/* Surbaniokelo — specimen sheet */

:root{
  --bg:#eef0f2;
  --bg-alt:#dfe3e7;
  --bg-dark:#1b2733;
  --ink:#151a20;
  --ink-soft:#636d78;
  --ink-inv:#eef0f2;
  --accent:#2c4a7c;
  --accent-2:#a35a2a;
  --rule:#c3cad1;
  --serif:Georgia,'Times New Roman',serif;
  --sans:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.8;
  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,
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* ---------- Sheet ---------- */

.sheet{
  max-width:1120px;
  margin:40px auto;
  padding:0 clamp(18px,4vw,56px);
  background:var(--bg);
  border:1px solid var(--rule);
}

.grid12{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:0 24px;
}

/* ---------- Masthead / nav ---------- */

main{grid-column:1/-1;min-width:0}

.masthead{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 28px;
  padding:26px 0 18px;
  border-bottom:1px solid var(--rule);
}

.wordmark{
  font-family:var(--serif);
  font-size:20px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
}
.wordmark:hover{color:var(--accent)}

.nav ul{
  list-style:none;
  margin:0;padding:0;
  display:flex;flex-wrap:wrap;
  gap:6px 22px;
  font-size:14px;
}
.nav a{
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.nav a:hover,.nav a[aria-current="page"]{
  color:var(--accent);
  border-bottom-color:var(--accent);
}

/* ---------- Hero ---------- */

.hero{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:28px 24px;
  padding:56px 0 40px;
}

.hero h1{
  grid-column:1/9;
  margin:0;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(34px,5.2vw,58px);
  line-height:1.14;
  letter-spacing:-.01em;
}

.kicker{
  display:block;
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--accent-2);
  margin-bottom:18px;
}

.spec{
  border:1px solid var(--rule);
  padding:14px 16px;
  font-size:12px;
  line-height:1.7;
  color:var(--ink-soft);
}
.spec dl{margin:0}
.spec div{
  display:flex;
  gap:12px;
  justify-content:space-between;
  padding:5px 0;
  border-bottom:1px solid var(--rule);
}
.spec div:last-child{border-bottom:0}
.spec dt{
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--accent-2);
  flex:0 0 auto;
}
.spec dd{margin:0;text-align:right;color:var(--ink)}

.hero .spec{grid-column:9/13;align-self:start}

.hero-lede{
  grid-column:1/9;
  margin:0;
  font-size:19px;
  line-height:1.75;
  color:var(--ink);
}

/* ---------- Rule ---------- */

.rule{
  grid-column:1/-1;
  position:relative;
  height:1px;
  background:var(--rule);
  border:0;
  margin:0;
}
.rule::before,.rule::after{
  content:"";
  position:absolute;top:-5px;
  width:1px;height:11px;
  background:var(--accent-2);
}
.rule::before{left:0}
.rule::after{right:0}

/* ---------- Sections ---------- */

.band{grid-column:1/-1;padding:88px 0}
.band--tint{
  background:var(--bg-alt);
  margin:0 calc(-1 * clamp(18px,4vw,56px));
  padding:88px clamp(18px,4vw,56px);
}

.band > .inner{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:28px 24px;
}

.band h2{
  grid-column:1/9;
  margin:0;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(24px,2.6vw,30px);
  line-height:1.28;
}
.band h2 .num{
  display:block;
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--accent-2);
  margin-bottom:10px;
}

.col-text{grid-column:1/8}
.col-text > :first-child{margin-top:0}
.col-text > :last-child{margin-bottom:0}
.col-side{grid-column:9/13;align-self:start}

h3{
  font-family:var(--serif);
  font-weight:400;
  font-size:19px;
  line-height:1.4;
  margin:34px 0 10px;
}

p{margin:0 0 20px}

.list{
  margin:0 0 20px;
  padding-left:0;
  list-style:none;
}
.list li{
  position:relative;
  padding-left:26px;
  margin-bottom:12px;
}
.list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:12px;height:1px;
  background:var(--accent);
}
.list--num{counter-reset:step}
.list--num li{counter-increment:step}
.list--num li::before{
  content:counter(step,decimal-leading-zero);
  width:auto;height:auto;top:0;
  background:none;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--accent-2);
}

/* ---------- Figures ---------- */

.figure-row{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:start;
}
.figure-row figure{
  grid-column:1/6;
  margin:0;
  border:1px solid var(--rule);
  padding:8px;
}
.figure-row figcaption,
figcaption{
  font-size:12px;
  line-height:1.65;
  color:var(--ink-soft);
}
.figure-row figcaption{padding:10px 2px 2px}
.figure-note{grid-column:7/13;align-self:end}

/* ---------- Dark band ---------- */

.band--dark{
  background:var(--bg-dark);
  color:var(--ink-inv);
  margin:0 calc(-1 * clamp(18px,4vw,56px));
  padding:88px clamp(18px,4vw,56px);
}
.band--dark h2,.band--dark h3{color:var(--ink-inv)}
.band--dark p{color:#c8d0d8}
.band--dark .list li::before{background:#7f9ec9}
.band--dark a{color:#9db8dd}
.band--dark figure{
  grid-column:8/13;
  margin:0;
  border:1px solid #3a4a5b;
  padding:8px;
}
.band--dark figcaption{color:#8e9aa6}
.band--dark .col-text{grid-column:1/7}
.band--dark .spec{border-color:#3a4a5b;color:#8e9aa6}
.band--dark .spec div{border-bottom-color:#3a4a5b}
.band--dark .spec dd{color:var(--ink-inv)}

/* ---------- Footer ---------- */

.site-footer{
  max-width:1120px;
  margin:0 auto 56px;
  padding:0 clamp(18px,4vw,56px);
}
.footer-top{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 24px;
  align-items:baseline;
  padding-bottom:14px;
}
.footer-top .name{
  font-family:var(--serif);
  font-size:18px;
  letter-spacing:.06em;
  text-transform:uppercase;
}
.footer-bottom{
  border-top:1px solid var(--rule);
  padding-top:16px;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:16px 24px;
}
.footer-bottom nav{grid-column:1/8}
.footer-bottom ul{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;gap:6px 20px;
  font-size:14px;
}
.footer-bottom nav a{color:var(--ink);text-decoration:none;border-bottom:1px solid transparent}
.footer-bottom nav a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.footer-note{
  grid-column:9/13;
  font-size:12px;
  line-height:1.7;
  color:var(--ink-soft);
  margin:0;
}

/* ---------- Legal / about pages ---------- */

.page-head{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  padding:52px 0 34px;
}
.page-head h1{
  grid-column:1/9;
  margin:0;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(30px,4vw,44px);
  line-height:1.16;
}
.page-head .spec{grid-column:9/13}

.prose{grid-column:1/8;padding:44px 0 88px}
.prose > :first-child{margin-top:0}
.aside-stack{
  grid-column:9/13;
  padding:44px 0 88px;
  display:flex;
  flex-direction:column;
  gap:18px;
  align-self:start;
}

/* ---------- Responsive ---------- */

@media (max-width:900px){
  .hero h1,.hero .spec,.hero-lede,
  .band h2,.col-text,.col-side,
  .figure-row figure,.figure-note,
  .band--dark figure,.band--dark .col-text,
  .page-head h1,.page-head .spec,
  .prose,.aside-stack,
  .footer-bottom nav,.footer-note{
    grid-column:1/-1;
  }
  .figure-row figure,.band--dark figure{max-width:420px}
  .prose{padding-bottom:28px}
  .aside-stack{padding-top:0}
}

@media (max-width:640px){
  body{font-size:16px;line-height:1.75}
  .sheet{margin:16px auto;padding:0 18px}
  .band{padding:52px 0}
  .band--tint,.band--dark{margin:0 -18px;padding:52px 18px}
  .hero{padding:36px 0 28px}
  .page-head{padding:34px 0 24px}
  .masthead{flex-direction:column;align-items:flex-start}
  .nav ul{gap:6px 18px}
}