/* ==================================== */
/* 1. Pengaturan Dasar dan Tema Warna Biru-Abu */
/* ==================================== */

:root {
    --color-primary: #1e3a8a;     /* Biru Navy Gelap (Header) */
    --color-secondary: #f3f4f6;   /* Abu-abu Sangat Muda (Background) */
    --color-accent: #3b82f6;      /* Biru Cerah (Tombol/Aksen) */
    --color-text-dark: #1f2937;
    --color-text-light: white;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--color-secondary);
    color: var(--color-text-dark);
    line-height: 1.6;
}

/* ==================================== */
/* 2. Header dan Navigasi */
/* ==================================== */

header {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    padding: 15px 20px;
    display: flex; 
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 25px;
    color: #fff;
    font-weight: bold;
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 1px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex; 
    gap: 25px;
}

nav a {
    color: var(--color-text-light);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover,
nav a.active {
    background-color: #254d9c; 
}

/* ==================================== */
/* 3. Layout Konten Utama dan Grid */
/* ==================================== */

main {
    padding: 20px;
    max-width: 1200px;
    margin: 20px auto;
    background-color: white; 
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

.hero {
    background-color: #bfdbfe; /* Biru sangat muda untuk Hero */
    padding: 40px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 30px;
}

.button {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 15px;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #2563eb;
}

/* Penggunaan Grid untuk Produk */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.grid-item {
    background-color: #e5e7eb;
    padding: 20px;
    border-radius: 5px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.grid-item img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 10px;
}

/* ==================================== */
/* 4. Footer */
/* ==================================== */

footer {
    background-color: #1f2937; /* Abu-abu Gelap */
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 120px;
}

/* ==================================== */
/* 5. Responsif */
/* ==================================== */

@media (max-width: 768px) {
    header {
        flex-direction: column; 
        text-align: center;
    }

    nav ul {
        flex-direction: column; 
        gap: 5px;
        width: 100%;
    }
}