:root{--bg:#f6f4ef;--card:#fff;--ink:#1d2430;--muted:#6b7280;--line:#e2ddd3;--brand:#1f3a5f;--accent:#b4541a;--ok:#2f7d4f;--bad:#b3261e;--warn:#a86b00}
@media (prefers-color-scheme:dark){:root{--bg:#14171c;--card:#1d2128;--ink:#e8e6e1;--muted:#9aa3af;--line:#2c323c;--brand:#8fb4e3;--accent:#e59a62;--ok:#6cc08b;--bad:#f08a80;--warn:#e0b050}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;-webkit-text-size-adjust:100%}
.top{position:sticky;top:0;z-index:5;display:flex;gap:12px;align-items:center;padding:10px 16px;padding-top:max(10px,env(safe-area-inset-top));background:var(--card);border-bottom:1px solid var(--line)}
.top .muted{margin-left:auto;font-size:13px}
.menu{display:none}
nav{position:fixed;top:52px;bottom:0;left:0;width:200px;overflow:auto;padding:12px 8px;border-right:1px solid var(--line);background:var(--card)}
nav a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:15px}
nav a.on{background:var(--brand);color:var(--card)}
nav a .badge{float:right}
main{margin-left:200px;padding:20px 24px 80px;max-width:980px}
@media (max-width:820px){
  .menu{display:block}
  nav{transform:translateX(-100%);transition:transform .2s;z-index:6;box-shadow:0 0 24px #0004}
  nav.open{transform:none}
  main{margin-left:0;padding:16px 16px 80px}
}
h1{font-size:24px;margin:0 0 4px}
h2{font-size:18px;margin:24px 0 8px}
p{margin:6px 0}
.muted{color:var(--muted)}
.small{font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0}
.grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.stat b{display:block;font-size:26px;color:var(--brand)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.row.between{justify-content:space-between}
button,.btn{font:inherit;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer;text-decoration:none;display:inline-block}
button.primary,.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--card)}
button.ghost{border-color:transparent;padding:4px 8px;color:var(--muted)}
button:disabled{opacity:.5}
input,select,textarea{font:inherit;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--ink);max-width:100%}
textarea{width:100%;min-height:90px}
input[type=text],input[type=url],input[type=email],input[type=search]{min-width:180px;flex:1}
label{font-size:14px;color:var(--muted);display:block;margin-top:8px}
.badge{display:inline-block;padding:1px 8px;border-radius:99px;font-size:12px;background:var(--line);color:var(--ink)}
.badge.bad{background:var(--bad);color:#fff}.badge.ok{background:var(--ok);color:#fff}.badge.warn{background:var(--warn);color:#fff}
.q{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.q:last-child{border-bottom:0}
.q a{color:var(--ink);text-decoration:none;font-weight:600}
.q .meta{font-size:13px;color:var(--muted)}
.q input[type=checkbox]{margin-top:6px;width:18px;height:18px}
.rate{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.rate button{padding:12px 4px}
.timer{font-variant-numeric:tabular-nums;font-size:28px;font-weight:700;color:var(--brand)}
.bar{height:10px;border-radius:5px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;background:var(--brand)}
table{border-collapse:collapse;width:100%;font-size:14px}
td,th{padding:6px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.scroll{overflow-x:auto}
a{color:var(--brand)}
.notice{border-left:4px solid var(--accent);padding:8px 12px;background:var(--card);border-radius:0 8px 8px 0;margin:10px 0}
ol,ul{padding-left:22px;margin:6px 0}
#print{display:none}

/* ---------- 列印 / 匯出 PDF 給 GoodNotes ---------- */
@page{size:A4;margin:14mm}
@media print{
  body{background:#fff;color:#000}
  .top,nav,main{display:none!important}
  #print{display:block;font-size:12pt;line-height:1.5}
  #print h1{font-size:16pt;border-bottom:2px solid #000;padding-bottom:4px}
  #print .pq{break-inside:avoid;margin:0 0 6mm}
  #print .pq h3{font-size:12pt;margin:0 0 2mm}
  #print .pmeta{font-size:9pt;color:#444}
  #print .area{margin-top:3mm;border:1px solid #999}
  #print .area.lined{background:repeating-linear-gradient(#fff 0,#fff 8.6mm,#bbb 8.6mm,#bbb 9mm)}
  #print .area.grid{background-image:linear-gradient(#ccc .3mm,transparent .3mm),linear-gradient(90deg,#ccc .3mm,transparent .3mm);background-size:5mm 5mm}
  #print .area,#print .pq{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  #print .newpage{break-before:page}
  #print .ans{font-size:10.5pt;border-left:3px solid #000;padding-left:3mm;margin-top:2mm}
}