/* Varzunelko — frame-scene */

:root{
  --bg:#f4f5f7;
  --bg-alt:#ffffff;
  --bg-dark:#23262b;
  --ink:#16181d;
  --ink-soft:#656b75;
  --ink-invert:#f4f5f7;
  --accent:#2d5bd6;
  --accent-2:#c9a00f;
  --rule:#d7dade;
  --rule-dark:#3a3f47;
  --sans:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --serif:Georgia,"Times New Roman",serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --gap:24px;
  --step:88px;
}

*{box-sizing:border-box;}

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

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--serif);
  font-size:18px;
  line-height:1.7;
  overflow-x:hidden;
}

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

a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
a:hover{text-decoration-thickness:2px;}
a:focus-visible,
button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap);}

/* ---------- typography ---------- */

h1,h2,h3{font-family:var(--sans);font-weight:800;color:var(--ink);}

h1{
  font-size:clamp(38px,6.4vw,74px);
  line-height:.98;
  letter-spacing:-.03em;
  margin:0 0 28px;
  max-width:14ch;
}

h2{
  font-size:clamp(26px,3.2vw,38px);
  line-height:1.06;
  letter-spacing:-.02em;
  margin:0 0 20px;
}

h3{
  font-size:20px;
  line-height:1.25;
  letter-spacing:-.01em;
  margin:28px 0 8px;
}

p{margin:0 0 20px;max-width:72ch;}

.lead{font-size:20px;line-height:1.6;color:var(--ink);}

.note{color:var(--ink-soft);font-size:15px;line-height:1.6;}

.cap{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--accent-2);
  margin:0;
}

/* ---------- header ---------- */

.masthead{background:var(--bg-alt);border-bottom:1px solid var(--rule);}

.masthead__in{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px 28px;
  padding-top:18px;
  padding-bottom:18px;
}

.brand{
  font-family:var(--sans);
  font-weight:800;
  font-size:20px;
  letter-spacing:-.02em;
  color:var(--ink);
  text-decoration:none;
  margin-right:auto;
}
.brand span{color:var(--accent);}

.nav{display:flex;flex-wrap:wrap;gap:8px 20px;}
.nav a{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.02em;
  color:var(--ink);
  text-decoration:none;
  padding:4px 0;
  border-bottom:2px solid transparent;
}
.nav a:hover{border-bottom-color:var(--accent);}
.nav a[aria-current="page"]{border-bottom-color:var(--accent-2);}

/* ---------- perforation strip ---------- */

.perf{
  height:14px;
  background-image:linear-gradient(90deg,var(--rule) 0 10px,transparent 10px 24px);
  background-size:24px 6px;
  background-repeat:repeat-x;
  background-position:0 4px;
}
.perf--dark{background-image:linear-gradient(90deg,var(--rule-dark) 0 10px,transparent 10px 24px);}

/* ---------- hero ---------- */

.hero{background:var(--bg-alt);padding:64px 0 72px;border-bottom:1px solid var(--rule);}

.hero__rail{grid-column:1 / span 2;}
.hero__index{list-style:none;margin:0;padding:0;}
.hero__index li{
  font-family:var(--mono);
  font-size:12px;
  line-height:1.35;
  color:var(--ink-soft);
  padding:10px 0;
  border-top:1px solid var(--rule);
  display:flex;
  gap:8px;
  align-items:flex-start;
}
.hero__index li::before{
  content:"";
  width:7px;height:7px;
  margin-top:6px;
  flex:0 0 auto;
  background:var(--accent);
}
.hero__index b{color:var(--accent-2);font-weight:400;}

.hero__body{grid-column:4 / span 9;}
.hero__body p{grid-column:auto;}
.hero__text{max-width:none;}
.hero__intro{max-width:56ch;}

.hero__frame{
  grid-column:7 / span 6;
  border:2px solid var(--ink);
  background:var(--bg);
  padding:26px 26px 18px;
  margin-top:20px;
  max-width:620px;
  justify-self:end;
  align-self:end;
}
.hero__frame h2{font-size:17px;letter-spacing:0;margin:0 0 14px;}
.hero__frame dl{margin:0;font-size:16px;line-height:1.6;}
.hero__frame dt{font-family:var(--sans);font-weight:700;font-size:14px;margin-top:12px;}
.hero__frame dt:first-child{margin-top:0;}
.hero__frame dd{margin:2px 0 0;color:var(--ink-soft);}
.hero__frame .cap{text-align:right;margin-top:18px;}

/* ---------- scenes ---------- */

.scene{padding:var(--step) 0;}
.scene--alt{background:var(--bg-alt);}
.scene--dark{background:var(--bg-dark);color:var(--ink-invert);}
.scene--dark h2,.scene--dark h3{color:var(--ink-invert);}
.scene--dark a{color:#9db6f2;}
.scene--dark .note{color:#a7adb6;}

.scene__mark{grid-column:1 / span 2;}
.scene__num{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--accent-2);
  display:block;
  padding-bottom:8px;
  border-bottom:1px solid var(--rule);
}
.scene--dark .scene__num{border-bottom-color:var(--rule-dark);}

.scene__body{grid-column:3 / span 7;}
.scene__wide{grid-column:3 / span 9;}

/* two-subcolumn lists */

.checklist{
  list-style:none;
  margin:8px 0 0;
  padding:0;
  columns:2;
  column-gap:var(--gap);
}
.checklist li{
  break-inside:avoid;
  padding:0 0 12px 20px;
  position:relative;
  font-size:17px;
  line-height:1.55;
}
.checklist li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:8px;height:8px;
  background:var(--accent);
}
.scene--dark .checklist li::before{background:var(--accent-2);}

.plainlist{list-style:none;margin:8px 0 20px;padding:0;}
.plainlist li{
  padding:0 0 10px 20px;
  position:relative;
  font-size:17px;
  line-height:1.6;
}
.plainlist li::before{
  content:"";
  position:absolute;left:0;top:9px;
  width:8px;height:8px;background:var(--accent);
}
.scene--dark .plainlist li::before{background:var(--accent-2);}

/* detail block inside dark scene */

.detail{
  grid-column:3 / span 4;
  border:2px solid var(--rule-dark);
  padding:22px;
  background:#1c1f23;
}
.detail h3{margin-top:0;font-size:17px;}
.detail p{font-size:16px;color:#c3c8d0;}
.detail p:last-child{margin-bottom:0;}
.detail__cap{margin-top:14px;}

.detail-text{grid-column:8 / span 5;}

/* ---------- about numbered blocks ---------- */

.step{padding:26px 0;border-top:1px solid var(--rule);}
.step:first-of-type{border-top:none;padding-top:0;}
.step__num{
  grid-column:1 / span 2;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--accent-2);
}
.step__body{grid-column:3 / span 7;}
.step__body h2{font-size:24px;margin-bottom:12px;}

/* ---------- legal / text pages ---------- */

.page-head{background:var(--bg-alt);border-bottom:1px solid var(--rule);padding:56px 0 44px;}
.page-head h1{font-size:clamp(32px,4.6vw,54px);max-width:20ch;margin-bottom:16px;}
.page-head .cap{margin-bottom:16px;}

.prose{grid-column:3 / span 7;}
.prose h2{font-size:26px;margin-top:44px;}
.prose h2:first-child{margin-top:0;}
.prose h3{font-size:19px;}
.aside-rail{grid-column:1 / span 2;}
.aside-rail .scene__num{border-bottom:none;}

/* ---------- footer ---------- */

.foot{background:var(--bg-dark);color:var(--ink-invert);}
.foot__in{padding:52px 0 44px;}
.foot .grid{align-items:start;}
.foot__left{grid-column:1 / span 6;}
.foot__right{grid-column:8 / span 5;}
.foot__brand{font-family:var(--sans);font-weight:800;font-size:22px;letter-spacing:-.02em;margin:0 0 12px;}
.foot p{color:#a7adb6;font-size:16px;max-width:46ch;}
.foot ul{list-style:none;margin:0 0 18px;padding:0;}
.foot li{padding:5px 0;}
.foot a{color:var(--ink-invert);text-decoration:none;border-bottom:1px solid var(--accent);padding-bottom:2px;}
.foot a:hover{border-bottom-color:var(--accent-2);}
.foot .cap{color:var(--accent-2);}
.foot__mail{font-family:var(--mono);font-size:14px;}

/* ---------- responsive ---------- */

@media (max-width:1000px){
  .hero__body{grid-column:4 / span 9;}
  .hero__frame{grid-column:4 / span 9;max-width:none;justify-self:stretch;}
  .scene__body,.scene__wide,.prose,.step__body{grid-column:3 / span 10;}
  .detail{grid-column:3 / span 10;}
  .detail-text{grid-column:3 / span 10;}
  .foot__left{grid-column:1 / span 7;}
  .foot__right{grid-column:8 / span 5;}
}

@media (max-width:720px){
  :root{--step:52px;--gap:16px;}
  body{font-size:17px;}
  .wrap{padding:0 18px;}
  .grid{grid-template-columns:1fr;}
  .hero{padding:40px 0 48px;}
  .hero__rail,.hero__body,.hero__frame,
  .scene__mark,.scene__body,.scene__wide,
  .detail,.detail-text,
  .step__num,.step__body,
  .prose,.aside-rail,
  .foot__left,.foot__right{grid-column:1 / -1;}
  h1{max-width:none;}
  .hero__rail{margin-bottom:32px;}
  .hero__frame{padding:20px;margin-top:28px;}
  .checklist{columns:1;}
  .scene__num{margin-bottom:14px;}
  .step__num{margin-bottom:6px;}
  .foot__right{margin-top:28px;}
  .masthead__in{gap:10px 18px;}
  .nav{gap:6px 16px;}
}