:root {
  --ink: #172033;
  --paper: #f6f1e7;
  --card: #fffdf8;
  --line: #d9d0c1;
  --direction: #0d6b4c;
  --accelerate: #b4532a;
  --judgement: #1d4e89;
  --danger: #8d1d32;
  --ok: #0d6b4c;
  --focus: #1d4e89;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", 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: 1.05rem;
  line-height: 1.55;
}
h1, h2, h3 { font-family: var(--serif); font-weight: 560; line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 4.4rem); margin: 0 0 0.6rem; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
a { color: var(--judgement); }
a:hover { text-decoration-thickness: 2px; }
.skip {
  position: absolute; left: 1rem; top: -4rem; background: var(--ink); color: white; padding: 0.5rem 0.8rem;
}
.skip:focus { top: 0.5rem; z-index: 5; }
.wrap { width: min(1080px, calc(100% - 2rem)); margin: 0 auto; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(246, 241, 231, 0.95); position: sticky; top: 0; z-index: 2; }
.header-row { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; padding: 0.8rem 0; }
.logo { display: inline-flex; gap: 0.55rem; align-items: center; color: var(--ink); text-decoration: none; font-weight: 650; }
.logo-mark { display: inline-flex; gap: 3px; }
.logo-mark i { display: block; width: 7px; height: 18px; background: var(--direction); }
.logo-mark i:nth-child(2) { background: var(--accelerate); height: 12px; align-self: center; }
.logo-mark i:nth-child(3) { background: var(--judgement); }
.nav ul { display: flex; flex-wrap: wrap; gap: 0.2rem 0.9rem; list-style: none; padding: 0; margin: 0; }
.nav a { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 0.25rem; }
.hero { padding: 3.2rem 0 1rem; }
.kicker { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; color: var(--direction); font-weight: 700; }
.lede { font-size: 1.25rem; max-width: 42rem; }
.actions, .button { margin-top: 0.5rem; }
.button, button.button {
  display: inline-block; background: var(--ink); color: #fff; text-decoration: none;
  border: 2px solid var(--ink); border-radius: 999px; padding: 0.65rem 1.1rem; font: inherit; cursor: pointer;
}
.button-quiet { background: transparent; color: var(--ink); }
.button-small { padding: 0.35rem 0.75rem; font-size: 0.92rem; }
.principle, .split, .cards, .notice, .legal, .mission, .narrow { padding-bottom: 2.5rem; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; list-style: none; padding: 0; }
.steps li { background: var(--card); border-top: 6px solid var(--direction); padding: 1rem; }
.steps li:nth-child(2) { border-top-color: var(--accelerate); }
.steps li:nth-child(3) { border-top-color: var(--judgement); }
.steps span { font-family: var(--serif); font-size: 1.8rem; }
.split { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 1.5rem; align-items: start; }
.cards { display: grid; gap: 1rem; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card, .notice { background: var(--card); border: 1px solid var(--line); padding: 1rem 1.1rem; }
.notice { border-left: 6px solid var(--judgement); }
.skill-list, .plain, .mission-list { padding-left: 1.1rem; }
.skill-list li { margin: 0.8rem 0; }
.mission-list { list-style: none; padding: 0; }
.mission-list li { border-bottom: 1px solid var(--line); padding: 0.8rem 0; }
.mission-list span { display: inline-block; margin-left: 0.6rem; color: var(--direction); font-size: 0.92rem; }
.stack-form, .inline-form { display: grid; gap: 0.45rem; max-width: 40rem; }
.inline-form { grid-template-columns: auto 1fr auto auto; align-items: center; }
label { font-weight: 650; }
input, textarea, select {
  font: inherit; color: var(--ink); background: white; border: 1px solid #8d8476; border-radius: 0.4rem; padding: 0.55rem 0.65rem; width: 100%;
}
.choice { display: flex; gap: 0.6rem; align-items: flex-start; font-weight: 500; padding: 0.45rem 0; }
.choice input { width: auto; margin-top: 0.35rem; }
fieldset.question { border: 1px solid var(--line); background: var(--card); margin: 1rem 0; padding: 1rem; }
.ai-example { border-left: 4px solid var(--accelerate); margin: 0.5rem 0 1rem; padding-left: 0.8rem; }
.example-label { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accelerate); font-weight: 700; }
.feedback { background: #e7f3ee; padding: 0.7rem 0.8rem; }
.feedback.teacher { background: #e7eef8; }
.error, .flash-error { color: var(--danger); font-weight: 650; }
.flash { background: #e7f3ee; padding: 0.7rem 0.9rem; }
.flash-error { background: #fdecef; }
.draft { background: #fff4d6; padding: 0.6rem 0.8rem; font-weight: 700; }
.hp { position: absolute; left: -9999px; height: 1px; width: 1px; overflow: hidden; }
.order-list { list-style: none; padding: 0; }
.order-list li { display: flex; justify-content: space-between; gap: 0.5rem; align-items: center; border: 1px solid var(--line); padding: 0.4rem 0.6rem; margin: 0.3rem 0; background: white; }
.order-actions { display: flex; gap: 0.3rem; }
.hint { color: #3d4a5c; font-size: 0.95rem; }
table { width: 100%; border-collapse: collapse; background: white; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 0.45rem; vertical-align: top; }
.status-pill { display: inline-block; background: var(--ink); color: white; border-radius: 999px; padding: 0.2rem 0.7rem; }
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.fine { font-size: 0.92rem; }
.narrow { max-width: 36rem; padding-top: 2rem; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
@media (max-width: 800px) {
  .steps, .cards.three, .split, .footer-grid, .inline-form { grid-template-columns: 1fr; }
  .header-row { align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}