/* Shared styling for Helix comparison / article / features pages. */
:root{--bg:#070709;--bg2:#0d0d12;--surface:#16161c;--line:#23232c;--ink:#ECECF1;--muted:#8a8a96;--cyan:#4FB0C6;--cyan2:#7fe6ff;--red:#D7263D;--green:#3fb950}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:17px/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,"SF Mono",Menlo,Consolas,monospace}
nav{position:fixed;inset:0 0 auto 0;height:58px;z-index:50;backdrop-filter:blur(12px);background:rgba(7,7,9,.7);border-bottom:1px solid var(--line)}
nav .w{max-width:1000px;margin:0 auto;height:100%;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:700;letter-spacing:.26em;font-size:15px}
nav .lnk a{color:var(--muted);font-size:14px;margin-left:20px}nav .lnk a:hover{color:var(--ink);text-decoration:none}
.cta{border:1px solid var(--cyan);color:var(--cyan)!important;padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600}
.cta:hover{background:var(--cyan);color:#04121a!important;text-decoration:none!important}
main{max-width:820px;margin:0 auto;padding:96px 24px 80px}
.eyebrow{color:var(--cyan);letter-spacing:.22em;font-size:12px;font-weight:700;text-transform:uppercase}
h1{font-size:clamp(30px,5vw,46px);line-height:1.08;letter-spacing:-.02em;margin:14px 0 12px}
h1 .g{background:linear-gradient(120deg,#fff,var(--cyan2));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:19px;margin-bottom:30px}
h2{font-size:26px;letter-spacing:-.01em;margin:38px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
h3{font-size:18px;margin:24px 0 8px;color:var(--cyan2)}
p{margin:14px 0;color:#d7dce4}
ul,ol{margin:14px 0 14px 24px}li{margin:7px 0;color:#d7dce4}
strong,b{color:#fff}
blockquote{border-left:3px solid var(--cyan);background:var(--surface);border-radius:8px;padding:14px 18px;margin:18px 0;color:#cdd3dd;font-style:italic}
code{background:#0a0e14;border:1px solid var(--line);border-radius:6px;padding:2px 7px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em;color:var(--cyan2)}
.callout{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:10px;padding:16px 18px;margin:20px 0;font-size:15px}
.callout.warn{border-left-color:var(--red)}
/* comparison table */
.cmp{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;overflow:hidden;border-radius:14px;border:1px solid var(--line)}
.cmp th,.cmp td{padding:13px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.cmp thead th{background:var(--surface);font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.cmp thead th.h{color:var(--cyan2)}
.cmp td.feat{color:var(--muted);width:34%}
.cmp .y{color:var(--green);font-weight:600}.cmp .n{color:var(--muted)}.cmp .part{color:#e9b949}
.cmp tr:last-child td{border-bottom:none}
.cmp td.helix{background:rgba(79,176,198,.06)}
/* feature grid */
.fgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:26px 0}
.fcard{border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:18px 20px}
.fcard .ic{font-size:22px;color:var(--cyan);margin-bottom:8px}
.fcard h3{margin:0 0 6px;color:var(--ink);font-size:16px}
.fcard p{margin:0;color:var(--muted);font-size:14px}
.ctarow{display:flex;gap:14px;flex-wrap:wrap;margin:34px 0}
.btn{padding:13px 24px;border-radius:12px;font-weight:600;transition:.2s}
.btn.primary{background:var(--cyan);color:#04121a}.btn.primary:hover{text-decoration:none;transform:translateY(-2px)}
.btn.ghost{border:1px solid var(--line);color:var(--ink)}.btn.ghost:hover{border-color:var(--cyan);text-decoration:none}
.toc{font-size:14.5px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:22px 0}
.toc a{display:block;color:var(--muted);padding:3px 0}.toc a:hover{color:var(--ink);text-decoration:none}
.meta{color:#5a5a64;font-size:13px;margin-bottom:24px}
.related{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.related a{border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;color:var(--ink)}
.related a:hover{border-color:var(--cyan);color:var(--cyan);text-decoration:none}
footer{border-top:1px solid var(--line);max-width:820px;margin:0 auto;padding:34px 24px;color:#5a5a64;font-size:12px;line-height:1.6}
@media(max-width:680px){.fgrid{grid-template-columns:1fr}nav .lnk a:not(.cta){display:none}}