/* Trabruba — specimen sheet */

:root{
  --bg:#101a24;
  --bg-alt:#16232f;
  --bg-contrast:#e9edf0;
  --tx:#e3e9ee;
  --tx-dim:#8b9aa6;
  --tx-dark:#101a24;
  --ac:#3fb3ae;
  --ac2:#d8a15a;
  --line:rgba(139,154,166,.32);
  --line-dark:rgba(16,26,36,.28);
  --gap:88px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--bg);
  color:var(--tx);
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:18px;
  line-height:1.9;
  overflow-x:hidden;
}

h1,h2,h3{
  font-family:Georgia,'Times New Roman',serif;
  font-weight:400;
  line-height:1.3;
  margin:0;
  letter-spacing:.005em;
}

h1{font-size:clamp(28px,4.6vw,46px)}
h2{font-size:clamp(23px,3vw,31px)}
h3{font-size:clamp(19px,2.2vw,22px)}

p{margin:0 0 30px}
p:last-child{margin-bottom:0}

a{color:var(--ac);text-decoration:none;border-bottom:1px solid rgba(63,179,174,.45)}
a:hover{border-bottom-color:var(--ac)}
a:focus-visible{outline:2px solid var(--ac);outline-offset:3px;border-radius:1px}

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

/* ---------- shell ---------- */

.shell{
  max-width:1180px;
  margin:0 auto;
  padding:40px 20px 0;
}

.sheet{
  border:1px solid var(--line);
  background:var(--bg-alt);
  padding:44px 40px 56px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:28px 26px;
}

.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-5{grid-column:span 5}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-12{grid-column:1 / -1}

/* ---------- masthead ---------- */

.masthead{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px 28px;
  padding-bottom:22px;
  margin-bottom:34px;
  border-bottom:1px solid var(--line);
}

.wordmark{
  font-family:Georgia,'Times New Roman',serif;
  font-size:22px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--tx);
  border:0;
}
.wordmark:hover{color:var(--ac);border:0}

.masthead nav ul{
  list-style:none;
  margin:0;padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:8px 26px;
}
.masthead nav a{
  font-size:14px;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--tx-dim);
  border:0;
  padding-bottom:2px;
}
.masthead nav a:hover,
.masthead nav a[aria-current="page"]{
  color:var(--tx);
  border-bottom:1px solid var(--ac);
}

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

.hero-title{margin-bottom:16px}
.hero-lead{color:var(--tx-dim);font-size:19px;margin-bottom:0}

.specimen{
  border:1px solid var(--line);
  padding:20px 22px;
  font-size:14px;
  line-height:1.75;
  color:var(--tx-dim);
}
.specimen dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 16px}
.specimen dt{color:var(--ac2);letter-spacing:.08em;text-transform:uppercase;font-size:12px;padding-top:2px}
.specimen dd{margin:0;color:var(--tx)}
.specimen h2,.specimen h3{
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ac2);
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  margin-bottom:12px;
}

figure{margin:0}
figcaption{
  font-size:14px;
  line-height:1.65;
  color:var(--tx-dim);
}
.fig-frame{border:1px solid var(--line);padding:8px}
.fig-side{align-self:end}

/* ---------- rhythm ---------- */

.band{margin-top:var(--gap)}

.rule{
  position:relative;
  height:1px;
  background:var(--line);
  margin:var(--gap) 0;
  border:0;
}
.rule::before,.rule::after{
  content:"";
  position:absolute;
  top:-5px;
  width:1px;height:11px;
  background:var(--ac2);
}
.rule::before{left:0}
.rule::after{right:0}

.secnum{
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ac2);
  display:block;
  margin-bottom:10px;
}

/* ---------- lists ---------- */

ul.check,ol.steps{
  margin:0 0 30px;
  padding:0 0 0 22px;
}
ul.check{list-style:none;padding-left:0}
ul.check li{
  position:relative;
  padding-left:26px;
  margin-bottom:12px;
}
ul.check li::before{
  content:"";
  position:absolute;
  left:0;top:.85em;
  width:10px;height:1px;
  background:var(--ac);
}
ol.steps li{margin-bottom:12px;padding-left:6px}
ol.steps li::marker{color:var(--ac2);font-family:Georgia,serif}

/* ---------- contrast section ---------- */

.contrast{
  background:var(--bg-contrast);
  color:var(--tx-dark);
  border:1px solid rgba(16,26,36,.18);
  padding:52px 40px 56px;
  margin-top:var(--gap);
}
.contrast h2,.contrast h3{color:var(--tx-dark)}
.contrast .secnum{color:#9a6f2f}
.contrast figcaption{color:#4d5c68}
.contrast .fig-frame{border-color:var(--line-dark)}
.contrast .specimen{border-color:var(--line-dark);color:#4d5c68}
.contrast .specimen dd{color:var(--tx-dark)}
.contrast .specimen h3{color:#9a6f2f}
.contrast a{color:#1a7d79;border-bottom-color:rgba(26,125,121,.45)}
.contrast ul.check li::before{background:#1a7d79}

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

.stack{display:flex;flex-direction:column;gap:20px}

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

.site-footer{
  max-width:1180px;
  margin:0 auto;
  padding:56px 20px 60px;
  margin-top:64px;
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:baseline;
  gap:10px 24px;
  padding-bottom:18px;
}
.footer-name{
  font-family:Georgia,'Times New Roman',serif;
  font-size:19px;
  letter-spacing:.2em;
  text-transform:uppercase;
}
.footer-line{height:1px;background:var(--line);margin-bottom:20px}
.footer-bottom{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:18px 26px;
  align-items:start;
}
.footer-nav{grid-column:span 7}
.footer-nav ul{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;gap:6px 24px;
}
.footer-nav a{
  font-size:14px;
  letter-spacing:.07em;
  color:var(--tx-dim);
  border:0;
}
.footer-nav a:hover{color:var(--ac)}
.footer-note{
  grid-column:span 5;
  font-size:14px;
  line-height:1.7;
  color:var(--tx-dim);
  margin:0;
}

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

@media (max-width:900px){
  :root{--gap:60px}
  .sheet{padding:32px 24px 40px}
  .contrast{padding:38px 24px 42px}
  .col-7,.col-8,.col-5,.col-4,.col-6{grid-column:1 / -1}
  .grid{gap:24px}
}

@media (max-width:640px){
  :root{--gap:52px}
  body{font-size:17px;line-height:1.85}
  .shell{padding:24px 14px 0}
  .sheet{padding:26px 18px 34px}
  .contrast{padding:30px 18px 34px}
  .masthead{gap:12px}
  .masthead nav ul{gap:6px 18px}
  .footer-bottom{grid-template-columns:1fr}
  .footer-nav,.footer-note{grid-column:1 / -1}
  .site-footer{padding:40px 14px 48px}
}