:root {
  --ink: #11110f;
  --paper: #f6f4ee;
  --white: #fff;
  --muted: #6c6a63;
  --rule: rgba(17, 17, 15, 0.16);
  --blue: #244dff;
  --red: #ff432e;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Instrument Sans", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }

.topline {
  height: 31px;
  padding: 0 2.4vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--ink);
  color: var(--paper);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.live-dot { display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--red); margin-right:8px; animation:pulse 2s infinite; }
@keyframes pulse { 50% { opacity:.35; } }

.site-header {
  height: 74px;
  padding: 0 2.4vw;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--rule);
  position: relative;
  z-index: 10;
}
.brand { font-family: var(--serif); font-size: 21px; line-height: 1; justify-self:start; }
.brand sup { font-family: var(--sans); font-size: 8px; margin-left: 4px; vertical-align: top; }
nav { display: flex; gap: 29px; font-size: 12px; }
nav a { transition: opacity .2s ease; }
nav a:hover { opacity: .48; }
.site-header > .pill { justify-self:end; }

.pill {
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 9px 17px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.pill:hover { transform: translateY(-2px); }
.pill-dark { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.pill-dark:hover { background: var(--blue); border-color: var(--blue); }
.pill-light { background: var(--paper); }
.pill-light:hover { background: var(--white); }
.pill-large { padding: 13px 22px; font-size: 13px; }

.section-pad { padding-left: 6.5vw; padding-right: 6.5vw; }
.hero { min-height: calc(100vh - 105px); padding-top: 64px; text-align: center; overflow:hidden; }
.eyebrow, .section-number, .kicker {
  font-size: 10px;
  line-height: 1;
  letter-spacing: .16em;
  font-weight: 650;
  text-transform: uppercase;
}
.hero h1 {
  margin: 24px auto 18px;
  max-width: 980px;
  font-family: var(--serif);
  font-size: clamp(68px, 8.25vw, 125px);
  font-weight: 400;
  line-height: .84;
  letter-spacing: -.045em;
}
.hero h1 em, .final-cta h2 em { font-weight:400; color:var(--blue); }
.hero-copy { max-width: 510px; margin: 0 auto; font-size: 16px; line-height: 1.48; }
.hero-actions { display:flex; justify-content:center; gap:8px; margin-top:25px; }
.invite-note { margin:12px 0 0; color:var(--muted); font-size:11px; }

.photo-stage { height: 450px; max-width: 1080px; margin: 30px auto -8px; position:relative; }
.blueprint { position:absolute; inset: 42px -15vw -1px; opacity:.13; background-image:linear-gradient(var(--blue) 1px, transparent 1px),linear-gradient(90deg,var(--blue) 1px,transparent 1px); background-size:38px 38px; mask-image:linear-gradient(to bottom,transparent,#000 22%,#000 85%,transparent); }
.polaroid { position:absolute; width:245px; height:356px; margin:0; padding:12px 12px 31px; background:#fff; box-shadow:0 9px 25px rgba(0,0,0,.13); transition:transform .35s ease; }
.polaroid:hover { z-index:5; transform:rotate(0deg) translateY(-10px); }
.polaroid .crop { width:100%; height:100%; background-image:url("./assets/hackathon-builders.jpg"); background-size:760px 507px; filter:saturate(.85) contrast(1.04); }
.polaroid figcaption { position:absolute; bottom:8px; left:12px; font-size:8px; letter-spacing:.12em; }
.p1 { left:7%; top:43px; transform:rotate(-4deg); }
.p2 { left:29%; top:7px; transform:rotate(2.5deg); }
.p3 { right:27%; top:37px; transform:rotate(-2deg); }
.p4 { right:5%; top:13px; transform:rotate(3.5deg); }
.crop-1 { background-position: 5% 48%; }
.crop-2 { background-position: 35% 48%; }
.crop-3 { background-position: 67% 48%; }
.crop-4 { background-position: 96% 48%; }

.ticker { overflow:hidden; border-block:1px solid var(--rule); background:#eceae4; }
.ticker > div { width:max-content; padding:13px 0; display:flex; align-items:center; gap:25px; animation:marquee 32s linear infinite; font-size:11px; letter-spacing:.08em; white-space:nowrap; }
.ticker i { color:var(--red); font-style:normal; }
@keyframes marquee { to { transform:translateX(-50%); } }

.section-number { padding-top: 24px; border-top:1px solid var(--rule); }
.brief { padding-top:120px; padding-bottom:130px; background:var(--white); }
.brief-grid { display:grid; grid-template-columns:1.1fr .9fr; gap:10vw; padding-top:64px; }
.brief h2, .schedule h2, .partners h2, .faq h2, .final-cta h2, .prize h2 {
  margin:0;
  font-family:var(--serif);
  font-size:clamp(53px,6vw,92px);
  font-weight:400;
  line-height:.94;
  letter-spacing:-.04em;
}
.brief-copy { max-width:545px; padding-top:10px; font-size:16px; line-height:1.55; }
.brief-copy .lead { font-family:var(--serif); font-size:28px; line-height:1.2; margin-top:0; }
.signature { margin-top:42px; font-family:var(--serif); font-style:italic; font-size:20px; transform:rotate(-2deg); }
.signature span { font-size:28px; }
.proof-strip { margin-top:110px; display:grid; grid-template-columns:repeat(4,1fr); border-block:1px solid var(--rule); }
.proof-strip div { padding:35px 20px 31px; border-right:1px solid var(--rule); display:flex; align-items:baseline; gap:12px; }
.proof-strip div:last-child { border-right:0; }
.proof-strip strong { font-family:var(--serif); font-size:72px; font-weight:400; line-height:1; }
.proof-strip span { font-size:11px; text-transform:uppercase; letter-spacing:.1em; }

.schedule { padding-top:120px; padding-bottom:130px; }
.section-heading-row { display:flex; justify-content:space-between; align-items:flex-end; gap:30px; padding:64px 0 60px; }
.section-heading-row > p { width:300px; margin:0; font-size:13px; line-height:1.55; }
.days { display:grid; grid-template-columns:repeat(3,1fr); border:1px solid var(--rule); }
.day { min-width:0; border-right:1px solid var(--rule); }
.day:last-child { border-right:0; }
.day header { padding:25px 25px 23px; border-bottom:1px solid var(--rule); }
.day header span { font-size:10px; letter-spacing:.14em; }
.day h3 { margin:35px 0 0; font-family:var(--serif); font-size:42px; font-weight:400; }
.day ol { list-style:none; margin:0; padding:0; }
.day li { min-height:86px; padding:18px 20px; display:grid; grid-template-columns:54px 1fr; gap:14px; border-bottom:1px solid var(--rule); }
.day li:last-child { border-bottom:0; }
.day time { font-variant-numeric:tabular-nums; color:var(--muted); font-size:10px; padding-top:3px; }
.day strong { display:block; font-size:13px; margin-bottom:5px; }
.day li span { display:block; color:var(--muted); font-size:11px; line-height:1.45; }
.day.featured header { background:var(--blue); color:#fff; }
.day .deadline { background:var(--ink); color:var(--paper); }
.day .deadline time, .day .deadline span { color:#c8c6be; }

.prize { padding-top:120px; padding-bottom:130px; background:var(--ink); color:var(--paper); }
.section-number.light { border-color:rgba(255,255,255,.24); }
.prize-layout { display:grid; grid-template-columns:.95fr 1.05fr; gap:9vw; padding-top:65px; }
.prize-layout > div:first-child > p { max-width:500px; font-size:17px; line-height:1.55; }
.prize-layout .fine-print { color:#8d8c86; font-size:10px !important; max-width:420px !important; margin-top:40px; }
.criteria { border-top:1px solid rgba(255,255,255,.25); }
.criteria > div { display:grid; grid-template-columns:42px 130px 1fr; gap:20px; align-items:start; padding:25px 0; border-bottom:1px solid rgba(255,255,255,.25); }
.criteria span { color:#777670; font-size:10px; }
.criteria strong { font-family:var(--serif); font-size:28px; font-weight:400; }
.criteria p { margin:4px 0 0; color:#aaa8a1; font-size:12px; line-height:1.5; }

.partners { padding-top:120px; padding-bottom:130px; background:var(--white); }
.partners h2 { padding:64px 0 70px; }
.partner-grid { display:grid; grid-template-columns:repeat(2,1fr); border:1px solid var(--rule); }
.partner { min-height:280px; padding:28px; display:flex; flex-direction:column; justify-content:space-between; border-right:1px solid var(--rule); border-bottom:1px solid var(--rule); }
.partner:nth-child(2n) { border-right:0; }
.partner:nth-child(n+3) { border-bottom:0; }
.partner-label { font-size:9px; letter-spacing:.14em; color:var(--muted); }
.partner strong { align-self:center; font-size:60px; line-height:1; }
.partner p { margin:0; font-size:11px; color:var(--muted); }
.partner-logo { display:block; align-self:center; width:auto; height:auto; object-fit:contain; }
.logo-a16z { width:205px; max-height:72px; }
.logo-yc { width:70px; height:70px; }
.logo-zfellows { width:225px; }
.yc-lockup { align-self:center; display:flex; align-items:center; gap:16px; }
.yc-lockup span { font-size:29px; font-weight:600; letter-spacing:-.055em; }
.partner .turnstone { font-family:var(--sans); font-size:49px; font-weight:500; letter-spacing:-.07em; }

.faq { padding-top:120px; padding-bottom:130px; }
.faq-layout { display:grid; grid-template-columns:.8fr 1.2fr; gap:9vw; padding-top:64px; }
.faq-list { border-top:1px solid var(--rule); }
.faq details { border-bottom:1px solid var(--rule); }
.faq summary { list-style:none; display:flex; justify-content:space-between; align-items:center; cursor:pointer; padding:23px 0; font-size:15px; font-weight:600; }
.faq summary::-webkit-details-marker { display:none; }
.faq summary span { font-size:23px; font-weight:400; transition:transform .2s ease; }
.faq details[open] summary span { transform:rotate(45deg); }
.faq details p { max-width:650px; margin:-5px 40px 25px 0; color:var(--muted); font-size:13px; line-height:1.55; }

.final-cta { padding-top:130px; padding-bottom:135px; text-align:center; background:var(--blue); color:#fff; }
.final-cta h2 { margin:28px 0 24px; font-size:clamp(67px,8vw,122px); line-height:.86; }
.final-cta h2 em { color:#fff; text-decoration:underline; text-decoration-thickness:3px; text-underline-offset:9px; }
.final-cta p { font-size:14px; line-height:1.5; }
.final-cta .pill { margin-top:17px; background:#fff; border-color:#fff; color:var(--ink); }
.final-cta .pill:hover { background:var(--ink); color:#fff; }
.text-button { display:block; margin:20px auto 0; border:0; background:transparent; color:#fff; text-decoration:underline; cursor:pointer; font-size:11px; }

footer { padding:55px 6.5vw 35px; display:grid; grid-template-columns:2fr .7fr .7fr 1fr; gap:55px; background:var(--white); }
footer > div { display:flex; flex-direction:column; align-items:flex-start; gap:9px; font-size:11px; }
.footer-brand { font-size:29px; }
footer p { max-width:180px; margin:8px 0 0; color:var(--muted); line-height:1.4; }
footer div > span { margin-bottom:7px; color:var(--muted); font-size:9px; letter-spacing:.12em; }
.link-button { padding:0; border:0; background:transparent; cursor:pointer; font-size:11px; }
.footer-meta { align-items:flex-end; justify-content:space-between; text-align:right; }
.footer-meta small { font-size:8px; color:var(--muted); }

.apply-dialog { width:min(760px,calc(100vw - 24px)); max-height:calc(100vh - 24px); padding:0; border:0; background:transparent; overflow:auto; }
.apply-dialog::backdrop { background:rgba(15,15,13,.72); backdrop-filter:blur(5px); }
.dialog-shell { position:relative; padding:47px 50px 50px; background:var(--paper); }
.close-dialog { position:absolute; top:17px; right:20px; width:32px; height:32px; border:1px solid var(--rule); border-radius:50%; background:transparent; cursor:pointer; font-size:22px; line-height:1; }
.dialog-index { font-size:9px; letter-spacing:.16em; }
.dialog-shell h2 { margin:22px 0 10px; font-family:var(--serif); font-size:66px; font-weight:400; line-height:1; letter-spacing:-.04em; }
.dialog-shell > p { max-width:530px; color:var(--muted); font-size:13px; line-height:1.5; }
form { margin-top:30px; }
.website-field { position:absolute; left:-10000px; width:1px; height:1px; overflow:hidden; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:15px; }
label { display:block; margin-bottom:17px; font-size:10px; font-weight:600; letter-spacing:.05em; text-transform:uppercase; }
input, textarea, select { width:100%; margin-top:8px; padding:13px 0; border:0; border-bottom:1px solid #aaa89f; border-radius:0; background:transparent; outline:none; color:var(--ink); }
textarea { min-height:92px; resize:vertical; }
input:focus, textarea:focus, select:focus { border-color:var(--blue); }
.check { display:flex; align-items:center; gap:9px; text-transform:none; font-size:11px; letter-spacing:0; font-weight:400; }
.check input { width:auto; margin:0; }
form .submit-application { width:100%; margin-top:10px; }
form .submit-application:disabled { opacity:.55; cursor:wait; transform:none; }
form small { display:block; margin-top:12px; color:var(--muted); text-align:center; font-size:9px; }
.success-state { padding:50px 0 10px; text-align:center; }
.success-mark { display:grid; width:64px; height:64px; margin:auto; place-items:center; border-radius:50%; background:var(--blue); color:#fff; font-size:28px; }
.success-state h3 { margin:24px 0 8px; font-family:var(--serif); font-size:52px; font-weight:400; }
.success-state p { max-width:430px; margin:0 auto 25px; color:var(--muted); font-size:13px; }
.toast { position:fixed; left:50%; bottom:22px; z-index:100; transform:translate(-50%,120px); padding:13px 19px; border-radius:999px; background:var(--ink); color:#fff; font-size:11px; transition:transform .35s ease; }
.toast.show { transform:translate(-50%,0); }

@media (max-width: 900px) {
  .site-header { grid-template-columns:1fr auto; }
  .site-header nav { display:none; }
  .hero { padding-top:55px; }
  .photo-stage { height:380px; transform:scale(.85); transform-origin:top center; margin-bottom:-45px; }
  .polaroid { width:225px; height:325px; }
  .p1 { left:2%; } .p2 { left:24%; } .p3 { right:23%; } .p4 { right:1%; }
  .brief-grid, .prize-layout, .faq-layout { grid-template-columns:1fr; }
  .brief-copy { margin-left:auto; }
  .days { grid-template-columns:1fr; }
  .day { border-right:0; border-bottom:1px solid var(--rule); }
  .day:last-child { border-bottom:0; }
  .day ol { display:grid; grid-template-columns:1fr 1fr; }
  .day li:nth-child(odd) { border-right:1px solid var(--rule); }
  .section-heading-row { align-items:flex-start; flex-direction:column; }
  footer { grid-template-columns:2fr 1fr 1fr; }
  .footer-meta { grid-column:1/-1; flex-direction:row; align-items:flex-end; }
}

@media (max-width: 600px) {
  .topline { padding:0 17px; font-size:8px; }
  .site-header { height:64px; padding:0 17px; }
  .brand { font-size:18px; }
  .site-header .pill { padding:8px 13px; font-size:9px; }
  .section-pad { padding-left:20px; padding-right:20px; }
  .hero { min-height:auto; padding-top:49px; }
  .eyebrow { font-size:8px; }
  .hero h1 { margin-top:20px; font-size:57px; line-height:.88; }
  .hero-copy { max-width:340px; font-size:13px; }
  .hero-actions { flex-direction:column; width:100%; max-width:260px; margin:22px auto 0; }
  .invite-note { font-size:9px; }
  .photo-stage { height:440px; width:calc(100vw - 18px); margin-top:28px; transform:none; }
  .blueprint { inset:25px -20px 0; }
  .polaroid { width:44vw; height:205px; padding:7px 7px 23px; }
  .polaroid .crop { background-size:460px 307px; }
  .polaroid figcaption { left:7px; bottom:6px; font-size:6px; }
  .p1 { left:2%; top:16px; transform:rotate(-3deg); }
  .p2 { left:auto; right:4%; top:1px; transform:rotate(2deg); }
  .p3 { left:4%; right:auto; top:211px; transform:rotate(2.5deg); }
  .p4 { right:2%; top:203px; transform:rotate(-2deg); }
  .crop-1 { background-position: 2% 45%; }
  .crop-2 { background-position: 35% 45%; }
  .crop-3 { background-position: 67% 45%; }
  .crop-4 { background-position: 98% 45%; }
  .brief, .schedule, .prize, .partners, .faq { padding-top:80px; padding-bottom:85px; }
  .section-number { padding-top:17px; font-size:8px; }
  .brief-grid, .faq-layout, .prize-layout { padding-top:38px; gap:45px; }
  .brief h2, .schedule h2, .partners h2, .faq h2, .prize h2 { font-size:51px; }
  .brief-copy, .prize-layout > div:first-child > p { font-size:14px; }
  .brief-copy .lead { font-size:23px; }
  .proof-strip { grid-template-columns:1fr 1fr; margin-top:70px; }
  .proof-strip div:nth-child(2) { border-right:0; }
  .proof-strip div:nth-child(-n+2) { border-bottom:1px solid var(--rule); }
  .proof-strip strong { font-size:58px; }
  .section-heading-row { padding:38px 0; }
  .section-heading-row > p { width:auto; }
  .day ol { display:block; }
  .day li:nth-child(odd) { border-right:0; }
  .criteria > div { grid-template-columns:30px 95px 1fr; gap:10px; }
  .criteria strong { font-size:23px; }
  .partner-grid { grid-template-columns:1fr; }
  .partner { min-height:210px; border-right:0; border-bottom:1px solid var(--rule) !important; }
  .partner:last-child { border-bottom:0 !important; }
  .partner strong { font-size:49px; }
  .logo-a16z { width:185px; }
  .logo-yc { width:60px; height:60px; }
  .logo-zfellows { width:205px; }
  .yc-lockup span { font-size:25px; }
  .partner .turnstone { font-size:41px; }
  .partners h2 { padding:38px 0 50px; }
  .final-cta { padding-top:90px; padding-bottom:90px; }
  .final-cta h2 { font-size:59px; }
  footer { grid-template-columns:1fr 1fr; gap:40px 25px; padding:43px 20px 28px; }
  footer > div:first-child, .footer-meta { grid-column:1/-1; }
  .footer-meta { margin-top:10px; }
  .dialog-shell { padding:40px 22px 30px; }
  .dialog-shell h2 { font-size:50px; }
  .form-row { grid-template-columns:1fr; gap:0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; }
}