/* --- Root Variables (Pusat Kendali Warna) --- */
:root {
    --cyber-gradient: linear-gradient(124deg, #00e9ff, #0202ed, #0202ed, #0202ed, #00b1ff, #0202ed, #0202ed, #00f8ff, #0202ed, #0202ed, #00c8ff);
    --dark-base: #02050a;
    --glass-bg: rgba(2, 2, 237, 0.1);
    --text-silver: #e0e0e0;
    --accent-cyan: #00f8ff;
}

/* --- Dasar Desain --- */
body {
    font-family: 'Rajdhani', sans-serif;
    background-color: var(--dark-base);
    color: var(--text-silver);
    margin: 0;
    overflow-x: hidden;
    line-height: 1.6;
}

body::before {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, #0202ed15 0%, transparent 80%);
    z-index: -1;
}

/* --- Header & Typography --- */
header {
    background: var(--cyber-gradient);
    padding: 60px 20px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(2, 2, 237, 0.4);
}

header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.5rem;
    margin: 0;
    color: #fff;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
    letter-spacing: 5px;
}

header p {
    font-size: 1.2rem;
    color: #fff;
    font-weight: bold;
    text-transform: uppercase;
}

/* --- Layout Container --- */
.container {
    max-width: 1100px;
    margin: -40px auto 50px auto;
    padding: 0 20px;
}

/* --- Grid System & Cards --- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 233, 255, 0.2);
    padding: 25px;
    border-radius: 0 20px 0 20px;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: 0 0 15px rgba(2, 2, 237, 0.5);
}

.card h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--accent-cyan);
    margin-top: 0;
}

/* --- Buttons --- */
.btn-action {
    display: inline-block;
    width: 100%;
    text-align: center;
    background: var(--cyber-gradient);
    background-size: 200%;
    color: #fff;
    padding: 12px 0;
    margin-top: 15px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: 0.5s;
    text-transform: uppercase;
}

.btn-action:hover {
    background-position: right;
    box-shadow: 0 0 15px var(--accent-cyan);
}

/* --- Article Section --- */
.main-info {
    background: rgba(255, 255, 255, 0.03);
    padding: 40px;
    margin-top: 40px;
    border-radius: 15px;
    border-left: 5px solid var(--accent-cyan);
}

.main-info h2, .main-info h3 {
    font-family: 'Orbitron', sans-serif;
    color: var(--accent-cyan);
}

.highlight-box {
    background: rgba(0, 233, 255, 0.05);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid rgba(0, 233, 255, 0.1);
    margin: 20px 0;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 40px;
    border-top: 1px solid #0202ed;
    color: #5558b0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    header h1 { font-size: 2.2rem; }
}