/* ===== 后台管理样式 ===== */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 24px;
}

.login-card {
    background: #fff;
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-card h2 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text);
    font-size: 1.5rem;
}

.login-card h2 i {
    color: var(--primary);
    margin-right: 8px;
}

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    font-weight: 500;
}

.alert-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.admin-nav {
    background: #1e293b;
}

.admin-nav .logo {
    color: #fff;
}

.admin-nav .nav-links a {
    color: #94a3b8;
}

.admin-nav .nav-links a:hover,
.admin-nav .nav-links a.active {
    background: var(--primary);
    color: #fff;
}

.admin-container {
    display: flex;
    min-height: calc(100vh - 64px);
}

.admin-sidebar {
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--border);
    padding: 24px 16px;
    flex-shrink: 0;
}

.admin-sidebar h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 16px;
    padding-left: 12px;
    letter-spacing: 1px;
}

.admin-sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 10px;
    color: var(--text);
    font-weight: 500;
    margin-bottom: 4px;
    transition: var(--transition);
}

.admin-sidebar a:hover,
.admin-sidebar a.active {
    background: #f1f5f9;
    color: var(--primary);
}

.admin-main {
    flex: 1;
    padding: 32px;
    background: var(--bg);
}

.admin-main .card {
    padding: 24px;
    margin-bottom: 24px;
}

.admin-form .form-group {
    margin-bottom: 20px;
}

.admin-form .form-group label {
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}

.admin-form input,
.admin-form textarea,
.admin-form select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: var(--transition);
    font-family: inherit;
}

.admin-form input:focus,
.admin-form textarea:focus,
.admin-form select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
    outline: none;
}

.table-responsive {
    overflow-x: auto;
    margin-top: 16px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.admin-table th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tr:hover td {
    background: #f8fafc;
}

.badge {
    background: var(--primary-light);
    color: #fff;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status.published {
    background: #dcfce7;
    color: #16a34a;
}

.status.draft {
    background: #fef3c7;
    color: #d97706;
}

.actions {
    display: flex;
    gap: 6px;
}

.actions .btn {
    padding: 6px 12px;
    border-radius: 8px;
}

/* 响应式 */
@media (max-width: 768px) {
    .admin-container {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 16px;
    }

    .admin-sidebar a {
        display: inline-flex;
        margin-right: 8px;
    }

    .admin-main {
        padding: 16px;
    }

    .admin-table th,
    .admin-table td {
        padding: 8px 10px;
        font-size: 0.8rem;
    }
}