/* ============================================================
   IMS — styles
   Палитра: бумага + чернила + один сигнальный акцент (вермилион)
   Шрифты: Fraunces (display serif), Inter (текст), JetBrains Mono (метки)
   ============================================================ */

:root {
  --paper:      #F2EEE5;
  --paper-2:    #EAE5D8;
  --ink:        #16150F;
  --ink-soft:   #38362C;
  --muted:      #6E6A5C;
  --line:       #D8D2C2;
  --accent:     #E8431C;   /* сигнальный вермилион */
  --accent-ink: #B8330F;
  --cream:      #F7F4EC;

  --shell:   1180px;
  --gutter:  clamp(20px, 5vw, 64px);

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Inter", system-ui, -apple-system, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.02em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ol, ul { margin: 0; padding: 0; list-style: none; }

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

.skip-link {
  position: absolute; left: -999px; top: 8px;
  background: var(--ink); color: var(--paper);
  padding: 10px 16px; border-radius: 8px; z-index: 200;
}
.skip-link:focus { left: 16px; }

/* ---------- shared bits ---------- */
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 22px;
}

.section-head { max-width: 720px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-title {
  font-family: var(--serif);
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.025em;
}
.section-sub { margin-top: 22px; color: var(--muted); font-size: 18px; max-width: 56ch; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  font-family: var(--sans); font-size: 15px; font-weight: 500;
  padding: 14px 24px; border-radius: 100px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn--solid { background: var(--ink); color: var(--cream); }
.btn--solid:hover { background: var(--accent); transform: translateY(-2px); }
.btn--line { border-color: var(--ink); color: var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--cream); transform: translateY(-2px); }
.btn--ghost { padding: 10px 18px; border-color: var(--line); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--full { width: 100%; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 500; border-bottom: 1px solid var(--ink);
  padding-bottom: 3px; transition: gap .25s var(--ease), color .25s var(--ease);
}
.link-arrow:hover { gap: 16px; color: var(--accent); border-color: var(--accent); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.site-header.is-stuck { border-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); }
.brand__mark { display: grid; place-items: center; color: var(--ink); }
.brand__word { font-family: var(--serif); font-size: 24px; font-weight: 600; letter-spacing: -0.03em; }
.brand__dot { color: var(--accent); }

.nav { display: flex; gap: 32px; }
.nav a {
  font-size: 15px; color: var(--ink-soft); position: relative; padding: 4px 0;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1.5px; width: 0;
  background: var(--accent); transition: width .3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  border-radius: 10px; background: transparent; cursor: pointer;
  flex-direction: column; gap: 5px; align-items: center; justify-content: center;
}
.nav-toggle span { width: 18px; height: 1.6px; background: var(--ink); transition: transform .3s, opacity .3s; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.3px) rotate(-45deg); }

.mobile-nav[hidden] { display: none; }
.mobile-nav {
  display: flex; flex-direction: column; gap: 4px;
  padding: 8px var(--gutter) 24px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.mobile-nav a { font-family: var(--serif); font-size: 26px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav__cta { color: var(--accent); }

/* ============================================================
   HERO
   ============================================================ */
.hero { padding-top: clamp(48px, 9vw, 110px); padding-bottom: clamp(40px, 7vw, 84px); }
.hero__title {
  font-family: var(--serif);
  font-size: clamp(44px, 9vw, 116px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  margin: 6px 0 0;
}
.hero__title span { display: block; }
.hero__title em { font-style: italic; color: var(--accent); }

.hero__grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px;
  align-items: end; margin-top: clamp(36px, 5vw, 64px);
}
.hero__lead { font-size: clamp(17px, 1.7vw, 20px); color: var(--ink-soft); max-width: 52ch; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; justify-self: start; }

.hero__stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin: clamp(56px, 8vw, 96px) 0 0;
  padding-top: 36px; border-top: 1px solid var(--line);
}
.stat dt { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.stat dd { margin: 0; font-family: var(--serif); font-size: clamp(34px, 4.4vw, 52px); line-height: 1; letter-spacing: -0.03em; }
.stat .num { font-variant-numeric: tabular-nums; }

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee {
  border-block: 1px solid var(--ink);
  background: var(--ink); color: var(--cream);
  overflow: hidden; padding: 16px 0;
  margin: clamp(8px, 2vw, 24px) 0;
}
.marquee__track {
  display: inline-flex; align-items: center; gap: 28px;
  white-space: nowrap; will-change: transform;
  animation: scroll 38s linear infinite;
  font-family: var(--serif); font-size: clamp(20px, 2.6vw, 30px); font-style: italic;
}
.marquee__track .dot { color: var(--accent); font-style: normal; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ============================================================
   SERVICES
   ============================================================ */
.services { padding-block: clamp(72px, 11vw, 140px); }
.svc-list { border-top: 1px solid var(--line); }
.svc {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 32px; align-items: start;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .35s var(--ease);
}
.svc:hover { padding-left: 14px; }
.svc__no { font-family: var(--mono); font-size: 14px; color: var(--accent-ink); padding-top: 6px; }
.svc__body h3 { font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); letter-spacing: -0.02em; }
.svc__body p { margin-top: 12px; color: var(--muted); max-width: 60ch; }
.svc__tags { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 6px; }
.svc__tags li {
  font-family: var(--mono); font-size: 11px; letter-spacing: .04em;
  padding: 5px 11px; border: 1px solid var(--line); border-radius: 100px; color: var(--ink-soft);
}
.badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  background: var(--accent); color: #fff; padding: 3px 8px; border-radius: 6px;
  vertical-align: middle; margin-left: 8px;
}

/* ============================================================
   APPROACH (dark)
   ============================================================ */
.approach { background: var(--ink); color: var(--cream); padding-block: clamp(80px, 12vw, 150px); }
.section-head--light .section-title { color: var(--cream); }
.section-head--light .kicker { color: #FF7A57; }
.section-head--light .section-sub { color: #ABA593; }

.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.14);
}
.step { background: var(--ink); padding: 32px 28px 36px; }
.step__no { font-family: var(--mono); font-size: 13px; color: #FF7A57; }
.step h3 { font-family: var(--serif); font-size: 26px; margin: 18px 0 12px; }
.step p { color: #ABA593; font-size: 15.5px; }
.step__deliver { display: block; margin-top: 22px; font-family: var(--mono); font-size: 12.5px; color: var(--cream); }

/* ============================================================
   WORK
   ============================================================ */
.work { padding-block: clamp(72px, 11vw, 140px); }
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  display: flex; flex-direction: column;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.case:hover { transform: translateY(-6px); box-shadow: 0 24px 48px -28px rgba(22,21,15,.4); border-color: var(--ink); }
.case__meta { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 12px; color: var(--muted); margin-bottom: 22px; }
.case__tag { color: var(--accent-ink); }
.case__title { font-family: var(--serif); font-size: 23px; letter-spacing: -0.02em; }
.case__text { margin-top: 12px; color: var(--muted); font-size: 15.5px; flex: 1; }
.case__result { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); }
.case__num { display: block; font-family: var(--serif); font-size: 44px; line-height: 1; letter-spacing: -0.03em; color: var(--accent); }
.case__label { display: block; margin-top: 8px; font-size: 13.5px; color: var(--muted); }
.work__note { margin-top: 28px; font-family: var(--mono); font-size: 12.5px; color: var(--muted); }

/* ============================================================
   STUDIO
   ============================================================ */
.studio { padding-block: clamp(72px, 11vw, 140px); background: var(--paper-2); }
.studio__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 88px); align-items: start; }
.studio__lead .section-title { margin-bottom: 24px; }
.studio__lead p { color: var(--ink-soft); margin-bottom: 18px; max-width: 48ch; }
.studio__lead .link-arrow { margin-top: 14px; }

.principles { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.principles li { background: var(--paper-2); padding: 28px 24px; }
.principles__no { font-family: var(--mono); font-size: 12px; color: var(--accent-ink); }
.principles h3 { font-family: var(--serif); font-size: 21px; margin: 14px 0 8px; }
.principles p { color: var(--muted); font-size: 14.5px; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { padding-block: clamp(72px, 11vw, 140px); }
.contact__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(40px, 6vw, 80px); align-items: start; }
.contact__title { font-family: var(--serif); font-size: clamp(30px, 4.4vw, 50px); line-height: 1.05; letter-spacing: -0.025em; margin-top: 4px; }
.contact__direct { display: flex; flex-direction: column; gap: 8px; margin-top: 34px; font-family: var(--mono); font-size: 16px; }
.contact__direct a { width: fit-content; border-bottom: 1px solid var(--line); padding-bottom: 3px; transition: border-color .25s, color .25s; }
.contact__direct a:hover { color: var(--accent); border-color: var(--accent); }

.contact__form { display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { font-family: var(--mono); font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.field input, .field textarea {
  font-family: var(--sans); font-size: 16px; color: var(--ink);
  background: transparent; border: none; border-bottom: 1.5px solid var(--line);
  padding: 10px 0; transition: border-color .25s;
}
.field textarea { resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #A8A293; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.form-note { font-size: 13px; color: var(--muted); margin-top: 2px; }
.form-note.is-ok { color: var(--accent-ink); font-weight: 500; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--ink); color: var(--cream); padding-top: clamp(56px, 8vw, 88px); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 56px; }
.footer-brand .brand__word { font-family: var(--serif); font-size: 30px; color: var(--cream); }
.footer-brand p { color: #ABA593; margin-top: 16px; font-size: 15px; }
.footer-col h4 { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: #FF7A57; margin-bottom: 18px; font-weight: 500; }
.footer-col a { display: block; color: #D8D3C5; padding: 6px 0; font-size: 15px; transition: color .2s; }
.footer-col a:hover { color: var(--cream); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  padding: 22px var(--gutter); border-top: 1px solid rgba(255,255,255,.12);
  font-size: 13px; color: #8C8777; max-width: none;
}
.footer-bottom__made { font-family: var(--mono); }

/* ============================================================
   REVEAL animation
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal:nth-child(2) { transition-delay: .06s; }
.reveal:nth-child(3) { transition-delay: .12s; }
.reveal:nth-child(4) { transition-delay: .18s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero__grid { grid-template-columns: 1fr; gap: 28px; }
  .hero__stats { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .cases { grid-template-columns: 1fr; }
  .studio__grid { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .svc { grid-template-columns: 40px 1fr; }
  .svc__tags { grid-column: 2; }
}

@media (max-width: 540px) {
  body { font-size: 16px; }
  .hero__cta { width: 100%; }
  .hero__cta .btn { flex: 1; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .svc:hover { padding-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .marquee__track { animation: none; }
}