:root {
  --bg: #070708;
  --lime: #56fd5a;
  --text: #f4f4f5;
  --muted: #a39eb2;
  --cream: #f4f1e8;
  --ink: #121212;
  --line: rgba(86, 253, 90, 0.35);
  --max: 880px;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  overflow-x: clip;
}

body {
  margin: 0;
  padding-top: calc(4.2rem + env(safe-area-inset-top));
  background: var(--bg);
  color: var(--text);
  font-family: Geist, "Segoe UI", sans-serif;
  font-size: 1.05rem;
  line-height: 1.45;
}

a { color: var(--lime); }

a:focus-visible,
.register:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.top,
main,
footer {
  width: min(var(--max), calc(100% - 3rem));
  margin-inline: auto;
}

.top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  width: 100%;
  max-width: none;
  margin: 0;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  padding: calc(0.7rem + env(safe-area-inset-top)) max(1rem, calc((100% - var(--max)) / 2)) 0.7rem;
  background: var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.wordmark {
  margin: 0;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.top-actions {
  display: flex;
  flex-flow: row nowrap;
  flex-shrink: 0;
  align-items: center;
  gap: 0.15rem;
}

.icon-link {
  display: inline-flex;
  flex: 0 0 2rem;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  overflow: hidden;
  color: var(--text);
}

.icon-link svg {
  display: block;
  width: 18px;
  height: 18px;
  max-width: 18px;
  max-height: 18px;
}

.icon-link:hover,
.icon-link:focus-visible {
  color: var(--lime);
}

.top-actions .register { margin-left: 0.45rem; }

.register {
  display: inline-block;
  background: var(--lime);
  color: #071208;
  font-weight: 700;
  text-decoration: none;
  padding: 0.55rem 0.85rem;
}

.register.large { padding: 0.85rem 1.15rem; }

.hero {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 1.5rem;
  align-items: end;
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--line);
}

.kicker,
.facts {
  color: var(--muted);
  margin: 0;
}

.kicker {
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0.35rem 0 0.8rem;
  font-size: clamp(3.2rem, 8vw, 5.6rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.92;
}

.lede {
  margin: 0;
  max-width: 38rem;
  font-size: 1.2rem;
}

.lede + .lede { margin-top: 0.85rem; }

.facts {
  margin-top: 1rem;
}

.facts span { color: var(--lime); padding: 0 0.35rem; }

.calendar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.8rem;
  align-items: baseline;
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero .register { margin-top: 1.4rem; }

.yolo {
  width: 180px;
  height: auto;
  justify-self: end;
  animation: yolo-drift linear both;
  animation-timeline: scroll();
  animation-range: 0 70vh;
}

.expect,
.schedule { padding: 3rem 0 0.5rem; }

h2 {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.expect li {
  padding: 0.85rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.session {
  display: grid;
  grid-template-columns: 8.6rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.4rem 0;
  border-top: 1px solid var(--line);
}

.session-head {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  gap: 0.65rem;
}

.portraits {
  display: flex;
  flex-flow: row nowrap;
  flex-shrink: 0;
  gap: 0.28rem;
  align-items: center;
}

.format {
  margin: 0 0 0.15rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.session.marker h3,
.session.tbd h3 {
  font-size: 1.25rem;
  color: var(--muted);
  letter-spacing: 0.14em;
}

.when {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-weight: 600;
}

.portrait {
  width: 32px;
  height: 32px;
  object-fit: cover;
  object-position: center 22%;
  border-radius: 50%;
  border: 2px solid var(--lime);
  background: #141416;
}

.session-copy h3 {
  margin: 0;
  min-width: 0;
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}

.role {
  margin: 0.2rem 0 0.7rem;
  color: var(--muted);
}

.talk {
  margin: 0.2rem 0 0;
  padding-left: 0.75rem;
  border-left: 3px solid var(--lime);
  font-size: 1.2rem;
  font-weight: 700;
}

.abstract {
  margin: 0.7rem 0 0;
  color: var(--text);
  interpolate-size: allow-keywords;
}

.abstract summary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  list-style: none;
}

.abstract summary::-webkit-details-marker { display: none; }

.abstract summary::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-0.1rem) rotate(45deg);
  transition: transform 0.32s ease;
}

.abstract[open] summary {
  color: var(--lime);
}

.abstract[open] summary::after {
  transform: translateY(0.1rem) rotate(225deg);
}

.abstract::details-content {
  height: 0;
  overflow: clip;
  opacity: 0;
  transition: height 0.32s ease, opacity 0.32s ease, content-visibility 0.32s allow-discrete;
}

.abstract[open]::details-content {
  height: auto;
  opacity: 1;
}

.abstract p {
  margin: 0.55rem 0 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.45;
}

.session-link,
.extra { margin: 0.45rem 0 0; }

.extra span {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.empty { color: var(--muted); }

.cream {
  width: 100vw;
  margin-top: 3rem;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  overflow: hidden;
  background: var(--cream);
  color: var(--ink);
}

.cream p {
  width: min(var(--max), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.2rem 0;
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.95;
  animation: cream-drift linear both;
  animation-timeline: view();
  animation-range: entry 0% cover 40%;
}

.place {
  position: relative;
  overflow: hidden;
  width: 100vw;
  margin-top: 0;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  min-height: 460px;
  display: flex;
  align-items: flex-end;
  background: #070708;
}

.place::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -18%;
  bottom: -18%;
  background:
    linear-gradient(90deg, rgba(7, 7, 8, 0.82), rgba(7, 7, 8, 0.35)),
    url("assets/sky-slc.jpg") center / cover no-repeat;
  animation: place-drift linear both;
  animation-timeline: view();
  animation-range: cover 0% cover 100%;
}

.place-copy {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3rem 0;
}

@keyframes yolo-drift {
  to { transform: translateY(72px) rotate(-7deg); }
}

@keyframes cream-drift {
  from { transform: translateY(36px); }
  to { transform: translateY(0); }
}

@keyframes place-drift {
  from { transform: translateY(-8%); }
  to { transform: translateY(8%); }
}

@media (prefers-reduced-motion: reduce) {
  .yolo,
  .cream p,
  .place::before { animation: none; }
  .abstract summary::after,
  .abstract::details-content { transition: none; }
}

.place h2 { color: var(--text); }

.place p { margin: 0.2rem 0; font-size: 1.35rem; font-weight: 600; }

.party {
  max-width: 36rem;
  margin-top: 1rem !important;
  color: var(--muted);
  font-size: 1rem !important;
  font-weight: 400 !important;
}

footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

footer p { margin: 0.3rem 0; }

@media (max-width: 720px) {
  body { padding-top: calc(5.6rem + env(safe-area-inset-top)); }
  .top {
    flex-wrap: wrap;
    row-gap: 0.35rem;
    padding-inline: 0.85rem;
    padding-bottom: 0.55rem;
    gap: 0.35rem;
  }
  .wordmark {
    flex: 1 0 100%;
    letter-spacing: 0.12em;
    font-size: 0.72rem;
  }
  .top-actions { width: 100%; justify-content: flex-end; }
  .icon-link { flex-basis: 1.85rem; width: 1.85rem; height: 1.85rem; }
  .icon-link svg { width: 16px; height: 16px; max-width: 16px; max-height: 16px; }
  .top-actions .register {
    margin-left: 0.2rem;
    padding: 0.45rem 0.65rem;
    font-size: 0.85rem;
  }
  h1 { font-size: 2.5rem; }
  .lede { font-size: 1.05rem; }
  .hero { grid-template-columns: 1fr; padding: 1.6rem 0 2rem; gap: 1.25rem; }
  .yolo {
    width: 112px;
    justify-self: start;
    animation: none;
  }
  .expect,
  .schedule { padding-top: 2.2rem; }
  .expect li { font-size: 1.05rem; }
  .session { grid-template-columns: 1fr; gap: 0.35rem; padding: 1.15rem 0; }
  .when { margin: 0; font-size: 0.85rem; }
  .session-head { align-items: center; }
  .session-copy h3 { font-size: 1.35rem; }
  .portrait { width: 28px; height: 28px; }
  .talk { font-size: 1.05rem; }
  .cream p { font-size: 2.15rem; padding: 2.2rem 0; }
  .place { min-height: 0; }
  .place p { font-size: 1.15rem; }
  .place-copy { padding: 2.2rem 0; }
  .calendar { gap: 0.45rem 0.7rem; }
  .calendar a { padding: 0.15rem 0; }
  .lede,
  .expect li,
  .talk,
  .party,
  .facts { overflow-wrap: break-word; }
}

@media (max-width: 380px) {
  .wordmark { letter-spacing: 0.08em; font-size: 0.66rem; }
  .icon-link { flex-basis: 1.6rem; width: 1.6rem; height: 1.6rem; }
  .top-actions .register { padding: 0.4rem 0.5rem; font-size: 0.78rem; }
  .session-copy h3 { font-size: 1.2rem; }
  .calendar .cal-label { flex-basis: 100%; }
}