/* =========================================
   1. PENGATURAN DASAR & VARIABEL WARNA
   ========================================= */
:root {
    --primary-color: #2563eb; /* Biru modern */
    --primary-hover: #1d4ed8;
    --dark-color: #1f2937;
    --light-bg: #f3f4f6;
    --white: #ffffff;
    --danger: #ef4444;
    --border-color: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light-bg);
    color: var(--dark-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* Agar footer selalu di bawah */
}

main {
    flex: 1; /* Memastikan main area mengisi ruang kosong agar footer di bawah */
    padding-bottom: 40px;
}

/* =========================================
   2. NAVBAR (MENU NAVIGASI)
   ========================================= */
header {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 24px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
}

/* =========================================
   3. HALAMAN UTAMA (INDEX.HTML)
   ========================================= */
.hero {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 60px 20px;
    margin-bottom: 40px;
}

.products-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.products-section h3 {
    margin-bottom: 20px;
    font-size: 22px;
}

/* Menggunakan CSS Grid untuk deretan produk */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.product-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    padding: 15px;
    text-align: center;
}

.product-card:hover {
    transform: translateY(-5px); /* Efek melayang saat di-hover */
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover; /* Agar gambar tidak gepeng */
    border-radius: 6px;
    margin-bottom: 15px;
    background-color: #e2e8f0; /* Warna placeholder jika gambar belum ada */
}

.product-price {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 18px;
    margin: 10px 0;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn-tambah {
    width: 100%;
    padding: 10px;
    background-color: var(--primary-color);
    color: var(--white);
}

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

/* =========================================
   4. HALAMAN LOGIN & REGISTER (AUTH)
   ========================================= */
.auth-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px); /* Memotong tinggi navbar & footer */
}

.auth-container {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-color);
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: var(--white);
    margin-top: 10px;
}

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

.auth-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
}

/* =========================================
   5. HALAMAN KERANJANG (CART)
   ========================================= */
.cart-section {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.cart-layout {
    display: flex;
    gap: 30px;
    margin-top: 20px;
    align-items: flex-start; /* Agar ringkasan tidak memanjang ke bawah */
}

.cart-items-container {
    flex: 2; /* Mengambil ruang lebih besar (kiri) */
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.cart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-summary {
    flex: 1; /* Mengambil ruang lebih kecil (kanan) */
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: sticky;
    top: 80px; /* Menempel saat di-scroll */
}

.summary-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    font-size: 18px;
}

.btn-checkout {
    width: 100%;
    padding: 15px;
    background-color: #10b981; /* Warna hijau untuk checkout */
    color: var(--white);
    font-size: 16px;
}

.btn-checkout:hover {
    background-color: #059669;
}

.btn-hapus {
    background-color: var(--danger);
    color: var(--white);
    padding: 5px 15px;
}

/* =========================================
   6. FOOTER & RESPONSIVE DESIGN
   ========================================= */
footer {
    background-color: var(--dark-color);
    color: var(--white);
    text-align: center;
    padding: 20px;
    margin-top: auto;
}

/* Tampilan untuk layar HP (Mobile) */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .cart-layout {
        flex-direction: column; /* Mengubah layout keranjang menjadi atas-bawah */
    }
    
    .cart-summary {
        width: 100%;
        position: static;
    }
}