/* ==========================================================================
   师砚伴 — 教育 · 科技感 浅色主题
   覆盖 Tabler 1.4 / Bootstrap 5.3。仅亮色，不提供暗色。
   加载顺序：置于 tabler*.min.css 之后、各页 <style> 之前。
   ========================================================================== */

html { color-scheme: light; }

:root {
    /* 品牌 */
    --edu-brand-1: #2563eb;          /* 主蓝 */
    --edu-brand-2: #06b6d4;          /* 科技青 */
    --edu-brand-3: #6366f1;          /* 靛紫 */
    --edu-grad: linear-gradient(120deg, #2563eb 0%, #3b82f6 45%, #06b6d4 100%);
    --edu-grad-soft: linear-gradient(120deg, rgba(37, 99, 235, .12), rgba(6, 182, 212, .14));

    /* 底板 */
    --edu-bg: #f2f6fd;
    --edu-surface: #ffffff;
    --edu-line: #e3ebf8;
    --edu-ink: #0f172a;
    --edu-muted: #64748b;

    /* 形状 */
    --edu-radius: 16px;
    --edu-radius-sm: 12px;
    --edu-radius-xs: 10px;
    --edu-shadow-1: 0 1px 2px rgba(15, 23, 42, .04), 0 10px 26px -18px rgba(37, 99, 235, .45);
    --edu-shadow-2: 0 4px 14px rgba(15, 23, 42, .06), 0 26px 52px -30px rgba(37, 99, 235, .55);
    --edu-ring: 0 0 0 4px rgba(37, 99, 235, .12);

    /* —— 覆盖 Tabler 设计令牌 —— */
    --tblr-font-sans-serif: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --tblr-primary: #2563eb;
    --tblr-primary-rgb: 37, 99, 235;
    --tblr-blue: #2563eb;
    --tblr-blue-rgb: 37, 99, 235;
    --tblr-link-color: #2563eb;
    --tblr-link-hover-color: #1d4ed8;
    --tblr-body-bg: #f2f6fd;
    --tblr-body-color: #0f172a;
    --tblr-border-color: #e3ebf8;
    --tblr-border-radius: 12px;
    --tblr-border-radius-sm: 10px;
    --tblr-border-radius-lg: 16px;
}

body {
    font-family: var(--tblr-font-sans-serif);
    -webkit-font-smoothing: antialiased;
}

/* ============================ 页面底板 ============================ */

/* 仅作用于桌面端外壳（.page），不动学生端 / 学习页各自的背景 */
.page {
    background-color: var(--edu-bg);
    background-image:
        radial-gradient(circle at 12% -6%, rgba(37, 99, 235, .13), transparent 55%),
        radial-gradient(circle at 92% 0%, rgba(6, 182, 212, .15), transparent 52%),
        radial-gradient(circle at 50% 112%, rgba(99, 102, 241, .10), transparent 58%),
        radial-gradient(rgba(37, 99, 235, .07) 1px, transparent 1px);
    background-size: auto, auto, auto, 22px 22px;
    background-attachment: fixed;
}

/* ============================ 侧边栏 ============================ */

.navbar-vertical {
    background: rgba(255, 255, 255, .9);
    -webkit-backdrop-filter: blur(10px) saturate(1.15);
    backdrop-filter: blur(10px) saturate(1.15);
    border-right: 1px solid var(--edu-line);
    box-shadow: none;
}

.navbar-vertical .navbar-brand .fs-2,
.navbar-vertical .navbar-brand .navbar-brand-autodark {
    background: var(--edu-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent !important;
    letter-spacing: -.02em;
}

.navbar-vertical .nav-link {
    position: relative; /* 让右上角徽标以本行为锚点，避免溢出到侧栏外侧 */
    margin: 2px 10px;
    padding: 9px 12px;
    border-radius: var(--edu-radius-xs);
    color: #3b4a63;
    font-weight: 500;
    transition: background .18s ease, color .18s ease, box-shadow .18s ease;
}

.navbar-vertical .nav-link:hover {
    background: rgba(37, 99, 235, .08);
    color: var(--edu-brand-1);
}

.navbar-vertical .nav-link.active {
    background: var(--edu-grad);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 12px 24px -16px rgba(37, 99, 235, .95);
}

.navbar-vertical .nav-link.active .nav-link-icon,
.navbar-vertical .nav-link.active i {
    color: #fff;
}

/* Tabler 默认把侧栏 badge 当成头像角标（绝对定位 + 位移），本项目用作数量徽标，改回行内右对齐 */
.navbar-vertical .navbar-nav .nav-link .badge {
    position: static;
    transform: none;
    top: auto;
    right: auto;
}

/* 让数量徽标贴到侧栏条目右侧 */
.navbar-vertical .navbar-nav .nav-link .nav-link-title {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    gap: 6px;
}

.navbar-vertical .navbar-nav .nav-link .nav-link-title .badge {
    margin-left: auto;
}

/* ============================ 卡片 ============================ */

.card {
    border: 1px solid var(--edu-line);
    border-radius: var(--edu-radius);
    background: var(--edu-surface);
    box-shadow: var(--edu-shadow-1);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--edu-line);
    padding: 1rem 1.15rem;
}

.card-footer {
    background: linear-gradient(180deg, rgba(242, 246, 253, 0), rgba(242, 246, 253, .6));
    border-top: 1px solid var(--edu-line);
}

.card-title {
    font-weight: 700;
    letter-spacing: -.01em;
}

@media (hover: hover) {
    .card { transition: box-shadow .22s ease, border-color .22s ease; }
    .card:hover { box-shadow: var(--edu-shadow-2); border-color: #d7e5fb; }
}

/* 教练端主体：Tabler 的 .page-body 与 .page-header 各有 1.5rem 上边距，叠成 48px 空带 */
.layout-teacher .page-body {
    margin-top: 0.75rem;
}
.layout-teacher .page-wrapper .page-header {
    margin-top: 0;
}

/* ============================ 标题区 ============================ */

.page-header h1,
.page-header h2 {
    font-weight: 800;
    letter-spacing: -.025em;
}

.page-header h1::after,
.page-header h2::after {
    content: "";
    display: block;
    width: 46px;
    height: 4px;
    margin-top: 10px;
    border-radius: 999px;
    background: var(--edu-grad);
}

/* ============================ 按钮 ============================ */

.btn {
    border-radius: var(--edu-radius-xs);
    font-weight: 600;
    transition: transform .15s ease, box-shadow .18s ease, filter .18s ease;
}

.btn-primary {
    background-image: var(--edu-grad);
    border-color: transparent;
    box-shadow: 0 12px 22px -16px rgba(37, 99, 235, 1);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    background-image: var(--edu-grad);
    border-color: transparent;
    filter: brightness(1.07);
}

.btn-success {
    background-image: linear-gradient(120deg, #059669 0%, #10b981 100%);
    border-color: transparent;
    box-shadow: 0 12px 22px -16px rgba(5, 150, 105, 1);
}

.btn-success:hover,
.btn-success:focus,
.btn-success:active {
    background-image: linear-gradient(120deg, #059669 0%, #10b981 100%);
    border-color: transparent;
    filter: brightness(1.07);
}

.btn-outline-primary { border-color: #bfd7fb; }
.btn-outline-primary:hover { background: var(--edu-grad-soft); color: var(--edu-brand-1); border-color: #a9c9f8; }

.btn-outline-secondary { border-color: var(--edu-line); color: #50617d; background: #fff; }
.btn-outline-secondary:hover { background: #f4f8ff; border-color: #cfe0f7; color: var(--edu-brand-1); }

/* ============================ 表格 ============================ */

.table thead th {
    background: linear-gradient(180deg, #f8fbff 0%, #f2f7ff 100%);
    color: #51617d;
    font-weight: 700;
    letter-spacing: .01em;
    border-bottom: 1px solid var(--edu-line);
    white-space: nowrap;
}

.table tbody tr { transition: background .15s ease; }
.table tbody tr:hover { background: rgba(37, 99, 235, .035); }

.table > :not(caption) > * > * { border-bottom-color: var(--edu-line); }

/* ============================ 表单 ============================ */

.form-label { font-weight: 600; color: #3b4a63; }

.form-control,
.form-select,
.form-check-input {
    border-radius: var(--edu-radius-xs);
    border-color: #dbe6f7;
}

.form-control:focus,
.form-select:focus {
    border-color: #93c5fd;
    box-shadow: var(--edu-ring);
}

.form-select:focus { border-color: #93c5fd; }

.form-hint { color: var(--edu-muted); }

/* ============================ 徽标 / 提示 ============================ */

.badge {
    border-radius: 8px;
    font-weight: 600;
    letter-spacing: .01em;
}

.alert {
    border-radius: 14px;
    border-width: 1px;
    box-shadow: 0 10px 24px -22px rgba(15, 23, 42, .5);
}

/* ============================ 导航 / 下拉 / 弹窗 ============================ */

.nav-tabs { border-bottom: 1px solid var(--edu-line); }
.nav-tabs .nav-link {
    border: 0;
    border-radius: 10px 10px 0 0;
    color: #64748b;
    font-weight: 600;
}
.nav-tabs .nav-link:hover { color: var(--edu-brand-1); border-color: transparent; }
.nav-tabs .nav-link.active {
    color: var(--edu-brand-1);
    background: transparent;
    border-bottom: 2px solid var(--edu-brand-1);
}

.nav-pills .nav-link {
    border-radius: var(--edu-radius-xs);
    font-weight: 600;
    color: #50617d;
}
.nav-pills .nav-link.active { background: var(--edu-grad); box-shadow: 0 12px 24px -18px rgba(37, 99, 235, 1); }

.dropdown-menu {
    border: 1px solid var(--edu-line);
    border-radius: 14px;
    box-shadow: var(--edu-shadow-2);
    padding: 6px;
}
.dropdown-item { border-radius: 9px; }
.dropdown-item.active,
.dropdown-item:active { background: var(--edu-grad-soft); color: var(--edu-brand-1); }

.modal-content {
    border: 0;
    border-radius: 18px;
    box-shadow: var(--edu-shadow-2);
}
.modal-header { border-bottom: 1px solid var(--edu-line); }
.modal-footer { border-top: 1px solid var(--edu-line); }

.pagination { gap: 4px; }
.page-link { border-radius: 9px; border-color: var(--edu-line); color: #50617d; }
.page-item.active .page-link { background-image: var(--edu-grad); border-color: transparent; }

/* ============================ 进度 / 头像 ============================ */

.progress { border-radius: 999px; background: #eaf1fd; height: .5rem; }
.progress-bar { background-image: var(--edu-grad); }

.avatar { border-radius: var(--edu-radius-sm); }

/* ============================ 滚动条 ============================ */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border: 3px solid transparent;
    border-radius: 999px;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: #94a3b8; background-clip: content-box; }

/* ============================ 学生端（移动）微调：底部 Tab 改亮色 ============================ */

.he-tabbar {
    background: #ffffff !important;
    border-top: 1px solid var(--edu-line);
    box-shadow: 0 -8px 26px -18px rgba(15, 23, 42, .55) !important;
}
.he-tab { color: #64748b !important; }
.he-tab i { color: inherit; }
.he-tab:hover { background: rgba(37, 99, 235, .08) !important; color: var(--edu-brand-1) !important; }
.he-tab.active {
    background: var(--edu-grad-soft) !important;
    color: var(--edu-brand-1) !important;
    font-weight: 600;
}

/* ============================ 选择器（btn-check）============================ */

/* Tabler 默认把选中的 outline-secondary 染成深灰，浅色主题下改为品牌浅蓝选中态 */
.btn-check:checked + .btn-outline-secondary,
.btn-check:active + .btn-outline-secondary,
.btn-outline-secondary.active,
.btn-outline-secondary:active {
    background: #eaf2ff;
    border-color: #bfd7fb;
    color: var(--edu-brand-1);
    box-shadow: none;
}

.btn-check:checked + .btn-outline-primary {
    background: var(--edu-grad);
    border-color: transparent;
}

/* ============================ 玻璃层次（2026-09-15） ============================ */
/*
   只在「浮在页面上的一层」用玻璃：卡片、模态、下拉、气泡、通知、抽屉。
   刻意不做玻璃的地方：
   - 密集列表行 / 表格（<tr>、.list-group-item、.word-row-item）：backdrop-filter 是「每个元素一次离屏模糊」，
     前测那种 800+ 行铺上去会直接卡死（本轮刚修完同类问题）；
   - 按钮：尺寸太小，模糊肉眼看不出，而且 ✓/✗ 红绿、主按钮渐变这些语义实心色必须保持清晰。
   注：玻璃要有「底」才看得出来，本主题底板是浅色渐变 + 点阵，所以卡片用的是高透明度白（.72）
   ——既有磨砂质感，又不牺牲文字对比度。
*/
:root {
    --edu-glass-bg: rgba(255, 255, 255, .72);
    --edu-glass-bg-strong: rgba(255, 255, 255, .84);
    --edu-glass-blur: blur(12px) saturate(1.5);
    --edu-glass-blur-strong: blur(18px) saturate(1.6);
    --edu-glass-line: rgba(255, 255, 255, .85);
}

/* 卡片：页面主体容器，数量少（每页 1~8 个），适合磨砂 */
.card {
    background-color: var(--edu-glass-bg);
    -webkit-backdrop-filter: var(--edu-glass-blur);
    backdrop-filter: var(--edu-glass-blur);
    border: 1px solid var(--edu-glass-line);
    box-shadow: var(--edu-shadow-1);
}

/* 浮层：模态 / 下拉 / 气泡 / 通知 / 抽屉 —— 浮在内容之上，玻璃收益最高 */
.modal-content,
.dropdown-menu,
.popover,
.toast,
.offcanvas {
    background-color: var(--edu-glass-bg-strong);
    -webkit-backdrop-filter: var(--edu-glass-blur-strong);
    backdrop-filter: var(--edu-glass-blur-strong);
    border: 1px solid var(--edu-glass-line);
    box-shadow: var(--edu-shadow-2);
}

/* ==========================================================================
   图标字重 —— 本项目已把 la-* 类名整体重指到 Tabler Icons（outline，
   单档 400 描边字形），映射与生成见 tools/icon_map.php、tools/gen_tabler_shim.php。
   Tabler 的线宽本来就比原来的 Line Awesome 饱满，正常不用再调；
   万一还想整体加重或减淡，只改 --edu-icon-stroke 一个值即可。
   ========================================================================== */
:root {
    --edu-icon-stroke: 0;   /* 0 = Tabler 原始线宽；想更重可设 0.2~0.4px */
}

.la,
.las,
[class^="la-"],
[class*=" la-"] {
    -webkit-text-stroke: var(--edu-icon-stroke) currentColor;
    paint-order: stroke fill;   /* 先描边后填充，避免字形被描边撑变模糊 */
}