/* next-token theme.
   Tokens ported from the AI for Bioinformatics bootcamp site so this page
   reads as a sibling of the main bootcamp site when they sit side by side. */

:root {
  --ground: #F7F8FB;
  --surface: #FFFFFF;
  --raise: #FFFFFF;
  --ink: #14171E;
  --ink-soft: #3D4453;
  --pencil: #676E7D;
  --pencil-faint: #949BAA;
  --rule: #E1E4EB;
  --rule-strong: #828A9C;
  --pen: #2547A8;
  --pen-bright: #2E58CC;
  --pen-wash: #ECF1FC;
  --keep: #2E6B4F;
  --keep-wash: #EAF3EE;
  --shadow: 0 1px 2px rgba(20,23,30,.04), 0 8px 24px rgba(20,23,30,.06);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  --ground: #0E1015;
  --surface: #151921;
  --raise: #1B202A;
  --ink: #E9EBF0;
  --ink-soft: #C0C6D2;
  --pencil: #99A0AF;
  --pencil-faint: #6F7787;
  --rule: #242935;
  --rule-strong: #6F7787;
  --pen: #8AA6F2;
  --pen-bright: #9DB5F7;
  --pen-wash: #181E2D;
  --keep: #7FBF9E;
  --keep-wash: #16211C;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

body {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.03rem;
  line-height: 1.62;
  margin: 0;
  padding: 0 1.5rem;
  -webkit-font-smoothing: antialiased;
}

/* Presenter mode scales the root, so every rem-sized component in the demo
   cards grows with the prose. This is what the amphitheater actually needs. */
html.presenter { font-size: 19px; }

.wrap { max-width: 66rem; margin: 0 auto; }

.eyebrow {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--pen);
  margin: 0;
}

.subhead {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--pencil);
  margin: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--surface);
  color: var(--pen);
  padding: .6rem 1rem;
  border: 2px solid var(--pen);
  border-radius: 0 0 3px 0;
  font-weight: 600;
}

.skip-link:focus { left: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

kbd {
  font-family: var(--mono);
  font-size: .68rem;
  border: 1px solid var(--rule-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: .05rem .3rem;
  color: var(--pencil);
  background: var(--surface);
}

code {
  font-family: var(--mono);
  font-size: .92em;
  background: var(--pen-wash);
  border-radius: 3px;
  padding: .08em .3em;
}

/* ---------- top bar ---------- */

.topbar {
  border-bottom: 1px solid var(--rule);
  background: var(--ground);
}

.topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand { display: flex; align-items: center; gap: .8rem; min-width: 0; }

.brand-mark {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -.01em;
  color: var(--ink);
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--pencil);
  line-height: 1.4;
}

.theme-toggle {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.3rem; height: 2.3rem;
  padding: 0;
  border: 1px solid var(--rule-strong);
  background: var(--surface);
  color: var(--ink-soft);
  border-radius: 3px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.theme-toggle:hover { border-color: var(--pen); color: var(--pen); }
.theme-toggle:focus-visible { outline: 2px solid var(--pen); outline-offset: 2px; }
.theme-toggle svg { width: 1.05rem; height: 1.05rem; display: block; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }

/* ---------- layout: rail + content ---------- */

.layout {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
  padding-top: 1.5rem;
}

.rail {
  position: sticky;
  top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .9rem;
  padding: 1.25rem 0 2rem;
  max-height: calc(100vh - 3rem);
  overflow: auto;
}

.rail-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: .1rem;
}

.rail-list a {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  text-decoration: none;
  color: var(--pencil);
  font-size: .84rem;
  line-height: 1.35;
  padding: .32rem .5rem;
  border-radius: 3px;
  border-left: 2px solid transparent;
  transition: color .12s ease, background .12s ease;
}

.rail-list a:hover { color: var(--ink); background: var(--pen-wash); }
.rail-list a:focus-visible { outline: 2px solid var(--pen); outline-offset: 2px; }

.rail-num {
  font-family: var(--mono);
  font-size: .62rem;
  color: var(--pencil);
}

.rail-list a.is-active {
  color: var(--pen);
  border-left-color: var(--pen);
  background: var(--pen-wash);
}

.rail-list a.is-active .rail-num { color: var(--pen); }

.rail-tools {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.rail-hint {
  margin: 0;
  font-size: .72rem;
  color: var(--pencil);
  line-height: 1.5;
}

.rail-tools .chip { align-self: flex-start; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  padding: .35rem .6rem;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.chip:hover { border-color: var(--pen); color: var(--pen); }
.chip:focus-visible { outline: 2px solid var(--pen); outline-offset: 2px; }

.chip[aria-pressed="true"] {
  color: var(--keep);
  border-color: var(--keep);
  background: var(--keep-wash);
}

/* ---------- hero ---------- */

.hero { padding: 3rem 0 3.5rem; }

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.3rem, 5.5vw, 3.7rem);
  line-height: 1.05;
  letter-spacing: -.021em;
  font-weight: 600;
  text-wrap: balance;
  margin: 1.2rem 0 0;
  max-width: 22ch;
}

.hero .deck {
  font-family: var(--serif);
  font-size: clamp(1.08rem, 2vw, 1.32rem);
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 42rem;
  margin: 1.4rem 0 0;
}

.hero-meta {
  font-size: .92rem;
  color: var(--pencil);
  max-width: 42rem;
  margin: 1.3rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule);
}

/* ---------- beats ---------- */

.beat {
  padding: 3.5rem 0;
  border-top: 1px solid var(--rule);
  scroll-margin-top: 2rem;
}

.beat h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  font-weight: 600;
  letter-spacing: -.014em;
  line-height: 1.15;
  margin: .6rem 0 0;
  text-wrap: balance;
  max-width: 30ch;
}

.beat p {
  max-width: 40rem;
  color: var(--ink-soft);
  margin: 1.1rem 0 0;
}

.beat p strong { color: var(--ink); }

.predict {
  font-family: var(--serif);
  font-style: italic;
  color: var(--pen);
  margin: 1.4rem 0 0 !important;
  max-width: 40rem !important;
}

.takeaway {
  margin: 2.2rem 0 0;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--keep);
  background: var(--keep-wash);
  border-radius: 0 4px 4px 0;
  padding: 1.2rem 1.4rem;
  max-width: 48rem;
}

.takeaway .subhead { display: block; margin-bottom: .35rem; }

.takeaway p { margin: 0 !important; max-width: none !important; color: var(--ink) !important; font-size: 1.02rem; }
.takeaway strong { color: var(--keep); }

/* ---------- demo cards ---------- */

.demo {
  margin-top: 1.8rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 1.6rem 1.6rem 1.4rem;
  max-width: 48rem;
}

.demo-lede {
  margin: 0 0 1.1rem !important;
  font-size: .98rem;
}

.demo-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem;
}

.demo-form-column {
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.demo-form input[type="text"] {
  flex: 1 1 18rem;
  min-width: 0;
  font-family: var(--mono);
  font-size: .9rem;
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  padding: .65rem .8rem;
}

.demo-form input[type="text"]:focus-visible {
  outline: 2px solid var(--pen);
  outline-offset: 1px;
  border-color: var(--pen);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: var(--pen);
  color: #fff;
  border: none;
  text-decoration: none;
  font-weight: 600;
  font-size: .93rem;
  font-family: var(--sans);
  padding: .7rem 1.4rem;
  border-radius: 3px;
  cursor: pointer;
  transition: background .15s ease, transform .15s ease;
}

:root[data-theme="dark"] .btn { color: #0E1015; }
.btn:hover { background: var(--pen-bright); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--pen); outline-offset: 3px; }

.demo-out {
  margin-top: 1.1rem;
  min-height: 3.2rem;
}

/* Reserve each result's real height so the first interaction never shoves
   the caption down the screen mid-lecture. */
#continue-out  { min-height: 6.5rem; }
#roll-out      { min-height: 12.5rem; }
#tokenize-out  { min-height: 10rem; }
#training-out  { min-height: 13rem; }

.demo-out.is-loading { opacity: .55; }

.demo-caption {
  margin: 1.1rem 0 0 !important;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: .88rem;
  color: var(--pencil) !important;
  max-width: 44rem !important;
}

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--rule);
  padding: 1.75rem 0 3rem;
  margin-top: 3rem;
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .05em;
  color: var(--pencil);
}

.foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 2rem;
}

/* ---------- responsive ---------- */

@media (max-width: 52rem) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .rail {
    position: static;
    max-height: none;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 1rem;
    border-bottom: 1px solid var(--rule);
    padding-bottom: 1.25rem;
  }
  .rail-list { flex-direction: row; flex-wrap: wrap; gap: .25rem .5rem; }
  .rail-tools { margin: 0; padding: 0; border: none; flex-direction: row; align-items: center; }
  .rail-hint { display: none; }
  .hero { padding: 2.2rem 0 2.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---------- presenter mode: role-level minimums for the amphitheater ----------
   The root bump alone scales tiny things to still-tiny, so the roles the room
   must read get explicit floors. */

html.presenter .rail-list a { font-size: 1.05rem; }
html.presenter .chip { font-size: .8rem; padding: .5rem .8rem; }
html.presenter .demo-form .chip { font-size: .95rem; }
html.presenter .demo-lede { font-size: 1.12rem; }
html.presenter .demo-caption { font-size: 1.02rem; }
html.presenter .demo-note { font-size: .95rem; }
html.presenter .bar-pct, html.presenter .loss-bits { font-size: 1rem; }
html.presenter .beat-table th, html.presenter .beat-table td { font-size: 1rem; }
html.presenter .tok-id { font-size: .85rem; }
html.presenter .cite-text { font-size: 1.05rem; }
html.presenter .quiz-prompt { font-size: 1.08rem; }
html.presenter .quiz-verdict, html.presenter .cite-verdict { font-size: .98rem; }
html.presenter .temp-readout { font-size: 1.1rem; }
html.presenter .cloud-label { font-size: 17px; }