/* Factory Zero — design system
   Ported from the Claude Design source `Factory Zero.dc.html`.
   Values are preserved exactly; inline styles are lifted into tokens + classes. */

:root {
  --bg:      #0A0A0B;
  --panel:   #0E0E10;
  --panel-2: #141416;
  --line:    #1C1C1F;
  --line-2:  #2A2A2E;
  --dim:     #4A4A4E;
  --muted:   #8A8A8E;
  --body:    #A9A8A5;
  --ink:     #EDEBE6;
  --accent:  #FF5A36;

  --sans: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --gut: 4vw;
}

/* ---------- base ---------- */

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
body {
  font-family: var(--sans);
  overflow-x: hidden;
}
* { box-sizing: border-box; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }

::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; }

canvas { display: block; }

/* Author `display` declarations outrank the UA's [hidden] rule, and several
   components below set display, so restate it with priority. */
[hidden] { display: none !important; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: var(--bg);
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
}
.skip-link:focus { left: 0; color: var(--bg); }

/* ---------- motion ---------- */

@keyframes fzPulse { 0%, 100% { opacity: 1 } 50% { opacity: .25 } }
@keyframes fzUp    { from { opacity: 0; transform: translateY(24px) } to { opacity: 1; transform: none } }
@keyframes fzIn    { from { opacity: 0 } to { opacity: 1 } }
@keyframes fzSpin  { to { transform: rotate(360deg) } }
/* Sweeps the full height of its container, whatever that height is. */
@keyframes fzScan  { from { background-position: 0 -120px } to { background-position: 0 100% } }

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ---------- shared type ---------- */

.mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 56px;
}
.eyebrow--flush { margin-bottom: 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 56px;
}
.section-head .hint { color: var(--muted); }

.h-xl {
  margin: 0;
  font-weight: 400;
  font-size: clamp(44px, 7vw, 120px);
  line-height: .96;
  letter-spacing: -.04em;
}
.h-lg {
  margin: 0;
  font-weight: 400;
  font-size: clamp(40px, 5.6vw, 92px);
  line-height: .98;
  letter-spacing: -.04em;
}
.lede {
  margin: 0;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.55;
  color: var(--body);
  font-weight: 300;
}

.section {
  padding: 16vh var(--gut);
  border-top: 1px solid var(--line);
}
.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: 64px 6vw;
  align-items: start;
}

/* ---------- header ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 22px var(--gut);
  mix-blend-mode: difference;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: .18em;
  font-size: 13px;
}
.wordmark .o {
  display: inline-block;
  width: 14px; height: 14px;
  border: 1.5px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  position: relative;
  top: -1px;
  animation: fzSpin 12s linear infinite;
}
.site-nav {
  display: flex;
  gap: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.site-nav .enter { color: var(--accent); }

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

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: 110px var(--gut) 40px;
  overflow: hidden;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.readout {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  animation: fzIn 1.6s .4s both;
}
.readout-group { display: flex; gap: 48px; }
.readout-group--end { text-align: right; }
.readout dt { margin: 0; }
.readout dd { margin: 6px 0 0; color: var(--ink); }
.readout .live {
  display: flex;
  align-items: center;
  gap: 8px;
}
.readout-group--end .live { justify-content: flex-end; }
.dot-live {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: fzPulse 2.2s infinite;
  display: inline-block;
  flex: none;
}
.hero-title-wrap {
  position: relative;
  display: flex;
  align-items: flex-end;
  padding-bottom: 6vh;
  pointer-events: none;
}
.hero-title {
  margin: 0;
  max-width: 13ch;
  font-weight: 400;
  font-size: clamp(48px, 7.6vw, 128px);
  line-height: .94;
  letter-spacing: -.04em;
  text-wrap: balance;
  animation: fzUp 1.4s .6s both;
}
.hero-foot {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  flex-wrap: wrap;
  animation: fzIn 1.6s 1.4s both;
}
.hero-foot .lede { color: var(--body); }
.hero-phase {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  text-align: right;
}
.hero-phase b { display: block; font-weight: 400; color: var(--accent); margin-top: 6px; }

/* ---------- 01 thesis ---------- */

.thesis { padding: 22vh var(--gut); border-top: 1px solid var(--line); }
.thesis h2 { margin-bottom: 12vh; max-width: 14ch; }
.thesis-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 48px 6vw;
  max-width: 1200px;
}
.couplet {
  display: grid;
  gap: 10px;
  font-size: clamp(22px, 2.2vw, 32px);
  line-height: 1.2;
  letter-spacing: -.02em;
  font-weight: 400;
}
.couplet .was { color: var(--muted); }
.thesis-grid .lede { max-width: 40ch; }
.thesis-grid .lede strong { color: var(--ink); font-weight: 300; }

/* ---------- 02 the factory ---------- */

.factory h2 { margin-bottom: 10vh; max-width: 16ch; }
.os-badge-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.os-badge {
  border: 1px solid var(--ink);
  padding: 22px 40px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .2em;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: center;
}
.os-badge .ring {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  display: inline-block;
  animation: fzPulse 3s infinite;
  flex: none;
}
.os-stem {
  width: 1px; height: 48px;
  background: linear-gradient(var(--ink), var(--line-2));
}
.layers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.layer {
  background: var(--bg);
  padding: 24px 20px 28px;
  display: grid;
  gap: 10px;
  align-content: start;
}
.layer-name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.agent {
  all: unset;
  cursor: crosshair;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line-2);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  background: transparent;
  transition: border-color .3s, color .3s, background-color .3s;
}
.agent .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--line-2);
  transition: background-color .3s;
  flex: none;
}
.agent:hover { border-color: var(--accent); color: var(--ink); }
.agent:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }
.agent.is-active {
  border-color: var(--accent);
  color: var(--ink);
  background: var(--panel-2);
}
.agent.is-active .dot { background: var(--accent); }

.agent-readout {
  margin-top: 1px;
  border: 1px solid var(--line);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 32px;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--panel);
}
.agent-readout .id   { color: var(--accent); }
.agent-readout .msg  { color: var(--ink); }
.agent-readout .time { color: var(--muted); }

/* ---------- 03 one system ---------- */

.branch h2 { margin-bottom: 40px; }
.branch-map {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
}
.shared {
  border: 1px solid var(--line-2);
  padding: 20px;
  display: grid;
  gap: 9px;
  align-content: start;
  color: var(--muted);
}
.shared .title { color: var(--ink); margin-bottom: 8px; }
.branch-join { position: relative; }
.branch-join::before {
  content: '';
  position: absolute;
  left: 50%; top: 20px; bottom: 20px;
  width: 1px;
  background: var(--line-2);
}
.branch-join::after {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px;
  background: var(--line-2);
}
.branch-list {
  display: grid;
  gap: 1px;
  align-content: start;
  background: var(--line-2);
  border: 1px solid var(--line-2);
}
.branch-list > div {
  background: var(--bg);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.branch-list .id { color: var(--ink); }
.branch-list .own { color: var(--muted); }
.branch-list .next { color: var(--muted); }

/* ---------- 04 pipeline ---------- */

.pipeline h2 { margin-bottom: 10vh; }
.line {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(150px, 100%), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.line-scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(transparent, rgba(255, 90, 54, .06), transparent);
  background-size: 100% 120px;
  background-repeat: no-repeat;
  animation: fzScan 7s linear infinite;
}
.stage {
  background: var(--bg);
  min-height: 280px;
  padding: 20px 16px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 20px;
}
.stage-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
}
.stage-head .idx { color: var(--muted); }
.stage-body { display: grid; gap: 8px; align-content: start; }
.unit {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  background: var(--panel);
  animation: fzIn .8s both;
  transition: border-color .3s;
}
.unit:hover { border-color: var(--accent); color: inherit; }

/* ---------- 05 autonomy ---------- */

.autonomy h2 { margin-bottom: 40px; }
.levels {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.level {
  background: var(--bg);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}
.level .name {
  font-family: var(--sans);
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--muted);
  overflow-wrap: anywhere;
}
.level.is-target {
  background: var(--panel);
  color: var(--accent);
}
.level.is-target .name { color: var(--ink); }
.bars { display: flex; gap: 4px; }
.bars i {
  width: 18px; height: 3px;
  background: var(--line-2);
  display: block;
}
.level .bars i.on { background: var(--muted); }
.level.is-target .bars i.on { background: var(--accent); }

/* ---------- 06 human role ---------- */

.roles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 1100px;
}
.role {
  background: var(--bg);
  padding: 32px 28px;
  display: grid;
  gap: 18px;
  align-content: start;
}
.role--agent { background: var(--panel); }
.role .label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink);
}
.role--agent .label { color: var(--accent); }
.role ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: clamp(22px, 2vw, 30px);
  letter-spacing: -.02em;
}
.role p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
  font-weight: 300;
}
.human-role h2 { margin-bottom: 10vh; }
.human-role h2 .machine { color: var(--muted); }

/* ---------- 07 continuous creation ---------- */

.cycle { padding: 16vh var(--gut) 20vh; border-top: 1px solid var(--line); }
.cycle h2 { margin-bottom: 40px; }
.cycle .lede { max-width: 40ch; }
.cadence {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}
.cadence .last { color: var(--ink); }
.log {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 24px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.9;
  min-height: 360px;
  display: grid;
  align-content: end;
}
.log-head {
  color: var(--muted);
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.log-head .rec { color: var(--accent); animation: fzPulse 1.4s infinite; }
.log-line {
  display: flex;
  gap: 20px;
  color: var(--ink);
  animation: fzIn .5s both;
}
.log-line .t { color: var(--muted); flex: none; }
.log-line.is-key { color: var(--accent); }

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

.site-footer {
  border-top: 1px solid var(--line);
  padding: 12vh var(--gut) 40px;
  display: grid;
  gap: 64px;
}
.enter-cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-weight: 400;
  font-size: clamp(36px, 6vw, 104px);
  line-height: 1;
  letter-spacing: -.04em;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 32px;
}
.enter-cta .arrow {
  font-family: var(--mono);
  font-size: clamp(20px, 3vw, 48px);
}
.footer-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}
.footer-meta nav { display: flex; gap: 28px; flex-wrap: wrap; }

/* ---------- 404 ---------- */

.notfound {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-content: center;
  gap: 32px;
  padding: 110px var(--gut) 40px;
}
.notfound .code {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}

/* Grid/flex items default to min-width:auto, so a single long token can push
   the page wider than the viewport. Opt every text-bearing track out. */
.two-col > *,
.thesis-grid > *,
.layers > *,
.line > *,
.stage > *,
.levels > *,
.level > *,
.roles > *,
.branch-map > *,
.branch-list > *,
.readout-group > *,
.agent-readout > * { min-width: 0; }

.agent > span:first-child,
.branch-list .own,
.unit > span { overflow-wrap: anywhere; }

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

@media (max-width: 900px) {
  .readout { flex-direction: column; gap: 28px; }
  .readout-group { gap: 32px; }
  .readout-group--end { text-align: left; }
  .readout-group--end .live { justify-content: flex-start; }
  .hero-phase { text-align: left; }
  .agent-readout { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 760px) {
  .site-header { padding: 16px var(--gut); }
  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 10px;
    letter-spacing: .1em;
  }
  .hero { padding-top: 130px; }
  .branch-map { grid-template-columns: 1fr; gap: 24px; }
  .branch-join { display: none; }
  .level { grid-template-columns: 74px 1fr; gap: 8px 14px; }
  .level .bars { grid-column: 1 / -1; }
  .os-badge { padding: 18px 22px; font-size: 12px; letter-spacing: .14em; }
  .thesis h2 { margin-bottom: 8vh; }
  .factory h2, .pipeline h2, .human-role h2 { margin-bottom: 7vh; }
}

/* hero readout uses <dl> for semantics */
.readout dl { margin: 0; }

/* ================================================================
   SUB-PAGES
   ================================================================ */

/* ---------- shared sub-page chrome ---------- */

.site-nav a[aria-current="page"] { color: var(--accent); }

.page {
  padding: 140px var(--gut) 8vh;
}
.page-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.page-head .kicker { color: var(--accent); }
.page-head .count { color: var(--muted); }

.h-page {
  margin: 0 0 8vh;
  font-weight: 400;
  font-size: clamp(48px, 8vw, 140px);
  line-height: .92;
  letter-spacing: -.04em;
}

.site-subfooter {
  border-top: 1px solid var(--line);
  padding: 40px var(--gut);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}
.site-subfooter nav { display: flex; gap: 28px; flex-wrap: wrap; }

/* ---------- ventures: registry ---------- */

.registry {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
}
.registry-cols {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) 120px 110px 70px;
  gap: 16px;
  align-items: center;
}
.registry-head {
  padding: 12px 20px;
  background: var(--bg);
  color: var(--muted);
}
.registry-head .aut { text-align: right; }

/* Not `all: unset` here: that would also wipe the grid this element gets from
   .registry-cols, which is declared earlier. Reset the button explicitly. */
.record {
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  border: 0;
  border-left: 2px solid transparent;
  font: inherit;
  letter-spacing: inherit;
  text-align: left;
  cursor: pointer;
  padding: 20px;
  background: var(--bg);
  color: var(--ink);
  transition: background-color .3s, border-color .3s;
  animation: fzUp .6s both;
}
.record:hover { background: var(--panel-2); }
.record:focus-visible { outline: 1px solid var(--accent); outline-offset: -3px; }
.record[aria-pressed="true"] {
  background: var(--panel-2);
  border-left-color: var(--accent);
}
.record .name {
  font-family: var(--sans);
  font-size: 18px;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.record .status { display: flex; align-items: center; gap: 8px; }
.record .status .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
  flex: none;
}
.record .status.is-live .dot { animation: fzPulse 2s infinite; }
.record .cat { color: var(--muted); }
.record .aut { text-align: right; }

/* the one venture with real brand art */
/* the mark is 360x264 after cropping, so drive it from width only */
.venture-logo {
  width: 30px;
  height: auto;
  flex: none;
  display: block;
}
.venture-logo--lg { width: 120px; }

/* ---------- ventures: detail ---------- */

.record-detail {
  padding: 8vh var(--gut) 16vh;
  border-top: 1px solid var(--line);
}
.record-detail .eyebrow { color: var(--muted); }
.detail-id {
  font-family: var(--mono);
  font-size: clamp(40px, 6vw, 96px);
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  animation: fzIn .6s both;
}
.detail-name {
  margin: 0 0 24px;
  font-weight: 400;
  font-size: clamp(32px, 4vw, 64px);
  line-height: 1;
  letter-spacing: -.03em;
}
.detail-desc {
  margin: 0 0 32px;
  max-width: 48ch;
  font-size: 17px;
  line-height: 1.55;
  color: var(--body);
  font-weight: 300;
}
.detail-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}
.detail-link[aria-disabled="true"] { color: var(--muted); cursor: default; }

.spec {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.spec > div {
  background: var(--bg);
  padding: 24px;
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}
.spec dt { color: var(--muted); margin: 0; }
.spec dd { margin: 0; font-size: 22px; overflow-wrap: anywhere; }
.spec .wide { grid-column: 1 / -1; }
.spec .inherit { background: var(--panel); color: var(--muted); gap: 10px; }
.spec .inherit dd { font-size: 11px; color: var(--ink); line-height: 1.9; }
.meter {
  height: 2px;
  background: var(--line-2);
  position: relative;
  display: block;
}
.meter i {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  background: var(--accent);
  transform-origin: left;
  animation: fzGrow 1.2s cubic-bezier(.2, .8, .2, 1) both;
}
@keyframes fzGrow { from { transform: scaleX(0) } to { transform: scaleX(1) } }

/* ---------- system: architecture stack ---------- */

.stack {
  display: grid;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
}
.tier {
  border: 1px solid var(--line-2);
  padding: 28px;
  display: grid;
  gap: 24px;
}
.tier--core { background: var(--panel); }
.tier-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.tier-head .n { color: var(--accent); }
.tier-head .mode { color: var(--muted); }
.modules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(130px, 100%), 1fr));
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line-2);
}
.modules > * {
  background: var(--bg);
  padding: 20px 16px;
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
  animation: fzUp .6s both;
}
.modules .label {
  font-family: var(--sans);
  font-size: 17px;
  letter-spacing: -.01em;
  overflow-wrap: anywhere;
}
.modules .beacon {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: block;
  animation: fzPulse 2s infinite;
}
.modules .id { color: var(--muted); }
.modules a:hover { background: var(--panel-2); color: inherit; }
.rung {
  height: 64px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}
.rung span:nth-child(even) { border-left: 1px dashed #3A3A3E; }

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 48px 5vw;
}
.principle { display: grid; gap: 14px; min-width: 0; }
.principle .n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}
.principle .claim { font-size: 26px; letter-spacing: -.02em; }
.principle p {
  margin: 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.5;
  font-weight: 300;
}

/* ---------- thesis: paper ---------- */

.paper {
  padding: 140px var(--gut) 16vh;
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 720px);
  gap: 48px 8vw;
  justify-content: start;
}
.paper-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  display: grid;
  gap: 12px;
  align-content: start;
  position: sticky;
  top: 120px;
  height: max-content;
}
.paper-meta .rev { color: var(--accent); }
.paper-toc { margin-top: 24px; display: grid; gap: 8px; }
.paper-toc a { color: var(--muted); }
.paper-toc a:hover { color: var(--accent); }
.paper-body { display: grid; gap: 56px; animation: fzUp .8s both; }
.paper-body > h1 {
  margin: 0;
  font-weight: 400;
  font-size: clamp(40px, 5.2vw, 84px);
  line-height: .98;
  letter-spacing: -.04em;
  text-wrap: balance;
}
.clause { display: grid; gap: 18px; scroll-margin-top: 120px; }
.clause .n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}
.clause h2 {
  margin: 0;
  font-weight: 400;
  font-size: 30px;
  letter-spacing: -.02em;
}
.clause p {
  margin: 0;
  font-size: 18px;
  line-height: 1.6;
  color: #C9C8C4;
  font-weight: 300;
}
.paper-end {
  border-top: 1px solid var(--line-2);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}
.paper-end a { color: var(--accent); }

/* ---------- about ---------- */

.about {
  min-height: 100vh;
  min-height: 100svh;
  padding: 140px var(--gut) 16vh;
  display: grid;
  align-content: center;
  gap: 10vh;
}
.about-lead { display: grid; gap: 40px; animation: fzUp .8s both; }
.about-lead h1 {
  margin: 0;
  font-weight: 400;
  font-size: clamp(36px, 5vw, 80px);
  line-height: 1.02;
  letter-spacing: -.04em;
  max-width: 22ch;
  text-wrap: balance;
}
.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 1100px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.facts > div {
  background: var(--bg);
  padding: 28px;
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}
.facts dt { color: var(--muted); margin: 0; }
.facts dd {
  margin: 0;
  font-family: var(--sans);
  font-size: 22px;
  letter-spacing: -.01em;
}

/* ---------- enter: access request ---------- */
/* NB: .enter is taken by the nav's ENTER link, so the page class is .enter-page */

.enter-page {
  min-height: 100vh;
  min-height: 100svh;
  padding: 140px var(--gut) 16vh;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: 64px 8vw;
  align-content: center;
}
.enter-lead { display: grid; gap: 40px; align-content: start; animation: fzUp .8s both; }
.enter-lead h1 {
  margin: 0;
  font-weight: 400;
  font-size: clamp(48px, 7vw, 120px);
  line-height: .94;
  letter-spacing: -.04em;
}
.enter-kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
}
.enter-form {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  align-content: start;
}
.channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(96px, 100%), 1fr));
  gap: 1px;
  background: var(--line);
}
.channel {
  all: unset;
  box-sizing: border-box;
  width: 100%;
  cursor: pointer;
  padding: 22px 16px;
  background: var(--bg);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-align: center;
  transition: background-color .3s, color .3s;
}
.channel:hover { color: var(--ink); }
.channel:focus-visible { outline: 1px solid var(--accent); outline-offset: -3px; }
.channel[aria-checked="true"] { background: var(--panel-2); color: var(--accent); }

.field {
  background: var(--bg);
  padding: 20px;
  display: grid;
  gap: 10px;
  color: var(--muted);
}
.field input,
.field textarea {
  all: unset;
  font-family: var(--sans);
  font-size: 20px;
  letter-spacing: -.01em;
  color: var(--ink);
  border-bottom: 1px solid var(--line-2);
  padding: 6px 0;
  transition: border-color .3s;
}
.field textarea {
  resize: vertical;
  min-height: 100px;
  white-space: pre-wrap;
}
.field input:focus,
.field textarea:focus { border-bottom-color: var(--accent); }
.field input::placeholder,
.field textarea::placeholder { color: var(--dim); }

.transmit {
  all: unset;
  box-sizing: border-box;
  width: 100%;
  cursor: pointer;
  padding: 24px 20px;
  background: var(--panel);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  transition: background-color .3s;
}
.transmit:hover { background: var(--panel-2); }
.transmit:focus-visible { outline: 1px solid var(--accent); outline-offset: -3px; }

.receipt {
  background: var(--bg);
  padding: 40px 24px;
  display: grid;
  gap: 20px;
  animation: fzUp .6s both;
}
.receipt .ok { color: var(--accent); }
.receipt .big {
  font-family: var(--sans);
  font-size: 28px;
  letter-spacing: -.02em;
}
.receipt .muted { color: var(--muted); }
.receipt a { color: var(--accent); }
.direct {
  background: var(--panel);
  padding: 20px;
  color: var(--muted);
  display: grid;
  gap: 8px;
}
.direct a { color: var(--ink); }
.direct a:hover { color: var(--accent); }

/* ---------- sub-page responsive ---------- */

@media (max-width: 900px) {
  .paper { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .paper-meta { position: static; }
  .paper-toc { grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; gap: 16px; }
  .spec { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .page, .paper, .about, .enter-page { padding-top: 150px; }
  .registry-cols {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 6px 12px;
  }
  .registry-head { display: none; }
  .record .status { grid-column: 1 / -1; }
  .record .cat { grid-column: 1 / -1; }
  .record .aut { grid-column: 1 / -1; text-align: left; }
  .tier { padding: 20px; }
  .rung { height: 40px; }
  .detail-id { gap: 14px; }
}

/* description lists used for spec/fact grids */
.spec, .facts { margin: 0; }
.spec dd { display: grid; gap: 14px; }

/* ---------- enter: form plumbing ---------- */

/* honeypot: off-screen for people, present for bots. Not display:none, which
   many bots skip. */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.verify { padding: 20px; }
.form-error {
  margin: 0;
  background: var(--bg);
  padding: 16px 20px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 1.6;
}
.form-error a { color: var(--ink); text-decoration: underline; }
.transmit[aria-busy="true"] { color: var(--muted); cursor: progress; }