/* Лендинг IronMate. Все значения — из DESIGN.md, хардкода цветов нет. */

:root {
  --paper: #1b1d22;         --paper-rgb: 27, 29, 34;
  --paper-2: #23262d;       --paper-2-rgb: 35, 38, 45;
  --paper-3: #2c3038;       --paper-3-rgb: 44, 48, 56;
  --line: #353a44;          --line-rgb: 53, 58, 68;
  --ink: #eae6dc;           --ink-rgb: 234, 230, 220;
  --body: #c9c5bb;          --body-rgb: 201, 197, 187;
  --muted: #8f939c;         --muted-rgb: 143, 147, 156;
  --steel: #6f8fb0;         --steel-rgb: 111, 143, 176;
  --steel-deep: #5b7d9f;    --steel-deep-rgb: 91, 125, 159;
  --record: #d0665b;        --record-rgb: 208, 102, 91;
  --good: #5bb381;          --good-rgb: 91, 179, 129;

  --font-display: Unbounded, "Golos Text", system-ui, sans-serif;
  --font-text: "Golos Text", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", monospace;

  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --dur-fast: .18s; --dur-base: .32s; --dur-slow: .7s;

  --container: 1180px;
  --pad: clamp(20px, 5vw, 48px);
  --section-y: clamp(72px, 10vw, 128px);
  --radius: 4px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font: 400 1.0625rem/1.6 var(--font-text);
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-family: var(--font-display); color: var(--ink); }
p { margin: 0; }
img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--pad); }

.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: .82rem;
  letter-spacing: .24em; color: var(--ink); text-decoration: none;
}
.logo img { width: 28px; height: 28px; }
.logo--sm { font-size: .75rem; }

/* --- Кнопки --- */

.btn {
  --btn-bg: var(--steel);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 26px; min-height: 48px;
  font: 600 1rem/1 var(--font-text); color: #10151b; background: var(--btn-bg);
  border: 0; border-radius: 2px; text-decoration: none; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-fast), box-shadow var(--dur-fast);
}
.btn:hover { --btn-bg: #85a4c2; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(var(--steel-rgb), .25); }
.btn:active { --btn-bg: var(--steel-deep); transform: translateY(0); box-shadow: none; }
.btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.btn--ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
.btn--ghost:hover { background: rgba(var(--ink-rgb), .05); box-shadow: inset 0 0 0 1px var(--muted); transform: translateY(-2px); }
.btn--sm { padding: 10px 18px; min-height: 40px; font-size: .92rem; }
.btn--lg { padding: 18px 34px; font-size: 1.08rem; }

/* --- Навигация --- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: transparent; border-bottom: 1px solid transparent;
  transition: background-color var(--dur-base), border-color var(--dur-base);
}
.nav.is-stuck { background: rgba(var(--paper-rgb), .9); backdrop-filter: blur(12px); border-bottom-color: var(--line); }
.nav__inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.nav__links { display: flex; gap: 26px; margin-left: auto; }
.nav__links a { color: var(--muted); text-decoration: none; font-size: .95rem; transition: color var(--dur-fast); }
.nav__links a:hover, .nav__links a:focus-visible { color: var(--ink); }

/* --- Первый экран --- */

.hero { position: relative; padding: clamp(48px, 8vw, 96px) 0 clamp(64px, 9vw, 112px); overflow: hidden; }

/* Линованный лист — тетрадь для записи подходов, а не абстрактный узор. */
.hero__grid-bg {
  position: absolute; inset: -20% 0 auto 0; height: 140%;
  background-image: linear-gradient(rgba(var(--line-rgb), .7) 1px, transparent 1px);
  background-size: 100% 34px;
  mask-image: radial-gradient(120% 70% at 30% 20%, #000 0%, transparent 72%);
  transform: translateY(var(--parallax, 0));
  pointer-events: none;
}
.hero__glow {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 25%) var(--my, 30%), rgba(var(--steel-rgb), .10), transparent 65%);
  opacity: 0; transition: opacity var(--dur-slow);
}
.hero.is-live .hero__glow { opacity: 1; }

.hero__inner {
  position: relative; display: grid; gap: clamp(36px, 5vw, 64px);
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); align-items: center;
}

.hero__title {
  font-size: clamp(1.8rem, 1.05rem + 2.4vw, 2.95rem); font-weight: 700;
  line-height: 1.06; letter-spacing: -.03em; margin-bottom: 22px;
}
.hero__title .line { display: block; overflow: hidden; }
.hero__title .line > span { display: block; transform: translateY(105%); animation: riseIn .9s var(--ease-out) forwards; }
.hero__title .line:nth-child(2) > span { animation-delay: .12s; }
.hero__title .line:nth-child(3) > span { animation-delay: .24s; }
@keyframes riseIn { to { transform: translateY(0); } }

.hero__lead {
  max-width: 54ch; font-size: clamp(1.05rem, .98rem + .4vw, 1.25rem); line-height: 1.55;
  opacity: 0; animation: fadeUp .8s var(--ease-out) .3s forwards;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; opacity: 0; animation: fadeUp .8s var(--ease-out) .42s forwards; }
.hero__note { margin-top: 16px; color: var(--muted); font-size: .875rem; opacity: 0; animation: fadeUp .8s var(--ease-out) .54s forwards; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }

/* --- Диалог --- */

.hero__chat { opacity: 0; animation: fadeUp .9s var(--ease-out) .5s forwards; }
.chat {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45); overflow: hidden;
}
.chat__head { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.chat__avatar { width: 34px; height: 34px; border-radius: 50%; display: block; }
.chat__name { font-weight: 600; color: var(--ink); font-size: .95rem; }
.chat__name em { display: block; font-style: normal; font-size: .78rem; font-weight: 400; color: var(--good); }
.chat__body { display: flex; flex-direction: column; gap: 10px; padding: 18px; min-height: 340px; }

.bubble {
  max-width: 82%; padding: 12px 15px; border-radius: 4px 14px 14px 14px;
  background: var(--paper-3); color: var(--body); font-size: .97rem; line-height: 1.5;
  animation: bubbleIn .4s var(--ease-out) both;
}
.bubble--me { margin-left: auto; border-radius: 14px 4px 14px 14px; background: rgba(var(--steel-rgb), .12); color: var(--ink); }
.bubble--keys { display: flex; flex-wrap: wrap; gap: 6px; background: none; padding: 0; max-width: 100%; }
.bubble b { color: var(--ink); font-weight: 600; }
@keyframes bubbleIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.key {
  padding: 8px 13px; border: 1px solid var(--line); border-radius: 2px;
  background: var(--paper-2); color: var(--muted); font-size: .88rem;
}
.key--on { border-color: var(--steel); color: var(--ink); }

.typing { display: inline-flex; gap: 4px; padding: 14px 15px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .18s; }
.typing i:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 60%, 100% { opacity: .28; } 30% { opacity: 1; } }

/* --- Бегущая строка --- */

.marquee {
  border-block: 1px solid var(--line); background: var(--paper-2);
  overflow: hidden; padding: 18px 0; user-select: none;
}
.marquee__track { display: flex; gap: 48px; width: max-content; animation: slide 46s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span {
  font-family: var(--font-display); font-size: clamp(1rem, .9rem + .5vw, 1.35rem);
  color: var(--body); white-space: nowrap;
}
.marquee__track span::after { content: "·"; margin-left: 48px; color: var(--muted); }
@keyframes slide { to { transform: translateX(-50%); } }

/* --- Секции --- */

.section { padding: var(--section-y) 0; }
.section__title { font-size: clamp(1.7rem, 1.25rem + 1.8vw, 2.6rem); line-height: 1.1; letter-spacing: -.02em; max-width: 22ch; }
.section__lead { margin-top: 16px; max-width: 62ch; color: var(--muted); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.reveal.in-view { opacity: 1; transform: none; }

/* --- Шаги --- */

.steps { list-style: none; margin: clamp(36px, 5vw, 56px) 0 0; padding: 0; display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.step { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.step__num { font-family: var(--font-display); font-size: .78rem; letter-spacing: .12em; color: var(--steel); }
.step h3 { margin: 12px 0 10px; font-size: 1.15rem; }
.step p { color: var(--muted); font-size: .97rem; }
.step__demo { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.step__demo--calc { flex-direction: column; align-items: flex-start; gap: 6px; font-family: var(--font-display); font-size: 1.05rem; color: var(--muted); }
.step__demo--calc .accent { color: var(--ink); }
.arrow { color: var(--steel); }
.chip { padding: 7px 12px; border: 1px solid var(--line); border-radius: 2px; font-size: .85rem; color: var(--muted); background: var(--paper-2); }
.chip--on { border-color: var(--steel); color: var(--ink); background: rgba(var(--steel-rgb), .08); }

/* --- Bento --- */

.bento {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid; gap: 20px;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(0, auto);
}
.bento__a { grid-column: span 2; grid-row: span 2; display: flex; flex-direction: column; }
.bento__b { grid-column: span 2; }
.bento__c { grid-column: span 1; }
.bento__d { grid-column: span 1; }
.bento__e { grid-column: span 4; }

.card {
  position: relative; background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; overflow: hidden;
  transition: border-color var(--dur-base), transform var(--dur-base) var(--ease-out);
}
.card:hover { border-color: var(--steel); transform: translateY(-3px); }
.card:focus-within { border-color: var(--steel); }
.card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: .97rem; }

.spot::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(240px circle at var(--cx, 50%) var(--cy, 50%), rgba(var(--steel-rgb), .08), transparent 70%);
  transition: opacity var(--dur-base);
}
.spot:hover::before { opacity: 1; }

.mini-list { list-style: none; margin: 22px 0 0; padding: 0; }
.card__foot { margin-top: auto; padding-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.mini-list li { display: flex; justify-content: space-between; gap: 14px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .94rem; }
.mini-list li:last-child { border-bottom: 0; }
.mini-list b { color: var(--ink); font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; }

.food { margin-top: 20px; }
.food code {
  display: block; padding: 12px 14px; background: var(--paper-3); border-radius: 2px;
  color: var(--body); font-size: .9rem; font-family: var(--font-mono);
}
.food__out { margin-top: 12px; font-family: var(--font-display); font-size: 1.05rem; color: var(--muted); }
.food__out b { color: var(--steel); font-size: 1.5rem; }

.bars { display: flex; align-items: flex-end; gap: 7px; height: 76px; margin-top: 22px; }
.bars i { flex: 1; height: var(--h); background: rgba(var(--steel-rgb), .55); border-radius: 1px; }
.bars i:last-child { background: var(--steel); }

/* --- Карточка недели --- */

.section--split { border-top: 1px solid var(--line); }
.split { display: grid; gap: clamp(32px, 5vw, 64px); grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); align-items: center; }
.split__text p { margin-top: 16px; max-width: 52ch; color: var(--muted); }
.split__media img { border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 24px 60px rgba(0, 0, 0, .4); }

.stats { display: flex; flex-wrap: wrap; gap: 24px 48px; margin-top: 34px; }
.stats b { display: block; font-family: var(--font-display); font-size: clamp(2rem, 1.4rem + 2.4vw, 3.4rem); font-weight: 700; color: var(--ink); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stats span { color: var(--muted); font-size: .875rem; }

/* --- Тарифы --- */

.plans { margin-top: clamp(36px, 5vw, 56px); display: grid; gap: 20px; grid-template-columns: repeat(2, 1fr); }
.plan { display: flex; flex-direction: column; }
.plan--pro { border-color: var(--steel); }
.plan__name { font-size: 1rem; letter-spacing: .1em; }
.plan__price { margin-top: 10px; font-family: var(--font-display); font-size: 2.2rem; font-weight: 700; color: var(--ink); }
.plan__price span { display: block; margin-top: 6px; font-family: var(--font-text); font-size: .875rem; font-weight: 400; color: var(--muted); }
.plan__list { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 11px; }
.plan__list li { position: relative; padding-left: 24px; font-size: .97rem; }
.plan__list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 10px; height: 2px; background: var(--steel); }
.plan__btn { margin-top: 28px; align-self: flex-start; }

/* --- FAQ --- */

.faq-wrap { display: grid; gap: clamp(28px, 4vw, 48px); grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); align-items: start; }
.faq { display: grid; gap: 2px; }
.faq details { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); }
.faq summary {
  padding: 20px 24px; cursor: pointer; list-style: none; color: var(--ink);
  font-family: var(--font-display); font-size: 1.02rem; transition: color var(--dur-fast);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--steel); font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq summary:hover { color: var(--steel); }
.faq summary:focus-visible { outline: 2px solid var(--steel); outline-offset: -2px; }
.faq p { padding: 0 24px 22px; color: var(--muted); font-size: .97rem; max-width: 62ch; }

/* --- Финальный экран --- */

.cta { padding: var(--section-y) 0; background: var(--paper-2); border-top: 1px solid var(--line); }
.cta__inner { text-align: center; }
.cta h2 { color: var(--ink); font-size: clamp(1.9rem, 1.4rem + 2.2vw, 3rem); letter-spacing: -.02em; }
.cta p { margin: 16px auto 32px; max-width: 46ch; color: var(--muted); }

/* --- Подвал --- */

.foot { border-top: 1px solid var(--line); padding: 36px 0 56px; }
.foot__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; }
.foot__note { color: var(--muted); font-size: .82rem; }
.foot__egg { margin-left: auto; color: var(--muted); font-size: .82rem; opacity: 0; transform: translateY(6px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.foot__egg.in-view { opacity: 1; transform: none; color: var(--steel); }

/* --- Адаптив --- */

@media (max-width: 1023px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__chat { max-width: 460px; }
  .steps { grid-template-columns: 1fr; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento__a, .bento__b, .bento__e { grid-column: span 2; }
  .bento__a { grid-row: auto; display: block; }
  .split { grid-template-columns: 1fr; }
  .split__media { max-width: 420px; }
  .faq-wrap { grid-template-columns: 1fr; }
  .nav__links { display: none; }
}

@media (max-width: 767px) {
  .plans { grid-template-columns: 1fr; }
  .marquee__track { animation-duration: 28s; }
  .hero__grid-bg { transform: none !important; }
  .stats { gap: 24px; }
  .card, .step { padding: 22px; }
}

@media (max-width: 380px) {
  .hero__title { font-size: 1.75rem; }
  :root { --section-y: 56px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important; scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero__title .line > span { transform: none; }
  .hero__lead, .hero__cta, .hero__note, .hero__chat { opacity: 1; }
}