/* ============================================================
   ИИ Коллектив — лендинг вебинара
   Дизайн-токены — см. README «Design tokens», перенесены 1:1
   ============================================================ */

:root {
  --bg: oklch(0.13 0.003 260);
  --card: oklch(0.19 0.006 260);
  --border: oklch(0.28 0.006 260);
  --text: oklch(0.96 0.004 260);
  --muted: #9b9b9b;
  --muted-2: #767676;
  --accent: oklch(0.55 0.22 25);
  --on-accent: oklch(0.99 0.003 25);
  --container: 1280px;
  --pad-x: 56px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 300;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #fff; }

@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.cursor-blink { animation: blink 1s step-start infinite; }

/* --- Кнопки ------------------------------------------------ */

.btn {
  font-family: inherit;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: 2px;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.1); }
.btn:disabled { opacity: 0.6; cursor: default; }

.btn--header { font-size: 14px; padding: 14px 24px; }
.btn--hero { font-size: 16px; padding: 18px 34px; }
.btn--submit { font-size: 15px; padding: 16px; margin-top: 6px; }

/* --- Лого --------------------------------------------------- */

.brand { display: flex; align-items: center; gap: 12px; }
.brand--footer { gap: 10px; }

.brand__mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  background: var(--accent);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13px;
  color: var(--on-accent);
}
.brand__mark--small { width: 26px; height: 26px; font-size: 10px; }

.brand__name {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
  text-transform: uppercase;
}
.brand__name--small { font-size: 14px; letter-spacing: normal; }

/* --- Хедер -------------------------------------------------- */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px var(--pad-x);
  max-width: var(--container);
  margin: 0 auto;
}

/* --- Хиро --------------------------------------------------- */

.hero {
  padding: 40px var(--pad-x) 80px;
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero__kicker {
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero__title {
  font-weight: 400;
  font-size: 44px;
  line-height: 1.15;
  margin: 0 0 22px;
  text-wrap: pretty;
}
.hero__title-line { color: var(--text); }
.hero__title-line--accent { color: var(--accent); }

.hero__lead { max-width: 520px; margin: 0 0 32px; }
.hero__lead-title {
  font-weight: 800;
  font-size: 18px;
  color: var(--accent);
  margin-bottom: 8px;
}
.hero__lead-text {
  font-size: 16px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
}

/* --- Диаграмма «как работает ИИ» ---------------------------- */

.hero__diagram {
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
  padding: 32px;
}

.diagram__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.diagram__step { display: flex; align-items: center; gap: 16px; }
.diagram__step--highlight {
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 12px;
  margin: 0 -12px;
}

.diagram__icon {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text);
}
.diagram__icon--accent { border-color: var(--accent); color: var(--accent); }

.diagram__step-title { font-weight: 700; font-size: 16px; color: var(--text); }
.diagram__step-sub { font-size: 13px; color: var(--muted); }

.diagram__arrow {
  padding: 2px 0 2px 21px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
}

.diagram__swap {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-around;
}
.diagram__swap-arrow { font-size: 22px; color: var(--muted); }

.diagram__figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.diagram__figure-label {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.diagram__figure-label--struck { text-decoration: line-through; }
.diagram__figure-label--accent { color: var(--accent); font-weight: 800; }

/* Иконка «сотрудник»: перечёркнутый человечек из CSS-фигур */
.icon-human { position: relative; width: 64px; height: 64px; }
.icon-human__head {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 3px solid var(--muted);
}
.icon-human__body {
  position: absolute; bottom: 8px; left: 50%; transform: translateX(-50%);
  width: 40px; height: 22px;
  border-radius: 20px 20px 0 0;
  border: 3px solid var(--muted);
  border-bottom: none;
}
.icon-human__ring {
  position: absolute; top: 2px; left: 2px;
  width: 60px; height: 60px;
  border-radius: 50%;
  border: 3px solid var(--accent);
}
.icon-human__slash {
  position: absolute; top: 31px; left: 2px;
  width: 60px; height: 3px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* Иконка «ИИ»: робот из CSS-фигур */
.icon-robot { position: relative; width: 64px; height: 64px; }
.icon-robot__antenna-tip {
  position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
.icon-robot__antenna {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  width: 2px; height: 8px;
  background: var(--accent);
}
.icon-robot__head {
  position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 30px; height: 22px;
  border: 3px solid var(--accent);
  border-radius: 5px;
  display: flex; align-items: center; justify-content: center; gap: 5px;
}
.icon-robot__eye { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.icon-robot__body {
  position: absolute; top: 44px; left: 50%; transform: translateX(-50%);
  width: 36px; height: 18px;
  border: 3px solid var(--accent);
  border-radius: 4px;
}

/* --- Общие секции ------------------------------------------- */

.section {
  padding: 0 var(--pad-x) 80px;
  max-width: var(--container);
  margin: 0 auto;
}
.section--cases { padding-top: 80px; }

.section__title {
  font-weight: 800;
  font-size: 30px;
  color: var(--text);
  margin: 0 0 28px;
}
.section__title--faq { margin-bottom: 20px; }

/* --- Траст-блок --------------------------------------------- */

.trust-card {
  background: var(--card);
  border-radius: 4px;
  padding: 36px 40px;
}
.trust-card__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.trust-card__text {
  font-size: 16px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
  max-width: 760px;
}

/* --- Что покажем -------------------------------------------- */

.show-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.show-card {
  background: var(--card);
  border-radius: 4px;
  padding: 28px;
  border-left: 3px solid var(--accent);
}
.show-card__lead {
  font-weight: 700;
  font-size: 15px;
  color: var(--accent);
  margin-bottom: 10px;
}
.show-card__text {
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
  line-height: 1.3;
}

/* --- ТЭО: парные показатели --------------------------------- */

.teo { padding: 0 0 80px; }
.teo__title {
  margin: 0 auto 28px;
  padding: 0 var(--pad-x);
  max-width: var(--container);
}
.teo__rows {
  display: flex;
  flex-direction: column;
  max-width: var(--container);
  margin: 0 auto;
}
.teo__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
}
.teo__cell {
  padding: 28px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.teo__cell--us { background: var(--card); }
.teo__who { font-size: 14px; color: var(--muted); }
.teo__value { font-weight: 800; font-size: 36px; color: var(--muted-2); }
.teo__value--accent { color: var(--accent); }

/* --- Кейсы --------------------------------------------------- */

.cases { display: flex; flex-direction: column; gap: 16px; }

.case-card {
  background: var(--card);
  border-radius: 4px;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 24px;
  align-items: center;
}
.case-card__label {
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}
.case-card__text {
  font-size: 16px;
  line-height: 1.5;
  color: var(--muted);
  margin: 0;
}
.case-card__effect { text-align: right; }
.case-card__sum {
  font-weight: 800;
  font-size: 29px;
  color: var(--text);
  margin-bottom: 6px;
}
.case-card__note { font-size: 14px; color: var(--muted); }

/* --- Сделано в России ---------------------------------------- */

.made-in-ru {
  background: var(--card);
  border-radius: 8px;
  padding: 44px 48px;
  display: flex;
  align-items: center;
  gap: 40px;
  border-left: 4px solid var(--accent);
}
.made-in-ru__flag { font-size: 40px; }
.made-in-ru__title {
  font-weight: 800;
  font-size: 23px;
  color: var(--text);
  margin: 0 0 8px;
}
.made-in-ru__text {
  font-size: 16px;
  line-height: 1.5;
  color: var(--muted);
  margin: 0;
  max-width: 640px;
}

/* --- FAQ + регистрация ---------------------------------------- */

.faq-register {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.faq { display: flex; flex-direction: column; gap: 12px; }

.faq__item {
  background: var(--card);
  border-radius: 4px;
  padding: 20px 24px;
}
.faq__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 0;
  background: none;
  border: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}
.faq__toggle { color: var(--accent); font-size: 20px; flex: 0 0 auto; }
.faq__answer {
  font-size: 15px;
  line-height: 1.5;
  color: var(--muted);
  margin: 12px 0 0;
}

.register {
  background: var(--card);
  border-radius: 8px;
  padding: 40px;
  position: sticky;
  top: 24px;
}
.register__title {
  font-weight: 800;
  font-size: 23px;
  color: var(--text);
  margin: 0 0 8px;
}
.register__sub {
  font-size: 15px;
  color: var(--muted);
  margin: 0 0 24px;
}
.register__form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.register__input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px 16px;
  color: var(--text);
  font-size: 15px;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
}
.register__input:focus { border-color: var(--accent); }
.register__input--invalid { border-color: var(--accent); }
.register__hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.register__status { font-size: 14px; margin: 0; color: var(--muted); }
.register__status--error { color: var(--accent); }
.register__status--success { color: var(--text); font-weight: 700; }

/* --- Футер ---------------------------------------------------- */

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 32px var(--pad-x);
  border-top: 1px solid var(--border);
  max-width: var(--container);
  margin: 0 auto;
}
.footer__copy { font-size: 13px; color: var(--muted); }
.footer__link { font-size: 13px; color: var(--muted); text-decoration: underline; }

/* --- Адаптив --------------------------------------------------
   Референс — десктопный; брейкпоинты добавлены для продакшена,
   на ≥1024px вёрстка соответствует референсу 1:1. */

@media (max-width: 1023px) {
  :root { --pad-x: 32px; }
  .hero { grid-template-columns: 1fr; }
  .faq-register { grid-template-columns: 1fr; }
  .register { position: static; }
}

@media (max-width: 720px) {
  :root { --pad-x: 20px; }
  .header { padding-top: 20px; padding-bottom: 20px; }
  .btn--header { font-size: 12px; padding: 12px 16px; }
  .hero { padding-top: 16px; padding-bottom: 56px; gap: 36px; }
  .hero__title { font-size: 32px; }
  .section { padding-bottom: 56px; }
  .section--cases { padding-top: 56px; }
  .section__title { font-size: 24px; }
  .show-grid { grid-template-columns: 1fr; }
  .teo { padding-bottom: 56px; }
  .teo__cell { padding: 20px var(--pad-x); }
  .teo__value { font-size: 28px; }
  .case-card { grid-template-columns: 1fr; }
  .case-card__effect { text-align: left; }
  .made-in-ru { flex-direction: column; align-items: flex-start; gap: 20px; padding: 32px; }
  .register { padding: 28px 24px; }
  .footer { flex-wrap: wrap; }
}