:root {
  --signal-paper: #f4f1e9;
  --signal-card: #fffcf5;
  --signal-ink: #14231f;
  --signal-muted: #5e6a64;
  --signal-line: #d7d9ce;
  --signal-ember: #d9653b;
  --signal-green: #17745a;
  --signal-gold: #b97a1e;
  --signal-dark: #10221d;
  --signal-mono: "IBM Plex Mono", ui-monospace, monospace;
  --signal-sans: Inter, system-ui, sans-serif;
  --signal-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--signal-paper); color: var(--signal-ink); font-family: var(--signal-sans); }
body::selection { background: #f1bea8; color: var(--signal-dark); }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 11px 16px; border-radius: 10px; background: var(--signal-dark); color: #fff; }
.skip-link:focus { top: 12px; }
.signal-nav { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid rgba(20,35,31,.1); background: rgba(244,241,233,.9); backdrop-filter: blur(18px); }
.signal-nav-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.signal-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--signal-ink); text-decoration: none; font-weight: 700; letter-spacing: -.02em; }
.signal-brand small { padding-left: 3px; color: var(--signal-muted); font: 500 11px var(--signal-mono); letter-spacing: .02em; }
.signal-mark { width: 27px; height: 27px; display: inline-flex; align-items: end; justify-content: center; gap: 3px; padding: 6px; border-radius: 8px; background: var(--signal-dark); }
.signal-mark i { display: block; width: 3px; border-radius: 3px; background: #f8d8c8; }
.signal-mark i:nth-child(1) { height: 6px; }
.signal-mark i:nth-child(2) { height: 13px; background: #ee8a64; }
.signal-mark i:nth-child(3) { height: 9px; background: #7fc3ab; }
.signal-nav nav { display: flex; align-items: center; gap: 24px; }
.signal-nav nav > a:not(.signal-button) { color: var(--signal-muted); text-decoration: none; font-size: 13px; font-weight: 600; }
.signal-nav nav > a:not(.signal-button):hover { color: var(--signal-ink); }
.signal-button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 52px; padding: 0 22px; border: 1px solid var(--signal-ember); border-radius: 12px; background: var(--signal-ember); color: #fff; text-decoration: none; font-size: 14px; font-weight: 700; box-shadow: 0 14px 34px -18px rgba(111,42,19,.8); transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.signal-button:hover { transform: translateY(-2px); background: #c85630; box-shadow: 0 18px 38px -18px rgba(111,42,19,.85); }
.signal-button:focus-visible, .scan-button:focus-visible, .result-tabs button:focus-visible, #copy-skill:focus-visible, a:focus-visible { outline: 3px solid rgba(217,101,59,.34); outline-offset: 4px; }
.signal-button.compact { min-height: 40px; padding: 0 16px; border-radius: 10px; font-size: 12px; }
.signal-button.large { min-height: 60px; padding: 0 26px; }

.signal-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--signal-line); background: radial-gradient(circle at 80% 22%, rgba(216,101,59,.16), transparent 34%), linear-gradient(180deg, #faf8f2, var(--signal-paper)); }
.signal-grid { position: absolute; inset: 0; opacity: .42; background-image: linear-gradient(rgba(20,35,31,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(20,35,31,.045) 1px, transparent 1px); background-size: 36px 36px; mask-image: linear-gradient(to bottom, #000, transparent 88%); }
.signal-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.02fr) minmax(420px,.98fr); align-items: center; gap: clamp(44px, 7vw, 88px); min-height: 690px; padding-top: 78px; padding-bottom: 88px; }
.signal-eyebrow { margin: 0 0 18px; color: var(--signal-ember); font: 700 11px/1.4 var(--signal-mono); letter-spacing: .13em; text-transform: uppercase; }
.signal-eyebrow.light { color: #f1a182; }
.signal-hero h1, .signal-section h2 { font-family: var(--signal-serif); font-weight: 600; letter-spacing: -.045em; }
.signal-hero h1 { max-width: 770px; margin: 0; font-size: clamp(52px, 6.3vw, 84px); line-height: .98; }
.signal-lede { max-width: 660px; margin: 28px 0 0; color: var(--signal-muted); font-size: clamp(18px, 2vw, 21px); line-height: 1.62; }
.signal-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 34px; }
.signal-text-link { color: var(--signal-ink); font-size: 14px; font-weight: 700; text-underline-offset: 5px; }
.signal-promises { display: flex; flex-wrap: wrap; gap: 12px 20px; margin: 27px 0 0; padding: 0; list-style: none; color: var(--signal-muted); font-size: 12px; }
.signal-promises li { display: inline-flex; align-items: center; gap: 7px; }
.signal-promises span { display: grid; width: 19px; height: 19px; place-items: center; border-radius: 50%; background: rgba(23,116,90,.1); color: var(--signal-green); font-weight: 800; }

.trace-card { position: relative; overflow: hidden; padding: 25px; border: 1px solid rgba(20,35,31,.14); border-radius: 22px; background: rgba(255,252,245,.92); box-shadow: 0 36px 80px -42px rgba(20,35,31,.45); }
.trace-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg,var(--signal-green),#65aa91 38%,var(--signal-gold) 68%,var(--signal-ember)); }
.trace-topline { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding-bottom: 22px; border-bottom: 1px solid var(--signal-line); }
.trace-topline > div { display: grid; gap: 5px; }
.trace-label { color: var(--signal-muted); font: 500 10px var(--signal-mono); letter-spacing: .08em; text-transform: uppercase; }
.trace-topline strong { font: 700 20px var(--signal-sans); }
.trace-status { display: inline-flex; align-items: center; gap: 7px; color: var(--signal-green); font: 600 10px var(--signal-mono); text-transform: uppercase; }
.trace-status i { width: 7px; height: 7px; border-radius: 50%; background: var(--signal-green); box-shadow: 0 0 0 5px rgba(23,116,90,.1); }
.trace-list { margin: 0; padding: 13px 0; list-style: none; }
.trace-list li { position: relative; display: grid; grid-template-columns: 34px minmax(0,1fr) auto; align-items: center; gap: 12px; min-height: 72px; }
.trace-list li:not(:last-child)::after { content: ""; position: absolute; left: 16px; top: 48px; bottom: -21px; width: 1px; background: var(--signal-line); }
.trace-node { position: relative; z-index: 1; display: grid; width: 33px; height: 33px; place-items: center; border: 1px solid var(--signal-line); border-radius: 50%; background: var(--signal-card); color: var(--signal-muted); font: 600 9px var(--signal-mono); }
.trace-list li.complete .trace-node { border-color: rgba(23,116,90,.34); color: var(--signal-green); }
.trace-list li.partial .trace-node { border-color: rgba(185,122,30,.4); color: var(--signal-gold); }
.trace-list li div { display: grid; gap: 4px; }
.trace-list li strong { font-size: 13px; }
.trace-list li small { color: var(--signal-muted); font: 400 10px var(--signal-mono); }
.trace-list li b { padding: 5px 8px; border-radius: 6px; background: rgba(23,116,90,.08); color: var(--signal-green); font: 600 9px var(--signal-mono); text-transform: uppercase; }
.trace-list li.partial b { background: rgba(185,122,30,.1); color: #8d5b14; }
.trace-outcome { display: grid; gap: 6px; padding: 18px; border-radius: 14px; background: var(--signal-dark); color: #fff; }
.trace-outcome span { color: #9eb7ae; font: 500 9px var(--signal-mono); letter-spacing: .08em; text-transform: uppercase; }
.trace-outcome strong { font-family: var(--signal-serif); font-size: 24px; }
.trace-outcome small { color: #9eb7ae; font-size: 9px; line-height: 1.45; }

.signal-proof-strip { border-bottom: 1px solid var(--signal-line); background: var(--signal-card); }
.signal-proof-strip .wrap { min-height: 64px; display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 15px; color: var(--signal-muted); font: 500 10px var(--signal-mono); letter-spacing: .07em; text-transform: uppercase; }
.signal-proof-strip i { width: 3px; height: 3px; border-radius: 50%; background: var(--signal-ember); }

.signal-section { padding: 110px 0; }
.signal-section h2 { max-width: 720px; margin: 0; font-size: clamp(42px, 5vw, 66px); line-height: 1.02; }
.section-intro > p:not(.signal-eyebrow):not(.sample-note) { max-width: 650px; margin: 24px 0 0; color: var(--signal-muted); font-size: 17px; line-height: 1.7; }
.section-intro.centered { display: grid; justify-items: center; text-align: center; }

.sample-section { background: #ede9df; }
.sample-grid { display: grid; grid-template-columns: minmax(300px,.72fr) minmax(520px,1.28fr); align-items: center; gap: clamp(42px,7vw,92px); }
.scan-button { display: inline-flex; align-items: center; gap: 22px; margin-top: 30px; padding: 0; border: 0; border-bottom: 1px solid var(--signal-ink); background: transparent; color: var(--signal-ink); font: 700 14px/2.2 var(--signal-sans); cursor: pointer; }
.scan-button:disabled { opacity: .62; cursor: wait; }
.sample-note { max-width: 430px; margin: 16px 0 0; color: var(--signal-muted); font-size: 11px; line-height: 1.55; }
.diagnosis-shell { overflow: hidden; border: 1px solid rgba(20,35,31,.18); border-radius: 18px; background: var(--signal-card); box-shadow: 0 34px 80px -46px rgba(20,35,31,.55); }
.diagnosis-bar { display: grid; grid-template-columns:auto minmax(0,1fr) auto; align-items: center; gap: 14px; min-height: 48px; padding: 0 16px; border-bottom: 1px solid var(--signal-line); background: #e4e1d8; color: var(--signal-muted); font: 500 9px var(--signal-mono); }
.diagnosis-bar > div { display: flex; gap: 5px; }
.diagnosis-bar i { display: block; width: 8px; height: 8px; border-radius: 50%; background: #c5c4bc; }
.diagnosis-bar i:nth-child(1) { background: #d88365; }
.diagnosis-bar i:nth-child(2) { background: #d4a555; }
.diagnosis-bar i:nth-child(3) { background: #78aa92; }
.diagnosis-bar em { font-style: normal; text-transform: uppercase; }
.diagnosis-body { padding: 20px; }
.diagnosis-progress { height: 3px; overflow: hidden; border-radius: 999px; background: #e3e2db; }
.diagnosis-progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg,var(--signal-green),var(--signal-ember)); transition: width .5s ease; }
.diagnosis-summary { display: grid; grid-template-columns: 1.25fr 1fr 1fr; gap: 10px; padding: 18px 0; }
.diagnosis-summary > div { display: grid; gap: 6px; min-height: 112px; align-content: center; padding: 15px; border: 1px solid var(--signal-line); border-radius: 11px; background: #faf8f2; }
.diagnosis-summary span { color: var(--signal-muted); font: 500 9px var(--signal-mono); text-transform: uppercase; }
.diagnosis-summary strong { font-family: var(--signal-serif); font-size: 32px; font-weight: 600; }
.readiness-score strong { color: var(--signal-green); }
.diagnosis-summary small { color: var(--signal-muted); font-size: 9px; line-height: 1.35; }
.result-tabs { display: flex; gap: 20px; border-bottom: 1px solid var(--signal-line); }
.result-tabs button { position: relative; padding: 11px 2px; border: 0; background: transparent; color: var(--signal-muted); font: 600 10px var(--signal-mono); cursor: pointer; }
.result-tabs button[aria-selected="true"] { color: var(--signal-ink); }
.result-tabs button[aria-selected="true"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--signal-ember); }
.result-panel { min-height: 304px; padding-top: 12px; }
.result-panel[hidden] { display: none; }
.evidence-list { margin: 0; padding: 0; list-style: none; }
.evidence-list li { display: grid; grid-template-columns: 30px minmax(0,1fr) auto; align-items: center; gap: 10px; min-height: 66px; border-bottom: 1px solid #eceae3; }
.evidence-icon { display: grid; width: 24px; height: 24px; place-items: center; border-radius: 50%; font: 700 11px var(--signal-mono); }
.evidence-icon.ready { background: rgba(23,116,90,.1); color: var(--signal-green); }
.evidence-icon.unknown { background: rgba(185,122,30,.11); color: var(--signal-gold); }
.evidence-list li > div { display: grid; gap: 4px; }
.evidence-list strong, .opportunity-grid strong { font-size: 11px; }
.evidence-list small, .opportunity-grid small { color: var(--signal-muted); font-size: 9px; line-height: 1.4; }
.evidence-list b, .opportunity-grid b { color: var(--signal-muted); font: 600 8px var(--signal-mono); text-transform: uppercase; }
.opportunity-grid { display: grid; gap: 9px; padding-top: 4px; }
.opportunity-grid article { display: grid; grid-template-columns: 32px minmax(0,1fr) auto; align-items: center; gap: 12px; min-height: 78px; padding: 10px 12px; border: 1px solid var(--signal-line); border-radius: 10px; background: #faf8f2; }
.opportunity-grid article > div { display: grid; gap: 4px; }
.opportunity-rank { color: var(--signal-ember); font: 600 10px var(--signal-mono); }
.candidate-table { display: grid; padding-top: 3px; }
.candidate-row { display: grid; grid-template-columns: 1fr 1.2fr 1.7fr .65fr; gap: 10px; align-items: center; min-height: 57px; border-bottom: 1px solid #eceae3; color: var(--signal-muted); font-size: 9px; }
.candidate-head { min-height: 38px; color: var(--signal-muted); font: 600 8px var(--signal-mono); text-transform: uppercase; }
.candidate-row code { color: var(--signal-ink); font-family: var(--signal-mono); }
.candidate-row b { color: var(--signal-green); font: 600 8px var(--signal-mono); text-transform: uppercase; }
.candidate-safety { display: flex; align-items: center; gap: 7px; margin: 15px 0 0; color: var(--signal-muted); font-size: 9px; }
.candidate-safety span { color: var(--signal-green); font-size: 16px; }

.process-section { border-top: 1px solid var(--signal-line); background: var(--signal-card); }
.process-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; margin-top: 68px; }
.process-grid article { position: relative; min-height: 310px; padding: 26px 42px 28px 0; border-top: 1px solid var(--signal-line); }
.process-grid article:not(:last-child) { border-right: 1px solid var(--signal-line); }
.process-grid article:not(:first-child) { padding-left: 42px; }
.process-grid article > span { position: absolute; top: -14px; left: 0; display: grid; width: 28px; height: 28px; place-items: center; border-radius: 50%; background: var(--signal-ember); color: #fff; font: 600 8px var(--signal-mono); }
.process-grid article:not(:first-child) > span { left: 42px; }
.process-grid h3 { margin: 54px 0 15px; font-family: var(--signal-serif); font-size: 30px; letter-spacing: -.035em; }
.process-grid p { color: var(--signal-muted); font-size: 14px; line-height: 1.7; }
.process-grid small { position: absolute; left: 0; bottom: 28px; color: var(--signal-green); font: 500 9px var(--signal-mono); text-transform: uppercase; }
.process-grid article:not(:first-child) small { left: 42px; }

.roles-section { background: #ede9df; }
.roles-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(46px,8vw,108px); }
.role-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.role-cards article { min-height: 164px; display: grid; align-content: space-between; padding: 21px; border: 1px solid var(--signal-line); border-radius: 14px; background: var(--signal-card); }
.role-glyph { color: var(--signal-ember); font: 400 25px var(--signal-serif); }
.role-cards h3 { margin: 0 0 7px; font-family: var(--signal-serif); font-size: 21px; }
.role-cards p { margin: 0; color: var(--signal-muted); font-size: 12px; line-height: 1.5; }

.privacy-section { background: var(--signal-dark); color: #edf2ef; }
.privacy-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: clamp(48px,8vw,112px); align-items: start; }
.privacy-grid > div > p:not(.signal-eyebrow) { max-width: 620px; color: #9eb7ae; font-size: 17px; line-height: 1.7; }
.privacy-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.14); }
.privacy-list li { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.privacy-list span { color: #f2a182; font: 600 10px var(--signal-mono); text-transform: uppercase; }
.privacy-list p { margin: 0; color: #b9cbc4; font-size: 13px; line-height: 1.6; }

.agent-section { background: var(--signal-card); }
.agent-grid { display: grid; grid-template-columns: .88fr 1.12fr; align-items: center; gap: clamp(48px,8vw,112px); }
.agent-terminal { overflow: hidden; border: 1px solid #263c35; border-radius: 16px; background: #0b1714; color: #d9e7e1; box-shadow: 0 30px 70px -42px #000; }
.terminal-top { min-height: 44px; display: flex; align-items: center; gap: 6px; padding: 0 15px; border-bottom: 1px solid #263c35; color: #81988f; font: 500 8px var(--signal-mono); text-transform: uppercase; }
.terminal-top i { width: 7px; height: 7px; border-radius: 50%; background: #d9653b; }
.terminal-top i:nth-child(2) { background: #b97a1e; }
.terminal-top i:nth-child(3) { background: #51947c; }
.terminal-top span { margin-left: 8px; }
.agent-terminal pre { min-height: 265px; margin: 0; padding: 25px; overflow: auto; font: 500 12px/1.9 var(--signal-mono); }
.agent-terminal code span { color: #77958a; }
#copy-skill { margin: 0 25px 24px; padding: 9px 12px; border: 1px solid #476359; border-radius: 8px; background: transparent; color: #d9e7e1; font: 600 9px var(--signal-mono); cursor: pointer; }
#copy-status { min-height: 18px; margin: -16px 25px 12px; color: #7fc3ab; font: 500 8px var(--signal-mono); }
.agent-links { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 28px; }
.agent-links a { color: var(--signal-ink); font-size: 13px; font-weight: 700; text-underline-offset: 4px; }

.signup-section { padding-top: 20px; background: var(--signal-card); }
.signup-card { display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 54px; padding-top: 58px; padding-bottom: 58px; border-top: 1px solid var(--signal-line); }
.signup-card h2 { font-size: clamp(40px,4.5vw,58px); }
.signup-card > div > p:not(.signal-eyebrow) { max-width: 690px; color: var(--signal-muted); line-height: 1.7; }
.signup-state { padding-left: 14px; border-left: 3px solid var(--signal-gold); font-size: 11px; }
.signup-action { display: grid; gap: 14px; justify-items: stretch; }
.signup-action small { color: var(--signal-muted); font-size: 10px; line-height: 1.5; text-align: center; }
.signal-footer { border-top: 1px solid var(--signal-line); background: #e8e3d8; }
.signal-footer .wrap { min-height: 150px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.signal-footer p { margin: 9px 0 0; color: var(--signal-muted); font-size: 11px; }
.signal-footer nav { display: flex; flex-wrap: wrap; gap: 22px; }
.signal-footer nav a { color: var(--signal-muted); font-size: 11px; font-weight: 600; }

@media (max-width: 980px) {
  .signal-hero-grid, .sample-grid, .roles-grid, .privacy-grid, .agent-grid { grid-template-columns: 1fr; }
  .signal-hero-grid { padding-top: 64px; }
  .trace-card { max-width: 660px; }
  .sample-grid, .agent-grid { gap: 58px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid article, .process-grid article:not(:first-child) { min-height: 220px; padding: 26px 0 28px; border-right: 0; }
  .process-grid article:not(:first-child) > span { left: 0; }
  .process-grid article:not(:first-child) small { left: 0; }
  .signup-card { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .signal-nav-inner { min-height: 62px; }
  .signal-brand small, .signal-nav nav > a:not(.signal-button) { display: none; }
  .signal-nav nav { gap: 0; }
  .signal-hero-grid { min-height: 0; padding-top: 50px; padding-bottom: 60px; }
  .signal-hero h1 { font-size: clamp(44px, 13vw, 63px); }
  .signal-section { padding: 78px 0; }
  .signal-section h2 { font-size: clamp(38px, 11vw, 52px); }
  .diagnosis-summary { grid-template-columns: 1fr 1fr; }
  .readiness-score { grid-column: 1 / -1; }
  .candidate-row { grid-template-columns: 1fr 1.3fr .7fr; }
  .candidate-row > :nth-child(3) { display: none; }
  .role-cards { grid-template-columns: 1fr; }
  .role-cards article { min-height: 130px; }
  .privacy-list li { grid-template-columns: 1fr; gap: 8px; }
  .signup-card { padding-top: 42px; padding-bottom: 42px; }
  .signal-footer .wrap { padding-top: 35px; padding-bottom: 35px; align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .signal-nav .wrap { padding-left: 15px; padding-right: 15px; }
  .signal-button.compact { min-height: 38px; padding: 0 12px; font-size: 11px; }
  .signal-actions { align-items: stretch; flex-direction: column; }
  .signal-text-link { text-align: center; }
  .signal-button { width: 100%; }
  .signal-promises { display: grid; }
  .trace-card { padding: 18px; border-radius: 16px; }
  .trace-topline { align-items: stretch; flex-direction: column; }
  .trace-list li { grid-template-columns: 30px minmax(0,1fr); }
  .trace-list li b { grid-column: 2; justify-self: start; }
  .diagnosis-body { padding: 14px; }
  .diagnosis-bar { grid-template-columns: auto 1fr; }
  .diagnosis-bar em { display: none; }
  .diagnosis-summary { grid-template-columns: 1fr; }
  .readiness-score { grid-column: auto; }
  .result-tabs { justify-content: space-between; gap: 8px; }
  .evidence-list li { grid-template-columns: 28px minmax(0,1fr); padding: 7px 0; }
  .evidence-list li b { grid-column: 2; justify-self: start; }
  .opportunity-grid article { grid-template-columns: 28px minmax(0,1fr); }
  .opportunity-grid b { grid-column: 2; }
  .candidate-row { grid-template-columns: 1fr 1.2fr; }
  .candidate-row > :nth-child(3), .candidate-row > :nth-child(4) { display: none; }
  .agent-terminal pre { font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .signal-button:hover { transform: none; }
}