:root {
  --bg: #0e1c33;
  --line: #7ea4d9;
  --paper: #f4f7fb;
  --ink: #122038;
  --cyan: #9be7f2;
  --muted: #9bb3d0;
  --mute-paper: #4a5d78;
  --stamp: #c45c3e;
  --ok: #2f6d4f;
  --bad: #a33b32;
  --warn: #8a5a18;
  --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", ui-monospace, Menlo, Consolas, monospace;
  --page: min(44rem, calc(100vw - 2.4rem));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--muted);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(126, 164, 217, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 164, 217, 0.09) 1px, transparent 1px),
    radial-gradient(circle at 1px 1px, rgba(155, 231, 242, 0.16) 1px, transparent 1.4px);
  background-size: 28px 28px, 28px 28px, 28px 28px;
  font: 16px/1.75 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--cyan); text-underline-offset: 0.18em; }
a:hover { color: #fff; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

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

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  width: min(72rem, calc(100vw - 2rem));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 45%, transparent);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.1em;
}
.brand {
  color: var(--cyan);
  text-decoration: none;
}
.top nav { display: flex; gap: 18px; flex-wrap: wrap; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a[aria-current="page"] { color: #fff; }
.top nav a:hover { color: #fff; }

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

.kicker {
  margin: 0 0 10px;
  color: var(--cyan);
  font: 700 11px/1.4 var(--mono);
  letter-spacing: 0.14em;
}
.hero h1,
.sheet h1,
.sheet h2 {
  margin: 0 0 16px;
  color: #f4f7fb;
  font: 700 clamp(28px, 5.6vw, 46px)/1.22 var(--serif);
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.sheet h1,
.sheet h2 { color: var(--ink); }
.lede {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
  text-wrap: pretty;
}

.marks {
  display: flex;
  justify-content: space-between;
  margin: 0 0 18px;
  color: var(--line);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.16em;
}
.marks span { border: 1px solid color-mix(in srgb, var(--line) 55%, transparent); padding: 3px 7px; }

.sheet {
  position: relative;
  margin: 1.6rem 0 0;
  padding: 28px 26px 22px;
  color: var(--ink);
  background: var(--paper);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--line) 70%, #fff),
    10px 10px 0 0 rgba(155, 231, 242, 0.08);
}
.sheet::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-width: 0 22px 22px 0;
  border-style: solid;
  border-color: var(--bg) #d9e2ee transparent transparent;
}
.sheet p { margin: 0 0 14px; }
.sheet p:last-child { margin-bottom: 0; }
.sheet ul, .sheet ol { margin: 0 0 14px; padding-left: 1.2rem; }
.sheet li { margin: 6px 0; }
.sheet strong { font-weight: 700; }
.sheet code, .hero code, .calc code {
  font-family: var(--mono);
  font-size: 0.92em;
}
.sheet a { color: #1a4f8a; }
.titleblock {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 18px;
  margin-top: 22px;
  padding-top: 12px;
  border-top: 1px solid color-mix(in srgb, var(--line) 55%, #fff);
  color: var(--mute-paper);
  font: 700 10px/1.5 var(--mono);
  letter-spacing: 0.12em;
}
.titleblock b { color: var(--ink); font-size: 12px; letter-spacing: 0.08em; }

.quote {
  margin: 22px 0;
  padding: 14px 16px 14px 18px;
  border-left: 3px solid var(--cyan);
  color: #d5e4f5;
  background: color-mix(in srgb, var(--bg) 55%, #163054);
  font: 700 18px/1.5 var(--serif);
}

.path {
  margin: 2.2rem 0 0;
  display: grid;
  gap: 10px;
}
.path a {
  display: grid;
  grid-template-columns: 3.2rem 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 14px 16px;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--line) 70%, #fff);
}
.path a:hover { outline: 1px solid var(--cyan); color: var(--ink); }
.path .n {
  color: #1a4f8a;
  font: 700 12px/1.4 var(--mono);
  letter-spacing: 0.08em;
}
.path b { font: 700 17px/1.35 var(--serif); }
.path em {
  justify-self: end;
  color: var(--mute-paper);
  font: 12px/1.4 var(--sans);
  font-style: normal;
}

.desk { margin-top: 1.8rem; }
.mud {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: #e8eef6;
  border: 1px dashed #7ea4d9;
  font: 15px/1.6 var(--mono);
  color: var(--ink);
}
form.brief, form.talk { display: grid; gap: 14px; }
form.brief label, form.talk label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}
form.brief textarea, form.talk textarea, form.brief input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #b7c6d8;
  background: #fff;
  color: var(--ink);
  resize: vertical;
}
form.brief button, form.talk button, .act button, .bins button, .pick button {
  justify-self: start;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  font-weight: 700;
}
form.brief button:hover, form.talk button:hover, .act button:hover {
  background: #1a4f8a;
  border-color: #1a4f8a;
}
.note {
  margin: 10px 0 0;
  color: var(--mute-paper);
  font-size: 14px;
}
.note.is-ok { color: var(--ok); }
.note.is-bad { color: var(--bad); }

.doodles { display: grid; gap: 16px; margin-top: 8px; }
.doodle {
  padding: 16px;
  border: 1px solid #b7c6d8;
  background: #fff;
}
.doodle h3 {
  margin: 0 0 10px;
  font: 700 14px/1.3 var(--mono);
  letter-spacing: 0.08em;
}
.wire {
  margin: 0 0 12px;
  padding: 12px;
  overflow: auto;
  background: #eef3f9;
  border: 1px solid #d3deea;
  color: var(--ink);
  font: 12.5px/1.55 var(--mono);
}
.doodle fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}
.doodle legend {
  padding: 0 0 8px;
  color: var(--mute-paper);
  font: 700 11px/1.4 var(--mono);
  letter-spacing: 0.06em;
}
.doodle label { display: block; margin: 6px 0; cursor: pointer; }
.doodle.is-ok { box-shadow: inset 3px 0 0 var(--ok); }
.doodle.is-bad { box-shadow: inset 3px 0 0 var(--bad); }
.doodle.is-salad { background: repeating-linear-gradient(-45deg, #fff, #fff 8px, #f3e6e2 8px, #f3e6e2 16px); }

.calc {
  margin: 12px 0 16px;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid #b7c6d8;
  font: 14px/1.65 var(--mono);
  color: var(--ink);
}
.calc .sum { color: #1a4f8a; font-weight: 700; }

.toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 16px;
}
.toggle button {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid var(--ink);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}
.toggle button[aria-pressed="true"] {
  background: var(--stamp);
  border-color: var(--stamp);
  color: #fff;
}
.cust {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.cust article {
  padding: 14px;
  background: #fff;
  border: 1px solid #b7c6d8;
}
.cust h3 { margin: 0 0 8px; font: 700 16px/1.3 var(--serif); }
.cust .state { font: 700 12px/1.4 var(--mono); letter-spacing: 0.08em; margin-bottom: 8px; }
.cust .alive { color: var(--ok); }
.cust .hurt { color: var(--warn); }
.cust .dead { color: var(--bad); }

.reqs { display: grid; gap: 14px; }
.req {
  padding: 14px 16px;
  background: #fff;
  border: 1px solid #b7c6d8;
}
.req p { margin: 0 0 10px; }
.bins { display: flex; flex-wrap: wrap; gap: 8px; }
.bins button, .pick button {
  background: #fff;
  color: var(--ink);
  border: 1px solid #7a8aa0;
  font-weight: 650;
}
.bins button:hover, .pick button:hover { border-color: var(--ink); }
.bins button.is-on, .pick button.is-on { background: var(--ink); color: var(--paper); }
.req.is-ok { box-shadow: inset 3px 0 0 var(--ok); }
.req.is-bad { box-shadow: inset 3px 0 0 var(--bad); }

.pick { display: grid; gap: 8px; }
.pick button { text-align: left; padding: 12px 14px; min-height: 48px; }
.verdict {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--line);
  background: #fff;
}
.verdict.is-ok { border-color: var(--ok); }
.verdict.is-bad { border-color: var(--bad); }

.sitnav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin: 2.2rem 0 0;
  padding-top: 16px;
  border-top: 1px solid color-mix(in srgb, var(--line) 40%, transparent);
  font: 700 11px/1.4 var(--mono);
  letter-spacing: 0.08em;
}
.sitnav a { color: var(--muted); text-decoration: none; }
.sitnav a[aria-current="page"] { color: var(--cyan); }
.sitnav a:hover { color: #fff; }

.foot {
  width: var(--page);
  margin: 0 auto;
  padding: 22px 0 48px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid color-mix(in srgb, var(--line) 40%, transparent);
  color: var(--muted);
  font-size: 13px;
}
.foot strong { color: #f4f7fb; margin-right: 10px; }
.foot a {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.08em;
  text-decoration: none;
}

@media (max-width: 720px) {
  :root { --page: calc(100vw - 1.4rem); }
  .top { width: calc(100vw - 1.4rem); }
  .path a { grid-template-columns: 2.4rem 1fr; }
  .path em { grid-column: 2; justify-self: start; }
  .cust { grid-template-columns: 1fr; }
  .foot { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  .top, .skip, .sitnav, form.brief button, .toggle, .bins, .pick { display: none !important; }
  body { background: #fff; color: #111; }
  .sheet, .path a, .doodle, .req, .cust article { box-shadow: none; background: #fff; color: #111; }
  .hero h1 { color: #111; }
  a { color: inherit; }
}