/* Layout: archive shelf; slim top bar, edition header with proceedings cover, tabbed sections, long lists. */
/* Colours and display face follow the CEST2025 site (cest.gnest.org): green, dark blue, light blue, gold, Comfortaa. */
:root {
  --bg: #f6f7fa; --surface: #ffffff; --text: #1f1e3d; --muted: #5b5a7a; --line: #dfe1ea;
  --accent: #007a68; --accent-strong: #009881; --accent-soft: #e0f2ef; --navy: #2b2a5b; --on-navy: #ffffff;
  --on-navy-muted: #c9c8e6; --poster: #0f7fa8; --gold: #f5c251; --note-bg: #fdf0cf; --note-fg: #5a4300;
  --display: "Comfortaa", "Trebuchet MS", system-ui, sans-serif;
  --body: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #15142b; --surface: #1e1d3b; --text: #e7e7f2; --muted: #a3a2c2; --line: #2e2d52;
    --accent: #3cc6b0; --accent-strong: #009881; --accent-soft: #173836; --navy: #2b2a5b; --on-navy: #ffffff;
    --on-navy-muted: #c9c8e6; --poster: #5cc3ea; --gold: #f5c251; --note-bg: #3b3216; --note-fg: #f5d47f; color-scheme: dark; }
}
:root[data-theme="dark"] { --bg: #15142b; --surface: #1e1d3b; --text: #e7e7f2; --muted: #a3a2c2; --line: #2e2d52;
  --accent: #3cc6b0; --accent-strong: #009881; --accent-soft: #173836; --navy: #2b2a5b; --on-navy: #ffffff;
  --on-navy-muted: #c9c8e6; --poster: #5cc3ea; --gold: #f5c251; --note-bg: #3b3216; --note-fg: #f5d47f; color-scheme: dark; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 16px/1.55 var(--body); }
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.sample { background: var(--note-bg); color: var(--note-fg); font-size: 13px; padding-block: 6px; }
h1, h2 { font-family: var(--display); font-weight: 700; text-wrap: balance; letter-spacing: -.01em; }
.overview > *, .cards div { min-width: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
header.site { background: var(--navy); border-bottom: 4px solid var(--accent-strong); }
header.site .wrap { display: flex; gap: 16px 24px; align-items: center; justify-content: space-between; padding-block: 12px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; color: var(--on-navy); }
.brand img { height: 40px; width: auto; display: block; }
.brand span { font: 700 15px/1.2 var(--display); color: var(--on-navy); padding-left: 14px; border-left: 1px solid rgba(255,255,255,.25); }
.editions { display: flex; gap: 4px; flex-wrap: wrap; }
.editions a { padding: 4px 10px; border-radius: 999px; text-decoration: none; color: var(--on-navy-muted); font-size: 14px; font-variant-numeric: tabular-nums; }
.editions a:hover { color: var(--on-navy); background: rgba(255,255,255,.1); }
.editions a.on { background: var(--gold); color: var(--navy); font-weight: 700; }
header.site :focus-visible { outline-color: var(--gold); }
main { padding-block: 28px 48px; }
footer { color: var(--muted); font-size: 13px; padding-bottom: 32px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 28px 0 10px; }
h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 16px 0 6px; }
.muted { color: var(--muted); }
.badge { display: inline-block; align-self: flex-start; padding: 1px 8px; border-radius: 999px; background: var(--gold); color: #2b2a5b;
         font: 600 12px/1.6 var(--body); letter-spacing: .02em; vertical-align: middle; }

.intro { max-width: 680px; margin-bottom: 24px; }
.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.cards a { display: flex; gap: 14px; padding: 14px; background: var(--surface); border: 1px solid var(--line);
           border-radius: 10px; text-decoration: none; color: var(--text); height: 100%; }
.cards a:hover { border-color: var(--accent-strong); box-shadow: 0 2px 10px rgba(43,42,91,.12); }
.cards img, .nocover { width: 84px; height: 118px; object-fit: cover; border-radius: 4px; flex: none; }
.nocover { display: grid; place-items: center; background: var(--navy); color: var(--gold); font-family: var(--display); font-weight: 700; font-size: 22px; }
.cards div { display: flex; flex-direction: column; gap: 2px; font-size: 14px; }
.cards strong { font-size: 16px; }

.edhead { display: flex; gap: 20px; align-items: center; margin-bottom: 18px; }
.edhead .cover { width: 92px; border-radius: 4px; box-shadow: 0 1px 4px rgba(0,0,0,.2); }
.kicker { margin: 0 0 4px; color: var(--accent); font-weight: 700; font-size: 14px; letter-spacing: .02em; }
.where { margin: 0; color: var(--muted); }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 20px; overflow-x: auto; }
.tabs a { padding: 10px 16px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap; }
.tabs a.on { color: var(--text); border-bottom-color: var(--accent-strong); font-weight: 600; }

.overview { display: grid; grid-template-columns: 1fr 300px; gap: 32px; }
.overview .text > :first-child { margin-top: 0; }
.topics { columns: 2; padding-left: 18px; }
.facts { background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--accent-strong); border-radius: 10px; padding: 16px 18px; align-self: start; }
.facts dl { margin: 0; }
.facts dt { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-top: 10px; }
.facts dt:first-child { margin-top: 0; }
.facts dd { margin: 2px 0 0; }

.toc { columns: 2; font-size: 14px; padding-left: 22px; }
.session { border-top: 1px solid var(--line); }
.session.poster h2 { color: var(--poster); }
.papers { list-style: none; padding: 0; margin: 0; }
.paper { padding: 9px 0; border-bottom: 1px dashed var(--line); display: grid; grid-template-columns: 1fr; gap: 1px; }
.paper .time { font-size: 13px; font-variant-numeric: tabular-nums; color: var(--muted); font-variant-numeric: tabular-nums; }
.paper .ptitle { font-weight: 600; }
.paper.item .ptitle { font-weight: 400; font-style: italic; color: var(--muted); }
.paper .authors { font-size: 15px; }
.paper .affil { font-size: 13px; color: var(--muted); }
.paper .meta { font-size: 13px; display: flex; gap: 12px; color: var(--muted); }
.filter { width: 100%; max-width: 420px; padding: 9px 12px; font: inherit; border: 1px solid var(--line); border-radius: 8px;
          background: var(--surface); color: var(--text); }
.count { font-size: 13px; font-weight: 400; color: var(--muted); }
.note { margin-top: 24px; font-size: 13px; }
.members { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 4px 24px; }
.members li { padding: 6px 0; border-bottom: 1px dashed var(--line); }
.members span { display: block; font-size: 13px; color: var(--muted); }
.members em { font-size: 13px; color: var(--accent); font-style: normal; }

@media (max-width: 720px) {
  .overview { grid-template-columns: 1fr; }
  .topics, .toc { columns: 1; }
  .edhead { align-items: flex-start; }
  .edhead .cover { width: 64px; }
  h1 { font-size: 22px; }
}