/* AI show and tell — madrid.aishowandtell.org. No webfonts, no third-party anything. */

:root {
  --bg:      #0c0c0f;
  --surface: #15161b;
  --surface-2:#1c1e25;
  --line:    #272a33;
  --text:    #ececf0;
  --muted:   #a0a3ad;
  --faint:   #70737c;
  --accent:  #f3b53f;
  --accent-d:#c98f21;
  --ink:     #1a1205;
  --gut: 1.5rem;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem; line-height: 1.66; -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
.wrap { max-width: 42rem; margin-inline: auto; padding-inline: var(--gut); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.022em; margin: 0; font-weight: 650; }
h1 { font-size: clamp(2rem, 7vw, 2.9rem); text-wrap: balance; }
h2 { font-size: 1.25rem; margin: 2.8rem 0 0.8rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1.05rem; }
p:last-child { margin-bottom: 0; }
.lede { font-size: clamp(1.0625rem, 2.2vw, 1.22rem); color: var(--muted); }
.muted { color: var(--muted); }
.eyebrow {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 0.9rem;
}

/* header */
.site-head { border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; gap: 1rem; min-height: 4.25rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text);
  font-weight: 650; letter-spacing: -0.02em; margin-right: auto; }
.brand:hover { text-decoration: none; color: var(--accent); }
.brand img { width: 28px; height: 28px; display: block; flex: none; }
.langs { display: flex; gap: 0.2rem; background: var(--surface); border: 1px solid var(--line);
  border-radius: 8px; padding: 0.18rem; }
.langs a { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; color: var(--muted);
  border-radius: 6px; padding: 0.4rem 0.55rem; line-height: 1; }
.langs a:hover { color: var(--text); text-decoration: none; }
.langs a[aria-current="page"] { background: var(--accent); color: var(--ink); }

main { padding-block: 2.8rem 0; }

/* buttons */
.btn { display: inline-block; padding: 0.8rem 1.4rem; border-radius: 0.5rem;
  font-size: 0.95rem; font-weight: 600; border: 1px solid transparent; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--ink); }
.btn-primary:hover { background: var(--accent-d); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.4rem; }

/* fact cards */
.facts { display: grid; gap: 0.7rem; margin: 1.6rem 0 0; padding: 0; list-style: none; }
.facts li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 0.85rem 1rem; display: grid; gap: 0.15rem; }
.facts b { font-size: 0.95rem; }
.facts span { font-size: 0.93rem; color: var(--muted); }

.callout { border-left: 3px solid var(--accent-d); background: var(--surface);
  border-radius: 0 10px 10px 0; padding: 0.85rem 1rem; margin: 1.2rem 0 0;
  font-size: 0.93rem; color: var(--muted); }

.cta-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 1.7rem 1.4rem; margin: 2.8rem 0 1.4rem; text-align: center; }
.cta-card h3 { margin-bottom: 0.5rem; }
.cta-card p { color: var(--muted); font-size: 0.95rem; margin: 0 auto; max-width: 38ch; }
.cta-card .btn-row { justify-content: center; }

/* event list on the series page */
.events { display: grid; gap: 0.9rem; margin-top: 1.6rem; padding: 0; list-style: none; }
.events li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.events a { display: grid; gap: 0.2rem; padding: 1.1rem 1.2rem; color: var(--text); }
.events a:hover { text-decoration: none; border-color: var(--accent); }
.events .when { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.events .what { font-weight: 650; font-size: 1.05rem; }
.events .where { font-size: 0.9rem; color: var(--muted); }

/* footer */
.site-foot { border-top: 1px solid var(--line); margin-top: 3.5rem; padding-block: 2.2rem 3rem;
  color: var(--faint); font-size: 0.875rem; }
.site-foot .sponsor { display: block; margin-bottom: 0.7rem; color: var(--muted); }
.site-foot .sponsor a { color: var(--text); }
.site-foot .legal { display: block; margin-bottom: 0.6rem; }
.site-foot nav { display: flex; gap: 1.2rem; flex-wrap: wrap; }
.site-foot a { color: var(--faint); }
.site-foot a:hover { color: var(--text); }

/* legal pages */
.doc h1 { font-size: clamp(1.7rem, 4.5vw, 2.3rem); margin-bottom: 0.4rem; }
.doc .updated { color: var(--muted); font-size: 0.875rem; margin-bottom: 2.6rem; }
.doc h2 { font-size: 1.18rem; }
.doc p, .doc li { color: var(--muted); }
.doc strong { color: var(--text); }
.doc ul { padding-left: 1.2rem; }
.doc li { margin-bottom: 0.4rem; }
.doc dl { display: grid; gap: 0.5rem 1.5rem; margin: 0; }
@media (min-width: 40rem) { .doc dl { grid-template-columns: 11rem 1fr; } }
.doc dt { color: var(--text); font-weight: 500; }
.doc dd { margin: 0; color: var(--muted); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 0.25rem; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--gut); top: 0.5rem; background: var(--accent); color: var(--ink);
  padding: 0.5rem 0.9rem; border-radius: 0.375rem; z-index: 50; }

/* event poster + talk cards */
.hero-img { margin: 1.9rem 0 0; }
.hero-img img { width: 100%; height: auto; display: block; border-radius: 14px;
  border: 1px solid var(--line); background: var(--surface); }
.talks { list-style: none; padding: 0; display: grid; gap: 1rem; margin: 1.5rem 0 0; }
.talks li { background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 1.1rem 1.2rem; }
.talks .title { display: block; font-weight: 650; font-size: 1.05rem; margin-bottom: 0.2rem; }
.talks .by { margin: 0 0 0.55rem; font-size: 0.93rem; color: var(--muted); }
.talks .desc { margin: 0; font-size: 0.93rem; color: var(--muted); }
.lang-note { display: inline-block; margin-top: 0.9rem; padding: 0.35rem 0.7rem;
  border: 1px solid var(--accent-d); border-radius: 999px; font-size: 0.8rem;
  color: var(--accent); }

/* collapsible talk details — native <details>, no script */
.talks details { margin-top: 0.6rem; }
.talks summary { cursor: pointer; color: var(--accent); font-size: 0.88rem; font-weight: 600;
  list-style: none; display: inline-flex; align-items: center; gap: 0.35rem; }
.talks summary::-webkit-details-marker { display: none; }
.talks summary::after { content: "\25be"; font-size: 0.8em; transition: transform 0.15s ease; }
.talks details[open] summary::after { transform: rotate(180deg); }
.talks details .desc { margin-top: 0.6rem; }
.btn-row.top { margin-top: 1.5rem; }

/* poster beside the intro + booking button; stacks on narrow screens */
.split { display: grid; gap: 1.4rem; margin-top: 1.9rem; align-items: start; }
@media (min-width: 38rem) { .split { grid-template-columns: 1fr 1fr; gap: 1.8rem; } }
.split .hero-img { margin: 0; }
.split-text > p { margin-bottom: 1.1rem; }
.split-text .btn-row { margin-top: 0; }