/* ============================================================
   通用样式 common.css
   多学校SaaS管理系统 - 商务蓝色调设计系统
   ============================================================ */

/* 设计变量 - 蓝色商务调色板 */
:root {
    /* 主色系 - 蓝色 */
    --primary-50:  #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color:  #ef4444;
    --info-color:    #0ea5e9;

    /* 文字色 */
    --text-primary:   #0f172a;
    --text-secondary: #475569;
    --text-muted:     #94a3b8;
    --text-inverse:   #ffffff;

    /* 边框与背景 */
    --border-color:    #e2e8f0;
    --border-light:    #f1f5f9;
    --bg-page:         #f8fafc;
    --bg-card:         #ffffff;
    --bg-hover:        #f1f5f9;
    --bg-active:       #eff6ff;

    /* 阴影 */
    --shadow-xs:  0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm:  0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md:  0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg:  0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-xl:  0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
    --shadow-primary: 0 4px 14px rgba(37, 99, 235, 0.25);

    /* 圆角 */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* 布局 */
    --sidebar-width: 240px;
    --header-height: 64px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* 重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--primary-700);
}

img {
    max-width: 100%;
    vertical-align: middle;
}

ul, ol {
    list-style: none;
}

/* ========== 布局工具 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

/* ========== 文字工具 ========== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary-600); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 12px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.font-bold { font-weight: 600; }
.font-medium { font-weight: 500; }

/* ========== 间距 ========== */
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.p-16 { padding: 16px; } .p-24 { padding: 24px; }

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    line-height: 1.5;
    background: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}
.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 主按钮 - 蓝色渐变 */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: #fff;
    border-color: var(--primary-600);
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    border-color: var(--primary-700);
    color: #fff;
    box-shadow: var(--shadow-primary);
    transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2);
}

/* 默认按钮 */
.btn-default {
    background-color: #fff;
    color: var(--text-secondary);
    border-color: var(--border-color);
}
.btn-default:hover:not(:disabled) {
    color: var(--primary-600);
    border-color: var(--primary-400);
    background-color: var(--primary-50);
}

/* 危险按钮 */
.btn-danger {
    background-color: var(--danger-color);
    color: #fff;
    border-color: var(--danger-color);
}
.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
    border-color: #dc2626;
    color: #fff;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
    transform: translateY(-1px);
}

/* 成功按钮 */
.btn-success {
    background-color: var(--success-color);
    color: #fff;
    border-color: var(--success-color);
}
.btn-success:hover:not(:disabled) {
    background-color: #059669;
    border-color: #059669;
    color: #fff;
}

.btn-sm { padding: 5px 12px; font-size: 12px; border-radius: var(--radius-xs); }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-block { display: flex; width: 100%; }

/* ========== 卡片 ========== */
.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: box-shadow var(--transition-base);
}
.card:hover {
    box-shadow: var(--shadow-md);
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(to bottom, #fafbfc, #fff);
}
.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.card-title::before {
    content: '';
    width: 3px;
    height: 14px;
    background: linear-gradient(to bottom, var(--primary-500), var(--primary-700));
    border-radius: 2px;
}
.card-body { padding: 20px; }
.card-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border-light);
    background-color: var(--bg-hover);
}

/* ========== 表单 ========== */
.form-group { margin-bottom: 18px; }
.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}
.form-label .required { color: var(--danger-color); margin-left: 2px; }

.form-control {
    width: 100%;
    padding: 9px 12px;
    font-size: 14px;
    color: var(--text-primary);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    line-height: 1.5;
    font-family: inherit;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background-color: #fff;
}
.form-control::placeholder { color: var(--text-muted); }
.form-control:disabled {
    background-color: var(--bg-hover);
    color: var(--text-muted);
    cursor: not-allowed;
}
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

.form-text { margin-top: 4px; font-size: 12px; color: var(--text-muted); }
.form-inline {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.form-inline .form-group { margin-bottom: 0; }

/* 复选框/单选 */
.checkbox-wrapper, .radio-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    font-size: 13px;
    color: var(--text-secondary);
}
.checkbox-wrapper input, .radio-wrapper input {
    width: 15px;
    height: 15px;
    cursor: pointer;
    accent-color: var(--primary-600);
}

/* ========== 表格 ========== */
.table-wrapper { overflow-x: auto; }
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.table th, .table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}
.table th {
    background-color: var(--bg-hover);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.table tbody tr {
    transition: background-color var(--transition-fast);
}
.table tbody tr:hover {
    background-color: var(--primary-50);
}
.table .actions { white-space: nowrap; }
.table .actions .btn { margin-right: 6px; }
.table .actions .btn:last-child { margin-right: 0; }

/* ========== 标签 ========== */
.tag {
    display: inline-block;
    padding: 2px 10px;
    font-size: 12px;
    border-radius: 20px;
    font-weight: 500;
    line-height: 1.6;
}
.tag-primary { background-color: var(--primary-50); color: var(--primary-700); }
.tag-success { background-color: #ecfdf5; color: #047857; }
.tag-warning { background-color: #fffbeb; color: #b45309; }
.tag-danger { background-color: #fef2f2; color: #b91c1c; }
.tag-default { background-color: var(--bg-hover); color: var(--text-secondary); }
.tag-info { background-color: #f0f9ff; color: #0369a1; }

/* ========== 分页 ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 20px;
    flex-wrap: wrap;
}
.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 10px;
    font-size: 13px;
    color: var(--text-secondary);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}
.page-btn:hover:not(.disabled):not(.active) {
    color: var(--primary-600);
    border-color: var(--primary-400);
    background-color: var(--primary-50);
}
.page-btn.active {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: #fff;
    border-color: var(--primary-600);
    font-weight: 500;
}
.page-btn.disabled { opacity: 0.4; cursor: not-allowed; }
.page-ellipsis { padding: 0 4px; color: var(--text-muted); }

/* ========== 提示框 ========== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 13px;
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}
.alert-success { background-color: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.alert-warning { background-color: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-danger { background-color: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-info { background-color: #f0f9ff; border-color: #bae6fd; color: #075985; }

/* ========== 面包屑 ========== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary-600); }
.breadcrumb .separator { color: var(--text-muted); }
.breadcrumb .current { color: var(--text-primary); font-weight: 500; }

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}
.empty-state .empty-text { font-size: 14px; }

/* ========== 加载 ========== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 筛选栏 ========== */
.filter-bar {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    border: 1px solid var(--border-light);
}
.filter-bar .form-control { width: auto; min-width: 160px; }

/* 操作栏 */
.action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 10px;
}
.action-bar-left, .action-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* 权限树 */
.permission-tree {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    max-height: 450px;
    overflow-y: auto;
    padding: 10px 12px;
    background: #fff;
}
.permission-tree .perm-level-0 {
    padding-left: 0 !important;
    margin-top: 10px;
}
.permission-tree .perm-level-0:first-child {
    margin-top: 0;
}
.permission-tree .perm-level-0 > .checkbox-wrapper {
    background: #f0f5ff !important;
    padding: 8px 12px !important;
    border-radius: 6px !important;
    display: flex !important;
    border-left: 3px solid var(--primary-500, #1890ff) !important;
    width: 100%;
    box-sizing: border-box;
}
.permission-tree .perm-level-0 > .checkbox-wrapper:hover {
    background: #e6f0ff !important;
}
.permission-tree .perm-level-1 {
    padding-left: 40px !important;
    position: relative;
    margin-top: 3px;
}
.permission-tree .perm-level-1::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: #d9d9d9;
}
.permission-tree .perm-level-1::after {
    content: '';
    position: absolute;
    left: 18px;
    top: 16px;
    width: 18px;
    height: 1px;
    background: #d9d9d9;
}
.permission-tree .perm-level-1:last-child::before {
    height: 16px;
}
.permission-tree .perm-level-2 {
    padding-left: 72px !important;
    position: relative;
    margin-top: 3px;
}
.permission-tree .perm-level-2::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: #d9d9d9;
}
.permission-tree .perm-level-2::after {
    content: '';
    position: absolute;
    left: 50px;
    top: 16px;
    width: 18px;
    height: 1px;
    background: #d9d9d9;
}
.permission-tree .perm-level-2:last-child::before {
    height: 16px;
}
.permission-tree .perm-item {
    padding: 4px 0;
    border-bottom: none;
}
.permission-tree .perm-item:last-child {
    border-bottom: none;
}
.permission-tree .perm-item .checkbox-wrapper {
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s;
}
.permission-tree .perm-item .checkbox-wrapper:hover {
    background: #f5f5f5;
}
.permission-tree .perm-item input[type="checkbox"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
    accent-color: var(--primary-500, #1890ff);
    flex-shrink: 0;
}
.permission-tree .perm-item input[type="checkbox"]:checked + span {
    color: var(--primary-600, #096dd9);
    font-weight: 500;
}

/* 隐藏 */
.hidden { display: none !important; }

/* 滚动条美化 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* 选中文本颜色 */
::selection {
    background-color: var(--primary-200);
    color: var(--primary-900);
}