:root {
  --ink: #14263a;
  --ink-soft: #4c6172;
  --navy: #10283e;
  --navy-deep: #091a2a;
  --teal: #1b8891;
  --teal-light: #d8eff0;
  --gold: #e5a63b;
  --cream: #f7f3eb;
  --paper: #fffdf9;
  --line: #d7e0e4;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(15, 41, 61, 0.09);
  --radius: 22px;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "DM Sans", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}
a { color: inherit; }
img { max-width: 100%; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.narrow { max-width: 1040px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 100; padding: 10px 16px; background: var(--white); border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  color: var(--navy);
  background: rgba(255, 253, 249, 0.94);
  border-bottom: 1px solid rgba(20, 38, 58, 0.1);
  backdrop-filter: blur(14px);
}
.header-inner { width: min(calc(100% - 40px), 1240px); min-height: 76px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; text-decoration: none; line-height: 1.05; }
.brand small { display: block; margin-top: 4px; color: var(--ink-soft); font-size: 0.64rem; font-weight: 700; letter-spacing: 0.08em; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; color: var(--white); background: linear-gradient(135deg, var(--teal), var(--navy)); font-family: "Newsreader", serif; font-size: 1.6rem; }
.site-nav { display: flex; align-items: center; gap: 25px; }
.site-nav a { position: relative; font-size: 0.89rem; font-weight: 700; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--teal); transition: right 160ms ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 9px; border: 0; background: transparent; }
.nav-toggle span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: var(--navy); }

.hero { position: relative; overflow: hidden; min-height: 690px; color: var(--white); background: radial-gradient(circle at 80% 15%, rgba(43, 177, 182, 0.28), transparent 34%), linear-gradient(120deg, var(--navy-deep), var(--navy) 60%, #184e5c); }
.hero::after { content: ""; position: absolute; right: -120px; bottom: -240px; width: 620px; height: 620px; border: 1px solid rgba(255,255,255,.16); border-radius: 50%; box-shadow: 0 0 0 75px rgba(255,255,255,.035), 0 0 0 150px rgba(255,255,255,.025); }
.hero-grid { position: absolute; inset: 0; opacity: .25; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to right, black, transparent 78%); }
.hero-content { position: relative; z-index: 1; padding: 105px 0 80px; }
.eyebrow, .section-label { color: var(--teal); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }
.hero .eyebrow { color: #7ad6d8; }
.hero h1 { max-width: 900px; margin: 18px 0 26px; font-family: "Newsreader", serif; font-size: clamp(3.3rem, 7.3vw, 6.9rem); line-height: 0.91; letter-spacing: -0.045em; }
.hero h1 span { color: #78d2d5; }
.hero-copy { max-width: 760px; margin: 0; color: #d9e6ea; font-size: clamp(1.06rem, 2vw, 1.32rem); }
.event-facts { display: flex; flex-wrap: wrap; gap: 0; margin: 45px 0 36px; }
.event-facts div { min-width: 205px; padding: 2px 34px 2px 0; margin-right: 34px; border-right: 1px solid rgba(255,255,255,.25); }
.event-facts div:last-child { border-right: 0; }
.event-facts strong, .event-facts span { display: block; }
.event-facts strong { font-size: 1rem; }
.event-facts span { margin-top: 2px; color: #b8cbd2; font-size: 0.82rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 800; text-decoration: none; }
.button-primary { color: var(--navy); background: var(--gold); }
.button-secondary { border: 1px solid rgba(255,255,255,.4); color: var(--white); }
.announcement { padding: 14px 0; color: var(--navy); background: var(--teal-light); font-size: 0.91rem; text-align: center; }

.section { padding: 105px 0; }
.section-tint { background: var(--cream); }
.section-dark { color: var(--white); background: var(--navy-deep); }
.section h2 { max-width: 800px; margin: 13px 0 38px; font-family: "Newsreader", serif; font-size: clamp(2.15rem, 3.5vw, 3.35rem); line-height: 1.05; letter-spacing: -0.025em; }
.section-dark .section-label { color: #6fd1d3; }
.lead-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; color: var(--ink-soft); font-size: 1.07rem; }
.lead-grid p { margin: 0; }
.questions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 58px; }
.questions article { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.questions span { color: var(--teal); font-family: "Newsreader", serif; font-size: 2rem; font-weight: 700; }
.questions h3 { margin: 10px 0 8px; }
.questions p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; overflow: hidden; border: 1px solid #d9d4c9; border-radius: var(--radius); background: #d9d4c9; }
.topic-grid div { position: relative; min-height: 125px; padding: 30px 28px 25px 48px; background: var(--paper); font-weight: 700; }
.topic-grid div::before { content: ""; position: absolute; left: 28px; top: 38px; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.section-heading-row { display: grid; grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr); align-items: end; gap: 50px; margin-bottom: 40px; }
.section-heading-row h2 { margin-bottom: 0; }
.section-heading-row > p { margin: 0; color: var(--ink-soft); }
.section-dark .section-heading-row > p { color: #b8cbd2; }

.people-grid { display: grid; gap: 22px; }
.speakers-grid { grid-template-columns: repeat(3, 1fr); }
.organizers-grid { grid-template-columns: repeat(3, 1fr); }
.person-card { padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.speaker-card { display: flex; min-height: 355px; flex-direction: column; }
.avatar { display: grid; flex: 0 0 auto; place-items: center; width: 58px; height: 58px; border-radius: 18px; color: var(--white); background: linear-gradient(145deg, var(--teal), var(--navy)); font-family: "Newsreader", serif; font-size: 1.3rem; font-weight: 700; }
.avatar-large { width: 98px; height: 98px; margin-bottom: 25px; border-radius: 50%; font-size: 2rem; }
.avatar-small { width: 48px; height: 48px; border-radius: 15px; font-size: 1rem; }
.person-meta h3, .committee-card h3 { margin: 0 0 5px; font-size: 1.08rem; line-height: 1.25; }
.person-title, .person-affiliation, .person-role, .person-topic, .person-bio { margin: 0; }
.person-title { color: var(--ink-soft); font-size: 0.82rem; }
.person-affiliation { color: var(--teal); font-size: 0.86rem; font-weight: 800; }
.person-links { display: flex; gap: 8px; margin-top: 13px; }
.person-links a { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink-soft); text-decoration: none; transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease; }
.person-links a:hover, .person-links a:focus-visible { border-color: var(--teal); color: var(--teal); background: var(--teal-light); }
.person-links .material-symbols-rounded { font-size: 19px; line-height: 1; }
.person-topic { margin-top: 20px; padding-top: 22px; color: var(--ink-soft); font-size: 0.9rem; border-top: 1px solid var(--line); }
.compact-card { display: grid; grid-template-columns: 58px 1fr; gap: 16px; }
.person-role { color: var(--gold); font-size: 0.76rem; font-weight: 800; text-transform: uppercase; }
.person-bio { grid-column: 1 / -1; color: var(--ink-soft); font-size: 0.88rem; }

.track-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.track-grid article { padding: 35px; border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius); background: rgba(255,255,255,.055); }
.track-number { color: #74d4d6; font-size: 0.78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.track-grid h3 { margin: 18px 0 12px; font-family: "Newsreader", serif; font-size: 1.75rem; }
.track-grid p { margin: 0; color: #c1d0d5; }
.submission-note { margin-top: 24px; padding: 20px 24px; border-left: 4px solid var(--gold); color: #dbe7ea; background: rgba(255,255,255,.055); }
.timeline { border-top: 1px solid var(--line); }
.timeline-item { display: grid; grid-template-columns: minmax(210px, .7fr) 1.3fr; gap: 32px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.timeline-item time { color: var(--teal); font-weight: 800; }
.timeline-item p { margin: 0; }
.small-note { color: var(--ink-soft); font-size: .85rem; }
.program-list { border-top: 1px solid #d9d4c9; }
.program-item { display: grid; grid-template-columns: 48px 1fr 90px; align-items: center; gap: 22px; padding: 24px 0; border-bottom: 1px solid #d9d4c9; }
.program-item > span { color: var(--teal); font-family: "Newsreader", serif; font-size: 1.7rem; font-weight: 700; }
.program-item h3, .program-item p { margin: 0; }
.program-item p { color: var(--ink-soft); font-size: .88rem; }
.program-item time { justify-self: end; color: var(--ink-soft); font-size: .82rem; font-weight: 800; }
.committee-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.committee-card { display: flex; align-items: center; gap: 14px; padding: 17px; border: 1px solid #d9d4c9; border-radius: 18px; background: var(--white); }
.committee-card p { margin: 0; color: var(--ink-soft); font-size: .82rem; }
.contact-section { color: var(--white); background: linear-gradient(115deg, var(--navy), #1d6570); }
.contact-section .section-label { color: #79d6d8; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 60px; }
.contact-inner h2 { margin-bottom: 0; }
.contact-inner p { color: #c7d9de; }
.contact-link { display: inline-block; color: var(--white); font-size: clamp(1.35rem, 3vw, 2.2rem); font-weight: 800; text-underline-offset: 7px; }
.site-footer { padding: 27px 0; color: #aebfc5; background: #071522; font-size: .8rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; }
.site-footer p { margin: 0; }
.site-footer a { color: var(--white); }

@media (min-width: 1180px) {
  .speakers-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
  .speaker-card { min-height: 430px; padding: 20px; }
  .speaker-card .avatar-large { width: 84px; height: 84px; margin-bottom: 22px; font-size: 1.75rem; }
  .speaker-card .person-meta { display: flex; min-height: 128px; flex-direction: column; }
  .speaker-card .person-links { margin-top: auto; }
  .speaker-card .person-meta h3 { font-size: 1rem; }
  .speaker-card .person-affiliation { font-size: 0.79rem; }
  .speaker-card .person-topic { font-size: 0.82rem; }
}

@media (max-width: 1040px) {
  .site-nav { position: absolute; left: 20px; right: 20px; top: 68px; display: none; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper); box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
  .nav-toggle { display: block; }
  .organizers-grid, .committee-grid, .topic-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .container { width: min(calc(100% - 28px), var(--container)); }
  .header-inner { width: calc(100% - 28px); }
  .hero { min-height: 0; }
  .hero-content { padding: 76px 0 62px; }
  .hero h1 { font-size: clamp(3rem, 16vw, 5rem); }
  .event-facts { display: grid; gap: 17px; }
  .event-facts div { padding: 0; margin: 0; border: 0; }
  .section { padding: 76px 0; }
  .lead-grid, .section-heading-row, .track-grid, .contact-inner { grid-template-columns: 1fr; gap: 24px; }
  .questions, .topic-grid, .speakers-grid, .organizers-grid, .committee-grid { grid-template-columns: 1fr; }
  .speaker-card { min-height: 320px; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
  .program-item { grid-template-columns: 38px 1fr; }
  .program-item time { display: none; }
  .footer-inner { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}