:root {
  --bg: #fbfaf6;
  --ink: #1c1712;
  --muted: #5c5348;
  --dim: #8a8176;
  --chop: #c45c3e;
  --rule: #1c1712;
  --paper: #f7f4ea;
  --ok: #2c5a38;
  --bad: #c45c3e;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", ui-sans-serif, system-ui, sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --mono: "SFMono-Regular", "Menlo", "Courier New", ui-monospace, monospace;
  --page: min(42rem, calc(100vw - 2.6rem));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background-color: var(--bg);
  background-image: repeating-linear-gradient(
    180deg,
    transparent 0 31px,
    rgba(28, 23, 18, 0.07) 31px 32px
  );
  font: 16px/1.8 var(--sans);
  text-rendering: optimizeLegibility;
}

button, input, textarea, select { font: inherit; color: inherit; background: var(--bg); }
a { color: var(--chop); text-underline-offset: 0.18em; }
a:hover { color: var(--ink); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--chop);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 12px;
  top: 10px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--chop);
  color: var(--bg);
  transform: translateY(-160%);
}
.skip:focus { transform: none; }

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px 4vw 10px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--rule);
}
.home {
  justify-self: start;
  color: var(--ink);
  text-decoration: none;
  font: 700 12px/1 var(--mono);
  letter-spacing: 0.1em;
}
.doc-no {
  margin: 0;
  justify-self: center;
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.16em;
}
.sits {
  justify-self: end;
  display: flex;
  gap: 10px;
}
.sits a {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  text-decoration: none;
  color: var(--chop);
  border: 2px solid var(--chop);
  font: 700 13px/1 var(--serif);
  transform: rotate(-8deg);
}
.sits a[aria-current="page"] {
  background: var(--chop);
  color: var(--bg);
}

main {
  width: var(--page);
  margin: 0 auto;
  padding: 2.8rem 0 4.5rem;
}

.kicker {
  margin: 0 0 10px;
  color: var(--chop);
  font: 700 11px/1.4 var(--mono);
  letter-spacing: 0.16em;
}
.hero h1,
.teach h2,
.work h2 {
  margin: 0 0 18px;
  font: 700 clamp(28px, 6vw, 42px)/1.22 var(--serif);
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.lede,
.teach p,
.work > p,
.catch,
.next p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.9;
  text-wrap: pretty;
}

.articles {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}
.articles li { border-bottom: 1px solid var(--rule); }
.articles a {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: 16px;
  padding: 16px 0;
  text-decoration: none;
  color: var(--ink);
}
.articles .no {
  font: 700 22px/1 var(--serif);
  color: var(--chop);
}
.articles b { display: block; font: 700 18px/1.35 var(--serif); }
.articles em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  color: var(--muted);
  font-size: 14px;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin-top: 24px;
}

.teach { padding-top: 0.6rem; }
.work {
  margin-top: 1.6rem;
  padding: 22px 0 8px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.work h2 { padding-right: 5rem; }

.chop-mark {
  position: absolute;
  top: 18px;
  right: 0;
  width: 76px;
  height: 76px;
  border: 3px solid var(--chop);
  color: var(--chop);
  display: grid;
  place-items: center;
  text-align: center;
  font: 700 13px/1.2 var(--serif);
  transform: rotate(-12deg);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
}
.chop-mark[hidden] { display: none; }

.mail {
  margin: 0 0 16px;
  padding: 16px 16px 18px;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-size: 15px;
  line-height: 1.8;
}
.mail .head {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font: 13px/1.6 var(--mono);
  color: var(--muted);
}
.mail p { margin: 0 0 10px; }

#notes-form, .baseline, .choices, .flags, .meet {
  display: grid;
  gap: 12px;
}
#notes-form label,
.baseline label {
  display: grid;
  gap: 6px;
  font-weight: 650;
}
#notes-form textarea,
.baseline input,
.baseline textarea {
  padding: 10px 12px;
  border: 0;
  border-bottom: 1px solid var(--rule);
  border-radius: 0;
  background: transparent;
  resize: vertical;
}
.baseline {
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
  margin: 8px 0 16px;
}
.baseline label:nth-child(1),
.baseline label:nth-child(5),
.baseline button { grid-column: 1 / -1; }
.baseline button { justify-self: start; min-width: 8rem; }

.promise {
  display: inline;
  margin: 0;
  padding: 0 2px;
  border: 0;
  border-bottom: 2px dotted var(--chop);
  border-radius: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: inherit;
  min-height: 0;
  cursor: pointer;
}
.promise.is-on {
  background: color-mix(in srgb, var(--chop) 18%, var(--paper));
  border-bottom-style: solid;
}
.choices button,
.meet button,
.work button[type="submit"],
#go, #nogo {
  min-height: 46px;
  padding: 10px 14px;
  text-align: left;
  border: 1px solid var(--rule);
  background: var(--bg);
  cursor: pointer;
}
.choices button:hover,
.meet button:hover,
.work button[type="submit"]:hover,
#go:hover, #nogo:hover { background: var(--paper); }
button[disabled] { opacity: 0.4; cursor: not-allowed; }
button.is-picked { border-width: 2px; }
button.is-bad { border-color: var(--bad); color: var(--bad); }
button.is-ok { border-color: var(--ok); color: var(--ok); }

.wx {
  margin: 0 0 16px;
  padding: 14px 16px;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.wx .who {
  margin: 0 0 6px;
  font: 700 12px/1 var(--mono);
  color: var(--muted);
  letter-spacing: 0.08em;
}
.wx p { margin: 0; }

.flags {
  margin: 8px 0 14px;
}
.flag {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  padding: 12px 12px;
  border: 1px solid var(--rule);
  align-items: start;
}
.flag input { margin-top: 4px; accent-color: var(--chop); }
.flag b { display: block; font: 700 15px/1.4 var(--serif); }
.flag span { color: var(--muted); font-size: 14px; }

.baseline-card {
  margin: 0 0 14px;
  padding: 16px;
  border: 1px solid var(--rule);
  display: grid;
  gap: 8px;
  font: 14px/1.5 var(--mono);
}
.baseline-card div {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 30%, transparent);
}
.baseline-card dt { color: var(--muted); }
.baseline-card dd { margin: 0; min-height: 1.4em; }
.baseline-card .empty dd {
  border-bottom: 1px dotted var(--chop);
  color: var(--chop);
}

.verdict {
  margin: 16px 0 8px;
  padding: 12px 0 12px 14px;
  border-left: 3px solid var(--chop);
  min-height: 3em;
}
.verdict.is-ok { border-color: var(--ok); }
.verdict.is-bad { border-color: var(--bad); }
.verdict[hidden] { display: none; }

.notes-status { margin: 0; color: var(--ok); font-size: 14px; }

.next {
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.next a {
  color: var(--ink);
  font: 700 13px/1 var(--mono);
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
}

.sign {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  font: 13px/1.5 var(--mono);
  color: var(--muted);
}
.sign p {
  margin: 0;
  padding-top: 28px;
  border-bottom: 1px solid var(--rule);
}

.foot {
  width: var(--page);
  margin: 0 auto;
  padding: 20px 0 48px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 2px solid var(--rule);
  color: var(--muted);
  font: 13px/1.5 var(--mono);
}
.foot strong { color: var(--ink); }
.foot a { text-decoration: none; font-weight: 700; }

.catch {
  padding: 8px 0;
  border-left: 3px solid var(--chop);
  padding-left: 12px;
  font-size: 15px;
}

@media (max-width: 720px) {
  :root { --page: calc(100vw - 1.6rem); }
  .top { grid-template-columns: 1fr auto; }
  .doc-no { display: none; }
  .baseline { grid-template-columns: 1fr; }
  .sign, .foot { grid-template-columns: 1fr; flex-direction: column; }
  .chop-mark { width: 60px; height: 60px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sits a, .chop-mark { transform: none; }
}

@media print {
  .top, .skip, .work button { display: none !important; }
  body { background: #fff; }
}