/* 后台管理样式 */

.admin-container {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
}

.admin-nav {
    flex: 1;
    margin-top: 24px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    margin-bottom: 4px;
    border-radius: 12px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.15);
}

.nav-item.active {
    background: var(--primary-color);
    color: white;
}

.sidebar-footer {
    border-top: 1px solid var(--glass-border);
    padding-top: 16px;
}

.admin-main {
    flex: 1;
    margin-left: 260px;
    padding: 24px;
    min-height: 100vh;
}

/* 页面 */
.page {
    max-width: 1200px;
    margin: 0 auto;
}

.page.hidden {
    display: none;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page h2 {
    font-size: 1.75rem;
    margin-bottom: 24px;
}

/* 登录卡片 */
.login-card {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    text-align: center;
}

.login-card h2 {
    margin-bottom: 32px;
}

.login-card h2 i {
    margin-right: 12px;
    color: var(--primary-color);
}

/* 表单 */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

.form-group input[type="range"] {
    padding: 0;
    background: transparent;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

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

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

.btn-sm {
    padding: 8px 12px;
    font-size: 12px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 数据表格 */
.table-wrapper {
    padding: 20px;
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
}

.data-table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

.data-table img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
}

.action-btns {
    display: flex;
    gap: 8px;
}

/* 设置表单 */
.settings-form {
    max-width: 600px;
    padding: 32px;
}

.settings-form .form-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.settings-form .form-group label {
    width: 150px;
    flex-shrink: 0;
}

.settings-form .form-group input {
    flex: 1;
}

.settings-form .form-group span {
    width: 60px;
    text-align: right;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h3 {
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
}

.modal-close:hover {
    opacity: 1;
}

.modal-body {
    padding: 24px;
}

/* 响应式 */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .admin-main {
        margin-left: 0;
    }

    .admin-container {
        flex-direction: column;
    }

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