:root {
  --ink: #171815;
  --ink-soft: #252620;
  --paper: #ece9df;
  --paper-bright: #f8f4e8;
  --line: rgba(23, 24, 21, 0.18);
  --line-dark: rgba(236, 233, 223, 0.18);
  --signal: #ff5a1f;
  --signal-soft: #ffbf3f;
  --safe: #8ccf8a;
  --danger: #e64b3c;
  --display: "FZKai-Z03", "KaiTi", "STKaiti", "Noto Serif SC", serif;
  --body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --mono: "Cascadia Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23,24,21,.035) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(rgba(23,24,21,.025) 1px, transparent 1px) 0 0 / 44px 44px,
    var(--paper);
  font-family: var(--body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
.mobile-only { display: none; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.privacy-strip {
  min-height: 34px;
  padding: 7px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--paper-bright);
  background: var(--signal);
  font: 700 11px/1.4 var(--mono);
  letter-spacing: .08em;
}
.privacy-strip strong { font-weight: 700; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 76px;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: rgba(236, 233, 223, .9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.wordmark { display: inline-flex; align-items: center; gap: 12px; width: fit-content; text-decoration: none; font-weight: 800; }
.wordmark-mark { width: 34px; height: 34px; display: grid; place-items: center; color: var(--paper-bright); background: var(--ink); font: 400 20px var(--display); transform: rotate(-3deg); }
nav { display: flex; gap: 30px; }
nav a { position: relative; text-decoration: none; font-size: 14px; font-weight: 700; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--signal); transition: right .25s ease; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }
.status-pill { justify-self: end; display: flex; align-items: center; gap: 8px; font: 700 10px var(--mono); letter-spacing: .08em; }
.status-pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--safe); box-shadow: 0 0 0 5px rgba(140,207,138,.2); animation: pulse 2s infinite; }

.hero { min-height: 720px; padding: 110px 0 100px; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 70px; }
.hero-copy, .hero-instrument { min-width: 0; }
.eyebrow { margin: 0 0 20px; color: var(--signal); font: 800 11px/1.4 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 720px; font: 500 clamp(48px, 6.4vw, 88px)/1.08 var(--display); letter-spacing: -.045em; }
.hero h1 em { color: var(--signal); font-style: normal; }
.hero-lede { max-width: 630px; margin: 30px 0 0; font-size: 18px; line-height: 1.9; }
.hero-actions { margin-top: 38px; display: flex; align-items: center; gap: 26px; }
.primary-button { display: inline-flex; align-items: center; gap: 18px; padding: 14px 18px 14px 22px; color: var(--paper-bright); background: var(--ink); text-decoration: none; font-weight: 800; box-shadow: 7px 7px 0 var(--signal); transition: transform .2s, box-shadow .2s; }
.primary-button span { font-family: var(--mono); }
.primary-button:hover { transform: translate(3px,3px); box-shadow: 4px 4px 0 var(--signal); }
.text-button { text-underline-offset: 5px; text-decoration-thickness: 1px; font-weight: 700; }
.hero-metrics { margin: 62px 0 0; padding-top: 24px; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); }
.hero-metrics div { padding-right: 16px; }
.hero-metrics dt { font: 800 18px var(--mono); }
.hero-metrics dd { margin: 5px 0 0; color: rgba(23,24,21,.64); font-size: 13px; }

.hero-instrument { position: relative; padding: 18px; color: var(--paper); background: var(--ink); border: 1px solid #000; box-shadow: 18px 18px 0 rgba(23,24,21,.11); transform: rotate(1deg); }
.instrument-topline { padding-bottom: 14px; display: flex; justify-content: space-between; gap: 15px; font: 700 10px var(--mono); letter-spacing: .09em; }
.demo-label { color: var(--signal-soft); }
.wave-window { padding: 28px 22px 16px; background: #0d0e0c; border: 1px solid var(--line-dark); }
.timecode { font: 700 clamp(38px,5vw,64px)/1 var(--mono); letter-spacing: -.07em; }
.timecode span { color: var(--signal); font-size: .46em; }
.waveform { height: 118px; margin-top: 22px; display: flex; align-items: center; gap: 5px; overflow: hidden; }
.waveform i { flex: 1 0 4px; max-width: 8px; border-radius: 1px; background: linear-gradient(to top,var(--signal),var(--signal-soft)); opacity: .88; transform-origin: center; animation: breathe 2.4s ease-in-out infinite alternate; }
.waveform .bar-1 { height: 18%; animation-delay: -.2s; }.waveform .bar-2 { height: 46%; animation-delay: -.8s; }.waveform .bar-3 { height: 76%; animation-delay: -1.2s; }.waveform .bar-4 { height: 34%; animation-delay: -.5s; }.waveform .bar-5 { height: 92%; animation-delay: -1.7s; }.waveform .bar-6 { height: 58%; animation-delay: -.9s; }.waveform .bar-7 { height: 28%; animation-delay: -1.4s; }.waveform .bar-8 { height: 68%; animation-delay: -.3s; }
.wave-scale { display: flex; justify-content: space-between; color: rgba(236,233,223,.45); font: 10px var(--mono); }
.instrument-grid { display: grid; grid-template-columns: 1fr 1fr; border-left: 1px solid var(--line-dark); border-top: 1px solid var(--line-dark); }
.instrument-grid div { padding: 17px; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.instrument-grid small { display: block; margin-bottom: 5px; color: rgba(236,233,223,.45); font: 9px var(--mono); letter-spacing: .12em; }
.instrument-grid strong { font-size: 14px; }
.instrument-grid .signal { color: var(--safe); }
.seal { position: absolute; right: -28px; bottom: -28px; width: 90px; height: 90px; display: grid; place-items: center; text-align: center; color: var(--paper-bright); background: var(--signal); border-radius: 50%; border: 2px solid var(--paper-bright); outline: 2px solid var(--signal); font: 700 12px/1.25 var(--mono); transform: rotate(-11deg); }

.manifesto { padding: 110px 0 130px; text-align: center; }
.manifesto p { margin: 0 0 10px; color: rgba(23,24,21,.55); font-size: 18px; }
.manifesto h2 { margin: 0; font: 500 clamp(36px,5vw,70px)/1.25 var(--display); }

.demo-section { padding: 100px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1fr 420px; align-items: end; gap: 40px; margin-bottom: 42px; }
.section-heading h2, .output-copy h2, .rules-panel h2, .boundary-heading h2 { margin: 0; font: 500 clamp(34px,4vw,58px)/1.2 var(--display); }
.section-heading > p { margin: 0; color: rgba(23,24,21,.65); }
.section-heading.compact { grid-template-columns: 1fr; }
.scenario-switcher { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--ink); }
.scenario-button { padding: 18px; display: flex; align-items: center; gap: 12px; color: var(--ink); background: transparent; border: 0; border-right: 1px solid var(--ink); cursor: pointer; font: 800 15px var(--body); text-align: left; transition: color .2s, background .2s; }
.scenario-button:last-child { border-right: 0; }
.scenario-button span { font: 700 10px var(--mono); opacity: .55; }
.scenario-button:hover, .scenario-button.active { color: var(--paper-bright); background: var(--ink); }

.demo-console { min-height: 530px; display: grid; grid-template-columns: 260px 1fr; color: var(--paper); background: var(--ink); }
.stage-rail { padding: 30px 20px; border-right: 1px solid var(--line-dark); }
.stage { position: relative; min-height: 66px; display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: start; color: rgba(236,233,223,.34); }
.stage:not(:last-child)::after { content: ""; position: absolute; left: 13px; top: 28px; bottom: 1px; width: 1px; background: var(--line-dark); }
.stage b { position: relative; z-index: 1; width: 27px; height: 27px; display: grid; place-items: center; background: var(--ink); border: 1px solid currentColor; border-radius: 50%; font: 700 9px var(--mono); }
.stage span { padding-top: 2px; font-size: 14px; font-weight: 700; }
.stage.active { color: var(--signal-soft); }.stage.done { color: var(--safe); }.stage.done b { color: var(--ink); background: var(--safe); border-color: var(--safe); }
.console-main { min-width: 0; padding: 30px; display: grid; grid-template-rows: auto 1fr auto; }
.console-toolbar { padding-bottom: 18px; display: flex; align-items: center; justify-content: space-between; gap: 15px; border-bottom: 1px solid var(--line-dark); font: 700 11px var(--mono); letter-spacing: .08em; }
.console-toolbar span { display: flex; align-items: center; gap: 9px; }.console-toolbar span i { width: 7px; height: 7px; border-radius: 50%; background: var(--safe); }
.run-button { padding: 10px 14px; color: var(--ink); background: var(--signal-soft); border: 0; cursor: pointer; font: 800 12px var(--body); }
.run-button:disabled { cursor: wait; opacity: .55; }
.run-button b { margin-left: 8px; font-family: var(--mono); }
.console-log { padding: 26px 0; height: 310px; overflow: auto; font: 13px/1.8 var(--mono); scrollbar-color: var(--signal) #20211d; }
.console-log p { margin: 0 0 8px; }.console-log .muted { color: rgba(236,233,223,.38); }.console-log .ok { color: var(--safe); }.console-log .warn { color: var(--signal-soft); }.console-log .error { color: #ff8175; }.console-log .info { color: var(--paper); }
.result-card { padding: 18px 20px; display: grid; grid-template-columns: 220px 1fr; align-items: center; gap: 20px; border: 1px solid var(--line-dark); }
.result-card small { display: block; margin-bottom: 4px; color: rgba(236,233,223,.4); font: 9px var(--mono); letter-spacing: .12em; }
.result-card strong { font-size: 19px; }.result-card p { margin: 0; color: rgba(236,233,223,.65); font-size: 14px; }
.result-card.success { border-color: var(--safe); }.result-card.success strong { color: var(--safe); }
.result-card.hold { border-color: var(--signal-soft); }.result-card.hold strong { color: var(--signal-soft); }
.result-card.failure { border-color: #ff8175; }.result-card.failure strong { color: #ff8175; }

.output-section { padding: 130px 0; display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: center; }
.output-copy h2 { font-size: clamp(36px,4vw,56px); }
.file-list { margin: 42px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.file-list li { padding: 15px 0; display: grid; grid-template-columns: 54px 1fr; align-items: center; gap: 16px; border-bottom: 1px solid var(--line); }
.file-list > li > span { font: 800 10px var(--mono); color: var(--signal); }
.file-list strong, .file-list small { display: block; }.file-list small { color: rgba(23,24,21,.55); }
.transcript-sheet { position: relative; padding: 48px 46px 62px; background: var(--paper-bright); border: 1px solid rgba(23,24,21,.28); box-shadow: 16px 16px 0 rgba(23,24,21,.09); transform: rotate(-1deg); overflow: hidden; }
.transcript-sheet::before { content: ""; position: absolute; top: 0; bottom: 0; left: 25px; width: 1px; background: rgba(230,75,60,.28); }
.sheet-header { padding-bottom: 12px; display: flex; justify-content: space-between; border-bottom: 2px solid var(--ink); font: 700 9px var(--mono); letter-spacing: .08em; }
.transcript-sheet h3 { margin: 30px 0 0; font: 500 38px var(--display); }.sheet-meta { margin: 4px 0 28px; color: rgba(23,24,21,.5); font: 11px var(--mono); }
.transcript-line { padding: 16px 0; border-top: 1px dashed var(--line); }.transcript-line time { color: var(--signal); font: 10px var(--mono); }.transcript-line p { margin: 6px 0 0; }.transcript-line b { font-weight: 800; }
.sheet-stamp { position: absolute; right: 30px; bottom: 22px; padding: 8px 12px; color: var(--danger); border: 2px solid var(--danger); font: 800 11px/1.25 var(--mono); text-align: center; transform: rotate(-6deg); opacity: .78; }

.capabilities { padding: 110px 0 130px; border-top: 1px solid var(--line); }
.capability-grid { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.capability-grid article { min-height: 245px; padding: 30px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); transition: color .25s, background .25s, transform .25s; }
.capability-grid article:hover { color: var(--paper-bright); background: var(--ink); transform: translate(-4px,-4px); box-shadow: 4px 4px 0 var(--signal); }
.capability-grid article > span { color: var(--signal); font: 800 10px var(--mono); }.capability-grid h3 { margin: 56px 0 10px; font: 500 26px var(--display); }.capability-grid p { margin: 0; color: rgba(23,24,21,.62); }.capability-grid article:hover p { color: rgba(248,244,232,.68); }

.rules-section { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }
.rules-panel { padding: 90px max(36px,calc((100vw - 1180px)/2)); }
.quality-panel { padding-right: 70px; color: var(--paper); background: var(--ink); }
.checklist-panel { padding-left: 70px; color: var(--ink); background: var(--signal-soft); }
.rules-panel ol, .rules-panel ul { margin: 42px 0 0; padding: 0; list-style: none; }
.quality-panel li { padding: 16px 0; display: grid; grid-template-columns: 86px 1fr; gap: 16px; border-top: 1px solid var(--line-dark); }.quality-panel li:last-child { border-bottom: 1px solid var(--line-dark); }.quality-panel b { color: var(--signal-soft); }.quality-panel span { color: rgba(236,233,223,.7); }
.checklist-panel li { padding: 16px 0; display: flex; gap: 15px; border-top: 1px solid rgba(23,24,21,.25); }.checklist-panel li:last-child { border-bottom: 1px solid rgba(23,24,21,.25); }.checklist-panel i { width: 26px; height: 26px; display: grid; place-items: center; color: var(--paper-bright); background: var(--ink); border-radius: 50%; font: 700 12px var(--mono); }

.boundaries { padding: 140px 0 120px; }
.boundary-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; margin-bottom: 50px; }.boundary-heading .eyebrow { align-self: start; }.boundary-heading h2 { grid-column: 2; }
.boundary-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--ink); border: 1px solid var(--ink); }
.boundary-grid div { min-height: 190px; padding: 26px; background: var(--paper); }.boundary-grid b { color: var(--danger); font: 800 11px var(--mono); }.boundary-grid p { margin: 65px 0 0; font-size: 16px; font-weight: 700; }
.public-safety { margin-top: 38px; padding: 28px 32px; display: flex; align-items: center; gap: 24px; color: var(--paper); background: var(--ink); }
.shield { width: 58px; height: 58px; flex: 0 0 58px; display: grid; place-items: center; color: var(--safe); border: 1px solid var(--safe); border-radius: 50%; font-size: 34px; }.public-safety strong { color: var(--safe); font-size: 18px; }.public-safety p { margin: 4px 0 0; color: rgba(236,233,223,.65); }

footer { min-height: 170px; padding: 40px max(24px,calc((100vw - 1180px)/2)); display: flex; align-items: center; justify-content: space-between; gap: 25px; color: var(--paper); background: #0d0e0c; border-top: 6px solid var(--signal); }
.footer-mark { font: 500 28px var(--display); }.footer-mark span { color: rgba(236,233,223,.35); font: 10px var(--mono); }.footer-mark + p { color: rgba(236,233,223,.46); font-size: 12px; }
.noscript { position: fixed; left: 20px; right: 20px; bottom: 20px; z-index: 50; padding: 14px; color: var(--paper); background: var(--danger); text-align: center; font-weight: 700; }

@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(140,207,138,0); } }
@keyframes breathe { to { transform: scaleY(.6); filter: brightness(1.25); } }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }.site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 80px; }.hero-instrument { width: min(650px,100%); }
  .section-heading { grid-template-columns: 1fr; }.scenario-switcher { grid-template-columns: 1fr 1fr; }.scenario-button:nth-child(2) { border-right: 0; }.scenario-button:nth-child(-n+2) { border-bottom: 1px solid var(--ink); }
  .demo-console { grid-template-columns: 1fr; }.stage-rail { display: grid; grid-template-columns: repeat(6,1fr); padding: 16px; border-right: 0; border-bottom: 1px solid var(--line-dark); }.stage { min-height: auto; grid-template-columns: 1fr; text-align: center; }.stage:not(:last-child)::after { left: calc(50% + 14px); right: calc(-50% + 14px); top: 13px; bottom: auto; width: auto; height: 1px; }.stage b { margin: auto; }.stage span { display: none; }
  .output-section { grid-template-columns: 1fr; }.transcript-sheet { width: min(720px,100%); }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .rules-section { grid-template-columns: 1fr; }.rules-panel { padding-left: max(36px,calc((100vw - 900px)/2)); padding-right: max(36px,calc((100vw - 900px)/2)); }
  .boundary-heading { grid-template-columns: 1fr; }.boundary-heading h2 { grid-column: 1; }.boundary-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .mobile-only { display: block; }
  .section-shell { width: min(100% - 30px,1180px); }
  .privacy-strip { justify-content: center; text-align: center; }.privacy-strip span { display: none; }
  .site-header { min-height: 66px; padding: 0 15px; }.status-pill { font-size: 8px; }
  .hero { min-height: auto; padding: 68px 0 80px; gap: 50px; }.hero h1 { font-size: 45px; }.hero-lede { max-width: 100%; font-size: 16px; overflow-wrap: anywhere; word-break: break-all; }.hero-actions { align-items: flex-start; flex-direction: column; }.hero-metrics { gap: 8px; }.hero-metrics div { min-width: 0; padding-right: 4px; word-break: break-all; }.hero-metrics dt { font-size: 13px; }.hero-metrics dd { font-size: 10px; line-height: 1.45; }
  .hero-instrument { width: calc(100% - 8px); padding: 12px; box-shadow: 9px 9px 0 rgba(23,24,21,.1); transform: none; }.instrument-topline { font-size: 8px; }.wave-window { padding: 22px 14px 12px; }.seal { right: -2px; bottom: -37px; }
  .manifesto { padding: 90px 0; }.manifesto p { font-size: 15px; }
  .demo-section { padding: 80px 0; }.scenario-switcher { grid-template-columns: 1fr; }.scenario-button { border-right: 0; border-bottom: 1px solid var(--ink); }.scenario-button:last-child { border-bottom: 0; }
  .console-main { padding: 20px 16px; }.console-log { height: 350px; font-size: 11px; }.result-card { grid-template-columns: 1fr; }.run-button { font-size: 11px; }
  .output-section { padding: 90px 0; gap: 55px; }.transcript-sheet { padding: 38px 28px 58px; }.transcript-sheet::before { left: 15px; }.sheet-header { font-size: 8px; }.transcript-line { font-size: 14px; }
  .capabilities { padding: 80px 0 100px; }.capability-grid { grid-template-columns: 1fr; }.capability-grid article { min-height: 200px; }.capability-grid h3 { margin-top: 35px; }
  .rules-panel { padding: 70px 24px; }.quality-panel li { grid-template-columns: 70px 1fr; }
  .boundaries { padding: 90px 0; }.boundary-grid { grid-template-columns: 1fr; }.boundary-grid div { min-height: 150px; }.boundary-grid p { margin-top: 34px; }.public-safety { align-items: flex-start; padding: 24px 20px; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; }
}

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