/**
 * 课时云记 - 后台管理系统现代视觉同步样式
 * Version: 2.0.0
 * 优化重点：品牌色调同步、圆角与阴影微调、表格与表单质感提升、导航栏与侧边栏现代化
 */

:root {
    --admin-brand-primary: #4f46e5;
    --admin-brand-hover: #4338ca;
    --admin-brand-light: #eef2ff;
    --admin-brand-glow: rgba(79, 70, 229, 0.18);
    
    --admin-sidebar-bg: #0f172a;
    --admin-sidebar-dark: #090d16;
    --admin-sidebar-active: #1e1b4b;
    --admin-header-bg: #ffffff;
    
    --admin-border-color: #e2e8f0;
    --admin-bg-base: #f8fafc;
    --admin-text-main: #0f172a;
    --admin-text-muted: #64748b;
    
    --admin-radius-sm: 6px;
    --admin-radius-md: 10px;
    --admin-radius-lg: 16px;
}

/* 全局字体平滑与背景 */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--admin-text-main);
}

/* 顶部 Header 现代风格 */
.main-header .logo {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%) !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    border-right: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-shadow: none !important;
}

.main-header .logo .logo-lg {
    font-size: 16px;
}

.main-header .navbar {
    background: #ffffff !important;
    border-bottom: 1px solid var(--admin-border-color) !important;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.04) !important;
}

.main-header .navbar .nav > li > a {
    color: var(--admin-text-muted) !important;
    font-weight: 500;
    transition: all 0.2s ease;
}

.main-header .navbar .nav > li > a:hover,
.main-header .navbar .nav > li > a:focus,
.main-header .navbar .nav .open > a {
    background: rgba(79, 70, 229, 0.06) !important;
    color: var(--admin-brand-primary) !important;
}

/* 标签页 AddTabs 现代化 */
.nav-addtabs > li > a {
    border-radius: var(--admin-radius-sm) var(--admin-radius-sm) 0 0 !important;
    font-size: 13px !important;
    padding: 10px 15px !important;
    border: 1px solid transparent !important;
    transition: all 0.2s ease;
}

.nav-addtabs > li.active > a,
.nav-addtabs > li.active > a:hover {
    background: var(--admin-brand-light) !important;
    color: var(--admin-brand-primary) !important;
    font-weight: 600 !important;
    border-bottom: 2px solid var(--admin-brand-primary) !important;
}

.nav-addtabs li > .close-tab {
    font-size: 11px !important;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.nav-addtabs li > .close-tab:hover {
    opacity: 1;
    color: #ef4444 !important;
}

/* 左侧主侧边栏 */
.main-sidebar, .left-side {
    background-color: var(--admin-sidebar-bg) !important;
    box-shadow: 2px 0 10px rgba(15, 23, 42, 0.05);
}

.sidebar-menu > li.header {
    color: #475569 !important;
    background: transparent !important;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 12px 20px 6px !important;
}

.sidebar-menu > li > a {
    border-left: 3px solid transparent !important;
    color: #94a3b8 !important;
    font-weight: 500;
    padding: 11px 18px 11px 18px !important;
    transition: all 0.25s ease;
}

.sidebar-menu > li:hover > a,
.sidebar-menu > li.active > a {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.06) !important;
}

.sidebar-menu > li.active > a {
    border-left-color: var(--admin-brand-primary) !important;
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.22) 0%, rgba(79, 70, 229, 0.03) 100%) !important;
    color: #ffffff !important;
    font-weight: 600;
}

.sidebar-menu .treeview-menu {
    background: rgba(0, 0, 0, 0.2) !important;
    padding: 4px 0;
}

.sidebar-menu .treeview-menu > li > a {
    color: #94a3b8 !important;
    font-size: 13px;
    padding: 8px 15px 8px 30px !important;
}

.sidebar-menu .treeview-menu > li > a:hover,
.sidebar-menu .treeview-menu > li.active > a {
    color: #ffffff !important;
}

/* 面包屑导航 Ribbon */
#ribbon {
    background: #ffffff !important;
    border-bottom: 1px solid var(--admin-border-color) !important;
    padding: 10px 18px !important;
}

#ribbon .breadcrumb > li + li:before {
    color: #94a3b8;
}

#ribbon .breadcrumb > .active {
    color: var(--admin-text-main);
    font-weight: 600;
}

/* 按钮风格优化 */
.btn {
    border-radius: var(--admin-radius-sm) !important;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.btn-primary {
    background: linear-gradient(135deg, var(--admin-brand-primary) 0%, #6366f1 100%) !important;
    border-color: var(--admin-brand-primary) !important;
    color: #ffffff !important;
}

.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background: linear-gradient(135deg, var(--admin-brand-hover) 0%, var(--admin-brand-primary) 100%) !important;
    border-color: var(--admin-brand-hover) !important;
    box-shadow: 0 3px 10px var(--admin-brand-glow) !important;
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
    border-color: #059669 !important;
}

.btn-success:hover {
    box-shadow: 0 3px 10px rgba(16, 185, 129, 0.25) !important;
    transform: translateY(-1px);
}

/* 面板 Panel 与卡片 Box */
.panel, .box {
    border-radius: var(--admin-radius-md) !important;
    border: 1px solid var(--admin-border-color) !important;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02) !important;
    overflow: hidden;
}

.panel-heading, .box-header {
    border-bottom: 1px solid var(--admin-border-color) !important;
    background-color: #ffffff !important;
    padding: 14px 18px !important;
}

.panel-heading .panel-title, .box-header .box-title {
    font-weight: 700 !important;
    font-size: 15px !important;
    color: var(--admin-text-main) !important;
}

.panel-body, .box-body {
    padding: 18px !important;
    background-color: #ffffff;
}

/* 表单输入控件 */
.form-control {
    border-radius: var(--admin-radius-sm) !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    transition: all 0.2s ease;
    font-size: 13px;
    height: 36px;
}

.form-control:focus {
    border-color: var(--admin-brand-primary) !important;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12) !important;
}

.input-group-addon {
    border-color: #cbd5e1 !important;
    background-color: #f8fafc !important;
    color: #64748b !important;
    border-radius: var(--admin-radius-sm) !important;
}

/* Bootstrap Table 现代微调 */
.bootstrap-table .table {
    border-bottom: 1px solid var(--admin-border-color) !important;
}

.table > thead > tr > th {
    background-color: #f8fafc !important;
    border-bottom: 1px solid var(--admin-border-color) !important;
    color: #475569 !important;
    font-weight: 600 !important;
    font-size: 13px !important;
    padding: 11px 12px !important;
}

.table > tbody > tr > td {
    padding: 11px 12px !important;
    vertical-align: middle !important;
    font-size: 13px;
    border-top: 1px solid #f1f5f9 !important;
}

.table-striped > tbody > tr:nth-of-type(odd) {
    background-color: #fafcff;
}

.table-hover > tbody > tr:hover {
    background-color: #f1f5f9 !important;
}

/* 分页控件 */
.pagination > li > a, .pagination > li > span {
    border-radius: var(--admin-radius-sm) !important;
    margin: 0 2px;
    border-color: var(--admin-border-color) !important;
    color: var(--admin-text-muted) !important;
}

.pagination > .active > a, .pagination > .active > a:hover {
    background-color: var(--admin-brand-primary) !important;
    border-color: var(--admin-brand-primary) !important;
    color: #ffffff !important;
    box-shadow: 0 2px 6px var(--admin-brand-glow);
}

/* ==========================================================================
   SelectPage 下拉选择控件现代化视觉与交互强化 (彻底告别“普通文本输入框”困惑)
   ========================================================================== */

/* 1. 容器与单选输入框 */
.sp_container {
    vertical-align: middle;
    display: block !important;
    width: 100% !important;
    position: relative;
}

.sp_container > .sp_input {
    cursor: pointer !important;
    background-color: #ffffff !important;
    padding-right: 38px !important;
    border-radius: 4px !important;
    border: 1px solid #d1d5db !important;
    height: 34px !important;
    line-height: 1.42857143 !important;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05) !important;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out, background-color 0.15s ease-in-out !important;
}

.sp_container:hover > .sp_input {
    border-color: #10b981 !important;
    background-color: #fbfdfc !important;
}

.sp_container.sp_container_open > .sp_input,
.sp_container > .sp_input:focus {
    border-color: #10b981 !important;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.18) !important;
    background-color: #ffffff !important;
}

/* 2. 独立、醒目的右侧下拉触发按钮 */
.sp_container > .sp_button {
    width: 34px !important;
    height: 32px !important;
    top: 1px !important;
    right: 1px !important;
    background-color: #f8fafc !important;
    border: none !important;
    border-left: 1px solid #e2e8f0 !important;
    border-top-right-radius: 3px !important;
    border-bottom-right-radius: 3px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: all 0.15s ease !important;
    z-index: 3 !important;
    padding: 0 !important;
}

.sp_container:hover > .sp_button,
.sp_container.sp_container_open > .sp_button {
    background-color: #e2e8f0 !important;
}

/* 3. 增强版清晰下三角（带展开 180° 翻转动效） */
.sp_container > .sp_button span.sp_caret {
    position: static !important;
    margin: 0 !important;
    display: inline-block !important;
    width: 0 !important;
    height: 0 !important;
    vertical-align: middle !important;
    border-top: 5px solid #475569 !important;
    border-right: 4.5px solid transparent !important;
    border-left: 4.5px solid transparent !important;
    border-bottom: 0 !important;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), border-top-color 0.2s ease !important;
}

.sp_container:hover > .sp_button span.sp_caret {
    border-top-color: #0f172a !important;
}

.sp_container.sp_container_open > .sp_button span.sp_caret {
    transform: rotate(180deg) !important;
    border-top-color: #059669 !important;
}

/* 4. 清除按钮位置与层级优化 */
.sp_container > .sp_clear_btn {
    right: 40px !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    height: auto !important;
    padding: 0 !important;
    line-height: 1 !important;
    color: #94a3b8 !important;
    z-index: 4 !important;
    cursor: pointer !important;
    font-size: 16px !important;
}

.sp_container > .sp_clear_btn:hover {
    color: #ef4444 !important;
}

/* 5. 多选模式特殊保护（如学员选择标签模式） */
.sp_container .sp_element_box {
    border-radius: 4px !important;
    border: 1px solid #d1d5db !important;
    min-height: 34px !important;
    padding-right: 36px !important;
    background-color: #ffffff !important;
    cursor: pointer !important;
    transition: border-color 0.15s ease-in-out !important;
}
.sp_container:hover .sp_element_box {
    border-color: #10b981 !important;
}
.sp_container .sp_element_box input.sp_input,
.sp_container .sp_element_box input.selectpage {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    height: auto !important;
    padding: 2px 6px !important;
    cursor: text !important;
}

/* 6. 下拉候选列表浮层美化 */
.sp_result_area {
    border-radius: 6px !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.08) !important;
    overflow: hidden !important;
    z-index: 99999999 !important;
}

/* 7. 左侧菜单栏底部机构专属码样式 & 迷你侧边栏折叠隐藏 */
.sidebar-collapse .sidebar-studio-qrcode {
    display: none !important;
}