/* Import Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700;800&display=swap');

/* Variabel Warna */
:root {
    --primary-color: #007BFF; /* Biru Primer - Cerah dan Energi */
    --secondary-color: #0056b3; /* Biru Sekunder/Hover - Lebih Gelap */
    --light-color: #FFFFFF; /* Putih */
    --background-light: #F8F9FA; /* Abu-abu terang untuk bagian */
    --text-color: #343a40; /* Hitam keabuan untuk teks */
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 12px; /* Gaya modern 2025: sudut membulat ('squircle' vibe) */
}

/* Reset dan Tipografi Dasar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth; /* Untuk navigasi yang mulus */
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--light-color);
}

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

a {
    text-decoration: none;
    color: var(--primary-color);
}

section {
    padding: 80px 0;
}

/* --- Heading dan Judul --- */
.section-title {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: var(--secondary-color);
    font-weight: 700;
}

/* --- Header/Navbar --- */
header {
    background-color: var(--light-color);
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Base style untuk link logo */
.logo {
    font-size: 1.8em; 
    font-weight: 700;
    color: var(--text-color); 
    line-height: 1;
    transition: opacity 0.3s;
}

.logo:hover {
    opacity: 0.8;
}

/* Style spesifik untuk "otoBillnet" */
.logo-oto {
    color: var(--text-color);
    font-weight: 400; 
}

.logo-bill {
    color: var(--primary-color); 
    font-weight: 800; 
    text-transform: capitalize; 
}

.logo-net {
    color: var(--secondary-color); 
    font-weight: 600;
}


nav a {
    margin-left: 25px;
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--secondary-color);
}

.cta-nav {
    background-color: var(--primary-color);
    color: var(--light-color) !important;
    padding: 8px 15px;
    border-radius: var(--border-radius);
    margin-left: 30px;
    transition: background-color 0.3s;
}

.cta-nav:hover {
    background-color: var(--secondary-color);
}

/* --- Hero Banner --- */
.hero-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e90ff 100%); 
    color: var(--light-color);
    padding: 100px 0;
    min-height: 70vh; /* Agar terlihat lebih lega */
    display: flex;
    align-items: center;
}

.hero-banner .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.main-heading {
    font-size: 3.8em;
    margin-bottom: 10px;
    line-height: 1.1;
}

.tagline {
    font-size: 1.5em;
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-image {
    flex: 1;
    text-align: center;
}
/* Anda dapat memasukkan gaya untuk ilustrasi di sini jika diperlukan */

.cta-button {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px; 
    font-weight: 700;
    font-size: 1.1em;
    transition: transform 0.3s, box-shadow 0.3s;
}

.primary-cta {
    background-color: var(--light-color);
    color: var(--primary-color);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.primary-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* --- Fitur Unggulan --- */
.fitur-unggulan {
    background-color: var(--background-light);
}

.fitur-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.fitur-item {
    background-color: var(--light-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
    height: 100%; /* Pastikan semua kartu memiliki tinggi yang sama */
}

.fitur-item:hover {
    transform: translateY(-10px);
}

/* STYLE UNTUK IKON FONT AWESOME */
.fitur-item i {
    font-size: 3em; 
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.fitur-item h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.25em;
    font-weight: 600;
}

/* --- Unlimited Section --- */
.unlimited-section {
    background-color: var(--primary-color);
    color: var(--light-color);
    text-align: center;
    padding: 50px 0;
}

.unlimited-section .section-title {
    color: var(--light-color);
    margin-bottom: 15px;
}

.unlimited-text {
    font-size: 1.3em;
    font-weight: 300;
}

/* --- Kenapa Memilih Kami --- */
.keunggulan-kami {
    background-color: var(--light-color);
}

.keunggulan-list {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    text-align: center;
}

.keunggulan-item {
    flex: 1;
    padding: 30px;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1.2em;
    font-weight: 600;
    color: var(--primary-color);
    transition: background-color 0.3s, color 0.3s, transform 0.3s;
}

.keunggulan-item:hover {
    background-color: var(--primary-color);
    color: var(--light-color);
    transform: scale(1.05);
}

/* STYLE UNTUK IKON DI KEUNGGULAN */
.keunggulan-item i {
    font-size: 1.5em;
    margin-right: 10px;
}
.keunggulan-item:hover i {
    color: var(--light-color);
}
.keunggulan-item h3 {
    display: inline;
}

/* --- Harga Section --- */
.harga-section {
    background-color: var(--background-light);
    text-align: center;
}

.pricing-card {
    background-color: var(--light-color);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: inline-block;
    max-width: 400px;
    margin-top: 30px;
    border-top: 5px solid var(--primary-color);
}

.price-label {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.price-value {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.pricing-card ul {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
    padding-left: 0;
}

.pricing-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

.secondary-cta {
    background-color: #28a745; /* Hijau WhatsApp */
    color: var(--light-color) !important;
    box-shadow: 0 6px 15px rgba(40, 167, 69, 0.3);
}

.secondary-cta:hover {
    background-color: #1e7e34;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(40, 167, 69, 0.4);
}

/* --- Footer --- */
footer {
    background-color: var(--secondary-color);
    color: var(--light-color);
    text-align: center;
    padding: 20px 0;
    font-size: 0.9em;
}

/* --- Floating WhatsApp Icon --- */
.floating-whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: #28a745;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    z-index: 1000;
    transition: transform 0.3s;
}

.floating-whatsapp:hover {
    transform: scale(1.1);
}

/* STYLE UNTUK IKON WHATSAPP FONT AWESOME */
.floating-whatsapp i {
    font-size: 30px;
    color: var(--light-color);
}


/* --- Responsif (Mobile-First) --- */
@media (max-width: 992px) {
    .main-heading {
        font-size: 3em;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2em;
    }
    
    .hero-banner {
        padding: 80px 0;
    }
    
    .hero-banner .container {
        flex-direction: column;
        text-align: center;
    }
    
    .main-heading {
        font-size: 2.2em;
    }

    .tagline {
        font-size: 1.1em;
    }
    
    .hero-image {
        margin-top: 30px;
        /* Hapus atau kecilkan gambar/ilustrasi di mobile untuk kecepatan */
    }

    header nav {
        display: none; /* Sembunyikan navigasi utama di mobile */
    }

    header .container {
        justify-content: center;
    }

    .keunggulan-list {
        flex-direction: column;
    }
    
    .keunggulan-item {
        margin-bottom: 15px;
    }
}