/* ============================================================
   OrtoBio × Doctor.School — питч для фарма-спонсоров
   Палитра — из токенов ds-platform (packages/design-system/tokens):
   blue.300/400/500/700 брендовые якоря; neutral.* oklch hue 250;
   orange.500 (warning) — контр-цвет «сгорающей» модели;
   green.500 (success) — верное решение в демо-кейсе.
   ============================================================ */

:root {
  /* neutral ramp (semantic.dark) */
  --bg:        oklch(0.16 0.02 250);   /* neutral.950 */
  --bg-raise:  oklch(0.19 0.02 250);   /* между 950 и 900 — секции-прослойки */
  --card:      oklch(0.21 0.02 250);   /* neutral.900 */
  --card-hi:   oklch(0.27 0.018 250);  /* neutral.800 */
  --text:      oklch(0.985 0.002 250); /* neutral.50 */
  --muted:     oklch(0.704 0.01 250);  /* neutral.400 */
  --border:    oklch(1 0 0 / 10%);     /* neutral.alpha-10 */
  --border-hi: oklch(1 0 0 / 18%);

  /* brand blues */
  --blue:       #2D84F2;  /* blue.500 */
  --blue-light: #6BB1F7;  /* blue.300 (ring) */
  --blue-hover: #4C9BF5;  /* blue.400 */
  --blue-deep:  #114D9E;  /* blue.700 */
  --blue-tint:  #AED4FB;  /* blue.200 */

  /* status */
  --ember:   #DF5726;     /* orange.500 — «сгорающая» модель */
  --success: #009959;     /* green.500 */
  --danger:  #E15555;     /* red.400 */

  --font-display: "Piazzolla", Georgia, serif;
  --font-body: "Golos Text", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --wrap: 1120px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

a { color: var(--blue-light); }

:focus-visible {
  outline: 2px solid var(--blue-light);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--blue-deep); color: var(--text); }

.mono-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px;
  background: transparent; z-index: 60;
}
.scroll-progress span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--blue-deep), var(--blue));
}

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-row {
  display: flex; align-items: center; gap: 32px;
  height: 64px;
}
.nav-logo { display: flex; align-items: center; }
.nav-logo img { display: block; }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a {
  color: var(--muted); text-decoration: none;
  font-size: 14px; letter-spacing: .01em;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }

/* ---------- типографика секций ---------- */
.folio {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  color: var(--blue-light);
  border: 1px solid var(--border-hi); border-radius: 3px;
  padding: 3px 8px; letter-spacing: .08em;
  flex-shrink: 0;
}
.eyebrow {
  display: flex; align-items: center; gap: 14px;
  font-family: var(--font-mono); font-size: 13px;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted);
}
.sec-head {
  display: flex; align-items: baseline; gap: 18px;
  padding-top: 34px; margin-bottom: 40px;
  border-top: 1px solid var(--border);
}
.sec-head h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 600; line-height: 1.18;
  letter-spacing: -0.01em;
  max-width: 21ch;
}
.section { padding: 96px 0; }
.sec-alt { background: var(--bg-raise); }
.lede {
  font-size: 19px; color: var(--muted);
  max-width: 62ch; margin-bottom: 40px;
}
.lede .formula { color: var(--blue-light); font-size: 16px; white-space: nowrap; }

/* ---------- hero ---------- */
.hero { padding: 120px 0 100px; }
.hero .eyebrow { margin-bottom: 34px; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(38px, 6.4vw, 74px);
  font-weight: 700; line-height: 1.08;
  letter-spacing: -0.015em;
  max-width: 18ch;
}
.hero-title .line { display: block; }
.hero-title em {
  font-style: italic; color: var(--blue-light); font-weight: 600;
}
.hero-sub {
  margin-top: 30px; max-width: 58ch;
  font-size: 19px; color: var(--muted);
}
.hero-ledger {
  display: grid; grid-template-columns: 1fr 1fr;
  margin-top: 52px; border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
}
.ledger-col { padding: 26px 30px; display: grid; gap: 8px; }
.ledger-old { border-right: 1px solid var(--border); }
.ledger-tag {
  font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: .1em;
}
.ledger-old .ledger-tag { color: var(--ember); }
.ledger-new .ledger-tag { color: var(--blue-light); }
.ledger-new { background: color-mix(in oklab, var(--blue-deep) 14%, transparent); }
.ledger-num {
  font-family: var(--font-mono); font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700; letter-spacing: -0.02em;
}
.ledger-desc { font-size: 14.5px; color: var(--muted); max-width: 34ch; }
.hero-founder {
  margin-top: 44px; font-size: 14px; color: var(--muted);
}

/* ---------- 02 статус-кво ---------- */
.pain-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
}
.pain { background: var(--bg); padding: 26px 24px; }
.sec-alt .pain { background: var(--bg-raise); }
.pain h3 {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--blue-light); margin-bottom: 12px;
}
.pain p { font-size: 15px; color: var(--muted); }

.stat-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
  margin: 64px 0;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stat-num {
  display: block;
  font-family: var(--font-mono); font-size: clamp(40px, 5vw, 58px);
  font-weight: 700; line-height: 1; letter-spacing: -0.03em;
  color: var(--text); margin-bottom: 14px;
}
.stat-label { font-size: 14.5px; color: var(--muted); max-width: 32ch; display: block; }

.crisis-list { display: grid; grid-template-columns: 1fr 1fr; gap: 36px 56px; }
.crisis h4 {
  font-family: var(--font-display); font-size: 21px; font-weight: 600;
  margin-bottom: 10px;
}
.crisis p { font-size: 15.5px; color: var(--muted); }

/* ---------- 03 решение + демо ---------- */
.sol-cols {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px;
  align-items: start;
}
.sol-list { list-style: none; display: grid; gap: 18px; margin-bottom: 40px; }
.sol-list li {
  position: relative; padding-left: 26px;
  font-size: 16px; color: var(--muted);
}
.sol-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 12px; height: 2px; background: var(--blue);
}
.arch-facts {
  display: grid; gap: 12px;
  border-left: 2px solid var(--blue-deep);
  padding-left: 22px;
  font-size: 15px; color: var(--muted);
}
.arch-facts .mono-num {
  color: var(--text); font-weight: 700; font-size: 17px;
}

.demo-case {
  background: var(--card); border: 1px solid var(--border-hi);
  border-radius: 8px; padding: 28px;
  position: sticky; top: 92px;
}
.demo-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px;
}
.demo-tag {
  font-family: var(--font-mono); font-size: 11.5px;
  text-transform: uppercase; letter-spacing: .1em; color: var(--muted);
}
.demo-xp {
  font-family: var(--font-mono); font-size: 13px;
  color: var(--blue-light);
  border: 1px solid var(--border-hi); border-radius: 3px;
  padding: 4px 10px;
}
.demo-xp b { font-weight: 700; }
.demo-question {
  font-family: var(--font-display); font-size: 19px; font-weight: 500;
  line-height: 1.45; margin-bottom: 22px;
}
.demo-options { display: grid; gap: 10px; }
.demo-opt {
  display: flex; align-items: center; gap: 14px;
  background: transparent; color: var(--text);
  border: 1px solid var(--border-hi); border-radius: 5px;
  padding: 13px 16px; font: 500 15px var(--font-body);
  text-align: left; cursor: pointer;
  transition: border-color .2s, background .2s;
}
.demo-opt:hover { border-color: var(--blue-light); }
.demo-opt .opt-key {
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 700;
  color: var(--muted);
  border: 1px solid var(--border-hi); border-radius: 3px;
  width: 24px; height: 24px; display: inline-flex;
  align-items: center; justify-content: center; flex-shrink: 0;
}
.demo-opt.is-correct { border-color: var(--success); background: color-mix(in oklab, var(--success) 12%, transparent); }
.demo-opt.is-wrong { border-color: var(--ember); background: color-mix(in oklab, var(--ember) 10%, transparent); }
.demo-opt:disabled { cursor: default; opacity: .85; }
.demo-feedback {
  min-height: 48px; margin-top: 16px;
  font-size: 14.5px; color: var(--muted);
}
.demo-feedback b { color: var(--text); }
.demo-note {
  margin-top: 14px; padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 12.5px; color: var(--muted);
}

/* ---------- 04 sandbox ---------- */
.sandbox-cols {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px;
  align-items: start;
}
.funnel-card {
  background: var(--card); border: 1px solid var(--border-hi);
  border-radius: 8px; padding: 28px;
}
.funnel-card figcaption { margin-bottom: 22px; }
.funnel { display: grid; gap: 14px; }
.f-row {
  display: grid; grid-template-columns: 170px 1fr 76px;
  gap: 14px; align-items: center;
}
.f-label { font-size: 13.5px; color: var(--muted); }
.f-bar {
  height: 22px; background: oklch(1 0 0 / 4%);
  border-radius: 3px; overflow: hidden;
}
.f-bar i {
  display: block; height: 100%; width: 0;
  background: var(--blue-deep);
  transition: width 1.1s var(--ease);
}
.f-key .f-bar i { background: var(--blue); }
.f-key .f-label, .f-key .f-val { color: var(--text); font-weight: 600; }
.f-val { font-size: 14px; text-align: right; color: var(--muted); }
.funnel.is-on .f-row i { width: calc(var(--w) * 1%); }

/* ---------- 05 калькулятор ---------- */
.calc-panel {
  display: grid; grid-template-columns: 320px 1fr; gap: 56px;
  background: var(--card); border: 1px solid var(--border-hi);
  border-radius: 8px; padding: 40px;
}
.calc-inputs { display: grid; gap: 30px; align-content: start; }
.ctl { display: grid; gap: 10px; }
.ctl-name {
  font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: .09em; color: var(--muted);
}
.ctl-val { font-size: 20px; font-weight: 700; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue) var(--fill, 50%), oklch(1 0 0 / 12%) var(--fill, 50%));
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--text); border: 3px solid var(--blue);
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--text); border: 3px solid var(--blue);
}

.calc-compare { display: grid; gap: 26px; align-content: start; }
.cmp-row { display: grid; gap: 10px; }
.cmp-metric {
  font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: .09em; color: var(--muted);
}
.cmp-pair { display: grid; gap: 7px; }
.cmp-side { display: grid; grid-template-columns: 1fr 210px; gap: 16px; align-items: center; }
.cmp-bar {
  height: 20px; background: oklch(1 0 0 / 4%);
  border-radius: 3px; overflow: hidden;
}
.cmp-bar i {
  display: block; height: 100%; width: 50%;
  border-radius: 3px;
  transition: width .45s var(--ease);
}
.cmp-side.old .cmp-bar i { background: color-mix(in oklab, var(--ember) 78%, transparent); }
.cmp-side.new .cmp-bar i { background: var(--blue); }
.cmp-val { font-size: 13.5px; color: var(--text); }
.cmp-verdict {
  border-top: 1px solid var(--border); padding-top: 22px;
  font-size: 15.5px; color: var(--muted); max-width: 58ch;
}
.cmp-verdict b { color: var(--text); }
.cmp-legend { display: flex; gap: 22px; }
.lg {
  font-family: var(--font-mono); font-size: 11.5px;
  text-transform: uppercase; letter-spacing: .09em; color: var(--muted);
  display: inline-flex; align-items: center; gap: 8px;
}
.lg::before { content: ""; width: 14px; height: 8px; border-radius: 2px; }
.lg-old::before { background: color-mix(in oklab, var(--ember) 78%, transparent); }
.lg-new::before { background: var(--blue); }

/* ---------- 06 интеграция ---------- */
.proto-list { display: grid; gap: 0; }
.proto {
  display: grid; grid-template-columns: 88px 1fr; gap: 26px;
  padding: 30px 0; border-top: 1px solid var(--border);
}
.proto:last-child { border-bottom: 1px solid var(--border); }
.proto-num {
  font-family: var(--font-mono); font-size: 15px; font-weight: 700;
  color: var(--blue-light);
}
.proto h4 {
  font-family: var(--font-display); font-size: 21px; font-weight: 600;
  margin-bottom: 8px;
}
.proto p { font-size: 15.5px; color: var(--muted); max-width: 68ch; }
.proof {
  margin-top: 36px; padding: 22px 26px;
  border-left: 2px solid var(--blue);
  background: color-mix(in oklab, var(--blue-deep) 12%, transparent);
  border-radius: 0 6px 6px 0;
  font-size: 16px; max-width: 66ch;
}

/* ---------- 07 финмодель ---------- */
.fin-panel {
  background: var(--card); border: 1px solid var(--border-hi);
  border-radius: 8px; padding: 40px;
}
.ctl-wide { max-width: 460px; margin-bottom: 36px; }
.fin-bar {
  display: flex; height: 60px; border-radius: 6px; overflow: hidden;
  margin-bottom: 36px;
}
.fin-seg {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 700;
  letter-spacing: .05em; color: #fff;
  min-width: 0; white-space: nowrap;
}
.seg-bn { background: var(--blue-deep); }
.seg-br { background: var(--blue); }
.seg-in { background: color-mix(in oklab, var(--blue-light) 88%, #fff 0%); color: var(--bg); }

.fin-rows { display: grid; gap: 26px; }
.fin-row { display: grid; grid-template-columns: 26px 1fr; gap: 18px; }
.fin-dot {
  width: 14px; height: 14px; border-radius: 3px; margin-top: 6px;
}
.dot-bn { background: var(--blue-deep); }
.dot-br { background: var(--blue); }
.dot-in { background: var(--blue-light); }
.fin-info h4 {
  font-family: var(--font-body); font-size: 17px; font-weight: 600;
  margin-bottom: 6px;
}
.fin-info h4 .mono-num { color: var(--blue-light); }
.fin-info p { font-size: 15px; color: var(--muted); max-width: 74ch; }
.fin-info p .mono-num { color: var(--text); }
.fin-note {
  margin-top: 34px; padding-top: 22px;
  border-top: 1px solid var(--border);
  font-size: 13.5px; color: var(--muted); max-width: 70ch;
}

/* ---------- 08 масштаб ---------- */
.scale-cols {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px;
  align-items: start;
}
.eco-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--border); border: 1px solid var(--border);
  border-radius: 6px; overflow: hidden;
}
.eco { background: var(--bg); padding: 24px; }
.eco h4 {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .1em;
  color: var(--blue-light); margin-bottom: 10px;
}
.eco p { font-size: 14.5px; color: var(--muted); }

/* ---------- 09 контакт ---------- */
.sec-cta { padding-bottom: 130px; }
.contact-card {
  display: flex; justify-content: space-between; align-items: center;
  gap: 40px; flex-wrap: wrap;
  background: color-mix(in oklab, var(--blue-deep) 16%, var(--card));
  border: 1px solid color-mix(in oklab, var(--blue) 35%, transparent);
  border-radius: 8px; padding: 40px 44px;
}
.contact-name {
  font-family: var(--font-display); font-size: 26px; font-weight: 600;
}
.contact-role { color: var(--muted); font-size: 15px; margin-top: 4px; }

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}
.footer-row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 28px; flex-wrap: wrap;
}
.footer p { font-size: 13.5px; color: var(--muted); }

/* ---------- первая серия: галерея роликов ---------- */
.episodes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  max-width: 1000px;
}
.ep { min-width: 0; }
.ep-thumb {
  position: relative; display: block; width: 100%;
  aspect-ratio: 9 / 16;
  padding: 0; border: 1px solid var(--border-hi); border-radius: 8px;
  overflow: hidden; cursor: pointer;
  background: var(--card);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.ep-thumb img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.ep-thumb::after {
  /* лёгкое затемнение снизу под подпись */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, oklch(0.16 0.02 250 / 78%) 100%);
}
.ep-thumb:hover, .ep-thumb:focus-visible {
  border-color: var(--blue); transform: translateY(-3px);
}
.ep-play {
  position: absolute; top: 50%; left: 50%; z-index: 2;
  width: 60px; height: 60px; transform: translate(-50%, -50%);
  border-radius: 50%;
  background: color-mix(in oklab, var(--bg) 55%, transparent);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border-hi);
  transition: background .25s var(--ease), border-color .25s var(--ease);
}
.ep-play::before {
  content: ""; position: absolute; top: 50%; left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid; border-width: 9px 0 9px 15px;
  border-color: transparent transparent transparent var(--text);
}
.ep-thumb:hover .ep-play, .ep-thumb:focus-visible .ep-play {
  background: var(--blue); border-color: var(--blue-light);
}
.ep-cap {
  position: absolute; left: 12px; bottom: 11px; z-index: 2;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .02em;
  color: var(--text);
}

/* ---------- лайтбокс ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 32px;
}
.lightbox[hidden] { display: none; }
.lightbox-backdrop {
  position: absolute; inset: 0;
  background: oklch(0.11 0.02 250 / 82%);
  backdrop-filter: blur(6px);
  animation: lb-fade .2s var(--ease);
}
.lightbox-stage {
  position: relative; z-index: 1;
  max-width: min(440px, 92vw);
  animation: lb-pop .28s var(--ease);
}
.lightbox-video {
  display: block; width: 100%;
  max-height: 86vh; aspect-ratio: 9 / 16;
  background: #000;
  border: 1px solid var(--border-hi); border-radius: 10px;
  box-shadow: 0 30px 80px oklch(0 0 0 / 55%);
}
.lightbox-close {
  position: absolute; top: -14px; right: -14px; z-index: 2;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--card-hi); color: var(--text);
  border: 1px solid var(--border-hi);
  font-size: 24px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s var(--ease);
}
.lightbox-close:hover { background: var(--blue); }
@keyframes lb-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes lb-pop { from { opacity: 0; transform: scale(.96); } to { opacity: 1; transform: none; } }

/* ---------- reveal-анимации ---------- */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .1s; }
.reveal.d2 { transition-delay: .2s; }
.reveal.d3 { transition-delay: .3s; }
.reveal.d4 { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .f-bar i, .cmp-bar i { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .sol-cols, .sandbox-cols, .scale-cols { grid-template-columns: 1fr; gap: 48px; }
  .calc-panel { grid-template-columns: 1fr; gap: 40px; padding: 30px; }
  .demo-case { position: static; }
  .pain-grid { grid-template-columns: 1fr 1fr; }
  .episodes-grid { max-width: none; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 68px 0; }
  .hero { padding: 80px 0 70px; }
  .nav-links { display: none; }
  .hero-ledger { grid-template-columns: 1fr; }
  .ledger-old { border-right: none; border-bottom: 1px solid var(--border); }
  .stat-strip { grid-template-columns: 1fr; gap: 28px; }
  .crisis-list { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .eco-grid { grid-template-columns: 1fr; }
  .sec-head { flex-direction: column; gap: 14px; }
  .f-row { grid-template-columns: 110px 1fr 64px; gap: 10px; }
  .cmp-side { grid-template-columns: 1fr; gap: 6px; }
  .proto { grid-template-columns: 1fr; gap: 10px; padding: 24px 0; }
  .contact-card { padding: 28px; }
  .fin-seg span { transform: rotate(0); font-size: 10.5px; }
  .episodes-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .ep-play { width: 46px; height: 46px; }
  .ep-play::before { border-width: 7px 0 7px 11px; }
  .ep-cap { font-size: 10.5px; left: 8px; bottom: 8px; }
}