/* ===== CSS Variables ===== */
:root {
    --primary: #23545B;
    --primary-dark: #1A3F44;
    --primary-light: #E9F5F7;
    --secondary: #00A86B;
    --accent: #FF6B35;
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A68;
    --text-muted: #8C8CA1;
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-gray: #F1F5F9;
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-light);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* ===== Header ===== */
.header {
    background: var(--bg-white);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 24px;
    gap: 24px;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo::before {
    content: '+';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 20px;
    font-weight: 700;
}

.search-container {
    flex: 1;
    max-width: 480px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-gray);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    padding: 10px 20px;
    transition: var(--transition);
}

.search-box:focus-within {
    background: var(--bg-white);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
}

.search-box input {
    border: none;
    outline: none;
    flex: 1;
    font-size: 15px;
    background: transparent;
    color: var(--text-primary);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    font-size: 18px;
    padding: 4px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 14px;
    font-weight: 500;
}

.user-menu a {
    color: var(--text-secondary);
}

.user-menu a:hover {
    color: var(--primary);
}

.header-icons {
    display: flex;
    gap: 16px;
}

.header-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 20px;
    transition: var(--transition);
}

.header-icons a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.cart-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background: #e74c3c;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    line-height: 1;
    pointer-events: none;
}

/* ===== Navigation ===== */
.nav-bar {
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

.main-nav {
    display: flex;
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.menu-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px 16px 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    border-right: 1px solid var(--border-color);
    margin-right: 24px;
}

.menu-icon i {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 8px;
    list-style: none;
}

.nav-links li a {
    display: block;
    padding: 16px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
}

.nav-links li a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100%;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-menu {
    list-style: none;
    padding: 12px;
}

.sidebar-menu li {
    /*padding: 14px 16px;*/
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.sidebar-menu a {
    display: flex;
    width: 100%;
    padding: 14px 16px;
    align-items: center;
    gap: 5px;
}

.sidebar-menu li:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.sidebar-menu li.active {
    background: var(--primary);
    color: white;
}

.sidebar-menu li i {
    width: 20px;
    text-align: center;
}

.badge {
    background: var(--accent);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    margin-left: auto;
}

/* ===== Main Container ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

/* ===== Product Grid ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.product-info {
    padding: 16px;
}

.product-brand {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.product-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.discount-rate {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
}

.sale-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.original-price {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: line-through;
}

.cart-button {
    width: 100%;
    padding: 12px;
    margin-top: 12px;
    background: var(--primary-light);
    border: none;
    color: var(--primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: var(--transition);
}

.cart-button:hover {
    background: var(--primary);
    color: white;
}

/* ===== Filter & Sort ===== */
.filter-section {
    background: var(--bg-white);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.filter-row {
    display: flex;
    gap: 32px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 14px;
}

.filter-tag {
    background: var(--bg-gray);
    border: 1px solid transparent;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-tag.active {
    background: var(--primary);
    color: white;
}

.sort-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.total-count {
    font-size: 14px;
    color: var(--text-secondary);
}

.sort-buttons {
    display: flex;
    gap: 8px;
}

.sort-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.sort-btn:hover {
    background: var(--bg-gray);
}

.sort-btn.active {
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-light);
}

/* ===== Page Title ===== */
.page-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin: 32px 0;
    color: var(--text-primary);
}

/* ===== Badges & Tags ===== */
.free-shipping {
    display: inline-block;
    background: var(--secondary);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    margin-top: 8px;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-primary);
    color: white;
    margin-top: 60px;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 24px 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    font-size: 24px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-contact {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

.footer-contact strong {
    display: block;
    font-size: 24px;
    color: white;
    margin: 8px 0;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-company {
    padding: 20px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    line-height: 1.9;
}

.footer-company p {
    margin: 0;
}

.footer-company .sep {
    margin: 0 8px;
    color: rgba(255,255,255,0.25);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-copy {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 18px;
    transition: all 0.2s;
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .header-top {
        flex-wrap: wrap;
        gap: 12px;
    }

    .search-container {
        order: 3;
        flex: 1 1 100%;
        max-width: none;
    }

    .user-menu {
        font-size: 13px;
        gap: 12px;
    }

    .nav-links {
        display: none;
    }

    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .header-icons {
        gap: 8px;
    }

    .header-icons a {
        width: 36px;
        height: 36px;
    }

    .footer-top {
        grid-template-columns: 1fr;
    }
}