:root {
  color-scheme: dark;
  --ink: #080a0f;
  --ink-2: #0d1119;
  --paper: #f4f0e5;
  --paper-2: #ece6d8;
  --muted: #aeb4c4;
  --dim: #7f8798;
  --line: rgba(244, 240, 229, 0.15);
  --mint: #69e6c7;
  --violet: #a98cff;
  --amber: #ffc26c;
  --red: #ff7b72;
  --ring: #ffc26c;
  --measure: 76rem;
  --radius: 1rem;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: Iowan Old Style, Palatino Linotype, Book Antiqua, Palatino, Georgia, "Songti SC", serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 2%, rgba(105, 230, 199, 0.08), transparent 30rem),
    radial-gradient(circle at 12% 26%, rgba(169, 140, 255, 0.06), transparent 34rem),
    var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-underline-offset: 0.2em; }
button { font: inherit; }
code { font-family: var(--mono); }
:focus-visible { outline: 0.18rem solid var(--ring); outline-offset: 0.2rem; }
[hidden] { display: none !important; }
.hid { display: none; }
.sr-live {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0;
}
.shell { width: min(calc(100% - 2rem), var(--measure)); margin-inline: auto; }

.skip {
  position: fixed; z-index: 100; top: 0.75rem; left: 0.75rem;
  padding: 0.7rem 1rem; background: var(--paper); color: var(--ink);
  transform: translateY(-180%);
}
.skip:focus { transform: translateY(0); }

/* ---------- header + status line ---------- */

.site-header {
  min-height: 4.25rem; display: flex; align-items: center;
  justify-content: space-between; gap: 1rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.7rem;
  text-decoration: none; font-weight: 720; letter-spacing: -0.02em;
}
.brand-mark { width: 1.75rem; height: 1.75rem; }
.brand-mark path, .brand-mark line { stroke: var(--mint); stroke-width: 1.2; fill: none; }
.brand-mark circle { fill: var(--paper); }
.site-nav { display: flex; align-items: center; gap: 1.1rem; }
.site-nav > a { color: var(--muted); font-size: 0.86rem; text-decoration: none; }
.site-nav > a:hover { color: var(--paper); }
.language-link {
  min-height: 2.25rem; display: inline-flex; align-items: center;
  border: 1px solid var(--line); border-radius: 99rem;
  padding: 0.3rem 0.7rem; color: var(--paper) !important;
}

.statusline {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  margin: 0 auto; padding: 0.7rem 0 1.1rem;
  border-bottom: 1px solid var(--line);
  color: var(--dim); font: 0.72rem/1.5 var(--mono);
}
.statusline i { color: rgba(244, 240, 229, 0.25); font-style: normal; }
.statusline a { color: var(--amber); }

/* ---------- hero ---------- */

/* ---------- hero band: plate, scrim, copy, glyph, receipt rail ---------- */

.hero-band { position: relative; isolation: isolate; min-height: min(78vh, 44rem); overflow: hidden; }
.hero-plate { position: absolute; z-index: 0; inset: 0; margin: 0; }
.hero-plate img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 50%; display: block; }
/* The baked-in darkening is tuned for one crop; object-fit moves it. This scrim
   is what actually guarantees the measured contrast — keep it in lockstep with
   the alpha() ramp in tools/hero_plate.py. */
.hero-band::after {
  content: ""; position: absolute; z-index: 1; inset: 0; pointer-events: none;
  background:
    linear-gradient(100deg, rgba(5,7,12,.97) 0%, rgba(5,7,12,.94) 30%, rgba(5,7,12,.60) 52%, rgba(5,7,12,.16) 78%, rgba(5,7,12,.32) 100%),
    linear-gradient(to top, rgba(5,7,12,.96) 0%, rgba(5,7,12,.90) 14%, rgba(5,7,12,0) 26%);
}
.plate-tag {
  position: absolute; z-index: 3; top: 1rem; right: 1rem;
  padding: 0.28rem 0.6rem; border: 1px solid var(--line); border-radius: 0.4rem;
  background: rgba(5, 7, 12, 0.8); color: var(--muted);
  font: 650 0.6rem var(--mono); letter-spacing: 0.08em;
}
.hero-inner { position: relative; z-index: 2; padding-block: clamp(1rem, 2.4vw, 1.8rem) clamp(1rem, 2vw, 1.6rem); }
/* Anything wider pushes the receipt rail below the fold and the composition dies. */
h1 { max-width: 26ch; margin: 0; font: 500 clamp(2.05rem, 4.2vw, 3.3rem)/1.05 var(--serif); letter-spacing: -0.03em; text-wrap: balance; }
html[lang="zh-Hans"] h1 { letter-spacing: 0; }
.hero-deck { max-width: 46rem; margin: 0.75rem 0 0; color: var(--paper); font-size: clamp(1.05rem, 1.7vw, 1.32rem); }
.hero-fine { max-width: 52rem; margin: 0.5rem 0 0; color: var(--muted); font: 0.72rem/1.6 var(--mono); }
.k4-card {
  position: absolute; z-index: 2; right: 2rem; top: 3rem; width: 13rem;
  padding: 1.1rem; border: 1px solid var(--line); border-radius: 1rem;
  background: rgba(5, 7, 12, 0.72); text-align: center;
}
.k4-glyph { width: 100%; height: auto; display: block; }
.k4-glyph path { fill: rgba(105, 230, 199, 0.05); stroke: rgba(244, 240, 229, 0.42); stroke-width: 0.8; }
.k4-glyph line { stroke: rgba(244, 240, 229, 0.42); stroke-width: 0.8; }
.k4-glyph line.collide { stroke: var(--amber); stroke-width: 1.8; }
.k4-glyph .c-mint { fill: var(--mint); }
.k4-glyph .c-violet { fill: var(--violet); }
.k4-glyph .c-amber { fill: var(--amber); }
.k4-card p { margin: 0.8rem 0 0; color: var(--muted); font: 0.66rem/1.6 var(--mono); }
.k4-card span { display: block; margin-top: 0.3rem; color: var(--amber); }
.hero-rail {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem; align-items: end; margin-top: clamp(0.7rem, 1.4vw, 1rem);
  padding-top: 0.8rem; border-top: 1px solid var(--line);
}
.rail-notes p { margin: 0 0 0.25rem; font: 0.72rem/1.6 var(--mono); }
.rn-lead { color: var(--muted); }
.rn-ghost { color: var(--violet); }
.rn-tag { color: var(--amber); }
.hero-foot { padding-block: 1.5rem 0; }
.plate-note { max-width: 62rem; margin: 0; color: var(--dim); font: 0.72rem/1.7 var(--mono); }
.plate-note a { color: var(--amber); }
.hero-lede {
  max-width: 47rem; margin: 0.85rem 0 0;
  font-size: clamp(1.02rem, 1.5vw, 1.2rem); color: #d3d8e2; text-wrap: pretty;
}
.hero-lede strong { color: var(--mint); font-family: var(--mono); font-weight: 600; letter-spacing: -0.01em; }
.hero-body { max-width: 47rem; margin: 0.7rem 0 0; color: var(--muted); font-size: 0.98rem; }
.hero-caveat {
  max-width: 62rem; margin: 1.2rem 0 0; padding-left: 0.9rem;
  border-left: 2px solid var(--amber); color: var(--muted); font-size: 0.88rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 0.9rem; }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }
.chip {
  border: 1px solid var(--line); border-radius: 0.6rem; padding: 0.5rem 0.75rem;
  background: rgba(255, 255, 255, 0.03);
}
.chip span { display: block; color: var(--dim); font: 0.66rem var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.chip strong { display: block; margin-top: 0.2rem; font-size: 0.88rem; font-weight: 600; }

.button {
  min-height: 2.9rem;
  --line-interactive: rgba(244, 240, 229, 0.42); display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem; border: 1px solid var(--line-interactive); border-radius: 99rem;
  padding: 0.65rem 1.1rem; color: var(--paper); background: transparent;
  text-decoration: none; font-weight: 650; cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}
.button.primary { border-color: var(--mint); color: var(--ink); background: var(--mint); }
.button:hover { border-color: rgba(105, 230, 199, 0.7); }
.button[aria-disabled="true"] { opacity: 0.6; cursor: default; }
.button[aria-disabled="true"]:hover { border-color: var(--line-interactive); }

/* ---------- the digit ruler ---------- */

.ruler { display: grid; gap: 0.35rem; }
.rrow { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; }
.rlab {
  flex: 0 0 4.5rem; color: var(--dim);
  font: 0.66rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
}
.rnum {
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  font-size: 1.05rem; letter-spacing: 0.01em; word-break: break-all;
}
.ruler-hero .rnum { font-size: clamp(1.1rem, 2.3vw, 1.6rem); }
.ruler-hero .rlab { flex-basis: 4.5rem; }
@media (max-width: 560px) { .ruler-hero .rlab { flex-basis: 100%; } }
.d-lit { color: var(--mint); }
.d-ghost { color: var(--violet); opacity: 0.85; }
.d-flat { color: var(--muted); }
.dp { color: var(--dim); }
.d-cut { border-left: 2px solid var(--amber); margin-left: 0.18em; padding-left: 0.18em; }
.dsig { margin-left: 0.45em; color: var(--dim); font-size: 0.8em; }
.dx { margin-left: 0.2em; color: var(--muted); font-size: 0.72em; }
.dexact { margin-left: 0.5em; color: var(--mint); font-size: 0.7em; }
.dinf { color: var(--violet); opacity: 0.85; }
.rcut {
  margin: 0.15rem 0 0; padding-left: 0.6rem; border-left: 2px solid var(--amber);
  color: var(--dim); font: 0.66rem/1.5 var(--mono);
}
.hero-figure { margin: 0; min-width: 0; }
.hero-figure figcaption {
  margin-top: 0.9rem; color: var(--dim); font: 0.7rem/1.6 var(--mono);
}
.ghost-key { color: var(--violet); }

/* ---------- sections ---------- */

section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section-head { display: grid; grid-template-columns: minmax(9rem, 0.5fr) minmax(0, 1.5fr); gap: 1.5rem; align-items: start; }
.section-number { color: var(--mint); font: 0.7rem var(--mono); letter-spacing: 0.1em; }
h2 { max-width: 20ch; margin: 0; font: 500 clamp(1.9rem, 4vw, 3.4rem)/1.05 var(--serif); letter-spacing: -0.03em; text-wrap: balance; }
.section-intro { max-width: 48rem; margin: 1.1rem 0 0; color: var(--muted); font-size: 1.02rem; }
.section-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.7rem; }

.tag { display: inline-flex; align-items: center; gap: 0.4rem; font: 650 0.66rem var(--mono); letter-spacing: 0.08em; }
.tag::before { content: ""; width: 0.45rem; height: 0.45rem; border-radius: 50%; background: currentColor; }
.tag.established { color: var(--mint); }
.tag.supported { color: var(--violet); }
.tag.open { color: var(--amber); }

/* ---------- 01 the object ---------- */

.beats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2.5rem; }
.beat {
  display: flex; gap: 0.9rem; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.3rem; background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
}
.beat-n { color: var(--mint); font: 500 2rem/1 var(--serif); }
.beat h3 { margin: 0.5rem 0 0.5rem; font-size: 1.08rem; }
.beat p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.tagkey { margin-top: 2rem; padding: 1.2rem 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255, 255, 255, 0.02); }
.tagkey h3 { margin: 0 0 0.9rem; font-size: 0.98rem; }
.tagkey dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 0; }
.tagkey dt { margin-bottom: 0.4rem; }
.tagkey dd { margin: 0; color: var(--muted); font-size: 0.85rem; }
.counts { margin: 1.5rem 0 0; color: var(--dim); font: 0.78rem/1.6 var(--mono); }

.grid-block { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr); gap: clamp(1.5rem, 4vw, 3rem); margin-top: 3rem; align-items: start; }
.grid-copy h3 { margin: 0 0 0.6rem; font-size: 1.15rem; }
.grid-copy > p { margin: 0 0 1.2rem; color: var(--muted); font-size: 0.92rem; }
.qfilters { display: grid; grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr)); gap: 0.5rem; }
.qfilter {
  border: 1px solid rgba(244, 240, 229, 0.42); border-radius: 0.6rem; padding: 0.6rem 0.7rem;
  background: rgba(255, 255, 255, 0.025); color: var(--muted); text-align: left; cursor: pointer;
}
.qfilter[aria-pressed="true"] { border-color: var(--mint); background: rgba(105, 230, 199, 0.08); color: var(--paper); }
.qfilter strong { display: block; font: 500 1.35rem/1 var(--serif); color: var(--paper); }
.qfilter span { display: block; margin-top: 0.25rem; font-size: 0.74rem; }
.qfilter em { display: block; color: var(--dim); font: 0.66rem var(--mono); font-style: normal; }
.qmean { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem; margin: 1.2rem 0; color: var(--muted); font-size: 0.82rem; }
.qmean strong { color: var(--mint); font: 500 1.3rem/1 var(--serif); }
.qmean em { color: var(--dim); font: 0.72rem var(--mono); font-style: normal; }
.qlive { margin: 1rem 0 0; color: var(--paper); font-size: 0.88rem; }
.caveat { margin: 1.2rem 0 0; padding-left: 0.9rem; border-left: 2px solid var(--violet); color: var(--dim); font-size: 0.82rem; }

.grid-figure { margin: 0; }
.grid81 { width: 100%; height: auto; display: block; }
.te line { stroke: rgba(244, 240, 229, 0.34); stroke-width: 1; }
.st .me { stroke: var(--red); stroke-width: 2.2; transition: stroke-width 180ms ease; }
.q0 { fill: var(--mint); }
.q1 { fill: var(--violet); }
.q2 { fill: var(--amber); }
.st { transition: opacity 180ms ease; }
.st.dim { opacity: 0.1; }
.st.swept .me { stroke-width: 4; }

/* ---------- 02 the ledger ---------- */

.legend {
  margin-top: 2.5rem; padding: 1rem 1.2rem; border-left: 3px solid var(--amber);
  background: rgba(255, 194, 108, 0.06); color: var(--muted); font-size: 0.9rem;
}
.legend strong { color: var(--paper); }
.lane { margin: 3rem 0 0; font: 650 0.72rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--mint); }
.lane-cut { padding-top: 2rem; border-top: 1px dashed var(--line); color: var(--amber); }
.lane-note { max-width: 52rem; margin: 0.6rem 0 0; color: var(--dim); font-size: 0.84rem; }
.lgrid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.2rem; }
.lrow {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem;
  background: rgba(255, 255, 255, 0.022); transition: opacity 180ms ease, border-color 180ms ease;
}
.lrow.dark { border-color: var(--red); background: rgba(255, 123, 114, 0.06); }
.lrow.dark .rnum, .lrow.dark .lpull { text-decoration: line-through; text-decoration-color: var(--red); }
.lstate { display: none; }
.lrow.dark .lstate {
  display: block; margin: 0 0 0.6rem; color: var(--red);
  font: 650 0.66rem var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
}
.lrow-worst { border-color: rgba(255, 123, 114, 0.45); background: rgba(255, 123, 114, 0.05); }
.lhead { display: flex; align-items: baseline; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.8rem; }
.lhead h3 { margin: 0; font: 500 1.15rem var(--mono); letter-spacing: -0.01em; }
.lpull { color: var(--mint); font: 650 0.86rem var(--mono); }
.lrow-worst .lpull { color: var(--red); }
.lpull-open { color: var(--violet); }
.pullbar { width: 100%; height: 10px; display: block; margin-top: 0.8rem; }
.pb-track { fill: rgba(244, 240, 229, 0.12); }
.pb-fill { fill: var(--mint); }
.pb-bad { fill: var(--red); }
.ldiag { margin: 0.2rem 0; color: var(--muted); font-size: 0.86rem; }
.ldiag span { display: inline-block; min-width: 4.5rem; color: var(--dim); font: 0.66rem var(--mono); text-transform: uppercase; letter-spacing: 0.06em; }
.lnote { margin: 0.7rem 0 0; color: var(--dim); font-size: 0.8rem; }
.ltype { margin: 0.8rem 0 0; color: var(--dim); font: 0.7rem/1.6 var(--mono); }
.cond { color: var(--amber); }

/* ---------- 03 check it ---------- */

.check-it { background: var(--ink-2); }
.check-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr); gap: clamp(1.5rem, 4vw, 3rem); margin-top: 2.5rem; align-items: start; }
.check-body { margin: 0; font-size: 1.02rem; }
.check-counter { margin: 1.2rem 0 0; padding-left: 0.9rem; border-left: 2px solid var(--amber); color: var(--muted); font-size: 0.92rem; }
.steps { margin: 0; padding: 0; list-style: none; font-family: var(--mono); font-size: clamp(1.2rem, 3vw, 1.8rem); }
.steps li { padding: 0.15rem 0; color: var(--mint); }
.step-bar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0 0; }
.check-measured { margin: 1.5rem 0 0.3rem; }
.check-measured span { display: block; color: var(--dim); font: 0.66rem var(--mono); text-transform: uppercase; letter-spacing: 0.06em; }
.check-measured code { font-size: 1.05rem; }
.check-contains { margin: 0; color: var(--mint); font-size: 0.85rem; }

/* ---------- 04 inputs (the accounting document) ---------- */

.inputs { background: var(--paper); color: #11141c; --ring: #8a4a10; }
.inputs .section-number { color: #08594c; }
.inputs .tag.established { color: #087663; }
.inputs .tag.open { color: #a44b25; }
.input-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1.5rem, 4vw, 3rem); margin-top: 2.5rem; }
.col-closed { padding-top: 1rem; border-top: 2px solid #087663; }
.col-open { padding-top: 1rem; border-top: 2px solid #a44b25; }
.input-cols h3 { margin: 0.8rem 0 0.8rem; font-size: 1.2rem; }
.input-cols p { margin: 0 0 1rem; color: #4d5566; font-size: 0.93rem; }
.input-cols ol { margin: 0; padding-left: 1.2rem; color: #4d5566; font-size: 0.93rem; }
.input-cols li + li { margin-top: 0.8rem; }
.invitation { margin: 2.5rem 0 0; padding: 1rem 1.2rem; border-left: 3px solid #a44b25; background: rgba(164, 75, 37, 0.07); color: #11141c; font-size: 0.95rem; }

/* ---------- 05 route ---------- */

.stations { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; margin: 2.5rem 0 0; padding: 0; list-style: none; }
.station {
  padding: 1rem 0.9rem; border: 1px solid var(--line); border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.025); transition: opacity 180ms ease;
}
.station[data-state="conditional"] { border-style: dashed; border-color: rgba(255, 194, 108, 0.4); }
.station strong { display: block; margin-top: 0.3rem; font-size: 0.95rem; }
.st-n { color: var(--mint); font: 0.66rem var(--mono); }
.st-sub { display: block; margin-top: 0.3rem; color: var(--dim); font-size: 0.76rem; }
.route.killed .station[data-state="conditional"] { opacity: 0.2; }
.main-bridge { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; margin: 1.5rem 0 0; color: var(--muted); font-size: 0.85rem; }
.gaps { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 0.8rem; margin-top: 2rem; }
.gap {
  padding: 1rem; border: 1px dashed rgba(255, 194, 108, 0.62); border-radius: 0.7rem;
  background: rgba(255, 194, 108, 0.04);
}
.gap-toggle {
  min-height: 2.75rem; margin-top: 0.8rem; width: 100%;
  border: 1px solid rgba(255, 194, 108, 0.62); border-radius: 0.5rem;
  padding: 0.5rem 0.8rem; background: transparent; color: var(--amber);
  font: 650 0.72rem var(--mono); cursor: pointer;
}
.gap-toggle[aria-pressed="true"] { background: rgba(255, 194, 108, 0.16); color: var(--paper); }
.gap.on { border-style: solid; border-color: var(--amber); background: rgba(255, 194, 108, 0.1); }
.gap-code { color: var(--amber); font: 650 0.8rem var(--mono); }
.gap p { margin: 0.5rem 0 0; color: var(--muted); font-size: 0.85rem; }
.gap-carries { color: var(--dim) !important; font: 0.72rem var(--mono) !important; }
.gap-carries code { color: var(--paper); }
.killswitch { margin-top: 2.5rem; }
.killswitch-note { max-width: 52rem; margin: 1rem 0 0; color: var(--muted); font-size: 0.92rem; }

/* ---------- 06 falsifiers ---------- */

.kill { background: var(--ink-2); }
.kgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2.5rem; }
.kcard { border: 1px solid var(--line); border-top: 2px solid var(--red); border-radius: 0.7rem; padding: 1.2rem; background: rgba(255, 255, 255, 0.022); }
.kcard h3 { margin: 0 0 0.7rem; font-size: 1.05rem; }
.kclaim { margin: 0 0 0.7rem; color: var(--muted); font-size: 0.88rem; }
.kthreshold { margin: 0; color: var(--red); font-size: 0.88rem; }
.knote { margin: 0.7rem 0 0; color: var(--dim); font-size: 0.8rem; }
.kwhere { margin: 0.9rem 0 0; color: var(--mint); font: 0.7rem var(--mono); letter-spacing: 0.05em; }
.stamp { margin: 2rem 0 0; color: var(--dim); font: 0.7rem var(--mono); }

/* ---------- 07 not derived ---------- */

.nd-list { max-width: 56rem; margin: 1.5rem 0 0; padding-left: 1.3rem; color: var(--muted); }
.nd-list li { margin-bottom: 0.9rem; font-size: 0.94rem; }
.nd-list strong { color: var(--paper); }
.sub-title { margin: 3rem 0 0; font-size: 1.2rem; }
.subs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1.2rem; }
.sub { border: 1px solid var(--line); border-radius: 0.7rem; padding: 1.1rem; background: rgba(255, 255, 255, 0.022); }
.sub-id { color: var(--mint); font: 650 0.72rem var(--mono); letter-spacing: 0.06em; }
.sub h4 { margin: 0.5rem 0 0.6rem; font-size: 0.98rem; font-weight: 600; }
.sub-meta { margin: 0; color: var(--muted); font-size: 0.84rem; }
.sub-meta strong { color: var(--amber); }
.sub-prior { margin: 0.7rem 0 0; color: var(--dim); font-size: 0.8rem; }

/* ---------- 08 machine ---------- */

.machine { background: var(--ink-2); }
.mfigures { max-width: 56rem; margin: 1.5rem 0 0; color: var(--muted); font-size: 0.96rem; }
.mfigures strong { color: var(--mint); }
.mbar { width: 100%; height: 34px; display: block; margin-top: 1.8rem; border-radius: 3px; overflow: hidden; }
.seg-a { fill: var(--mint); }
.seg-b { fill: var(--amber); }
.seg-c { fill: #c98a3a; }
.seg-d { fill: #6b7386; }
.mkeys { display: flex; flex-wrap: wrap; gap: 1.2rem; margin: 1rem 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 0.78rem; }
.mkeys li { display: flex; align-items: center; gap: 0.4rem; }
.key { width: 0.7rem; height: 0.7rem; border-radius: 2px; display: inline-block; }
.key.seg-a { background: var(--mint); }
.key.seg-b { background: var(--amber); }
.key.seg-c { background: #c98a3a; }
.key.seg-d { background: #6b7386; }
.mnote { margin: 0.9rem 0 0; color: var(--amber); font-size: 0.85rem; }
.meaning { margin-top: 2rem; padding: 1.2rem 1.4rem; border-left: 3px solid var(--violet); background: rgba(169, 140, 255, 0.06); }
.meaning p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.meaning em { color: var(--paper); font-style: normal; font-weight: 600; }

/* ---------- 09 verify ---------- */

.sha { margin: 1.2rem 0 0; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: 0.6rem; background: rgba(0, 0, 0, 0.35); overflow-x: auto; }
.sha code { color: var(--mint); font-size: 0.78rem; white-space: pre; }
.frozen { max-width: 52rem; margin: 1.2rem 0 0; color: var(--muted); font-size: 0.94rem; }
.vlinks { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 0.7rem; margin: 2rem 0 0; padding: 0; list-style: none; }
.vlinks a { display: block; padding: 0.9rem 1rem; border: 1px solid var(--line); border-radius: 0.6rem; text-decoration: none; background: rgba(255, 255, 255, 0.022); }
.vlinks a:hover { border-color: rgba(105, 230, 199, 0.6); }
.vlinks strong { display: block; font-size: 0.92rem; }
.vlinks span { display: block; margin-top: 0.25rem; color: var(--dim); font-size: 0.78rem; }
.defect { margin-top: 2rem; padding: 1rem 1.2rem; border-left: 3px solid var(--amber); background: rgba(255, 194, 108, 0.06); color: var(--muted); font-size: 0.88rem; }

/* ---------- 10 attack + person ---------- */

.targets, .depths { margin: 2rem 0 0; padding: 0; list-style: none; }
.targets li + li { margin-top: 0.5rem; }
.targets a { display: flex; flex-wrap: wrap; gap: 0.2rem 1rem; padding: 0.8rem 1rem; border: 1px solid var(--line); border-radius: 0.6rem; text-decoration: none; background: rgba(255, 255, 255, 0.022); }
.targets a:hover { border-color: rgba(105, 230, 199, 0.6); }
.targets strong { flex: 0 0 9rem; color: var(--mint); font: 650 0.8rem var(--mono); }
.targets span { flex: 1 1 18rem; color: var(--muted); font-size: 0.88rem; }
.depths { display: flex; flex-wrap: wrap; gap: 1.5rem; color: var(--muted); font-size: 0.88rem; }
.depths li { flex: 1 1 14rem; }
.depth-time { display: block; color: var(--mint); font: 0.7rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase; }
.person { margin-top: 3.5rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.person h3 { margin: 0 0 0.8rem; font-size: 1.1rem; }
.person-name { margin: 0 0 0.7rem; font: 500 1.5rem var(--serif); }
.person ul { margin: 0; padding-left: 1.2rem; color: var(--muted); font-size: 0.9rem; }
.person-links { margin: 1rem 0 0; color: var(--muted); font: 0.82rem var(--mono); }

/* ---------- footer ---------- */

footer { border-top: 1px solid var(--line); padding-block: 2.5rem 3.5rem; color: var(--muted); font-size: 0.82rem; }
.footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 2rem; }
footer p { max-width: 54rem; margin: 0 0 0.6rem; }
.footer-sub { color: var(--dim); font-size: 0.76rem; }
.no-mint { font-family: var(--mono); }
footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- gate, notice, 404 ---------- */

.language-gate { min-height: 100svh; display: grid; place-items: center; padding: 2rem; text-align: center; }
.language-gate-inner { max-width: 46rem; }
.language-gate h1 { max-width: 16ch; margin-inline: auto; }
.language-gate p { color: var(--muted); font-size: 1.02rem; }
.language-gate .hero-actions { justify-content: center; }
.eyebrow { margin: 1rem 0 1rem; color: var(--mint); font: 650 0.7rem var(--mono); letter-spacing: 0.14em; }
.gate-num { margin-top: 2.5rem; }
.gate-num code { display: block; color: var(--mint); font-size: clamp(0.85rem, 2.4vw, 1.15rem); }
.gate-num span { display: block; margin-top: 0.4rem; color: var(--dim); font: 0.7rem var(--mono); }

.notice-page { min-height: 100svh; display: grid; place-items: center; padding: 3rem 1.5rem; }
.notice-inner { max-width: 44rem; }
.notice-inner h1 { max-width: 20ch; margin: 1.5rem 0 1.5rem; font-size: clamp(2rem, 5vw, 3rem); }
.notice-inner p { color: var(--muted); margin: 0 0 1rem; }
.notice-contact { font-family: var(--mono); font-size: 0.85rem; }

/* ---------- responsive ---------- */

@media (max-width: 1000px) {
  .stations { grid-template-columns: repeat(2, 1fr); }
  .kgrid { grid-template-columns: repeat(2, 1fr); }
  .beats { grid-template-columns: 1fr; }
}

@media (max-width: 1000px) {
  .tagkey dl { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .k4-card { display: none; }
  .hero-rail { grid-template-columns: 1fr; gap: 1rem; }
}

@media (max-width: 719px) {
  /* Ratio is necessary but not sufficient over a high-frequency texture. Rather
     than offsetting the copy by a magic number that breaks at some width, the
     plate joins the flow: everything after it is below it by construction. */
  .hero-band { min-height: 0; overflow: visible; }
  .hero-plate { position: relative; inset: auto; height: 19rem; }
  .hero-plate img { object-position: 50% 82%; }
  /* No copy sits over the plate on mobile, so the scrim only needs to carry the
     tag and fade the band into the page. */
  .hero-band::after {
    inset: 0 0 auto 0; height: 19rem;
    background:
      linear-gradient(180deg, rgba(5,7,12,.72) 0%, rgba(5,7,12,.10) 22%, rgba(5,7,12,0) 55%),
      linear-gradient(to top, var(--ink) 0, rgba(8,10,15,0) 4rem);
  }
  .hero-inner { padding-top: 1.2rem; }
  .hero-fine { color: var(--muted); }
  .plate-tag { top: 0.75rem; right: 0.75rem; }
}

@media (max-width: 820px) {
  .site-header { flex-wrap: wrap; padding-bottom: 0.6rem; }
  .site-nav { order: 3; flex-basis: 100%; flex-wrap: wrap; gap: 0.5rem 1rem; }
  .site-nav > a { font-size: 0.8rem; }
  .hero { grid-template-columns: 1fr; gap: 2rem; }
  .grid-block, .check-grid, .input-cols { grid-template-columns: 1fr; }
  .section-head { grid-template-columns: 1fr; gap: 0.8rem; }
  .lgrid, .subs { grid-template-columns: 1fr; }
  .footer-row { flex-direction: column; }
  .grid-figure { max-width: 26rem; }
}

@media (max-width: 560px) {
  .shell { width: min(calc(100% - 1.25rem), var(--measure)); }
  .stations, .kgrid { grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .rlab { flex-basis: 100%; }
  .ruler-hero .rnum { font-size: 1.35rem; }
  .targets strong { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (forced-colors: active) {
  .k4-glyph path, .k4-glyph line { stroke: CanvasText; }
  .k4-glyph circle { fill: CanvasText; }
  .d-lit, .d-ghost, .d-flat { color: CanvasText; }
  .te line, .st .me { stroke: CanvasText; }
  .pb-fill, .pb-track, .seg-a, .seg-b, .seg-c, .seg-d { fill: CanvasText; }
}