:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success-color: #22c55e;
    --danger-color: #dc2626;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* Admin Container */
.admin-container {
    min-height: 100vh;
}

/* Header */
.admin-header {
    background-color: var(--card-bg);
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.admin-header p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Main Content */
.admin-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem 2rem;
}

.admin-section {
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.25rem;
    color: var(--text-main);
}

.product-count {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.product-count span {
    font-weight: 700;
    color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

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

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

.btn-secondary:hover {
    background-color: var(--card-bg);
    border-color: var(--primary-color);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: transform 0.2s;
}

.btn-icon:hover {
    transform: scale(1.2);
}

.btn-edit:hover {
    filter: brightness(1.2);
}

.btn-delete:hover {
    filter: brightness(1.2);
}

/* Form */
.product-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.95rem;
}

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

.form-actions {
    display: flex;
    gap: 0.75rem;
}

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

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

.product-table thead {
    background-color: var(--bg-color);
}

.product-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-main);
    border-bottom: 2px solid var(--border-color);
}

.product-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.product-table tbody tr:hover {
    background-color: var(--bg-color);
}

.product-thumb {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.empty-state.error {
    color: var(--danger-color);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}