/* ==========================================================================
   Евгений Рябышев — Product Engineer
   Арт-дирекция: мятая тёплая бумага, чёрная типографика, красная шапка
   как единственный яркий акцент. Слои «листов» с тонкими тенями и сгибами.
   ========================================================================== */

:root {
  --paper:        #EFECE4;
  --paper-2:      #F6F4EF;
  --sheet:        #FCFBF7;
  --ink:          #16140F;
  --ink-70:       #443F36;
  --ink-45:       #6E6759;
  --rule:         #CFC9BB;
  --red:          #D92211;
  --red-dark:     #A8180B;

  --wrap:         1180px;
  --gut:          clamp(18px, 4vw, 40px);
  --cap-h:        52px;

  --f-display:    'Unbounded', 'Onest', system-ui, sans-serif;
  --f-body:       'Onest', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-mono:       'JetBrains Mono', ui-monospace, 'SFMono-Regular', monospace;

  --shadow-sheet: 0 1px 0 rgba(22,20,15,.05), 0 26px 44px -34px rgba(22,20,15,.55);
  --ease:         cubic-bezier(.16,1,.3,1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  position: relative;
  background-color: var(--paper);
  background-image: radial-gradient(120% 80% at 12% -10%, rgba(255,255,255,.6), transparent 62%);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* фактура мятой бумаги — отдельным слоем, чтобы держать низкий контраст */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0;
  background-image: url('assets/paper-tile.webp');
  background-size: 1000px 1000px;
  background-repeat: repeat;
  mix-blend-mode: multiply;
  opacity: .3;
  pointer-events: none;
}
body > * { position: relative; z-index: 1; }

img { max-width: 100%; display: block; height: auto; }

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: .98;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1em; }

a { color: inherit; }

section[id], span[id] { scroll-margin-top: calc(var(--cap-h) + 20px); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut); }

.mono {
  font-family: var(--f-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: #fff; padding: 10px 16px;
}
.skip:focus { left: 8px; top: 8px; }

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

/* ============================ КРАСНАЯ ШАПКА ============================== */

.cap {
  position: sticky; top: 0; z-index: 100;
  background: var(--red);
  color: #fff;
  box-shadow: 0 1px 0 rgba(22,20,15,.18), 0 10px 24px -20px rgba(22,20,15,.9);
  border-bottom: 1px solid rgba(0,0,0,.12);
}
.cap__in {
  max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gut);
  min-height: var(--cap-h);
  display: flex; align-items: center; gap: clamp(12px, 3vw, 34px);
}
.cap__logo {
  display: inline-flex; align-items: center; gap: 9px;
  text-decoration: none; color: #fff;
  font-family: var(--f-display); font-weight: 800;
  font-size: 14px; letter-spacing: -.01em;
  padding: 6px 0;
}
.cap__logo .mark { color: #fff; flex: none; }
.cap__logo:hover .mark { transform: rotate(-7deg); }
.cap__logo .mark { transition: transform .35s var(--ease); }
.cap__name { white-space: nowrap; }

.cap__nav { display: flex; gap: clamp(10px, 2vw, 22px); margin-left: auto; }
.cap__nav a {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .07em;
  text-transform: uppercase; text-decoration: none;
  padding: 5px 0;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}
.cap__nav a:hover, .cap__nav a:focus-visible { border-bottom-color: #fff; }

.cap__cta {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .07em;
  text-transform: uppercase; text-decoration: none;
  background: #fff; color: var(--red-dark);
  padding: 8px 14px;
  white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.cap__cta:hover { background: var(--ink); color: #fff; }

/* ================================= HERO ================================== */

.hero { position: relative; padding: clamp(48px, 9vw, 108px) 0 clamp(40px, 7vw, 78px); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
}

.kicker {
  font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--red);
  margin: 0 0 clamp(14px, 2vw, 22px);
  display: inline-flex; align-items: center; gap: 10px;
}
.kicker::before {
  content: ""; width: clamp(26px, 5vw, 54px); height: 2px; background: var(--red);
}

.hero__title {
  font-size: clamp(2.7rem, 8.4vw, 6.1rem);
  line-height: .9;
  letter-spacing: -.045em;
  margin-bottom: clamp(18px, 3vw, 30px);
}
.hero__title span { display: block; }
.hero__title span:last-child { margin-left: clamp(0px, 3vw, 54px); }

.hero__lead {
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(1.12rem, 2.3vw, 1.6rem);
  line-height: 1.22; letter-spacing: -.02em;
  max-width: 22ch;
  margin-bottom: clamp(14px, 2vw, 22px);
}
.hero__lead::after {
  content: ""; display: block; width: 100%; max-width: 220px; height: 2px;
  background: var(--ink); margin-top: clamp(14px, 2vw, 22px); opacity: .85;
}
.hero__sub { max-width: 46ch; color: var(--ink-70); }

.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: clamp(18px, 3vw, 30px); }

.hero__note {
  font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-45);
  max-width: var(--wrap); margin: clamp(18px, 3vw, 30px) auto 0;
  padding: 0 var(--gut);
  text-align: right;
}

/* --------------------------------- КНОПКИ -------------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--f-mono); font-size: 13px; letter-spacing: .08em;
  text-transform: uppercase; text-decoration: none;
  padding: 14px 22px;
  border: 1.5px solid var(--ink);
  transition: transform .25s var(--ease), background .2s var(--ease), color .2s var(--ease), box-shadow .25s var(--ease);
}
.btn--solid { background: var(--ink); color: var(--paper-2); box-shadow: 4px 4px 0 rgba(22,20,15,.16); }
.btn--solid:hover { background: var(--red); border-color: var(--red); transform: translate(-2px,-2px); box-shadow: 7px 7px 0 rgba(168,24,11,.22); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper-2); transform: translate(-2px,-2px); }
.btn--lg { padding: 18px 30px; font-size: 14px; }

/* -------------------------------- ПОРТРЕТ ------------------------------- */

.portrait { margin: 0; --swap: 0; }

.portrait__stack {
  position: relative;
  background: var(--sheet);
  padding: 12px 12px 12px;
  box-shadow: var(--shadow-sheet);
  transform: rotate(-1.1deg);
  transition: transform .5s var(--ease);
}
.portrait__stack::after {
  /* тонкий сгиб бумаги: узкая складка у левого края листа */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(100deg, rgba(22,20,15,.05) 0 6%, rgba(255,255,255,.35) 6.6% 8%, transparent 9%),
    linear-gradient(200deg, transparent 78%, rgba(22,20,15,.05) 100%);
}
.portrait__img { display: block; position: relative; }
.portrait__img img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.portrait__img--front { opacity: calc(1 - var(--swap)); }
.portrait__img--back {
  position: absolute; inset: 12px;
  opacity: var(--swap);
}
.portrait__img--back img { height: 100%; }

.portrait:hover .portrait__stack, .portrait:focus-within .portrait__stack {
  transform: rotate(.65deg) translateY(-10px) scale(1.012);
}

.portrait__cap { margin-top: 14px; text-align: right; }
.portrait__btn {
  font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-45);
  background: none; border: 0; border-bottom: 1px dashed var(--rule);
  padding: 3px 0; cursor: pointer;
}
.portrait__btn:hover { color: var(--red); border-bottom-color: var(--red); }

/* ================================ СЕКЦИИ ================================ */

.band { padding: clamp(56px, 9vw, 118px) 0; position: relative; }
.band + .band { border-top: 1px solid var(--rule); }

.sec-num {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-45);
  margin: 0 0 clamp(16px, 2.4vw, 26px);
}
.sec-title {
  font-size: clamp(1.6rem, 4.1vw, 2.9rem);
  letter-spacing: -.035em;
  max-width: 20ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.split {
  display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(20px, 5vw, 64px);
  align-items: start;
}
.split .sec-title { margin-bottom: 0; }

.prose { color: var(--ink-70); max-width: 58ch; }
.prose--wide { max-width: 66ch; font-size: 1.05rem; }
.prose p:last-child { margin-bottom: 0; }

/* факты */
.facts {
  list-style: none; margin: clamp(34px, 5vw, 60px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1px; background: var(--rule);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.facts li {
  background: var(--paper-2);
  padding: clamp(18px, 2.5vw, 26px) clamp(16px, 2vw, 24px);
  display: flex; flex-direction: column; gap: 6px;
}
.facts b {
  font-family: var(--f-display); font-weight: 800; font-size: clamp(1.05rem, 2vw, 1.35rem);
  letter-spacing: -.03em;
}
.facts span { font-size: 14.5px; color: var(--ink-45); line-height: 1.45; }

/* ---------------------------- ЛИСТЫ / ПРОЕКТЫ --------------------------- */

.band--projects .sheet + .sheet { margin-top: clamp(22px, 3.5vw, 40px); }

.sheet {
  position: relative;
  background: var(--sheet);
  border: 1px solid rgba(22,20,15,.09);
  box-shadow: var(--shadow-sheet);
  padding: clamp(22px, 3.4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: clamp(16px, 3vw, 44px);
  align-items: start;
}
.sheet:nth-of-type(odd)  { transform: rotate(-.25deg); }
.sheet:nth-of-type(even) { transform: rotate(.28deg); }
.sheet::before {
  /* сгиб листа */
  content: ""; position: absolute; top: 0; bottom: 0; left: 32%; width: 2px;
  background: linear-gradient(to bottom, transparent, rgba(22,20,15,.07) 18%, rgba(22,20,15,.07) 82%, transparent);
  pointer-events: none;
}
.sheet__head h3 {
  font-size: clamp(1.25rem, 2.6vw, 1.85rem);
  letter-spacing: -.035em;
}
.sheet__head .alt {
  display: block;
  font-family: var(--f-body); font-weight: 400; font-size: .95rem;
  letter-spacing: 0; color: var(--ink-45); margin-top: 8px;
}
.sheet__head .role {
  font-family: var(--f-mono); font-size: 11.5px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--red);
  margin: 14px 0 0;
}
.sheet__body p { color: var(--ink-70); }
.sheet__body p:last-child { margin-bottom: 0; }
.sheet__body .hard { font-size: 15.5px; }
.tag {
  font-family: var(--f-mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink);
  border-bottom: 2px solid var(--red);
  margin-right: 8px; padding-bottom: 1px;
}
.sheet__foot { grid-column: 1 / -1; padding-top: clamp(8px, 1.5vw, 14px); }

.link {
  font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .07em;
  text-transform: uppercase; text-decoration: none;
  display: inline-flex; align-items: baseline; gap: 8px;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 3px;
  transition: color .2s var(--ease), border-color .2s var(--ease), gap .2s var(--ease);
}
.link::after { content: "→"; }
.link:hover { color: var(--red); border-color: var(--red); gap: 14px; }

/* метрика 1000 WAU */
.sheet--metric { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); }
.metric {
  grid-column: 1 / -1;
  display: flex; align-items: baseline; gap: clamp(12px, 2vw, 22px);
  border-top: 1px solid var(--rule);
  padding-top: clamp(14px, 2vw, 20px);
  margin-top: clamp(4px, 1vw, 10px);
}
.metric b {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(3rem, 10vw, 6.4rem);
  line-height: .82; letter-spacing: -.055em;
  color: var(--red);
}
.metric span {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-45);
  max-width: 20ch; line-height: 1.5;
}

/* --------------------------------- ОПЫТ --------------------------------- */

.exp { list-style: none; margin: 0; padding: 0; counter-reset: e; }
.exp li {
  counter-increment: e;
  display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: clamp(10px, 3vw, 44px);
  padding: clamp(20px, 3vw, 30px) 0;
  border-top: 1px solid var(--rule);
}
.exp li:last-child { border-bottom: 1px solid var(--rule); }
.exp h3 {
  font-size: clamp(1.15rem, 2.3vw, 1.6rem); letter-spacing: -.035em;
  display: flex; flex-direction: column; gap: 8px;
}
.exp h3::before {
  content: "0" counter(e);
  font-family: var(--f-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .12em; color: var(--red);
}
.exp .alt {
  font-family: var(--f-body); font-weight: 400; font-size: .95rem;
  letter-spacing: 0; color: var(--ink-45);
}
.exp p { color: var(--ink-70); margin: 0; }
.exp .muted { color: var(--ink-45); font-family: var(--f-mono); font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; }

/* ------------------------------ OPEN SOURCE ----------------------------- */

.oss {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: clamp(24px, 5vw, 60px); align-items: end;
}
.oss__link {
  display: block; text-decoration: none;
  background: var(--sheet);
  border: 1px solid rgba(22,20,15,.09);
  box-shadow: var(--shadow-sheet);
  padding: clamp(20px, 3vw, 30px);
  transform: rotate(.5deg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.oss__link .mono { color: var(--ink-45); display: block; margin-bottom: 10px; }
.oss__link b {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.1rem, 2.4vw, 1.7rem); letter-spacing: -.04em;
  word-break: break-word;
}
.oss__link:hover { transform: rotate(0) translateY(-4px); box-shadow: 0 1px 0 rgba(22,20,15,.05), 0 34px 50px -34px rgba(22,20,15,.6); }
.oss__link:hover b { color: var(--red); }

/* -------------------------------- УСЛУГИ -------------------------------- */

.svc { margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.svc > div { background: var(--paper-2); padding: clamp(20px, 3vw, 32px); }
.svc dt {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.05rem, 2.1vw, 1.35rem); letter-spacing: -.035em;
  margin-bottom: 12px;
}
.svc dd { margin: 0; color: var(--ink-70); font-size: 15.5px; }

/* --------------------------------- КАНАЛ -------------------------------- */

.chan { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: clamp(14px, 2.5vw, 26px); margin-top: clamp(26px, 4vw, 44px); }
.chan__item {
  text-decoration: none;
  background: var(--sheet);
  border: 1px solid rgba(22,20,15,.09);
  box-shadow: var(--shadow-sheet);
  padding: clamp(20px, 3vw, 30px);
  display: flex; flex-direction: column; gap: 10px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.chan__item:nth-child(1) { transform: rotate(-.5deg); }
.chan__item:nth-child(2) { transform: rotate(.4deg); }
.chan__item:hover { transform: rotate(0) translateY(-4px); box-shadow: 0 1px 0 rgba(22,20,15,.05), 0 34px 50px -34px rgba(22,20,15,.6); }
.chan__item .mono { color: var(--red); }
.chan__item b { font-family: var(--f-display); font-weight: 800; font-size: clamp(1.05rem, 2.2vw, 1.5rem); letter-spacing: -.04em; word-break: break-word; }
.chan__hint { font-size: 14.5px; color: var(--ink-45); }

/* ---------------------------------- CTA --------------------------------- */

.cta {
  padding: clamp(64px, 11vw, 140px) 0;
  border-top: 1px solid var(--rule);
  text-align: center;
}
.cta__title {
  font-size: clamp(2rem, 7vw, 4.6rem);
  letter-spacing: -.045em; line-height: .95;
  margin-bottom: clamp(18px, 3vw, 28px);
}
.cta__sub { color: var(--ink-70); max-width: 44ch; margin: 0 auto clamp(26px, 4vw, 40px); }
.cta__mark { color: var(--red); margin: 0 auto clamp(20px, 3vw, 30px); display: block; }

/* -------------------------------- ПОДВАЛ -------------------------------- */

.foot { background: var(--ink); color: #CFCAC0; padding: clamp(26px, 4vw, 40px) 0; }
.foot__in { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; justify-content: space-between; }
.foot .mono { margin: 0; color: #9A948A; }
.foot__nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.foot__nav a {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .07em;
  text-transform: uppercase; text-decoration: none; color: #E6E2DA;
  border-bottom: 1px solid transparent; padding-bottom: 2px;
}
.foot__nav a:hover { color: #fff; border-bottom-color: var(--red); }

/* ============================== АНИМАЦИИ ================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s var(--ease) var(--d, 0ms), transform .7s var(--ease) var(--d, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ============================= АДАПТИВНОСТЬ ============================= */

@media (max-width: 1000px) {
  .cap__nav a:nth-child(n+4) { display: none; }
}

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .portrait { max-width: 340px; margin-top: clamp(10px, 3vw, 24px); }
  .portrait__cap { text-align: left; }
  .split, .oss, .exp li, .sheet { grid-template-columns: 1fr; }
  .sheet::before { display: none; }
  .facts, .svc, .chan { grid-template-columns: 1fr; }
  .sec-title, .hero__lead { max-width: none; }
  .hero__note { text-align: left; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .cap__nav { display: none; }
  .cap__cta { margin-left: auto; }
  .sheet:nth-of-type(odd), .sheet:nth-of-type(even),
  .chan__item, .oss__link { transform: none; }
  .metric { flex-direction: column; align-items: flex-start; gap: 10px; }
  .btn { width: 100%; justify-content: center; }
  .hero__title span:last-child { margin-left: 0; }
}

/* ========================= PREFERS-REDUCED-MOTION ======================= */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .portrait__stack { transform: none; }
  .sheet, .chan__item, .oss__link { transform: none !important; }
}