/* Grinetri — book-spine editorial */

:root{
  --paper:#f4f2ed;
  --paper-alt:#e6e3dc;
  --ink:#16151a;
  --ink-soft:#6d6a63;
  --blue:#1f3fa8;
  --red:#c0452e;
  --rhythm:76px;
  --spine:56px;
}

*{box-sizing:border-box;}

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Georgia,'Times New Roman',serif;
  font-size:18px;
  line-height:1.7;
  overflow-x:hidden;
}

h1,h2,h3,.label,.nav a,.kicker,.folio{
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}

a{color:var(--blue);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(--blue);outline-offset:3px;}

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

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

.sheet{
  max-width:1180px;
  margin:0 auto;
  padding:0 22px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:22px;
}

/* ---------- spine ---------- */

.spine{
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  width:var(--spine);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:11px;
  padding-top:34px;
  pointer-events:none;
}
.spine i{
  display:block;
  width:18px;
  height:2px;
  background:var(--blue);
}
.spine i:nth-child(3n){background:var(--red);width:11px;}

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

.topbar{
  border-bottom:1px solid var(--ink);
  background:var(--paper);
}
.topbar .sheet{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 26px;
  padding-top:18px;
  padding-bottom:16px;
}
.wordmark{
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-weight:800;
  font-size:20px;
  letter-spacing:-0.02em;
  color:var(--ink);
  text-decoration:none;
}
.wordmark:hover{text-decoration:none;color:var(--blue);}
.nav ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
}
.nav a{
  font-size:13.5px;
  font-weight:600;
  letter-spacing:0.05em;
  text-transform:uppercase;
  color:var(--ink);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:2px solid transparent;
}
.nav a:hover,.nav a[aria-current="page"]{border-bottom-color:var(--blue);color:var(--blue);}

/* ---------- section frame ---------- */

.band{
  position:relative;
  padding:var(--rhythm) 0;
  border-bottom:1px solid rgba(22,21,26,.14);
}
.band--alt{background:var(--paper-alt);}
.band--dark{background:var(--ink);color:var(--paper);border-bottom:none;}
.band--dark .folio,.band--dark .cap{color:#b6b2a9;}
.band--dark .rule{background:rgba(244,242,237,.3);}
.band--dark a{color:#9fb4ef;}
.band--dark .spine i{background:#9fb4ef;}
.band--dark .spine i:nth-child(3n){background:var(--red);}

.folio{
  grid-column:1 / span 12;
  font-size:11.5px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--ink-soft);
  margin:0 0 8px;
}
.folio b{color:var(--red);font-weight:700;margin-right:10px;}
.rule{
  grid-column:1 / span 12;
  height:1px;
  background:rgba(22,21,26,.28);
  margin-bottom:34px;
}

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

.hero{
  position:relative;
  padding:66px 0 var(--rhythm);
}
.hero .sheet{padding-left:calc(22px + var(--spine));}
.hero h1{
  grid-column:1 / span 10;
  margin:0;
  font-size:clamp(2.5rem,6.2vw,4.4rem);
  font-weight:800;
  line-height:0.98;
  letter-spacing:-0.035em;
  max-width:16ch;
}
.hero .dbl{
  grid-column:1 / span 8;
  margin:30px 0 26px;
  border-top:3px solid var(--ink);
  border-bottom:1px solid var(--ink);
  height:5px;
}
.hero .lede{
  grid-column:1 / span 6;
  margin:0;
  font-size:20.5px;
  line-height:1.62;
}
.hero .kicker{
  grid-column:1 / span 10;
  margin:0 0 20px;
  font-size:12px;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--red);
  font-weight:700;
}

.figmain{
  grid-column:7 / span 6;
  margin:44px 0 0;
}
.figmain img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.cap{
  margin:10px 0 0;
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:12.5px;
  line-height:1.5;
  color:var(--ink-soft);
  text-align:left;
}

/* ---------- text blocks ---------- */

.col{grid-column:2 / span 6;}
.col-wide{grid-column:2 / span 8;}
.col h2{
  margin:0 0 18px;
  font-size:clamp(1.55rem,3vw,2.1rem);
  font-weight:800;
  letter-spacing:-0.025em;
  line-height:1.08;
}
.col-wide h2{
  margin:0 0 18px;
  font-size:clamp(1.55rem,3vw,2.1rem);
  font-weight:800;
  letter-spacing:-0.025em;
  line-height:1.08;
}
h3{
  margin:34px 0 10px;
  font-size:1.12rem;
  font-weight:700;
  letter-spacing:-0.01em;
}
p{margin:0 0 18px;}
.intro{font-size:20px;line-height:1.65;}

ul.marks,ol.steps{margin:0 0 20px;padding:0;list-style:none;}
ul.marks li{position:relative;padding-left:26px;margin-bottom:12px;}
ul.marks li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:13px;height:2px;background:var(--blue);
}
ol.steps{counter-reset:s;}
ol.steps li{position:relative;padding-left:36px;margin-bottom:14px;counter-increment:s;}
ol.steps li::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;left:0;top:.15em;
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:12.5px;font-weight:700;color:var(--red);letter-spacing:.06em;
}

.sep{
  grid-column:2 / span 6;
  display:flex;justify-content:center;gap:9px;
  margin:36px 0;
}
.sep span{width:16px;height:2px;background:var(--red);}
.sep span:nth-child(2){background:var(--blue);}

.note{
  grid-column:2 / span 6;
  border-left:2px solid var(--blue);
  padding:2px 0 2px 20px;
  color:var(--ink-soft);
  font-size:16.5px;
}
.note p:last-child{margin-bottom:0;}

/* ---------- dark section with detail image ---------- */

.figdetail{grid-column:2 / span 4;margin:0;}
.figdetail img{width:100%;aspect-ratio:4/5;object-fit:cover;}
.darktext{grid-column:7 / span 6;}
.darktext h2{
  margin:0 0 18px;
  font-size:clamp(1.55rem,3vw,2.1rem);
  font-weight:800;letter-spacing:-0.025em;line-height:1.08;
}

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

.dropcap::first-letter{
  float:left;
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:3.5em;
  line-height:.82;
  font-weight:800;
  color:var(--blue);
  margin:6px 12px 0 0;
}

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

.site-foot{
  background:var(--paper);
  border-top:2px solid var(--ink);
  padding:52px 0 60px;
  text-align:center;
}
.site-foot .name{
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-weight:800;font-size:19px;letter-spacing:-0.02em;
  margin:0 0 16px;
}
.site-foot nav ul{
  list-style:none;margin:0 0 18px;padding:0;
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:8px 0;
}
.site-foot nav li + li{border-left:1px solid rgba(22,21,26,.32);}
.site-foot nav a{
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:13px;letter-spacing:.04em;padding:0 14px;
  color:var(--ink);text-decoration:none;
}
.site-foot nav a:hover{color:var(--blue);text-decoration:underline;}
.site-foot .mail{margin:0 0 12px;font-size:16.5px;}
.site-foot .fine{
  margin:0 auto;max-width:56ch;
  font-family:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  font-size:12.5px;line-height:1.6;color:var(--ink-soft);
}
.foot-marks{display:flex;justify-content:center;gap:9px;margin:0 0 26px;}
.foot-marks span{width:16px;height:2px;background:var(--blue);}
.foot-marks span:nth-child(2){background:var(--red);}

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

@media (max-width:900px){
  :root{--rhythm:46px;--spine:34px;}
  body{font-size:17px;}
  .hero{padding-top:44px;}
  .hero .sheet{padding-left:calc(18px + var(--spine));}
  .sheet{padding:0 18px;}
  .grid{column-gap:16px;}
  .hero h1,.hero .lede,.hero .dbl,.hero .kicker{grid-column:1 / span 12;}
  .hero .lede{font-size:18.5px;}
  .figmain{grid-column:1 / span 12;margin-top:32px;}
  .col,.col-wide,.sep,.note,.figdetail,.darktext{grid-column:1 / span 12;}
  .darktext{margin-top:28px;}
  .figdetail img{aspect-ratio:4/5;}
  .spine{display:none;}
  .band .folio,.band .rule{grid-column:1 / span 12;}
  .intro{font-size:18.5px;}
}

@media (max-width:560px){
  .topbar .sheet{flex-direction:column;align-items:flex-start;}
  .nav ul{gap:6px 16px;}
  .site-foot nav ul{flex-direction:column;}
  .site-foot nav li + li{border-left:none;}
}