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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
    margin: 0;
    padding: 0;
}

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

/* Header */
header {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
    font-size: 24px;
    font-weight: bold;
}

.logo img {
    max-height: 50px;
    width: auto;
}

.logo span {
    display: inline-block;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-link:hover,
.nav-link.active {
    opacity: 0.7;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.admin-btn {
    background: #333;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.admin-btn:hover {
    background: #555;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: white;
    transition: 0.3s;
}

/* Page Hero */
.page-hero {
    height: 400px;
    background-size: cover;
    background-position: center;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.page-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.page-hero h1 {
    font-size: 48px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Content Section */
.content-section {
    padding: 80px 0;
}

.content-section h2 {
    font-size: 36px;
    margin-bottom: 40px;
    text-align: center;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.about-card {
    padding: 30px;
    background: #f5f5f5;
    border-radius: 8px;
    text-align: center;
}

.about-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

/* Products Grid */
.filter-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn.active,
.filter-btn:hover {
    background: #000;
    color: white;
    border-color: #000;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.contact-form button {
    width: 100%;
    padding: 12px;
    background: #000;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.contact-form button:hover {
    opacity: 0.8;
}

/* Footer */
footer {
    background: #000;
    color: white;
    padding: 40px 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #000;
        flex-direction: column;
        padding: 20px;
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .page-hero {
        height: 300px;
    }

    .page-hero h1 {
        font-size: 32px;
    }
}