/* ============================================================
   Limboid — limboid.ai
   A technical monograph rendered on black. Serif throughout,
   dense small type, exposed hairline grid, no rounded corners
   anywhere. Chrome is glass laid over the page, never a bar.
   ============================================================ */

:root {
  color-scheme: dark;

  --black:   #050403;
  --black-2: #080706;
  --paper:   #ece7de;
  --dim:     rgba(236, 231, 222, 0.60);
  --dim-2:   rgba(236, 231, 222, 0.38);
  --dim-3:   rgba(236, 231, 222, 0.20);
  --amber:   #d5a269;
  --amber-2: rgba(213, 162, 105, 0.62);
  --rule:    rgba(236, 231, 222, 0.14);
  --rule-2:  rgba(236, 231, 222, 0.07);

  --serif: "Source Serif 4", Charter, "Bitstream Charter", Georgia, serif;
  --mono:  "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --fs:       15.5px;
  --fs-sm:    13.5px;
  --fs-xs:    12px;
  --fs-micro: 10px;

  --gut:  clamp(20px, 4vw, 60px);
  --max:  1280px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; border-radius: 0 !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--black);
  color: var(--paper);
  font-family: var(--serif);
  font-size: var(--fs);
  font-weight: 400;
  line-height: 1.62;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--amber); color: #120b05; }

a { color: inherit; }
img, svg, canvas { display: block; max-width: 100%; }

:focus-visible { outline: 1px solid var(--paper); outline-offset: 4px; }

.lb-skip {
  position: absolute; top: -80px; left: var(--gut); z-index: 100;
  padding: 9px 14px; background: var(--paper); color: var(--black);
  font-family: var(--mono); font-size: var(--fs-xs); text-decoration: none;
}
.lb-skip:focus { top: 12px; }

/* ── shared primitives ────────────────────────────────────── */

.mono, .lb-label, .lb-kicker, .lb-badge, .lb-fig-n, .lb-nav a,
.lb-chip, .lb-tag, .lb-th, .lb-phase-tag, .lb-q-n {
  font-family: var(--mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  line-height: 1.3;
}

.lb-dim { color: var(--dim); }
.lb-amber { color: var(--amber); }

em { font-style: italic; }
strong { font-weight: 600; }

/* hairline rules do the structural work everywhere */
.rule    { border-top: 1px solid var(--rule); }
.rule-in { border-top: 1px solid var(--rule-2); }

/* ── glass chrome — components floating, never a bar ──────── */

.lb-chrome {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px var(--gut);
  pointer-events: none;
}
.lb-chrome > * { pointer-events: auto; }

.lb-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  font-size: var(--fs-micro);
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--rule);
  background: rgba(8, 7, 6, 0.42);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  transition: border-color 200ms ease, background 200ms ease;
}
.lb-chip:hover { border-color: var(--dim-3); }

.lb-mark {
  width: 7px; height: 7px;
  border: 1px solid var(--amber);
  transform: rotate(45deg);
  flex: none;
}

.lb-nav {
  display: flex;
  gap: 0;
  border: 1px solid var(--rule);
  background: rgba(8, 7, 6, 0.42);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
}
.lb-nav a {
  padding: 9px 13px;
  font-size: var(--fs-micro);
  color: var(--dim);
  text-decoration: none;
  border-left: 1px solid var(--rule-2);
  transition: color 180ms ease, background 180ms ease;
}
.lb-nav a:first-child { border-left: none; }
.lb-nav a:hover { color: var(--paper); background: rgba(236,231,222,0.05); }
.lb-nav a.is-current { color: var(--amber); }

@media (max-width: 860px) { .lb-nav a.opt { display: none; } }
@media (max-width: 560px) { .lb-chip .txt { display: none; } }

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

.wrap { width: min(var(--max), 100%); margin: 0 auto; padding-inline: var(--gut); }
.wrap-t { width: min(940px, 100%); margin: 0 auto; padding-inline: var(--gut); }

section { position: relative; }

.sec {
  padding-block: clamp(56px, 8vh, 104px);
  border-top: 1px solid var(--rule);
}

/* section head: mono index + rule + serif title, all on one grid */
.sec-head {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 0 clamp(20px, 3vw, 44px);
  align-items: start;
  margin-bottom: clamp(32px, 4vw, 56px);
}
.sec-i {
  font-family: var(--mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  color: var(--amber-2);
  padding-top: 0.7em;
  white-space: nowrap;
}
.sec-h {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 50px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.022em;
}
.sec-sub {
  grid-column: 2;
  max-width: 62ch;
  margin: 14px 0 0;
  color: var(--dim);
  font-size: var(--fs-sm);
}

@media (max-width: 700px) {
  .sec-head { grid-template-columns: 1fr; gap: 10px; }
  .sec-i { padding-top: 0; }
  .sec-sub { grid-column: 1; }
}

/* ── hero ─────────────────────────────────────────────────── */

.hero {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: clamp(88px, 11vh, 118px) 0 clamp(18px, 2.4vw, 28px);
  overflow: hidden;
}
.hero-canvas {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%;
  opacity: 0; transition: opacity 1.6s var(--ease);
}
.hero-canvas.is-lit { opacity: 1; }
.hero-veil {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(96deg, rgba(5,4,3,.95) 0%, rgba(5,4,3,.76) 36%, rgba(5,4,3,.14) 68%, rgba(5,4,3,.5) 100%),
    linear-gradient(180deg, rgba(5,4,3,.7) 0%, transparent 22%, transparent 58%, rgba(5,4,3,.94) 100%);
}

.hero-in { margin: auto 0; width: min(880px, 100%); }

.hero-h {
  margin: 0;
  font-size: clamp(40px, 5.6vw, 80px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.hero-h .amp { color: var(--amber); }

.hero-lede {
  max-width: 66ch;
  margin: clamp(20px, 2.2vw, 30px) 0 0;
  color: var(--dim);
  font-size: clamp(15px, 1.1vw, 17px);
}

/* an abstract block, because that is what this page actually is */
.abstract {
  margin-top: clamp(26px, 3vw, 38px);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 44px);
}
.abstract p { margin: 0; font-size: var(--fs-sm); color: var(--dim); max-width: 74ch; }
.abstract .lb-label { color: var(--amber-2); font-size: var(--fs-micro); }
@media (max-width: 700px) { .abstract { grid-template-columns: 1fr; gap: 10px; } }

.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: clamp(22px, 2.6vw, 32px); }

.hero-foot {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); font-size: var(--fs-micro);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--dim-2);
  border-top: 1px solid var(--rule-2);
  padding-top: 14px;
}

/* ── buttons ──────────────────────────────────────────────── */

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 18px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--paper);
  font-family: var(--mono); font-size: var(--fs-micro);
  letter-spacing: 0.16em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  transition: background 200ms ease, border-color 200ms ease, color 200ms ease;
}
.btn:hover { border-color: var(--dim-3); background: rgba(236,231,222,0.05); }
.btn-p { background: var(--amber); border-color: var(--amber); color: #120b05; }
.btn-p:hover { background: #e2b27a; border-color: #e2b27a; color: #120b05; }
.btn[disabled] { opacity: .5; cursor: default; }

/* ── status badges ────────────────────────────────────────── */

.lb-badge {
  display: inline-block;
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--dim-2);
  white-space: nowrap;
}
.lb-badge::before { content: "▪ "; }
.b-proto    { color: var(--amber); }
.b-target   { color: rgba(236,231,222,.72); }
.b-research { color: var(--dim); }
.b-vision   { color: var(--dim-2); }

/* ── 01 claims — hanging numerals, running prose ──────────── */

.prose { max-width: 70ch; }
.prose p { margin: 0 0 1.05em; }
.prose p:first-child { font-size: 1.06em; }
.prose .lead { color: var(--paper); }
.prose p { color: var(--dim); }
.hl { color: var(--paper); box-shadow: inset 0 -1px 0 var(--amber-2); }

.claims { margin: clamp(34px, 4vw, 52px) 0 0; padding: 0; list-style: none; }
.claims li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 44px);
  padding: 20px 0;
  border-top: 1px solid var(--rule-2);
}
.claims li:last-child { border-bottom: 1px solid var(--rule-2); }
.claims .n {
  font-family: var(--mono); font-size: var(--fs-micro);
  letter-spacing: 0.16em; color: var(--amber-2); padding-top: 0.35em;
}
.claims h3 { margin: 0 0 6px; font-size: 17px; font-weight: 600; letter-spacing: -0.012em; }
.claims p  { margin: 0; color: var(--dim); font-size: var(--fs-sm); max-width: 68ch; }

/* ── 02 stack — a layer table, exposed ────────────────────── */

.layers { border-top: 1px solid var(--rule); }
.layer {
  display: grid;
  grid-template-columns: 92px minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 36px);
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-2);
  align-items: baseline;
}
.layer .lv { font-family: var(--mono); font-size: var(--fs-micro); letter-spacing: .16em; color: var(--amber-2); }
.layer h3 { margin: 0 0 4px; font-size: 19px; font-weight: 600; letter-spacing: -0.02em; }
.layer .role { font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim-2); }
.layer ul { margin: 0; padding: 0; list-style: none; columns: 2; column-gap: clamp(20px, 3vw, 44px); }
.layer li { color: var(--dim); font-size: var(--fs-sm); break-inside: avoid; padding: 1px 0; }
.layer li::before { content: "— "; color: var(--dim-3); }
@media (max-width: 860px) { .layer { grid-template-columns: 1fr; gap: 8px; } .layer ul { columns: 1; } }

/* ── tables (the workhorse) ───────────────────────────────── */

.tbl { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.tbl caption {
  text-align: left; padding-bottom: 12px;
  font-family: var(--mono); font-size: var(--fs-micro);
  letter-spacing: .16em; text-transform: uppercase; color: var(--amber-2);
}
.tbl th, .tbl td { text-align: left; vertical-align: top; padding: 11px 16px 11px 0; }
.tbl thead th {
  font-family: var(--mono); font-weight: 500; font-size: 9.5px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--dim-2);
  border-bottom: 1px solid var(--rule); padding-bottom: 9px;
}
.tbl tbody tr { border-bottom: 1px solid var(--rule-2); }
.tbl tbody tr:hover { background: rgba(236,231,222,0.022); }
.tbl td:first-child { color: var(--paper); font-weight: 600; width: 25%; }
.tbl td.num, .tbl td .val { font-family: var(--mono); font-size: var(--fs-xs); }
.tbl td p { margin: 0 0 6px; color: var(--dim); }
.tbl td p:last-child { margin: 0; }
.tbl-scroll { overflow-x: auto; }

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

figure { margin: 0; }
.fig {
  border: 1px solid var(--rule);
  padding: clamp(16px, 2.4vw, 26px);
  background: rgba(236,231,222,0.014);
}
.fig-cap {
  display: flex; gap: 10px; align-items: baseline;
  margin-top: 12px; padding-top: 10px;
  border-top: 1px solid var(--rule-2);
  font-size: var(--fs-xs); color: var(--dim-2);
}
.fig-n { color: var(--amber-2); font-size: 9.5px; white-space: nowrap; }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: clamp(16px, 2.4vw, 30px); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: clamp(16px, 2.4vw, 30px); }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* power-flow figure */
.flow { display: grid; gap: 0; }
.flow-step { padding: 12px 0; border-bottom: 1px solid var(--rule-2); }
.flow-step:last-child { border-bottom: none; }
.flow-step .t { font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--amber-2); }
.flow-step .m { display: block; margin-top: 3px; font-size: var(--fs-sm); }
.flow-step .s { display: block; font-size: var(--fs-xs); color: var(--dim-2); }

/* topology drawings */
.topo { width: 100%; height: auto; max-height: 250px; margin-inline: auto; }
.topo .lk { fill: none; stroke: rgba(236,231,222,.26); stroke-width: 1; stroke-linecap: round; }
.topo .nd { fill: var(--black); stroke: rgba(236,231,222,.5); stroke-width: 1; }
.topo .core { fill: rgba(213,162,105,.16); stroke: var(--amber); }
.topo .head { fill: rgba(213,162,105,.1);  stroke: var(--amber-2); }
.topo .hand { fill: rgba(213,162,105,.22); stroke: var(--amber); }
.topo text { font-family: var(--mono); font-size: 7px; letter-spacing: .14em; text-transform: uppercase; fill: var(--dim-2); }

/* ── datasheet (robots) ───────────────────────────────────── */

.sheet { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0; border-top: 1px solid var(--rule); }
.sheet > div { padding: 0 clamp(16px, 2.4vw, 30px); }
.sheet > div + div { border-left: 1px solid var(--rule-2); }
.sheet-h { padding-block: 18px; border-bottom: 1px solid var(--rule-2); }
.sheet-h h3 { margin: 0 0 4px; font-size: clamp(20px, 2.2vw, 27px); font-weight: 600; letter-spacing: -0.025em; }
.sheet-h .sub { font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim-2); }
.sheet-h .lb-badge { margin-top: 9px; display: inline-block; }
.sheet dl { margin: 0; }
.sheet dl > div { display: grid; grid-template-columns: 44% 1fr; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--rule-2); }
.sheet dt { font-size: var(--fs-xs); color: var(--dim-2); }
.sheet dd { margin: 0; font-family: var(--mono); font-size: var(--fs-xs); }
.sheet .note { padding: 16px 0 22px; font-size: var(--fs-sm); color: var(--dim); }
@media (max-width: 860px) {
  .sheet { grid-template-columns: 1fr; }
  .sheet > div + div { border-left: none; border-top: 1px solid var(--rule); }
}

/* ── prose sections with side notes ───────────────────────── */

.paper { display: grid; grid-template-columns: 92px minmax(0,1fr) minmax(0, 230px); gap: clamp(16px, 3vw, 44px); }
.paper .marg { font-size: var(--fs-xs); color: var(--dim-2); border-top: 1px solid var(--rule-2); padding-top: 10px; }
.paper .marg p { margin: 0 0 .8em; }
@media (max-width: 1000px) { .paper { grid-template-columns: 1fr; } .paper .marg { max-width: 60ch; } }

/* set maths, not a code block pretending to be one */
.eq {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 18px;
  margin: 16px 0;
  padding: 14px 0;
  border-top: 1px solid var(--rule-2);
  border-bottom: 1px solid var(--rule-2);
  overflow-x: auto;
}
.eq .eq-n {
  font-family: var(--mono); font-size: 9.5px;
  letter-spacing: .16em; color: var(--amber-2);
  white-space: nowrap;
}
math {
  font-family: var(--serif);
  font-size: 1.06em;
  color: var(--paper);
  math-style: normal;
}
math[display="block"] { display: block; min-width: 0; }
math .op { color: var(--amber-2); }
/* inline maths inside running text and table cells */
.tbl math, p math { font-size: 1em; }
.code {
  margin: 12px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--rule-2);
  background: rgba(0,0,0,.36);
  font-family: var(--mono); font-size: 11px; line-height: 1.72;
  color: var(--dim); white-space: pre; overflow-x: auto;
}
.loop {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px;
  padding: 12px 0; border-top: 1px solid var(--rule-2); border-bottom: 1px solid var(--rule-2);
  font-family: var(--mono); font-size: var(--fs-micro);
  letter-spacing: .14em; text-transform: uppercase; color: var(--dim);
}
.loop b { font-weight: 500; color: var(--amber); }
.loop i { width: 12px; height: 1px; background: var(--dim-3); flex: none; }

/* ── roadmap as a rail ────────────────────────────────────── */

.rail { border-top: 1px solid var(--rule); }
/* five children per row — phase, title, detail, bar, status */
.rail-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 180px) minmax(0, 1fr) 96px 68px;
  gap: clamp(10px, 1.6vw, 24px);
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule-2);
}
.rail-row .ph { font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; color: var(--dim-2); }
.rail-row.now .ph { color: var(--amber); }
.rail-row h3 { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: -0.012em; }
.rail-row p { margin: 0; font-size: var(--fs-xs); color: var(--dim-2); }
.bar { position: relative; height: 3px; background: var(--rule-2); }
.bar span { position: absolute; inset: 0 auto 0 0; background: var(--dim-3); }
.rail-row.now .bar span { background: var(--amber); }
.rail-row.next .bar span { background: var(--amber-2); }
.rail-st { font-family: var(--mono); font-size: 9px; letter-spacing: .16em; text-transform: uppercase; color: var(--dim-2); text-align: right; }
.rail-row.now .rail-st { color: var(--amber); }
@media (max-width: 900px) {
  .rail-row { grid-template-columns: 64px 1fr; }
  .rail-row .bar, .rail-row .rail-st { display: none; }
  .rail-row p { margin-top: 4px; }
}

/* ── open questions — a research agenda ───────────────────── */

.agenda { columns: 2; column-gap: clamp(24px, 4vw, 56px); }
.agenda > div {
  break-inside: avoid;
  display: grid; grid-template-columns: 34px 1fr; gap: 10px;
  padding: 11px 0; border-top: 1px solid var(--rule-2);
}
.agenda .q-n { font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em; color: var(--amber-2); padding-top: .35em; }
.agenda p { margin: 0; font-size: var(--fs-sm); color: var(--dim); }
@media (max-width: 800px) { .agenda { columns: 1; } }

/* ── metric list ──────────────────────────────────────────── */

.metrics { columns: 3; column-gap: clamp(20px, 3vw, 40px); margin: 12px 0 0; padding: 0; list-style: none; }
.metrics li { break-inside: avoid; font-family: var(--mono); font-size: 10.5px; color: var(--dim-2); padding: 2px 0; }
@media (max-width: 800px) { .metrics { columns: 2; } }
@media (max-width: 480px) { .metrics { columns: 1; } }

.callout { border-left: 2px solid var(--amber); padding: 2px 0 2px 18px; margin: clamp(24px,3vw,36px) 0 0; }
.callout p { margin: 0 0 .8em; color: var(--dim); font-size: var(--fs-sm); max-width: 72ch; }
.callout p:last-child { margin: 0; }
.callout strong { color: var(--paper); }

/* ── deeper-reading links ─────────────────────────────────── */

.more { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0; border-top: 1px solid var(--rule); }
.more a {
  display: block; padding: 20px clamp(14px,2vw,24px) 22px;
  text-decoration: none; border-bottom: 1px solid var(--rule-2);
  transition: background 200ms ease;
}
.more a + a { border-left: 1px solid var(--rule-2); }
.more a:hover { background: rgba(236,231,222,0.03); }
.more .k { font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--amber-2); }
.more h3 { margin: 8px 0 5px; font-size: 18px; font-weight: 600; letter-spacing: -0.015em; }
.more p { margin: 0; font-size: var(--fs-xs); color: var(--dim-2); }
.more .go { display: inline-block; margin-top: 10px; font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; color: var(--dim); }
@media (max-width: 800px) { .more { grid-template-columns: 1fr; } .more a + a { border-left: none; } }

/* ── signup — inline, no card ─────────────────────────────── */

.join { display: grid; grid-template-columns: 92px minmax(0,1fr); gap: clamp(16px,3vw,44px); }
.join-f { max-width: 560px; }
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field label { font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--dim-2); }
.inp {
  width: 100%; padding: 10px 0;
  background: transparent; border: none; border-bottom: 1px solid var(--rule);
  color: var(--paper); font-family: var(--serif); font-size: var(--fs);
  transition: border-color 200ms ease;
}
.inp::placeholder { color: var(--dim-3); }
.inp:focus { outline: none; border-bottom-color: var(--amber); }
.inp[aria-invalid="true"] { border-bottom-color: #c8603f; }
select.inp { appearance: none; cursor: pointer; padding-right: 24px; }
select.inp option { background: #0b0908; color: var(--paper); }
.selw { position: relative; }
.selw::after {
  content: ""; position: absolute; right: 4px; top: 50%;
  width: 5px; height: 5px; border-right: 1px solid var(--dim-2); border-bottom: 1px solid var(--dim-2);
  transform: translateY(-70%) rotate(45deg); pointer-events: none;
}
.hp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.fnote { margin: 10px 0 0; font-size: var(--fs-xs); color: var(--dim-2); }
.fstat { margin: 8px 0 0; font-family: var(--mono); font-size: 11px; color: var(--dim); }
.fstat.ok { color: var(--amber); }
.fstat.err { color: #e08a68; }
form.done .field, form.done .btn, form.done .fnote { display: none; }
form.done .fstat { font-family: var(--serif); font-size: var(--fs); line-height: 1.6; }
@media (max-width: 700px) { .join { grid-template-columns: 1fr; } }

/* ── footer — one line ────────────────────────────────────── */

.foot {
  border-top: 1px solid var(--rule);
  padding-block: 22px;
  display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: baseline;
  font-family: var(--mono); font-size: 9.5px;
  letter-spacing: .14em; text-transform: uppercase; color: var(--dim-2);
}
.foot a { color: var(--dim); text-decoration: none; }
.foot a:hover { color: var(--paper); }

/* ── subpage bits ─────────────────────────────────────────── */

.doc-head { padding-block: clamp(96px, 13vh, 150px) clamp(28px, 4vw, 48px); }
.doc-head .lb-kicker { font-size: var(--fs-micro); color: var(--amber-2); }
.doc-head h1 {
  margin: 12px 0 0;
  font-size: clamp(34px, 5vw, 62px); font-weight: 600;
  line-height: 1.02; letter-spacing: -0.03em;
}
.doc-head .stand { max-width: 66ch; margin: 16px 0 0; color: var(--dim); font-size: var(--fs); }

.doc h2 {
  margin: clamp(40px, 5vw, 64px) 0 14px;
  padding-top: 16px; border-top: 1px solid var(--rule);
  font-size: clamp(22px, 2.4vw, 30px); font-weight: 600; letter-spacing: -0.02em;
}
.doc h3 { margin: 26px 0 8px; font-size: 17px; font-weight: 600; letter-spacing: -0.012em; }
.doc p { margin: 0 0 1em; color: var(--dim); max-width: 72ch; }
.doc ul, .doc ol { margin: 0 0 1em; padding-left: 1.1em; color: var(--dim); max-width: 72ch; }
.doc li { margin: 3px 0; }
.doc .lb-badge { display: inline-block; margin-bottom: 10px; }
.doc .tbl { margin-bottom: 18px; }

.crumb { display: inline-flex; gap: 8px; font-family: var(--mono); font-size: 9.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--dim-2); text-decoration: none; }
.crumb:hover { color: var(--paper); }

/* ── reveal ───────────────────────────────────────────────── */

.rv { opacity: 0; transform: translateY(12px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.rv.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .hero-canvas { transition: none; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}

/* two-column comparison tables: neither side is the "key", so drop the
   first-column emphasis that the spec tables rely on */
.tbl-pair td { font-weight: 400 !important; color: var(--dim) !important; width: 50%; }

/* ── diagrams: line and label, nothing else ───────────────── */

.dia { width: 100%; height: auto; display: block; margin-inline: auto; }
.dia .bx  { fill: none; stroke: rgba(236,231,222,.30); stroke-width: 1; }
.dia .bx-a{ fill: none; stroke: var(--amber); stroke-width: 1; }
.dia .ln  { fill: none; stroke: rgba(236,231,222,.28); stroke-width: 1; }
.dia .ln-a{ fill: none; stroke: var(--amber-2); stroke-width: 1; }
.dia .ln-d{ stroke-dasharray: 3 3; }
.dia .ln-t{ stroke-dasharray: 1 3; }
.dia .nd  { fill: var(--black); stroke: rgba(236,231,222,.5); stroke-width: 1; }
.dia .nd-a{ fill: rgba(213,162,105,.18); stroke: var(--amber); stroke-width: 1; }
.dia text {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .08em;
  fill: rgba(236,231,222,.72);
}
.dia .t-k { fill: var(--paper); }
.dia .t-a { fill: var(--amber); }
.dia .t-s { font-size: 7px; fill: var(--dim-2); letter-spacing: .06em; }
.dia .t-e { font-size: 7px; fill: var(--dim-2); letter-spacing: .1em; }