/* Shared styling for the per-OS Helix install guides. Dark, cyan-accented,
   step-by-step. Self-contained — no external fonts. */
:root{--bg:#070709;--bg2:#0d0d12;--surface:#16161c;--line:#23232c;--ink:#ECECF1;--muted:#8a8a96;--cyan:#4FB0C6;--cyan2:#7fe6ff;--red:#D7263D;--ok:#3fb950}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--cyan);text-decoration:none}a:hover{text-decoration:underline}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace}
code{background:#0a0e14;border:1px solid var(--line);border-radius:6px;padding:2px 7px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px;color:var(--cyan2)}
pre{background:#0a0e14;border:1px solid var(--line);border-radius:12px;padding:14px 16px;overflow:auto;margin:10px 0}
pre code{background:none;border:0;padding:0;color:#cdd3dd}
nav{position:fixed;inset:0 0 auto 0;height:60px;z-index:50;backdrop-filter:blur(12px);background:rgba(7,7,9,.6);border-bottom:1px solid var(--line)}
nav .w{max-width:880px;margin:0 auto;height:100%;padding:0 22px;display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:700;letter-spacing:.26em;font-size:15px}
nav a{color:var(--muted);font-size:14px;margin-left:20px}nav a:hover{color:var(--ink);text-decoration:none}
main{max-width:880px;margin:0 auto;padding:92px 22px 80px}
.eyebrow{color:var(--cyan);font-size:13px;letter-spacing:.16em;text-transform:uppercase;font-weight:700}
h1{font-size:clamp(30px,5vw,42px);letter-spacing:-.02em;margin:8px 0 6px}
.lead{color:var(--muted);font-size:18px;margin-bottom:22px}
.osbar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 30px}
.osbar a{border:1px solid var(--line);border-radius:999px;padding:7px 14px;color:var(--muted);font-size:14px;font-weight:600}
.osbar a.on{background:var(--cyan);color:#04121a;border-color:transparent}
.osbar a:hover{color:var(--ink);text-decoration:none}
.steps{counter-reset:step;margin-top:8px}
.step{position:relative;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:20px 22px 20px 64px;margin:14px 0}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:20px;width:30px;height:30px;border-radius:50%;background:var(--cyan);color:#04121a;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px}
.step h3{font-size:18px;margin-bottom:6px;letter-spacing:-.01em}
.step p,.step li{color:#cdd3dd}
.step ul,.step ol{margin:8px 0 0 20px}.step li{margin:4px 0}
.note{border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:10px;padding:12px 15px;margin:12px 0;background:var(--bg2);color:#cdd3dd;font-size:14.5px}
.warn{border:1px solid var(--red);border-left:3px solid var(--red);border-radius:10px;padding:12px 15px;margin:12px 0;background:#2a0e12;font-size:14.5px}
.warn b{color:#ff9a9a}
.ok{border-left-color:var(--ok)}
.btn{display:inline-block;background:var(--cyan);color:#04121a;font-weight:700;border-radius:10px;padding:11px 18px;margin-top:8px}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
h2{font-size:24px;margin:34px 0 6px;letter-spacing:-.01em}
.faq{border-top:1px solid var(--line);margin-top:6px}
.faq h3{font-size:16px;margin:18px 0 4px}
footer{border-top:1px solid var(--line);max-width:880px;margin:40px auto 0;padding:30px 22px;color:#5a5a64;font-size:12px;line-height:1.6}
@media(max-width:560px){.step{padding-left:58px}}