:root{
  --bg:#F0EBE0;--bg-card:#F7F3EA;--bg-dip:#E9E2D2;--ink:#0A0E16;--muted:#4A5262;
  --blue:#2057B2;--blue-display:#2E7DFF;--yellow:#FADA3F;--line:rgba(10,14,22,.14);--line-soft:rgba(10,14,22,.08);
  --font-display:'Archivo',sans-serif;--font-body:'Instrument Sans',sans-serif;--font-mono:'IBM Plex Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--yellow);color:var(--ink)}
a{color:var(--blue)}
img{max-width:100%;display:block}
.wrap{max-width:820px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--font-display);letter-spacing:-.02em;line-height:1.1;font-weight:800}
h1{font-size:clamp(2.1rem,5vw,3.1rem);margin:10px 0 18px}
h2{font-size:clamp(1.5rem,3.4vw,2.1rem);margin:44px 0 14px}
h3{font-size:1.2rem;font-weight:700;margin:26px 0 8px}
p{margin-bottom:18px;color:#26303f}
.lead{font-size:1.24rem;color:var(--muted);margin-bottom:8px}
strong{color:var(--ink)}
.hl{background:var(--yellow);color:var(--ink);padding:.02em .14em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.mono{font-family:var(--font-mono)}
ul,ol{margin:0 0 18px 22px}
li{margin-bottom:8px;color:#26303f}
/* nav */
.nav{position:sticky;top:16px;z-index:50;margin:16px auto 0;max-width:1120px;padding:0 24px}
.nav-inner{display:flex;align-items:center;justify-content:space-between;background:rgba(240,235,224,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:999px;padding:10px 12px 10px 22px}
.nav-logo{font-family:var(--font-display);font-weight:900;font-size:1.1rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.nav-logo span{color:var(--blue)}
.nav-cta{font-family:var(--font-display);font-weight:700;font-size:.9rem;background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:999px;text-decoration:none;transition:background .2s}
.nav-cta:hover{background:var(--blue)}
/* article */
article{padding:40px 0 20px}
.crumb{font-family:var(--font-mono);font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.crumb a{color:var(--blue);text-decoration:none}
.meta-line{font-family:var(--font-mono);font-size:.82rem;color:var(--muted);margin-bottom:30px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.tldr{background:var(--bg-card);border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:14px;padding:22px 24px;margin:24px 0 34px}
.tldr .k{font-family:var(--font-mono);font-size:.74rem;text-transform:uppercase;letter-spacing:.12em;color:var(--blue);font-weight:600;margin-bottom:8px}
.tldr p{margin:0;font-size:1.02rem}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;margin:28px 0}
.stat-row .s{background:var(--bg);padding:22px 18px}
.stat-row .v{font-family:var(--font-display);font-weight:900;font-size:1.7rem;color:var(--blue);letter-spacing:-.02em;line-height:1}
.stat-row .l{font-size:.86rem;color:var(--muted);margin-top:8px}
@media(max-width:620px){.stat-row{grid-template-columns:1fr}}
.callout{background:var(--ink);color:var(--bg);border-radius:18px;padding:30px;margin:34px 0}
.callout p{color:rgba(240,235,224,.88)}
.callout strong{color:var(--yellow)}
/* faq */
details.faq{border-bottom:1px solid var(--line);padding:4px 0}
details.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:14px;align-items:center;padding:18px 0;font-family:var(--font-display);font-weight:700;font-size:1.08rem}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary .ic{flex:none;width:24px;height:24px;border:1px solid var(--line);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);transition:transform .3s,background .2s}
details.faq[open] summary .ic{transform:rotate(45deg);background:var(--yellow)}
details.faq .a{padding:0 0 18px;color:#26303f}
/* cta band */
.cta{background:var(--ink);color:var(--bg);border-radius:22px;padding:40px 32px;text-align:center;margin:44px 0 10px}
.cta h2{color:var(--bg);margin:0 auto 12px;max-width:20ch}
.cta p{color:rgba(240,235,224,.8);max-width:48ch;margin:0 auto 24px}
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1rem;padding:15px 26px;border-radius:999px;text-decoration:none;border:2px solid var(--yellow);background:var(--yellow);color:var(--ink);transition:background .2s,color .2s}
.btn:hover{background:transparent;color:var(--yellow)}
.btn-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn-ghost{background:transparent;color:var(--bg);border-color:rgba(240,235,224,.4)}
.btn-ghost:hover{background:var(--bg);color:var(--ink);border-color:var(--bg)}
.related{margin:30px 0}
.related a{display:block;background:var(--bg-card);border:1px solid var(--line);border-radius:14px;padding:18px 22px;text-decoration:none;color:var(--ink);margin-bottom:12px;font-family:var(--font-display);font-weight:600;transition:transform .2s,box-shadow .2s}
.related a:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(10,14,22,.1)}
.related a span{display:block;font-family:var(--font-body);font-weight:400;font-size:.9rem;color:var(--muted);margin-top:4px}
footer{background:var(--ink);color:rgba(240,235,224,.7);padding:40px 0;margin-top:40px;text-align:center;font-size:.9rem}
footer p{color:rgba(240,235,224,.75);margin:0}
footer a{color:rgba(240,235,224,.9)}
a:focus-visible,summary:focus-visible,.btn:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
/* nav links (guides header) */
.nav-links{display:flex;gap:2px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links li{margin:0}
.nav-links a{color:var(--ink);text-decoration:none;font-weight:500;font-size:.92rem;padding:8px 13px;border-radius:999px;transition:background .2s}
.nav-links a:hover{background:rgba(10,14,22,.06)}
.nav-links a.active{background:rgba(32,87,178,.1);color:var(--blue)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;padding:8px;cursor:pointer}
.nav-toggle svg{width:22px;height:22px;stroke:var(--ink)}
@media(max-width:860px){
  .nav-links{position:absolute;top:64px;left:24px;right:24px;flex-direction:column;align-items:stretch;background:var(--bg-card);border:1px solid var(--line);border-radius:18px;padding:10px;gap:2px;box-shadow:0 20px 50px rgba(10,14,22,.16);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
}
/* guides listing */
.page-head{padding:40px 0 6px}
.eyebrow{font-family:var(--font-mono);font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.14em;color:var(--blue);display:flex;align-items:center;gap:10px;margin-bottom:16px}
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:34px 0 10px}
@media(max-width:640px){.guide-grid{grid-template-columns:1fr}}
.guide-card{display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--line);border-radius:18px;padding:28px;text-decoration:none;color:var(--ink);transition:transform .25s,box-shadow .25s,border-color .25s}
.guide-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(10,14,22,.12);border-color:rgba(10,14,22,.3)}
.guide-card .tag{font-family:var(--font-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--blue);font-weight:600;margin-bottom:14px}
.guide-card h2{margin:0 0 10px;font-size:1.35rem}
.guide-card p{color:var(--muted);font-size:.98rem;flex:1;margin-bottom:16px}
.guide-card .read{font-family:var(--font-display);font-weight:700;color:var(--blue);display:inline-flex;align-items:center;gap:6px}