:root {
  --ink: #111827;
  --lime: #c6f54a;
  --paper: #f5f5f0;
  --muted: #adb6c3;
  --line: #ffffff29;
  --blue: #3659e3;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 100px; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
a, button, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 7px;
}

.wrap { width: min(1320px, 100% - 96px); margin: auto; }

.skip {
  position: fixed;
  top: -100px;
  left: 20px;
  padding: 15px;
  background: var(--lime);
  color: var(--ink);
  z-index: 50;
}
.skip:focus { top: 10px; }

.header { border-bottom: 1px solid var(--line); }

.nav {
  height: 105px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand { display: block; width: 227px; line-height: 0; }
.brand svg { width: 100%; height: auto; }

.links { display: flex; align-items: center; gap: 36px; font-size: 14px; }
.links a:hover { color: var(--lime); }

.nav-cta { border: 1px solid rgb(130, 145, 78); padding: 11px 18px; }
.nav-cta span { margin-left: 20px; }

.menu {
  display: none;
  color: var(--paper);
  background: none;
  border: 1px solid var(--line);
  padding: 9px 14px;
}

.eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 15px;
}
.eyebrow::before { content: "["; color: var(--lime); font: 24px "Space Grotesk"; }
.eyebrow::after { content: "]"; color: var(--lime); font: 24px "Space Grotesk"; }

.hero { padding: 62px 0 0; position: relative; overflow: hidden; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  align-items: center;
  gap: 25px;
  padding: 28px 0 56px;
}

h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-family: "Space Grotesk", Arial, sans-serif; }

h1 {
  font-size: clamp(64px, 7.4vw, 112px);
  line-height: 0.98;
  font-weight: 600;
  letter-spacing: -0.065em;
}
h1 em { font-style: normal; color: var(--lime); }

.hero-copy {
  max-width: 530px;
  margin: 29px 0 31px;
  font-size: 18px;
  line-height: 1.7;
  color: rgb(204, 209, 217);
}

.actions { display: flex; align-items: center; gap: 30px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
  background: var(--lime);
  color: var(--ink);
  padding: 17px 22px;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.2s, transform 0.2s;
}
.btn:hover { background: rgb(217, 255, 122); transform: translateY(-2px); }

.text-link {
  font-size: 14px;
  border-bottom: 1px solid rgb(132, 144, 158);
  padding-bottom: 4px;
}
.text-link:hover { border-color: var(--lime); }

.hero-art {
  aspect-ratio: 1 / 1;
  position: relative;
  display: grid;
  place-items: center;
}
.hero-art::before {
  content: "";
  position: absolute;
  inset: 6%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.027) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.027) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(black, transparent 73%);
}
.graphic { width: 100%; position: relative; overflow: visible; }
.art-caption {
  position: absolute;
  bottom: 8%;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.hero-bottom {
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid var(--line);
  padding: 23px 0 25px;
  font-size: 13px;
  color: rgb(171, 181, 195);
}
.hero-bottom strong { color: var(--paper); font-weight: 500; }

.ribbon {
  background: var(--lime);
  color: var(--ink);
  padding: 16px 0;
  font-family: "Space Grotesk";
  font-weight: 600;
  font-size: 17px;
}
.ribbon .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.ribbon span:nth-child(2n) { font-size: 22px; font-weight: 400; }

.section { padding: 105px 0; }
.light { background: var(--paper); color: var(--ink); }

.section-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  gap: 23px;
  align-items: center;
  margin-bottom: 35px;
}
.section-label .num { color: rgb(118, 128, 140); }

.intro-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 110px; align-items: start; }

h2 {
  font-size: clamp(38px, 4.1vw, 60px);
  line-height: 1.08;
  font-weight: 500;
  letter-spacing: -0.055em;
}

.intro-text { font-size: 18px; line-height: 1.8; color: rgb(81, 91, 104); padding-top: 8px; }
.intro-text p + p { margin-top: 20px; }

.underlined { position: relative; white-space: nowrap; }
.underlined::after {
  content: "";
  display: block;
  position: absolute;
  height: 6px;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--lime);
  z-index: 0;
}
.underlined span { position: relative; z-index: 1; }

.section-head { display: flex; justify-content: space-between; align-items: end; gap: 45px; margin-bottom: 50px; }
.section-head > p { max-width: 315px; color: var(--muted); font-size: 15px; }

.topic { border-top: 1px solid var(--line); }
.topic:last-child { border-bottom: 1px solid var(--line); }

.topic summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 70px 1fr 230px 30px;
  align-items: center;
  gap: 24px;
  padding: 30px 0;
}
.topic summary::-webkit-details-marker { display: none; }

.topic-num { font-size: 13px; color: var(--lime); }
.topic h3 { font-size: 30px; font-weight: 500; letter-spacing: -0.025em; }
.topic-tag { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.plus { font-size: 27px; color: var(--lime); line-height: 1; text-align: center; }
.topic[open] .plus { transform: rotate(45deg); }
.topic summary:hover h3 { color: var(--lime); }

.topic-body { max-width: 700px; padding: 0 0 32px 94px; color: rgb(189, 198, 210); }
.topic-body p { font-size: 16px; }

.speaker { display: flex; align-items: center; gap: 18px; margin-top: 24px; }
.speaker-photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: rgba(198, 245, 74, 0.08);
  border: 1px solid var(--line);
  overflow: hidden;
}
.speaker-photo svg { width: 26px; height: 26px; fill: none; stroke: var(--muted); stroke-width: 2.5; }
.speaker-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.speaker-info { min-width: 0; }
.speaker-name { font-size: 15px; font-weight: 500; color: var(--paper); }
.speaker-role { font-size: 13px; color: var(--muted); margin-top: 3px; }

.roundtable-note { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.format-tag { display: block; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--lime); margin-bottom: 9px; }
.roundtable-note p { font-size: 15px; }


.program-note { margin-top: 27px; font-size: 13px; color: var(--muted); }

.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 55px;
  border-top: 1px solid rgba(17, 24, 39, 0.17);
}
.audience-card { padding: 40px 60px 5px 0; }
.audience-card + div {
  border-left: 1px solid rgba(17, 24, 39, 0.17);
  padding-left: 60px;
  padding-right: 0;
}
.audience-card h3 { font-size: 29px; font-weight: 500; letter-spacing: -0.04em; margin: 15px 0 17px; }
.audience-card p { color: rgb(81, 91, 104); max-width: 470px; }
.small-check { width: 38px; height: 32px; stroke: var(--ink); fill: none; stroke-width: 5; }
.audience-card .label {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.info-intro p { color: var(--muted); max-width: 400px; margin-top: 25px; }

.info-details { display: flex; flex-direction: column; gap: 40px; }

.facts { border-top: 1px solid var(--line); }
.fact {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  border-bottom: 1px solid var(--line);
  padding: 21px 0;
  font-size: 15px;
}
.fact dt { color: var(--muted); }
.fact dd { margin: 0; text-align: right; }
.fact dd a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255, 255, 255, 0.35);
  transition: color 0.2s, text-decoration-color 0.2s;
}
.fact dd a:hover { color: var(--lime); text-decoration-color: var(--lime); }

.signup-form { margin-top: 32px; max-width: 420px; }

.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgb(118, 128, 140);
  margin-bottom: 9px;
}
.field input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(17, 24, 39, 0.3);
  background: none;
  padding: 10px 2px;
  font: inherit;
  font-size: 16px;
  color: var(--ink);
}
.field input::placeholder { color: rgb(118, 128, 140); }
.field input:focus { outline: none; border-color: var(--ink); }
.field.invalid input { border-color: rgb(200, 60, 60); }

.signup-form .btn {
  border: 0;
  cursor: pointer;
  margin-top: 6px;
}

.form-note { margin-top: 18px; font-size: 14px; min-height: 1.4em; }
.form-note[data-state="success"] { color: rgb(58, 129, 58); }
.form-note[data-state="error"] { color: rgb(178, 52, 52); }

.schedule-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.schedule { border-top: 1px solid var(--line); }
.schedule-item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
  font-size: 13px;
}
.schedule-item .time { width: 46px; flex-shrink: 0; color: var(--lime); font-variant-numeric: tabular-nums; font-weight: 600; }
.schedule-item .what { color: rgb(189, 198, 210); }

.closing { padding: 70px 0; background: var(--lime); color: var(--ink); }
.closing .wrap { display: flex; justify-content: space-between; gap: 40px; align-items: center; }
.closing h2 { font-size: clamp(36px, 4.6vw, 68px); max-width: 800px; }
.bracket-check { width: 170px; flex-shrink: 0; }

.photos-section { padding-top: 70px; padding-bottom: 90px; }
.photos-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
.photos-label { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

.slider-nav { display: flex; gap: 10px; }
.slider-btn {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: none;
  color: var(--paper);
  font-size: 16px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.slider-btn:hover { border-color: var(--lime); color: var(--lime); }

.slider {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 0 48px;
}
.slider::-webkit-scrollbar { display: none; }

.slide {
  flex: 0 0 auto;
  display: block;
  width: min(640px, 78vw);
  height: auto;
}

.faq { border-top: 1px solid var(--line); }
.faq-q { border-bottom: 1px solid var(--line); }
.faq-q summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 26px 0;
}
.faq-q summary::-webkit-details-marker { display: none; }
.faq-q summary h3 { font-size: 20px; font-weight: 500; letter-spacing: -0.01em; }
.faq-q summary:hover h3 { color: var(--lime); }
.faq-q .plus { font-size: 24px; color: var(--lime); line-height: 1; flex-shrink: 0; }
.faq-q[open] .plus { transform: rotate(45deg); }
.faq-a { padding: 0 0 26px; max-width: 700px; color: rgb(189, 198, 210); }
.faq-a p { font-size: 16px; }

.footer { padding: 40px 0; }
.footer-row { display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.footer .brand { width: 195px; }
.footer p { font-size: 12px; color: var(--muted); }
.back { font-size: 13px; }
.back:hover { color: var(--lime); }

.sponsors {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 12px;
}
.sponsors-label { color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }
.sponsor-names { color: var(--paper); font-weight: 500; }

@media (min-width: 1500px) {
  .hero-grid { padding-bottom: 72px; }
}

@media (max-width: 1000px) {
  .wrap { width: calc(100% - 56px); }
  .hero-grid { grid-template-columns: 1.3fr 1fr; }
  .hero-art { min-width: 0; }
  h1 { font-size: 72px; }
  .links { gap: 20px; }
  .intro-grid { gap: 50px; }
  .topic summary { grid-template-columns: 40px 1fr 170px 25px; }
  .topic h3 { font-size: 25px; }
  .topic-body { padding-left: 64px; }
  .info-grid { gap: 45px; }
  .section { padding: 80px 0; }
  .slider { padding: 0 28px; }
}

@media (max-width: 900px) {
  .nav { height: 86px; flex-wrap: wrap; position: relative; }
  .brand { width: 195px; }
  .menu { display: block; }
  .links {
    display: none;
    width: 100%;
    position: absolute;
    left: 0;
    top: 85px;
    background: var(--ink);
    border: 1px solid var(--line);
    padding: 22px;
    z-index: 10;
    flex-direction: column;
    align-items: stretch;
    gap: 23px;
  }
  .links.open { display: flex; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 25px; }
  .wrap { width: calc(100% - 40px); }
  .hero { padding-top: 32px; }
  .eyebrow { font-size: 11px; letter-spacing: 0.09em; gap: 10px; }
  .hero-grid { grid-template-columns: 1fr; padding: 29px 0 25px; gap: 0; }
  h1 { font-size: clamp(58px, 11.7vw, 82px); }
  .hero-copy { font-size: 16px; max-width: 500px; margin-top: 25px; }
  .actions { gap: 22px; }
  .hero-art { width: 200px; justify-self: end; margin-top: 10px; margin-bottom: -3px; }
  .art-caption { display: none; }
  .hero-bottom { gap: 17px; font-size: 12px; flex-direction: column; padding-top: 18px; }
  .ribbon { padding: 13px 0; }
  .ribbon .wrap { gap: 9px; font-size: 12px; }
  .ribbon span:nth-child(2n) { font-size: 16px; }
  .photos-section { padding-top: 48px; padding-bottom: 64px; }
  .slider { padding: 0 20px; gap: 14px; }
  .section { padding: 64px 0; }
  .section-label { margin-bottom: 28px; }
  .intro-grid, .info-grid { grid-template-columns: 1fr; gap: 27px; }
  .intro-text { font-size: 16px; }
  .section-head { display: block; margin-bottom: 30px; }
  .section-head > p { margin-top: 25px; max-width: 100%; font-size: 14px; }
  .topic summary { grid-template-columns: 28px 1fr 25px; gap: 14px; padding: 23px 0; }
  .topic h3 { font-size: 23px; line-height: 1.2; }
  .topic-tag { display: none; }
  .topic-body { padding-left: 42px; }
  .audience-grid { grid-template-columns: 1fr; margin-top: 32px; }
  .audience-card { padding: 30px 0; }
  .audience-card + div {
    padding: 30px 0 0;
    border-left: 0;
    border-top: 1px solid rgba(17, 24, 39, 0.17);
  }
  .audience-card h3 { font-size: 27px; }
  .info-grid { gap: 20px; }
  .closing { padding: 48px 0; }
  .closing .wrap { align-items: start; gap: 22px; }
  .bracket-check { width: 80px; margin-top: 8px; }
  .closing h2 { font-size: 36px; }
  .footer-row { flex-wrap: wrap; align-items: start; }
  .footer p { order: 3; flex-basis: 100%; margin-top: 12px; }
  .footer .brand { width: 170px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}