:root{
  --bg:#f4f5f7; --card:#ffffff; --line:#e8eaee; --line-soft:#f0f2f5;
  --text:#14181d; --sub:#6b7280; --faint:#9ca3af;
  --accent:#2f6fed; --accent-soft:#eef3ff;
  --today:#fff8ed; --today-line:#f59e0b; --today-text:#b45309;
  --muted:#f8f9fb; --danger:#dc2626;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.06);
  --shadow-lg:0 4px 16px rgba(16,24,40,.08);
  --radius:14px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0d0f13; --card:#161a20; --line:#252a33; --line-soft:#1d222a;
    --text:#e8eaed; --sub:#9aa3b0; --faint:#6b7483;
    --accent:#6ba1ff; --accent-soft:#182337;
    --today:#2a2114; --today-line:#f59e0b; --today-text:#fbbf24;
    --muted:#12151a; --danger:#f87171;
    --shadow:0 1px 2px rgba(0,0,0,.3);
    --shadow-lg:0 4px 18px rgba(0,0,0,.45);
  }
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--text); min-height:100vh;
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Microsoft YaHei",sans-serif;
  padding:18px 16px calc(40px + env(safe-area-inset-bottom));
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;touch-action:manipulation}
.wrap{max-width:1200px;margin:0 auto}

/* ---------- 头部 ---------- */
header{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin-bottom:16px}
h1{font-size:21px;font-weight:680;letter-spacing:-.2px;margin-right:2px}
.meta{color:var(--sub);font-size:13px;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px}
.tag{display:inline-block;background:var(--accent-soft);color:var(--accent);
  border-radius:999px;padding:3px 11px;font-weight:650;font-size:12.5px;
  border:1px solid color-mix(in srgb, var(--accent) 18%, transparent)}
.sub-inline{color:var(--sub);font-size:12.5px}

.hdr-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.refresh{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:34px;min-width:76px;padding:0 13px;border:1px solid var(--line);background:var(--card);
  color:var(--text);border-radius:10px;cursor:pointer;font-size:13px;font-weight:650;
  transition:.15s;white-space:nowrap;
}
.refresh:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}
.refresh:active:not(:disabled){transform:scale(.96)}
.refresh:disabled{opacity:.5;cursor:not-allowed}
.refresh.ghost{background:transparent;border-color:transparent;color:var(--sub);min-width:auto}
.refresh.ghost:hover{border-color:var(--line);color:var(--text)}
.refresh .spin{display:inline-block;width:12px;height:12px;
  border:2px solid currentColor;border-right-color:transparent;border-radius:50%}
.refreshing .refresh .spin{animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.toast{
  position:fixed;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));
  transform:translateX(-50%) translateY(14px);
  background:var(--text);color:var(--bg);font-size:13px;font-weight:600;
  padding:9px 16px;border-radius:999px;box-shadow:var(--shadow-lg);
  opacity:0;pointer-events:none;transition:.22s ease;max-width:88vw;text-align:center;
  z-index:60;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.bad{background:var(--danger);color:#fff}

/* ---------- 周选择器 ---------- */
.bar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;gap:8px;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  padding:10px 0;margin:0 -16px 14px;padding-left:16px;padding-right:16px;
  border-bottom:1px solid var(--line-soft);
}
.weeks{display:flex;gap:6px;overflow-x:auto;flex:1;min-width:0;
  scrollbar-width:none;-ms-overflow-style:none;padding:2px 0;
  overscroll-behavior:contain}
.weeks::-webkit-scrollbar{display:none}
.wk{
  flex:0 0 auto;min-width:40px;height:36px;border:1px solid var(--line);
  background:var(--card);color:var(--sub);border-radius:10px;cursor:pointer;
  font-size:13.5px;font-weight:650;padding:0 10px;transition:.15s ease;position:relative;
}
.wk:hover{border-color:var(--accent);color:var(--accent)}
.wk:active{transform:scale(.94)}
.wk.on{background:var(--accent);border-color:var(--accent);color:#fff;
  box-shadow:0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent)}
.wk.now:not(.on)::after{content:"";position:absolute;left:50%;bottom:5px;
  transform:translateX(-50%);width:4px;height:4px;border-radius:50%;background:var(--today-line)}
.nav{display:flex;gap:6px;flex:0 0 auto}
.nav button{
  min-width:36px;height:36px;border:1px solid var(--line);background:var(--card);
  color:var(--text);border-radius:10px;cursor:pointer;font-size:16px;line-height:1;
  transition:.15s;padding:0 10px;
}
.nav button:hover{border-color:var(--accent);color:var(--accent)}
.nav button:active{transform:scale(.94)}
.nav button.today-btn{font-size:13px;font-weight:650}

/* ---------- 周信息条 ---------- */
.wkhead{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:13px 16px;margin-bottom:14px;display:flex;flex-wrap:wrap;
  gap:8px 12px;align-items:center;box-shadow:var(--shadow);
}
.wkhead .wtitle{font-size:15.5px;font-weight:680}
.wkhead .wrange{color:var(--sub);font-size:12.5px;font-variant-numeric:tabular-nums}
.pill{font-size:11px;padding:2px 8px;border-radius:999px;font-weight:650;white-space:nowrap}
.pill.now{background:var(--today);color:var(--today-text);border:1px solid var(--today-line)}
.pill.rest{background:var(--muted);color:var(--sub);border:1px solid var(--line)}

/* 本周实训 / 特别提示 */
.notice{
  display:flex;align-items:flex-start;gap:9px;
  background:var(--accent-soft);border:1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius:12px;padding:11px 14px;margin-bottom:12px;font-size:13px;line-height:1.5;
}
.notice .ico{flex:0 0 auto;font-size:14px;line-height:1.4}
.notice b{font-weight:700;color:var(--accent)}
.notice .nsub{color:var(--sub);font-size:12px;display:block;margin-top:3px}

/* ---------- 课程配色：按课程名映射到固定色相 ---------- */
.h0{--h:214}.h1{--h:268}.h2{--h:158}.h3{--h:24}.h4{--h:340}
.h5{--h:190}.h6{--h:42}.h7{--h:300}.h8{--h:130}.h9{--h:8}

/* ---------- 桌面网格 ---------- */
.grid{display:grid;grid-template-columns:46px repeat(5,minmax(0,1fr));
  gap:7px;grid-auto-rows:minmax(56px,auto);align-items:stretch}
.hcell{font-size:12px;color:var(--sub);display:flex;align-items:center;
  justify-content:center;font-weight:650;padding:6px 0;min-height:32px;letter-spacing:.3px}
.hcell.today{color:var(--accent);font-weight:750}
.hcell.idx{font-size:10.5px;color:var(--faint);font-weight:600;font-variant-numeric:tabular-nums}
/* 空槽只做极淡的定位参考，有课时才让卡片站出来 */
.slot{background:color-mix(in srgb, var(--muted) 42%, transparent);
  border:1px solid transparent;border-radius:10px;
  padding:5px 6px;display:flex;flex-direction:column;gap:5px;min-height:0;overflow:hidden}
.slot.today-col{background:var(--today)}
.card{
  border-radius:10px;padding:8px 10px;display:flex;flex:1 1 auto;min-height:0;
  flex-direction:column;justify-content:center;gap:3px;overflow:hidden;
  background:hsl(var(--h,214) 80% 93%);
  border-left:3px solid hsl(var(--h,214) 66% 52%);
  box-shadow:0 1px 2px rgba(16,24,40,.05);
  transition:.15s ease;
}
.card:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.card .nm{font-size:13.5px;font-weight:700;line-height:1.28;
  color:hsl(var(--h,214) 45% 24%);word-break:break-word}
.card .sub{font-size:11px;color:hsl(var(--h,214) 26% 38%);line-height:1.35;
  word-break:break-word}
.card .lbl-sec{align-self:flex-start;font-size:10px;font-weight:700;
  padding:1px 5px;border-radius:5px;letter-spacing:.2px;margin-bottom:1px;
  background:color-mix(in srgb, hsl(var(--h,214) 60% 50%) 15%, transparent);
  color:hsl(var(--h,214) 52% 36%)}

/* ---------- 移动端按天视图 ---------- */
.days{display:none}
.day{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px 13px;margin-bottom:10px;box-shadow:var(--shadow);
}
.day.is-today{border-color:var(--today-line);
  background:linear-gradient(180deg, var(--today) 0%, var(--card) 46%)}
.dhead{display:flex;align-items:center;gap:9px;margin-bottom:9px}
.dname{font-size:15px;font-weight:700;letter-spacing:.2px}
.day.is-today .dname{color:var(--today-text)}
.ddate{font-size:12px;color:var(--faint);font-variant-numeric:tabular-nums}
.dhead .pill{margin-left:auto}
.dbody{display:flex;flex-direction:column;gap:7px}
.dcard{
  display:flex;gap:10px;align-items:stretch;
  border-radius:10px;padding:9px 11px;
  background:hsl(var(--h,214) 80% 93%);
  border-left:3px solid hsl(var(--h,214) 66% 52%);
}
.dcard .dsec{
  flex:0 0 auto;font-size:11px;font-weight:700;
  color:hsl(var(--h,214) 50% 36%);min-width:52px;
  display:flex;align-items:center;
}
.dcard .dmain{flex:1;min-width:0}
.dcard .dnm{font-size:14px;font-weight:700;line-height:1.3;
  color:hsl(var(--h,214) 45% 24%);word-break:break-word}
.dcard .dmeta{font-size:11.5px;color:hsl(var(--h,214) 26% 40%);
  margin-top:3px;line-height:1.45;word-break:break-word}
.dcard .dweek{font-size:10.5px;color:hsl(var(--h,214) 32% 46%);margin-top:2px}
.no-class{font-size:12.5px;color:var(--faint);padding:2px 0}

/* 无课的天压成一行，让有课的天更突出 */
.day.minimal{padding:9px 13px;background:var(--muted);border-style:dashed;box-shadow:none}
.day.minimal .dhead{margin-bottom:0;align-items:baseline}
.day.minimal .dname{font-size:13.5px;color:var(--sub);font-weight:600}
.day.minimal .ddate{font-size:11.5px}
.day.minimal .dbody{display:none}
.day.minimal .none-tag{font-size:11.5px;color:var(--faint);margin-left:auto}

/* 整周无常规排课 */
.grid.is-empty{display:block}
.empty-week{
  background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);
  padding:30px 16px;text-align:center;color:var(--faint);font-size:13px;
}

/* ---------- 汇总 ---------- */
.plist{margin-top:26px}
.plist h2{font-size:13px;margin-bottom:10px;color:var(--sub);
  font-weight:680;letter-spacing:.6px}
.pitem{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;margin-bottom:8px;display:flex;flex-wrap:wrap;
  gap:8px 14px;align-items:center;font-size:13px;box-shadow:var(--shadow)}
.phead{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.pitem .swatch{width:9px;height:9px;border-radius:3px;flex:0 0 auto;
  background:hsl(var(--h,214) 62% 56%)}
.pitem .nm{font-weight:700;font-size:14px}
.pitem .kind{font-size:10.5px;padding:1px 8px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);font-weight:700}
.pmeta{display:flex;flex-wrap:wrap;gap:4px 6px;color:var(--sub);
  font-size:12.5px;flex:1 1 320px;min-width:0}
/* 每个时段/教师/地点独立成标签，比一串文字用点分隔易扫读 */
.pmeta span{background:color-mix(in srgb, var(--muted) 78%, transparent);
  padding:2px 8px;border-radius:6px;white-space:nowrap;
  font-variant-numeric:tabular-nums}
.pmeta .sep{display:none}

/* ---------- 状态 ---------- */
.state{
  background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);
  padding:38px 18px;text-align:center;color:var(--sub);font-size:13.5px;line-height:1.7;
}
.state .big{font-size:15px;font-weight:700;color:var(--text);margin-bottom:6px}
footer{margin-top:24px;text-align:center;color:var(--faint);font-size:11.5px;line-height:1.7}

/* ---------- 登录页 ---------- */
body.auth{display:flex;align-items:center;justify-content:center;min-height:100svh}
.auth-card{
  width:100%;max-width:340px;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:26px 22px;box-shadow:var(--shadow-lg);
}
.auth-card h1{font-size:19px;margin-bottom:4px}
.auth-card .lead{color:var(--sub);font-size:13px;margin-bottom:18px}
.field{margin-bottom:12px}
.field label{display:block;font-size:12.5px;color:var(--sub);margin-bottom:5px;font-weight:600}
.field input{
  width:100%;height:42px;padding:0 12px;border:1px solid var(--line);
  border-radius:10px;background:var(--muted);color:var(--text);
  font:15px/1 inherit;font-size:16px;
}
.field input:focus{outline:none;border-color:var(--accent);background:var(--card)}
.auth-card .submit{
  width:100%;height:42px;border:none;border-radius:10px;cursor:pointer;
  background:var(--accent);color:#fff;font-size:14.5px;font-weight:700;margin-top:6px;
  transition:.15s;touch-action:manipulation;
}
.auth-card .submit:active{transform:scale(.98)}
.auth-err{
  background:color-mix(in srgb, var(--danger) 12%, transparent);
  color:var(--danger);border-radius:9px;padding:8px 11px;font-size:12.5px;
  margin-bottom:12px;font-weight:600;
}

@media (max-width:720px){
  body{padding:14px 13px calc(36px + env(safe-area-inset-bottom))}
  h1{font-size:19px}
  /* 三块内容在窄屏上必然互相挤压，用网格定死位置：
     标题与按钮同行，学期/学生信息独占下一行 */
  header{display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center}
  h1{grid-column:1;grid-row:1}
  .hdr-actions{grid-column:2;grid-row:1;margin-left:0;justify-self:end}
  .meta{grid-column:1 / -1;grid-row:2;font-size:12.5px}
  .refresh{height:32px;min-width:70px;padding:0 10px;font-size:12.5px}
  .grid, .grid.is-empty{display:none !important}
  .days{display:block}
  .bar{margin:0 -13px 13px;padding-left:13px;padding-right:13px}
  .wk{min-width:38px;height:34px;font-size:13px;padding:0 9px}
  .nav button{min-width:34px;height:34px;padding:0 8px}
  .wkhead{padding:11px 13px;margin-bottom:11px}
  .wkhead .wrange{font-size:11.5px}
  .day{padding:11px 12px;margin-bottom:8px}
  .dcard{padding:9px 10px;gap:9px;border-left-width:4px}
  /* 窄屏上"共 22 周"没有信息价值，留着只会把 header 撑成三行 */
  .sub-inline{display:none}
  .plist{margin-top:16px}
  .pitem{flex-direction:column;align-items:stretch;gap:7px;padding:11px 12px}
  /* 标签横向流动，别各占一行把页面拉太长 */
  .pmeta{flex-direction:row;flex-wrap:wrap;gap:4px;flex:none}
}
@media (max-width:380px){
  .pitem{font-size:12.5px;padding:10px 12px}
  .dcard{padding:8px 9px;gap:8px}
  .dcard .dsec{min-width:46px;font-size:10.5px}
}

/* 深色：课程卡改深底亮字。必须在所有基础样式之后，否则被 .dcard 覆盖 */
@media (prefers-color-scheme: dark){
  .card,.dcard{background:hsl(var(--h,214) 30% 16%);
    border-left-color:hsl(var(--h,214) 58% 56%)}
  .card .nm,.dcard .dnm{color:hsl(var(--h,214) 68% 83%)}
  .card .sub,.dcard .dmeta{color:hsl(var(--h,214) 28% 61%)}
  .slot .lbl-sec,.dcard .dsec{color:hsl(var(--h,214) 50% 67%)}
  .dcard .dweek{color:hsl(var(--h,214) 26% 50%)}
  .pitem .swatch{background:hsl(var(--h,214) 58% 58%)}
  .day.is-today{background:linear-gradient(180deg, var(--today) 0%, var(--card) 46%)}
}

@media print{
  body{background:#fff;padding:0;color:#000}
  .bar,.nav,footer,.hdr-actions,.toast{display:none}
  .days{display:none}
  .grid{display:grid !important}
  .card,.dcard{background:#f4f7ff !important}
  .slot{background:#fafafa}
  .day,.wkhead,.pitem{box-shadow:none;break-inside:avoid}
}