@font-face { font-family: "Osifont"; src: url(osifont.woff) format("woff"); font-display: swap; }
@font-face { font-family: "Golos"; src: url(golos.woff) format("woff"); font-weight: 400 900; font-display: swap; }
:root { --slate: #36444d; --paper: #fcfdfc; --ink: #1a2126; --quiet: #55626b; --line: #1a2126; --thin: #8d999f; --dim: #1766c9; --err: #b92c1a; --oak: #b69b71; --pick: #e6eff9; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--slate); color: var(--ink); font: 400 17px/1.5 Golos, system-ui, sans-serif; -webkit-text-size-adjust: 100%; }
main { max-width: 1320px; margin: 0 auto; padding: 24px 24px 0; display: grid; gap: 24px; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--dim); text-underline-offset: 2px; }
:focus-visible { outline: 3px solid var(--dim); outline-offset: 2px; }
figure { margin: 0; }

/* лист: рамка по ГОСТ — слева поле под подшивку, с трёх сторон узкое */
.sheet { position: relative; background: var(--paper); padding: 10px 10px 10px 44px; box-shadow: 0 2px 0 rgba(0,0,0,.25); }
.sheet::before { content: ""; position: absolute; inset: 10px 10px 10px 44px; border: 2px solid var(--line); pointer-events: none; }
.sheet > * { position: relative; }

h1, h2, .brand, .lab, .sheetno, .mini { font-family: Osifont, Golos, sans-serif; font-style: oblique 14deg; font-weight: 400; }
h1 { font-size: clamp(38px, 5.4vw, 78px); line-height: 1.04; margin: 0 0 28px; letter-spacing: -.005em; text-wrap: balance; }
h2 { font-size: clamp(30px, 3.2vw, 44px); line-height: 1.1; margin: 0 0 14px; }
.brand { font-size: 26px; margin: 0 0 clamp(20px, 5vh, 56px); }
.lead { max-width: 34em; margin: 0 0 12px; font-size: 19px; }

.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr); grid-template-rows: 1fr auto; }
.hero-text { grid-column: 1; grid-row: 1 / span 2; padding: 30px 28px 30px 28px; align-self: center; }
.hero-fig { grid-column: 2; grid-row: 1; padding: 2px 2px 0 0; }
.hero-fig img { width: 100%; height: max(380px, calc(92vh - 320px)); max-height: 640px; object-fit: cover; object-position: 50% 22%; }

/* штамп: основная надпись чертежа, она же форма */
.stamp { grid-column: 2; grid-row: 2; display: grid; grid-template-columns: 96px repeat(3, 1fr); border-top: 2px solid var(--line); border-left: 2px solid var(--line); background: var(--paper); }
.c { padding: 9px 12px; border-right: 1px solid var(--thin); border-bottom: 1px solid var(--thin); min-width: 0; }
.lab { font-size: 18px; display: flex; align-items: center; }
.wide { grid-column: span 3; border-right: 0; padding: 0; display: flex; }
.full { grid-column: 1 / -1; border-right: 0; }
.stamp input[type=email] { width: 100%; border: 0; background: transparent; font: inherit; font-size: 19px; padding: 11px 12px; color: var(--ink); border-radius: 0; }
.stamp input[type=email]::placeholder { color: var(--thin); }
.stamp input[type=email]:focus { outline: 0; background: var(--pick); }
.roles label { flex: 1 1 0; position: relative; display: block; cursor: pointer; border-right: 1px solid var(--thin); }
.roles label:last-child { border-right: 0; }
.roles input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.roles span { display: block; padding: 10px 6px; text-align: center; font-size: 16px; }
.roles input:checked + span { background: var(--ink); color: var(--paper); }
.roles input:focus-visible + span { outline: 3px solid var(--dim); outline-offset: -3px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; line-height: 1.35; cursor: pointer; }
.check input { width: 17px; height: 17px; margin: 1px 0 0; accent-color: var(--ink); flex: none; }
.foot { border-bottom: 0; }
.sheetno { grid-column: span 2; display: flex; align-items: center; font-size: 17px; }
.go { grid-column: span 2; border-right: 0; padding: 0; }
.go button { width: 100%; height: 100%; min-height: 52px; border: 0; background: var(--ink); color: var(--paper); font: 500 18px Golos, sans-serif; cursor: pointer; border-radius: 0; }
.go button:hover { background: var(--dim); }
.go button[disabled] { background: var(--quiet); cursor: default; }
.msg { grid-column: 1 / -1; margin: 0; border-top: 1px solid var(--thin); font-size: 15.5px; }
.msg.bad { color: var(--err); }
.msg.ok { font-size: 18px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }

.two, .three { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 28px; padding-bottom: 44px; }
.col { padding: 34px 0 30px 28px; }
.two .col { grid-column: span 6; }
.two .drawing { grid-column: span 6; padding: 22px 24px 30px 0; }
.three .col { grid-column: span 6; }
.three .col:last-of-type { padding-right: 28px; padding-left: 0; }
.col > p { max-width: 34em; }
figcaption { font-size: 14.5px; color: var(--quiet); margin-top: 8px; }
.pack, .who { margin: 18px 0; display: grid; gap: 0; }
.pack dt, .who dt { font-weight: 600; margin-top: 12px; }
.pack dd, .who dd { margin: 0; max-width: 34em; color: var(--ink); }
.note { color: var(--quiet); border-left: 3px solid var(--oak); padding-left: 12px; }
.small { margin-top: 22px; max-width: 560px; }
.errs { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.errs li { color: var(--err); border-left: 3px solid var(--err); padding: 2px 0 2px 12px; max-width: 34em; }
.back { font-weight: 500; }
.mini { position: absolute; right: 10px; bottom: 10px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); padding: 3px 14px; font-size: 16px; }

footer { max-width: 1320px; margin: 0 auto; padding: 18px 24px 28px; color: #d5dcdf; font-size: 14.5px; }
footer a { color: #fff; }

.doc { max-width: 760px; margin: 24px auto; padding: 36px 36px 36px 60px; }
.doc h1 { font-size: clamp(30px, 4vw, 44px); }
.doc h2 { font-size: 24px; margin-top: 24px; }

@media (max-width: 920px) {
  main { padding: 10px 10px 0; gap: 10px; }
  .sheet { padding: 6px 6px 6px 18px; }
  .sheet::before { inset: 6px 6px 6px 18px; }
  .hero { display: block; min-height: 0; }
  .hero-text { padding: 20px 16px 14px; }
  .hero-fig { padding: 0 10px 12px; }
  .stamp { border-left: 0; grid-template-columns: 76px repeat(3, 1fr); }
  .hero-fig img { height: auto; max-height: none; }
  .lab { font-size: 16px; }
  .roles span { font-size: 14.5px; padding: 11px 2px; }
  .lead { font-size: 17px; }
  .two, .three { display: block; padding-bottom: 36px; }
  .col, .three .col:last-of-type { padding: 22px 16px 10px; }
  .two .drawing { padding: 10px 14px 16px; }
  .mini { right: 6px; bottom: 6px; }
  .doc { padding: 26px 18px 26px 30px; margin: 10px; }
}