/* ============================================================
   skillsforai.pro — guide pages shared styles
   ============================================================ */

:root{
  --bg:#fafaf7;
  --bg-2:#f1f1ec;
  --card:#ffffff;
  --ink:#0a0a0a;
  --ink-2:#2a2a28;
  --ink-3:#5a5a55;
  --rule:#0a0a0a14;
  --rule-strong:#0a0a0a26;
  --accent:#c4ff3d;
  --accent-2:#0052ff;
  --hot:#e63d1f;
  --plum:#7a3dff;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;font-feature-settings:"ss01","cv11";
}
::selection{background:var(--accent);color:var(--ink)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
:focus{outline:none}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:3px;border-radius:4px}

.skip{
  position:absolute;left:-9999px;top:8px;
  background:var(--ink);color:var(--bg);
  padding:10px 14px;border-radius:8px;font-size:14px;font-weight:600;z-index:100;
}
.skip:focus{left:14px}

.mono{font-family:var(--mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;color:var(--ink-3)}

/* ---------- AFFIL STRIP ---------- */
.affil-strip{
  background:var(--ink);color:var(--bg);
  text-align:center;font-size:12px;font-weight:500;
  padding:7px 24px;letter-spacing:0.01em;
}
.affil-strip strong{color:var(--accent)}

/* ---------- NAV ---------- */
nav.top{
  position:sticky;top:0;z-index:30;
  background:color-mix(in oklab,var(--bg) 92%,transparent);
  border-bottom:1px solid var(--rule);
  backdrop-filter:blur(8px);
}
.nav-in{
  max-width:1200px;margin:0 auto;padding:14px 28px;
  display:flex;align-items:center;gap:28px;
}
.logo{font-weight:700;font-size:17px;letter-spacing:-0.02em;display:inline-flex;align-items:center;gap:9px}
.logo .blip{
  width:9px;height:9px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 3px color-mix(in oklab,var(--accent) 30%,transparent);
}
.logo .dim{color:var(--ink-3);font-weight:500}
.nav-in .links{display:flex;gap:24px;font-size:14px;color:var(--ink-2);font-weight:500}
.nav-in .links a{position:relative;padding:4px 0}
.nav-in .links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease-out);
}
.nav-in .links a:hover{color:var(--ink)}
.nav-in .links a:hover::after{transform:scaleX(1)}
.nav-in .links a[aria-current]::after{transform:scaleX(1)}
.nav-in .right{margin-left:auto;display:flex;align-items:center;gap:12px}
.pill-btn{
  font-family:inherit;font-size:13px;font-weight:600;padding:9px 16px;border-radius:999px;
  background:var(--ink);color:var(--bg);border:0;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
  transition:transform .25s var(--ease),background .25s;
}
.pill-btn:hover{transform:translateY(-1px);background:#1a1a18}
.pill-btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--rule-strong)}
.pill-btn.ghost:hover{background:var(--bg-2);border-color:var(--ink)}
.pill-btn .arr{transition:transform .25s var(--ease)}
.pill-btn:hover .arr{transform:translateX(3px)}

/* ---------- LAYOUT ---------- */
main{max-width:1200px;margin:0 auto;padding:0 28px}

/* breadcrumb */
.crumb{
  display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;
  letter-spacing:0.06em;text-transform:uppercase;color:var(--ink-3);
  padding:28px 0 8px;
}
.crumb a:hover{color:var(--ink)}
.crumb .sep{opacity:.5}

/* ---------- GUIDE HERO ---------- */
.guide-hero{padding:24px 0 40px;border-bottom:1px solid var(--rule-strong);margin-bottom:48px}
.guide-hero .gtag{
  font-family:var(--mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;
  color:var(--ink-3);display:inline-flex;align-items:center;gap:6px;margin-bottom:16px;
}
.guide-hero .gtag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-2)}
.guide-hero h1{
  font-size:clamp(30px,4.2vw,52px);font-weight:700;letter-spacing:-0.03em;
  line-height:1.06;margin:0 0 16px;max-width:22ch;text-wrap:balance;
}
.guide-hero .lede{
  font-size:17px;line-height:1.65;color:var(--ink-2);max-width:60ch;
  margin:0 0 20px;text-wrap:pretty;
}
.guide-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--ink-3)}
.guide-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3);display:inline-block}
.guide-meta b{color:var(--ink-2);font-weight:600}

/* guide tags */
.guide-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.guide-tag{
  font-family:var(--mono);font-size:10.5px;letter-spacing:0.05em;text-transform:uppercase;
  padding:5px 10px;border-radius:999px;background:var(--bg-2);
  border:1px solid var(--rule-strong);color:var(--ink-3);
}

/* ---------- 2-col layout ---------- */
.art-body{
  display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:64px;
  padding-bottom:48px;
}
.art-content{min-width:0}
.art-aside{position:sticky;top:96px;align-self:start;font-size:13.5px}

.art-aside h4{
  font-family:var(--mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;
  color:var(--ink-3);margin:0 0 12px;font-weight:500;
}
.art-aside .toc{display:flex;flex-direction:column;gap:8px;margin-bottom:32px}
.art-aside .toc a{color:var(--ink-2);padding:4px 0;border-left:2px solid transparent;padding-left:12px;margin-left:-14px;transition:border-color .2s,color .2s}
.art-aside .toc a:hover{color:var(--ink);border-color:var(--ink)}
.art-aside .facts{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:18px}
.art-aside .facts dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:8px 16px;font-size:13px}
.art-aside .facts dt{color:var(--ink-3);font-family:var(--mono);font-size:11px;letter-spacing:0.04em;text-transform:uppercase;align-self:center}
.art-aside .facts dd{margin:0;color:var(--ink);font-weight:500}

/* ---------- PROSE ---------- */
.prose h2{
  font-size:26px;font-weight:700;letter-spacing:-0.02em;line-height:1.2;
  margin:52px 0 16px;text-wrap:balance;scroll-margin-top:96px;color:var(--ink);
}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:19px;font-weight:600;letter-spacing:-0.01em;margin:32px 0 10px;color:var(--ink)}
.prose p{margin:0 0 20px;color:var(--ink-2);font-size:17px;line-height:1.75;text-wrap:pretty}
.prose p > b,.prose p > strong{color:var(--ink);font-weight:600}
.prose ul,.prose ol{margin:0 0 20px;padding-left:22px;color:var(--ink-2);font-size:17px;line-height:1.75}
.prose ul li::marker{color:var(--ink-3)}
.prose code:not(pre code){
  font-family:var(--mono);font-size:.86em;background:var(--bg-2);
  padding:1px 6px;border-radius:5px;border:1px solid var(--rule);color:var(--ink);
}
.prose a{color:var(--accent-2);text-decoration:underline;text-decoration-color:#0052ff44;text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--accent-2)}
.prose pre{
  background:var(--card);border:1px solid var(--rule);border-radius:10px;
  padding:14px 16px;margin:14px 0;
  font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--ink);
  overflow-x:auto;white-space:pre;
}
.prose pre code{background:none;border:none;padding:0;font-size:inherit}
.prose blockquote{
  border-left:3px solid var(--rule-strong);margin:14px 0;padding:10px 16px;
  color:var(--ink-3);font-style:italic;
}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.prose table th{text-align:left;font-weight:600;padding:10px 14px;border-bottom:2px solid var(--rule-strong);font-size:13px;color:var(--ink-3);font-family:var(--mono);text-transform:uppercase;letter-spacing:0.04em}
.prose table td{padding:10px 14px;border-bottom:1px solid var(--rule);color:var(--ink-2);vertical-align:top}
.prose table tr:last-child td{border-bottom:none}

/* ---------- TERMINALS ---------- */
.term{
  background:#0a0a0a;color:#e8e8e3;border-radius:12px;overflow:hidden;
  margin:18px 0 8px;border:1px solid #0a0a0a;
}
.term .bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;border-bottom:1px solid #ffffff10;
  font-family:var(--mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;color:#ffffff60;
}
.term .bar .dots{display:flex;gap:6px}
.term .bar .dots span{width:10px;height:10px;border-radius:50%;background:#ffffff20}
.term .bar .dots span:first-child{background:#ff5f56}
.term .bar .dots span:nth-child(2){background:#ffbd2e}
.term .bar .dots span:nth-child(3){background:#27c93f}
.term pre{
  margin:0;padding:18px 16px;
  font-family:var(--mono);font-size:13px;line-height:1.6;
  white-space:pre;overflow-x:auto;
}
.term pre .c-prompt{color:#c4ff3d}
.term pre .c-key{color:#7ec5ff}
.term pre .c-str{color:#ffdf8a}
.term pre .c-num{color:#ff9a73}
.term pre .c-com{color:#777}
.term .cap{
  padding:10px 14px;border-top:1px solid #ffffff10;
  font-family:var(--mono);font-size:11px;color:#ffffff60;letter-spacing:0.04em;
}

/* callout */
.callout{
  background:var(--bg-2);border-left:3px solid var(--accent-2);border-radius:0 8px 8px 0;
  padding:14px 18px;margin:14px 0;font-size:15.5px;color:var(--ink-2);line-height:1.6;
}

/* SEO callout */
.seo{
  background:var(--bg-2);border:1px solid var(--rule);border-radius:14px;
  padding:24px 26px;margin:24px 0 8px;
}
.seo .label{
  font-family:var(--mono);font-size:10.5px;letter-spacing:0.08em;text-transform:uppercase;color:var(--ink-3);
  display:flex;align-items:center;gap:8px;margin-bottom:10px;
}
.seo .label::before{content:"";width:5px;height:5px;background:var(--accent-2);border-radius:50%}
.seo p{margin:0;color:var(--ink-2);font-size:15.5px;line-height:1.7;text-wrap:pretty}

/* ---------- GUIDE CARD (index page) ---------- */
.guide-card{
  background:var(--card);border:1px solid var(--rule);border-radius:14px;
  padding:26px;display:flex;flex-direction:column;gap:10px;
  transition:transform .25s var(--ease-out),border-color .2s,box-shadow .25s;
  position:relative;
}
.guide-card:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:0 12px 28px -18px #0a0a0a28}
.guide-card .gcat{font-family:var(--mono);font-size:10.5px;letter-spacing:0.06em;text-transform:uppercase;color:var(--ink-3)}
.guide-card h2{font-size:19px;font-weight:600;letter-spacing:-0.015em;line-height:1.25;margin:0;color:var(--ink)}
.guide-card p{font-size:14.5px;color:var(--ink-2);line-height:1.6;margin:0}
.guide-card .gfoot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--rule);
  font-size:12.5px;color:var(--ink-3);display:flex;justify-content:space-between;
}
.guide-card a.stretch{position:absolute;inset:0;border-radius:14px}
.guide-card a.stretch:focus-visible{outline:2px solid var(--accent-2);outline-offset:-2px}

/* ---------- RELATED GUIDES SECTION ---------- */
.guide-related{margin-top:48px}
.guide-related h2{font-size:20px;font-weight:600;margin:0 0 16px;letter-spacing:-0.01em}
.guide-related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.guide-related-card{
  background:var(--card);border:1px solid var(--rule);border-radius:12px;
  padding:18px;position:relative;transition:border-color .2s;
}
.guide-related-card:hover{border-color:var(--ink)}
.guide-related-card a.stretch{position:absolute;inset:0;border-radius:12px}
.guide-related-card a.stretch:focus-visible{outline:2px solid var(--accent-2);outline-offset:-2px}
.guide-related-card .gcat{font-family:var(--mono);font-size:10px;letter-spacing:0.06em;text-transform:uppercase;color:var(--ink-3);margin-bottom:6px}
.guide-related-card h3{font-size:15px;font-weight:600;line-height:1.3;margin:0;color:var(--ink)}

/* ---------- RELATED SKILLS (catalog links) ---------- */
.guide-skills{
  margin-top:40px;padding:24px 26px;
  background:var(--bg-2);border:1px solid var(--rule-strong);border-radius:14px;
}
.guide-skills h2{font-size:16px;font-weight:600;margin:0 0 12px}
.guide-skills-list{display:flex;flex-direction:column;gap:8px}
.guide-skill-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:14px;color:var(--ink-2);padding:8px 0;border-top:1px solid var(--rule);
}
.guide-skill-link:first-child{border-top:none}
.guide-skill-link:hover{color:var(--ink)}
.guide-skill-link span{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:0.05em;color:var(--ink-3)}

/* ---------- NEWSLETTER ---------- */
.guide-newsletter{
  background:var(--ink);color:var(--bg);border-radius:16px;padding:36px;margin-top:48px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.guide-newsletter h3{font-size:22px;font-weight:700;letter-spacing:-0.02em;margin:0 0 8px;line-height:1.1}
.guide-newsletter p{margin:0;color:#fafaf7b8;font-size:14px;max-width:38ch;line-height:1.55}
.guide-news-form{
  display:flex;gap:6px;background:#ffffff10;border:1px solid #ffffff20;
  padding:5px;border-radius:999px;min-width:260px;
}
.guide-news-form:focus-within{border-color:var(--accent)}
.guide-news-form input{
  flex:1;background:transparent;border:0;outline:0;
  color:var(--bg);font-family:inherit;font-size:14px;padding:8px 12px;min-width:0;
}
.guide-news-form input::placeholder{color:#fafaf770}
.guide-news-form button{
  font-family:inherit;background:var(--accent);color:var(--ink);
  border:0;padding:0 16px;border-radius:999px;font-size:13px;font-weight:600;
  cursor:pointer;white-space:nowrap;
}

/* ---------- FOOTER ---------- */
footer{
  max-width:1200px;margin:64px auto 0;padding:28px;
  border-top:1px solid var(--rule);
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);
}
footer .links{display:flex;gap:18px}
footer a:hover{color:var(--ink)}

/* ---------- GUIDES INDEX GRID ---------- */
.guides-intro{max-width:680px;margin:0 0 48px}
.guides-intro h1{font-size:clamp(28px,4vw,44px);font-weight:700;letter-spacing:-0.03em;margin:0 0 14px}
.guides-intro p{font-size:17px;color:var(--ink-2);line-height:1.65;margin:0}
.guides-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-bottom:64px;
}

/* ---------- RESPONSIVE ---------- */
@media(max-width:960px){
  .art-body{grid-template-columns:1fr;gap:0}
  .art-aside{position:static;display:none}
  .guides-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  main{padding:0 22px}
  .nav-in{padding:12px 22px;gap:14px}
  .nav-in .links{display:none}
  .guide-hero h1{font-size:32px}
  .guide-hero .lede{font-size:15.5px}
  .guides-grid{grid-template-columns:1fr}
  .guide-newsletter{padding:24px;flex-direction:column;align-items:flex-start}
  .guide-news-form{min-width:0;width:100%}
  .guide-related-grid{grid-template-columns:1fr}
  footer{padding:22px;flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}