/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.6;
}

/* Header Styles */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    padding: 25px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

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

.header-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

@media(min-width: 768px) {
    .header-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.brand-title {
    font-size: 22px;
    font-weight: 800;
    color: #0f172a;
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

.brand-policy {
    font-size: 13px;
    color: #dc2626;
    font-weight: 750;
    margin-top: 4px;
    background: #fef2f2;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid #fee2e2;
    display: inline-block;
}

/* Search Box */
.search-box-wrapper input {
    width: 100%;
    max-width: 380px;
    padding: 12px 18px;
    border: 2px solid #cbd5e1;
    border-radius: 10px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
    background-color: #f8fafc;
}

.search-box-wrapper input:focus {
    border-color: #2563eb;
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* Main Content */
.main-content {
    padding: 30px 0 60px 0;
}

/* Catalog Section & Thumbnail Grid */
.catalog-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 18px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
}

.product-card {
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -5px rgba(0,0,0,0.08);
}

.product-img-box {
    width: 100%;
    height: 240px;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.product-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.product-card:hover .product-img-box img {
    transform: scale(1.05);
}

/* Folder Badge */
.folder-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(37, 99, 235, 0.9);
    color: #ffffff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    backdrop-filter: blur(4px);
}

/* Watermark Mã in */
.watermark-badge {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.product-info {
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: #ffffff;
}

.product-name {
    font-size: 14px;
    font-weight: 700;
    color: #0f172a;
}

.product-price {
    font-size: 14px;
    font-weight: 700;
    color: #e11d48;
}

/* Zalo Floating Button */
.zalo-float {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background-color: #0068ff;
    color: white;
    padding: 12px 20px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(0, 104, 255, 0.4);
    z-index: 1000;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.2s;
}

.zalo-float:hover {
    transform: scale(1.05);
}