/* FLOOR TIERS — a survey plate. Hairlines, monospace annotations, and the strata doing the
   colouring. Nothing rounded: this is a drawing, not a card deck. */

:root {
  --ink: #0b0b0d;
  --plate: #121215;
  --plate-2: #17171b;
  --rule: #26262c;
  --rule-2: #34343c;
  --paper: #e7e7ea;
  --dim: #8a8b93;
  --dimmer: #5c5d65;

  --slate: #5a5b62;
  --slate-d: #3c3d42;
  --azurite: #3d6398;
  --azurite-d: #2c4a72;
  --amethyst: #6a4a80;
  --amethyst-d: #4a3358;
  --gold: #c9962e;
  --gold-d: #8a6a24;

  --shell: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: "Archivo", ui-sans-serif, sans-serif;
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* the plate grid, printed faintly behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: linear-gradient(var(--rule) 1px, transparent 1px), linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 100% 44px, 44px 100%;
  opacity: 0.32;
}

h1, h2, h3 { font-family: "Archivo", sans-serif; font-weight: 600; line-height: 1.05; margin: 0; letter-spacing: -0.015em; }
code, .mono, .num { font-family: "IBM Plex Mono", ui-monospace, monospace; }

a { color: var(--gold); text-underline-offset: 3px; }
a:hover { color: #e0b04a; }

.shell { max-width: var(--shell); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ── top ─────────────────────────────────────────────────────────────────── */

.top {
  position: sticky; top: 0; z-index: 40;
  background: rgba(11, 11, 13, 0.94);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(8px) saturate(140%);
}
.top-inner { max-width: var(--shell); margin: 0 auto; padding: 12px 24px; display: flex; align-items: center; gap: 20px; }
.mark { display: flex; align-items: center; gap: 11px; color: var(--paper); text-decoration: none; font-weight: 600; letter-spacing: 0.02em; }
.mark canvas { width: 15px; height: 34px; display: block; }
.tabs { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a {
  color: var(--dim); text-decoration: none; text-transform: uppercase; letter-spacing: 0.13em;
  font-family: "IBM Plex Mono", monospace; font-size: 11px; padding: 8px 13px; white-space: nowrap;
  border: 1px solid transparent;
}
.tabs a:hover { color: var(--paper); }
.tabs a.on { color: var(--gold); border-color: var(--rule-2); background: var(--plate); }
.wallet { margin-left: auto; display: flex; gap: 10px; align-items: center; }

.btn {
  font-family: "IBM Plex Mono", monospace; font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 9px 16px; border: 1px solid var(--rule-2); background: transparent; color: var(--paper);
  cursor: pointer; text-decoration: none; display: inline-block;
}
.btn:hover { border-color: var(--gold); color: var(--gold); }
.btn.solid { background: var(--gold); border-color: var(--gold); color: #14100a; font-weight: 600; }
.btn.solid:hover { background: #e0b04a; color: #14100a; }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.pill { font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.1em; padding: 5px 10px; border: 1px solid var(--rule-2); color: var(--dim); }
.pill.bad { color: var(--gold); border-color: var(--gold-d); cursor: pointer; }

/* ── page frame ──────────────────────────────────────────────────────────── */

#view { min-height: 60vh; display: block; }
.page { max-width: var(--shell); margin: 0 auto; padding: 0 24px 100px; }

.plate-head { padding: 56px 0 34px; border-bottom: 1px solid var(--rule); margin-bottom: 34px; }
.plate-no {
  font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 16px;
}
.plate-head h1 { font-size: clamp(34px, 5vw, 58px); max-width: 20ch; }
.plate-head h1 em { font-style: normal; color: var(--dim); }
.plate-head .lede { color: var(--dim); font-size: 17px; margin: 20px 0 0; max-width: 68ch; }
.lede strong { color: var(--paper); font-weight: 500; }

.banner { padding: 14px 18px; border-left: 2px solid var(--gold); background: rgba(201, 150, 46, 0.06); font-size: 14.5px; color: var(--dim); margin: 22px 0; }
.banner b { color: var(--paper); font-weight: 600; }
.banner.info { border-left-color: var(--azurite); background: rgba(61, 99, 152, 0.07); }

/* ── the readouts ────────────────────────────────────────────────────────── */

.readout { display: grid; grid-template-columns: repeat(auto-fit, minmax(165px, 1fr)); border: 1px solid var(--rule); background: var(--plate); }
.readout > div { padding: 15px 18px; border-right: 1px solid var(--rule); }
.readout > div:last-child { border-right: 0; }
.readout dt { font-family: "IBM Plex Mono", monospace; font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dimmer); margin: 0 0 8px; }
.readout dd { margin: 0; font-family: "IBM Plex Mono", monospace; font-size: 21px; color: var(--paper); }
.readout dd small { font-size: 11px; color: var(--dimmer); }
.ph { color: var(--rule-2); }

/* ── figures ─────────────────────────────────────────────────────────────── */

.figure { border: 1px solid var(--rule); background: var(--plate); padding: 0; position: relative; overflow: hidden; }
.figure canvas { display: block; width: 100%; }
.figure-cap {
  font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dimmer); padding: 11px 16px; border-top: 1px solid var(--rule);
}
.figure-tag { position: absolute; top: 10px; right: 16px; font-family: "IBM Plex Mono", monospace; font-size: 10px; letter-spacing: 0.2em; color: var(--dimmer); }

/* ── prose ───────────────────────────────────────────────────────────────── */

section { padding: 60px 0 0; }
h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.sub { color: var(--dim); max-width: 66ch; margin: 0 0 26px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.card { border: 1px solid var(--rule); background: var(--plate); padding: 22px; }
.card h3 { font-size: 19px; margin-bottom: 9px; }
.card p { margin: 0; color: var(--dim); font-size: 14.5px; }
.card .k { font-family: "IBM Plex Mono", monospace; font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dimmer); display: block; margin-bottom: 12px; }

/* ── the strata table ────────────────────────────────────────────────────── */

table { width: 100%; border-collapse: collapse; font-family: "IBM Plex Mono", monospace; font-size: 13px; }
th, td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--rule); }
th { color: var(--dimmer); font-weight: 400; font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; }
td.name { color: var(--paper); }
.swatch { display: inline-block; width: 10px; height: 10px; margin-right: 9px; vertical-align: middle; }
tr.t0 .swatch { background: var(--slate); }
tr.t1 .swatch { background: var(--azurite); }
tr.t2 .swatch { background: var(--amethyst); }
tr.t3 .swatch { background: var(--gold); }
tr.t3 td.name { color: var(--gold); }

/* ── the exit desk ───────────────────────────────────────────────────────── */

.desk { display: grid; grid-template-columns: 340px 1fr; gap: 20px; }
.controls { border: 1px solid var(--rule); background: var(--plate); padding: 22px; }
.controls label { display: block; font-family: "IBM Plex Mono", monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dimmer); margin: 18px 0 8px; }
.controls label:first-child { margin-top: 0; }
.controls label b { float: right; color: var(--paper); letter-spacing: 0; text-transform: none; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 3px; background: var(--rule-2); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 13px; height: 13px; background: var(--gold); cursor: pointer; }
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border-radius: 0; border: 0; background: var(--gold); cursor: pointer; }
input[type="text"] {
  width: 100%; background: var(--ink); border: 1px solid var(--rule-2); color: var(--paper);
  padding: 10px 12px; font-family: "IBM Plex Mono", monospace; font-size: 12.5px;
}
input[type="text"]:focus { outline: none; border-color: var(--gold-d); }

.verdict { border: 1px solid var(--rule); background: var(--plate); padding: 24px; display: flex; flex-direction: column; }
.big { font-family: "IBM Plex Mono", monospace; font-size: clamp(34px, 5vw, 54px); color: var(--gold); line-height: 1; }
.big small { font-size: 15px; color: var(--dim); }
.verdict p { color: var(--dim); font-size: 15px; }
.floorline { margin-top: auto; border-top: 1px solid var(--rule); padding-top: 16px; font-size: 14.5px; color: var(--dim); }
.floorline b { color: var(--paper); }

.bag { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 6px; }
.chip { font-family: "IBM Plex Mono", monospace; font-size: 11px; padding: 4px 9px; border: 1px solid var(--rule-2); color: var(--dim); }
.chip.on { border-color: var(--gold-d); color: var(--gold); }

/* ── docs ────────────────────────────────────────────────────────────────── */

.doc-body { display: grid; grid-template-columns: 230px 1fr; gap: 40px; align-items: start; }
.doc-nav { position: sticky; top: 80px; display: flex; flex-direction: column; }
.doc-nav a { display: flex; gap: 10px; padding: 10px 12px; text-decoration: none; color: var(--dim); font-size: 13.5px; border-left: 1px solid var(--rule); }
.doc-nav a b { color: var(--dimmer); font-family: "IBM Plex Mono", monospace; font-size: 11px; }
.doc-nav a.on { color: var(--gold); border-left-color: var(--gold); background: var(--plate); }
.doc-text { max-width: 70ch; }
.doc-text h2 { margin: 6px 0 18px; }
.doc-text p, .doc-text li { color: var(--dim); }
.doc-text li { margin-bottom: 8px; }
.doc-text strong { color: var(--paper); font-weight: 500; }
.doc-text pre { background: var(--plate); border: 1px solid var(--rule); padding: 15px 17px; overflow-x: auto; font-size: 12.5px; color: var(--gold); font-family: "IBM Plex Mono", monospace; }
.doc-text code { color: var(--gold); font-size: 0.93em; }

/* ── onward ──────────────────────────────────────────────────────────────── */

.onward { display: flex; align-items: baseline; gap: 16px; margin-top: 60px; padding: 20px 22px; border: 1px solid var(--rule); background: var(--plate); text-decoration: none; color: var(--paper); }
.onward:hover { border-color: var(--gold-d); }
.onward .l { font-size: 19px; font-weight: 600; }
.onward .n { color: var(--dim); font-family: "IBM Plex Mono", monospace; font-size: 12px; }
.onward .a { margin-left: auto; color: var(--gold); }

footer { border-top: 1px solid var(--rule); margin-top: 20px; }
.foot { max-width: var(--shell); margin: 0 auto; padding: 24px; display: flex; gap: 20px; flex-wrap: wrap; font-family: "IBM Plex Mono", monospace; font-size: 11.5px; color: var(--dimmer); }
.foot a { margin-left: auto; color: var(--dim); text-decoration: none; }
.foot a:hover { color: var(--gold); }

@media (max-width: 1000px) {
  .split, .desk, .doc-body, .cols3 { grid-template-columns: 1fr; }
  .doc-nav { position: static; flex-flow: row wrap; }
}
@media (max-width: 620px) {
  .top-inner { flex-wrap: wrap; padding: 10px 16px; gap: 10px; }
  .tabs { order: 3; width: 100%; margin: 0 -16px; padding: 0 16px; }
  .page { padding: 0 16px 70px; }
  .plate-head { padding: 34px 0 24px; }
}