/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Arial, sans-serif;
}

/* WARNA UTAMA */
:root {
    --blue-dark: #0a3d62;
    --blue-main: #1e90ff;
    --blue-light: #eaf4ff;
    --text-dark: #333;
}

/* GLOBAL */
body {
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

.section {
    padding: 60px 0;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--blue-dark);
}

/* HEADER */
.header {
    background: linear-gradient(to right, var(--blue-dark), var(--blue-main));
    color: white;
    padding: 80px 0;
    text-align: center;
}

.logo {
    font-size: 42px;
    font-weight: bold;
}

.logo span {
    color: #ffd700;
}

.tagline {
    margin-top: 10px;
    font-size: 18px;
}

/* GRID & CARD */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.card h3, .card h4 {
    color: var(--blue-main);
    margin-bottom: 10px;
}

/* SECTION WARNA */
.blue-light {
    background-color: var(--blue-light);
}

.blue-dark {
    background-color: var(--blue-dark);
    color: white;
}

.blue-dark h2 {
    color: white;
}

/* FOOTER */
.footer {
    background: #081f33;
    color: white;
    text-align: center;
    padding: 15px 0;
    font-size: 14px;
}