/* 管理后台样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --sidebar-bg: #0d1117;
    --sidebar-width: 220px;
    --main-bg: #f0f2f5;
    --card-bg: #ffffff;
    --text-dark: #1a1a2e;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --border-color: #e5e7eb;
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --success: #22c55e;
    --success-dark: #16a34a;
    --purple: #8b5cf6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--main-bg);
    color: var(--text-dark);
    overflow: hidden;
}

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

/* 侧边导航 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo .brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, #00d4ff, #0ea5e9);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: #0a0e14;
    box-shadow: 0 4px 12px rgba(0,212,255,0.3);
}

.sidebar-logo span {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
}

.nav-item:hover {
    background: rgba(255,255,255,0.06);
    color: #fff;
}

.nav-item.active {
    background: rgba(14,165,233,0.15);
    color: var(--primary);
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.admin-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 15px;
}

.admin-name {
    color: #fff;
    font-size: 13px;
    font-weight: 600;
}

.admin-role {
    color: rgba(255,255,255,0.4);
    font-size: 11px;
}

.logout-btn {
    display: block;
    text-align: center;
    padding: 10px;
    border-radius: 8px;
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}

.logout-btn:hover {
    background: rgba(239,68,68,0.25);
}

/* 主内容区 */
.admin-main {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.page-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
}

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

.header-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    align-items: center;
    flex-wrap: wrap;
}

/* 搜索框 */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box svg {
    position: absolute;
    left: 12px;
    width: 18px;
    height: 18px;
    color: var(--text-light);
    pointer-events: none;
}

.search-box input {
    padding: 10px 14px 10px 38px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    width: 280px;
    outline: none;
    transition: all 0.2s;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14,165,233,0.12);
}

.filter-select {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    background: #fff;
    cursor: pointer;
    outline: none;
}

.filter-select:focus {
    border-color: var(--primary);
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-total { background: rgba(14,165,233,0.1); color: var(--primary); }
.stat-normal { background: rgba(34,197,94,0.1); color: var(--success); }
.stat-banned { background: rgba(239,68,68,0.1); color: var(--danger); }
.stat-frozen { background: rgba(245,158,11,0.1); color: var(--warning); }

.stat-label {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

/* 用户表格 */
.table-container {
    background: var(--card-bg);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    overflow-x: auto;
}

.user-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 900px;
}

.user-table thead {
    background: #f9fafb;
}

.user-table th {
    padding: 14px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.user-table td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.user-table tbody tr:hover {
    background: #f9fafb;
}

.user-table tbody tr:last-child td {
    border-bottom: none;
}

/* 状态标签 */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.status-badge.normal {
    background: rgba(34,197,94,0.1);
    color: var(--success-dark);
}

.status-badge.banned {
    background: rgba(239,68,68,0.1);
    color: var(--danger-dark);
}

.status-badge.frozen {
    background: rgba(245,158,11,0.1);
    color: var(--warning-dark);
}

.status-badge.muted {
    background: rgba(139,92,246,0.1);
    color: var(--purple);
}

.status-badge.admin {
    background: rgba(14,165,233,0.1);
    color: var(--primary-dark);
}

/* 发言权限显示 */
.speak-info {
    font-size: 13px;
    color: var(--text-gray);
}

.speak-info .limit-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.speak-info .limit-unlimited {
    background: rgba(34,197,94,0.1);
    color: var(--success-dark);
}

.speak-info .limit-limited {
    background: rgba(245,158,11,0.1);
    color: var(--warning-dark);
}

.speak-info .limit-none {
    background: rgba(239,68,68,0.1);
    color: var(--danger-dark);
}

/* 操作按钮 */
.action-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.action-btn {
    padding: 6px 10px;
    border: none;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.action-btn svg {
    width: 14px;
    height: 14px;
}

.action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-detail { background: rgba(14,165,233,0.1); color: var(--primary-dark); }
.btn-detail:hover:not(:disabled) { background: rgba(14,165,233,0.2); }

.btn-ban { background: rgba(239,68,68,0.1); color: var(--danger-dark); }
.btn-ban:hover:not(:disabled) { background: rgba(239,68,68,0.2); }

.btn-unban { background: rgba(34,197,94,0.1); color: var(--success-dark); }
.btn-unban:hover:not(:disabled) { background: rgba(34,197,94,0.2); }

.btn-freeze { background: rgba(245,158,11,0.1); color: var(--warning-dark); }
.btn-freeze:hover:not(:disabled) { background: rgba(245,158,11,0.2); }

.btn-unfreeze { background: rgba(34,197,94,0.1); color: var(--success-dark); }
.btn-unfreeze:hover:not(:disabled) { background: rgba(34,197,94,0.2); }

.btn-mute { background: rgba(139,92,246,0.1); color: var(--purple); }
.btn-mute:hover:not(:disabled) { background: rgba(139,92,246,0.2); }

.btn-unmute { background: rgba(34,197,94,0.1); color: var(--success-dark); }
.btn-unmute:hover:not(:disabled) { background: rgba(34,197,94,0.2); }

.btn-limit { background: rgba(14,165,233,0.1); color: var(--primary-dark); }
.btn-limit:hover:not(:disabled) { background: rgba(14,165,233,0.2); }

.btn-login { background: rgba(139,92,246,0.1); color: var(--purple); }
.btn-login:hover:not(:disabled) { background: rgba(139,92,246,0.2); }

/* 背景管理 */
.bg-sections {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 20px;
}

.bg-card {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.bg-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background: rgba(14,165,233,0.05);
}

.upload-area svg {
    width: 40px;
    height: 40px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.upload-area:hover svg, .upload-area.dragover svg {
    color: var(--primary);
}

.upload-area p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 4px;
}

.upload-area span {
    color: var(--text-light);
    font-size: 12px;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.preset-item {
    aspect-ratio: 16/9;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    background-size: cover;
    background-position: center;
    position: relative;
}

.preset-item:hover {
    transform: scale(1.03);
}

.preset-item.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary);
}

.preset-item.active::after {
    content: '✓';
    position: absolute;
    top: 4px;
    right: 6px;
    color: #fff;
    font-size: 16px;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.opacity-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.opacity-control label {
    font-size: 13px;
    color: var(--text-gray);
}

.opacity-control input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    appearance: none;
    outline: none;
}

.opacity-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
}

.opacity-control span {
    font-size: 13px;
    color: var(--primary);
    text-align: right;
}

.btn-reset {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-gray);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

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

.bg-preview {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 12px;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: overlayIn 0.2s ease;
}

.modal-overlay.hidden {
    display: none;
}

@keyframes overlayIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    background: #fff;
    border-radius: 16px;
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.25s ease;
}

.modal-sm {
    max-width: 400px;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

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

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

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-gray);
    cursor: pointer;
    padding: 4px;
}

.modal-close:hover {
    color: var(--text-dark);
}

.modal-close svg {
    width: 22px;
    height: 22px;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-body p {
    font-size: 15px;
    color: var(--text-dark);
    line-height: 1.6;
}

.modal-input-group {
    margin-top: 16px;
}

.modal-input-group.hidden {
    display: none;
}

.modal-input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-gray);
    margin-bottom: 6px;
}

.modal-input-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s;
}

.modal-input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14,165,233,0.12);
}

.modal-footer {
    display: flex;
    gap: 10px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    justify-content: flex-end;
}

.btn-cancel {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    color: var(--text-gray);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn-cancel:hover {
    background: #f9fafb;
}

.btn-confirm {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

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

/* 详情弹窗内容 */
.detail-row {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    width: 120px;
    font-size: 14px;
    color: var(--text-gray);
    flex-shrink: 0;
}

.detail-value {
    font-size: 14px;
    color: var(--text-dark);
    font-weight: 500;
    word-break: break-all;
}

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

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 15px;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    .sidebar-logo span,
    .nav-item span,
    .admin-info > div,
    .logout-btn {
        display: none;
    }
    .nav-item {
        justify-content: center;
    }
    .search-box input {
        width: 200px;
    }
    .bg-sections {
        grid-template-columns: 1fr;
    }
}