/* 老闆找錢包 — 手機優先 */
:root {
  --ink: #1b1f24;
  --muted: #5b6672;
  --line: #dfe5ea;
  --bg: #ffffff;
  --soft: #f4f7f9;
  --navy: #0f3d5e;
  --navy-2: #134b73;
  --gold: #ffd166;
  --red: #b3261e;
  --red-bg: #fdecea;
  --green: #1d7a4f;
  --green-bg: #e8f5ee;
  --amber-bg: #fff6df;
  --radius: 12px;
  --max: 720px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", system-ui, sans-serif;
  font-size: 16px; line-height: 1.75;
}
a { color: var(--navy-2); }
img { max-width: 100%; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 8px; top: 8px; background: #fff; padding: 8px; z-index: 99; }

/* header */
.top {
  position: sticky; top: 0; z-index: 20; background: var(--navy); color: #fff;
  display: flex; align-items: center; flex-wrap: wrap; padding: 10px 16px; gap: 8px;
}
.logo { color: #fff; text-decoration: none; font-weight: 700; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.logo-mark { background: var(--gold); color: var(--navy); border-radius: 8px; width: 28px; height: 28px; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; }
.menu-btn { margin-left: auto; background: none; border: 1px solid rgba(255,255,255,.4); color: #fff; border-radius: 8px; font-size: 20px; width: 44px; height: 40px; }
.nav { display: none; width: 100%; flex-direction: column; padding-top: 6px; }
.nav.open { display: flex; }
.nav a { color: #fff; text-decoration: none; padding: 10px 4px; border-top: 1px solid rgba(255,255,255,.15); min-height: 44px; }
@media (min-width: 760px) {
  .menu-btn { display: none; }
  .nav { display: flex; flex-direction: row; width: auto; margin-left: auto; gap: 4px; padding: 0; }
  .nav a { border: 0; padding: 6px 10px; font-size: 15px; min-height: 0; }
  .nav a:hover { text-decoration: underline; }
}

/* layout */
.wrap { max-width: var(--max); margin: 0 auto; padding: 16px 16px 40px; }
h1 { font-size: 26px; line-height: 1.3; margin: 8px 0 12px; }
h2 { font-size: 20px; margin: 32px 0 10px; padding-left: 10px; border-left: 4px solid var(--gold); }
h3 { font-size: 17px; margin: 20px 0 6px; }
p { margin: 0 0 12px; }
ul, ol { padding-left: 22px; margin: 0 0 12px; }
li { margin-bottom: 4px; }
.lead { font-size: 18px; color: var(--muted); }
.note { color: var(--muted); font-size: 14px; }
.small { font-size: 14px; }
.hero { padding: 8px 0 4px; }
.hero h1 { font-size: 28px; }
.hero .lead { margin-bottom: 16px; }

/* cards */
.cards { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 12px 0; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(3, 1fr); } .cards.two { grid-template-columns: repeat(2, 1fr); } }
.card {
  display: block; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px;
  text-decoration: none; color: inherit; background: #fff; min-height: 44px;
}
.card:hover { border-color: var(--navy-2); }
.card b { display: block; font-size: 17px; color: var(--navy); margin-bottom: 2px; }
.card .sub { color: var(--muted); font-size: 14px; }

/* 六格 */
.grid6 { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 12px 0 8px; }
@media (min-width: 720px) { .grid6 { grid-template-columns: 1fr 1fr; } }
.box { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px 10px; background: #fff; }
.box h2 { margin: 0 0 8px; font-size: 18px; border: 0; padding: 0; }
.box h2 .n { display: inline-block; background: var(--navy); color: #fff; border-radius: 6px; font-size: 13px; padding: 0 7px; margin-right: 6px; vertical-align: 2px; }
.box ul { padding-left: 20px; }
.box.alert { border-color: var(--red); background: var(--red-bg); }
.box.alert h2 { color: var(--red); }
.check li { list-style: none; position: relative; padding-left: 26px; }
.check li::before { content: "✓"; position: absolute; left: 4px; color: var(--green); font-weight: 700; }

/* 數字表 */
.tbl-wrap { overflow-x: auto; margin: 8px 0 12px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--soft); font-weight: 600; white-space: nowrap; }
.num { font-weight: 700; color: var(--navy); }

/* 出處 */
.src { display: inline-block; font-size: 12px; color: var(--muted); text-decoration: none; border-bottom: 1px dotted var(--muted); margin-left: 4px; line-height: 1.4; }
.src:hover { color: var(--navy-2); }
.src-line { font-size: 12px; color: var(--muted); margin: 4px 0 0; }

/* callout */
.callout { border-left: 4px solid var(--navy); background: var(--soft); padding: 10px 14px; border-radius: 0 var(--radius) var(--radius) 0; margin: 12px 0; }
.callout.warn { border-color: var(--red); background: var(--red-bg); }
.callout.ok { border-color: var(--green); background: var(--green-bg); }
.callout.amber { border-color: #c98a00; background: var(--amber-bg); }

/* FAQ */
.faq { border-top: 1px solid var(--line); padding: 14px 0 6px; }
.faq h3 { margin: 0 0 6px; font-size: 17px; color: var(--navy); }
.faq .a p:last-child { margin-bottom: 4px; }
.faq .tag { display: inline-block; font-size: 12px; background: var(--soft); color: var(--muted); border-radius: 4px; padding: 0 6px; margin-left: 6px; vertical-align: 2px; }

/* buttons */
.btn {
  display: inline-block; min-height: 44px; line-height: 44px; padding: 0 20px; border-radius: 10px;
  background: var(--navy); color: #fff; text-decoration: none; font-weight: 600; border: 0; font-size: 16px; cursor: pointer;
}
.btn:hover { background: var(--navy-2); }
.btn.ghost { background: #fff; color: var(--navy); border: 1px solid var(--navy); }
.btn.full { display: block; width: 100%; text-align: center; }
.btn-threads { background: #000; }
.btn-threads:hover { background: #222; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0; }

/* threads cta + footer */
.threads-cta { max-width: var(--max); margin: 0 auto; padding: 0 16px 24px; text-align: center; }
.btn-row.center { justify-content: center; }
.float-nav { position: fixed; right: 12px; bottom: 16px; z-index: 30; display: flex; gap: 8px; }
.float-nav[hidden] { display: none; }
.fbtn { min-height: 44px; min-width: 44px; padding: 0 14px; border-radius: 22px; border: 1px solid var(--navy); background: rgba(255,255,255,.96); color: var(--navy); font-size: 15px; font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; box-shadow: 0 2px 8px rgba(0,0,0,.18); cursor: pointer; }
.fbtn:hover { background: var(--navy); color: #fff; }
.threads-cta p { color: var(--muted); margin-bottom: 8px; }
.foot { background: var(--soft); border-top: 1px solid var(--line); padding: 20px 16px 28px; font-size: 13px; color: var(--muted); text-align: center; }
.foot p { margin: 0 0 4px; }
.foot-links { margin-top: 10px; line-height: 2; }
.foot-brand { margin-top: 8px; }

/* forms */
form.quiz { border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; background: #fff; }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; margin-bottom: 4px; }
.field select, .field input[type=number], .field input[type=text] {
  width: 100%; min-height: 44px; font-size: 16px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.field .help { font-size: 13px; color: var(--muted); margin-top: 2px; }
.radios { display: flex; flex-wrap: wrap; gap: 8px; }
.radios label { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; min-height: 44px; display: inline-flex; align-items: center; gap: 6px; font-weight: 500; cursor: pointer; }
.radios input { margin: 0; }
.result { margin-top: 16px; }
.result .r { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; }
.result .r.yes { border-color: var(--green); background: var(--green-bg); }
.result .r.maybe { border-color: #c98a00; background: var(--amber-bg); }
.result .r.no { background: var(--soft); color: var(--muted); }
.result .r b { display: block; font-size: 17px; margin-bottom: 4px; }
.badge { display: inline-block; font-size: 12px; border-radius: 4px; padding: 0 6px; margin-left: 6px; vertical-align: 2px; }
.badge.yes { background: var(--green); color: #fff; }
.badge.maybe { background: #c98a00; color: #fff; }
.badge.no { background: var(--muted); color: #fff; }

/* calc */
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (min-width: 640px) { .calc-grid { grid-template-columns: repeat(4, 1fr); } }
.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 12px 0; }
@media (min-width: 640px) { .metrics { grid-template-columns: repeat(3, 1fr); } }
.metric { border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; background: var(--soft); }
.metric .k { font-size: 13px; color: var(--muted); }
.metric .v { font-size: 20px; font-weight: 700; color: var(--navy); }
.seg-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: end; margin-bottom: 8px; }
details { border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 14px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; min-height: 32px; line-height: 32px; }
.score { font-size: 40px; font-weight: 800; line-height: 1.1; }
.bar { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; margin: 4px 0 10px; }
.bar i { display: block; height: 100%; background: var(--navy); }
.tabs { display: flex; gap: 8px; margin: 8px 0 16px; }
.tabs button { flex: 1; min-height: 44px; border: 1px solid var(--navy); background: #fff; color: var(--navy); border-radius: 10px; font-size: 16px; font-weight: 600; cursor: pointer; }
.tabs button[aria-selected=true] { background: var(--navy); color: #fff; }
.hidden { display: none !important; }

/* glossary */
dl.gl dt { font-weight: 700; color: var(--navy); margin-top: 18px; font-size: 17px; }
dl.gl dd { margin: 4px 0 0; }

/* changelog */
.log li { margin-bottom: 10px; }
.log time { font-weight: 700; color: var(--navy); margin-right: 6px; }

.toc { font-size: 14px; color: var(--muted); margin: 0 0 12px; }
.toc a { margin-right: 10px; white-space: nowrap; }
.updated { font-size: 13px; color: var(--muted); }