/* --- PENGATURAN DASAR --- */
:root {
    --bg-color: #121212; /* Warna latar belakang gelap elegan */
    --text-main: #ffffff; /* Teks putih bersih */
    --text-muted: #888888; /* Teks abu-abu untuk copyright */
}

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

/* Ganti bagian body yang lama dengan ini */
body {
    background-color: #0a0a0a; /* Hitam pekat */
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
    z-index: 1;
    
    /* Pola kotak-kotak (grid) sangat tipis */
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Tambahan efek cahaya pendar (glow) elegan di belakang teks */
body::before {
    content: "";
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 80vw;
    max-width: 800px;
    max-height: 800px;
    /* Cahaya putih transparan yang memudar di ujungnya */
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
    z-index: -1;
    pointer-events: none; /* Agar cahaya tidak menutupi tombol saat diklik */
}

/* --- NAVBAR (Logo) --- */
.navbar {
    padding: 40px 60px;
    display: flex;
    justify-content: flex-start; /* Sketsa Desktop: Logo di kiri */
}

.logo {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* --- BAGIAN TENGAH (Hero) --- */
.hero {
    flex-grow: 1; /* Mendorong konten ke tengah secara vertikal */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 20px;
}

.headline {
    font-size: 4.5rem; /* Ukuran besar untuk desktop */
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 50px;
    letter-spacing: -1px;
}

/* --- TOMBOL --- */
.button-group {
    display: flex;
    gap: 20px; /* Sketsa Desktop: Berjajar ke samping */
}

.btn {
    padding: 15px 45px;
    border-radius: 50px; /* Bentuk tombol kapsul elegan */
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease; /* Animasi mulus */
}

.btn-primary {
    background-color: var(--text-main);
    color: var(--bg-color);
}

.btn-primary:hover {
    transform: translateY(-5px); /* Efek terangkat saat disentuh */
    box-shadow: 0 10px 20px rgba(255,255,255,0.2);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--text-main);
}

.btn-outline:hover {
    background-color: var(--text-main);
    color: var(--bg-color);
    transform: translateY(-5px);
}

/* --- COPYRIGHT --- */
.footer {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
    font-size: 14px;
}

/* ========================================= */
/* --- MODE MOBILE (HP) SESUAI SKETSA    --- */
/* ========================================= */
@media (max-width: 768px) {
    .navbar {
        justify-content: center; /* Sketsa Mobile: Logo pindah ke tengah */
        padding: 30px 20px;
    }

    .headline {
        font-size: 2.8rem; /* Teks mengecil menyesuaikan layar HP */
        margin-bottom: 40px;
    }

    .button-group {
        flex-direction: column; /* Sketsa Mobile: Tombol bersusun atas-bawah */
        width: 100%;
        max-width: 320px;
        gap: 15px;
    }

    .btn {
        width: 100%; /* Tombol memanjang penuh di HP */
    }
}

/* ========================================= */
/* --- PENGATURAN POP-UP PROMO --- */
/* ========================================= */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8); /* Latar belakang gelap transparan */
    z-index: 9999; /* Memastikan pop-up selalu di paling atas */
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease-in-out;
    padding: 20px;
}

/* Class 'show' akan ditambahkan oleh JavaScript */
.popup-overlay.show {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background-color: #1e1e1e; /* Warna abu-abu sangat gelap agar kontras */
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    width: 100%;
    position: relative;
    border: 1px solid #333;
    transform: translateY(30px); /* Posisi awal sedikit ke bawah */
    transition: all 0.4s ease-in-out;
}

.popup-overlay.show .popup-content {
    transform: translateY(0); /* Bergerak ke tengah saat muncul */
}

.close-popup {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    color: var(--text-muted);
    cursor: pointer;
    transition: 0.2s;
}

.close-popup:hover {
    color: var(--text-main);
}

.popup-icon {
    font-size: 40px;
    margin-bottom: 10px;
}

.popup-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 5px;
}

.popup-content p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

.popup-price {
    font-size: 26px;
    font-weight: 600;
    color: #ffffff; /* Bisa diganti warna emas (gold) kalau Anda suka */
    margin-bottom: 25px;
    border: 2px dashed #555;
    padding: 10px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-popup {
    width: 100%;
    display: inline-block; /* Memastikan tombol merentang penuh di dalam popup */
}