/* site.css — layouts that the three mocks did not cover: article, blog index,
   about, contact, 404. Extends _base.css tokens; no new fonts, no new colors. */

/* ---------- article (53 of 62 pages; no images — type carries the page) ---------- */
.art-head{border-bottom:1px solid var(--line);background:var(--bg2)}
.art-head .wrap{padding-top:36px;padding-bottom:32px;max-width:calc(var(--mx) - 240px)}
.art-head .crumbs{font-size:12.5px;color:var(--muted);margin-bottom:22px}
.art-head .crumbs a{color:var(--fg2)} .art-head .crumbs span{margin:0 7px;opacity:.5}
.art-head h1{font-size:32px;line-height:1.12;max-width:22ch;margin:10px 0 16px}
.art-head .standfirst{font-size:18px;line-height:1.5;color:var(--fg2);max-width:56ch}
.art-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:22px;padding-top:16px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted)}
.art-meta li{list-style:none;display:flex;align-items:center;gap:7px}

.art-body{padding:36px 0 48px}
.art-body .wrap{max-width:calc(var(--mx) - 240px)}
.prose{max-width:68ch;font-size:17px;line-height:1.7;color:var(--fg2)}
.prose>*+*{margin-top:1.15em}
.prose h2{font-size:24px;color:var(--fg);margin-top:2.2em;padding-top:1.1em;border-top:1px solid var(--line);line-height:1.2}
.prose h2:first-child{margin-top:0;padding-top:0;border-top:0}
.prose h3{font-size:18px;color:var(--fg);margin-top:1.8em;letter-spacing:-.01em}
.prose h4{font-size:15px;color:var(--fg);margin-top:1.5em;letter-spacing:.02em;text-transform:uppercase}
.prose h2+p,.prose h3+p,.prose h4+p{margin-top:.6em}
.prose p{color:var(--fg2)}
.prose strong{color:var(--fg)}
.prose a{color:var(--accent);font-weight:600;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose ul,.prose ol{padding-left:1.35em}
.prose li{margin-top:.4em;padding-left:.2em}
.prose li p{margin:0}
.prose li>p+p{margin-top:.4em}
.prose li::marker{color:var(--accent);font-weight:700}
.prose blockquote{font-size:19px;line-height:1.45;margin:1.6em 0}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px}
.prose th,.prose td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.prose th{color:var(--fg);font-size:11px;letter-spacing:.14em;text-transform:uppercase;background:var(--surface2)}
.prose code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em;background:var(--surface2);padding:1px 5px;border-radius:3px}

/* related + closing CTA */
.art-foot{border-top:1px solid var(--line);background:var(--surface);padding:40px 0 48px}
.art-foot .wrap{max-width:calc(var(--mx) - 240px)}
.related{display:grid;gap:12px;margin-top:18px}
.related a{display:block;background:var(--bg2);border:1px solid var(--line);border-radius:var(--rl);padding:16px 18px}
.related a:hover{border-color:var(--line2)}
.related .eyebrow{display:block;margin-bottom:6px}
.related h3{font-size:16px;line-height:1.3;color:var(--fg)}
.related p{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art-cta{margin-top:36px;padding-top:28px;border-top:1px solid var(--line);display:grid;gap:16px}
.art-cta h2{font-size:22px;margin:6px 0 6px}
.art-cta .btns{display:flex;flex-direction:column;gap:10px}

/* ---------- blog index ---------- */
.blog-head{border-bottom:1px solid var(--line);background:var(--bg2)}
.blog-head .wrap{padding-top:40px;padding-bottom:34px}
.blog-head h1{margin:10px 0 12px;max-width:18ch}
.blog-head .lede{max-width:52ch}
.cat-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.cat-nav a{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--line2);border-radius:99px;padding:6px 12px;color:var(--fg2)}
.cat-nav a.on{border-color:rgba(255,122,24,.5);color:var(--accent);background:var(--accent-soft)}
.blog-list{padding:36px 0 56px}
.blog-list h2.cat{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:34px 0 14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.blog-list h2.cat:first-child{margin-top:0}
.post{display:grid;gap:6px;padding:18px 0;border-bottom:1px solid var(--line)}
.post .n{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:11.5px;color:var(--accent);letter-spacing:.06em}
.post h3{font-size:19px;line-height:1.25}
.post h3 a:hover{color:var(--accent)}
.post p{font-size:14.5px;color:var(--muted);line-height:1.5;max-width:64ch}
.post .rt{font-size:12px;color:var(--muted)}

/* ---------- about / contact / 404 ---------- */
.contact-grid{display:grid;gap:28px;padding:36px 0 56px}
.form{background:var(--surface);border:1px solid var(--line);border-radius:var(--rl);padding:22px}
.form .row{display:grid;gap:14px}
.form label{display:block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;margin-bottom:6px}
.form input,.form textarea{width:100%;background:var(--bg);color:var(--fg);border:1px solid var(--line2);border-radius:var(--r);padding:12px 13px;font:inherit;font-size:15px}
.form input:focus,.form textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.form .f{margin-top:14px}
.form .hint{font-size:12px;color:var(--muted);margin-top:6px}
.form .actions{margin-top:20px;display:grid;gap:10px}
.form .notyet{font-size:12.5px;color:var(--warn);border:1px dashed rgba(242,193,78,.4);border-radius:var(--r);padding:10px 12px;margin-top:14px;line-height:1.45}
.sidecard{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--rl);padding:20px}
.sidecard h3{margin-bottom:10px}
.sidecard li{list-style:none;font-size:14px;color:var(--fg2);padding:6px 0;border-bottom:1px solid var(--line);display:flex;gap:10px}
.sidecard li:last-child{border-bottom:0}
.sidecard li i{color:var(--accent);font-style:normal;font-weight:800;flex:none}
.nf{padding:80px 0 96px;text-align:left}
.nf .code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:var(--accent);letter-spacing:.2em}
.nf h1{margin:12px 0 14px;max-width:16ch}
.nf .lede{max-width:46ch}
.nf .links{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.shell-note{background:var(--surface2);border:1px dashed var(--line2);border-radius:var(--r);padding:12px 14px;font-size:13px;color:var(--muted);margin-bottom:22px}

@media(min-width:820px){
  .art-head .wrap{padding-top:64px;padding-bottom:52px}
  .art-head h1{font-size:46px}
  .art-head .standfirst{font-size:20px}
  .art-body{padding:56px 0 72px}
  .prose{font-size:18px;line-height:1.72}
  .prose h2{font-size:28px}
  .prose h3{font-size:20px}
  .art-foot{padding:56px 0 72px}
  .related{grid-template-columns:repeat(3,1fr);gap:16px}
  .art-cta{grid-template-columns:1.3fr auto;align-items:center;gap:48px}
  .art-cta .btns{flex-direction:row}
  .blog-head .wrap{padding-top:72px;padding-bottom:56px}
  .blog-list{padding:56px 0 80px}
  .post{grid-template-columns:56px 1fr;column-gap:20px;align-items:baseline;padding:22px 0}
  .post .n{grid-row:1/span 3}
  .post h3{font-size:22px}
  .contact-grid{grid-template-columns:1.4fr 1fr;gap:44px;align-items:start;padding:56px 0 80px}
  .form{padding:28px}
  .form .row{grid-template-columns:1fr 1fr}
  .form .actions{grid-template-columns:auto 1fr;align-items:center}
}