/* ===========================================================
   PBL 项目制教学助手 · 设计系统
   深色科技皮肤（默认）+ 可切换浅色；所有颜色走变量
   =========================================================== */
:root{
  --bg:#070b14; --bg2:#0b1220;
  --panel:rgba(17,25,42,.72); --panel-2:rgba(12,18,32,.9);
  --line:rgba(148,163,184,.16); --line-2:rgba(148,163,184,.34);
  --ink:#e8eefb; --ink2:#b9c5d6; --dim:#7f8da3; --dim2:#5b6980;
  --accent:#38bdf8; --accent2:#0ea5e9; --accent-soft:rgba(56,189,248,.12);
  --violet:#a78bfa; --ok:#34d399; --warn:#fbbf24; --bad:#f87171;
  --r:14px; --r-sm:10px;
  --sh:0 1px 2px rgba(0,0,0,.45), 0 20px 44px -22px rgba(0,0,0,.75);
  --sh-sm:0 1px 2px rgba(0,0,0,.35);
  --rim:linear-gradient(135deg, rgba(56,189,248,.45), rgba(167,139,250,.22) 45%, transparent 72%);
  --num:linear-gradient(120deg,#eaf6ff,#8fd8ff 60%,#a78bfa);
  --btn-ink:#04121f;          /* 实心按钮文字：深色主题下背景是亮蓝，用深字 */
  --btn-ink-solid:#dbe4f0;    /* ghost/描边按钮文字：深色主题下背景是深色，必须用浅字 */
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace;
}
html[data-theme="light"]{
  --bg:#f4f7fc; --bg2:#eaf0f8;
  --panel:rgba(255,255,255,.86); --panel-2:#ffffff;
  --line:#e3e9f2; --line-2:#c7d2e0;
  --ink:#0f172a; --ink2:#334155; --dim:#64748b; --dim2:#7c8a9e;
  --accent:#2563eb; --accent2:#1d4ed8; --accent-soft:#eaf2ff;
  --violet:#7c3aed; --ok:#0f766e; --warn:#b45309; --bad:#dc2626;
  --sh:0 1px 2px rgba(15,23,42,.05), 0 14px 34px -20px rgba(15,23,42,.25);
  --sh-sm:0 1px 2px rgba(15,23,42,.06);
  --rim:linear-gradient(135deg, rgba(37,99,235,.30), rgba(124,58,237,.14) 45%, transparent 72%);
  --num:linear-gradient(120deg,#0f172a,#2563eb 70%);
  --btn-ink:#ffffff;          /* 浅色主题下实心按钮是深蓝底，用白字 */
  --btn-ink-solid:#1e293b;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;overflow:hidden;background:var(--bg);color:var(--ink);
  font:15px/1.65 system-ui,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(920px 500px at 6% -12%, rgba(56,189,248,.13), transparent 62%),
    radial-gradient(780px 430px at 102% -4%, rgba(167,139,250,.13), transparent 58%),
    linear-gradient(to right, rgba(148,163,184,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148,163,184,.055) 1px, transparent 1px);
  background-size:auto,auto,34px 34px,34px 34px;
  background-attachment:fixed;
}
html[data-theme="light"] body{
  background-image:
    radial-gradient(920px 500px at 6% -12%, rgba(37,99,235,.10), transparent 62%),
    radial-gradient(780px 430px at 102% -4%, rgba(124,58,237,.08), transparent 58%),
    linear-gradient(to right, rgba(15,23,42,.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15,23,42,.03) 1px, transparent 1px);
}
#bgCanvas{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
::selection{background:rgba(56,189,248,.32)}

/* ---------- 顶栏 ---------- */
header{
  height:58px;background:var(--panel);backdrop-filter:blur(16px) saturate(1.3);
  -webkit-backdrop-filter:blur(16px) saturate(1.3);
  border-bottom:1px solid var(--line);padding:0 20px;display:flex;align-items:center;
  gap:14px;position:relative;z-index:10;
}
header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,189,248,.55),rgba(167,139,250,.35),transparent);
  opacity:.8}
header .logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:16px;
  letter-spacing:.2px;white-space:nowrap}
header .logo img{width:28px;height:28px;display:block;
  filter:drop-shadow(0 0 10px rgba(56,189,248,.35))}
header .logo small{display:block;font-weight:400;font-size:10px;color:var(--dim2);
  letter-spacing:1.1px}
header .spacer{flex:1}
.icon-btn{background:var(--panel-2);color:var(--ink2);border:1px solid var(--line);
  border-radius:10px;width:34px;height:34px;padding:0;font-size:15px;cursor:pointer;
  box-shadow:none;transition:.18s;line-height:1}
.icon-btn:hover{color:var(--accent);border-color:var(--line-2);
  box-shadow:0 0 0 1px rgba(56,189,248,.25),0 0 16px -4px rgba(56,189,248,.5)}
.layout{display:flex;height:calc(100vh - 58px);overflow:hidden;position:relative;z-index:1}
nav{width:190px;flex:0 0 190px;background:var(--panel);backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);border-right:1px solid var(--line);
  padding:14px 10px;overflow-y:auto}
nav a{display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:var(--r-sm);
  color:var(--ink2);text-decoration:none;font-size:14px;margin-bottom:3px;cursor:pointer;
  position:relative;transition:.16s}
nav a:hover{background:rgba(148,163,184,.09);color:var(--ink)}
nav a.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
nav a.on::before{content:"";position:absolute;left:-10px;top:8px;bottom:8px;width:3px;
  border-radius:0 3px 3px 0;background:var(--accent);
  box-shadow:0 0 12px 1px rgba(56,189,248,.7)}
nav a .ico{width:18px;text-align:center;flex:0 0 18px}
main{flex:1;padding:24px 28px 60px;overflow-y:auto;max-width:1280px}

/* ---------- 面板 ---------- */
.card{position:relative;background:var(--panel);backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin-bottom:16px;
  box-shadow:var(--sh);animation:rise .4s cubic-bezier(.2,.7,.2,1) both}
.card::after{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--rim);pointer-events:none;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask-composite:exclude}
.card h3{margin:0 0 12px;font-size:14.5px;font-weight:650;color:var(--ink);
  display:flex;align-items:center;gap:9px}
.card h3::before{content:"";width:3px;height:15px;border-radius:2px;flex:0 0 3px;
  background:linear-gradient(180deg,var(--accent),var(--violet));
  box-shadow:0 0 10px rgba(56,189,248,.6)}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.card:nth-child(2){animation-delay:.04s}
.card:nth-child(3){animation-delay:.08s}
.card:nth-child(4){animation-delay:.12s}
.card:nth-child(5){animation-delay:.16s}
.card:nth-child(6){animation-delay:.2s}

/* ---------- 指标 ---------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(136px,1fr));gap:12px;
  margin-bottom:16px}
.kpi{position:relative;overflow:hidden;background:var(--panel);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--r);
  padding:14px 16px;box-shadow:var(--sh-sm);animation:rise .4s cubic-bezier(.2,.7,.2,1) both}
.kpi::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--accent),var(--violet));opacity:.85}
.kpi b{display:block;font-size:27px;line-height:1.12;font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum";letter-spacing:-.6px;
  background:var(--num);-webkit-background-clip:text;background-clip:text;color:transparent}
.kpi span{display:block;margin-top:5px;font-size:11px;color:var(--dim);letter-spacing:.6px}

/* ---------- 进度环 / 数据条 ---------- */
.rings{display:flex;gap:26px;flex-wrap:wrap;align-items:center}
.ring{position:relative;width:106px;height:106px}
.ring svg{width:106px;height:106px;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:8;stroke-linecap:round}
.ring .ring-bg{stroke:var(--line)}
.ring .ring-fg{stroke:var(--accent);filter:drop-shadow(0 0 7px rgba(56,189,248,.6));
  transition:stroke-dashoffset .9s cubic-bezier(.2,.7,.2,1)}
.ring-txt{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;text-align:center}
.ring-txt b{font-size:17px;font-variant-numeric:tabular-nums;letter-spacing:-.3px}
.ring-txt span{font-size:10px;color:var(--dim);letter-spacing:.4px;margin-top:2px}
.bars{display:flex;flex-direction:column;gap:9px}
.bar{display:flex;align-items:center;gap:10px;font-size:13px}
.bar-l{flex:0 0 86px;color:var(--ink2);overflow:hidden;text-overflow:ellipsis;
  white-space:nowrap}
.bar-t{flex:1;height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.bar-t i{display:block;height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--accent),var(--violet));
  box-shadow:0 0 12px -2px var(--accent);
  transition:width .8s cubic-bezier(.2,.7,.2,1)}
.bar-v{flex:0 0 36px;text-align:right;font-variant-numeric:tabular-nums;color:var(--dim)}

/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);
  vertical-align:top}
th{color:var(--dim);font-weight:600;font-size:10.5px;letter-spacing:.8px;
  text-transform:uppercase;background:rgba(148,163,184,.06)}
tbody tr{transition:background .15s}
tbody tr:hover td{background:rgba(56,189,248,.06)}

/* ---------- 表单 ---------- */
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);
  border-radius:var(--r-sm);font:inherit;background:var(--panel-2);color:var(--ink);
  transition:.16s}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;
  box-shadow:0 0 0 3px rgba(56,189,248,.16),0 0 18px -6px rgba(56,189,248,.6)}
input::placeholder,textarea::placeholder{color:var(--dim2)}
textarea{min-height:68px;resize:vertical}
label{display:block;font-size:11px;color:var(--dim);margin:12px 0 5px;letter-spacing:.5px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>div{flex:1 1 240px}

/* ---------- 按钮 ---------- */
button{background:linear-gradient(135deg,var(--accent2),var(--accent));color:var(--btn-ink);
  border:0;border-radius:var(--r-sm);padding:9px 16px;font:inherit;font-weight:600;
  cursor:pointer;transition:.16s;box-shadow:0 6px 20px -10px rgba(56,189,248,.9)}
button:hover{filter:brightness(1.08);box-shadow:0 8px 26px -10px rgba(56,189,248,1)}
button:active{transform:translateY(1px)}
button.ghost{background:var(--panel-2);color:var(--btn-ink-solid);border:1px solid var(--line);
  box-shadow:none;font-weight:500}
button.ghost:hover{color:var(--accent);border-color:var(--line-2);background:var(--panel-2);
  box-shadow:0 0 0 1px rgba(56,189,248,.22)}
button.sm{padding:6px 12px;font-size:13px;border-radius:8px}
button:disabled{opacity:.55;cursor:not-allowed;filter:none;box-shadow:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- 标签 / 其它 ---------- */
.tag{display:inline-flex;align-items:center;gap:5px;font-size:11px;padding:3px 9px;
  border-radius:999px;border:1px solid var(--line);color:var(--dim);
  background:rgba(148,163,184,.08);white-space:nowrap}
.tag.high{color:var(--bad);border-color:rgba(248,113,113,.4);
  background:rgba(248,113,113,.1)}
.tag.mid{color:var(--warn);border-color:rgba(251,191,36,.4);
  background:rgba(251,191,36,.1)}
.out-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(242px,1fr));gap:12px}
.out{position:relative;background:var(--panel-2);border:1px solid var(--line);
  border-radius:var(--r);padding:14px 15px;transition:.18s}
.out:hover{border-color:var(--line-2);transform:translateY(-2px);
  box-shadow:0 16px 34px -20px rgba(0,0,0,.8),0 0 0 1px rgba(56,189,248,.2)}
.out b{display:block;margin-bottom:4px;font-size:14px}
.out p{margin:0 0 10px;color:var(--dim);font-size:12.5px}
.muted{color:var(--dim);font-size:12.5px}
.bigcode{font-family:var(--mono);font-size:21px;letter-spacing:4px;font-weight:700;
  color:var(--accent);text-shadow:0 0 18px rgba(56,189,248,.55)}
.ok{color:var(--ok)} .bad{color:var(--bad)} .warn{color:var(--warn)}
.toast{position:fixed;right:22px;bottom:22px;background:var(--panel-2);color:var(--ink);
  border:1px solid var(--line-2);padding:11px 17px;border-radius:11px;opacity:0;
  transition:.28s;font-size:13.5px;box-shadow:var(--sh);pointer-events:none;max-width:60vw;
  z-index:50}
.toast.on{opacity:1;box-shadow:var(--sh),0 0 0 1px rgba(56,189,248,.3)}
pre{background:rgba(2,6,14,.75);color:#dbeafe;border:1px solid var(--line);
  padding:13px;border-radius:var(--r-sm);overflow:auto;font-family:var(--mono);
  font-size:12px;line-height:1.6}
html[data-theme="light"] pre{background:#0b1220;color:#e2e8f0}
.item{border-top:1px solid var(--line);padding:11px 0;font-size:14px}
.item:first-child{border-top:0}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:rgba(148,163,184,.4);border-radius:6px;
  border:3px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:rgba(56,189,248,.6);background-clip:content-box;
  border:3px solid transparent}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
}
@media (max-width:840px){
  nav{width:62px;flex:0 0 62px;padding:12px 8px}
  nav a{justify-content:center;padding:10px 0}
  nav a .txt{display:none}
  header .logo .txt{display:none}
  main{padding:16px 14px 44px}
}