/* ========================================= */
/* MEJA77 | Style CSS - Perpustakaan Digital Futuristik */
/* Tema Warna: Dark Red Online Shopping */
/* ========================================= */

/* --- 1. Variabel dan Reset Dasar --- */
:root {
    --color-primary: #121212;      /* Background Utama: Sangat Gelap (Mendalam) */
    --color-secondary: #1E1E1E;    /* Background Sekunder: Kontras Ringan */
    --color-accent: #8B0000;       /* Dark Red/Maroon: Aksen Utama */
    --color-text-light: #E0E0E0;   /* Teks Utama: Putih Pudar */
    --color-text-muted: #888888;   /* Teks Sekunder/Mute */
    --font-family-primary: 'Roboto', 'Arial', sans-serif;
    --transition-speed: 0.3s;
    --border-radius-card: 4px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    font-family: var(--font-family-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: #FF4500; /* Orange Red saat hover untuk kontras */
}

/* --- 2. Tipografi & Heading --- */
h1, h2, h3, h4 {
    color: var(--color-text-light);
    margin-bottom: 0.5em;
    font-weight: 700;
}

h1 { font-size: 2.5em; }
h2 { font-size: 2em; border-bottom: 2px solid var(--color-accent); padding-bottom: 5px; }
h3 { font-size: 1.5em; color: var(--color-accent); }

.lead {
    font-size: 1.2em;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

/* --- 3. Header & Navigasi --- */
.header {
    background-color: var(--color-secondary);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo a {
    font-size: 1.8em;
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--color-accent);
}

.main-nav {
    display: none; /* Default tersembunyi untuk mobile */
}

.nav-link {
    color: var(--color-text-light);
    padding: 8px 15px;
    text-transform: uppercase;
    font-size: 0.9em;
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    transition: width var(--transition-speed);
}

.nav-link:hover:after {
    width: 100%;
}

/* --- 4. Tombol (CTA) --- */
.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-light);
    border: none;
    padding: 12px 25px;
    text-transform: uppercase;
    font-weight: bold;
    border-radius: var(--border-radius-card);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(139, 0, 0, 0.5); /* Efek glow gelap */
    transition: all var(--transition-speed);
}

.btn-primary:hover {
    background-color: #A020F0; /* Merah gelap saat hover */
    box-shadow: 0 6px 20px rgba(139, 0, 0, 0.8);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 12px 25px;
    border-radius: var(--border-radius-card);
    transition: all var(--transition-speed);
}

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-text-light);
}

/* --- 5. Konten Utama & Section --- */
main {
    padding-top: 20px;
    padding-bottom: 50px;
}

.section-grid {
    display: grid;
    gap: 30px;
    margin-top: 30px;
    padding: 20px 0;
}

.card-future {
    background-color: var(--color-secondary);
    padding: 25px;
    border-radius: var(--border-radius-card);
    border: 1px solid #333333;
    transition: border var(--transition-speed), transform var(--transition-speed);
}

.card-future:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

/* --- 6. Halaman Home (Hero Section) --- */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('/assets/bg-digital-library.jpg'); /* Ganti dengan gambar perpustakaan digital Anda */
    background-size: cover;
    background-position: center;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3em;
    margin-bottom: 15px;
}

.hero .sub-headline {
    margin-bottom: 40px;
}

/* --- 7. Formulir (Halaman Kontak) --- */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--color-accent);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #444444;
    background-color: #282828;
    color: var(--color-text-light);
    border-radius: var(--border-radius-card);
    transition: border-color var(--transition-speed);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--color-accent);
    outline: none;
    box-shadow: 0 0 5px rgba(139, 0, 0, 0.5);
}

/* --- 8. Blog & Produk (Kartu) --- */
.blog-post h2 a, .product-card h3 {
    color: var(--color-text-light);
    font-size: 1.3em;
}

.blog-post .meta {
    color: var(--color-text-muted);
    font-size: 0.85em;
    margin-bottom: 15px;
}

.product-card .price {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--color-accent);
    margin: 15px 0;
}

/* --- 9. Footer --- */
.footer {
    background-color: #0A0A0A; /* Lebih gelap dari primary */
    padding: 30px 0;
    border-top: 1px solid #333;
    text-align: center;
    font-size: 0.9em;
}

.footer-links a {
    color: var(--color-text-muted);
    margin: 0 10px;
    transition: color var(--transition-speed);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* ========================================= */
/* --- 10. Mobile Responsiveness (@media) --- */
/* ========================================= */

/* Tablet & Desktop Layout (Min-Width 768px) */
@media (min-width: 768px) {
    /* Navigasi: Tampilkan Menu */
    .main-nav {
        display: flex;
        gap: 25px;
        align-items: center;
    }
    
    /* Tata Letak Grid: Dari 1 kolom menjadi 3 kolom */
    .section-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    /* Tata Letak Kontak */
    .contact-grid {
        grid-template-columns: 2fr 1fr;
    }
    
    /* Halaman Produk Detail */
    .product-layout {
        display: flex;
        gap: 40px;
        align-items: flex-start;
    }
    .product-image-area {
        flex: 1;
    }
    .product-info-area {
        flex: 2;
    }
}