:root{--navy: #0d2348;--navy2: #163a6e;--navy3: #1e4f9c;--border: #dde3f0;--bg: #f2f5fa;--text: #111827;--muted: #6b7a99}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text)}.header{position:fixed;top:0;left:0;width:100%;background:transparent;color:#fff;padding:1rem 0;z-index:100;transition:background .3s ease,box-shadow .3s ease}.header.scrolled{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 55%,var(--navy3) 100%);box-shadow:0 2px 16px #0d234859}.container{max-width:1200px;margin:0 auto;padding:0 20px}.nav{display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:15px}.logo-img{height:60px;width:auto;object-fit:contain}.logo h1{font-size:1.5rem;font-weight:600}.nav-links{display:flex;gap:30px;list-style:none}.nav-links a{color:#fff;text-decoration:none;font-weight:500;transition:opacity .3s}.nav-links a:hover{opacity:.8}.btn-login{padding:8px 20px;border:2px solid white;border-radius:5px;transition:all .3s}.btn-login:hover{background:#fff;color:var(--navy)}.btn-register{padding:8px 20px;background:var(--navy2);color:#fff;border-radius:5px;border:2px solid var(--navy3);transition:all .3s}.btn-register:hover{background:var(--navy3);border-color:#4d7fce}.hero{background:linear-gradient(#0d234873,#163a6e73),url(/images/reef-banner.jpg);background-size:cover;background-position:center 40%;background-repeat:no-repeat;min-height:620px;display:flex;align-items:center;justify-content:center;padding:140px 20px 80px;color:#fff;text-align:center}.hero h2{font-size:3rem;margin-bottom:20px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.hero p{font-size:1.3rem;margin-bottom:30px;text-shadow:1px 1px 2px rgba(0,0,0,.3)}.btn{display:inline-block;padding:15px 40px;background:var(--navy2);color:#fff;text-decoration:none;border-radius:5px;font-weight:600;transition:background .3s,transform .2s;box-shadow:0 4px 15px #0000004d;border:2px solid var(--navy3)}.btn:hover{background:var(--navy3);transform:translateY(-2px)}.btn-secondary{background:transparent;color:#fff;margin-left:15px;border:2px solid rgba(255,255,255,.6)}.btn-secondary:hover{background:#ffffff1a}.features{padding:80px 20px;background:var(--bg)}.features h3{text-align:center;font-size:2.5rem;margin-bottom:50px;color:var(--navy)}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;max-width:1200px;margin:0 auto}.feature-card{background:#fff;padding:30px;border-radius:10px;box-shadow:0 5px 20px #0000001a;transition:transform .3s,box-shadow .3s;text-align:center}.feature-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px #00000026}.feature-icon{font-size:3rem;margin-bottom:20px;color:var(--navy3)}.feature-card h4{font-size:1.5rem;margin-bottom:15px;color:var(--navy)}.feature-card p{color:var(--muted);line-height:1.8}.info-section{padding:80px 20px;background:#fff}.info-content{max-width:800px;margin:0 auto;text-align:center}.info-content h3{font-size:2.5rem;margin-bottom:30px;color:var(--navy)}.info-content p{font-size:1.1rem;color:var(--muted);margin-bottom:20px;line-height:1.8}.footer{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 55%,var(--navy3) 100%);color:#fff;padding:40px 20px;text-align:center}.footer p{margin-bottom:10px}@media(max-width:768px){.hero{min-height:480px;background-position:center 50%;padding-top:110px}.hero h2{font-size:2rem}.hero p{font-size:1.1rem}.nav-links{flex-direction:row;gap:8px;flex-shrink:0}.btn-login,.btn-register{padding:6px 12px;font-size:.85rem}.logo h1{font-size:1rem}.logo small{font-size:.75rem}.logo-img{height:40px}.btn-secondary{margin-left:0;margin-top:10px}}