:root {
  --graphite-950: #14161a;
  --graphite-900: #191c21;
  --graphite-850: #1e2126;
  --graphite-800: #212429;
  --graphite-750: #262a30;
  --graphite-600: #363a41;
  --graphite-500: #454a52;
  --graphite-400: #70757d;
  --graphite-300: #9da2aa;
  --graphite-200: #c6cad0;
  --graphite-100: #f0f0ed;
  --bronze-700: #703f14;
  --bronze-600: #874d1b;
  --bronze-500: #9c5a20;
  --bronze-400: #be7b39;
  --bronze-300: #d69c60;
  --positive: #85ac7d;
  --negative: #c4756b;
  --surface-page: var(--graphite-900);
  --surface-panel: var(--graphite-800);
  --surface-raised: var(--graphite-750);
  --border: var(--graphite-600);
  --border-strong: var(--graphite-500);
  --text-primary: var(--graphite-100);
  --text-body: var(--graphite-200);
  --text-muted: var(--graphite-300);
  --text-faint: var(--graphite-400);
  --accent: var(--bronze-500);
  --accent-light: var(--bronze-400);
  --font-sans: "Libre Franklin", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --focus-ring: 0 0 0 3px var(--accent-light);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--surface-page);
  color: var(--text-body);
  font: 15px/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, input { font: inherit; }
a { color: inherit; }
::selection { background: rgb(156 90 32 / 45%); color: var(--text-primary); }

.progress-line {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: 2px;
  background: var(--graphite-750);
}
.progress-line span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent-light);
  transition: width 200ms var(--ease-out);
}

.site-header { border-bottom: 1px solid var(--border); background: var(--surface-page); }
.header-inner, .footer-inner, .hero-inner, .diagnostic-layout {
  width: min(100% - 48px, 1180px);
  margin-inline: auto;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; min-width: 44px; min-height: 44px; color: var(--text-primary); font-size: 19px; font-weight: 600; letter-spacing: -.01em; text-decoration: none; }
.wordmark-logo { display: block; width: 28px; height: 28px; border-radius: 6px; }
.header-tag, .tagline, .mono-label {
  display: flex;
  align-items: center;
  margin: 0;
  color: var(--text-muted);
  font: 500 11px/1.3 var(--font-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.fio { display: inline-block; width: 26px; height: 2px; margin-right: 10px; background: var(--accent); }

.hero-stage {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 72% 50%, rgb(190 123 57 / 9%), transparent 32%),
    var(--surface-page);
}
.hero-stage::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image: linear-gradient(rgb(255 255 255 / 2%) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 2%) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(90deg, transparent 5%, #000 60%, transparent);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
  align-items: center;
  gap: clamp(36px, 6vw, 88px);
  min-height: min(760px, calc(100svh - 60px));
  max-height: 820px;
  padding-block: clamp(56px, 7vw, 92px);
}
.hero-copy { position: relative; z-index: 3; max-width: 600px; }
.hero-copy h1 {
  max-width: 11ch;
  margin: 24px 0 20px;
  color: var(--text-primary);
  font-size: clamp(44px, 5.5vw, 76px);
  font-weight: 600;
  letter-spacing: -.045em;
  line-height: .98;
}
.hero-copy h1 em { color: var(--accent-light); font-style: normal; }
.lede { max-width: 52ch; margin: 0 0 28px; color: var(--text-body); font-size: clamp(16px, 1.4vw, 18px); line-height: 1.65; }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--text-muted); font: 12px/1.5 var(--font-mono); }
.meta-row span::before { content: "→ "; color: var(--accent-light); }
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  margin-top: 34px;
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.hero-cta:hover { color: var(--accent-light); border-color: var(--accent-light); }
.hero-cta:focus-visible, .wordmark:focus-visible, footer a:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; box-shadow: none; }

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  height: clamp(380px, 44vw, 560px);
  isolation: isolate;
}
.logo-shell {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 560px);
  aspect-ratio: 1;
  padding: 0;
  cursor: grab;
  touch-action: pan-y;
  user-select: none;
  color: inherit;
  border: 0;
  background: transparent;
  -webkit-tap-highlight-color: transparent;
}
.logo-shell.is-dragging { cursor: grabbing; }
.logo-shell:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 4px; box-shadow: 0 0 0 6px rgb(190 123 57 / 12%); }
.logo-shell[aria-disabled="true"] { cursor: default; }
.logo3d { position: absolute; inset: 0; z-index: 1; opacity: 0; transition: opacity 400ms var(--ease-out); }
.logo3d canvas { display: block; width: 100%; height: 100%; }
.logo-shell.hero-ready .logo3d { opacity: 1; }
.model-status {
  position: absolute;
  z-index: 3;
  bottom: 5%;
  color: var(--text-faint);
  font: 10px/1.4 var(--font-mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.logo-shell.hero-ready .model-status, .logo-shell.hero-failed .model-status { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  margin: -1px;
  padding: 0;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.diagnostic-section { padding: clamp(72px, 9vw, 124px) 0; background: var(--graphite-850); }
.diagnostic-layout { display: grid; grid-template-columns: minmax(220px, 310px) minmax(0, 720px); justify-content: space-between; gap: clamp(48px, 8vw, 112px); }
.diagnostic-intro { position: sticky; top: 28px; align-self: start; }
.diagnostic-intro h2, .thanks h2 { margin: 20px 0 14px; color: var(--text-primary); font-size: clamp(28px, 3vw, 38px); font-weight: 600; letter-spacing: -.025em; line-height: 1.12; }
.diagnostic-intro > p:not(.mono-label) { margin: 0; color: var(--text-muted); }
.process-list { display: grid; gap: 0; padding: 0; margin: 34px 0 40px; list-style: none; border-top: 1px solid var(--border); }
.process-list li { display: flex; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--border); color: var(--text-body); font-size: 13px; }
.process-list span, .progress-kicker { color: var(--accent-light); font: 10px/1.6 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.progress-copy { display: grid; gap: 4px; padding-left: 16px; border-left: 2px solid var(--accent); }
.progress-copy strong { color: var(--text-primary); font-size: 15px; font-weight: 600; }

.diagnostic-form { min-width: 0; }
fieldset { min-width: 0; }
.question-card, .contact-card {
  margin: 0 0 14px;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-panel);
  transition: border-color 180ms var(--ease-out), background 180ms var(--ease-out);
}
.question-card.answered { border-color: var(--border-strong); background: color-mix(in srgb, var(--surface-panel) 92%, var(--bronze-500)); }
.question-card:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; box-shadow: none; }
legend { width: 100%; padding: 0; }
.q-num { display: block; color: var(--accent-light); font: 500 10px/1.4 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.q-title { display: block; margin-top: 7px; color: var(--text-primary); font-size: 18px; font-weight: 600; letter-spacing: -.015em; line-height: 1.35; }
.q-help { display: block; margin-top: 3px; color: var(--text-muted); font-size: 13.5px; }
.options { display: flex; flex-direction: column; gap: 8px; margin-top: 18px; }
.question-card[data-grid="2"] .options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.opt {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 11px 14px;
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-raised);
  transition: border-color 160ms var(--ease-out), background 160ms var(--ease-out), color 160ms var(--ease-out);
}
.opt:hover { border-color: var(--border-strong); }
.opt:has(input:checked) { border-color: var(--accent); background: rgb(156 90 32 / 12%); }
.opt:has(input:focus-visible) { outline: 2px solid var(--accent-light); outline-offset: 2px; box-shadow: none; }
.opt input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.dot { position: relative; flex: 0 0 16px; width: 16px; height: 16px; border: 1.5px solid var(--border-strong); border-radius: 50%; }
.opt:has(input:checked) .dot { border-color: var(--accent-light); }
.opt:has(input:checked) .dot::after { position: absolute; inset: 3px; content: ""; border-radius: 50%; background: var(--accent-light); }
.opt-body { display: flex; min-width: 0; flex-direction: column; gap: 1px; }
.opt-lead { color: var(--text-body); font-size: 14.5px; font-weight: 500; line-height: 1.4; }
.opt-num { color: var(--text-primary); font-size: 15.5px; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -.015em; }
.unit { color: var(--text-muted); font-size: 12.5px; font-weight: 400; line-height: 1.35; }

.contact-card { margin-top: 32px; background: var(--graphite-900); }
.contact-card.is-ready { border-color: var(--accent); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-full { grid-column: 1 / -1; }
.field label { color: var(--text-muted); font: 500 10px/1.4 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.field input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  outline: none;
  background: var(--surface-raised);
}
.field input::placeholder { color: var(--text-faint); }
.field input:focus-visible { border-color: var(--accent); outline: 2px solid var(--accent-light); outline-offset: 2px; box-shadow: none; }
.field input[aria-invalid="true"] { border-color: var(--negative); }
.consent { display: flex; align-items: flex-start; gap: 10px; min-height: 44px; margin-top: 18px; color: var(--text-muted); font-size: 13px; line-height: 1.5; }
.consent input { flex: 0 0 16px; width: 16px; height: 16px; margin-top: 3px; accent-color: var(--accent); }
.consent a { display: inline-flex; align-items: center; min-height: 44px; margin: -11px -2px; padding-inline: 2px; color: var(--accent-light); }
.actions { margin-top: 22px; }
.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 54px;
  padding: 14px 18px;
  cursor: pointer;
  color: #f5f4f1;
  border: 0;
  border-radius: 4px;
  background: var(--accent);
  font-size: 16px;
  font-weight: 600;
  transition: background 160ms var(--ease-out);
}
.cta:hover { background: var(--bronze-600); }
.cta:active { background: var(--bronze-700); }
.cta:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; box-shadow: none; }
.cta:disabled { cursor: wait; color: var(--text-faint); background: var(--graphite-600); }
.form-note { margin: 14px 0 0; color: var(--text-faint); text-align: center; font: 10px/1.5 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.inline-error { margin: 10px 0 0; color: var(--negative); font-size: 13px; font-weight: 500; }
.err { position: absolute; width: 1px; height: 1px; overflow: hidden; margin: -1px; padding: 0; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.thanks { align-self: start; padding: clamp(28px, 5vw, 52px); border: 1px solid var(--border); border-radius: 6px; background: var(--surface-panel); }
.thanks[hidden] { display: none; }
.checkline { color: var(--positive); font: 500 11px/1.4 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.thanks p { max-width: 58ch; }
.thanks .next { margin-top: 28px; padding-top: 20px; color: var(--text-muted); border-top: 1px solid var(--border); font-size: 13px; }

footer { padding: 30px 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
footer a { display: inline-flex; align-items: center; min-width: 44px; min-height: 44px; color: var(--text-muted); font-size: 13px; text-decoration: none; }
footer a:hover { color: var(--accent-light); }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; min-height: auto; max-height: none; gap: 8px; padding-block: 30px 52px; }
  .hero-visual { order: -1; height: clamp(240px, 70vw, 360px); }
  .logo-shell { max-width: 360px; }
  .hero-copy { max-width: 640px; }
  .hero-copy h1 { max-width: 12ch; font-size: clamp(40px, 11vw, 62px); }
  .diagnostic-layout { grid-template-columns: 1fr; }
  .diagnostic-intro { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 34px; }
  .diagnostic-intro .mono-label, .diagnostic-intro h2, .diagnostic-intro > p { grid-column: 1 / -1; }
  .process-list, .progress-copy { margin: 12px 0 0; }
  .model-status { display: none; }
}

@media (max-width: 560px) {
  .header-inner, .footer-inner, .hero-inner, .diagnostic-layout { width: min(100% - 32px, 1180px); }
  .header-tag { display: none; }
  .hero-stage::before { background-size: 48px 48px; }
  .hero-inner { padding-top: 20px; }
  .hero-visual { height: clamp(240px, 74vw, 310px); }
  .hero-copy h1 { margin-top: 18px; }
  .meta-row { gap: 8px 14px; }
  .diagnostic-section { padding-block: 64px; }
  .diagnostic-intro { display: block; }
  .progress-copy { margin-top: 28px; }
  .question-card, .contact-card { padding: 20px 16px; }
  .question-card[data-grid="2"] .options, .contact-grid { grid-template-columns: 1fr; }
  .field-full { grid-column: auto; }
  .opt { min-height: 56px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}