:root {
    --primary-color: #2e7d32;
    --primary-hover: #1b5e20;
    --primary-light: #e8f5e9;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-main: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

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

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background-color: var(--bg-main);
}

.btn-danger {
    background-color: #ef4444;
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

/* Hero Section */
.hero {
    background-color: var(--primary-light);
    padding: 2.5rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero .highlight {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-muted);
}

/* Guide Section (Cleaned up) */
.guide-section {
    padding: 3rem 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.guide-title {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.guide-steps {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.guide-step {
    flex: 1;
    min-width: 250px;
    text-align: center;
}

.guide-step h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.guide-step p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Search Bar */
.search-container {
    max-width: 600px;
    margin: 2rem auto 0;
    display: flex;
    gap: 0.5rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus {
    border-color: var(--primary-color);
}

/* Filters */
.filters {
    display: flex;
    gap: 0.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-white);
    border-radius: 9999px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

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

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

/* Items Grid */
.items-section {
    padding-bottom: 4rem;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.item-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.item-img-container {
    width: 100%;
    height: 200px;
    background-color: #f3f4f6;
    overflow: hidden;
}

.item-img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.item-card:hover .item-img-container img {
    transform: scale(1.05);
}

.item-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.item-category {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.item-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.item-date {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: auto;
}

/* Detail Page */
.detail-container {
    display: flex;
    gap: 3rem;
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 4rem;
}

.detail-image {
    flex: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background-color: #f3f4f6;
}

.detail-image img {
    width: 100%;
    height: auto;
    display: block;
}

.detail-info {
    flex: 1;
}

.detail-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.detail-desc {
    margin: 1.5rem 0;
    white-space: pre-line;
    color: var(--text-muted);
}

.back-link {
    display: inline-block;
    margin: 2rem 0 1rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-main);
    padding: 1rem;
}

.login-box {
    background: var(--bg-white);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

/* Admin Layout */
.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    margin-top: 2rem;
    margin-bottom: 4rem;
}

.admin-sidebar {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
    height: fit-content;
}

.admin-menu-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.admin-menu-btn:hover {
    background-color: var(--bg-main);
}

.admin-menu-btn.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.admin-panel {
    display: none;
}

.admin-panel.active {
    display: block;
}

.admin-view-switch {
    align-items: center;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
}

.admin-view-switch span {
    color: var(--text-muted);
    flex: 0 0 auto;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0 0.5rem;
}

.admin-view-btn {
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-main);
    cursor: pointer;
    flex: 1;
    font: inherit;
    font-weight: 600;
    min-height: 2.5rem;
    padding: 0.625rem 0.75rem;
}

.admin-view-btn.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.image-preview {
    margin-top: 1rem;
    max-width: 300px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.image-preview img {
    width: 100%;
    display: block;
}

/* Table */
.table-container {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    font-weight: 600;
    color: var(--text-muted);
    background-color: var(--bg-main);
}

.admin-table img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: var(--text-main);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-weight: 500;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease-out;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

/* Utilities */
.text-center { text-align: center; }
.w-100 { width: 100%; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.text-muted { color: var(--text-muted); }
.error-msg { color: #ef4444; font-size: 0.875rem; }

/* Footer */
.footer {
    background-color: white;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .header-content {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.75rem;
        height: auto;
        padding-top: 0.875rem;
        padding-bottom: 0.875rem;
    }

    .logo {
        font-size: 1.125rem;
        line-height: 1.25;
    }

    .nav {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        width: 100%;
    }

    .nav .btn {
        min-height: 2.75rem;
        padding: 0.625rem 0.75rem;
        width: 100%;
    }

    .btn {
        min-height: 2.75rem;
    }

    .detail-container {
        flex-direction: column;
    }
    
    .admin-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 1rem;
        margin-bottom: 2rem;
    }

    .admin-sidebar {
        border-radius: var(--radius-md);
        overflow-x: auto;
        padding: 0.5rem;
        position: sticky;
        top: 0;
        z-index: 90;
    }

    .admin-menu {
        display: grid;
        grid-template-columns: repeat(2, minmax(8rem, 1fr));
        gap: 0.5rem;
        min-width: max-content;
    }

    .admin-menu-btn {
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        min-height: 2.75rem;
        padding: 0.75rem 1rem;
        text-align: center;
        white-space: nowrap;
    }

    .admin-menu-btn.active {
        border-color: var(--primary-color);
        border-left-color: var(--primary-color);
    }

    .section-title {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .admin-view-switch {
        align-items: stretch;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .admin-view-switch span {
        grid-column: 1 / -1;
        padding: 0.25rem 0.25rem 0;
    }

    .card {
        border-radius: var(--radius-md);
        padding: 1rem;
    }

    .form-group {
        margin-bottom: 1rem;
    }

    .form-group input[type="file"] {
        width: 100%;
    }

    .form-group input[type="text"],
    .form-group input[type="email"],
    .form-group input[type="password"],
    .form-group select,
    .form-group textarea {
        min-height: 2.75rem;
        font-size: 1rem;
    }

    .image-preview {
        max-width: 100%;
    }

    .table-container {
        overflow-x: visible;
    }

    .admin-table,
    .admin-table thead,
    .admin-table tbody,
    .admin-table tr,
    .admin-table td {
        display: block;
        width: 100%;
    }

    .admin-table thead {
        display: none;
    }

    .admin-table tr {
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        margin-bottom: 0.875rem;
        overflow: hidden;
    }

    .admin-table td {
        align-items: center;
        border-bottom: 1px solid var(--border-color);
        display: grid;
        gap: 0.75rem;
        grid-template-columns: 5rem 1fr;
        min-height: 3rem;
        padding: 0.75rem;
    }

    .admin-table td:last-child {
        border-bottom: none;
    }

    .admin-table td::before {
        color: var(--text-muted);
        content: attr(data-label);
        font-size: 0.875rem;
        font-weight: 600;
    }

    .admin-table img {
        height: 72px;
        width: 72px;
    }

    .admin-table .btn {
        width: 100%;
    }

    #toast-container {
        left: 1rem;
        right: 1rem;
        top: 1rem;
    }

    .toast {
        padding: 0.875rem 1rem;
        transform: translateY(-120%);
        width: 100%;
    }

    .toast.show {
        transform: translateY(0);
    }
}