:root {
    --primary-color: #000000;
    --accent-color: #ef4444; /* Vibe sale / highlight */
    --text-main: #333333;
    --text-muted: #666666;
    --bg-light: #f9f9f9;
    --bg-white: #ffffff;
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --border-rad: 0px; /* Bỏ bo cong để chuyên nghiệp hơn */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-stack);
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: var(--primary-color);
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    margin: 0 15px;
    font-weight: 600;
    transition: 0.3s;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.btn-nav {
    background-color: var(--primary-color);
    color: var(--bg-white);
    padding: 10px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: 0.3s;
}

.btn-nav:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    position: relative;
    height: 90vh;
    background-image: url('https://down-vn.img.susercontent.com/file/vn-11134207-81ztc-mm1724qnjuh090');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 60px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0.7));
}

.hero-content {
    position: relative;
    z-index: 2;
    color: white;
    max-width: 800px;
    padding: 20px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: 2px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary {
    background-color: var(--bg-white);
    color: var(--primary-color);
    padding: 16px 36px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1rem;
    transition: 0.3s;
}

.btn-primary:hover {
    background-color: var(--accent-color);
    color: white;
    transform: scale(1.05);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    color: white;
    padding: 14px 36px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1rem;
    transition: 0.3s;
}

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

/* USP Section */
.usp-section {
    background: var(--bg-white);
    padding: 60px 0;
    border-bottom: 1px solid #eaeaea;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    text-align: center;
}

.usp-item {
    padding: 20px;
}

.usp-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 15px;
}

.usp-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.usp-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Minimalist Products Section */
.products { padding: 80px 0; background: #fff; }
.section-title { text-align: center; font-size: 1.8rem; font-weight: 700; margin-bottom: 40px; letter-spacing: 2px; color: #000; text-transform: uppercase; }

.grid-products {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
@media (max-width: 900px) { .grid-products { grid-template-columns: repeat(2, 1fr); gap: 15px; } }

.lv-product-card {
    background: #fff;
    cursor: pointer;
    transition: 0.3s;
}
.lv-product-img-box {
    position: relative;
    width: 100%;
    aspect-ratio: 4/5; /* Tỉ lệ dọc Editorial */
    overflow: hidden;
    background: #f5f5f5;
    margin-bottom: 15px;
}
.lv-img-primary, .lv-img-secondary {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    transition: opacity 0.4s ease;
}
.lv-img-secondary {
    opacity: 0;
}
.lv-product-card:hover .lv-img-secondary {
    opacity: 1; /* Hover Swap Image */
}
.lv-badge {
    position: absolute;
    top: 10px; left: 10px;
    background: #0044FF; /* Accent branding màu xanh */
    color: white;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.lv-product-info {
    text-align: left;
}
.lv-product-name {
    font-size: 0.95rem;
    font-weight: 400;
    color: #000;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.lv-price-row {
    display: flex;
    align-items: baseline;
    gap: 10px;
}
.lv-new-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: #000;
}
.lv-old-price {
    text-decoration: line-through;
    color: #999;
    font-size: 0.85rem;
}

/* Order Section */
.order-section {
    padding: 80px 0;
    background: #111;
    color: white;
}

.order-box {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255,255,255,0.05);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.1);
}

.order-box h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 15px;
}

.order-box p {
    text-align: center;
    color: #ccc;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.row-fields {
    display: flex;
    gap: 15px;
}

input, select, textarea {
    width: 100%;
    padding: 16px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(0,0,0,0.5);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: 0.3s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--accent-color);
    background: rgba(0,0,0,0.8);
}

.btn-submit {
    width: 100%;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 18px;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn-submit:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.assurance {
    display: block;
    margin-top: 20px;
    font-size: 0.85rem !important;
    color: #888 !important;
}

/* Footer */
.footer {
    background: white;
    padding: 60px 0 30px;
    border-top: 1px solid #eaeaea;
}

.footer-flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
}

.f-brand h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.f-contact h4, .f-social h4 {
    margin-bottom: 15px;
}

.f-contact p {
    margin-bottom: 10px;
}

.f-social a {
    display: block;
    color: var(--text-main);
    text-decoration: none;
    margin-bottom: 10px;
    transition: 0.3s;
}

.f-social a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 40px;
    border-top: 1px solid #eaeaea;
    color: var(--text-muted);
}

/* Floating Actions */
.floating-buttons {
    position: fixed;
    right: 20px;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: 0.3s;
    font-size: 1.5rem;
}

.float-btn:hover {
    transform: scale(1.1);
}

.zalo-btn { background: #0068ff; }
.mess-btn { background: #0084ff; }
.phone-btn { 
    background: #10b981; 
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Loader */
.loader {
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Category Filters */
.category-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}
.filter-btn {
    padding: 10px 24px;
    border: 2px solid #eaeaea;
    background: transparent;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    font-family: var(--font-stack);
    transition: 0.3s;
}
.filter-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}
.filter-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

/* Minimalist Navbar & Topbar (Levents Style) */
.lv-topbar {
    background: #000;
    color: #fff;
    text-align: center;
    padding: 8px 0;
    font-size: 0.75rem;
    letter-spacing: 1px;
    font-weight: 500;
    text-transform: uppercase;
}
.lv-navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    border-bottom: 1px solid #eaeaea;
}
.lv-nav-left, .lv-nav-right {
    flex: 1;
    display: flex;
    align-items: center;
}
.lv-nav-right {
    justify-content: flex-end;
    gap: 20px;
}
.lv-logo {
    flex: 1;
    text-align: center;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 3px;
    text-decoration: none;
    color: #0044FF; /* Accent Brand Name */
}
.lv-icon { cursor: pointer; color: #000; transition: color 0.3s; }
.lv-icon:hover { color: #0044FF; }
@media (max-width: 768px) { .lv-navbar { padding: 15px 20px; } .lv-logo { font-size: 1.2rem; } }

/* Minimalist Hero Banner */
.lv-hero {
    height: 80vh;
    background-image: url('https://down-vn.img.susercontent.com/file/vn-11134207-81ztc-mm1724qnjuh090');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}
.lv-hero::after {
    content: ''; position: absolute; top:0; left:0; width:100%; height:100%; background: rgba(0,0,0,0.2);
}
.lv-hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
}
.lv-subtext {
    font-size: 1rem;
    letter-spacing: 4px;
    margin-bottom: 15px;
    font-weight: 400;
}
.lv-headline {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 30px;
}
.lv-btn {
    display: inline-block;
    padding: 14px 40px;
    background: #fff;
    color: #000;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: 0.3s;
}
.lv-btn:hover { background: #0044FF; color: #fff; border: 1px solid #0044FF;}

/* Pro Footer */
.pro-footer {
    background: #000; color: #fff; padding: 80px 0 20px 0; font-family: Helvetica, Arial, sans-serif;
}
.pro-footer-top { margin-bottom: 60px; border-bottom: 1px solid #222; padding-bottom: 40px; }
.newsletter-chic { max-width: 600px; margin: 0 auto; text-align: center; }
.newsletter-chic h3 { font-size: 1.8rem; margin-bottom: 15px; letter-spacing: 2px; }
.newsletter-chic p { color: #888; margin-bottom: 25px; font-size: 0.95rem; }
.newsletter-chic form { display: flex; border-bottom: 1px solid #fff; padding-bottom: 5px; }
.newsletter-chic input { flex: 1; background: transparent; border: none; color: #fff; font-size: 1rem; outline: none; padding: 10px 0; }
.newsletter-chic button { background: transparent; color: #fff; border: none; font-weight: 700; font-size: 1.1rem; cursor: pointer; letter-spacing: 1px; }
.pro-footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 50px; }
.pro-f-col h4 { font-size: 1rem; margin-bottom: 25px; color: #fff; letter-spacing: 1.5px; }
.pro-f-col ul { list-style: none; padding:0; margin:0;}
.pro-f-col ul li { margin-bottom: 12px; }
.pro-f-col ul li a { color: #777; text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
.pro-f-col ul li a:hover { color: #fff; }
.pro-footer-logo { font-size: 2.2rem; letter-spacing: 3px; margin-bottom: 15px; color: #0044FF; font-weight: 800;}
.brand-col p { color: #777; font-size: 0.9rem; line-height: 1.6; }
.pro-footer-bottom { border-top: 1px solid #222; padding-top: 25px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.copyright { color: #555; font-size: 0.85rem; }
.payment-icons { display: flex; gap: 15px; color: #666; font-size: 0.85rem; }

/* Mobile */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .nav-links { display: none; }
    .row-fields { flex-direction: column; }
    #form-qty { width: 100% !important; }
    .hero-buttons { flex-direction: column; }
}