/* VST Soft — site styles. Paper / ink / signal: a drafting-sheet look. */

@font-face { font-family: "Golos"; font-weight: 400; font-display: swap; src: url(fonts/golos-cyrillic-400.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Golos"; font-weight: 500; font-display: swap; src: url(fonts/golos-cyrillic-500.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Golos"; font-weight: 600; font-display: swap; src: url(fonts/golos-cyrillic-600.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Golos"; font-weight: 700; font-display: swap; src: url(fonts/golos-cyrillic-700.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "Golos"; font-weight: 400; font-display: swap; src: url(fonts/golos-latin-400.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+20BD, U+2122, U+2191-2193, U+2212, U+2215; }
@font-face { font-family: "Golos"; font-weight: 500; font-display: swap; src: url(fonts/golos-latin-500.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+20BD, U+2122, U+2191-2193, U+2212, U+2215; }
@font-face { font-family: "Golos"; font-weight: 600; font-display: swap; src: url(fonts/golos-latin-600.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+20BD, U+2122, U+2191-2193, U+2212, U+2215; }
@font-face { font-family: "Golos"; font-weight: 700; font-display: swap; src: url(fonts/golos-latin-700.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+20BD, U+2122, U+2191-2193, U+2212, U+2215; }
@font-face { font-family: "JB Mono"; font-weight: 400; font-display: swap; src: url(fonts/jbmono-cyrillic-400.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "JB Mono"; font-weight: 500; font-display: swap; src: url(fonts/jbmono-cyrillic-500.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "JB Mono"; font-weight: 400; font-display: swap; src: url(fonts/jbmono-latin-400.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20BD, U+2212; }
@font-face { font-family: "JB Mono"; font-weight: 500; font-display: swap; src: url(fonts/jbmono-latin-500.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F, U+20BD, U+2212; }

:root {
  --paper: #f3f0e8;
  --paper-2: #ebe7dc;
  --sheet: #fbfaf6;
  --ink: #16181c;
  --ink-2: #353a42;
  --muted: #62666d;
  --line: #d5cfc1;
  --line-strong: #16181c;
  --accent: #d9411e;          /* signal: large text, fills, marks */
  --accent-ink: #b0330f;      /* signal for small text on paper (5.6:1) */
  --green: #1d7a4b;
  --on-ink: #f3f0e8;
  --on-ink-muted: #a7a9ad;

  --font: "Golos", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JB Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --s1: .25rem; --s2: .5rem; --s3: .75rem; --s4: 1rem; --s5: 1.5rem; --s6: 2rem;
  --s7: 3rem; --s8: 4rem; --s9: 6rem; --s10: 8rem;

  --t-xs: .75rem; --t-sm: .875rem; --t-base: 1.0625rem; --t-lg: 1.25rem;
  --t-xl: clamp(1.4rem, 1.1rem + 1vw, 1.75rem);
  --t-2xl: clamp(1.75rem, 1.2rem + 2vw, 2.6rem);
  --t-3xl: clamp(2.2rem, 1.3rem + 3.6vw, 4.25rem);
  --t-hero: clamp(2.5rem, 1.2rem + 5.2vw, 5.6rem);

  --wrap: 1240px;
  --gut: clamp(16px, 4vw, 40px);
  --radius: 4px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 var(--t-base)/1.6 var(--font);
  text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--accent-ink); }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.08; letter-spacing: -.02em; text-wrap: balance; }
p { margin: 0 0 var(--s4); text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent); color: #fff; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gut); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; }
.mono { font-family: var(--mono); font-size: var(--t-xs); letter-spacing: .04em; text-transform: uppercase; }
.muted { color: var(--muted); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Header ---------- */
.hdr { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 1px solid var(--line); }
.hdr.scrolled { border-bottom-color: var(--ink); }
.hdr .wrap { display: flex; align-items: center; gap: var(--s6); height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex-shrink: 0; }
.logo:hover { color: var(--ink); }
.logo-mark { display: grid; place-items: center; width: 44px; height: 30px; background: var(--ink); color: var(--paper);
  font: 700 15px/1 var(--font); letter-spacing: .06em; position: relative; }
.logo-mark::after { content: ""; position: absolute; right: -4px; bottom: -4px; width: 8px; height: 8px; background: var(--accent); }
.logo-word { font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.logo-word span { color: var(--muted); font-weight: 500; }
.nav { display: flex; gap: var(--s5); margin-left: auto; align-items: center; }
.nav a { text-decoration: none; font-size: var(--t-sm); font-weight: 500; color: var(--ink-2); padding: 6px 0; position: relative; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--accent); }
.nav .btn { margin-left: var(--s2); color: var(--paper); padding: 0 16px; }
.nav .btn:hover { color: #fff; }
.nav a.btn[aria-current="page"] { color: var(--paper); }
.nav a.btn[aria-current="page"]::after { display: none; }
.burger { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--ink); background: none; cursor: pointer; padding: 0; }
.burger span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 4px auto; transition: transform .2s var(--ease), opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .burger { display: block; }
  .nav { display: none; position: fixed; inset: 68px 0 0; background: var(--paper); flex-direction: column; align-items: stretch;
    gap: 0; padding: var(--s4) var(--gut) var(--s7); overflow-y: auto; border-top: 1px solid var(--ink); }
  .nav.open { display: flex; }
  .nav a { font-size: var(--t-lg); padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"]::after { display: none; }
  .nav .btn { margin: var(--s5) 0 0; justify-content: center; }
}

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 22px; border: 1px solid var(--ink);
  background: var(--ink); color: var(--paper); font: 500 var(--t-sm)/1 var(--font); text-decoration: none; cursor: pointer;
  border-radius: var(--radius); transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease); white-space: nowrap; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn .arr { transition: transform .2s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-sm { min-height: 40px; padding: 0 16px; }
.btn-lg { min-height: 56px; padding: 0 28px; font-size: var(--t-base); }
.on-ink .btn { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.on-ink .btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.on-ink .btn-ghost { background: transparent; color: var(--paper); border-color: var(--on-ink-muted); }
.on-ink .btn-ghost:hover { border-color: var(--paper); background: transparent; color: var(--paper); }
.link-arr { font-weight: 500; text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 1px; }

/* ---------- Section scaffolding ---------- */
.sec { padding-block: clamp(var(--s8), 8vw, var(--s10)); }
.sec-tight { padding-block: clamp(var(--s7), 6vw, var(--s9)); }
.sec + .sec { border-top: 1px solid var(--line); }
.sec-head { display: grid; grid-template-columns: 200px 1fr; gap: var(--s6); margin-bottom: clamp(var(--s6), 4vw, var(--s8)); align-items: start; }
.sec-head .idx { padding-top: .55em; border-top: 1px solid var(--ink); }
.sec-head h2 { font-size: var(--t-3xl); max-width: 18ch; }
.sec-head p { margin-top: var(--s4); color: var(--ink-2); max-width: 58ch; font-size: var(--t-lg); }
@media (max-width: 760px) { .sec-head { grid-template-columns: 1fr; gap: var(--s4); } .sec-head .idx { justify-self: start; padding-right: 2rem; } }

.on-ink { background: var(--ink); color: var(--on-ink); }
.on-ink .muted, .on-ink .sec-head p { color: var(--on-ink-muted); }
.on-ink .sec-head .idx { border-color: var(--on-ink-muted); }
.on-ink a:hover { color: #fff; }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(var(--s7), 7vw, var(--s9)); padding-bottom: var(--s7); }
.hero-top { display: grid; grid-template-columns: 1.35fr 1fr; gap: var(--s7); align-items: end; }
.hero h1 { font-size: var(--t-hero); letter-spacing: -.035em; line-height: .98; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-lead { font-size: var(--t-lg); color: var(--ink-2); max-width: 46ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--s3); margin-top: var(--s5); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--s2) var(--s5); margin-top: var(--s6); color: var(--muted); }
.hero-meta span::before { content: "— "; color: var(--accent); }
@media (max-width: 900px) { .hero-top { grid-template-columns: 1fr; gap: var(--s5); } }

/* Drawing sheet frame: rulers on top/left, corner title */
.sheet { position: relative; margin-top: clamp(var(--s7), 6vw, var(--s8)); padding: 26px 0 0 26px; }
.sheet::before { /* top ruler */
  content: ""; position: absolute; left: 26px; right: 0; top: 0; height: 18px;
  background:
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 100px) bottom/100% 18px no-repeat,
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 20px) bottom/100% 8px no-repeat;
  opacity: .55;
}
.sheet::after { /* left ruler */
  content: ""; position: absolute; top: 26px; bottom: 0; left: 0; width: 18px;
  background:
    repeating-linear-gradient(180deg, var(--ink) 0 1px, transparent 1px 100px) right/18px 100% no-repeat,
    repeating-linear-gradient(180deg, var(--ink) 0 1px, transparent 1px 20px) right/8px 100% no-repeat;
  opacity: .55;
}
.sheet-body { border: 1px solid var(--ink); background: var(--sheet); box-shadow: 10px 10px 0 var(--paper-2); }
.sheet-tabs { display: flex; border-bottom: 1px solid var(--ink); overflow-x: auto; scrollbar-width: none; }
.sheet-tabs::-webkit-scrollbar { display: none; }
.sheet-tab { flex: 1 0 auto; display: flex; gap: 12px; align-items: baseline; padding: 14px 20px; border: 0; border-right: 1px solid var(--ink);
  background: transparent; font: 500 var(--t-sm)/1.2 var(--font); color: var(--muted); cursor: pointer; text-align: left; }
.sheet-tab:last-child { border-right: 0; }
.sheet-tab .mono { color: inherit; }
.sheet-tab:hover { color: var(--ink); background: var(--paper); }
.sheet-tab[aria-selected="true"] { color: var(--paper); background: var(--ink); }
.sheet-tab[aria-selected="true"] .mono { color: var(--accent); }
.sheet-view { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--paper-2); }
.sheet-view img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top left;
  opacity: 0; transition: opacity .45s var(--ease); }
.sheet-view img.on { opacity: 1; }
.sheet-foot { display: grid; grid-template-columns: 1fr auto auto; border-top: 1px solid var(--ink); font-size: var(--t-sm); }
.sheet-foot[hidden] { display: none; }
.sheet-foot > * { padding: 12px 20px; border-right: 1px solid var(--ink); }
.sheet-foot > *:last-child { border-right: 0; }
.sheet-foot a { text-decoration: none; font-weight: 500; }
@media (max-width: 640px) {
  .sheet { padding: 0; } .sheet::before, .sheet::after { display: none; }
  .sheet-body { box-shadow: 6px 6px 0 var(--paper-2); }
  .sheet-foot { grid-template-columns: 1fr; } .sheet-foot > * { border-right: 0; border-bottom: 1px solid var(--ink); } .sheet-foot > *:last-child { border-bottom: 0; }
  .sheet-tab { padding: 12px 14px; }
}

/* ---------- Facts strip ---------- */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.fact { padding: var(--s5) var(--s5) var(--s5) 0; }
.fact + .fact { border-left: 1px solid var(--line); padding-left: var(--s5); }
.fact b { display: block; white-space: nowrap; font-size: clamp(1.5rem, 1rem + 1.5vw, 2.25rem); font-weight: 600; letter-spacing: -.03em; line-height: 1.1; }
.fact span { display: block; margin-top: 6px; color: var(--muted); font-size: var(--t-sm); }
@media (max-width: 900px) { .facts { grid-template-columns: 1fr 1fr; } .fact:nth-child(3) { border-left: 0; padding-left: 0; } .fact:nth-child(n+3) { border-top: 1px solid var(--line); } }
@media (max-width: 420px) { .facts { grid-template-columns: 1fr; } .fact + .fact { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); } }

/* ---------- Product rows (home + catalog) ---------- */
.prod { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(var(--s6), 5vw, var(--s8)); align-items: center; }
.prod + .prod { margin-top: clamp(var(--s8), 8vw, var(--s10)); }
.prod:nth-of-type(even) .prod-media { order: -1; }
.prod-no { display: flex; align-items: center; gap: 12px; color: var(--muted); }
.prod-no::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.prod h3 { font-size: var(--t-3xl); margin-top: var(--s4); letter-spacing: -.03em; }
.prod h3 a { text-decoration: none; }
.prod-lead { font-size: var(--t-lg); color: var(--ink-2); margin-top: var(--s4); }
.prod-media { position: relative; display: block; border: 1px solid var(--ink); background: var(--sheet); }
.prod-media img { width: 100%; }
.prod-media .tag { position: absolute; left: -1px; top: -1px; background: var(--ink); color: var(--paper); padding: 6px 10px; }
.prod-actions { display: flex; flex-wrap: wrap; gap: var(--s3); margin-top: var(--s5); align-items: center; }
@media (max-width: 900px) { .prod { grid-template-columns: 1fr; } .prod:nth-of-type(even) .prod-media { order: 0; } }

/* GOST title block ("штамп") used as a spec card */
.stamp { width: 100%; border-collapse: collapse; border: 2px solid var(--ink); margin-top: var(--s5); font-size: var(--t-sm); background: var(--sheet); }
.stamp th, .stamp td { border: 1px solid var(--ink); padding: 9px 12px; text-align: left; vertical-align: top; }
.stamp th { width: 34%; font: 400 var(--t-xs)/1.4 var(--mono); text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.stamp td b { font-size: var(--t-lg); font-weight: 600; letter-spacing: -.02em; }

/* ---------- Feature list (numbered spec) ---------- */
.specs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 clamp(var(--s6), 5vw, var(--s8)); counter-reset: spec; list-style: none; }
.specs li { counter-increment: spec; display: grid; grid-template-columns: 56px 1fr; padding: var(--s5) 0; border-top: 1px solid var(--line); }
.specs li::before { content: counter(spec, decimal-leading-zero); font: 500 var(--t-sm)/1.7 var(--mono); color: var(--accent-ink); }
.specs h3 { font-size: var(--t-lg); letter-spacing: -.01em; line-height: 1.3; }
.specs p { margin: 6px 0 0; color: var(--ink-2); font-size: var(--t-base); }
.on-ink .specs li { border-color: #33373e; }
.on-ink .specs li::before { color: var(--accent); }
.on-ink .specs p { color: var(--on-ink-muted); }
@media (max-width: 760px) { .specs { grid-template-columns: 1fr; } .specs li { grid-template-columns: 44px 1fr; } }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; border-top: 1px solid var(--ink); counter-reset: st; }
.steps li { counter-increment: st; padding: var(--s5) var(--s5) 0 0; }
.steps li + li { padding-left: var(--s5); border-left: 1px solid var(--line); }
.steps li::before { content: counter(st); display: block; font-size: var(--t-3xl); font-weight: 600; letter-spacing: -.04em; line-height: 1; color: var(--accent); margin-bottom: var(--s4); }
.steps h3 { font-size: var(--t-lg); line-height: 1.3; }
.steps p { margin-top: 8px; color: var(--ink-2); font-size: var(--t-base); }
.on-ink .steps { border-color: var(--on-ink-muted); }
.on-ink .steps li + li { border-color: #33373e; }
.on-ink .steps p { color: var(--on-ink-muted); }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } .steps li:nth-child(3) { border-left: 0; padding-left: 0; } .steps li:nth-child(n+3) { margin-top: var(--s6); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } .steps li + li { border-left: 0; padding-left: 0; margin-top: var(--s5); border-top: 1px solid var(--line); } }

/* ---------- Price cards ---------- */
.prices { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--ink); background: var(--sheet); }
.price { display: flex; flex-direction: column; padding: var(--s6) var(--s5); border-right: 1px solid var(--ink); }
.price:last-child { border-right: 0; }
.price.hl { background: var(--ink); color: var(--on-ink); }
.price .mono { color: var(--muted); }
.price.hl .mono { color: var(--accent); }
.price h3 { font-size: var(--t-xl); margin-top: var(--s3); letter-spacing: -.02em; }
.price .sum { font-size: var(--t-2xl); font-weight: 600; letter-spacing: -.03em; margin-top: var(--s5); line-height: 1; }
.price .sum small { font-size: var(--t-sm); font-weight: 400; color: var(--muted); letter-spacing: 0; }
.price.hl .sum small { color: var(--on-ink-muted); }
.price s { color: var(--muted); font-size: var(--t-sm); }
.price.hl s { color: var(--on-ink-muted); }
.price ul { list-style: none; margin: var(--s5) 0 var(--s6); font-size: var(--t-sm); }
.price li { padding: 7px 0 7px 20px; border-top: 1px solid var(--line); position: relative; }
.price.hl li { border-color: #33373e; }
.price li::before { content: ""; position: absolute; left: 0; top: 14px; width: 8px; height: 2px; background: var(--accent); }
.price .btn { margin-top: auto; justify-content: center; }
.price.hl .btn { background: var(--accent); border-color: var(--accent); color: #fff; }
.price.hl .btn:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.prices.p3 { grid-template-columns: repeat(3, 1fr); }
.price .btn + .btn { margin-top: 8px; }
@media (max-width: 1080px) { .prices.p3 { grid-template-columns: 1fr; } .prices.p3 .price { border-right: 0; border-bottom: 1px solid var(--ink); } .prices.p3 .price:last-child { border-bottom: 0; } }
@media (max-width: 1080px) { .prices { grid-template-columns: 1fr 1fr; } .price:nth-child(2) { border-right: 0; } .price:nth-child(-n+2) { border-bottom: 1px solid var(--ink); } }
@media (max-width: 600px) { .prices { grid-template-columns: 1fr; } .price { border-right: 0; border-bottom: 1px solid var(--ink); } .price:last-child { border-bottom: 0; } }

/* ---------- Tables ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: var(--t-sm); }
.tbl th, .tbl td { padding: 12px 14px 12px 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.tbl thead th { font: 400 var(--t-xs)/1.4 var(--mono); text-transform: uppercase; letter-spacing: .04em; color: var(--muted); border-bottom: 1px solid var(--ink); }
.tbl td:first-child { font-weight: 500; }
.tbl .yes { color: var(--green); font-weight: 600; }
.tbl-scroll { overflow-x: auto; }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: var(--s5); padding: var(--s5) 0;
  font-size: var(--t-lg); font-weight: 500; letter-spacing: -.01em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 1.6rem/1 var(--mono); color: var(--accent-ink); transition: transform .2s var(--ease); flex-shrink: 0; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .a { padding: 0 0 var(--s5); max-width: 72ch; color: var(--ink-2); }
.faq-grid { display: grid; grid-template-columns: 1fr 2fr; gap: clamp(var(--s6), 5vw, var(--s8)); }
@media (max-width: 900px) { .faq-grid { grid-template-columns: 1fr; } }

/* ---------- Product page ---------- */
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); padding-top: var(--s6); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); }
.crumbs span[aria-hidden] { color: var(--line); }
.p-hero { padding: var(--s6) 0 var(--s8); display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(var(--s6), 5vw, var(--s8)); align-items: end; }
.p-hero h1 { font-size: var(--t-hero); letter-spacing: -.04em; line-height: .98; }
.p-hero h1 .pre { display: block; font-size: .32em; letter-spacing: 0; color: var(--muted); font-weight: 500; margin-bottom: .5em; }
.p-hero .lead { font-size: var(--t-lg); color: var(--ink-2); margin-top: var(--s5); max-width: 52ch; }
.buybox { border: 2px solid var(--ink); background: var(--sheet); }
.buybox > div { padding: var(--s5); }
.buybox > div + div { border-top: 1px solid var(--ink); }
.buybox .sum { font-size: var(--t-3xl); font-weight: 600; letter-spacing: -.04em; line-height: 1; }
.buybox .sum small { font-size: var(--t-sm); font-weight: 400; color: var(--muted); letter-spacing: 0; }
.buybox .btn { width: 100%; justify-content: center; }
.buybox .row { display: flex; flex-direction: column; gap: var(--s2); }
.buybox ul { list-style: none; font-size: var(--t-sm); color: var(--ink-2); }
.buybox li { padding: 3px 0 3px 18px; position: relative; }
.buybox li::before { content: ""; position: absolute; left: 0; top: 13px; width: 8px; height: 2px; background: var(--accent); }
@media (max-width: 900px) { .p-hero { grid-template-columns: 1fr; } }

.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--s4); }
.shot { grid-column: span 6; margin: 0; }
.shot.wide { grid-column: span 12; }
.shot.third { grid-column: span 4; }
.shot button { display: block; width: 100%; padding: 0; border: 1px solid var(--ink); background: var(--sheet); cursor: zoom-in; position: relative; }
.shot button::after { content: "⤢"; position: absolute; right: 10px; top: 10px; width: 32px; height: 32px; display: grid; place-items: center;
  background: var(--ink); color: var(--paper); font-size: 16px; opacity: 0; transition: opacity .2s; }
.shot button:hover::after, .shot button:focus-visible::after { opacity: 1; }
.shot figcaption { display: flex; gap: 12px; padding-top: 10px; font-size: var(--t-sm); color: var(--ink-2); }
.shot figcaption .mono { color: var(--accent-ink); flex-shrink: 0; padding-top: 2px; }
@media (max-width: 760px) { .shot, .shot.third { grid-column: span 12; } }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(var(--s6), 5vw, var(--s8)); }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }
.who { list-style: none; border-top: 1px solid var(--ink); }
.who li { padding: var(--s4) 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 28px 1fr; font-size: var(--t-base); }
.who li::before { content: "→"; color: var(--accent-ink); font-family: var(--mono); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.chips li { font: 500 var(--t-xs)/1 var(--mono); letter-spacing: .03em; border: 1px solid var(--ink); padding: 8px 10px; background: var(--sheet); }
.chips li.out { background: var(--ink); color: var(--paper); }

/* ---------- Lightbox ---------- */
.lb { border: 0; padding: 0; max-width: 96vw; max-height: 94vh; background: transparent; overflow: visible; }
.lb::backdrop { background: rgba(14, 15, 18, .88); }
.lb img { max-width: 96vw; max-height: 86vh; width: auto; border: 1px solid #000; background: #fff; }
.lb p { color: var(--paper); margin: 10px 0 0; font-size: var(--t-sm); }
.lb-close { position: absolute; right: 0; top: -52px; width: 44px; height: 44px; border: 1px solid var(--paper); background: transparent; color: var(--paper); font-size: 22px; cursor: pointer; }
.lb-close:hover { background: var(--accent); border-color: var(--accent); }

/* ---------- CTA band ---------- */
.cta { padding-block: clamp(var(--s8), 8vw, var(--s10)); }
.cta-in { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--s7); align-items: end; }
.cta h2 { font-size: var(--t-3xl); letter-spacing: -.035em; max-width: 16ch; }
.cta p { color: var(--on-ink-muted); font-size: var(--t-lg); max-width: 44ch; }
.cta .row { display: flex; flex-wrap: wrap; gap: var(--s3); margin-top: var(--s5); }
@media (max-width: 860px) { .cta-in { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.ftr { background: var(--ink); color: var(--on-ink); padding-top: var(--s8); overflow: hidden; border-top: 1px solid #2a2d33; }
.ftr-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--s6); }
.ftr h4 { font: 400 var(--t-xs)/1.4 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--on-ink-muted); margin-bottom: var(--s4); }
.ftr ul { list-style: none; }
.ftr li { margin-bottom: 10px; font-size: var(--t-sm); }
.ftr a { text-decoration: none; color: var(--on-ink); }
.ftr a:hover { color: #fff; text-decoration: underline; }
.ftr .about { color: var(--on-ink-muted); font-size: var(--t-sm); max-width: 36ch; }
.ftr .mail { font-size: var(--t-lg); font-weight: 500; }
.ftr-big { font-weight: 700; font-size: clamp(7rem, 30vw, 26rem); line-height: .78; letter-spacing: -.06em; margin: var(--s8) 0 0 -.04em;
  color: transparent; -webkit-text-stroke: 1px #4a4f57; user-select: none; white-space: nowrap; }
.ftr-big span { -webkit-text-stroke: 0; color: var(--accent); font-size: .2em; letter-spacing: 0; vertical-align: top; margin-left: .2em; }
.ftr-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s3); border-top: 1px solid #2a2d33; padding: var(--s5) 0; color: var(--on-ink-muted); font-size: var(--t-xs); }
@media (max-width: 900px) { .ftr-grid { grid-template-columns: 1fr 1fr; } .ftr-grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 480px) { .ftr-grid { grid-template-columns: 1fr; } }

/* ---------- Page head (inner pages) ---------- */
.ph { padding: var(--s6) 0 clamp(var(--s7), 6vw, var(--s8)); border-bottom: 1px solid var(--ink); }
.ph h1 { font-size: var(--t-3xl); letter-spacing: -.035em; margin-top: var(--s5); max-width: 20ch; }
.ph p { font-size: var(--t-lg); color: var(--ink-2); margin-top: var(--s4); max-width: 60ch; }

/* ---------- Legal / prose ---------- */
.doc { display: grid; grid-template-columns: 240px 1fr; gap: clamp(var(--s6), 5vw, var(--s8)); padding-block: var(--s7) var(--s9); }
.doc-nav { position: sticky; top: 100px; align-self: start; font-size: var(--t-sm); }
.doc-nav ul { list-style: none; border-top: 1px solid var(--ink); }
.doc-nav li { border-bottom: 1px solid var(--line); }
.doc-nav a { display: block; padding: 10px 0; text-decoration: none; color: var(--ink-2); }
.doc-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; box-shadow: inset 3px 0 0 var(--accent); padding-left: 12px; }
.prose { max-width: 74ch; }
.prose h2 { font-size: var(--t-xl); margin: var(--s7) 0 var(--s4); letter-spacing: -.02em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: var(--t-lg); margin: var(--s5) 0 var(--s3); }
.prose p, .prose li { color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 1.3em; margin-bottom: var(--s4); }
.prose li { margin-bottom: 6px; }
.prose table { width: 100%; border-collapse: collapse; margin: var(--s4) 0 var(--s5); font-size: var(--t-sm); }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--paper-2); font-weight: 600; color: var(--ink); }
.prose .rev { font-family: var(--mono); font-size: var(--t-xs); text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.req { border: 1px solid var(--ink); background: var(--sheet); padding: var(--s5); margin-top: var(--s6); font-size: var(--t-sm); }
.req dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; margin: 0; }
.req dt { color: var(--muted); } .req dd { margin: 0; font-weight: 500; }
@media (max-width: 860px) { .doc { grid-template-columns: 1fr; } .doc-nav { position: static; } }
@media (max-width: 480px) { .req dl { grid-template-columns: 1fr; } .req dd { margin-bottom: 8px; } }

/* ---------- Cards grid (docs index, support) ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.card { display: flex; flex-direction: column; gap: var(--s3); padding: var(--s5); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  text-decoration: none; min-height: 200px; transition: background .2s var(--ease); }
a.card:hover { background: var(--sheet); color: var(--ink); }
.card h3 { font-size: var(--t-lg); line-height: 1.3; }
.card p { margin: 0; color: var(--ink-2); font-size: var(--t-sm); }
.card .mono { color: var(--accent-ink); }
.card .go { margin-top: auto; font-weight: 500; font-size: var(--t-sm); }
@media (max-width: 900px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } .card { min-height: 0; } }

/* ---------- Forms ---------- */
.form { display: grid; gap: var(--s5); }
.field { display: grid; gap: 8px; align-content: start; }
.field label, .field legend { font-size: var(--t-sm); font-weight: 500; }
.field .hint { font-size: var(--t-xs); color: var(--muted); }
.field input[type=text], .field input[type=email], .field input[type=tel], .field input[type=number], .field textarea, .field select {
  width: 100%; min-height: 50px; padding: 12px 14px; border: 1px solid var(--ink); border-radius: var(--radius); background: var(--sheet);
  font: 400 var(--t-base)/1.4 var(--font); color: var(--ink); }
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.field [aria-invalid="true"] { border-color: var(--accent); background: #fdf0ec; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s5); }
@media (max-width: 600px) { .row-2 { grid-template-columns: 1fr; } }
.pick { display: grid; gap: 0; border: 1px solid var(--ink); }
.pick label { display: grid; grid-template-columns: 24px 1fr auto; gap: 12px; align-items: center; padding: 14px 16px; cursor: pointer; background: var(--sheet); }
.pick label + label { border-top: 1px solid var(--line); }
.pick label:has(input:checked) { background: var(--paper-2); }
.pick input { width: 18px; height: 18px; accent-color: var(--accent); margin: 0; }
.pick .nm { font-weight: 500; }
.pick .nm small { display: block; font-weight: 400; color: var(--muted); font-size: var(--t-xs); }
.pick .pr { font-family: var(--mono); font-size: var(--t-sm); white-space: nowrap; }
.check { display: grid; grid-template-columns: 22px 1fr; gap: 10px; font-size: var(--t-sm); color: var(--ink-2); align-items: start; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--accent); }
.total { display: flex; justify-content: space-between; align-items: baseline; border-top: 2px solid var(--ink); padding-top: var(--s4); }
.total b { font-size: var(--t-2xl); letter-spacing: -.03em; }
.form-msg { padding: var(--s4) var(--s5); border: 1px solid var(--ink); background: var(--sheet); display: none; }
.form-msg.ok { display: block; border-color: var(--green); box-shadow: inset 4px 0 0 var(--green); }
.form-msg.err { display: block; border-color: var(--accent); box-shadow: inset 4px 0 0 var(--accent); }
.hp { position: absolute; left: -5000px; }
.order { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(var(--s6), 5vw, var(--s8)); padding-block: var(--s7) var(--s9); }
.aside-box { border: 1px solid var(--ink); background: var(--sheet); padding: var(--s5); position: sticky; top: 100px; align-self: start; }
.aside-box h2 { font-size: var(--t-lg); margin-bottom: var(--s4); }
.aside-box ol { padding-left: 1.2em; color: var(--ink-2); font-size: var(--t-sm); }
.aside-box li { margin-bottom: 10px; }
@media (max-width: 900px) { .order { grid-template-columns: 1fr; } .aside-box { position: static; } }

/* ---------- Contacts ---------- */
.contact-big { font-size: var(--t-2xl); font-weight: 600; letter-spacing: -.03em; text-decoration: none; border-bottom: 2px solid var(--accent); }

/* ---------- 404 ---------- */
.nf { padding-block: var(--s9); }
.nf b { display: block; font-size: clamp(6rem, 22vw, 16rem); line-height: .8; letter-spacing: -.06em; color: transparent; -webkit-text-stroke: 1.5px var(--ink); }

/* ---------- Reveal on scroll ---------- */
.js .rv { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .js .rv { opacity: 1; transform: none; }
}

@media print { .hdr, .ftr, .cta, .burger { display: none; } body { background: #fff; } }

/* ---------- Снимки: единая пропорция 16:10 (src/normalize.py) ---------- */
.shot button img, .prod-media img { aspect-ratio: 16 / 10; width: 100%; height: auto; object-fit: contain; background: var(--paper-2); }

/* ---------- Цены: четыре программы в ряд + полоса комплекта ---------- */
.prices.p5 { grid-template-columns: repeat(4, 1fr); }
.prices.p5 .price:nth-child(4) { border-right: 0; }
.prices.p5 .price.hl { grid-column: 1 / -1; border-right: 0; border-top: 1px solid var(--ink); display: grid; grid-template-columns: 1.2fr 1fr auto; column-gap: var(--s8); align-items: start; }
.prices.p5 .hl > .mono { grid-column: 1; grid-row: 1; }
.prices.p5 .hl > h3 { grid-column: 1; grid-row: 2; }
.prices.p5 .hl > .sum { grid-column: 1; grid-row: 3; }
.prices.p5 .hl > s { grid-column: 1; grid-row: 4; }
.prices.p5 .hl > ul { grid-column: 2; grid-row: 1 / span 4; margin: 0; }
.prices.p5 .hl > .btn { grid-column: 3; grid-row: 1 / span 4; align-self: center; margin: 0; }
@media (max-width: 1080px) {
  .prices.p5 { grid-template-columns: 1fr 1fr; }
  .prices.p5 .price { border-right: 0; border-bottom: 1px solid var(--ink); }
  .prices.p5 .price:nth-child(odd):not(.hl) { border-right: 1px solid var(--ink); }
  .prices.p5 .price.hl { grid-template-columns: 1fr 1fr; border-top: 0; border-bottom: 0; }
  .prices.p5 .hl > .btn { grid-column: 1 / -1; grid-row: auto; margin-top: var(--s5); }
}
@media (max-width: 600px) {
  .prices.p5 { grid-template-columns: 1fr; }
  .prices.p5 .price:nth-child(odd):not(.hl) { border-right: 0; }
  .prices.p5 .price.hl { display: flex; }
  .prices.p5 .hl > ul { margin: var(--s5) 0 var(--s6); }
}
@media (max-width: 640px) { .sheet-tabs { display: grid; grid-template-columns: 1fr 1fr; } .sheet-tab { border-bottom: 1px solid var(--ink); } .sheet-tab:nth-child(2n) { border-right: 0; } .sheet-tab:nth-last-child(-n+2) { border-bottom: 0; } }
@media (min-width: 1081px) { .prices .price:not(.hl) h3 { min-height: 2.4em; } }