/* styles.css */

:root {
    /* Color Palette */
    --primary: #0466c8; /* Deep clinical blue/teal */
    --primary-dark: #004d99;
    --accent: #ff6b35; /* Hopeful coral/orange */
    --accent-hover: #e85a2a;
    
    --bg-light: #f8f9fa;
    --bg-dark: #121212;
    --text-main: #333333;
    --text-light: #f0f0f0;
    --text-muted: #6c757d;
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    --success: #28a745;
    --danger: #dc3545;

    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary);
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-muted);
}

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

.mt-4 {
    margin-top: 2rem;
}

.bg-light { background-color: var(--bg-light); }
.bg-dark { background-color: var(--bg-dark); }
.text-white { color: white; }
.text-light { color: var(--text-light); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: var(--font-primary);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.6);
}

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

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

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
}

.logo-accent {
    color: var(--accent);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(4,102,200,0.1) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    background-color: rgba(4, 102, 200, 0.1);
    color: var(--primary);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* Tracks */
.track-cards {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.track-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.track-header {
    padding: 30px;
    color: white;
}

.track-header h3 {
    margin: 0;
    font-size: 1.8rem;
}

.bg-gradient-blue {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.bg-gradient-orange {
    background: linear-gradient(135deg, #ff8c42, var(--accent));
}

.track-body {
    padding: 40px;
}

.check-list {
    list-style: none;
    margin-top: 20px;
}

.check-list li {
    position: relative;
    padding-left: 35px;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary);
    font-weight: bold;
    font-size: 1.2rem;
    background: rgba(4, 102, 200, 0.1);
    width: 25px;
    height: 25px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Eligibility */
.eligibility-content {
    background: linear-gradient(135deg, #ffffff, #f0f7ff);
    border-radius: 30px;
    padding: 60px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.05);
}

.criteria-box {
    background: white;
    padding: 30px;
    border-radius: 15px;
    border-left: 5px solid var(--success);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.criteria-box-exclude {
    border-left-color: var(--danger);
}

.criteria-box ul {
    list-style-position: inside;
    margin-top: 15px;
}

.criteria-box li {
    margin-bottom: 10px;
}

/* Benefits Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.benefit-item {
    text-align: center;
    padding: 30px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: transform 0.3s;
}

.benefit-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.1);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

/* Footer */
.footer {
    background: #0a0a0a;
    color: #ccc;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    border-bottom: 1px solid #333;
    padding-bottom: 40px;
}

.footer-brand h3 {
    color: white;
}

.footer-contact h4 {
    color: white;
}

.disclaimer {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 10px;
}

.copyright {
    font-size: 0.9rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    width: 90%;
    max-width: 620px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(-20px);
    transition: transform 0.3s;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: #888;
}

.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: var(--font-primary);
}

.bmi-hint {
    font-size: 0.8rem;
    margin-top: 4px;
    color: var(--text-muted);
}
.bmi-hint.invalid {
    color: var(--danger);
    font-weight: 600;
}

.form-feedback {
    margin-top: 15px;
    color: var(--success);
    font-weight: 600;
    text-align: center;
}

.hidden {
    display: none;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Participating Sites */
.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.site-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.site-card:hover {
    transform: translateY(-5px);
}

.site-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary);
}

.site-card h4 {
    color: var(--text-dark);
    font-size: 1.1rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.site-name {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.site-address {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile approach */
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .track-cards {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
    }
}