:root{--bg:#0b1020;--panel:#0f172a;--text:#e5e7eb;--muted:#9ca3af;--brand:#60a5fa;--brand2:#22d3ee;--ring:#93c5fd;--ok:#22c55e;--warn:#f59e0b;--maxw:1040px}
@media (prefers-color-scheme: light){:root{--bg:#ffffff;--panel:#ffffff;--text:#111827;--muted:#4b5563;--brand:#2563eb;--brand2:#06b6d4;--ring:#3b82f6}}
*{box-sizing:border-box}html,body{height:100%}body{margin:0;font:16px/1.65 system-ui,-apple-system,Segoe UI,Inter,Roboto,"Helvetica Neue",Arial;background:linear-gradient(180deg,var(--bg),#0b1229 60%,var(--bg));color:var(--text);-webkit-font-smoothing:antialiased}
.container{max-width:var(--maxw);margin:0 auto;padding:0 1rem}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:var(--panel);color:var(--text);padding:.5rem .75rem;border-radius:.5rem;outline:2px solid var(--ring)}
header.nav{position:sticky;top:0;backdrop-filter:saturate(120%) blur(8px);background:color-mix(in oklab,var(--panel),transparent 40%);z-index:10}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0}
.brand{font-weight:800;letter-spacing:.3px}.brand a{color:var(--text);text-decoration:none}
nav a{color:var(--text);text-decoration:none;opacity:.9}nav a:hover,nav a:focus{opacity:1}
.nav-links{display:flex;gap:clamp(.5rem,2vw,1.25rem);align-items:center;flex-wrap:wrap}
.btn{display:inline-block;padding:.6rem .95rem;border-radius:.75rem;border:1px solid color-mix(in oklab,var(--brand),white 20%);color:var(--text);text-decoration:none;background:linear-gradient(180deg,color-mix(in oklab,var(--brand),transparent 70%),color-mix(in oklab,var(--brand2),transparent 80%));box-shadow:0 1px 0 rgba(255,255,255,.06) inset}
.btn:hover{filter:brightness(1.05)}button.btn{cursor:pointer}
.hero{padding:clamp(2rem,6vw,6rem) 0;text-align:center}
.hero h1{font-size:clamp(1.8rem,3vw + 1rem,3.2rem);line-height:1.15;margin:0 0 .6rem}
.hero p{margin:0 auto;max-width:60ch;color:var(--muted);font-size:clamp(1rem,1.2vw + .8rem,1.25rem)}
section{padding:clamp(1.5rem,4vw,3rem) 0}
section .h{font-size:clamp(1.25rem,1.8vw + .8rem,2rem);margin:0 0 .75rem}
.lead{color:var(--muted);max-width:70ch}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(1,minmax(0,1fr))}
@media (min-width:720px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{padding:1rem;border-radius:1rem;background:color-mix(in oklab,var(--panel),black 4%);border:1px solid rgba(255,255,255,.06)}
.card h3{margin:0 0 .25rem;font-size:1.05rem}.muted{color:var(--muted);font-size:.95rem}
.prose{max-width:80ch}.prose p{margin:.6rem 0}.prose ul{padding-left:1.2rem}
.spacer{height:1px;background:rgba(255,255,255,.08);margin:1.25rem 0}
footer{padding:2rem 0 4rem;color:var(--muted);font-size:.95rem;border-top:1px solid rgba(255,255,255,.06)}
footer .cols{display:grid;gap:1rem;grid-template-columns:repeat(1,minmax(0,1fr))}
@media (min-width:720px){footer .cols{grid-template-columns:2fr 1fr 1fr}}
footer a{color:inherit;text-decoration:none}footer a:hover{text-decoration:underline}
form{display:grid;gap:.75rem;max-width:560px}
input,textarea{width:100%;padding:.75rem .85rem;border-radius:.6rem;border:1px solid rgba(255,255,255,.12);background:color-mix(in oklab,var(--panel),black 6%);color:var(--text)}
input:focus,textarea:focus,.btn:focus{outline:2px solid var(--ring);outline-offset:2px}
textarea{min-height:140px;resize:vertical}
.notice{padding:.75rem 1rem;border:1px dashed rgba(255,255,255,.2);border-radius:.6rem}
.badge{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.8rem;color:var(--text);background:color-mix(in oklab,var(--brand2),black 80%);border:1px solid rgba(255,255,255,.08)}