:root {
  --paper: #F6F4EE;
  --card: #FBFAF6;
  --ink: #14120F;
  --ink-2: #4A4740;
  --rule: rgba(20, 18, 15, 0.15);
  --signal: #EA580C;
  --signal-ink: #9A3412;
  --mono: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --header-h: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
.nowrap { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

html { scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.6 var(--sans);
  text-rendering: optimizeLegibility;
}
@media (min-width: 768px) { body { font-size: 1.125rem; } }

h1, h2, h3 { font-family: var(--mono); line-height: 1.15; margin: 0; }
p, ul, ol { margin: 0; }
a { color: inherit; }
img, iframe { max-width: 100%; }

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }

.skip {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 8px 12px; font-family: var(--mono);
}
.skip:focus { top: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: var(--header-h); }

/* Logo plate */
.plate {
  display: inline-flex; flex-direction: column; gap: 1px;
  border: 1.5px solid var(--ink);
  padding: 5px 10px 6px;
  font: 700 0.75rem/1.15 var(--mono);
  letter-spacing: 0.08em;
  text-decoration: none;
  background: var(--card);
}
.plate-line { display: flex; align-items: center; white-space: nowrap; }
.plate-tick { display: inline-flex; align-items: center; margin-left: 10px; }
.plate-tick::after { content: ""; width: 14px; height: 1.5px; background: var(--ink); margin-left: 3px; }
.cursor { display: inline-block; width: 0.5em; height: 0.95em; background: var(--signal); }
@media (prefers-reduced-motion: no-preference) {
  .cursor { animation: blink 0.5s steps(1) 0.4s 4; }
}
@keyframes blink { 50% { opacity: 0; } }

/* Buttons & links */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px;
  font: 600 0.9375rem/1 var(--mono);
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1.5px solid var(--ink);
  cursor: pointer;
  transition: transform 160ms var(--ease), box-shadow 160ms var(--ease), background-color 160ms var(--ease);
}
.btn-sm { min-height: 44px; padding: 0 14px; font-size: 0.8125rem; }
.btn-signal { background: var(--signal); color: var(--ink); box-shadow: 3px 3px 0 var(--ink); }
.btn-signal:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.btn-signal:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--card); }

.link-arrow {
  font-weight: 600;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  transition: color 160ms var(--ease);
}
.link-arrow:hover { color: var(--signal-ink); }

/* Hero */
.hero { padding: 24px 0 72px; border-bottom: 1px solid var(--rule); }
@media (min-width: 768px) { .hero { padding: 32px 0 104px; } }
.hero-title { font-size: clamp(2.5rem, 8vw, 5.75rem); font-weight: 700; letter-spacing: -0.03em; max-width: 14ch; }
.hero-sub {
  display: flex; align-items: center; gap: 12px;
  margin-top: 16px;
  font: 600 clamp(1.125rem, 2.6vw, 1.625rem)/1.2 var(--mono);
  letter-spacing: 0.04em; text-transform: uppercase;
}
.tick { width: 28px; height: 6px; background: var(--signal); flex: none; }
.hero-tagline { margin-top: 28px; font-size: clamp(1.25rem, 2.4vw, 1.625rem); line-height: 1.4; }

.facts {
  list-style: none; padding: 0; margin-top: 36px;
  display: grid; grid-template-columns: repeat(2, 1fr);
  border-top: 1.5px solid var(--ink); border-left: 1.5px solid var(--ink);
}
.facts li {
  padding: 12px 14px;
  border-right: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink);
  font: 600 0.875rem/1.2 var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--card);
}
.facts li:last-child { grid-column: 1 / -1; background: var(--signal); }
@media (min-width: 640px) {
  .facts { grid-template-columns: repeat(5, 1fr); }
  .facts li:last-child { grid-column: auto; }
}

.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 20px 28px; }

/* Sections */
.section { padding: 64px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 768px) { .section { padding: 96px 0; } }
.label {
  font: 600 0.8125rem/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--signal-ink); margin-bottom: 14px;
}
.section h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 24px; text-wrap: balance; }
.minor {
  font-size: 0.875rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  margin: 48px 0 16px; padding-top: 16px; border-top: 1.5px solid var(--ink); max-width: 100%;
}
.prose p + p { margin-top: 12px; }

.bullets { list-style: none; padding: 0; }
.bullets li { position: relative; padding-left: 24px; }
.bullets li + li { margin-top: 10px; }
.bullets li::before { content: ""; position: absolute; left: 2px; top: calc(0.8em - 4px); width: 8px; height: 8px; background: var(--signal); }
.bullets a { text-decoration-color: var(--signal); text-decoration-thickness: 2px; text-underline-offset: 3px; }

/* Refs */
.refs { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr; gap: 0; border-top: 1px solid var(--rule); }
@media (min-width: 640px) { .refs { grid-template-columns: repeat(2, 1fr); column-gap: 32px; } }
@media (min-width: 1024px) { .refs { grid-template-columns: repeat(3, 1fr); } }
.refs a {
  display: flex; flex-direction: column; gap: 2px;
  padding: 14px 0; min-height: 44px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.ref-org { font: 600 0.8125rem/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
.ref-org::after { content: " ↗"; color: var(--signal-ink); }
.ref-title { color: var(--ink-2); line-height: 1.4; }
.refs a:hover .ref-title { color: var(--ink); text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 3px; }
.reach { margin-top: 28px; color: var(--ink-2); }

/* 2x2 */
.quad { margin: 40px 0 0; }
.quad table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.quad th { font: 600 0.75rem/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); }
.quad thead th { padding: 0 14px 12px; text-align: left; }
.quad tbody th { width: 32px; padding: 0 10px 0 0; writing-mode: vertical-rl; transform: rotate(180deg); text-align: center; }
.quad td { border: 1.5px solid var(--ink); background: var(--card); padding: 16px 14px 18px; vertical-align: top; position: relative; }
.quad thead td { width: 32px; border: 0; background: none; padding: 0; }
.quad td strong, .quad td span { display: block; }
.quad td strong { font: 700 1.0625rem/1.3 var(--mono); }
.quad td strong::before { content: ""; display: block; width: 8px; height: 8px; background: var(--ink); margin-bottom: 12px; }
.quad td span { margin-top: 6px; font-size: 0.9375rem; line-height: 1.4; color: var(--ink-2); }
.quad .quad-gap { background: var(--signal); }
.quad .quad-gap strong::before { background: var(--card); border: 1.5px solid var(--ink); }
.quad .quad-gap span { color: var(--ink); }
.quad-tag {
  display: inline-block; margin-top: 14px; padding: 4px 8px;
  font: 700 0.75rem/1.2 var(--mono); font-style: normal; letter-spacing: 0.1em; text-transform: uppercase;
  background: var(--ink); color: var(--paper);
}
@media (min-width: 768px) {
  .quad table { width: calc(100% - 210px); }
  .quad tbody th { width: auto; writing-mode: horizontal-tb; transform: none; text-align: left; padding: 0 20px 0 0; }
  .quad thead td { width: 140px; }
  .quad thead th { padding: 0 24px 12px; }
  .quad tbody td { padding: 24px 24px 28px; }
  .quad td strong { font-size: 1.25rem; }
  .quad-tag { position: absolute; left: calc(100% + 18px); top: 50%; transform: translateY(-50%); margin: 0; white-space: nowrap; background: none; color: var(--signal-ink); padding: 0; }
  .quad-tag::before { content: "← "; }
}

/* Weeks */
.weeks { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr; gap: 0; counter-reset: none; }
.weeks li {
  position: relative;
  display: flex; flex-direction: column; gap: 6px;
  padding: 18px 20px;
  border: 1.5px solid var(--ink);
  background: var(--card);
}
.weeks li + li { border-top: 0; }
.week-n { font: 600 0.8125rem/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); }
.week-t { font: 700 1.375rem/1.2 var(--mono); }
.week-final { background: var(--signal) !important; }
.week-final .week-n { color: var(--ink); }
@media (min-width: 768px) {
  .weeks { grid-template-columns: repeat(4, 1fr); }
  .weeks li { padding: 24px 22px 28px 30px; }
  .weeks li + li { border-top: 1.5px solid var(--ink); border-left: 0; }
  .weeks li:not(:last-child)::after {
    content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%);
    z-index: 1; width: 26px; height: 26px; display: grid; place-items: center;
    background: var(--paper); border: 1.5px solid var(--ink); border-radius: 50%;
    font: 700 0.875rem/1 var(--mono);
  }
}

/* Mentors */
.three-col { display: grid; gap: 20px; }
@media (min-width: 768px) { .three-col { grid-template-columns: repeat(3, 1fr); gap: 24px; } }
.spec { border: 1.5px solid var(--ink); background: var(--card); padding: 24px; display: flex; flex-direction: column; }
.spec-get { border-top: 6px solid var(--signal); padding-top: 19.5px; }
.spec-h { font-size: 1rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 18px; }

/* Build grid */
.build-grid {
  list-style: none; padding: 0;
  display: grid; grid-template-columns: repeat(2, 1fr);
  border-top: 1.5px solid var(--ink); border-left: 1.5px solid var(--ink);
}
.build-grid li:last-child { grid-column: 1 / -1; }
@media (min-width: 768px) {
  .build-grid { grid-template-columns: repeat(3, 1fr); }
  .build-grid li:last-child { grid-column: auto; }
}
.build-grid li {
  display: flex; flex-direction: column; gap: 6px;
  padding: 16px;
  border-right: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink);
  background: var(--card);
  transition: background-color 160ms var(--ease);
}
.build-grid li:hover { background: #fff; }
.b-term { font: 700 1rem/1.2 var(--mono); }
.b-term::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--signal); margin-right: 8px; vertical-align: 2px; }
.b-ex { font-size: 0.9375rem; line-height: 1.4; color: var(--ink-2); }
@media (max-width: 420px) {
  .build-grid li { padding: 14px 12px; }
  .b-term { font-size: 0.9375rem; }
}

/* Sheet embed */
.sheet { border: 1.5px solid var(--ink); background: #fff; margin-bottom: 20px; }
.sheet iframe { display: block; width: 100%; height: 560px; border: 0; }
@media (min-width: 768px) { .sheet iframe { height: 640px; } }

/* Call for mentors */
.cfm { position: relative; padding-top: 0; }
.hazard {
  height: 10px; margin-bottom: 64px;
  background: repeating-linear-gradient(-45deg, var(--signal) 0 14px, var(--ink) 14px 28px);
}
@media (min-width: 768px) { .hazard { margin-bottom: 96px; } }
.cfm-grid { display: grid; gap: 40px; }
@media (min-width: 1024px) { .cfm-grid { grid-template-columns: 5fr 7fr; gap: 56px; align-items: start; } }
.cfm h2:focus { outline: none; }
.form-box { border: 1.5px solid var(--ink); background: var(--card); padding: 20px; box-shadow: 6px 6px 0 var(--ink); }
.form-box iframe { display: block; width: 100%; min-height: 560px; border: 0; margin-bottom: 16px; }

/* Footer */
.site-footer { padding: 56px 0 72px; }
.footer-grid { display: grid; gap: 40px; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 3fr 2fr; gap: 56px; } }
.site-footer p + .label { margin-top: 28px; }
.orgs { list-style: none; padding: 0; color: var(--ink-2); }
.orgs li + li { margin-top: 12px; }
.orgs a, .site-footer p > a, .contact a {
  color: var(--ink); font-weight: 600;
  text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 2px; text-underline-offset: 3px;
}
.contact a { font-family: var(--mono); font-size: 0.9375rem; word-break: break-all; }