:root {
  --font: Onest, system-ui, sans-serif;
  --paper: #efeee9;
  --ink: #121211;
  --muted: #6d6c67;
  --line: rgba(18, 18, 17, .16);
  --accent: #131cf4;
  --signal: #131cf4;
  --pad: clamp(16px, 3vw, 40px);
  --gap: clamp(12px, 1.6vw, 24px);
  --ease: cubic-bezier(.2, .7, .1, 1);
  --header: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: var(--header); }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 500; }
::selection { background: var(--signal); color: #fff; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--pad); top: 8px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 12px; }

.label { font-size: 13px; line-height: 1.3; color: var(--muted); font-weight: 400; }
.muted { color: var(--muted); }
.plain { list-style: none; margin: 0; padding: 0; }
sup { font-size: .32em; vertical-align: top; position: relative; top: .35em; margin-left: .15em; color: var(--muted); font-weight: 400; }

/* ---------- кнопки ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 18px; border-radius: 40px; border: 0;
  font: 500 15px/1 var(--font); cursor: pointer;
  transition: transform .3s var(--ease), background .3s;
}
.btn--accent { background: var(--signal); color: #fff; }
.btn--accent:hover { background: var(--ink); }
.btn--big { height: 56px; padding: 0 32px; font-size: 17px; }
.btn:active { transform: scale(.97); }

/* ---------- шапка ---------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50; height: var(--header);
  display: flex; align-items: center; gap: 32px; padding: 0 var(--pad);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent; transition: border-color .3s, transform .4s var(--ease);
}
.site-header.is-scrolled { border-color: var(--line); }
.site-header.is-hidden { transform: translateY(-100%); }
.logo { display: inline-flex; align-items: center; font-weight: 600; font-size: 18px; letter-spacing: -.02em; white-space: nowrap; }
.logo__dash { display: inline-block; width: 22px; height: 2px; background: currentColor; margin: 0 5px; transition: width .5s var(--ease); }
.logo:hover .logo__dash { width: 56px; }
.logo__word { font-weight: 400; margin-left: 10px; color: var(--muted); }
.nav { display: flex; gap: 28px; margin-left: auto; font-size: 15px; }
.nav a { position: relative; transition: color .3s; }
.nav a:hover { color: var(--signal); }
.nav a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: -3px; height: 1.5px; background: currentColor;
  transition: right .4s var(--ease);
}
.nav a:hover::after, .nav a[aria-current]::after { right: 0; }
.burger { display: none; }

/* ---------- знак KB——12 ---------- */
.mark { display: flex; align-items: center; width: 100%; line-height: .8; letter-spacing: -.05em; font-weight: 500; }
.mark__line { flex: 1; position: relative; height: .065em; margin: 0 .12em; }
.mark__dash {
  display: block; width: 100%; height: 100%; background: currentColor;
  transform-origin: left; transform: scaleX(var(--dash, 1));
}
.mark__word {
  position: absolute; right: 0; bottom: 100%; margin-bottom: .16em;
  font-size: .13em; line-height: 1; letter-spacing: -.01em; font-weight: 400; white-space: nowrap;
  color: var(--muted);
}
.mark--footer .mark__word { color: #8a8984; }
.mark__12 { letter-spacing: -.07em; padding-right: .05em; }

/* ---------- hero ---------- */
.hero {
  min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end;
  padding: calc(var(--header) + 40px) var(--pad) clamp(28px, 5vw, 64px);
}
.mark--hero { font-size: clamp(96px, 23vw, 400px); margin-left: -.04em; }
.hero__row {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap);
  margin-top: clamp(24px, 4vw, 56px); padding-top: 20px; border-top: 1px solid var(--line); align-items: start;
}
.hero__label { grid-column: 1 / span 4; font-size: 13px; color: var(--muted); }
.hero__claim {
  grid-column: 5 / -1; font-size: clamp(36px, 6.4vw, 108px); line-height: .95; letter-spacing: -.045em; font-weight: 500;
}
.hero__claim em { font-style: normal; color: var(--signal); }
.hero__claim:hover { color: var(--signal); }

/* ---------- секции ---------- */
.section { padding: clamp(64px, 10vw, 160px) var(--pad) 0; }
.section--flush { padding-top: 0; }
.section-head {
  display: flex; justify-content: space-between; align-items: baseline;
  padding-top: 16px; border-top: 1px solid var(--ink); margin-bottom: clamp(24px, 4vw, 56px);
}
.section-title { font-size: clamp(40px, 7vw, 112px); line-height: .9; letter-spacing: -.05em; }
.link-arrow { font-size: 15px; }
.link-arrow span { display: inline-block; transition: transform .4s var(--ease); }
.link-arrow:hover span { transform: translateX(6px); }

.page-head { padding: calc(var(--header) + clamp(48px, 10vw, 140px)) var(--pad) clamp(32px, 5vw, 64px); }
.page-title { font-size: clamp(64px, 16vw, 260px); line-height: .82; letter-spacing: -.06em; }

/* ---------- карточки кейсов ---------- */
.grid-cases {
  display: grid; grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gap); row-gap: clamp(40px, 6vw, 88px);
}
.card { grid-column: span var(--span); display: block; }
.card__media { overflow: hidden; background: var(--accent); aspect-ratio: 16 / 10; }
.card[style*="--span:12"] .card__media { aspect-ratio: 21 / 9; }
.card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.1s var(--ease), opacity .6s;
}
.card:hover .card__media img { transform: scale(1.04); }
.card__meta {
  display: grid; grid-template-columns: 1fr auto; gap: 2px 16px; padding-top: 14px;
}
.card__title {
  display: flex; align-items: center; font-size: clamp(22px, 2.2vw, 32px); letter-spacing: -.03em; line-height: 1.1;
}
.card__dash {
  display: inline-block; width: 0; height: 2px; background: currentColor; margin-right: 0;
  transition: width .5s var(--ease), margin .5s var(--ease);
}
.card:hover .card__dash { width: .9em; margin-right: .3em; }
.card__kind { grid-row: 2; font-size: 13px; color: var(--muted); }
.card__client { grid-column: 2; grid-row: 1; font-size: 13px; color: var(--muted); align-self: center; }

/* ---------- о нас ---------- */
.section--about { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap); }
.section--about .label { grid-column: 1 / span 3; padding-top: .6em; }
.statement {
  grid-column: 4 / -1; font-size: clamp(26px, 3.6vw, 56px); line-height: 1.08; letter-spacing: -.035em; font-weight: 500;
  text-wrap: pretty;
}

/* ---------- услуги ---------- */
.services { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.service {
  position: relative; display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap);
  padding: clamp(20px, 2.6vw, 36px) 0; border-bottom: 1px solid var(--line); isolation: isolate;
}
.service::before {
  content: ''; position: absolute; inset: 0 calc(var(--pad) * -1); z-index: -1; background: var(--signal);
  transform: scaleY(0); transform-origin: bottom; transition: transform .5s var(--ease);
}
.service:hover::before { transform: scaleY(1); }
.service:hover, .service:hover .service__n, .service:hover .service__text { color: #fff; }
.service__n { grid-column: span 1; font-size: 13px; color: var(--muted); padding-top: .7em; transition: color .3s; }
.service__title { grid-column: 2 / span 6; font-size: clamp(26px, 3.4vw, 52px); line-height: 1; letter-spacing: -.04em; }
.service__text { grid-column: 9 / -1; color: var(--muted); font-size: 15px; transition: color .3s; }

/* ---------- клиенты ---------- */
.clients {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.clients li {
  display: grid; place-items: center; aspect-ratio: 16 / 9; padding: 14% 18%;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.clients img {
  max-height: 64px; width: auto; object-fit: contain; filter: grayscale(1) brightness(.55) contrast(1.4);
  mix-blend-mode: multiply; opacity: .75; transition: opacity .3s, transform .5s var(--ease);
}
.clients li:hover img { opacity: 1; transform: scale(1.06); }

/* ---------- бриф ---------- */
.brief {
  margin-top: clamp(80px, 12vw, 200px); background: var(--ink); color: var(--paper);
  padding: clamp(56px, 8vw, 120px) var(--pad);
  display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(40px, 5vw, 64px) var(--gap);
}
.brief .label { color: #9b9a94; }
.brief__intro { grid-column: 1 / span 5; scroll-margin-top: calc(var(--header) + 40px); }
.brief__title { font-size: clamp(36px, 4.6vw, 72px); line-height: .98; letter-spacing: -.045em; margin: 14px 0 24px; }
.brief__mail { color: #9b9a94; }
.brief__mail a { color: var(--paper); border-bottom: 1px solid currentColor; }
.brief__mail a:hover { color: var(--signal); }
.form { grid-column: 7 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 28px var(--gap); align-content: start; }
.field { display: grid; gap: 6px; }
.field--wide { grid-column: 1 / -1; }
.field span { font-size: 13px; color: #9b9a94; }
.field input, .field textarea {
  width: 100%; background: transparent; color: var(--paper); border: 0; border-bottom: 1px solid #45443f;
  padding: 8px 0 10px; font: 400 18px/1.4 var(--font); border-radius: 0; resize: vertical;
  transition: border-color .3s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--signal); }
.field textarea::placeholder { color: #5f5e59; }
.field.is-invalid input { border-color: var(--signal); }
.form__foot { grid-column: 1 / -1; display: flex; gap: 24px; align-items: center; justify-content: space-between; }
.form__note { font-size: 13px; color: #9b9a94; max-width: 34ch; }
.form__note a { border-bottom: 1px solid currentColor; }
.form__status { grid-column: 1 / -1; font-size: 15px; min-height: 1.5em; }

/* ---------- футер ---------- */
.site-footer { background: var(--ink); color: var(--paper); padding: 0 var(--pad) 24px; }
.footer-mark { border-top: 1px solid #2f2e2b; padding-top: clamp(40px, 6vw, 80px); }
.mark--footer { font-size: clamp(64px, 14vw, 240px); color: var(--paper); }
.footer-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap);
  padding: clamp(32px, 5vw, 64px) 0; font-size: 15px;
}
.site-footer .label { color: #8a8984; margin-bottom: 8px; }
.site-footer a:hover { color: var(--signal); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 20px; border-top: 1px solid #2f2e2b; font-size: 13px; color: #8a8984;
}

/* ---------- кейс ---------- */
.case-head { padding: calc(var(--header) + clamp(32px, 6vw, 96px)) var(--pad) clamp(24px, 4vw, 48px); }
.link-back { font-size: 15px; color: var(--muted); display: inline-flex; gap: 8px; }
.link-back span { transition: transform .4s var(--ease); }
.link-back:hover { color: var(--ink); }
.link-back:hover span { transform: translateX(-4px); }
.case-title {
  font-size: clamp(56px, 13vw, 220px); line-height: .85; letter-spacing: -.06em; margin: clamp(20px, 3vw, 40px) 0 clamp(24px, 4vw, 48px);
  text-wrap: balance;
}
.case-meta { display: flex; gap: clamp(24px, 6vw, 96px); margin: 0; padding-top: 16px; border-top: 1px solid var(--line); }
.case-meta dt { font-size: 13px; color: var(--muted); }
.case-meta dd { margin: 2px 0 0; }
.case-cover { padding: 0 var(--pad); }
.case-cover img { width: 100%; }
.case-intro {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap);
  padding: clamp(48px, 8vw, 120px) var(--pad);
}
.case-lead {
  grid-column: 1 / span 6; font-size: clamp(28px, 3.4vw, 52px); line-height: 1.04; letter-spacing: -.04em; font-weight: 500;
  text-wrap: balance;
}
.case-intro__text { grid-column: 8 / -1; display: grid; gap: 1em; }
.case-intro__text .label, .case-text .label { margin-bottom: -.4em; }
.gallery { display: grid; gap: var(--gap); padding: 0 var(--pad); }
.g-row img { width: 100%; }
.g-row--pair { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); align-items: start; }
.case-text {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap);
  padding: clamp(40px, 7vw, 112px) 0;
}
.case-text__body { grid-column: 5 / span 7; display: grid; gap: 1em; font-size: clamp(17px, 1.35vw, 20px); }
.dash-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .4em; }
.dash-list li { position: relative; padding-left: 1.6em; }
.dash-list li::before { content: ''; position: absolute; left: 0; top: .78em; width: 1em; height: 1.5px; background: currentColor; }
.case-stat {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap); align-items: end;
  padding: clamp(40px, 7vw, 112px) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  margin: clamp(24px, 4vw, 56px) 0;
}
.case-stat__n { grid-column: 1 / span 7; font-size: clamp(120px, 26vw, 420px); line-height: .78; letter-spacing: -.07em; font-weight: 500; color: var(--accent); }
.case-stat p { grid-column: 9 / -1; font-size: clamp(20px, 2vw, 28px); line-height: 1.15; letter-spacing: -.02em; }
.case-team { padding: clamp(56px, 8vw, 120px) var(--pad) 0; display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gap); }
.case-team .label { grid-column: 1 / span 4; }
.case-team ul { grid-column: 5 / -1; list-style: none; margin: 0; padding: 0; }
.case-team li { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--line); }
.case-team li:first-child { border-top: 1px solid var(--line); }

.next-case {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px var(--gap); align-items: end;
  margin-top: clamp(80px, 12vw, 200px); padding: clamp(32px, 4vw, 56px) var(--pad);
  border-top: 1px solid var(--ink); position: relative; overflow: hidden;
}
.next-case .label { grid-column: 1 / -1; }
.next-case__title {
  grid-column: 1 / span 8; display: flex; align-items: center;
  font-size: clamp(48px, 9vw, 160px); line-height: .9; letter-spacing: -.055em; font-weight: 500;
}
.next-case__dash { display: inline-block; flex: 0 0 auto; width: .4em; height: .06em; background: currentColor; margin-left: .2em; transition: width .7s var(--ease); }
.next-case:hover .next-case__dash { width: 1.6em; }
.next-case__img { grid-column: 9 / -1; overflow: hidden; aspect-ratio: 16 / 10; background: var(--accent); }
.next-case__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease); }
.next-case:hover .next-case__img img { transform: scale(1.05); }

/* ---------- появление ---------- */
.js .reveal { opacity: 0; transform: translateY(32px); transition: opacity .9s var(--ease), transform 1.1s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
.js .mark--hero .mark__dash { --dash: 0; transition: transform 1.4s var(--ease) .15s; }
.js.is-loaded .mark--hero .mark__dash { --dash: 1; }
.js .hero__claim, .js .hero__label { opacity: 0; transform: translateY(20px); transition: opacity .9s var(--ease) .7s, transform 1s var(--ease) .7s, color .4s; }
.js .mark--hero .mark__word { opacity: 0; transition: opacity .8s var(--ease) 1.2s; }
.js.is-loaded .mark--hero .mark__word { opacity: 1; }
.js.is-loaded .hero__claim, .js.is-loaded .hero__label { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; transition-delay: 0s !important; }
  .js .reveal, .js .hero__claim, .js .hero__label { opacity: 1; transform: none; }
  .js .mark--hero .mark__dash { --dash: 1; }
  .js .mark--hero .mark__word { opacity: 1; }
}

/* ---------- адаптив ---------- */
@media (max-width: 1000px) {
  .card { grid-column: span 6; }
  .card[style*="--span:12"] { grid-column: span 12; }
  .service__title { grid-column: 2 / -1; }
  .service__text { grid-column: 2 / -1; }
  .clients { grid-template-columns: repeat(3, 1fr); }
  .brief__intro, .form { grid-column: 1 / -1; }
  .case-lead, .case-intro__text { grid-column: 1 / -1; }
  .case-text__body { grid-column: 3 / -1; }
}

@media (max-width: 760px) {
  :root { --header: 56px; }
  body { font-size: 16px; }
  .logo__word { display: none; }
  .header-cta { margin-left: auto; height: 36px; padding: 0 14px; font-size: 14px; }
  .burger {
    display: grid; gap: 6px; width: 36px; height: 36px; place-content: center; padding: 0;
    background: none; border: 0; cursor: pointer; color: inherit;
  }
  .burger span { width: 22px; height: 2px; background: currentColor; transition: transform .4s var(--ease); }
  .burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav {
    position: fixed; inset: var(--header) 0 auto; flex-direction: column; gap: 0; margin: 0;
    background: var(--paper); padding: 8px var(--pad) 24px; border-bottom: 1px solid var(--line);
    font-size: 32px; letter-spacing: -.03em; font-weight: 500;
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: .35s var(--ease);
  }
  .nav a { padding: 8px 0; }
  .nav a::after { display: none; }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }

  .hero { min-height: 72svh; }
  .hero__row { grid-template-columns: 1fr; gap: 16px; }
  .hero__label, .hero__claim { grid-column: 1; }
  .card, .card[style*="--span:12"] { grid-column: span 12; }
  .card[style*="--span:12"] .card__media { aspect-ratio: 16 / 10; }
  .section--about { grid-template-columns: 1fr; }
  .section--about .label, .statement { grid-column: 1; }
  .service { grid-template-columns: 40px 1fr; gap: 8px 0; }
  .service__n { grid-column: 1; grid-row: 1 / span 2; padding-top: .45em; }
  .service__title, .service__text { grid-column: 2; }
  .clients { grid-template-columns: repeat(2, 1fr); }
  .form { grid-template-columns: 1fr; }
  .form__foot { flex-direction: column; align-items: stretch; }
  .footer-grid { grid-template-columns: 1fr 1fr; row-gap: 28px; }
  .case-text__body, .case-team ul, .case-team .label { grid-column: 1 / -1; }
  .case-stat__n, .case-stat p { grid-column: 1 / -1; }
  .g-row--pair { grid-template-columns: 1fr; }
  .next-case__title, .next-case__img { grid-column: 1 / -1; }
}

.nw { white-space: nowrap; }
.clients .clients__you { padding: 0; }
.clients__you a {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; gap: .35em; font-size: clamp(18px, 1.8vw, 26px); letter-spacing: -.02em;
  background: var(--signal); color: #fff; transition: background .3s;
}
.clients__you a:hover { background: var(--ink); }

.all-cases {
  display: flex; align-items: center; gap: .25em; margin-top: clamp(48px, 7vw, 96px); padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: clamp(36px, 6vw, 96px); line-height: 1; letter-spacing: -.05em; font-weight: 500;
}
.all-cases__dash { flex: 1; height: .06em; background: currentColor; transform-origin: left; transform: scaleX(.15); transition: transform .8s var(--ease); }
.all-cases:hover .all-cases__dash { transform: scaleX(1); }
.all-cases:hover { color: var(--signal); }

.video { position: relative; width: 100%; background: var(--accent); overflow: hidden; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.mark--hero { will-change: transform; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form { position: relative; }