@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url('/fonts/inter-latin-wght.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  src: url('/fonts/jetbrains-mono-latin-wght.woff2') format('woff2');
}

:root {
  --paper: #ffffff;
  --lift: 0 1px 2px rgba(18, 22, 28, 0.05), 0 6px 16px rgba(18, 22, 28, 0.06);
  --lift-hover: 0 2px 4px rgba(18, 22, 28, 0.06), 0 10px 24px rgba(18, 22, 28, 0.09);
  --surface: #ffffff;
  --ink: #12161c;
  --muted: #5b6069;
  --line: #d6d2ca;
  --line-strong: #b8b1a5;
  --cobalt: #2547c9;
  --cobalt-soft: #eaeefc;
  --pass: #17794c;
  --pass-soft: #e8f4ed;
  --fail: #c0392b;
  --fail-soft: #fbecea;
  --code-bg: #171b21;
  --code-ink: #e6e3dd;
  --radius: 8px;
  --ui: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main, .top, .foot { width: min(1080px, 100% - 40px); margin-inline: auto; }

a { color: var(--cobalt); }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand span { color: var(--cobalt); }

.brand img { display: block; flex: none; }

.button {
  display: inline-block;
  background: var(--cobalt);
  color: #fff;
  border-radius: var(--radius);
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.button:hover { background: #1d3aa8; }

.button.big { padding: 13px 26px; font-size: 16px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 48px;
  align-items: center;
  padding: 40px 0 64px;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead { margin: 0 0 26px; font-size: clamp(17px, 2vw, 20px); color: var(--muted); max-width: 30ch; }

.calls { margin: 0 0 12px; }

.aside { margin: 0; font-size: 13px; color: var(--muted); }

.shot {
  box-shadow: var(--lift);
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(18, 22, 28, 0.1);
}

.shot figcaption {
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

pre.code, pre.terminal {
  margin: 0;
  padding: 16px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

pre.terminal { background: var(--code-bg); color: var(--code-ink); }

pre.code.light { background: var(--code-bg); color: var(--code-ink); }

.checks { list-style: none; margin: 0; padding: 0; }

.checks li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 12px 16px;
  font-size: 13px;
  border-top: 1px solid var(--line);
}

.checks li.pass { background: var(--pass-soft); color: #14603c; }

.checks li.fail { background: var(--fail-soft); color: #97281c; }

.tick, .cross { font-family: var(--mono); font-size: 0; }

.tick::before { content: '\2713'; font-size: 13px; font-weight: 700; color: var(--pass); }

.cross::before { content: '\2717'; font-size: 13px; font-weight: 700; color: var(--fail); }

h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
}

.band, .lesson, .ending { padding: 56px 0; border-top: 1px solid var(--line); }

.band-lead { margin: 0 0 28px; color: var(--muted); }

.columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 28px;
  margin-top: 28px;
}

.columns h3, .tier h3 { margin: 0 0 8px; font-size: 17px; }

.columns p { margin: 0; color: var(--muted); font-size: 15px; }

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}

.pane {
  box-shadow: var(--lift);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  overflow: hidden;
}

.pane.dark { padding: 0; }

.pane.dark .step { padding: 14px 16px 0; }

.step {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.pane h3 { margin: 0 0 6px; font-size: 20px; letter-spacing: -0.01em; }

.goal { margin: 0 0 16px; color: var(--muted); }

.pane p { font-size: 15px; }

.pane code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--cobalt-soft);
  border-radius: 4px;
  padding: 1px 5px;
}

.task-label {
  margin: 20px 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--cobalt);
}

.task { margin: 0; padding-left: 14px; border-left: 2px solid var(--cobalt); }

.tiers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 28px;
}

.tier .blurb { margin: 0 0 12px; font-size: 14px; color: var(--muted); }

.tier ul { margin: 0; padding-left: 18px; font-size: 15px; }

.tier li { margin-bottom: 4px; }

.ending { text-align: center; }

.ending h2 { margin-bottom: 20px; }

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.brand.small { font-size: 16px; margin: 0; }

.foot nav { display: flex; flex-wrap: wrap; gap: 18px; }

.foot a { color: var(--muted); }

.foot a:hover { color: var(--cobalt); }

@media (max-width: 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding: 24px 0 48px; }
  .lead { max-width: none; }
  .band, .lesson, .ending { padding: 44px 0; }
}

.near-miss {
  box-shadow: var(--lift);
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.near-miss .step { margin: 0; padding: 14px 16px; }

.near-miss code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--cobalt-soft);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--ink);
}

pre.code.inline-code {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin: 0 0 14px;
  font-size: 12.5px;
}

.contact { padding: 40px 0 64px; max-width: 620px; }

.small-title { font-size: clamp(30px, 4vw, 40px); margin: 0 0 14px; letter-spacing: -0.02em; }

.lead.wide { max-width: none; }

#contact-form { display: flex; flex-direction: column; gap: 16px; margin-top: 28px; }

#contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
}

#contact-form input, #contact-form textarea {
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 12px;
}

#contact-form textarea { resize: vertical; min-height: 140px; }

#contact-form input:focus, #contact-form textarea:focus { outline: 2px solid var(--cobalt); outline-offset: -1px; }

#contact-form button { align-self: flex-start; border: none; cursor: pointer; }

#contact-form button:disabled { opacity: 0.6; cursor: default; }

.away { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-note { margin: 0; font-size: 14px; color: var(--muted); min-height: 1.4em; }

.form-note.good { color: var(--pass); }

.form-note.bad { color: var(--fail); }

.hero.narrow { grid-template-columns: minmax(0, 1fr); }

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.module-card {
  display: block;
  box-shadow: var(--lift);
  transition: box-shadow 120ms ease, border-color 120ms ease;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--ink);
}

.module-card:hover { border-color: var(--cobalt); box-shadow: var(--lift-hover); }

.module-card h3 { margin: 0 0 6px; font-size: 17px; }

.module-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }

.learn {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px 24px;
}

.learn li {
  padding-left: 20px;
  position: relative;
  color: var(--muted);
  line-height: 1.6;
}

.learn li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cobalt);
}

.lesson-list {
  box-shadow: var(--lift);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 22px;
}

.lesson-list ul {
  margin: 0;
  padding: 0;
  list-style: none;
  columns: 2;
  column-gap: 32px;
}

.lesson-list li {
  break-inside: avoid;
  padding: 5px 0;
  font-size: 15px;
  border-bottom: 1px solid var(--line);
}

.lesson-list li:last-child { border-bottom: 0; }

@media (max-width: 720px) {
  .lesson-list ul { columns: 1; }
}

.topics {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topics li {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.2;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
}