:root {
  --color-bg: #101615;
  --color-surface: #f4ead7;
  --color-surface-alt: #e6d8bd;
  --color-text: #17201c;
  --color-muted: #66736d;
  --color-primary: #d9833f;
  --color-primary-dark: #89451f;
  --color-secondary: #2e6f68;
  --color-accent: #f0c95a;
  --color-border: #c9b99b;
  --font-heading: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", "Manrope", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-code: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 28px;
  --shadow-soft: 0 18px 50px rgba(16, 22, 21, .18);
  --shadow-board: 0 28px 80px rgba(0, 0, 0, .34);
  --container: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background:
    radial-gradient(circle at 18% 5%, rgba(240, 201, 90, .18), transparent 28%),
    radial-gradient(circle at 86% 16%, rgba(46, 111, 104, .24), transparent 34%),
    var(--color-bg);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--color-secondary); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--color-primary-dark); }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--color-accent);
  color: var(--color-text);
}
.skip-link:focus { top: 16px; }

.site-shell { overflow: hidden; }

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 15;
  background: rgba(16, 22, 21, .86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(244, 234, 215, .14);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-surface);
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: .03em;
  text-decoration: none;
}

.logo-mark {
  width: 35px;
  height: 35px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(240, 201, 90, .62);
  border-radius: 12px 12px 12px 3px;
  background:
    linear-gradient(135deg, rgba(240, 201, 90, .2), rgba(46, 111, 104, .5)),
    #16211f;
  box-shadow: inset 0 0 0 1px rgba(244, 234, 215, .08);
  color: var(--color-accent);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 10px 12px;
  color: rgba(244, 234, 215, .84);
  text-decoration: none;
  border-radius: 999px;
  font-size: .95rem;
}

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

.header-cta {
  color: var(--color-surface);
  border-color: rgba(244, 234, 215, .3);
}

.page-band {
  padding: 86px 0 72px;
  background:
    linear-gradient(90deg, rgba(244, 234, 215, .08) 1px, transparent 1px) 0 0 / 46px 46px,
    linear-gradient(rgba(244, 234, 215, .06) 1px, transparent 1px) 0 0 / 46px 46px;
  color: var(--color-surface);
  position: relative;
}

.page-band:after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 90px;
  background: linear-gradient(transparent, var(--color-bg));
  pointer-events: none;
}

.page-band .container { position: relative; z-index: 1; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-family: var(--font-code);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.kicker:before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px rgba(240, 201, 90, .14);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.08;
  margin: 0;
}

h1 { font-size: clamp(2.45rem, 6vw, 5.9rem); letter-spacing: -.07em; }
h2 { font-size: clamp(2rem, 4vw, 3.55rem); letter-spacing: -.045em; }
h3 { font-size: clamp(1.28rem, 2vw, 1.75rem); letter-spacing: -.025em; }

.lead {
  font-size: clamp(1.08rem, 2vw, 1.32rem);
  max-width: 760px;
  color: rgba(244, 234, 215, .82);
}

.section {
  padding: 84px 0;
  background: var(--color-surface);
}

.section.dark {
  background:
    radial-gradient(circle at 12% 10%, rgba(217, 131, 63, .16), transparent 32%),
    var(--color-bg);
  color: var(--color-surface);
}

.section.alt { background: var(--color-surface-alt); }

.section-header {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, .75fr);
  gap: 42px;
  align-items: end;
  margin-bottom: 42px;
}

.section-header p {
  margin: 0;
  color: var(--color-muted);
  font-size: 1.05rem;
}

.dark .section-header p { color: rgba(244, 234, 215, .72); }

.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--color-primary); color: #fff8ec; box-shadow: 0 12px 30px rgba(137, 69, 31, .25); }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff8ec; }
.btn-secondary { background: rgba(244, 234, 215, .12); color: var(--color-surface); border-color: rgba(244, 234, 215, .34); }
.btn-secondary:hover { background: var(--color-surface); color: var(--color-bg); }
.btn-ghost { color: var(--color-text); border-color: var(--color-border); background: rgba(255,255,255,.22); }
.btn-ghost:hover { background: #fff7e8; }

.hero-board {
  padding: 74px 0 96px;
  color: var(--color-surface);
  position: relative;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(380px, 1.1fr);
  gap: 46px;
  align-items: center;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-copy p {
  color: rgba(244, 234, 215, .78);
  font-size: 1.16rem;
  max-width: 640px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 34px;
}

.fact-tile {
  padding: 14px;
  min-height: 104px;
  border: 1px solid rgba(244, 234, 215, .18);
  border-radius: var(--radius-md);
  background: rgba(244, 234, 215, .08);
}

.fact-tile strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  color: var(--color-accent);
}

.fact-tile span { color: rgba(244, 234, 215, .68); font-size: .9rem; }

.board-stage {
  position: relative;
  border: 12px solid #27332f;
  border-radius: 32px 32px 32px 8px;
  background:
    linear-gradient(90deg, rgba(244, 234, 215, .055) 1px, transparent 1px) 0 0 / 38px 38px,
    linear-gradient(rgba(244, 234, 215, .055) 1px, transparent 1px) 0 0 / 38px 38px,
    #17211f;
  min-height: 500px;
  padding: 26px;
  box-shadow: var(--shadow-board);
  overflow: hidden;
}

.board-stage:before {
  content: "aiboard.ru / idea-control-map";
  position: absolute;
  left: 26px;
  bottom: 18px;
  font-family: var(--font-code);
  font-size: .72rem;
  color: rgba(244, 234, 215, .38);
}

.board-stage img {
  display: block;
  width: 82%;
  margin: 28px auto 0;
  filter: drop-shadow(0 18px 25px rgba(0,0,0,.25));
}

.pin-card {
  position: absolute;
  width: min(210px, 45%);
  padding: 15px 15px 13px;
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 2px 14px 14px 14px;
  box-shadow: 0 18px 30px rgba(0,0,0,.18);
  transform: rotate(var(--pin-rotate, -2deg));
}

.pin-card:before {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: -8px;
  left: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.18), 0 3px 8px rgba(0,0,0,.25);
}

.pin-card small {
  display: block;
  color: var(--color-secondary);
  font-family: var(--font-code);
  text-transform: uppercase;
  letter-spacing: .09em;
  font-size: .7rem;
}

.pin-card strong { display: block; margin-top: 4px; line-height: 1.2; }
.pin-card p { margin: 8px 0 0; color: var(--color-muted); font-size: .9rem; line-height: 1.45; }

.pin-one { top: 42px; left: 28px; --pin-rotate: -3deg; }
.pin-two { top: 178px; right: 28px; --pin-rotate: 2deg; }
.pin-three { bottom: 64px; left: 64px; --pin-rotate: 1deg; }

.magnet-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid rgba(23, 32, 28, .12);
  border-radius: 999px;
  background: #fff8ec;
  color: var(--color-secondary);
  font-family: var(--font-code);
  font-size: .75rem;
  letter-spacing: .03em;
  white-space: nowrap;
}

.magnet-tag:before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

.magnet-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.concept-card {
  min-height: 320px;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #fff6e8;
  position: relative;
  overflow: hidden;
}

.concept-card:after {
  content: "";
  position: absolute;
  width: 90px;
  height: 90px;
  right: -18px;
  bottom: -18px;
  background:
    radial-gradient(circle, var(--color-primary) 0 6px, transparent 7px),
    radial-gradient(circle, var(--color-secondary) 0 4px, transparent 5px);
  background-size: 32px 32px, 24px 24px;
  opacity: .34;
  transform: rotate(8deg);
}

.concept-card:nth-child(2) { transform: translateY(28px); background: #edf1e5; }
.concept-card:nth-child(3) { background: #f7dfbd; }
.concept-card p { color: var(--color-muted); }

.decision-rail {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff8ec;
}

.rail-step {
  min-height: 260px;
  padding: 28px;
  position: relative;
  border-right: 1px dashed var(--color-border);
}

.rail-step:last-child { border-right: 0; }
.rail-step:before {
  content: attr(data-step);
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-accent);
  font-family: var(--font-code);
  margin-bottom: 28px;
}
.rail-step:after {
  content: "";
  position: absolute;
  left: 68px;
  top: 46px;
  width: calc(100% - 98px);
  border-top: 2px solid rgba(46, 111, 104, .25);
}
.rail-step p { color: var(--color-muted); }

.signal-ledger {
  border: 1px solid rgba(244, 234, 215, .18);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(244, 234, 215, .06);
}

.ledger-row {
  display: grid;
  grid-template-columns: 170px 1fr 230px;
  gap: 24px;
  padding: 22px 24px;
  border-bottom: 1px solid rgba(244, 234, 215, .13);
  align-items: start;
}
.ledger-row:last-child { border-bottom: 0; }
.ledger-label { font-family: var(--font-code); color: var(--color-accent); font-size: .84rem; }
.ledger-row p { margin: 0; color: rgba(244, 234, 215, .76); }
.ledger-row strong { color: var(--color-surface); }

.route-list {
  display: grid;
  gap: 18px;
  counter-reset: route;
}

.route-card {
  counter-increment: route;
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 22px;
  align-items: stretch;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #fff8ec;
}
.route-card:before {
  content: counter(route, decimal-leading-zero);
  display: grid;
  place-items: center;
  border-radius: 16px 16px 16px 4px;
  background:
    linear-gradient(135deg, rgba(240, 201, 90, .28), transparent),
    var(--color-bg);
  color: var(--color-accent);
  font-family: var(--font-code);
  font-size: 1.4rem;
}
.route-card p { margin-bottom: 0; color: var(--color-muted); }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(320px, 1.08fr);
  gap: 42px;
  align-items: start;
}

.board-note {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
  background:
    linear-gradient(90deg, rgba(46, 111, 104, .1) 1px, transparent 1px) 0 0 / 26px 26px,
    #fff8ec;
  box-shadow: var(--shadow-soft);
}
.board-note p { color: var(--color-muted); }

.protocol-strip {
  display: grid;
  gap: 14px;
}

.protocol-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 22px;
  padding: 20px;
  border-radius: 18px;
  background: #fff8ec;
  border: 1px solid var(--color-border);
}
.protocol-item time,
.protocol-item .protocol-code {
  font-family: var(--font-code);
  color: var(--color-primary-dark);
  font-size: .84rem;
}
.protocol-item p { margin: 4px 0 0; color: var(--color-muted); }

.rules-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.rule-card {
  padding: 24px;
  background: rgba(244, 234, 215, .08);
  border: 1px solid rgba(244, 234, 215, .18);
  border-radius: var(--radius-lg);
}
.rule-card p { color: rgba(244, 234, 215, .72); }

.check-list {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.check-list li {
  position: relative;
  padding-left: 34px;
}
.check-list li:before {
  content: "";
  position: absolute;
  left: 0;
  top: .42em;
  width: 18px;
  height: 18px;
  border-radius: 6px 6px 6px 2px;
  background: var(--color-accent);
  box-shadow: inset 0 0 0 5px rgba(16, 22, 21, .12);
}

.matrix {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff8ec;
}
.matrix-row {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  border-bottom: 1px solid var(--color-border);
}
.matrix-row:last-child { border-bottom: 0; }
.matrix-row > * { padding: 20px; }
.matrix-row strong { background: rgba(46, 111, 104, .09); }
.matrix-row p { margin: 0; color: var(--color-muted); }

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.scenario-card {
  min-height: 360px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: #fff8ec;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.scenario-card:before {
  content: "";
  position: absolute;
  inset: 14px 14px auto auto;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 1px solid rgba(46, 111, 104, .3);
  background: radial-gradient(circle, var(--color-primary) 0 5px, transparent 6px);
}
.scenario-card p { color: var(--color-muted); }

.offer-stack {
  display: grid;
  grid-template-columns: .8fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.offer-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(244, 234, 215, .2);
  background: rgba(244, 234, 215, .08);
}
.offer-card p { color: rgba(244, 234, 215, .72); }

.faq-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 34px;
  align-items: start;
}

.faq-aside {
  position: sticky;
  top: 104px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: #fff8ec;
  border: 1px solid var(--color-border);
}
.faq-aside p { color: var(--color-muted); }

.question-stack { display: grid; gap: 14px; }

.question-slot {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff8ec;
  overflow: hidden;
}
.question-slot summary {
  cursor: pointer;
  padding: 22px 24px;
  font-weight: 800;
  font-family: var(--font-heading);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 18px;
}
.question-slot summary::-webkit-details-marker { display: none; }
.question-slot summary:after {
  content: "+";
  font-family: var(--font-code);
  color: var(--color-primary-dark);
}
.question-slot[open] summary:after { content: "—"; }
.question-slot div { padding: 0 24px 24px; color: var(--color-muted); }
.question-slot div p:last-child { margin-bottom: 0; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(360px, 1fr);
  gap: 34px;
  align-items: start;
}

.brief-dock {
  padding: 28px;
  border-radius: 34px 34px 34px 8px;
  background:
    linear-gradient(90deg, rgba(23, 32, 28, .06) 1px, transparent 1px) 0 0 / 28px 28px,
    #fff8ec;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.form-grid { display: grid; gap: 16px; }
.form-row { display: grid; gap: 7px; }
label { font-weight: 800; font-size: .95rem; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #fffdf7;
  padding: 13px 14px;
  font: inherit;
  color: var(--color-text);
}
textarea { min-height: 128px; resize: vertical; }
.form-hint { margin: 10px 0 0; color: var(--color-muted); font-size: .92rem; }

.contact-card {
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(244, 234, 215, .2);
  background: rgba(244, 234, 215, .08);
}
.contact-card p { color: rgba(244, 234, 215, .74); }
.contact-card a { color: var(--color-accent); }

.image-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: #fff8ec;
  padding: 18px;
  box-shadow: var(--shadow-soft);
}
.image-panel figcaption { color: var(--color-muted); font-size: .92rem; margin-top: 10px; }

.breadcrumbs {
  margin-bottom: 18px;
  font-size: .9rem;
  color: rgba(244, 234, 215, .7);
}
.breadcrumbs a { color: rgba(244, 234, 215, .86); }

.article-body {
  max-width: 860px;
}
.article-body p { color: var(--color-muted); font-size: 1.05rem; }
.article-body ul, .article-body ol { color: var(--color-muted); }
.article-body li + li { margin-top: 8px; }
.article-body .board-note { margin: 28px 0; }

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

@media (max-width: 680px) {
  .media-grid { grid-template-columns: 1fr; }
}

.site-footer {
  padding: 52px 0;
  color: rgba(244, 234, 215, .72);
  background: #0b0f0e;
  border-top: 1px solid rgba(244, 234, 215, .14);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
}
.footer-grid h2, .footer-grid h3 { color: var(--color-surface); font-size: 1.1rem; letter-spacing: 0; }
.footer-grid a { color: rgba(244, 234, 215, .82); }
.footer-links { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }

.tiny-meta {
  font-family: var(--font-code);
  font-size: .78rem;
  color: rgba(244, 234, 215, .45);
}

@media (max-width: 980px) {
  .header-inner { align-items: flex-start; padding: 14px 0; flex-direction: column; }
  .site-nav ul { flex-wrap: wrap; }
  .hero-layout, .section-header, .two-col, .faq-layout, .contact-grid, .offer-stack { grid-template-columns: 1fr; }
  .board-stage { min-height: 470px; }
  .concept-grid, .scenario-grid { grid-template-columns: 1fr 1fr; }
  .decision-rail { grid-template-columns: 1fr; }
  .rail-step { border-right: 0; border-bottom: 1px dashed var(--color-border); }
  .rail-step:last-child { border-bottom: 0; }
  .matrix-row { grid-template-columns: 1fr; }
  .ledger-row { grid-template-columns: 1fr; gap: 8px; }
  .faq-aside { position: static; }
}

@media (max-width: 680px) {
  .section, .hero-board, .page-band { padding: 58px 0; }
  .hero-facts, .concept-grid, .scenario-grid, .rules-grid, .footer-grid { grid-template-columns: 1fr; }
  .board-stage { min-height: 620px; padding: 18px; border-width: 8px; }
  .board-stage img { width: 100%; margin-top: 140px; }
  .pin-card { width: calc(100% - 40px); left: 20px !important; right: auto !important; }
  .pin-one { top: 26px; }
  .pin-two { top: 180px; }
  .pin-three { bottom: 36px; }
  .route-card { grid-template-columns: 1fr; }
  .protocol-item { grid-template-columns: 1fr; }
  .site-nav a { padding: 8px 10px; }
  h1 { letter-spacing: -.045em; }
}

@media (prefers-reduced-motion: no-preference) {
  .pin-card { transition: transform .24s ease, box-shadow .24s ease; }
  .board-stage:hover .pin-card { transform: rotate(0deg) translateY(-3px); box-shadow: 0 24px 36px rgba(0,0,0,.22); }
  .question-slot, .scenario-card, .concept-card, .route-card { transition: transform .2s ease, box-shadow .2s ease; }
  .question-slot:hover, .scenario-card:hover, .concept-card:hover, .route-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }
}