/* =========================================================================
   multipage · Material Design 3 baseline (pure CSS, no build)
   Shared by every page. Tokens + chrome + one block per page layout.
   ========================================================================= */

/* ---- MD3 tokens : LIGHT ---- */
:root,
[data-theme="light"] {
  --primary:#6750A4; --on-primary:#FFFFFF; --primary-container:#EADDFF; --on-primary-container:#21005D;
  --secondary:#625B71; --secondary-container:#E8DEF8; --on-secondary-container:#1D192B;
  --tertiary:#7D5260; --tertiary-container:#FFD8E4;
  --background:#FEF7FF; --on-background:#1D1B20; --surface:#FEF7FF;
  --surface-container:#F3EDF7; --surface-container-high:#ECE6F0; --surface-variant:#E7E0EC;
  --on-surface:#1D1B20; --on-surface-variant:#49454F;
  --outline:#79747E; --outline-variant:#CAC4D0; --error:#B3261E; --success:#2E7D32;
  --elev-1:0 1px 2px rgba(0,0,0,.10),0 1px 3px 1px rgba(0,0,0,.06);
  --elev-2:0 2px 6px 2px rgba(0,0,0,.10),0 1px 2px rgba(0,0,0,.12);
  --elev-3:0 4px 8px 3px rgba(0,0,0,.12),0 1px 3px rgba(0,0,0,.14);
  --radius-sm:8px; --radius:16px; --radius-lg:28px;
  --font-body:"Roboto Flex","Roboto","Noto Sans TC",system-ui,sans-serif;
}
/* ---- MD3 tokens : DARK ---- */
[data-theme="dark"] {
  --primary:#D0BCFF; --on-primary:#381E72; --primary-container:#4F378B; --on-primary-container:#EADDFF;
  --secondary:#CCC2DC; --secondary-container:#4A4458; --on-secondary-container:#E8DEF8;
  --tertiary:#EFB8C8; --tertiary-container:#633B48;
  --background:#141218; --on-background:#E6E0E9; --surface:#141218;
  --surface-container:#211F26; --surface-container-high:#2B2930; --surface-variant:#49454F;
  --on-surface:#E6E0E9; --on-surface-variant:#CAC4D0;
  --outline:#938F99; --outline-variant:#49454F; --error:#F2B8B5; --success:#A5D6A7;
}

/* ---- Reset / base ---- */
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  margin:0; font-family:var(--font-body); background:var(--background); color:var(--on-background);
  -webkit-font-smoothing:antialiased; transition:background .2s,color .2s; overflow-x:hidden;
}
a { color:inherit; text-decoration:none; }
.material-symbols-rounded { font-variation-settings:"FILL" 0,"wght" 400,"GRAD" 0,"opsz" 24; line-height:1; user-select:none; }
.skip-link {
  position:absolute; left:-999px; top:8px; z-index:60; background:var(--primary); color:var(--on-primary);
  padding:8px 14px; border-radius:var(--radius-lg);
}
.skip-link:focus { left:12px; }

/* ---- App bar ---- */
.appbar { position:sticky; top:0; z-index:30; background:var(--surface-container); box-shadow:var(--elev-1); }
.appbar__inner { max-width:1100px; margin:0 auto; padding:10px 16px; display:flex; align-items:center; gap:12px; }
.brand { display:flex; align-items:center; gap:8px; font-weight:700; font-size:1.1rem; color:var(--on-surface); min-width:0; overflow:hidden; }
.brand__logo { color:var(--primary); flex:0 0 auto; }
.brand__name { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.appbar__actions { margin-left:auto; display:flex; align-items:center; gap:8px; flex:0 0 auto; }
.icon-btn { display:inline-flex; align-items:center; gap:4px; border:none; background:transparent; color:var(--on-surface-variant);
  border-radius:var(--radius-lg); padding:8px 10px; cursor:pointer; font:inherit; transition:background .15s; }
.icon-btn:hover { background:var(--surface-container-high); }
.icon-btn__txt { font-size:.85rem; font-weight:500; }

/* ---- Cross-page nav ---- */
.pagenav {
  position:sticky; top:56px; z-index:25; border-bottom:1px solid var(--outline-variant);
  background:color-mix(in srgb,var(--background) 88%,transparent); backdrop-filter:saturate(180%) blur(8px);
}
.pagenav__inner { max-width:1100px; margin:0 auto; padding:8px 12px; display:flex; gap:8px; overflow-x:auto; scrollbar-width:none; }
.pagenav__inner::-webkit-scrollbar { display:none; }
.navpill {
  display:inline-flex; align-items:center; gap:6px; flex:0 0 auto; padding:7px 14px; border-radius:var(--radius-lg);
  font-size:.85rem; font-weight:500; color:var(--on-surface-variant); border:1px solid var(--outline-variant);
  background:transparent; white-space:nowrap; cursor:pointer; transition:background .15s,color .15s,border-color .15s;
}
.navpill .material-symbols-rounded { font-size:18px; }
.navpill:hover { background:var(--surface-container-high); }
.navpill--active { background:var(--secondary-container); color:var(--on-secondary-container); border-color:transparent; }

/* ---- Page scaffold ---- */
.page { max-width:1100px; margin:0 auto; padding:32px 16px 16px; }
.page-head { margin-bottom:22px; }
.page-head h1 { margin:0 0 6px; font-size:clamp(1.6rem,4vw,2.2rem); font-weight:700; letter-spacing:-.01em; color:var(--on-surface); }
.page-head__sub { margin:0; max-width:62ch; font-size:1rem; line-height:1.5; color:var(--on-surface-variant); }
.empty { color:var(--on-surface-variant); }

/* ---- Hero stats (hub) ---- */
.hero__stats { display:grid; grid-template-columns:repeat(auto-fit,minmax(140px,1fr)); gap:14px; margin:0 0 26px; }
.hero__stat { background:var(--surface-container); border-radius:var(--radius); padding:20px 18px; display:flex; flex-direction:column; gap:4px; border:1px solid var(--outline-variant); }
.hero__stat-value { font-size:2rem; font-weight:700; color:var(--primary); font-variant-numeric:tabular-nums; line-height:1.1; }
.hero__stat-label { font-size:.85rem; color:var(--on-surface-variant); }

/* ---- Cards grid ---- */
.grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px; }
.card { background:var(--surface-container); border-radius:var(--radius); padding:20px; cursor:pointer;
  border:1px solid transparent; transition:box-shadow .18s,transform .18s,border-color .18s; display:flex; flex-direction:column; gap:10px; }
.card:hover,.card:focus-visible { box-shadow:var(--elev-2); transform:translateY(-2px); border-color:var(--outline-variant); outline:none; }
.card--nav .card__icon { font-size:28px; color:var(--primary); }
.card__title { margin:0; font-size:1.05rem; font-weight:600; color:var(--on-surface); }
.card__summary { margin:0; font-size:.9rem; line-height:1.5; color:var(--on-surface-variant); }
.card__tags { margin-top:auto; display:flex; flex-wrap:wrap; gap:6px; }
.tag { font-size:.72rem; color:var(--on-surface-variant); background:var(--surface-variant); padding:2px 8px; border-radius:var(--radius-sm); }

/* ---- Toolbar / search / chips ---- */
.toolbar { display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-bottom:14px; }
.search { flex:1 1 220px; min-width:160px; padding:10px 14px; border-radius:var(--radius-lg); border:1px solid var(--outline-variant);
  background:var(--surface-container); color:var(--on-surface); font:inherit; }
.search:focus { outline:2px solid var(--primary); outline-offset:1px; }
.chips { display:flex; flex-wrap:wrap; gap:8px; }
.chip { padding:7px 14px; border-radius:var(--radius-lg); font-size:.85rem; font-weight:500; color:var(--on-surface-variant);
  border:1px solid var(--outline-variant); background:transparent; cursor:pointer; transition:background .15s,color .15s; }
.chip:hover { background:var(--surface-container-high); }
.chip--active { background:var(--secondary-container); color:var(--on-secondary-container); border-color:transparent; }
.result-count { margin:0 0 14px; font-size:.85rem; color:var(--on-surface-variant); }

/* ---- Article ---- */
.reading-progress { position:fixed; top:0; left:0; height:3px; width:0; background:var(--primary); z-index:40; transition:width .1s linear; }
.article-layout { display:grid; grid-template-columns:200px minmax(0,1fr); gap:32px; align-items:start; }
/* grid/flex item 預設 min-width:auto —— 不設 0 的話,一個寬表格會把整個軌道
   撐得比視窗寬,裡面 .table-wrap 的 overflow-x:auto 就永遠不會生效。 */
.article-body { min-width:0; }
.prose .table-wrap { max-width:100%; }
.toc { position:sticky; top:108px; }
.toc__inner { display:flex; flex-direction:column; gap:4px; border-left:2px solid var(--outline-variant); }
.toc-link { padding:6px 14px; font-size:.9rem; color:var(--on-surface-variant); border-left:2px solid transparent; margin-left:-2px; }
.toc-link:hover { color:var(--on-surface); }
.toc-link--active { color:var(--primary); border-left-color:var(--primary); font-weight:600; }
.prose { max-width:70ch; color:var(--on-surface-variant); }
.prose h2 { color:var(--on-surface); font-size:1.4rem; margin:0 0 12px; scroll-margin-top:120px; }
.prose h3 { color:var(--on-surface); font-size:1.12rem; margin:22px 0 8px; }
.prose p { line-height:1.75; margin:0 0 14px; }
.prose ul { margin:0 0 14px; padding-left:22px; line-height:1.75; }
.prose blockquote { margin:0 0 16px; padding:8px 18px; border-left:4px solid var(--primary); color:var(--on-surface); font-style:italic; }
.prose pre { background:var(--surface-container); padding:14px 16px; border-radius:var(--radius); overflow:auto; border:1px solid var(--outline-variant); }
.prose code { font-family:"Roboto Mono",ui-monospace,monospace; font-size:.85rem; }
.article-section { margin-bottom:28px; }

/* ---- Dashboard ---- */
.stat-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:16px; margin-bottom:20px; }
.stat-card { background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius); padding:18px; display:flex; flex-direction:column; gap:6px; }
.stat-label { font-size:.82rem; color:var(--on-surface-variant); }
.stat-value { font-size:1.6rem; font-weight:700; color:var(--on-surface); font-variant-numeric:tabular-nums; }
.stat-unit { font-size:.85rem; font-weight:500; color:var(--on-surface-variant); }
.stat-delta { font-size:.8rem; font-weight:600; }
.stat-delta--up { color:var(--success); }
.stat-delta--down { color:var(--error); }
.panel-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:16px; margin-bottom:20px; }
.panel { margin:0; background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius); padding:18px; }
.panel figcaption { font-weight:600; color:var(--on-surface); margin-bottom:10px; }
.panel--wide { grid-column:1/-1; }
.chart-wrap { width:100%; }
.chart-wrap svg { width:100%; height:auto; display:block; }
.bar-rect { fill:var(--primary); transition:fill .15s; }
.bar-rect:hover { fill:var(--tertiary); }
.bar-value { fill:var(--on-surface); font-size:13px; font-weight:600; font-family:var(--font-body); }
.bar-label { fill:var(--on-surface-variant); font-size:12px; font-family:var(--font-body); }
.axis-line { stroke:var(--outline-variant); stroke-width:1.5; }
.line-path { stroke:var(--primary); stroke-width:2.5; }
.line-area { fill:var(--primary); opacity:.12; }
.line-dot { fill:var(--primary); }

/* ---- Data table ---- */
.table-wrap { overflow-x:auto; border-radius:var(--radius); border:1px solid var(--outline-variant); }
.data-table,.cmp-table { width:100%; border-collapse:collapse; background:var(--surface-container); font-size:.9rem; }
.data-table th,.data-table td { padding:11px 14px; text-align:left; border-bottom:1px solid var(--outline-variant); color:var(--on-surface); white-space:nowrap; }
.data-table thead th { background:var(--surface-container-high); font-weight:600; color:var(--on-surface-variant); position:sticky; top:0; }
.th-sort { cursor:pointer; user-select:none; }
.th-sort:hover { color:var(--primary); }
.data-table tbody tr:hover { background:var(--surface-container-high); }
.row-link { color:var(--primary); }

/* ---- Timeline ---- */
.timeline { list-style:none; margin:0; padding:0; position:relative; }
.timeline::before { content:""; position:absolute; left:7px; top:6px; bottom:6px; width:2px; background:var(--outline-variant); }
.tl-item { position:relative; padding:0 0 18px 36px; }
.tl-item:last-child { padding-bottom:0; }
.tl-dot { position:absolute; left:0; top:6px; width:16px; height:16px; border-radius:50%; background:var(--primary); border:3px solid var(--background); box-shadow:0 0 0 2px var(--primary); }
.tl-card { background:var(--surface-container); border-radius:var(--radius); padding:14px 18px; border:1px solid var(--outline-variant); }
.tl-date { font-size:.78rem; font-weight:600; letter-spacing:.04em; color:var(--primary); }
.tl-title { margin:4px 0 6px; font-size:1.05rem; color:var(--on-surface); }
.tl-body { margin:0; font-size:.9rem; line-height:1.5; color:var(--on-surface-variant); }

/* ---- Bento ---- */
.bento { display:grid; grid-template-columns:repeat(4,1fr); grid-auto-rows:120px; gap:14px; }
.tile { background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius); padding:18px; display:flex; flex-direction:column; gap:6px; overflow:hidden; }
.tile--accent { background:linear-gradient(135deg,var(--primary-container),var(--secondary-container)); border-color:transparent; }
.tile--lg { grid-column:span 2; grid-row:span 2; }
.tile--tall { grid-row:span 2; }
.tile--wide { grid-column:span 2; }
.tile--md { grid-column:span 2; }
.tile__icon { font-size:26px; color:var(--primary); }
.tile__value { font-size:1.7rem; font-weight:700; color:var(--on-surface); }
.tile__title { margin:0; font-size:1rem; color:var(--on-surface); }
.tile__body { margin:0; font-size:.85rem; line-height:1.45; color:var(--on-surface-variant); }

/* ---- Kanban ---- */
.kanban { display:grid; grid-auto-flow:column; grid-auto-columns:minmax(240px,1fr); gap:14px; overflow-x:auto; padding-bottom:8px; }
.kb-col { background:var(--surface-container-high); border-radius:var(--radius); padding:12px; }
.kb-col__head { display:flex; align-items:center; gap:8px; font-weight:600; color:var(--on-surface); margin-bottom:10px; padding:0 4px; }
.kb-col__count { font-size:.75rem; background:var(--secondary-container); color:var(--on-secondary-container); border-radius:var(--radius-lg); padding:1px 8px; }
.kb-col__body { display:flex; flex-direction:column; gap:10px; }
.kb-card { background:var(--surface); border:1px solid var(--outline-variant); border-radius:var(--radius-sm); padding:12px 14px; display:flex; flex-direction:column; gap:8px; }
.kb-card__title { margin:0; font-size:.95rem; color:var(--on-surface); }
.kb-card__body { margin:0; font-size:.82rem; line-height:1.45; color:var(--on-surface-variant); }

/* ---- Accordion (faq) ---- */
.accordion { display:flex; flex-direction:column; gap:10px; }
.acc-item { background:var(--surface-container); border-radius:var(--radius); border:1px solid var(--outline-variant); overflow:hidden; }
.acc-q { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:16px 18px; cursor:pointer; font-weight:600; color:var(--on-surface); list-style:none; }
.acc-q::-webkit-details-marker { display:none; }
.acc-chevron { transition:transform .2s; color:var(--on-surface-variant); }
.acc-item[open] .acc-chevron { transform:rotate(180deg); }
.acc-a { padding:0 18px 18px; font-size:.92rem; line-height:1.6; color:var(--on-surface-variant); }

/* ---- Comparison ---- */
.cmp-table th,.cmp-table td { padding:14px 16px; text-align:center; border-bottom:1px solid var(--outline-variant); color:var(--on-surface); }
.cmp-table thead th { vertical-align:bottom; }
.cmp-feat { text-align:left !important; font-weight:600; color:var(--on-surface-variant); }
.cmp-plan { font-weight:700; font-size:1.05rem; }
.cmp-price { color:var(--primary); font-weight:600; }
.cmp-note { font-size:.78rem; color:var(--on-surface-variant); }
.cmp-col--hl { background:var(--secondary-container); }
.cmp-yes { color:var(--success); }
.cmp-no { color:var(--outline); }

/* ---- Leaderboard ---- */
.seg { display:inline-flex; gap:4px; background:var(--surface-container-high); border-radius:var(--radius-lg); padding:4px; margin-bottom:18px; }
.seg__btn { border:none; background:transparent; color:var(--on-surface-variant); padding:8px 18px; border-radius:var(--radius-lg); cursor:pointer; font:inherit; font-weight:500; }
.seg__btn--active { background:var(--primary); color:var(--on-primary); }
.lb-list { list-style:none; margin:0 0 18px; padding:0; display:flex; flex-direction:column; gap:8px; }
.lb-row { display:grid; grid-template-columns:auto auto 1fr auto auto; align-items:center; gap:12px; background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius); padding:12px 16px; }
.lb-rank { font-variant-numeric:tabular-nums; font-weight:700; color:var(--on-surface-variant); min-width:1.5em; }
.lb-tier { font-weight:700; width:1.8em; height:1.8em; display:inline-grid; place-items:center; border-radius:50%; color:#fff; font-size:.8rem; }
.lb-tier--S { background:#B3261E; } .lb-tier--A { background:#7D5260; } .lb-tier--B { background:#6750A4; }
.lb-tier--C { background:#625B71; } .lb-tier--D { background:#79747E; }
.lb-name { font-weight:600; color:var(--on-surface); }
.lb-meta { font-size:.82rem; color:var(--on-surface-variant); }
.lb-score { font-weight:700; font-variant-numeric:tabular-nums; color:var(--primary); }
.lb-tier-group { margin-bottom:16px; }
.lb-tier-head { display:inline-grid; place-items:center; min-width:2em; height:2em; border-radius:var(--radius-sm); color:#fff; font-weight:700; padding:0 10px; margin-bottom:10px; }

/* ---- Scrolly ---- */
.scrolly { display:grid; grid-template-columns:1fr 1fr; gap:32px; align-items:start; }
.scrolly-sticky { position:sticky; top:120px; height:60vh; display:flex; }
.scrolly-visual { flex:1; display:flex; align-items:center; justify-content:center; background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius-lg); padding:24px; }
.scrolly-stat { font-size:2.4rem; font-weight:700; text-align:center; }
.scrolly-steps { display:flex; flex-direction:column; gap:60vh; padding:20vh 0; }
.scrolly-step { background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius); padding:20px 22px; opacity:.4; transition:opacity .3s; }
.scrolly-step p { margin:0; font-size:1.1rem; line-height:1.6; color:var(--on-surface); }
.scrolly-step--active { opacity:1; }

/* ---- Map ---- */
.map-layout { display:grid; grid-template-columns:1fr 300px; gap:18px; align-items:start; }
.map-box { height:460px; border-radius:var(--radius); overflow:hidden; border:1px solid var(--outline-variant); background:var(--surface-container); }
.map-fallback { height:100%; display:flex; align-items:center; justify-content:center; color:var(--on-surface-variant); padding:20px; text-align:center; }
.map-list { list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; max-height:460px; overflow:auto; }
.place { display:flex; flex-direction:column; gap:3px; background:var(--surface-container); border:1px solid var(--outline-variant); border-radius:var(--radius-sm); padding:12px 14px; cursor:pointer; }
.place:hover,.place:focus-visible { border-color:var(--primary); outline:none; }
.place b { color:var(--on-surface); }
.place span { font-size:.82rem; color:var(--on-surface-variant); }

/* ---- Dialog ---- */
.dialog { border:none; border-radius:var(--radius-lg); background:var(--surface-container-high); color:var(--on-surface); max-width:600px; width:calc(100% - 32px); padding:0; box-shadow:var(--elev-3); }
.dialog::backdrop { background:rgba(0,0,0,.5); }
.dialog__bar { display:flex; align-items:center; padding:8px 12px; border-bottom:1px solid var(--outline-variant); position:sticky; top:0; background:var(--surface-container-high); }
.dialog__spacer { flex:1; }
.dialog__body { padding:24px; }
.dialog__body h2 { margin-top:0; color:var(--on-surface); }
.dialog__body p { color:var(--on-surface-variant); line-height:1.65; }
.dialog__body .card__tags { margin:0 0 14px; }

/* ---- Footer ---- */
.footer { text-align:center; padding:32px 16px; margin-top:32px; color:var(--on-surface-variant); font-size:.85rem; border-top:1px solid var(--outline-variant); }

/* ---- Responsive ---- */
@media (max-width:860px) {
  .article-layout { grid-template-columns:minmax(0,1fr); }
  .toc { position:static; }
  .toc__inner { flex-direction:row; flex-wrap:wrap; border-left:none; }
  .scrolly { grid-template-columns:1fr; }
  .scrolly-sticky { position:sticky; top:64px; height:auto; }
  .scrolly-steps { gap:30vh; padding:10vh 0; }
  .map-layout { grid-template-columns:1fr; }
  .map-list { flex-direction:row; max-height:none; }
  .bento { grid-template-columns:repeat(2,1fr); }
  .tile--lg,.tile--wide,.tile--md { grid-column:span 2; }
}
@media (max-width:600px) {
  .grid { grid-template-columns:1fr; }
  .bento { grid-template-columns:1fr; }
  .tile--lg,.tile--wide,.tile--md,.tile--tall { grid-column:span 1; grid-row:span 1; }
  .lb-row { grid-template-columns:auto auto 1fr auto; }
  .lb-meta { display:none; }
  .icon-btn__txt { font-size:.8rem; }
}
@media (max-width:375px) {
  .appbar__inner,.pagenav__inner,.page { padding-left:12px; padding-right:12px; }
  .page-head h1 { font-size:1.4rem; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion:reduce) {
  html { scroll-behavior:auto; }
  * { transition:none !important; }
}

/* GitHub star button */
.gh-star {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  font-size: .85rem;
  font-weight: 500;
  color: var(--on-surface);
  transition: background .15s;
}
.gh-star:hover { background: var(--surface-container-high); }
.gh-star .material-symbols-rounded { color: #f5a623; font-size: 20px; }
.gh-star__count {
  padding-left: 6px;
  border-left: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 600px) { .gh-star__label { display: none; } }
/* footer profile links (home + LinkedIn) */
.footer__links {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}
.footer__link svg { display: block; }

/* 靜態備援語言連結(無 JS 時可見;shell.js 注入 chrome 後會隱藏) */
.lang-fallback {
  text-align: center;
  padding: 16px;
  font-size: 0.875rem;
}
.lang-fallback a { color: var(--primary); }

/* =========================================================================
   Conference notes — added layouts: `session` and `composite`
   Colours come only from the MD3 tokens above, so both themes follow.
   ========================================================================= */

/* ---- nav group labels (17 pages need sections, not one flat pill row) ---- */
.navgroup {
  flex:0 0 auto; align-self:center; padding:0 4px 0 10px; margin-left:4px;
  border-left:1px solid var(--outline-variant);
  font-size:.7rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase;
  color:var(--on-surface-variant); opacity:.75; white-space:nowrap;
}
.pagenav__inner > .navgroup:first-child { border-left:none; margin-left:0; padding-left:4px; }

/* =========================  SESSION  ===================================== */
.sess-meta { display:flex; flex-wrap:wrap; gap:8px; margin:-4px 0 24px; }
.sess-bit {
  display:inline-flex; align-items:center; gap:6px; padding:6px 12px;
  border-radius:var(--radius-lg); background:var(--surface-container);
  font-size:.85rem; color:var(--on-surface-variant);
}
.sess-bit .material-symbols-rounded { font-size:18px; color:var(--primary); }

.sess-overview { margin:0 0 32px; }
.sess-overview h2, .sess-talks h2 { font-size:1.15rem; margin:0 0 12px; }
.sess-overview .data-table td:first-child { white-space:nowrap; font-weight:500; }

.sess-talks__bar {
  display:flex; flex-wrap:wrap; align-items:center; gap:12px;
  margin-bottom:8px; padding-bottom:12px; border-bottom:1px solid var(--outline-variant);
}
.sess-talks__bar h2 { margin:0; }
.toolbar--inline { margin:0 0 0 auto; padding:0; display:flex; gap:8px; align-items:center; flex:1 1 260px; }
.toolbar--inline .search { flex:1 1 auto; min-width:0; }

.talks { display:flex; flex-direction:column; gap:12px; margin-top:16px; }
.talk {
  border:1px solid var(--outline-variant); border-radius:var(--radius);
  background:var(--surface-container); overflow:hidden; transition:box-shadow .15s,border-color .15s;
}
.talk[open] { box-shadow:var(--elev-1); border-color:var(--primary); }
.talk__head {
  display:flex; align-items:flex-start; gap:12px; padding:16px 18px; cursor:pointer;
  list-style:none; user-select:none;
}
.talk__head::-webkit-details-marker { display:none; }
.talk__head:hover { background:var(--surface-container-high); }
.talk__no {
  flex:0 0 auto; width:26px; height:26px; border-radius:50%;
  background:var(--primary-container); color:var(--on-primary-container);
  display:grid; place-items:center; font-size:.8rem; font-weight:700; margin-top:2px;
}
.talk__headings { display:flex; flex-direction:column; gap:3px; min-width:0; flex:1 1 auto; }
.talk__title { font-weight:600; line-height:1.4; }
.talk__speaker { font-size:.85rem; color:var(--on-surface-variant); }
.talk .acc-chevron { flex:0 0 auto; margin-top:2px; transition:transform .2s; color:var(--on-surface-variant); }
.talk[open] .acc-chevron { transform:rotate(180deg); }

.talk__body { padding:0 18px 20px; border-top:1px solid var(--outline-variant); }
.talk-gist {
  margin:16px 0 20px; padding:12px 16px; border-left:3px solid var(--primary);
  background:var(--surface-container-high); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.95rem; line-height:1.7;
}
.talk-part { margin:0 0 20px; }
.talk-part:last-child { margin-bottom:0; }
.talk-part > h4 {
  display:flex; align-items:center; gap:6px; margin:0 0 10px;
  font-size:.78rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  color:var(--on-surface-variant);
}
.talk-part > h4 .material-symbols-rounded { font-size:17px; color:var(--primary); }
.talk-part ul { margin:0; padding-left:1.25em; }
.talk-part li { margin:0 0 8px; line-height:1.75; }
.talk-sub { margin:8px 0 0 !important; padding-left:1.1em; }
.talk-sub li { font-size:.92rem; color:var(--on-surface-variant); margin-bottom:5px; }
.talk-part blockquote {
  margin:0 0 10px; padding:10px 16px; border-left:3px solid var(--tertiary);
  background:var(--surface-container-high); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-style:italic; line-height:1.7;
}
.talk-tech { margin:0; display:flex; flex-direction:column; gap:8px; }
.talk-tech__row {
  display:grid; grid-template-columns:minmax(120px,.32fr) 1fr; gap:4px 14px;
  padding-bottom:8px; border-bottom:1px dashed var(--outline-variant);
}
.talk-tech__row:last-child { border-bottom:none; padding-bottom:0; }
.talk-tech dt { font-weight:600; font-size:.9rem; }
.talk-tech dd { margin:0; font-size:.9rem; color:var(--on-surface-variant); line-height:1.65; }
.talk-part--checks li { font-size:.9rem; color:var(--on-surface-variant); }
.talk-srcs { display:block; margin-top:5px; font-size:.82rem; }
.talk-src { color:var(--primary); text-decoration:underline; text-underline-offset:2px; }
.talk-src + .talk-src { margin-left:8px; }
.talk-src:hover { opacity:.75; }

/* =========================  COMPOSITE  =================================== */
.secnav {
  /* 不做滿版出血:負邊距要跟 #page 的內距完全對齊才不會溢出,
     而內距會隨斷點改變 —— 對不齊就是橫向捲軸。留在內容框裡最穩。 */
  position:sticky; top:104px; z-index:20; margin:-8px 0 24px;
  background:color-mix(in srgb,var(--background) 90%,transparent); backdrop-filter:blur(8px);
}
.secnav__inner {
  display:flex; gap:6px; overflow-x:auto; scrollbar-width:none;
  padding:8px 0; border-bottom:1px solid var(--outline-variant);
}
.secnav__inner::-webkit-scrollbar { display:none; }
.secnav__link {
  flex:0 0 auto; padding:5px 12px; border-radius:var(--radius-lg); white-space:nowrap;
  font-size:.82rem; font-weight:500; color:var(--on-surface-variant); transition:background .15s,color .15s;
}
.secnav__link:hover { background:var(--surface-container); }
.secnav__link--active { background:var(--secondary-container); color:var(--on-secondary-container); }

.composite { display:flex; flex-direction:column; gap:56px; }
.sec { scroll-margin-top:150px; }
.sec__head { margin:0 0 20px; }
.sec__head h2 { margin:0 0 6px; font-size:1.5rem; line-height:1.3; }
.sec__head p { margin:0; color:var(--on-surface-variant); line-height:1.6; }

.hero { text-align:center; padding:24px 0 8px; }
.hero__title { margin:0 0 12px; font-size:clamp(1.9rem,5vw,2.9rem); line-height:1.2; letter-spacing:-.01em; }
.hero__sub { margin:0 auto; max-width:56ch; color:var(--on-surface-variant); font-size:1.02rem; line-height:1.7; }
.hero .hero__stats { margin-top:32px; }

.quotewall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:16px; }
.quotecard {
  margin:0; padding:20px; border-radius:var(--radius); background:var(--surface-container);
  border-left:3px solid var(--tertiary); display:flex; flex-direction:column; gap:10px;
}
.quotecard blockquote { margin:0; font-style:italic; line-height:1.75; }
.quotecard figcaption { font-size:.82rem; color:var(--on-surface-variant); font-weight:500; }

.tl-card--link { display:block; position:relative; padding-right:44px; transition:box-shadow .15s,transform .15s; }
.tl-card--link:hover { box-shadow:var(--elev-2); transform:translateY(-1px); }
.tl-go { position:absolute; right:16px; top:50%; transform:translateY(-50%); color:var(--primary); }

.cta { padding:28px; border-radius:var(--radius-lg); background:var(--surface-container); text-align:center; }
.cta p { margin:0 auto 20px; max-width:60ch; color:var(--on-surface-variant); line-height:1.7; }
.cta__links { display:flex; flex-wrap:wrap; gap:10px; justify-content:center; }
.cta__btn {
  display:inline-flex; align-items:center; gap:6px; padding:10px 20px; border-radius:var(--radius-lg);
  background:var(--primary); color:var(--on-primary); font-size:.9rem; font-weight:500;
  transition:opacity .15s;
}
.cta__btn:hover { opacity:.88; }
.cta__btn .material-symbols-rounded { font-size:18px; }

/* ---- source link lists (article `links` blocks) ---- */
.srclist { margin:8px 0 16px; padding-left:1.25em; }
.srclist li { margin-bottom:5px; }
.srclist a { color:var(--primary); text-decoration:underline; text-underline-offset:2px; word-break:break-word; }

/* ---- narrow screens ---- */
@media (max-width:720px) {
  .secnav { top:96px; }
  .sess-talks__bar { flex-direction:column; align-items:stretch; }
  .toolbar--inline { margin-left:0; }
  .talk-tech__row { grid-template-columns:1fr; gap:2px; }
  .talk__head { padding:14px; }
  .talk__body { padding:0 14px 16px; }
  .composite { gap:44px; }
}

/* 場次頁的「全部展開／收合」——刻意不叫 .chip:
   這個設計系統裡 .chip 專指篩選晶片,共用會讓語意與自動化檢查都失準。 */
.btn-toggle {
  flex:0 0 auto; padding:7px 14px; border-radius:var(--radius-lg);
  font-size:.82rem; font-weight:500; font-family:inherit; white-space:nowrap;
  color:var(--on-surface-variant); border:1px solid var(--outline-variant);
  background:transparent; cursor:pointer; transition:background .15s,color .15s;
}
.btn-toggle:hover { background:var(--surface-container-high); color:var(--on-surface); }