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

:root {
    --primary-color: #0066cc;
    --secondary-color: #ff6b35;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --border-color: #ddd;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
}

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

/* 헤더 */
.header {
    background: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    isolation: isolate;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo a {
    text-decoration: none;
    color: var(--text-dark);
}

.logo h1 {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 5px;
}

.logo p {
    font-size: 14px;
    color: var(--text-light);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.auth-buttons, .user-menu {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-text {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 14px;
    transition: color 0.3s;
}

.btn-text:hover {
    color: var(--primary-color);
}

.cart-icon {
    position: relative;
    font-size: 24px;
    color: var(--text-dark);
    text-decoration: none;
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: bold;
}

/* 네비게이션 */
.nav {
    background: var(--bg-light);
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 100;
}

.nav::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent 0%,
        rgba(0, 102, 204, 0.1) 20%,
        rgba(0, 102, 204, 0.2) 50%,
        rgba(0, 102, 204, 0.1) 80%,
        transparent 100%
    );
}

.nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 18px 0;
    position: relative;
    z-index: 10;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: all 0.3s;
    padding: 8px 16px;
    border-radius: 6px;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav a:hover {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.05);
}

.nav a:hover::after {
    width: 80%;
}

/* 히어로 배너 */
.hero-banner {
    background: linear-gradient(135deg, #0066cc 0%, #4a90e2 50%, #00b4d8 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 180, 216, 0.3) 0%, transparent 50%);
    animation: wave 15s ease-in-out infinite;
}

.hero-banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: 
        repeating-linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.03) 0px,
            rgba(255, 255, 255, 0.03) 1px,
            transparent 1px,
            transparent 50px
        ),
        repeating-linear-gradient(
            0deg,
            rgba(255, 255, 255, 0.03) 0px,
            rgba(255, 255, 255, 0.03) 1px,
            transparent 1px,
            transparent 50px
        );
    opacity: 0.5;
}

@keyframes wave {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(20px) translateY(-10px);
    }
    50% {
        transform: translateX(-10px) translateY(10px);
    }
    75% {
        transform: translateX(10px) translateY(-5px);
    }
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 16px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(74, 144, 226, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 기능 섹션 */
.features {
    padding: 60px 20px;
    background: white;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    font-size: 14px;
}

/* 섹션 타이틀 */
.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-dark);
}

/* 카테고리 그리드 */
.product-categories {
    padding: 60px 20px;
    background: var(--bg-light);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.category-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.category-image {
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 8px;
    height: 250px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    display: block;
}

.category-card:hover .category-image img {
    transform: scale(1.05);
}

.category-card h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 600;
}

.category-card p {
    color: var(--text-light);
    font-size: 14px;
}

/* 상품 그리드 */
.featured-products {
    padding: 60px 20px;
    background: white;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 20px;
    margin-bottom: 40px;
}

.product-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.3s;
}

.product-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    transform: translateY(-5px);
}

.product-image {
    width: 100%;
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    display: block;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: 20px;
}

.product-category {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.product-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.product-description {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.product-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.product-origin {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 5px;
}

.product-badge {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-top: 10px;
}

/* 푸터 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 40px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 600;
}

.footer-section p {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 8px;
}

.phone-number {
    font-size: 20px !important;
    font-weight: 700;
    color: var(--secondary-color) !important;
    margin: 10px 0 !important;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
}

.company-info {
    margin-bottom: 15px;
}

.company-info p {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 5px;
}

.footer-copyright {
    text-align: center;
}

.footer-copyright p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    font-size: 16px;
    transition: all 0.3s;
}

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

.btn-primary-solid:hover {
    background: #0052a3;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #e55a2b;
}

.btn-outline {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* 폼 스타일 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

/* 반응형 */
@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 15px;
    }

    .nav ul {
        flex-wrap: wrap;
        gap: 15px;
        padding: 12px 0;
    }

    .nav a {
        padding: 6px 12px;
        font-size: 14px;
    }

    .hero-banner {
        padding: 60px 20px;
    }

    .banner-content h2 {
        font-size: 32px;
    }

    .banner-content p {
        font-size: 16px;
        margin-bottom: 30px;
    }

    .btn-primary {
        padding: 14px 35px;
        font-size: 15px;
    }

    .section-title {
        font-size: 24px;
    }

    .category-grid,
    .product-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}