/* Zero Friktion — shared blog styles */
:root{
  --paper: #f4f1ea;
  --paper-2: #ece8de;
  --paper-rgb: 244,241,234;
  --ink: #0e0e0c;
  --ink-2: #1a1a18;
  --ink-rgb: 14,14,12;
  --ink-soft: #5a5852;
  --rule: #d8d2c2;
  --vermilion: #ff3d00;
  --vermilion-soft: #ffe4d8;
  --grain-mult: multiply;
  --grain-opacity: 0.025;
  --serif: "Fraunces", ui-serif, Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;
  --sans: "Geist", -apple-system, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
html[data-theme="night"]{
  --paper: #0d0d0b;
  --paper-2: #161614;
  --paper-rgb: 13,13,11;
  --ink: #f1ece0;
  --ink-2: #e6e0d2;
  --ink-rgb: 241,236,224;
  --ink-soft: #8a857a;
  --rule: #2a2724;
  --vermilion: #ff5421;
  --vermilion-soft: #3a1808;
  --grain-mult: screen;
  --grain-opacity: 0.04;
  color-scheme: dark;
}
html, body{ transition: background-color .35s ease, color .35s ease; }
*{ box-sizing: border-box; }
html, body{ margin:0; padding:0; }
body{
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before{
  content:""; position: fixed; inset:0;
  pointer-events:none; z-index: 100;
  background-image: radial-gradient(rgba(var(--ink-rgb),0.35) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-mult);
}
::selection{ background: var(--vermilion); color: var(--paper); }
a{ color: inherit; text-decoration: none; }
button{ font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
.mono{ font-family: var(--mono); letter-spacing: 0.02em; }
.serif{ font-family: var(--serif); font-optical-sizing: auto; }

/* topbar */
.topbar{
  position: sticky; top:0; z-index: 50;
  background: rgba(var(--paper-rgb),0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.wrap{ max-width: 1100px; margin: 0 auto; padding: 0 40px; position: relative; }
@media (max-width: 720px){ .wrap{ padding: 0 20px; } }
.topbar-inner{
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 32px; height: 64px;
}
.brand{
  display: flex; align-items: center; gap: 10px;
  font-family: var(--serif); font-weight: 600;
  font-size: 18px; letter-spacing: -0.01em;
}
.brand .dot{
  width: 10px; height: 10px; border-radius: 999px;
  background: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(255,61,0,0.18);
}
.nav{
  display: flex; gap: 28px; justify-content: center;
  font-family: var(--mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.nav a{ position: relative; padding: 4px 0; }
.nav a:hover{ color: var(--ink); }
.nav a::after{
  content:""; position:absolute; left:0; right:100%; bottom:-2px;
  height:1px; background: var(--vermilion);
  transition: right .25s ease;
}
.nav a:hover::after, .nav a.active::after{ right:0; }
.nav .num{ color: var(--vermilion); margin-right: 6px; }
@media (max-width: 900px){ .nav{ display: none; } }
.cta{
  font-family: var(--mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.14em;
  padding: 10px 16px;
  background: var(--ink); color: var(--paper);
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
  transition: transform .2s ease, background .2s ease;
}
.cta:hover{ background: var(--vermilion); transform: translateY(-1px); }

/* page heading */
.page-head{
  padding: 80px 0 40px;
  border-bottom: 1px solid var(--rule);
}
.page-meta{
  display: flex; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--ink-soft);
  margin-bottom: 28px;
}
.page-meta .v{ color: var(--vermilion); }
.page-title{
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  margin: 0;
  font-variation-settings: "opsz" 144, "SOFT" 50;
  text-wrap: balance;
}
.page-title em{ font-style: italic; color: var(--vermilion); font-weight: 400; }
.page-lede{
  margin: 24px 0 0;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.4;
  color: var(--ink-2);
  max-width: 56ch;
}

/* index list */
.posts{
  border-top: 1px solid var(--rule);
}
.post-row{
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  transition: padding .2s ease;
}
.post-row:hover{ padding-left: 12px; padding-right: 12px; }
.post-row:hover h2{ color: var(--vermilion); }
.post-date{
  font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--ink-soft);
}
.post-date .v{ color: var(--vermilion); }
.post-row h2{
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  font-variation-settings: "opsz" 60;
  transition: color .2s ease;
}
.post-row p{
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 60ch;
}
.post-tag{
  font-family: var(--mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.16em;
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
  white-space: nowrap;
}
@media (max-width: 720px){
  .post-row{ grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .post-tag{ justify-self: start; }
}

/* article */
.article{
  padding: 60px 0 100px;
}
.article-wrap{
  max-width: 720px; margin: 0 auto; padding: 0 40px;
}
@media (max-width: 720px){ .article-wrap{ padding: 0 20px; } }
.article h1{
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(40px, 5.5vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  font-variation-settings: "opsz" 144;
  text-wrap: balance;
}
.article h1 em{ font-style: italic; color: var(--vermilion); font-weight: 400; }
.article-meta{
  display: flex; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.16em;
  color: var(--ink-soft);
  padding-bottom: 28px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--rule);
}
.article-meta .v{ color: var(--vermilion); }
.article-body{
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-2);
}
.article-body p{ margin: 0 0 22px; }
.article-body p.lede{
  font-family: var(--serif);
  font-weight: 300;
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink);
}
.article-body h2{
  font-family: var(--serif);
  font-weight: 400;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 48px 0 16px;
  color: var(--ink);
}
.article-body h3{
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 32px 0 12px;
  color: var(--ink);
}
.article-body strong{ color: var(--ink); font-weight: 600; }
.article-body em{ font-family: var(--serif); font-style: italic; }
.article-body a{
  color: var(--ink);
  border-bottom: 1px solid var(--vermilion);
  padding-bottom: 1px;
}
.article-body a:hover{ color: var(--vermilion); }
.article-body ul, .article-body ol{
  margin: 0 0 22px; padding-left: 24px;
}
.article-body li{ margin-bottom: 10px; }
.article-body blockquote{
  margin: 28px 0;
  padding: 8px 0 8px 22px;
  border-left: 2px solid var(--vermilion);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 22px;
  line-height: 1.4;
  color: var(--ink);
}
.article-body code{
  font-family: var(--mono);
  font-size: 14px;
  background: var(--paper-2);
  padding: 2px 6px;
  border-radius: 4px;
}
.article-body hr{
  border: 0; border-top: 1px solid var(--rule);
  margin: 48px 0;
}
.article-body .key-takeaway{
  margin: 32px 0;
  padding: 22px 24px;
  background: var(--paper-2);
  border-left: 3px solid var(--vermilion);
  border-radius: 4px;
}
.article-body .key-takeaway .label{
  font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--vermilion);
  margin-bottom: 8px;
}
.article-body .key-takeaway p{ margin: 0; font-size: 16px; }

/* article footer / cta */
.article-cta{
  margin-top: 60px;
  padding: 36px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
@media (max-width: 720px){ .article-cta{ grid-template-columns: 1fr; } }
.article-cta h3{
  font-family: var(--serif);
  font-weight: 300;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.article-cta h3 em{ font-style: italic; color: var(--vermilion); font-weight: 400; }
.article-cta p{
  margin: 0;
  font-size: 14px;
  color: rgba(244,241,234,0.7);
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.article-cta .btn{
  background: var(--vermilion); color: var(--ink);
  font-family: var(--mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.14em;
  padding: 14px 22px; border-radius: 999px;
  white-space: nowrap;
  transition: background .2s ease, transform .2s ease;
}
.article-cta .btn:hover{ background: var(--paper); transform: translateY(-1px); }

/* prev/next */
.article-nav{
  margin-top: 40px;
  display: flex; justify-content: space-between; gap: 24px;
  border-top: 1px solid var(--rule);
  padding-top: 24px;
  font-family: var(--mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.article-nav a:hover{ color: var(--vermilion); }

/* footer */
.footer{
  background: var(--ink); color: var(--paper);
  padding: 60px 0 40px;
  margin-top: 100px;
}
html[data-theme="night"] .footer{ background: #050504; }
.footer-row{
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  font-family: var(--mono); font-size: 12px;
  color: rgba(244,241,234,0.55);
}
@media (max-width: 720px){ .footer-row{ grid-template-columns: 1fr 1fr; } }
.footer h6{
  margin: 0 0 14px;
  font-size: 11px; color: rgba(244,241,234,0.4);
  text-transform: uppercase; letter-spacing: 0.18em;
  font-weight: 400;
}
.footer ul{ list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer a:hover{ color: var(--vermilion); }
.footer .signature{
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 26px;
  color: var(--paper);
  line-height: 1.1;
  margin-bottom: 14px;
}
.footer .legal{
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(244,241,234,0.12);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.16em;
  color: rgba(244,241,234,0.4);
}