/* Tretranda — stone-courses */

:root{
  --bg:#f4ece0;
  --bg-alt:#e8dbc7;
  --bg-mid:#ddcdb4;
  --bg-dark:#33231a;
  --ink:#2a2119;
  --ink-soft:#7d6f5c;
  --ink-inv:#f4ece0;
  --accent:#b0512c;
  --accent2:#37596b;
  --mono:ui-monospace,Consolas,"Liberation Mono",monospace;
  --sans:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --pad-y:88px;
  --pad-x:52px;
  --maxw:1180px;
}

*{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:1.75;
  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}

/* ---------- layers & grid ---------- */

.layer{padding:var(--pad-y) var(--pad-x)}
.layer--thin{padding-top:20px;padding-bottom:20px}
.layer--alt{background:var(--bg-alt)}
.layer--mid{background:var(--bg-mid)}
.layer--dark{background:var(--bg-dark);color:var(--ink-inv)}
.layer--dark .lbl{color:#c9a68c}
.layer--dark a{color:#e0a184}

.grid{
  max-width:var(--maxw);
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:24px;
}

/* stepped rhythm: 0,1,2,3 */
.col6{grid-column:1 / span 6}
.step-0 .col6{grid-column:1 / span 6}
.step-1 .col6{grid-column:2 / span 6}
.step-2 .col6{grid-column:3 / span 6}
.step-3 .col6{grid-column:4 / span 6}

.col7{grid-column:1 / span 7}
.step-1 .col7{grid-column:2 / span 7}
.step-2 .col7{grid-column:3 / span 7}
.step-3 .col7{grid-column:4 / span 7}

.col12{grid-column:1 / span 12}

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

h1,h2,h3{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.08em;
  font-weight:600;
  margin:0 0 .6em;
  line-height:1.25;
}

h1{font-size:clamp(27px,4.4vw,50px);letter-spacing:.05em;line-height:1.15;margin:0}
h2{font-size:clamp(18px,2.2vw,25px)}
h3{font-size:clamp(15px,1.5vw,17px);letter-spacing:.12em;color:var(--ink)}
.layer--dark h3{color:var(--ink-inv)}

p{margin:0 0 1.15em;max-width:34em}
p:last-child{margin-bottom:0}

.lbl{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.18em;
  font-size:12px;
  color:var(--accent2);
  display:block;
  margin-bottom:18px;
}

.soft{color:var(--ink-soft)}

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

.hero-nav{background:var(--bg-alt)}
.hero-main{
  background:var(--bg);
  min-height:44vh;
  display:flex;
  align-items:flex-end;
  padding-top:96px;
  padding-bottom:56px;
}
.hero-main .grid{width:100%}
.hero-main h1{grid-column:1 / span 9}
.hero-base{background:var(--bg-mid);padding-top:64px;padding-bottom:64px}

.topics{
  grid-column:8 / span 5;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  text-transform:uppercase;
  line-height:2.1;
  color:var(--ink);
}
.topics li{padding-left:20px;position:relative}
.topics li::before{content:"";position:absolute;left:0;top:.95em;width:10px;height:2px;background:var(--accent)}

/* ---------- site nav ---------- */

.nav{
  max-width:var(--maxw);
  margin:0 auto;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 26px;
}
.brand{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.22em;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  text-decoration:none;
  margin-right:auto;
}
.nav ul{display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;margin:0;padding:0}
.nav a{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--accent);color:var(--accent)}

/* ---------- figures ---------- */

.fig-main{background:var(--bg-alt);padding:var(--pad-y) var(--pad-x)}
.fig-main figure{grid-column:4 / span 9;margin:0}
.fig-main img{width:100%;aspect-ratio:3/2;object-fit:cover}
figcaption{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-soft);
  margin-top:14px;
  max-width:40em;
  line-height:1.7;
}
.layer--dark figcaption{color:#b39d86}

.split{align-items:start}
.split figure{grid-column:1 / span 4;margin:0}
.split figure img{width:100%;aspect-ratio:4/5;object-fit:cover}
.split .split-text{grid-column:6 / span 6}

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

ul.body-list,ol.body-list{margin:0 0 1.2em;padding-left:0;list-style:none;max-width:34em}
ul.body-list li{position:relative;padding-left:26px;margin-bottom:.6em}
ul.body-list li::before{content:"";position:absolute;left:0;top:.85em;width:12px;height:2px;background:var(--accent)}
ol.body-list{counter-reset:s}
ol.body-list li{position:relative;padding-left:34px;margin-bottom:.6em;counter-increment:s}
ol.body-list li::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--accent2);
}
.layer--dark ol.body-list li::before{color:#8fb3c4}

dl.terms{margin:0;max-width:36em}
dl.terms dt{font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em;font-size:13px;margin-top:1.4em;color:var(--accent2)}
dl.terms dt:first-child{margin-top:0}
dl.terms dd{margin:.35em 0 0}

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

.site-footer{background:var(--bg-dark);color:var(--ink-inv);padding:64px var(--pad-x) 56px;margin:0}
.foot-name{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.16em;
  font-size:clamp(34px,9vw,104px);
  line-height:1;
  margin:0 0 48px;
  color:var(--ink-inv);
  display:block;
}
.foot-cols{
  max-width:var(--maxw);
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:36px;
}
.foot-col h2{font-size:12px;letter-spacing:.18em;color:#c9a68c;margin:0 0 14px;padding-top:14px;border-top:2px solid var(--accent)}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:.4em}
.foot-col a{color:var(--ink-inv);text-decoration:none;border-bottom:1px solid rgba(244,236,224,.35)}
.foot-col a:hover{border-bottom-color:var(--accent)}
.foot-col p{font-size:15px;color:#cbbba6;margin:0}
.foot-note{max-width:var(--maxw);margin:44px auto 0;font-size:13px;color:#9a8974;font-family:var(--mono);letter-spacing:.06em}

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

.doc p,.doc li{max-width:36em}

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

@media (max-width:1000px){
  :root{--pad-x:32px;--pad-y:64px}
  .grid{column-gap:18px}
  .fig-main figure{grid-column:2 / span 11}
  .split figure{grid-column:1 / span 5}
  .split .split-text{grid-column:7 / span 6}
  .hero-main h1{grid-column:1 / span 11}
  .topics{grid-column:7 / span 6}
}

@media (max-width:760px){
  :root{--pad-x:20px;--pad-y:48px}
  body{font-size:16px}
  .grid{grid-template-columns:1fr;column-gap:0;row-gap:28px}
  .col6,.col7,.col12,
  .step-1 .col6,.step-2 .col6,.step-3 .col6,
  .step-1 .col7,.step-2 .col7,.step-3 .col7,
  .hero-main h1,.topics,
  .fig-main figure,.split figure,.split .split-text{grid-column:1 / -1}
  .hero-main{min-height:auto;padding-top:56px}
  .foot-cols{grid-template-columns:1fr;gap:28px}
  .nav{gap:12px 18px}
  .brand{margin-right:0;width:100%}
  p{max-width:none}
}