);
    font-size: 1.75rem;
}

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

.nav-links a {
    color: var(--on-surface-variant);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--on-background);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    padding: 8rem 0 6rem;
    background: linear-gradient(135deg, var(--surface) 0%, var(--primary-container) 100%);
    overflow: hidden;
}

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

.hero-content {
    max-width: 600px;
}

.hero h1 {
    margin-bottom: var(--spacing-lg);
}

.hero .highlight {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--on-surface-variant);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.hero-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--on-surface-variant);
    font-size: 0.9rem;
}

.privacy-badge {
    font-size: 1.1rem;
}

/* Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: var(--on-background);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    transform: rotate(3deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--surface);
    border-radius: 32px;
    overflow: hidden;
    padding: var(--spacing-lg);
}

.app-preview {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.preview-day {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--on-background);
}

.preview-status {
    font-size: 0.75rem;
    color: var(--primary);
    background: var(--primary-container);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

.preview-chart {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: var(--spacing-lg) 0;
}

.chart-bar {
    flex: 1;
    background: var(--primary-container);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: var(--transition-normal);
}

.chart-bar.active {
    background: var(--primary);
}

.preview-insight {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--surface-variant);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--on-background);
}

.insight-icon {
    width: 24px;
    height: 24px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* Hero Wave */
.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    line-height: 0;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
}

/* ============================================
   Section Styles
   ============================================ */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-header p {
    font-size: 1.1rem;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--surface-variant);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--outline);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
    color: var(--on-background);
}

.feature-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
}

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

.timeline-item {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    position: relative;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 24px;
    top: 60px;
    bottom: -32px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--primary-container));
}

.timeline-marker {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.timeline-content {
    flex: 1;
    padding-top: var(--spacing-sm);
}

.timeline-content h3 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    margin-bottom: var(--spacing-md);
}

.timeline-content ul {
    list-style: none;
}

.timeline-content li {
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--on-surface-variant);
    margin-bottom: var(--spacing-sm);
}

.timeline-content li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* ============================================
   Quote Section
   ============================================ */
.quote-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
}

.quote-section blockquote {
    max-width: 600px;
    margin: 0 auto;
}

.quote-section p {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: white;
    font-style: italic;
    line-height: 1.5;
    margin: 0;
}

.quote-section strong {
    font-style: normal;
}

/* ============================================
   Privacy Section
   ============================================ */
.privacy-section {
    padding: var(--spacing-3xl) 0;
    background: var(--surface-variant);
}

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

.privacy-text h2 {
    margin-bottom: var(--spacing-lg);
}

.privacy-list {
    margin: var(--spacing-xl) 0;
}

.privacy-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--on-surface);
}

.check-icon {
    color: var(--success);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.privacy-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.shield-icon {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-container) 0%, var(--surface) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.shield-icon span {
    font-size: 5rem;
}

/* ============================================
   Download Section
   ============================================ */
.download-section {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    margin-bottom: var(--spacing-md);
}

.download-content > p {
    margin-bottom: var(--spacing-xl);
    font-size: 1.1rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.store-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--on-background);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.store-button:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.store-label {
    font-size: 0.7rem;
    opacity: 0.8;
}

.store-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.download-note {
    color: var(--on-surface-variant);
    font-size: 0.9rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--on-background);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo-icon {
    color: var(--primary-light);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-column h4 {
    color: white;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom .disclaimer {
    font-size: 0.75rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Legal Pages (Privacy, Terms)
   ============================================ */
.legal-page {
    padding: 8rem 0 var(--spacing-3xl);
}

.legal-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
}

.legal-header:first-of-type {
    padding-top: 0;
}

.last-updated {
    color: var(--on-surface-variant);
    font-size: 0.9rem;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-section {
    margin-bottom: var(--spacing-2xl);
}

.legal-section h2 {
    font-size: 1.5rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

.legal-section ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.legal-section li {
    list-style: disc;
    margin-bottom: var(--spacing-sm);
    color: var(--on-surface-variant);
}

.legal-section a {
    color: var(--primary);
}

.highlight-box {
    background: var(--primary-container);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
}

.highlight-box h3 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
}

.highlight-box ul {
    margin: 0;
    padding-left: var(--spacing-xl);
}

.highlight-box li {
    color: var(--on-background);
}

.warning-box {
    background: var(--tertiary-container);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
    border-left: 4px solid var(--tertiary);
}

.warning-box h3 {
    color: var(--tertiary);
    margin-bottom: var(--spacing-sm);
}

.warning-box p {
    color: var(--on-background);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar .container {
        position: relative;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-top: 1px solid var(--outline);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

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

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

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

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

    .phone-mockup {
        width: 240px;
        height: 480px;
        transform: none;
    }

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

    .timeline-item {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .timeline-item::after {
        display: none;
    }

    .privacy-content {
        grid-template-columns: 1fr;
    }

    .privacy-visual {
        order: -1;
    }

    .shield-icon {
        width: 150px;
        height: 150px;
    }

    .shield-icon span {
        font-size: 4rem;
    }

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

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .hero {
        padding: 6rem 0 4rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        width: 100%;
    }

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

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

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

.hero-content,
.hero-image,
.feature-card,
.timeline-item {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.3s; }
.timeline-item:nth-child(3) { animation-delay: 0.5s; }