/* ========== CSS 变量 & 全局重置 ========== */
:root {
    --primary: #2563EB;
    --primary-light: #3B82F6;
    --primary-dark: #1D4ED8;
    --primary-bg: #EFF6FF;
    --success: #10B981;
    --success-bg: #ECFDF5;
    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --danger: #EF4444;
    --danger-bg: #FEF2F2;
    --info: #6366F1;
    --info-bg: #EEF2FF;

    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --text-white: #FFFFFF;

    --bg-body: #F1F5F9;
    --bg-card: #FFFFFF;
    --bg-hover: #F8FAFC;
    --bg-sidebar: #1E293B;
    --bg-sidebar-hover: #334155;

    --border-color: #E2E8F0;
    --border-dark: #CBD5E1;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

    --sidebar-width: 240px;
    --topbar-height: 60px;
    --transition: all 0.2s ease;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "Fira Code", "Source Code Pro", "Consolas", "Monaco", monospace;
}

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

html, body {
    height: 100%;
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }

/* ========== 主布局 ========== */
#app {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ========== 侧边栏 ========== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    color: var(--text-white);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: var(--transition);
    z-index: 100;
}

.sidebar.collapsed {
    margin-left: calc(-1 * var(--sidebar-width));
}

.sidebar-logo {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-icon {
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 4px;
    transition: var(--transition);
    font-size: 14px;
    position: relative;
}

.nav-item:hover {
    background: var(--bg-sidebar-hover);
    color: var(--text-white);
}

.nav-item.active {
    background: var(--primary);
    color: var(--text-white);
    font-weight: 500;
}

/* 侧边栏分割线（辅助功能区分） */
.sidebar-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.12);
    margin: 10px 8px;
}

.nav-item-aux {
    font-size: 13px;
    opacity: 0.7;
}

.nav-item-aux:hover {
    opacity: 1;
}

.sidebar-version {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.35);
    text-align: center;
    padding: 4px 0 6px;
    letter-spacing: 0.5px;
    font-family: var(--font-mono, 'LXGWWenKaiMono', monospace);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 6px;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: var(--primary-light);
    border-radius: 0 2px 2px 0;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.user-detail {
    overflow: hidden;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-white);
    white-space: nowrap;
}

.user-role {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    white-space: nowrap;
}

/* ========== 主内容区 ========== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========== 顶部栏 ========== */
.topbar {
    height: var(--topbar-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    flex-shrink: 0;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    display: none;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.menu-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.page-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px 14px;
    width: 240px;
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-box input {
    border: none;
    background: none;
    width: 100%;
    color: var(--text-primary);
    font-size: 13px;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.icon-btn {
    position: relative;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--danger);
    color: var(--text-white);
    font-size: 10px;
    font-weight: 600;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* ========== 页面容器 ========== */
.page-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* ========== 通用组件 ========== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

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

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

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

.btn-danger:hover {
    background: #DC2626;
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-warning:hover {
    background: #D97706;
}

.btn-outline {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-text {
    background: transparent;
    color: var(--primary);
    border: none;
    padding: 4px 8px;
}

.btn-text:hover {
    background: var(--bg-body);
}

.btn-sm {
    padding: 5px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 12px 28px;
    font-size: 15px;
}

.btn-block {
    display: flex;
    width: 100%;
    justify-content: center;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    gap: 4px;
}

.tag-primary { background: var(--primary-bg); color: var(--primary); }
.tag-success { background: var(--success-bg); color: var(--success); }
.tag-warning { background: var(--warning-bg); color: var(--warning); }
.tag-danger { background: var(--danger-bg); color: var(--danger); }
.tag-info { background: var(--info-bg); color: var(--info); }
.tag-default { background: var(--bg-body); color: var(--text-secondary); }

/* 表格 */
.table-wrapper {
    overflow-x: auto;
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

table.data-table th {
    background: var(--bg-body);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-color);
}

table.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

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

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

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

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
}

.modal.modal-lg { max-width: 800px; }
.modal.modal-xl { max-width: 1100px; }

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    color: var(--text-muted);
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    display: flex;
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-shrink: 0;
}

/* Toast 通知 */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 280px;
    max-width: 400px;
    animation: slideInRight 0.3s ease;
    border-left: 4px solid var(--primary);
}

.toast.success { border-left-color: var(--success); }
.toast.warning { border-left-color: var(--warning); }
.toast.error { border-left-color: var(--danger); }

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast.success .toast-icon { color: var(--success); }
.toast.warning .toast-icon { color: var(--warning); }
.toast.error .toast-icon { color: var(--danger); }
.toast .toast-icon { color: var(--primary); }

.toast-message {
    font-size: 14px;
    color: var(--text-primary);
    flex: 1;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 加载动画 */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 16px;
}

.loading-overlay .loading-spinner {
    width: 36px;
    height: 36px;
    border-width: 3px;
}

.loading-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 12px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
}

.empty-state-text {
    font-size: 14px;
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

.pagination-info {
    font-size: 13px;
    color: var(--text-secondary);
}

.pagination-btns {
    display: flex;
    gap: 4px;
}

.page-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    transition: var(--transition);
    background: var(--bg-card);
}

.page-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
    }

    .sidebar.collapsed {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    .menu-toggle {
        display: flex;
    }

    .search-box {
        width: 160px;
    }

    .page-container {
        padding: 16px;
    }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}