:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --hot-badge: #ef4444;
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
}

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn-login {
    background: var(--primary-color);
    color: var(--bg-white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
}

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

/* Hero Section */
.hero {
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 5rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background: var(--bg-white);
    color: var(--primary-color);
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Featured Products */
.featured {
    padding: 4rem 0;
    background: var(--bg-light);
}

.featured h2 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: 2.5rem;
    font-weight: 600;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.product-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    position: relative;
    transition: box-shadow 0.2s;
}

.product-card:hover {
    box-shadow: var(--shadow);
}

.hot-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--hot-badge);
    color: var(--bg-white);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-image {
    width: 100%;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.product-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.product-card p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.btn-detail {
    display: block;
    width: 100%;
    text-align: center;
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s;
}

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

/* Categories */
.categories {
    padding: 4rem 0;
}

.categories h2 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: 2.5rem;
    font-weight: 600;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.category-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.category-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.category-card h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.category-card p {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: var(--bg-white);
    text-align: center;
    padding: 2rem 0;
}

footer p {
    font-size: 0.875rem;
    opacity: 0.8;
}