/* ============================================
   MAIN STYLES - Pregnancy Checker
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #FF6B9D;
    --primary-dark: #C44569;
    --primary-light: #FFC1CC;
    --secondary: #A29BFE;
    --success: #00B894;
    --warning: #FDCB6E;
    --text-dark: #2D3436;
    --text-gray: #636E72;
    --text-light: #DFE6E9;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 30px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    opacity: 1;
    visibility: visible;
    display: block;
}

body.loaded {
    opacity: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 32px;
    font-weight: 600;
}

h3 {
    font-size: 24px;
    font-weight: 600;
}

h4 {
    font-size: 20px;
    font-weight: 500;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

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

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

a:focus {
    outline: 3px solid rgba(255, 107, 157, 0.3);
    outline-offset: 2px;
}

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

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

/* Skip Link (Accessibility) */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: var(--spacing-sm);
    z-index: 1000;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Header */
.site-header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    min-height: 70px;
}

.navbar-brand a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.navbar-brand i {
    font-size: 28px;
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.navbar-menu li a {
    font-weight: 500;
    color: var(--text-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.navbar-menu li a:hover {
    background: var(--bg-light);
    color: var(--primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    width: 32px;
    height: 32px;
    justify-content: center;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

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

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    color: white;
}

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

.hero-title {
    font-size: 42px;
    color: white;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s ease;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    animation: fadeInUp 0.8s ease;
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 14px;
    animation: fadeInUp 1s ease;
}

/* Features Section */
.features-section {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 32px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-gray);
    margin-bottom: 0;
}

/* Footer */
.site-footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 18px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: white;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

.medical-notice {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 800px;
    margin: 0 auto;
}

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

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Responsive Typography */
@media (max-width: 767px) {
    h1 {
        font-size: 32px;
    }
    
    h2 {
        font-size: 26px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    body {
        font-size: 16px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
}