/* TEMA WARNA: Biru Monokromatik (Navy & Sky Blue) */
:root {
    --navy-blue: #0A2540;
    --sky-blue: #63B3ED;
    --light-bg: #F7FAFC;
    --white: #FFFFFF;
    --text-dark: #2D3748;
    --text-muted: #718096;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--light-bg); color: var(--text-dark); line-height: 1.6; }

/* LAYOUT UMUM (Mobile First) */
.container { width: 92%; max-width: 1200px; margin: 0 auto; }

/* HEADER & NAVIGASI */
header { background-color: var(--navy-blue); color: var(--white); padding: 15px 0; position: sticky; top: 0; z-index: 100; }
.nav-container { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.logo { font-size: 1.2rem; font-weight: bold; text-align: center;}
.logo span { color: var(--sky-blue); }
nav ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; }
nav a { color: var(--white); text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
nav a:hover { color: var(--sky-blue); }

/* HERO SECTION */
.hero { 
    background: linear-gradient(rgba(10, 37, 64, 0.8), rgba(10, 37, 64, 0.8)), url('hero-bg.jpg') center/cover;
    color: var(--white); text-align: center; padding: 80px 20px; 
}
.hero h1 { font-size: 2.5rem; margin-bottom: 10px; color: var(--sky-blue); }
.hero h2 { font-size: 1.2rem; font-weight: 300; margin-bottom: 25px; }
.btn-cta { background-color: var(--sky-blue); color: var(--navy-blue); padding: 12px 25px; text-decoration: none; font-weight: bold; border-radius: 30px; display: inline-block; margin-top: 15px; transition: transform 0.2s; }
.btn-cta:hover { transform: scale(1.05); }

/* QUICK LINKS */
.quick-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; padding: 40px 0; background: var(--white); margin-top: -20px; position: relative; border-radius: 10px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.quick-item { text-align: center; width: 100px; }
.icon-circle { width: 60px; height: 60px; background: var(--sky-blue); color: var(--navy-blue); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; font-weight: bold; }
.quick-item span { font-size: 0.8rem; font-weight: 600; }

/* SECTIONS */
section { padding: 50px 0; }
.section-title { text-align: center; color: var(--navy-blue); font-size: 1.8rem; margin-bottom: 30px; }
.grid-cards { display: grid; grid-template-columns: 1fr; gap: 20px; }
.card { background: var(--white); padding: 20px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); border-top: 4px solid var(--navy-blue); }

/* FOOTER */
footer { background: var(--navy-blue); color: var(--white); text-align: center; padding: 30px 20px; margin-top: 40px; }
footer .slogan { font-size: 1.2rem; font-weight: bold; color: var(--sky-blue); margin-bottom: 15px; }

/* RESPONSIVE (Laptop/Desktop) */
@media (min-width: 768px) {
    .nav-container { flex-direction: row; justify-content: space-between; }
    .hero { padding: 120px 20px; }
    .hero h1 { font-size: 3.5rem; }
    .grid-cards { grid-template-columns: repeat(3, 1fr); }
}