/* --- Global & Variable Setup --- */
:root {
    --primary-color: #008080; /* Hijau Toska Adzkia */
    --secondary-color: #006666; 
    --accent-color: #f37736;   /* Oranye (Mirip referensi untuk tombol) */
    --dark-color: #333333;   
    --light-color: #f8f9fa; 
    --white-color: #ffffff;
    --gradient-bg: linear-gradient(135deg, #008080 0%, #004d4d 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Poppins', sans-serif; line-height: 1.6; color: var(--dark-color); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* --- Utility & Tombol --- */
.btn { 
    display: inline-block; 
    background-color: var(--accent-color); 
    color: var(--white-color); 
    padding: 12px 30px; 
    border-radius: 50px; /* Lebih bulat seperti referensi */
    text-decoration: none; 
    font-weight: 700; 
    transition: all 0.3s ease; 
    border: none;
    box-shadow: 0 4px 15px rgba(243, 119, 54, 0.4);
}
.btn:hover { 
    background-color: #d96223; 
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(243, 119, 54, 0.6);
}

.btn-outline { 
    display: inline-block; 
    background-color: transparent; 
    color: var(--primary-color); 
    padding: 10px 25px; 
    border: 2px solid var(--primary-color); 
    border-radius: 50px; 
    text-decoration: none; 
    font-weight: 600; 
    transition: all 0.3s ease; 
}
.btn-outline:hover { background-color: var(--primary-color); color: var(--white-color); }

.content-section { padding: 80px 0; }
.content-section h2 { text-align: center; font-size: 2.5rem; margin-bottom: 50px; color: var(--primary-color); font-weight: 700; }

/* --- Header & Navigasi --- */
#header { background-color: var(--white-color); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
#header nav { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo { font-size: 1.8rem; font-weight: 800; color: var(--primary-color); text-decoration: none; letter-spacing: -1px; }
.nav-links { display: flex; list-style: none; }
.nav-links li { margin-left: 30px; }
.nav-links a { text-decoration: none; color: var(--dark-color); font-weight: 500; transition: color 0.3s ease; }
.nav-links a:hover { color: var(--accent-color); }

/* --- HERO SECTION (PENGGANTI SLIDER) --- */
/* Style ini meniru layout referensi (Teks Besar + Tombol) */
.hero-section {
    position: relative;
    width: 100%;
    height: 90vh; /* Tinggi layar penuh */
    min-height: 600px;
    background-image: url('https://images.pexels.com/photos/2908984/pexels-photo-2908984.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* Efek parallax */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white-color);
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(rgba(0, 128, 128, 0.85), rgba(0, 51, 51, 0.9)); /* Overlay Hijau Toska Gelap */
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 20px;
    animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.8;
}

.btn-hero {
    font-size: 1.2rem;
    padding: 15px 40px;
    background-color: #25D366; /* Warna WA */
}
.btn-hero:hover { background-color: #128C7E; box-shadow: 0 0 20px rgba(37, 211, 102, 0.5); }

/* Animasi Masuk */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- About & Books --- */
/* (Sama seperti sebelumnya, sedikit perbaikan) */
#about { background-color: var(--light-color); }
.about-content { display: flex; align-items: center; gap: 50px; }
.about-image img { width: 100%; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.book-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 30px; }
.book-card { background: var(--white-color); border-radius: 15px; box-shadow: 0 5px 20px rgba(0,0,0,0.05); padding: 20px; text-align: center; transition: 0.3s; }
.book-card:hover { transform: translateY(-10px); }
.book-card img { width: 100%; border-radius: 5px; margin-bottom: 15px; }

/* --- Pricing Section Update --- */
.pricing-grid {
    display: grid;
    /* Grid otomatis menyesuaikan lebar layar */
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 25px;
    justify-content: center; /* Agar kartu berada di tengah jika baris tidak penuh */
}

.pricing-card {
    background: var(--white-color);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 30px 20px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    border: 1px solid #eee;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

/* Style khusus untuk Paket Populer (Paket 4) */
.pricing-card.popular {
    border: 2px solid var(--accent-color);
    background: #fffbf9; /* Sedikit warna latar hangat */
    transform: scale(1.05);
    z-index: 2;
    box-shadow: 0 8px 30px rgba(243, 119, 54, 0.2);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-5px);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: var(--white-color);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(243, 119, 54, 0.4);
}

.pricing-header {
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}

.pricing-header h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.sub-text {
    font-size: 0.9rem;
    color: #777;
    display: block;
    margin-top: 5px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
    flex-grow: 1; /* Agar tombol selalu sejajar di bawah */
    padding: 0 10px;
}

.pricing-features li {
    margin-bottom: 12px;
    color: #555;
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
}

.pricing-features i {
    margin-right: 10px;
    margin-top: 4px;
    min-width: 20px;
}

.pricing-features i.fa-check { color: var(--secondary-color); }
.pricing-features i.fa-times { color: #ccc; }
.pricing-features li.disabled { color: #aaa; text-decoration: line-through; }

/* --- CONTACT SECTION (BARU) --- */
#contact { background-color: #fff; }
.contact-wrapper { display: flex; flex-wrap: wrap; gap: 40px; }
.contact-info { flex: 1; min-width: 300px; }
.map-container { flex: 1; min-width: 300px; border-radius: 15px; overflow: hidden; box-shadow: 0 5px 15px rgba(0,0,0,0.1); }

.contact-item { display: flex; align-items: flex-start; margin-bottom: 25px; }
.contact-item i { font-size: 1.5rem; color: var(--accent-color); margin-right: 20px; margin-top: 5px; width: 30px; text-align: center; }
.contact-item strong { color: var(--primary-color); display: block; margin-bottom: 5px; }
.contact-item a { color: var(--dark-color); text-decoration: none; transition: 0.3s; }
.contact-item a:hover { color: var(--accent-color); }
.address { font-size: 1.1rem; line-height: 1.8; margin-bottom: 30px; color: #555; padding-left: 50px; position: relative; }
.address .fa-map-marker-alt { position: absolute; left: 0; top: 5px; color: var(--accent-color); font-size: 1.5rem; }

/* --- Footer --- */
#footer { background-color: #222; color: #fff; text-align: center; padding: 40px 0; }
.social-links a { color: #fff; font-size: 1.5rem; margin: 0 15px; transition: 0.3s; }
.social-links a:hover { color: var(--accent-color); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links { display: none; } /* Perlu JS untuk mobile menu */
    .hero-content h1 { font-size: 2rem; }
    .contact-wrapper { flex-direction: column; }
    .pricing-card.popular { transform: scale(1); }
}