/* ============================================================
   buke Design System v2 ——「深空观测站」
   深空底 · 极光渐变 · 全毛玻璃 · 分层厚重阴影 · 角色主题化
   组件词汇表与 v1 兼容: card/pill/sig/btn/kpi/q-item/opt
   ============================================================ */

:root {
  /* ── 底色 ── */
  --bg: #0a0f1e;
  --bg-2: #0d1428;

  /* ── 玻璃面 ── */
  --glass: rgba(148, 163, 208, 0.055);
  --glass-2: rgba(148, 163, 208, 0.09);
  --glass-border: rgba(148, 163, 208, 0.16);
  --glass-hi: rgba(255, 255, 255, 0.07);

  /* ── 墨色 ── */
  --ink: #eef1fa;
  --ink-2: #aab4cf;
  --ink-3: #7d88a6;
  --ink-4: #525d7a;

  /* ── 主色(随角色覆写) ── */
  --primary: #818cf8;
  --primary-2: #6366f1;
  --accent: #22d3ee;

  /* ── 语义色 ── */
  --green: #34d399;
  --green-deep: #059669;
  --amber: #fbbf24;
  --red: #fb7185;
  --violet: #a78bfa;
  --gold: #ffd700;
  --cyan: #22d3ee;

  /* ── 线与圆角 ── */
  --line: rgba(148, 163, 208, 0.14);
  --r-lg: 22px;
  --r-md: 16px;
  --r-sm: 11px;

  /* ── 阴影(分层厚重) ── */
  --shadow-1: 0 1px 0 rgba(255,255,255,.05) inset, 0 10px 30px -8px rgba(2,6,23,.55);
  --shadow-2: 0 1px 0 rgba(255,255,255,.07) inset, 0 18px 50px -12px rgba(2,6,23,.7);
  --shadow-pop: 0 24px 70px -18px rgba(2,6,23,.85);

  --blur: 22px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --base: 180ms var(--ease);
  --font: -apple-system, "PingFang SC", "MiSans", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
}

/* ── 角色主题 ── */
body[data-role="teacher"] { --primary:#8b93f8; --primary-2:#6366f1; }
body[data-role="parent"]  { --primary:#f0b544; --primary-2:#d97706; --accent:#34d399; }
body[data-role="student"] { --primary:#2dd4bf; --primary-2:#0ea5e9; --accent:#a78bfa; }
body[data-role="school"]  { --primary:#94a3b8; --primary-2:#64748b; }

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── 极光底幕(固定,不随滚动) ── */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(99,102,241,.20), transparent 60%),
    radial-gradient(900px 560px at 88% -12%, rgba(34,211,238,.13), transparent 62%),
    radial-gradient(1000px 700px at 55% 118%, rgba(167,139,250,.14), transparent 62%),
    linear-gradient(180deg, #0c1224 0%, #0a0f1e 46%, #090d19 100%);
}
/* 细噪点,压住渐变带状感 */
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============ 布局 ============ */
.wrap { max-width: 1240px; margin: 0 auto; padding: 26px 28px 60px; }

/* ============ 顶部导航(悬浮玻璃舱) ============ */
.nav {
  position: sticky; top: 12px; z-index: 50;
  margin: 12px auto 4px; max-width: 1240px;
  padding: 0 16px;
}
.nav-inner {
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
  padding: 9px 12px;
  border-radius: 18px;
  background: rgba(13, 19, 38, 0.62);
  backdrop-filter: blur(var(--blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(150%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-1);
}
.brand {
  font-weight: 800; letter-spacing: -.02em;
  margin-right: 12px; padding: 5px 12px;
  font-size: 15px; white-space: nowrap;
  background: linear-gradient(100deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tab {
  border: 1px solid transparent; background: none; cursor: pointer;
  padding: 7px 13px; border-radius: 11px;
  color: var(--ink-2); font-size: 13.5px; font-weight: 500; font-family: var(--font);
  transition: all var(--base);
  white-space: nowrap;
}
.tab:hover { color: var(--ink); background: var(--glass-2); }
.tab.on {
  color: #fff;
  background: linear-gradient(120deg, var(--primary-2), var(--primary));
  border-color: rgba(255,255,255,.16);
  box-shadow: 0 6px 18px -6px rgba(99,102,241,.55),
              0 1px 0 rgba(255,255,255,.2) inset;
}
.nav-user { margin-left: auto; display: flex; align-items: center; gap: 8px; }

/* ============ 玻璃卡片 ============ */
.card {
  position: relative;
  background: linear-gradient(165deg, var(--glass-hi), var(--glass) 42%);
  backdrop-filter: blur(var(--blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(140%);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--base), transform var(--base);
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.16), transparent);
  pointer-events: none;
}
.card.hoverable:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }

.card h3 {
  margin: 0 0 12px; font-size: 15.5px; font-weight: 700; letter-spacing: -.01em;
  display: flex; align-items: center; gap: 8px;
}
.card h3::before {
  content: ""; width: 4px; height: 15px; border-radius: 4px; flex-shrink: 0;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}
h4.mut, .h-mut { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }

/* ============ 栅格 ============ */
.grid { display: grid; gap: 14px; }
.g4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.g2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }

/* ============ KPI(渐变大数字) ============ */
.kpi {
  text-align: left; padding: 16px 18px;
  border-radius: var(--r-md);
  background: linear-gradient(165deg, var(--glass-hi), var(--glass) 55%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-1);
  position: relative; overflow: hidden;
}
.kpi::after {
  content: ""; position: absolute; right: -30px; top: -30px; width: 110px; height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(129,140,248,.16), transparent 70%);
  pointer-events: none;
}
.kpi b {
  display: block; font-size: 33px; font-weight: 800; line-height: 1.12;
  letter-spacing: -.03em; font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, #fff, #b9c2ff 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.kpi span { color: var(--ink-3); font-size: 12px; letter-spacing: .04em; }

/* ============ 信号条 ============ */
.sig {
  position: relative; overflow: hidden;
  border-radius: var(--r-sm);
  background: rgba(251, 191, 36, .07);
  border: 1px solid rgba(251, 191, 36, .18);
  padding: 10px 14px 10px 18px; margin: 0 0 10px;
  font-size: 13px; color: var(--ink-2);
}
.sig::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--amber); box-shadow: 0 0 12px var(--amber);
}
.sig.red {
  background: rgba(251, 113, 133, .07); border-color: rgba(251, 113, 133, .2);
}
.sig.red::before { background: var(--red); box-shadow: 0 0 12px var(--red); }

/* ============ 徽章 pill ============ */
.pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .02em;
  border: 1px solid transparent; white-space: nowrap;
}
.p-weak  { background: rgba(251,113,133,.12); color: var(--red);    border-color: rgba(251,113,133,.25); }
.p-mid   { background: rgba(251,191,36,.10);  color: var(--amber);  border-color: rgba(251,191,36,.25); }
.p-strong{ background: rgba(52,211,153,.10);  color: var(--green);  border-color: rgba(52,211,153,.25); }
.p-on    { background: rgba(129,140,248,.12); color: var(--primary);border-color: rgba(129,140,248,.28); }
.p-done  { background: rgba(52,211,153,.10);  color: var(--green);  border-color: rgba(52,211,153,.25); }

/* ============ 按钮 ============ */
.btn {
  border: 1px solid transparent; border-radius: var(--r-sm); cursor: pointer;
  padding: 8px 16px; font-size: 13px; font-weight: 600; font-family: var(--font);
  background: linear-gradient(120deg, #4f46e5, #6366f1);
  color: #fff;
  box-shadow: 0 6px 16px -6px rgba(79,70,229,.75),
              0 1px 0 rgba(255,255,255,.18) inset;
  transition: all var(--base);
}
.btn:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; filter: none; }
.btn.green { background: linear-gradient(120deg, #059669, #34d399); box-shadow: 0 6px 16px -6px rgba(5,150,105,.7); }
.btn.red   { background: linear-gradient(120deg, #e11d48, #fb7185); box-shadow: 0 6px 16px -6px rgba(225,29,72,.6); }
.btn.gray {
  background: var(--glass-2); color: var(--ink);
  border: 1px solid var(--glass-border); box-shadow: none;
}
.btn.gray:hover { background: var(--glass); border-color: var(--ink-4); }
.btn.small { padding: 4px 10px; font-size: 12px; }

/* ============ 表格 ============ */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 8px 10px; text-align: left; border-bottom: 1px solid rgba(148,163,208,.09); }
th {
  color: var(--ink-4); font-weight: 600; font-size: 11.5px;
  letter-spacing: .07em; text-transform: uppercase;
  border-bottom: 1px solid var(--glass-border);
}
tr:hover td { background: rgba(148,163,208,.045); }

/* ============ 表单 ============ */
input, select, textarea {
  border: 1px solid var(--glass-border); border-radius: var(--r-sm);
  padding: 9px 13px; font-size: 13.5px; font-family: var(--font);
  background: rgba(10, 15, 30, 0.55); color: var(--ink);
  transition: all var(--base); outline: none;
}
input:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(129,140,248,.18);
}
input::placeholder { color: var(--ink-4); }
select option { background: #131a30; color: var(--ink); }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.mut { color: var(--ink-3); font-size: 12px; }

/* ============ 题目条目 ============ */
.q-item {
  border: 1px solid var(--glass-border); border-radius: var(--r-md);
  padding: 14px 16px; margin: 10px 0;
  background: linear-gradient(165deg, rgba(148,163,208,.05), rgba(148,163,208,.02));
  transition: border-color var(--base), background var(--base);
}
.q-item:hover { border-color: rgba(148,163,208,.28); background: var(--glass); }

/* 作答选项 */
.opt {
  display: block; margin: 8px 0; padding: 11px 15px;
  border: 1px solid var(--glass-border); border-radius: var(--r-sm);
  cursor: pointer; transition: all var(--base);
  background: rgba(148,163,208,.035);
}
.opt:hover { border-color: var(--primary); background: var(--glass); }
.opt.on {
  border-color: var(--primary);
  background: linear-gradient(120deg, rgba(99,102,241,.20), rgba(129,140,248,.12));
  box-shadow: 0 0 0 3px rgba(129,140,248,.14);
}
.opt.correct { border-color: var(--green); background: rgba(52,211,153,.10); }
.opt.wrong   { border-color: var(--red);   background: rgba(251,113,133,.10); }

/* ============ 图表 ============ */
.chart-box, .chart { width: 100%; height: 280px; margin: 8px 0; }
.gx-map { width: 100%; height: 520px; }

/* ============ 空状态 ============ */
.empty { text-align: center; padding: 34px 16px; color: var(--ink-4); font-size: 13px; }

/* ============ 登录页 ============ */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card {
  width: 400px; padding: 40px 38px 32px;
  border-radius: 26px;
  background: linear-gradient(165deg, rgba(148,163,208,.10), rgba(148,163,208,.04) 55%);
  backdrop-filter: blur(28px) saturate(150%);
  -webkit-backdrop-filter: blur(28px) saturate(150%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-pop);
}
.login-logo {
  width: 54px; height: 54px; margin: 0 auto 16px; border-radius: 16px;
  background: linear-gradient(135deg, #6366f1, #22d3ee);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  box-shadow: 0 14px 34px -10px rgba(99,102,241,.8);
}
.login-title { text-align: center; font-size: 19px; font-weight: 800; letter-spacing: -.02em; margin: 0 0 4px; }
.login-sub { text-align: center; color: var(--ink-3); font-size: 12px; margin-bottom: 26px; }
.input-group { margin-bottom: 15px; }
.input-group label { display: block; font-size: 12px; font-weight: 600; color: var(--ink-3); margin-bottom: 6px; letter-spacing: .05em; }
.input-group input { width: 100%; padding: 11px 14px; font-size: 14px; background: rgba(8, 12, 26, 0.6); }
.login-btn {
  width: 100%; padding: 12px; margin-top: 6px;
  border: none; border-radius: var(--r-sm); cursor: pointer;
  background: linear-gradient(120deg, #4f46e5, #6366f1);
  color: #fff; font-size: 14.5px; font-weight: 700; font-family: var(--font); letter-spacing: .06em;
  box-shadow: 0 12px 30px -8px rgba(79,70,229,.85);
  transition: all var(--base);
}
.login-btn:hover { filter: brightness(1.12); transform: translateY(-1px); }
.login-btn:active { transform: scale(.98); }
.login-hint { margin-top: 16px; text-align: center; color: var(--ink-4); font-size: 11.5px; line-height: 1.7; }

/* ============ 页面标题区 ============ */
.page-head { display: flex; align-items: baseline; gap: 14px; margin: 6px 0 18px; flex-wrap: wrap; }
.page-title { font-size: 22px; font-weight: 800; letter-spacing: -.03em; margin: 0; }
.page-sub { color: var(--ink-3); font-size: 12.5px; }

/* ============ 大数字 ============ */
.big {
  font-size: 36px; font-weight: 800; text-align: center; letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, #fff, #b9c2ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============ 滚动条 ============ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: rgba(148,163,208,.18); border-radius: 8px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: rgba(148,163,208,.3); }

/* ============ 响应式 ============ */
@media (max-width: 760px) {
  .wrap { padding: 16px 14px 50px; }
  .nav { top: 8px; padding: 0 8px; }
  .kpi b { font-size: 27px; }
  .card { padding: 16px; }
}

/* ============ 打印(白底黑字) ============ */
@media print {
  body { background: #fff; color: #000; }
  body::before, body::after, .nav { display: none; }
  .card { background: #fff; border: 1px solid #ccc; box-shadow: none; backdrop-filter: none; }
  .kpi b, .big { color: #000; background: none; }
  th, td { border-color: #ddd; }
}