/* ========================================
   遥控器平台后台管理系统 - CSS
   ======================================== */

:root {
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --primary-light: #8597e8;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --darker: #0f172a;
    --light: #f8fafc;
    --lighter: #f1f5f9;
    --white: #ffffff;
    --gray: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    color: var(--dark);
    background: var(--light);
    line-height: 1.6;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* 顶部导航 */
.admin-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.admin-header .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    font-size: 18px;
    font-weight: 600;
}

.admin-header .logo i {
    font-size: 24px;
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 20px;
    color: white;
}

.admin-header .user-info .avatar {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-header .logout-btn {
    padding: 8px 16px;
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.admin-header .logout-btn:hover {
    background: rgba(255,255,255,0.3);
}

/* 侧边栏 */
.admin-sidebar {
    position: fixed;
    left: 0;
    top: 64px;
    bottom: 0;
    width: 240px;
    background: white;
    border-right: 1px solid var(--border);
    padding: 20px 0;
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: 20px;
}

.sidebar-section-title {
    padding: 8px 24px;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-sidebar a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: var(--secondary);
    transition: var(--transition);
    border-left: 3px solid transparent;
    font-size: 14px;
}

.admin-sidebar a:hover, 
.admin-sidebar a.active {
    background: var(--lighter);
    color: var(--primary);
    border-left-color: var(--primary);
}

.admin-sidebar a i {
    width: 20px;
    text-align: center;
}

/* 主内容区 */
.admin-content {
    margin-left: 240px;
    padding: 24px;
    margin-top: 64px;
    min-height: calc(100vh - 64px);
}

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

.page-header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--dark);
}

.page-header .breadcrumb {
    font-size: 14px;
    color: var(--gray);
    margin-top: 4px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-card .icon {
    width: 56px;
    height: 56px;
    background: var(--lighter);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 24px;
}

.stat-card .info h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

.stat-card .info p {
    font-size: 14px;
    color: var(--gray);
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

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

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
}

.card-body {
    padding: 24px;
}

/* 表格样式 */
.table-wrapper {
    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(--border);
}

.data-table th {
    background: var(--lighter);
    font-weight: 600;
    font-size: 13px;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    font-size: 14px;
    color: var(--dark);
}

.data-table tr:hover td {
    background: var(--light);
}

/* 标签 */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary { background: #e0e7ff; color: var(--primary); }
.badge-success { background: #d1fae5; color: var(--success); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-secondary { background: var(--lighter); color: var(--secondary); }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

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

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-icon {
    padding: 8px;
    width: 32px;
    height: 32px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--dark);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* 搜索栏 */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}

.search-bar button {
    padding: 10px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.pagination button,
.pagination span {
    padding: 8px 14px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--dark);
    cursor: pointer;
    font-size: 14px;
}

.pagination button:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* 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: 200;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-dialog {
    background: white;
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--border);
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--secondary);
}

/* 操作按钮 */
.actions {
    display: flex;
    gap: 8px;
}

.actions .btn {
    padding: 6px 12px;
    font-size: 12px;
}

/* 响应式 */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .admin-sidebar {
        display: none;
    }
    .admin-content {
        margin-left: 0;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .search-bar {
        flex-direction: column;
    }
}