/* aie-worlds-fair-2026 —— 版型 G「路線圖」(照 roadmap.sh 的 AI Engineer 路線圖)
 * 白底、螢光黃節點配黑框、米色子節點、藍色虛線主幹。整站只有這三個顏色在做事:
 * 黃 = 節點(點了開抽屜),米 = 一場演講(點了進那一場),藍 = 主幹與進度。 */

:root {
  --bg: #FFFFFF;
  --ink: #16161A;
  --mute: #5B5B66;
  --rule: #E4E4E0;
  --card: #F6F6F3;
  --line: #2B78E4;
  --node: #FDFF00;
  --node-ink: #000000;
  --node-b: #000000;
  --sub: #FFE599;
  --sub-b: #1C1A10;
  --sub-ink: #1C1A10;
  --done: #D6E6FB;
  --doing: #C77700;
  --off-bg: #F7F7F5;
  --scrim: rgba(0, 0, 0, .35);
  --en: "Balsamiq Sans", "Noto Sans TC", system-ui, sans-serif;
  --zh: "Noto Sans TC", system-ui, -apple-system, "PingFang TC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16161A; --ink: #ECECEF; --mute: #A2A2AD; --rule: #2E2E36; --card: #1F1F25;
    --line: #6FA6F2; --node: #E8E800; --sub: #3B3420; --sub-b: #A08B45; --sub-ink: #F4E8BE;
    --done: #1E3354; --doing: #F0A63A; --off-bg: #1C1C22; --scrim: rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #16161A; --ink: #ECECEF; --mute: #A2A2AD; --rule: #2E2E36; --card: #1F1F25;
  --line: #6FA6F2; --node: #E8E800; --sub: #3B3420; --sub-b: #A08B45; --sub-ink: #F4E8BE;
  --done: #1E3354; --doing: #F0A63A; --off-bg: #1C1C22; --scrim: rgba(0, 0, 0, .6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.7 var(--zh); overflow-wrap: anywhere;
}
body.has-drawer { overflow: hidden; }
a { color: inherit; }
h1, h2, h3, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
button, select, input { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--line); outline-offset: 2px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.lede { color: var(--mute); margin-top: 10px; }
.lede b { color: var(--ink); }

/* ── 站頭站尾 ── */
.top { background: #000; color: #FFF; }
.topin { max-width: 980px; margin: 0 auto; padding: 9px 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 14px; }
.top a { text-decoration: none; }
.top a:hover { text-decoration: underline; }
.top .up { color: #C9C9CF; }
.top .brand { font-family: var(--en); font-weight: 700; font-size: 16px; color: #FFF; }
.top .spacer { flex: 1; }
.tbtn { background: none; border: 1px solid #6B6B75; border-radius: 4px; padding: 2px 10px; color: #FFF; cursor: pointer; font-size: 13px; }
.tbtn:hover { border-color: #FFF; }
.foot { border-top: 1px solid var(--rule); margin-top: 56px; padding: 22px 0 36px; font-size: 13px; color: var(--mute); }
.foot p + p { margin-top: 8px; }

/* ── 首頁:開場 ── */
.intro { padding: 34px 0 6px; }
.intro .wrap { max-width: 820px; }
.kick { font-family: var(--en); font-weight: 700; font-size: 14px; letter-spacing: .02em; }
.intro h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.3; margin-top: 6px; }
.key-node { background: var(--node); color: #000; border: 2px solid #000; border-radius: 4px; padding: 0 5px; margin: 0 3px; font-size: 14px; }
.mine { margin-top: 14px; font-size: 14px; color: var(--mute); }
.mine b { color: var(--ink); font-size: 18px; }
.linkbtn { background: none; border: 0; padding: 0; color: var(--line); text-decoration: underline; cursor: pointer; font-size: 13px; }

/* ── 主幹 ── */
.spine { position: relative; max-width: 980px; margin: 18px auto 0; padding: 8px 16px 10px; }
.spine::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 34px; border-left: 3px dashed var(--line); transform: translateX(-1.5px); }
.rrow { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 236px minmax(0, 1fr); gap: 0 20px; align-items: center; margin: 30px 0; }
.rrow .node { grid-column: 2; grid-row: 1; }
.rrow.R .subs { grid-column: 3; grid-row: 1; border-left: 2px dashed var(--line); padding-left: 14px; }
.rrow.L .subs { grid-column: 1; grid-row: 1; border-right: 2px dashed var(--line); padding-right: 14px; align-items: flex-end; }
.end { position: relative; text-align: center; font-family: var(--en); font-size: 14px; color: var(--mute); padding-top: 8px; }
.end::before { content: ""; display: block; width: 14px; height: 14px; margin: 0 auto 6px; border-radius: 50%; background: var(--line); }

.node {
  position: relative; z-index: 1; width: 100%; display: grid; gap: 1px; justify-items: center;
  background: var(--node); color: var(--node-ink); border: 2.5px solid var(--node-b); border-radius: 6px;
  padding: 10px 26px 9px; cursor: pointer; text-align: center; line-height: 1.35;
}
.node:hover { background: #F2E900; }
.node .no { position: absolute; left: 7px; top: 5px; font: 500 11px/1 var(--mono); opacity: .7; }
.node .en { font: 700 17px/1.25 var(--en); }
.node .zh { font-size: 13px; }
.node .cnt { font-size: 12px; opacity: .8; }
.node .pg { margin-top: 5px; }
.pg { display: block; width: 100%; height: 5px; border-radius: 3px; background: rgba(0, 0, 0, .14); overflow: hidden; }
.pg i { display: block; height: 100%; width: 0; background: #1F5FBF; }
.node.off { background: var(--bg); color: var(--ink); border-style: dashed; border-color: var(--ink); }
.node.off:hover { background: var(--card); }
.node.off .pg { background: var(--rule); }
.node.off .pg i { background: var(--line); }

.subs { list-style: none; display: flex; flex-direction: column; gap: 6px; padding: 4px 0; }
.sub a {
  display: inline-flex; gap: 7px; align-items: baseline; max-width: 100%;
  background: var(--sub); color: var(--sub-ink); border: 2px solid var(--sub-b); border-radius: 5px;
  padding: 3px 9px; font-size: 13.5px; line-height: 1.45; text-decoration: none;
}
.sub a:hover { outline: 2px solid var(--line); outline-offset: 0; }
.sub .sn { font: 500 11px/1 var(--mono); opacity: .65; flex: none; }
.sub.is-done a { background: var(--done); }
.sub.is-done .stt { text-decoration: line-through; text-decoration-color: var(--line); text-decoration-thickness: 2px; }
.sub.is-done a::after { content: "✓"; color: var(--line); font-weight: 700; }
.sub.is-doing a { border-style: dashed; border-color: var(--doing); }
.sub.is-skip a { opacity: .5; }

/* ── 路線圖外的兩框:要跟節點一樣好逛,所以用同一顆按鈕、同一種小方塊 ── */
.offs { margin-top: 40px; }
.offs h2 { font-size: 22px; }
.offgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; align-items: start; }
.offs .wrap { max-width: 980px; }
.offbox { border: 2.5px dashed var(--mute); border-radius: 10px; padding: 14px; background: var(--off-bg); }
.offbox .desc { font-size: 14px; color: var(--mute); margin: 10px 0 8px; }

/* ── 跨場主題 ── */
.themes { margin-top: 48px; }
.themes .wrap { max-width: 820px; }
.themes h2 { font-size: 22px; }
.themes dl { margin-top: 16px; }
.themes dl > div { padding: 14px 0; border-top: 1px solid var(--rule); }
.themes dt { font-weight: 700; }
.themes dd { font-size: 14.5px; color: var(--mute); margin-top: 4px; }
.themes .tl { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.themes .tl a { font: 500 12px/1 var(--mono); padding: 4px 6px; border: 1.5px solid var(--sub-b); background: var(--sub); color: var(--sub-ink); border-radius: 4px; text-decoration: none; }

/* ── 抽屜 ── */
.scrim { position: fixed; inset: 0; background: var(--scrim); z-index: 40; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 50; width: min(460px, 100vw); overflow: auto;
  background: var(--bg); border-left: 1px solid var(--rule); box-shadow: -10px 0 30px rgba(0, 0, 0, .18);
  padding: 22px 22px 40px; transform: translateX(100%); visibility: hidden;
  transition: transform .22s ease, visibility 0s linear .22s;
}
.drawer.on { transform: none; visibility: visible; transition: transform .22s ease; }
.drawer:focus { outline: none; }
.drawer .x { position: absolute; right: 12px; top: 12px; width: 34px; height: 34px; border: 1.5px solid var(--ink); border-radius: 50%; background: var(--bg); cursor: pointer; }
.dk { font: 500 12px/1 var(--mono); color: var(--mute); }
.drawer h2 { font: 700 24px/1.25 var(--en); margin: 8px 44px 0 0; }
.dzh { font-weight: 700; margin-top: 2px; }
.ddesc { font-size: 14px; color: var(--mute); margin-top: 8px; }
.dprog { margin: 14px 0 6px; font-size: 13px; }
.dprog .pg { margin-top: 5px; background: var(--rule); }
.dprog .pg i { background: var(--line); }
.dlist { list-style: none; }
.dli { display: grid; grid-template-columns: 26px 1fr; gap: 8px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
.ck { padding-top: 3px; cursor: pointer; }
.ck input { width: 18px; height: 18px; margin: 0; accent-color: var(--line); cursor: pointer; }
.dbody a { text-decoration: none; }
.dbody a:hover b { text-decoration: underline; }
.dbody b { display: block; font-size: 15px; line-height: 1.45; }
.dm { display: block; font-size: 12.5px; color: var(--mute); margin-top: 2px; }
.dl { display: block; font-size: 13.5px; margin-top: 5px; }
.dli.is-done b { text-decoration: line-through; text-decoration-color: var(--line); text-decoration-thickness: 2px; }
.dli.is-skip { opacity: .55; }

/* ── 單場頁 ── */
.ep { padding-top: 22px; }
.crumb { display: flex; gap: 8px; flex-wrap: wrap; font-size: 13.5px; color: var(--mute); }
.crumb a { text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.crumb .here { background: var(--node); color: #000; border: 2px solid #000; border-radius: 4px; padding: 0 7px; font-family: var(--en); font-weight: 700; }
.statusbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 14px 0 6px; font-size: 13.5px; color: var(--mute); }
.statusbar label { font-weight: 700; color: var(--ink); }
.statusbar select { border: 1.5px solid var(--ink); border-radius: 4px; padding: 3px 8px; background: var(--bg); cursor: pointer; }
.ep h1 { font-size: clamp(24px, 4.5vw, 30px); line-height: 1.3; margin-top: 10px; }
.meta { display: flex; flex-wrap: wrap; gap: 0 14px; font-size: 13.5px; color: var(--mute); margin-top: 8px; }
.meta span:first-child { font-family: var(--mono); }
.orig { font-size: 14px; color: var(--mute); margin-top: 4px; }
.hero { margin-top: 18px; }
.hero img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border: 2px solid #000; border-radius: 8px; background: var(--card); }
.eplede { font-size: 17px; margin-top: 16px; }
.sh { font-size: 18px; margin: 34px 0 10px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.sh .c { font-size: 13px; font-weight: 400; color: var(--mute); }
.sh .tag { font-size: 11px; font-weight: 500; background: var(--line); color: #FFF; border-radius: 3px; padding: 1px 6px; }
.pts { padding-left: 1.2em; }
.pts li + li { margin-top: 8px; }
.tl { list-style: none; }
.tl li { display: grid; grid-template-columns: 74px 1fr; gap: 0 10px; padding: 8px 0; border-bottom: 1px solid var(--rule); }
.tc { grid-row: span 2; align-self: start; justify-self: start; font: 500 12.5px/1.6 var(--mono); background: var(--sub); color: var(--sub-ink); border: 1.5px solid var(--sub-b); border-radius: 4px; padding: 0 6px; text-decoration: none; }
.tc:hover { outline: 2px solid var(--line); }
.tl .sg { font-weight: 700; }
.tl .nt { font-size: 14.5px; color: var(--mute); }
.qs { list-style: none; }
.qs li + li { margin-top: 14px; }
.qs blockquote { border-left: 3px solid var(--line); padding-left: 14px; }
.qs q { display: block; font-style: italic; }
.qs .zh { display: block; color: var(--mute); font-size: 14.5px; margin-top: 2px; }
.atq { font: 500 12px/1 var(--mono); color: var(--line); }
.tm > div { padding: 8px 0; border-bottom: 1px solid var(--rule); }
.tm dt { font-weight: 700; }
.tm dd { font-size: 14.5px; color: var(--mute); }
.ex { padding-left: 1.2em; font-size: 15px; }
.ex li + li { margin-top: 6px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 26px; }
.tags span { font-size: 12.5px; border: 1px solid var(--rule); border-radius: 999px; padding: 1px 10px; color: var(--mute); }
.ytl { margin-top: 14px; }
.ytl a { color: var(--line); font-weight: 700; }

.mates ol { list-style: none; }
.mate { display: grid; grid-template-columns: 20px 1fr; gap: 10px; padding: 8px 6px; border-bottom: 1px solid var(--rule); }
.mk { width: 18px; height: 18px; margin-top: 4px; border: 2px solid var(--ink); border-radius: 3px; display: grid; place-items: center; font-size: 12px; line-height: 1; }
.mate.is-done .mk { background: var(--line); border-color: var(--line); color: #FFF; }
.mate.is-done .mk::after { content: "✓"; }
.mate.is-doing .mk { border-style: dashed; border-color: var(--doing); }
.mate.is-skip { opacity: .55; }
.mate.me { background: var(--sub); color: var(--sub-ink); border-radius: 5px; }
.mate.me .mk { border-color: currentColor; }
.mt { text-decoration: none; display: block; }
.mt b { display: block; font-size: 15px; line-height: 1.45; }
a.mt:hover b { text-decoration: underline; }
.mm { display: block; font-size: 12.5px; opacity: .75; }
.mate.is-done b { text-decoration: line-through; text-decoration-color: var(--line); }

.epnav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 28px; }
.epnav a { display: block; border: 2px solid var(--ink); border-radius: 6px; padding: 10px 12px; text-decoration: none; font-size: 14.5px; line-height: 1.45; }
.epnav a:hover { background: var(--card); }
.epnav .r { text-align: right; }
.epnav .k { display: block; font-size: 12px; color: var(--mute); }
.mini { margin-top: 28px; }
.mini p { font-size: 13px; color: var(--mute); }
.mini ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.mini a { display: inline-flex; gap: 6px; align-items: baseline; font: 400 13px/1.5 var(--en); border: 1.5px solid var(--ink); border-radius: 4px; padding: 1px 8px; text-decoration: none; }
.mini a span { font: 500 11px/1 var(--mono); opacity: .6; }
.mini .off a { border-style: dashed; }
.mini .on a { background: var(--node); color: #000; border-color: #000; font-weight: 700; }

/* ── 名詞速查 ── */
.gh { padding-top: 30px; }
.gh h1 { font-size: 30px; }
.gbox { display: flex; gap: 12px; align-items: center; margin: 18px 0 10px; }
.gbox input { flex: 1; min-width: 0; border: 2px solid var(--ink); border-radius: 6px; padding: 7px 12px; background: var(--bg); }
.gcount { font-size: 13px; color: var(--mute); white-space: nowrap; }
.gl .term { padding: 10px 0; border-bottom: 1px solid var(--rule); }
.gl dt { font-weight: 700; }
.gl dd p { font-size: 14.5px; color: var(--mute); }
.gl dd p + p { margin-top: 4px; }
.gl .src { font: 500 12px/1 var(--mono); color: var(--line); }

/* ── 窄螢幕:主幹改到左邊,小方塊排在節點下面 ── */
@media (max-width: 720px) {
  .spine::before { left: 24px; }
  .rrow { grid-template-columns: minmax(0, 1fr); margin: 22px 0; }
  .rrow .node { grid-column: 1; grid-row: 1; }
  .rrow.R .subs, .rrow.L .subs { grid-column: 1; grid-row: 2; border: 0; border-left: 2px dashed var(--line); padding: 8px 0 4px 14px; margin-left: 24px; align-items: flex-start; }
  .end { text-align: left; padding-left: 4px; }
  .end::before { margin: 0 0 6px 18px; }
  .offgrid { grid-template-columns: minmax(0, 1fr); }
  .epnav { grid-template-columns: minmax(0, 1fr); }
  .epnav .r { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  .drawer, .drawer.on { transition: none; }
}