/* Catalyst Hackathon
   Layout: a hacker-facing event page (index), the registration form, and the
   sponsorship prospectus (sponsor). Night Shift theme (dark, see bottom of file) over a base of cream pages, an orange cover-style hero
   with the ink "track" (the Catalyst arc, scaled up) and an ink facts band;
   mono labels, italic Poppins display, DM Sans for reading. */
:root {
  color-scheme: light;
  --orange: #FF6B00;        /* brand field */
  --orange-deep: #A94100;   /* orange text on cream */
  --ink: #1A1512;           /* type, track, bands */
  --ink-soft: #645A54;      /* secondary text */
  --cream: #FFFAF6;         /* page */
  --tint: #FFEFE2;          /* soft orange wash */
  --line: #E6D9CE;          /* hairlines on cream */
  --line-strong: #BFB1A6;   /* input borders */
  --white: #FFFFFF;
  --error: #B42318;

  --f-display: "Poppins", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --f-body: "DM Sans", "Helvetica Neue", Arial, system-ui, sans-serif;
  --f-mono: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 4px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.6;
  font-optical-sizing: auto;
}
img, svg { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 50; background: var(--ink); color: var(--cream); padding: 10px 14px; border-radius: var(--radius); }
.skip:focus { top: 12px; }

/* ---------- type ---------- */
.eyebrow {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-deep);
}
.eyebrow--ink { color: var(--ink); }
.display {
  margin: 0;
  font-family: var(--f-display);
  font-style: italic;
  font-weight: 700;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.rule-head {
  display: flex; align-items: center; gap: 20px;
  margin: 0 0 28px;
  font-family: var(--f-display); font-style: italic; font-weight: 700;
  font-size: clamp(22px, 2.6vw, 28px); line-height: 1.2; letter-spacing: -0.01em;
}
.rule-head::after { content: ""; flex: 1; height: 2px; background: var(--ink); }
.lead { margin: 22px 0 0; max-width: 62ch; font-size: clamp(18px, 1.6vw, 20px); line-height: 1.6; }
.mono { font-family: var(--f-mono); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 12px 24px;
  border: 2px solid var(--ink); border-radius: var(--radius);
  font-family: var(--f-display); font-weight: 600; font-size: 16px; line-height: 1;
  text-decoration: none; cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, color .15s ease;
}
.btn--ink { background: var(--ink); color: var(--cream); }
.btn--ink:hover { background: #000; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--cream); }
.btn .arrow { font-family: var(--f-mono); font-weight: 500; }
.btn .arrow-out { font-family: var(--f-body); font-weight: 500; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--cream);
  border-top: 4px solid var(--orange);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-family: var(--f-mono); font-size: 13px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; white-space: nowrap; }
.brand svg { width: 44px; height: auto; aspect-ratio: 1799 / 272; fill: var(--orange); flex: none; }
.brand img { display: block; width: auto; height: 22px; }
.nav { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 28px); }
.nav a:not(.btn) { font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none; color: var(--ink-soft); }
.nav a:not(.btn):hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.nav .btn { min-height: 40px; padding: 10px 18px; font-size: 15px; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 28px); }
.nav-toggle { display: none; }
.mlh-badge-slot:empty { display: none; }
/* home: the bar stays off-screen over the cover and slides in once the cover has scrolled away (site.js toggles .is-shown) */
.js .topbar--reveal { position: fixed; left: 0; right: 0; transform: translateY(-100%); visibility: hidden; transition: transform .25s ease, visibility 0s .25s; }
.js .topbar--reveal.is-shown { transform: none; visibility: visible; transition: transform .25s ease; }
.section[id] { scroll-margin-top: 69px; }
@media (max-width: 760px) {
  .topbar .wrap { position: relative; }
  .nav { gap: 10px; }
  .nav-toggle { display: inline-grid; place-items: center; order: 2; width: 40px; height: 40px; padding: 0; background: transparent; border: 2px solid var(--ink); border-radius: var(--radius); cursor: pointer; }
  .nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after { display: block; width: 18px; height: 2px; background: var(--ink); transition: transform .2s ease, background-color .2s ease; }
  .nav-toggle-bars { position: relative; }
  .nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-bars::before { top: -6px; }
  .nav-toggle-bars::after { top: 6px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 4px var(--gutter) 12px; background: var(--cream); border-bottom: 2px solid var(--ink); }
  .nav-links.is-open { display: flex; }
  .nav .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
  .nav .nav-links a:last-child { border-bottom: 0; }
}
@media (max-width: 440px) {
  .brand { gap: 8px; font-size: 11px; letter-spacing: 0.08em; }
  .brand img { height: 14px; }
  .brand svg { width: 32px; }
}

/* ---------- hero (cover) ---------- */
/* cover = hero + facts strip, sized so the facts strip lands on the bottom edge of the first screen */
.cover { display: flex; flex-direction: column; min-height: 100svh; }
.hero {
  flex: 1 0 auto;
  position: relative; overflow: hidden;
  background: var(--orange);
  --track-h: min(18.4vw, 21svh, 300px);
  padding-block: clamp(24px, 5.5svh, 64px) calc(var(--track-h) + clamp(16px, 2.4svh, 28px));
}
.hero-copy { position: relative; z-index: 1; max-width: 820px; }
@media (min-width: 900px) {
  .hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: start; gap: 40px; }
  .hero .countdown { margin: 0; }
}
.hero-title { margin: 0; max-width: min(820px, 80svh); }
.hero-title img { display: block; width: 100%; height: auto; }
.hero-tag {
  margin: clamp(12px, 2.4svh, 30px) 0 0;
  font-family: var(--f-display); font-style: italic; font-weight: 700;
  font-size: clamp(22px, min(3vw, 4.4svh), 34px); line-height: 1.15; letter-spacing: -0.015em;
}
.hero-ctas { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; margin-top: clamp(14px, 2.8svh, 30px); }
.facts { background: var(--ink); color: var(--white); padding-block: clamp(16px, 2.6svh, 44px); }
.facts dl { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px 28px; margin: 0; }
.facts dt { font-family: var(--f-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--orange); }
.facts dd { margin: 8px 0 0; font-family: var(--f-display); font-weight: 600; font-size: clamp(17px, 1.7vw, 20px); line-height: 1.3; }
@media (max-width: 860px) { .facts dl { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- sections ---------- */
.section { padding-block: clamp(64px, 9vw, 120px); }
.section + .section { padding-top: 0; }
.section-head { margin-bottom: clamp(40px, 5vw, 64px); }
.section-intro { margin: -10px 0 28px; max-width: 62ch; color: var(--ink-soft); }

/* by the numbers */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 14px; margin: 0; padding: 0; list-style: none; }
.stats li { padding-top: 16px; border-top: 4px solid var(--orange); }
.stat-num { display: block; font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: clamp(36px, 7vw, 84px); line-height: .95; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.stat-label { display: block; margin-top: 10px; font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); }

/* judging */
.after { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 8px 24px; align-items: baseline; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); }
.after .eyebrow { margin: 0; }
.after p { margin: 0; }
@media (max-width: 560px) { .after { grid-template-columns: minmax(0, 1fr); } }

/* FAQ */
.faq-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 56px; align-items: start; }
@media (max-width: 860px) { .faq-cols { grid-template-columns: minmax(0, 1fr); } }
.faq { max-width: 820px; }
.faq a, .faq-more a { color: var(--orange-deep); font-weight: 500; text-underline-offset: 3px; }
.faq-more { margin: 28px 0 0; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 20px 0; cursor: pointer; list-style: none;
  font-family: var(--f-display); font-weight: 600; font-size: clamp(18px, 1.8vw, 20px); line-height: 1.35;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--f-mono); font-size: 22px; font-weight: 400; color: var(--orange-deep); flex: none; transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 22px; max-width: 64ch; }

/* sponsors */
.sponsors { background: var(--tint); }
.section.sponsors { padding-block: clamp(56px, 7vw, 88px); }
.sponsor-wall { display: grid; gap: 14px; margin: 0 0 36px; }
.sponsor-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.sponsor-slot { display: grid; place-content: center; justify-items: center; gap: 4px; min-height: 140px; padding: 16px 12px; text-align: center; text-decoration: none; background: var(--cream); border: 2px dashed var(--line-strong); transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease; }
.sponsor-slot:hover { border-style: solid; border-color: var(--ink); transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--orange); }
.sponsor-slot img { display: block; width: auto; height: auto; max-width: 80%; max-height: 72px; }
.sponsor-slot--filled { border-style: solid; border-color: var(--line); }
.sponsor-row--sm .sponsor-slot { min-height: 96px; }
.slot-tier { font-family: var(--f-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--orange-deep); }
.slot-text { font-family: var(--f-display); font-weight: 600; font-size: clamp(14px, 1.8vw, 18px); line-height: 1.25; color: var(--ink-soft); }
.sponsor-row--sm .slot-text { font-size: clamp(13px, 1.5vw, 15px); }
.sponsor-strip { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 24px 56px; align-items: center; }
.sponsor-strip p { margin: 0; max-width: 52ch; font-size: clamp(18px, 1.6vw, 20px); }
.sponsor-ask { display: grid; gap: 14px; justify-items: start; padding: 22px 24px; background: var(--cream); border: 2px solid var(--ink); }
.sponsor-ask strong { font-family: var(--f-display); font-style: italic; font-weight: 700; font-size: 22px; line-height: 1.2; }
@media (max-width: 860px) { .sponsor-strip { grid-template-columns: minmax(0, 1fr); } }
.sponsors .section-head { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 24px 56px; align-items: end; }
.sponsors .section-head p { margin: 0; }
@media (max-width: 860px) { .sponsors .section-head { grid-template-columns: minmax(0, 1fr); } }
.sponsors .section-head--stack { display: block; margin-bottom: 28px; }
.sponsors .section-head--stack .display { margin: 0 0 16px; }
.sponsors .section-head--stack p:last-child { max-width: 62ch; }
.extras { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin: 0 0 44px; padding: 0; list-style: none; }
.extras strong { display: block; font-family: var(--f-display); font-weight: 600; font-size: 17px; }
.extras span { font-size: 15px; color: var(--ink-soft); }
@media (max-width: 860px) { .extras { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.contact-line { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.contact-line .email { color: var(--orange-deep); font-weight: 500; text-underline-offset: 3px; }

/* footer */
.footer { background: var(--ink); color: var(--cream); padding-block: 48px; }
.footer .wrap { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 28px 56px; align-items: center; }
.footer img { display: block; width: 220px; height: auto; }
.footer-meta { display: grid; gap: 8px; font-size: 15px; }
.footer-meta .mono { font-size: 13px; color: #BDB1A8; letter-spacing: 0.04em; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-links a { color: var(--orange); text-underline-offset: 3px; }
@media (max-width: 640px) { .footer .wrap { grid-template-columns: minmax(0, 1fr); } .footer img { width: 180px; } }

/* ---------- registration page ---------- */
.page-head { position: relative; overflow: hidden; background: var(--orange); padding-block: clamp(36px, 5vw, 64px) calc(min(11vw, 150px) + 24px); }
.page-head h1 { margin: 0; font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: clamp(38px, 6vw, 72px); line-height: 1; letter-spacing: -0.025em; text-wrap: balance; }
.page-head p { margin: 14px 0 0; font-family: var(--f-display); font-weight: 600; font-size: clamp(17px, 1.8vw, 21px); }
.page-head .hero-track { left: 18%; width: 92%; max-height: 150px; }
.page-head .hero-title { max-width: min(560px, 100%); }

.reg { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; padding-block: clamp(40px, 6vw, 72px) clamp(64px, 8vw, 104px); }
@media (max-width: 900px) { .reg { grid-template-columns: minmax(0, 1fr); } }
.reg-aside { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 92px); }
@media (max-width: 900px) { .reg-aside { position: static; } }
.reg-aside .aside-note .email { display: block; margin-top: 2px; color: var(--cream); font-family: var(--f-mono); font-size: 14px; overflow-wrap: anywhere; }

.form { min-width: 0; }
.form fieldset { margin: 0; padding: 0 0 36px; border: 0; min-width: 0; }
.form fieldset + fieldset { padding-top: 32px; border-top: 1px solid var(--line); }
.form legend { display: flex; align-items: baseline; gap: 14px; padding: 0; margin-bottom: 22px; font-family: var(--f-display); font-style: italic; font-weight: 700; font-size: clamp(22px, 2.4vw, 28px); line-height: 1.2; }
.form legend .step { font-family: var(--f-mono); font-style: normal; font-weight: 500; font-size: 13px; letter-spacing: 0.12em; color: var(--orange-deep); }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 20px; }
.grid .full { grid-column: 1 / -1; }
@media (max-width: 600px) { .grid { grid-template-columns: minmax(0, 1fr); } }
.field { display: grid; gap: 6px; min-width: 0; align-content: start; }
.field > label, .group-label { font-weight: 500; font-size: 15px; line-height: 1.35; }
.req { color: var(--orange-deep); margin-left: 2px; }
.opt { color: var(--ink-soft); font-weight: 400; font-size: 13px; margin-left: 6px; }
.hint { margin: 0; font-size: 13px; color: var(--ink-soft); line-height: 1.45; }
.form input[type="text"], .form input[type="email"], .form input[type="tel"], .form input[type="url"], .form select, .form textarea {
  width: 100%; min-height: 48px; padding: 11px 14px;
  font: inherit; font-size: 16px; color: var(--ink);
  background: var(--white); border: 1.5px solid var(--line-strong); border-radius: var(--radius);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
.form select { appearance: none; padding-right: 40px; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 20px) 21px, calc(100% - 14px) 21px; background-size: 6px 6px; background-repeat: no-repeat; }
.form input:hover, .form select:hover, .form textarea:hover { border-color: var(--ink-soft); }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(255, 107, 0, .45); }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--error); }
.field-error { margin: 0; font-size: 13px; font-weight: 500; color: var(--error); }
.field-error:empty { display: none; }

.choices { display: flex; flex-wrap: wrap; gap: 10px; }
.choice { position: relative; display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 9px 14px; background: var(--white); border: 1.5px solid var(--line-strong); border-radius: var(--radius); cursor: pointer; font-size: 15px; line-height: 1.3; }
.choice:hover { border-color: var(--ink-soft); }
.choice input { width: 18px; height: 18px; margin: 0; accent-color: var(--orange-deep); flex: none; }
.choice:has(input:checked) { border-color: var(--ink); background: var(--tint); }
.choice:has(input:focus-visible) { outline: 3px solid var(--orange); outline-offset: 2px; }

.agree { display: grid; gap: 14px; }
.agree label { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 12px; align-items: start; padding: 16px 18px; background: var(--white); border: 1.5px solid var(--line-strong); border-radius: var(--radius); font-size: 15px; line-height: 1.5; cursor: pointer; }
.agree label:has(input:checked) { border-color: var(--ink); }
.agree input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--orange-deep); }
.agree a { color: var(--orange-deep); font-weight: 500; text-underline-offset: 3px; }
.agree .field-error { margin: -6px 0 0 4px; }
.agree .has-error label { border-color: var(--error); }

.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }

.error-summary { margin: 0 0 28px; padding: 18px 20px; border: 2px solid var(--error); background: #FFF4F2; border-radius: var(--radius); }
.error-summary h2 { margin: 0 0 6px; font-family: var(--f-display); font-weight: 600; font-size: 18px; color: var(--error); }
.error-summary ul { margin: 0; padding-left: 20px; }
.error-summary a { color: var(--error); }

.submit-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; padding-top: 8px; }
.submit-row .btn { min-width: 200px; font-size: 17px; min-height: 54px; }
.submit-row .btn[disabled] { opacity: .6; cursor: progress; transform: none; }
.form-status { margin: 0; font-size: 15px; }
.form-status.is-error { color: var(--error); font-weight: 500; }
.preview-note { margin: 0 0 28px; padding: 14px 18px; background: var(--tint); border-left: 4px solid var(--orange); font-size: 15px; }

.done { padding: clamp(28px, 4vw, 44px); background: var(--white); border: 2px solid var(--ink); }
.done .eyebrow { margin-bottom: 10px; }
.done h2 { margin: 0; font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: clamp(32px, 4.4vw, 52px); line-height: 1.02; letter-spacing: -0.02em; }
.done p { margin: 16px 0 0; max-width: 56ch; }
.done-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

/* =========================================================
   Interactive pieces
   ========================================================= */
.btn--sm { min-height: 40px; padding: 9px 16px; font-size: 15px; }

/* ---------- hero track + countdown ---------- */
.hero-track {
  position: absolute; left: -9%; bottom: clamp(8px, 1.2vw, 16px);
  width: auto; height: var(--track-h); aspect-ratio: 1799 / 272;
  fill: var(--ink); overflow: visible;
  transform: translateX(var(--px, 0px));
  transition: transform .6s cubic-bezier(.2, .8, .2, 1);
}
@media (min-width: 1640px) { .hero-track { left: -160px; } }
.hero-track .tp { animation: track-in .95s cubic-bezier(.2, .8, .2, 1) both; animation-delay: calc(var(--i) * 85ms + 120ms); }
@keyframes track-in { from { transform: translateX(-320px); opacity: 0; } to { transform: none; opacity: 1; } }

.countdown { position: relative; z-index: 1; display: grid; gap: 10px; justify-items: start; margin: clamp(16px, 2.8svh, 30px) 0 0; font-family: var(--f-mono); font-size: 13px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; }
.countdown .cd-units { display: flex; gap: 8px; }
.cd-unit { display: grid; justify-items: center; gap: 4px; min-width: 72px; padding: 12px 8px 10px; background: var(--ink); color: var(--cream); }
.cd-unit b { font-family: var(--f-display); font-weight: 700; font-size: clamp(26px, 3.4vw, 36px); line-height: 1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.cd-unit small { font-size: 11px; letter-spacing: 0.14em; color: var(--orange); }
@media (max-width: 400px) { .cd-unit { min-width: 62px; } }
.countdown a { color: inherit; }
.live-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--ink); margin-right: 8px; animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; } }

/* ---------- judging gut-check ---------- */
.gut { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: flex-end; gap: 6px 24px; margin: -8px 0 18px; }
.gut-score { font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--orange-deep); font-weight: 500; }
.criteria { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 0; padding: 0; list-style: none; }
.crit {
  position: relative; display: block; width: 100%; height: 100%; text-align: left; cursor: pointer;
  padding: clamp(22px, 2.6vw, 30px); padding-right: 64px;
  font: inherit; color: var(--ink); background: var(--orange); border: 0; border-radius: 0;
  transition: background-color .25s ease, color .25s ease, transform .15s ease;
}
.crit:hover { transform: translateY(-3px); }
.crit-title { display: block; margin: 0 0 8px; font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: clamp(32px, 3.4vw, 42px); line-height: 1; letter-spacing: -0.01em; text-transform: uppercase; }
.crit-text { display: block; font-size: 17px; line-height: 1.45; }
.crit-box { position: absolute; top: 22px; right: 22px; width: 30px; height: 30px; border: 2.5px solid var(--ink); display: grid; place-items: center; transition: background-color .2s ease; }
.crit-box svg { width: 18px; height: 18px; stroke: var(--orange); stroke-width: 3.2; fill: none; stroke-dasharray: 30; stroke-dashoffset: 30; transition: stroke-dashoffset .3s ease .05s; }
.crit[aria-pressed="true"] { background: var(--ink); color: var(--cream); }
.crit[aria-pressed="true"] .crit-title { color: var(--orange); }
.crit[aria-pressed="true"] .crit-box { border-color: var(--orange); }
.crit[aria-pressed="true"] .crit-box svg { stroke-dashoffset: 0; }
@media (max-width: 760px) { .criteria { grid-template-columns: minmax(0, 1fr); } }

/* ---------- sponsor tier explorer ---------- */
.tier-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 0 0 14px; }
.tier {
  display: grid; gap: 4px; align-content: start; padding: 20px 20px 18px; text-align: left; cursor: pointer;
  font: inherit; color: var(--ink); background: var(--cream); border: 2px solid var(--ink); border-radius: 0;
  transition: background-color .2s ease, color .2s ease, transform .15s ease;
}
.tier:hover { transform: translateY(-2px); }
.tier[aria-selected="true"] { background: var(--ink); color: var(--cream); }
.tier-arc { width: 92px; height: auto; aspect-ratio: 1799 / 272; margin-bottom: 8px; }
.tier-arc .bg { fill: #EBCDB6; }
.tier-arc .fg { fill: var(--orange); }
.tier[aria-selected="true"] .tier-arc .bg { fill: #4A3F38; }
.t-name { font-family: var(--f-display); font-style: italic; font-weight: 600; font-size: 18px; }
.t-price { font-family: var(--f-display); font-weight: 700; font-size: clamp(28px, 3vw, 38px); line-height: 1.1; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.t-note { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); }
.tier[aria-selected="true"] .t-note { color: var(--orange); }
@media (max-width: 860px) { .tier-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.tier-panel { background: var(--cream); border: 2px solid var(--ink); padding: clamp(20px, 3vw, 32px); margin-bottom: 44px; }
.tier-sum { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 20px; margin: 0 0 20px; }
.tier-sum h3 { margin: 0; font-family: var(--f-display); font-style: italic; font-weight: 700; font-size: clamp(22px, 2.4vw, 28px); }
.tier-sum .price { margin-left: 8px; padding: 3px 9px; vertical-align: 0.15em; font-family: var(--f-mono); font-style: normal; font-weight: 500; font-size: 16px; letter-spacing: 0.04em; background: var(--tint); white-space: nowrap; }
.tier-sum p { margin: 0; font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--orange-deep); }
.perk-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px 36px; }
@media (max-width: 860px) { .perk-cols { grid-template-columns: minmax(0, 1fr); } }
.perk-cols h4 { margin: 0 0 6px; padding-bottom: 8px; border-bottom: 2px solid var(--ink); font-family: var(--f-display); font-style: italic; font-weight: 700; font-size: 15px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--orange-deep); }
.perk-cols ul { margin: 0; padding: 0; list-style: none; }
.perk { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 10px; align-items: baseline; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 15px; line-height: 1.4; }
.perk .ic { font-family: var(--f-mono); font-weight: 500; color: var(--orange-deep); }
.perk .val { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; background: var(--tint); padding: 2px 7px; white-space: nowrap; }
.perk small { display: block; font-size: 13px; color: var(--ink-soft); }
.perk.no { color: #A89C93; }
.perk.no .ic { color: #C9BDB3; }
.perk.no small { color: #B9AEA6; }
.tier-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin: 20px 0 44px; }
.tier-foot p { margin: 0; max-width: 70ch; font-size: 15px; color: var(--ink-soft); }
.sponsor-note { margin: 28px 0 0; max-width: 70ch; }
.sponsor-note + .faq-more { margin-top: 12px; }
.link-btn { padding: 0; border: 0; background: none; font: inherit; font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.compare-wrap { overflow-x: auto; margin: -24px 0 44px; background: var(--cream); border: 2px solid var(--ink); }
.compare { width: 100%; min-width: 640px; border-collapse: collapse; font-size: 15px; }
.compare th, .compare td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: center; }
.compare th[scope="row"] { text-align: left; font-weight: 400; }
.compare thead th { font-family: var(--f-display); font-style: italic; font-weight: 600; font-size: 16px; border-bottom: 2px solid var(--ink); }
.compare .grp th { text-align: left; font-family: var(--f-display); font-style: italic; font-weight: 700; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; color: var(--orange-deep); background: var(--tint); }
.compare td.sel, .compare th.sel { background: var(--tint); }
.compare .ck { color: var(--orange-deep); font-weight: 700; }

/* ---------- registration stepper + badge ---------- */
.stepper { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; margin: 0 0 30px; padding: 0; list-style: none; }
.stepper li { min-width: 0; }
.stepper button { display: grid; gap: 8px; width: 100%; padding: 0; text-align: left; font: inherit; background: none; border: 0; cursor: pointer; color: var(--ink-soft); }
.stepper button:disabled { cursor: default; }
.stepper .bar { height: 10px; background: var(--line); transition: background-color .25s ease; }
.stepper .lbl { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stepper .is-done .bar { background: var(--ink); }
.stepper .is-done { color: var(--ink); }
.stepper .is-current .bar { background: var(--orange); }
.stepper .is-current { color: var(--orange-deep); font-weight: 500; }
@media (max-width: 520px) { .stepper .lbl { display: none; } .stepper .is-current .lbl { display: block; position: absolute; left: 0; bottom: 0; } .stepper { position: relative; padding-bottom: 22px; } }
.js .form .form-step:not(.is-current) { display: none; }
.js .form fieldset + fieldset { padding-top: 0; border-top: 0; }
.step-nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line); }
.step-nav .btn--ink { margin-left: auto; }
.no-js .js-only { display: none !important; }

.badge {
  position: relative; margin: 0 0 18px; background: var(--cream); color: var(--ink);
  border: 2px solid var(--ink); box-shadow: 6px 6px 0 var(--ink); overflow: hidden;
  transform: rotate(-1.2deg); transition: transform .3s ease;
}
.badge:hover { transform: rotate(0deg); }
.badge-top { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 26px 16px 12px; background: var(--orange); }
.badge-top::before { content: ""; position: absolute; top: 9px; left: 50%; width: 38px; height: 8px; margin-left: -19px; border-radius: 6px; background: var(--cream); box-shadow: inset 0 0 0 2px var(--ink); }
.badge-top svg { width: 64px; height: auto; aspect-ratio: 1799 / 272; fill: var(--cream); flex: none; }
.badge-top span { font-family: var(--f-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; }
.badge-body { padding: 16px 16px 14px; min-height: 168px; }
.badge-role { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--orange-deep); font-weight: 500; }
.badge-name { margin: 4px 0 0; font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: 28px; line-height: 1.05; letter-spacing: -0.02em; overflow-wrap: anywhere; }
.badge-school { margin: 6px 0 0; font-weight: 500; font-size: 14px; line-height: 1.35; overflow-wrap: anywhere; }
.badge-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.badge-tags span { font-family: var(--f-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 6px; background: var(--ink); color: var(--cream); }
.badge .placeholder { color: #B9AEA6; }
.badge-foot { display: flex; justify-content: space-between; gap: 8px; padding: 10px 16px; border-top: 2px dashed var(--line-strong); font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); }
.badge-stamp {
  position: absolute; right: 14px; bottom: 10px; padding: 6px 10px; border: 3px solid var(--orange-deep); color: var(--orange-deep);
  font-family: var(--f-display); font-style: italic; font-weight: 800; font-size: 20px; letter-spacing: 0.02em; text-transform: uppercase;
  transform: rotate(-12deg); background: rgba(255, 250, 246, .85);
  animation: stamp .45s cubic-bezier(.2, 1.4, .4, 1) both;
}
@keyframes stamp { from { transform: rotate(-12deg) scale(2.2); opacity: 0; } to { transform: rotate(-12deg) scale(1); opacity: 1; } }
.reg-aside { background: transparent; color: var(--ink); padding: 0; }
.reg-aside .aside-note { margin: 22px 0 0; padding: 0; border: 0; font-size: 14px; color: var(--ink-soft); }
.reg-aside .aside-note .email { color: var(--ink); }
@media (max-width: 900px) { .badge { max-width: 380px; } }
#form-root, .error-summary { scroll-margin-top: 96px; }
@media (max-width: 900px) {
  .reg-aside { order: 2; }
  .badge-body { min-height: 0; }
}

/* =========================================================
   Night Shift theme: dark, terminal-flavored, orange as the only light source.
   Layered over the base styles above; edit the tokens here to adjust the look.
   ========================================================= */
:root {
  color-scheme: dark;
  --orange: #FF6B00;
  --orange-deep: #FF8A3D;
  --ink: #F3ECE6;
  --ink-soft: #A69C94;
  --cream: #0D0C0B;
  --tint: #171412;
  --line: #2A2522;
  --line-strong: #463E38;
  --white: #141210;
  --error: #FF6B5E;
  --f-display: "Space Grotesk", system-ui, sans-serif;
  --f-body: "Inter", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 6px;
}
body *:not(em):not(i) { font-style: normal !important; }
body { font-size: 16.5px; }
::selection { background: var(--orange); color: #0D0C0B; }

.eyebrow::before, .facts dt::before, .stat-label::before { content: "> "; color: var(--orange); }
.display, .rule-head, .page-head h1 { font-weight: 700; letter-spacing: -0.035em; }
.rule-head::before { content: "#"; font-family: var(--f-mono); font-weight: 400; color: var(--orange); }
.rule-head::after { height: 1px; background: var(--line-strong); }

.btn { font-family: var(--f-mono); font-weight: 600; font-size: 14px; letter-spacing: 0.04em; text-transform: uppercase; }
.btn--ink { background: var(--orange); border-color: var(--orange); color: #0D0C0B; box-shadow: 0 0 0 0 rgba(255,107,0,.5); }
.btn--ink:hover { background: #FF8A3D; box-shadow: 0 0 28px rgba(255,107,0,.45); }
.btn--ghost { border-color: var(--line-strong); }
.btn--ghost:hover { background: var(--tint); color: var(--ink); border-color: var(--orange); }

.topbar { background: rgba(13,12,11,.82); backdrop-filter: blur(10px); border-top: 0; border-bottom-color: var(--line); }

.hero {
  background:
    radial-gradient(60% 70% at 85% 110%, rgba(255,107,0,.38), transparent 70%),
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 44px 44px,
    var(--cream);
}
.hero-title img { filter: invert(1) brightness(1.05); }
.hero-tag { color: var(--orange); font-family: var(--f-mono); font-weight: 500; letter-spacing: -0.01em; }
.hero-tag::after { content: "_"; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-track { fill: var(--orange); filter: drop-shadow(0 0 24px rgba(255,107,0,.35)); }
.cd-unit { background: var(--tint); color: var(--ink); border: 1px solid var(--line-strong); }
.cd-unit b { font-family: var(--f-mono); }

.facts { background: var(--tint); color: var(--ink); border-block: 1px solid var(--line); }
.facts dt::before { content: ""; }
.facts dd { font-family: var(--f-mono); font-weight: 500; font-size: clamp(15px, 1.5vw, 17px); }

.stats li { border-top: 1px solid var(--line-strong); }
.stat-num { font-family: var(--f-mono); font-weight: 700; color: var(--orange); }

.crit { background: var(--tint); color: var(--ink); border: 1px solid var(--line-strong); border-radius: var(--radius); }
.crit-title { color: var(--orange); font-family: var(--f-mono); font-weight: 700; font-size: clamp(26px, 2.8vw, 34px); }
.crit-box { border: 1.5px solid var(--line-strong); border-radius: 4px; }
.crit[aria-pressed="true"] { background: var(--orange); color: #0D0C0B; }
.crit[aria-pressed="true"] .crit-title { color: #0D0C0B; }
.crit[aria-pressed="true"] .crit-box { border-color: #0D0C0B; }
.crit[aria-pressed="true"] .crit-box svg { stroke: #0D0C0B; }

.faq summary { font-family: var(--f-body); font-weight: 500; }
.sponsors { background: var(--tint); }
.sponsor-slot { background: var(--cream); border-color: var(--line-strong); border-radius: var(--radius); }
.sponsor-slot--filled { background: #EFE8E1; border-color: #EFE8E1; }
.sponsor-slot:hover { box-shadow: 0 0 0 1px var(--orange), 0 0 30px rgba(255,107,0,.25); transform: none; }

.footer { background: #080707; border-top: 1px solid var(--line); }

/* sponsor + register pages */
.page-head { background: radial-gradient(60% 90% at 90% 120%, rgba(255,107,0,.35), transparent 70%), var(--cream); border-bottom: 1px solid var(--line); }
.tier { background: var(--tint); border: 1px solid var(--line-strong); border-radius: var(--radius); }
.tier[aria-selected="true"] { background: var(--orange); color: #0D0C0B; border-color: var(--orange); }
.tier[aria-selected="true"] .t-note { color: #0D0C0B; }
.tier-arc .bg { fill: #3A322C; }
.tier[aria-selected="true"] .tier-arc .fg { fill: #0D0C0B; }
.tier-panel, .compare-wrap { background: var(--tint); border: 1px solid var(--line-strong); border-radius: var(--radius); }
.perk-cols h4 { border-bottom-color: var(--line-strong); }
.perk.no, .perk.no small, .perk.no .ic { color: #5C534D; }
.badge { background: var(--tint); border-color: var(--line-strong); box-shadow: 0 0 40px rgba(255,107,0,.18); }
.badge-top svg { fill: #0D0C0B; }
.badge-tags span { background: var(--orange); color: #0D0C0B; }
.badge-stamp { background: rgba(13,12,11,.85); }
.done { background: var(--tint); border-color: var(--line-strong); }
.error-summary { background: #2A1412; }
.form select { background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); }
.footer { color: var(--ink); }

/* ---------- Holo Lanyard badge (register page) ---------- */
.badge { transform: none; border-radius: 18px; background: linear-gradient(165deg, #201B18, #0F0D0C 70%); border: 1px solid rgba(255,255,255,.08); box-shadow: 0 28px 60px rgba(0,0,0,.6), inset 0 1px 0 rgba(255,255,255,.07); transition: transform .4s ease; }
.badge:hover { transform: perspective(900px) rotateY(-7deg) rotateX(4deg); }
.badge::after { content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit; background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,.16) 44%, rgba(255,190,240,.10) 50%, rgba(150,220,255,.08) 55%, transparent 68%) 0 0 / 260% 100%; animation: sheen 6s ease-in-out infinite; }
@keyframes sheen { 0%, 100% { background-position: 100% 0; } 50% { background-position: 0 0; } }
.badge-top { flex-direction: column; align-items: flex-start; justify-content: flex-end; gap: 14px; min-height: 150px; padding: 40px 18px 16px; background: radial-gradient(120% 100% at 100% 0%, #FFB27A 0%, #FF6B00 45%, #C24A00 100%); }
.badge-top::before { top: 14px; width: 46px; height: 10px; margin-left: -23px; border-radius: 10px; background: #0D0C0B; box-shadow: none; }
.badge-top svg { width: 190px; fill: #0D0C0B; }
.badge-top span { color: #0D0C0B; font-weight: 600; }
.badge-body { padding: 18px 18px 14px; }
.badge-role { display: inline-block; padding: 3px 9px; border-radius: 999px; background: rgba(255,107,0,.16); color: var(--orange); }
.badge-name { margin-top: 10px; font-family: var(--f-display); font-weight: 700; font-size: 30px; letter-spacing: -0.035em; }
.badge-school { color: var(--ink-soft); }
.badge-tags span { border-radius: 999px; padding: 4px 9px; background: rgba(255,255,255,.06); color: var(--ink); border: 1px solid rgba(255,255,255,.12); }
.badge .placeholder { color: #5C534D; }
.badge-foot { border-top: 1px solid rgba(255,255,255,.08); color: var(--ink-soft); padding: 12px 18px; }
.badge-foot::after { content: "Olin College"; }
.badge-stamp { border-radius: 8px; border-color: var(--orange); color: var(--orange); background: rgba(13,12,11,.85); }

/* ---------- register page: simple top bar + fact-card header ---------- */
.topbar--simple .nav-toggle { display: none !important; }
.topbar--simple .nav-links { display: flex !important; position: static; flex-direction: row; align-items: center; gap: clamp(14px, 2.4vw, 28px); padding: 0; border: 0; background: none; }
.topbar--simple .nav .nav-links a { padding: 0; border: 0; color: var(--ink-soft); }
.topbar--simple .nav .nav-links a:hover { color: var(--orange); }
.bar-back { white-space: nowrap; }
.page-head--facts { padding-block: clamp(40px, 5vw, 64px) clamp(32px, 4vw, 48px); }
.page-head--facts h1 { font-size: clamp(38px, 5.4vw, 68px); letter-spacing: -0.04em; }
.fact-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 760px; margin: 28px 0 0; }
.fact-cards div { padding: 14px 16px; background: var(--tint); border: 1px solid var(--line-strong); border-radius: var(--radius); }
.fact-cards dt { font-family: var(--f-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--orange); }
.fact-cards dt::before { content: "> "; }
.fact-cards dd { margin: 6px 0 0; font-family: var(--f-mono); font-weight: 500; font-size: 15px; line-height: 1.35; }
@media (max-width: 640px) { .fact-cards { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 520px) {
  .bar-back-long { display: none; }
  .fact-cards { gap: 6px; margin-top: 20px; }
  .fact-cards div { display: flex; align-items: baseline; gap: 12px; padding: 10px 14px; }
  .fact-cards dt { flex: none; width: 64px; }
  .fact-cards dd { margin: 0; font-size: 14px; }
  .fact-cards dd br { display: none; }
}