/* Palette: Navy Blue, White, Silver, Dark Text */
:root {
    --primary: #0a2342;
    --primary-light: #1c3d6e;
    --accent: #ffffff;
    --text: #333333;
    --bg-light: #f4f6f8;
    --border: #e0e0e0;
    
    --font-serif: 'Roboto Slab', serif;
    --font-sans: 'Open Sans', sans-serif;
}

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

body {
    background-color: var(--bg-light);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.6;
}

.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.section-padding { padding: 100px 0; }
a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; height: auto; display: block; }

/* Top Bar */
.top-bar { background: #05162b; color: #ccc; font-size: 0.85rem; padding: 8px 0; }
.top-flex { display: flex; justify-content: flex-end; gap: 20px; }
.top-link:hover { color: #fff; text-decoration: underline; }

/* Header */
.main-header { background: var(--accent); padding: 20px 0; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.header-row { display: flex; justify-content: space-between; align-items: center; }

.logo { font-family: var(--font-serif); font-size: 1.8rem; color: var(--primary); font-weight: 700; letter-spacing: 1px; }
.blue-box { background: var(--primary); color: var(--accent); padding: 2px 8px; margin-left: 5px; }

.nav-menu a { margin-left: 30px; font-weight: 600; color: var(--text); font-size: 0.95rem; text-transform: uppercase; }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary); }

.btn-header { background: var(--primary); color: var(--accent); padding: 10px 20px; border-radius: 4px; font-weight: 700; font-size: 0.9rem; margin-left: 30px; }
.btn-header:hover { background: var(--primary-light); }

.mobile-toggle { display: none; background: transparent; border: none; font-size: 1.5rem; cursor: pointer; color: var(--primary); }

/* Mobile Nav */
.mobile-nav { position: fixed; top: 0; right: -100%; width: 280px; height: 100%; background: var(--primary); z-index: 2000; padding: 40px; transition: 0.4s; }
.mobile-nav.active { right: 0; }
.close-btn { background: none; border: none; font-size: 1.5rem; color: var(--accent); margin-bottom: 20px; cursor: pointer; }
.mobile-nav a { display: block; color: var(--accent); font-family: var(--font-serif); font-size: 1.2rem; margin-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 10px; }

@media (max-width: 900px) {
    .nav-menu, .btn-header { display: none; }
    .mobile-toggle { display: block; }
    .top-flex { justify-content: center; font-size: 0.7rem; }
}

/* Hero */
.hero-section { height: 80vh; position: relative; display: flex; align-items: center; justify-content: center; text-align: center; color: var(--accent); }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-size: cover; background-position: center; z-index: 0; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(10, 35, 66, 0.7); z-index: 1; }
.hero-content { position: relative; z-index: 2; max-width: 800px; }

.tag { background: rgba(255,255,255,0.2); padding: 5px 15px; border-radius: 20px; font-size: 0.8rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 20px; display: inline-block; }
.hero-content h1 { font-family: var(--font-serif); font-size: 4rem; line-height: 1.1; margin-bottom: 25px; }
.hero-content p { font-size: 1.3rem; margin-bottom: 40px; font-weight: 400; opacity: 0.9; }

.hero-buttons { display: flex; justify-content: center; gap: 20px; }
.btn-primary { background: var(--accent); color: var(--primary); padding: 15px 40px; font-weight: 700; border-radius: 4px; transition: 0.3s; }
.btn-primary:hover { background: #e0e0e0; }
.btn-secondary { border: 2px solid var(--accent); color: var(--accent); padding: 13px 40px; font-weight: 700; border-radius: 4px; transition: 0.3s; }
.btn-secondary:hover { background: var(--accent); color: var(--primary); }

/* Topics */
.section-head h2 { font-family: var(--font-serif); font-size: 2.5rem; color: var(--primary); margin-bottom: 15px; }
.divider { width: 60px; height: 4px; background: var(--primary); margin: 0 auto 40px; }
.divider.left { margin: 0 0 30px 0; }
.text-center { text-align: center; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.topic-card { background: var(--accent); padding: 40px; border-radius: 4px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: 0.3s; text-align: center; border-bottom: 3px solid transparent; }
.topic-card:hover { transform: translateY(-5px); border-bottom-color: var(--primary); }
.icon { font-size: 3rem; margin-bottom: 20px; }
.topic-card h3 { font-family: var(--font-serif); font-size: 1.3rem; margin-bottom: 10px; color: var(--primary); }

/* Stats Banner */
.stats-banner { background: var(--primary); color: var(--accent); padding: 60px 0; margin-top: 50px; }
.stats-flex { display: flex; justify-content: space-around; text-align: center; }
.stat strong { font-family: var(--font-serif); font-size: 3rem; display: block; line-height: 1; margin-bottom: 5px; }
.stat span { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px; opacity: 0.8; }

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text h1 { font-family: var(--font-serif); font-size: 3rem; color: var(--primary); margin-bottom: 20px; }
.check-list { list-style: none; margin-top: 30px; }
.check-list li { margin-bottom: 15px; padding-left: 25px; position: relative; font-weight: 600; color: var(--text); }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); }
.about-img img { border-radius: 4px; box-shadow: 20px 20px 0 rgba(10, 35, 66, 0.1); }

/* Speakers */
.speaker-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.speaker-card { background: var(--accent); border: 1px solid var(--border); overflow: hidden; border-radius: 4px; }
.s-img { height: 300px; background-size: cover; background-position: center; filter: grayscale(20%); transition: 0.3s; }
.speaker-card:hover .s-img { filter: grayscale(0%); }
.s-info { padding: 25px; text-align: center; }
.s-info h3 { font-family: var(--font-serif); color: var(--primary); margin-bottom: 5px; font-size: 1.2rem; }
.s-info span { font-size: 0.85rem; color: #666; font-weight: 700; display: block; margin-bottom: 15px; }
.s-info p { font-style: italic; font-size: 0.9rem; color: #555; }

/* Contact */
.contact-container { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; background: var(--accent); padding: 60px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); border-radius: 4px; }
.contact-details h2 { font-family: var(--font-serif); font-size: 2.5rem; color: var(--primary); margin-bottom: 20px; }
.info-block { margin-top: 30px; }
.info-block strong { display: block; color: var(--primary); font-size: 0.9rem; margin-bottom: 5px; }

.formal-form .form-group { margin-bottom: 20px; }
.formal-form label { display: block; font-weight: 700; color: var(--text); margin-bottom: 5px; font-size: 0.9rem; }
.formal-form input, .formal-form select { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; font-family: var(--font-sans); }
.formal-form input:focus { border-color: var(--primary); outline: none; }
.full { width: 100%; }

/* Legal */
.legal-doc { max-width: 800px; margin: 0 auto; background: var(--accent); padding: 60px; border-radius: 4px; }
.legal-doc h1 { font-family: var(--font-serif); color: var(--primary); }

/* Footer */
.main-footer { background: #0a2342; color: #aab7c4; padding: 60px 0 20px; margin-top: 100px; }
.footer-content { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
.f-col h4 { color: var(--accent); font-family: var(--font-serif); margin-bottom: 5px; }
.f-links a { margin-left: 20px; color: #aab7c4; }
.f-links a:hover { color: var(--accent); }
.copyright { text-align: center; font-size: 0.8rem; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; }

@media (max-width: 900px) {
    .hero-content h1 { font-size: 2.5rem; }
    .hero-buttons { flex-direction: column; }
    .grid-3, .stats-flex, .about-grid, .speaker-grid, .contact-container { grid-template-columns: 1fr; }
    .stats-flex { gap: 30px; }
    .footer-content { flex-direction: column; gap: 20px; text-align: center; }
}