/* Embodied AI Agents, Robotics, and IoT: FLAIRS-40 special track site
   Plain CSS, no build step. Headings and data in IBM Plex Sans, prose in IBM Plex Serif. */

:root {
  --ink: #1c2733;
  --ink-soft: #4a5560;
  --muted: #6b7680;
  --link: #9e5512;
  --link-deep: #7d4210;
  --rule: #d9dee4;
  --band: #f3f5f7;
  --bg: #ffffff;
  --sans: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --measure: 46rem;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
}

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 4rem;
}

/* Skip link and focus */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 0.75rem;
  z-index: 10;
}

.skip-link:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

/* Text defaults */

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover { color: var(--link-deep); }

p { margin: 0 0 1rem; }

ul { margin: 0 0 1rem; padding-left: 1.25rem; }

li { margin: 0 0 0.45rem; }

strong { font-weight: 600; }

h1, h2, h3 {
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.2;
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.1rem;
  line-height: 1.3;
  margin: 1.75rem 0 0.6rem;
}

/* Hero */

.brand-logos {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10rem;
  align-items: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.track-logo {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.conference-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  text-align: center;
}

.conference-brand img {
  display: block;
  width: 100%;
  height: auto;
}

.kicker {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem;
}

.deck {
  font-size: 1.3rem;
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: 36rem;
  margin: 0 0 1.75rem;
}

.facts {
  font-family: var(--sans);
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0 0 0 1rem;
  border-left: 3px solid var(--link);
}

.facts li { margin: 0.2rem 0; }

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  font-family: var(--sans);
  margin: 0;
}

.button {
  display: inline-block;
  background: var(--link);
  color: #fff;
  text-decoration: none;
  padding: 0.65rem 1.1rem;
  border-radius: 3px;
  font-weight: 500;
}

.button:hover, .button:focus-visible {
  background: var(--link-deep);
  color: #fff;
}

/* Section navigation */

nav.sections {
  margin: 2.5rem 0 0;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.95rem;
}

nav.sections ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav.sections li { margin: 0; }

nav.sections a {
  color: var(--ink);
  text-decoration: none;
}

nav.sections a:hover, nav.sections a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* Sections */

section { margin-top: 3rem; }

.topics {
  list-style: disc;
  padding-left: 1.25rem;
  margin: 0 0 1.25rem;
}

.topics li { margin: 0 0 0.45rem; }

/* Dates */

.dates {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  margin: 0 0 1rem;
  background: var(--band);
}

.dates th, .dates td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 0.75rem;
  border-top: 1px solid var(--rule);
}

.dates tr:last-child th, .dates tr:last-child td {
  border-bottom: 1px solid var(--rule);
}

.dates th {
  font-weight: 600;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  width: 11rem;
}

/* People */

.people {
  list-style: none;
  padding: 0;
  margin: 0;
}

.people li { margin: 0 0 1.1rem; }

.people strong { font-family: var(--sans); }

.committee {
  list-style: none;
  padding: 0;
  margin: 0;
  columns: 2;
  column-gap: 2rem;
  font-family: var(--sans);
  font-size: 0.95rem;
}

.committee li {
  break-inside: avoid;
  margin: 0 0 0.5rem;
}

/* Footer */

footer {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
}

footer p { margin: 0; }

/* Small screens */

@media (max-width: 40rem) {
  .page { padding: 2.5rem 1rem 3rem; }
  .brand-logos { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
  .conference-brand { flex-direction: row; justify-self: start; gap: 1rem; text-align: left; }
  .conference-brand img { width: 4.75rem; }
  .committee { columns: 1; }
  .dates th { width: auto; white-space: normal; }
}

/* Print: the page doubles as a flyer */

@media print {
  .skip-link, nav.sections, .actions { display: none; }
  body { font-size: 11pt; }
  a { color: inherit; text-decoration: none; }
  .dates { background: none; }
}