:root{
  --bg:#f1e9dc;
  --bg-alt:#e5d8c4;
  --bg-dark:#3a2a1d;
  --ink:#2a2018;
  --ink-2:#7a6a57;
  --ink-inv:#f1e9dc;
  --accent:#9c5a2c;
  --accent-2:#59705b;
  --sans:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --serif:Georgia,'Times New Roman',serif;
}

*{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;
}

.wrap{
  max-width:1200px;
  margin:0 auto;
  padding:0 28px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:24px;
}

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

h1,h2,h3,.nav a,.topics li,.figcap,.secnum,.footlogo{font-family:var(--sans)}

h1{
  grid-column:1 / 8;
  margin:0;
  font-size:clamp(38px,6.4vw,74px);
  line-height:.98;
  letter-spacing:-.035em;
  font-weight:800;
}
h1 .l1{display:block;margin-left:28.5%}
h1 .l2{display:block}

h2{
  margin:0 0 18px;
  font-size:clamp(24px,2.6vw,31px);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:700;
}

h3{
  margin:32px 0 10px;
  font-size:19px;
  line-height:1.25;
  letter-spacing:-.01em;
  font-weight:700;
}

p{margin:0 0 20px}
p:last-child{margin-bottom:0}

.lead{font-size:20px}

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

.secnum{
  display:block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent-2);
  margin-bottom:10px;
  font-weight:600;
}

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

.site-head{padding-top:26px}

.nav ul{
  grid-column:1 / 13;
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:34px;
}
.nav a{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--ink);
  text-decoration:none;
}
.nav a:hover,.nav a[aria-current="page"]{color:var(--accent)}
.nav a[aria-current="page"]{text-decoration:underline;text-underline-offset:6px;text-decoration-color:var(--accent)}

.nav-rule{
  grid-column:1 / 6;
  height:1px;
  background:var(--accent);
  margin:18px 0 0;
}

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

.hero{margin-top:56px}

.topics{
  grid-column:10 / 13;
  list-style:none;
  margin:6px 0 0;
  padding:0;
  font-size:13px;
  line-height:1.5;
  color:var(--ink-2);
  align-self:end;
}
.topics li{
  border-top:1px solid rgba(122,106,87,.45);
  padding:9px 0;
  letter-spacing:.02em;
}
.topics li:last-child{border-bottom:1px solid rgba(122,106,87,.45)}

.hero-text{grid-column:1 / 7;margin-top:40px}

/* ---------- main image ---------- */

.mainfig{margin:56px 0 0}
.mainfig .imgbox{
  grid-column:8 / 13;
  padding:8px;
  border:1px solid var(--accent);
}
.mainfig img{display:block;width:100%;height:auto}
.figcap{
  grid-column:2 / 5;
  align-self:end;
  font-size:13px;
  line-height:1.5;
  color:var(--ink-2);
  margin:0 0 6px;
}

/* ---------- sections ---------- */

.section{margin-top:64px}
.section .col,.band .col{grid-column:1 / 7}
.section.shift .col{grid-column:4 / 10}

.band{
  background:var(--bg-alt);
  padding:56px 0;
  margin-top:64px;
}

.rule{
  grid-column:1 / 3;
  height:1px;
  background:var(--accent);
  margin-bottom:26px;
}
.section.shift .rule{grid-column:4 / 6}
.band .rule{margin-bottom:26px}

ul.checks,ol.steps{
  margin:0 0 20px;
  padding-left:0;
  list-style:none;
}
ul.checks li,ol.steps li{
  position:relative;
  padding-left:22px;
  margin-bottom:9px;
}
ul.checks li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:9px;
  height:1px;
  background:var(--accent);
}
ol.steps{counter-reset:s}
ol.steps li{counter-increment:s;padding-left:32px}
ol.steps li::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.05em;
  font-family:var(--sans);
  font-size:12px;
  color:var(--accent-2);
  letter-spacing:.06em;
}

/* ---------- dark section ---------- */

.dark{
  background:var(--bg-dark);
  color:var(--ink-inv);
  padding:72px 0;
  margin-top:64px;
}
.dark h2,.dark h3{color:var(--ink-inv)}
.dark .secnum{color:#9fb0a0}
.dark .rule{background:var(--accent);grid-column:2 / 4}
.dark a{color:#d79a63}
.dark .darkfig{grid-column:2 / 6;margin:0}
.dark .darkfig img{display:block;width:100%;height:auto}
.dark .darkcap{
  font-size:12px;
  line-height:1.5;
  color:#b6a48c;
  margin-top:10px;
}
.dark .darktext{grid-column:7 / 12}
.dark ul.checks li::before{background:#d79a63}

/* ---------- about ---------- */

.about-col{grid-column:1 / 7}
.about-block{margin-top:56px}
.about-block:first-of-type{margin-top:0}
.about-block h2{position:relative;padding-left:36px}
.about-block h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:24px;
  height:1px;
  background:var(--accent);
}

.page-head{margin-top:56px}
.page-head h1{grid-column:1 / 9}
.page-head h1 .l1{margin-left:0}
.page-intro{grid-column:1 / 7;margin-top:24px;color:var(--ink-2)}

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

.site-foot{margin-top:88px;padding-bottom:56px}
.foot-rule{
  grid-column:1 / 6;
  height:1px;
  background:var(--accent);
  margin-bottom:28px;
}
.foot-a{grid-column:1 / 6}
.foot-b{grid-column:6 / 9}
.foot-c{grid-column:9 / 13}

.footlogo{
  font-size:20px;
  font-weight:800;
  letter-spacing:-.02em;
  margin:0 0 8px;
}
.site-foot p,.site-foot ul{font-size:14px;line-height:1.6;color:var(--ink-2)}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin-bottom:7px}
.site-foot a{color:var(--ink-2)}
.site-foot a:hover{color:var(--accent)}

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

@media (max-width:900px){
  body{font-size:17px}
  .grid{column-gap:16px}
  h1{grid-column:1 / 13}
  h1 .l1{margin-left:0}
  .topics{grid-column:1 / 13;margin-top:28px}
  .hero-text,.section .col,.band .col,.section.shift .col,.about-col,.page-head h1,.page-intro{grid-column:1 / 13}
  .rule,.section.shift .rule,.dark .rule{grid-column:1 / 4}
  .mainfig .imgbox{grid-column:1 / 13}
  .figcap{grid-column:1 / 13;margin:14px 0 0}
  .dark .darkfig{grid-column:1 / 13}
  .dark .darktext{grid-column:1 / 13;margin-top:32px}
  .section,.band,.dark{margin-top:40px}
  .band{padding:40px 0}
  .dark{padding:48px 0}
  .hero{margin-top:40px}
  .mainfig{margin-top:40px}
  .foot-a,.foot-b,.foot-c{grid-column:1 / 13}
  .foot-b,.foot-c{margin-top:26px}
  .foot-rule{grid-column:1 / 9}
  .site-foot{margin-top:56px}
  .nav ul{gap:18px 22px}
  .about-block{margin-top:44px}
}

@media (max-width:520px){
  .wrap{padding:0 20px}
  .dark .darkfig{grid-column:1 / 13}
}