:root {
    --primary-color: #8b0000; /* Merah Utama PT ABT Danie Group */
    --primary-dark: #5c0000;  /* Merah Gelap untuk Gradient/Hover */
    --accent-color: #a71d2a;   /* Merah Cerah untuk Akses/Highlight */
    --text-color: #333333;
    --bg-light: #f8f9fa;
    --white: #ffffff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

body {
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center { text-align: center; }
.bg-light { background-color: var(--bg-light); }
.section { padding: 80px 0; }

.section-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: bold;
}

.section-subtitle {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Header Dan Navigasi */
.header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo span { color: var(--accent-color); }

.nav-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    font-size: 14px;
    transition: color 0.2s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* Tombol-tombol */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white) !important;
}

.btn-primary:hover { 
    background: var(--primary-dark); 
}

.btn-secondary {
    background: #e2e8f0;
    color: var(--primary-color);
}

.btn-secondary:hover {
    background: #cbd5e1;
}

.btn-large {
    padding: 14px 32px;
    font-size: 1.1rem;
}

/* Section Hero dengan Siluet Gambar /bksup/1225-4.jpg */
.hero {
    position: relative;
    background: linear-gradient(
        135deg, 
        rgba(139, 0, 0, 0.82) 0%,
        rgba(92, 0, 0, 0.86) 100%
    ), url('/bksup/1225-4.jpg') center/cover no-repeat;
    color: var(--white);
    padding: 110px 0;
    text-align: center;
    background-attachment: fixed; /* Memberikan efek parallax halus saat di-scroll */
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4); /* Efek bayangan agar teks semakin tajam */
}

.hero p {
    font-size: 1.15rem;
    max-width: 750px;
    margin: 0 auto 30px;
    opacity: 0.95;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.hero .btn-primary {
    background: var(--white);
    color: var(--primary-color) !important;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.hero .btn-primary:hover {
    background: #f8fafc;
    transform: translateY(-2px);
}

.hero .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px); /* Efek kaca transparan modern */
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Grid Dan Kartu Layanan */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(139, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 30px 0;
    font-size: 0.9rem;
    border-top: 3px solid var(--accent-color);
}

/* Gaya Responsif Mobile */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }
    .nav-menu.active { display: flex; }
    .hero h1 { font-size: 1.8rem; }
}

/* Style Kartu Anak Usaha / Ekosistem */
.subsidiary-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.preview-frame {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: #e2e8f0;
    position: relative;
}

.subsidiary-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    transition: transform 0.3s ease;
}

.subsidiary-card:hover .subsidiary-img {
    transform: scale(1.05);
}

.subsidiary-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-grow: 1;
}

.subsidiary-content h3 {
    color: var(--primary-color);
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.subsidiary-content p {
    font-size: 0.9rem;
    color: #475569;
    margin-bottom: 15px;
    line-height: 1.5;
}

/* Style Kartu Ulasan Google */
.review-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-top: 3px solid #8b0000;
    border-radius: 8px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 2px 5px rgba(0,0,0,0.03);
}

.review-stars {
    color: #f59e0b;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.review-text {
    font-size: 0.9rem;
    color: #334155;
    font-style: italic;
    margin-bottom: 15px;
    line-height: 1.5;
}

.review-author strong {
    display: block;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.review-author span {
    font-size: 0.8rem;
    color: #64748b;
}