/* --- BIẾN VÀ THIẾT LẬP CHUNG --- */
:root {
    --black: #000000;
    --white: #ffffff;
    --gray: #767677;
    --light-gray: #eceff1;
    --accent: #3b82f6;
}

* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
}

body { 
    background-color: var(--white); 
    color: var(--black);
    overflow-x: hidden;
}

/* --- NAVBAR --- */
.navbar {
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    padding: 15px 5%; 
    background: #fff;
    position: sticky; 
    top: 0; 
    z-index: 1000;
    border-bottom: 1px solid #eee;
}

.logo { font-size: 1.8rem; font-weight: 700; letter-spacing: 1px; }

.nav-links { list-style: none; display: flex; gap: 25px; }

.nav-links a { 
    text-decoration: none; 
    color: var(--black); 
    font-weight: 500; 
    font-size: 14px; 
    transition: 0.2s;
    padding-bottom: 5px;
}

.nav-links a:hover, .nav-links a.active { 
    border-bottom: 2px solid #000;
}

.header-right { display: flex; align-items: center; gap: 1.2rem; }

.search-bar input { 
    background: #f3f4f6;
    border: none;
    padding: 8px 15px;
    outline: none;
    width: 180px;
}

.cart-icon { position: relative; font-size: 1.5rem; cursor: pointer; }

#cart-count { 
    position: absolute; 
    top: -5px; 
    right: -10px; 
    background: var(--black);
    color: white; 
    font-size: 10px; 
    padding: 2px 6px; 
    border-radius: 50%;
}

/* --- HERO SECTION --- */
.hero-section {
    height: 70vh;
    background: linear-gradient(to right, rgba(0,0,0,0.6), transparent), 
                url('https://images.unsplash.com/photo-1552346154-21d32810aba3?q=80&w=2070') center/cover;
    display: flex; 
    align-items: center; 
    padding: 0 8%;
}

.hero-content h1 {
    font-size: 4.5rem; 
    color: #fff; 
    line-height: 1; 
    margin-bottom: 20px;
}

/* --- CATEGORIES --- */
.categories {
    display: flex; 
    height: 350px; 
    gap: 10px; 
    padding: 20px 5%;
}

.cat-item { flex: 1; position: relative; overflow: hidden; cursor: pointer; }

.cat-item img { width: 100%; height: 100%; object-fit: cover; transition: 0.5s; }

.cat-item:hover img { transform: scale(1.05); }

.cat-label {
    position: absolute; 
    bottom: 20px; 
    left: 20px;
    background: #fff; 
    padding: 8px 20px; 
    font-weight: 700;
}

/* --- PRODUCT GRID --- */
.product-section { padding: 40px 5%; }

.product-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); 
    gap: 20px;
    transition: opacity 0.3s ease;
}

.product-card { background: var(--white); transition: 0.3s; }

.product-img { background: #f5f5f5; position: relative; overflow: hidden; }

.product-img img { width: 100%; display: block; }

.quick-add {
    position: absolute; 
    bottom: 0; width: 100%; 
    background: #000; color: #fff;
    border: none; padding: 12px; 
    font-weight: 700; 
    transform: translateY(100%);
    transition: 0.3s;
    cursor: pointer;
}

.product-card:hover .quick-add { transform: translateY(0); }

.product-info { padding: 15px 0; }
.product-info h3 { font-size: 15px; margin-bottom: 5px; }
.price { font-weight: 700; }

/* --- BRAND INTRO --- */
.brand-intro-section {
    background-color: #000;
    color: #fff;
    padding: 80px 20px;
    text-align: center;
}

.intro-box { max-width: 800px; margin: 0 auto; }

.intro-heading { font-size: 2rem; margin-bottom: 20px; }

.intro-text p {
    font-size: 1rem;
    line-height: 1.6;
    color: #ccc;
    text-transform: none;
    margin-bottom: 15px;
}

/* --- HỆ THỐNG MODAL (QUAN TRỌNG ĐỂ HIỆN BILL) --- */
.overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1500;
    display: none;
}

.overlay.active { display: block; }

/* Modal chung cho Thanh toán, Lịch sử, Hóa đơn */
.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: #fff;
    z-index: 2000;
    width: 90%;
    max-width: 450px;
    padding: 30px;
    visibility: hidden;
    opacity: 0;
    transition: all 0.3s ease;
}

.modal.active {
    visibility: visible;
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.modal-content h3 { margin-bottom: 20px; border-bottom: 2px solid #000; padding-bottom: 10px; }

input, textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    outline: none;
    text-transform: none; /* Khách nhập tên thì để chữ thường */
}

/* --- GIỎ HÀNG SIDEBAR --- */
.cart-sidebar {
    position: fixed;
    top: 0; right: -420px;
    width: 400px; height: 100%;
    background: #fff;
    z-index: 1600;
    transition: 0.4s ease;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.cart-sidebar.active { right: 0; }

.cart-content { flex: 1; overflow-y: auto; }

.total { margin-top: auto; padding-top: 20px; border-top: 1px solid #eee; }

/* --- NÚT BẤM --- */
.btn-primary, .checkout-btn, .btn-confirm {
    background: #000;
    color: #fff;
    border: none;
    padding: 15px;
    width: 100%;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

.btn-primary:hover { background: #333; }

.view-history-btn {
    position: fixed;
    bottom: 20px; left: 20px;
    background: #000; color: #fff;
    padding: 12px 20px;
    border: none; border-radius: 50px;
    cursor: pointer; z-index: 1000;
    display: flex; align-items: center; gap: 10px;
}

/* --- GIAO DIỆN BILL (HÓA ĐƠN) --- */
#invoiceDetails {
    text-transform: none; /* Để thông tin khách hàng dễ đọc */
}/* Thiết kế Hóa đơn Huy Store */
.bill-container {
    background: #fff;
    padding: 20px;
    font-family: 'Courier New', Courier, monospace; /* Font chữ máy in hóa đơn */
    color: #000;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 350px;
    margin: 0 auto;
}

.bill-header {
    text-align: center;
    border-bottom: 1px dashed #000;
    padding-bottom: 10px;
    margin-bottom: 10px;
}

.bill-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 14px;
}

.bill-footer {
    border-top: 1px dashed #000;
    margin-top: 10px;
    padding-top: 10px;
    text-align: center;
}

.total-bill {
    font-size: 18px;
    font-weight: bold;
    color: #e44d26;
}/* Style cho nút Quản trị doanh thu */
.admin-fixed-btn {
    position: fixed;
    bottom: 85px; /* Nằm trên nút Lịch sử đơn hàng một chút */
    left: 20px;
    background: #000; /* Màu đen sang trọng */
    color: #fff;
    padding: 10px 18px;
    border-radius: 50px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Oswald', sans-serif;
    font-size: 13px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    z-index: 1000;
    transition: 0.3s;
    border: 2px solid #fff;
}

.admin-fixed-btn:hover {
    background: #e44d26; /* Đổi màu cam khi rê chuột vào */
    transform: scale(1.05);
    color: #fff;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    border-bottom: 1px solid #eee;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: black;
    font-weight: bold;
    font-size: 14px;
}

.icons i {
    margin-left: 20px;
    cursor: pointer;
}

/* Hero Banner */
.hero {
    height: 60vh;
    background: url('https://brand.assets.adidas.com/image/upload/f_auto,q_auto,fl_lossy/if_w_gt_1920,w_1920/enVN/Images/ss24-samba-gazelle-spezial-global-launch-hp-mh-large-d_tcm212-1135255.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    padding-left: 5%;
    color: white;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.btn-shop {
    padding: 12px 25px;
    background: white;
    border: none;
    font-weight: bold;
    margin-top: 20px;
    cursor: pointer;
}

/* Grid Sản phẩm */
.products {
    padding: 50px 5%;
}

.products h2 {
    margin-bottom: 30px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    border: 1px solid transparent;
    transition: 0.3s;
    cursor: pointer;
}

.card:hover {
    border: 1px solid #ddd;
}

.card img {
    width: 100%;
}

.card-info {
    padding: 15px;
}

.price {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}
/* ===============================
   ĐỊA CHỈ CỬA HÀNG
================================ */

.store-address-section {
    background: #000;
    padding: 80px 20px;
    color: #fff;
}

.store-address-box {
    max-width: 1200px;
    margin: auto;
}

.store-address-title {
    text-align: center;
    font-size: 28px;
    letter-spacing: 3px;
    margin-bottom: 50px;
}

.store-address-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.store-info h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.store-info p {
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 20px;
}

.store-tags span {
    display: inline-block;
    border: 1px solid #fff;
    padding: 6px 14px;
    margin-right: 10px;
    font-size: 12px;
    letter-spacing: 1px;
}

/* ✅ MAP CÓ MÀU – HIỆN VỊ TRÍ */
.store-map iframe {
    width: 100%;
    height: 280px;
    border: none;
    filter: none !important; /* QUAN TRỌNG */
    border-radius: 6px;
}

/* MOBILE */
@media (max-width: 768px) {
    .store-address-content {
        grid-template-columns: 1fr;
    }

    .store-map iframe {
        height: 250px;
    }
}
/* ===== BRAND SHOWCASE ===== */
.brand-showcase {
    padding: 90px 80px;
    background: #f9f9f9;
}

.brand-header {
    text-align: center;
    margin-bottom: 60px;
}

.brand-header h2 {
    font-size: 30px;
    letter-spacing: 3px;
    margin-bottom: 15px;
}

.brand-header p {
    font-size: 16px;
    color: #666;
}

/* SECTION */
.brand-section {
    padding: 60px 8%;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 50px;
}

/* WRAPPER */
.brand-wrapper {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 40px;
    min-height: 520px;
}

/* WRAPPER */
.brand-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: stretch;
}

.buy-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    background: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 20px;
    font-weight: bold;
}

.buy-btn:hover {
    background: #333;
}