:root{
  --bg:#062A33; --surface:#0A3A45; --elevated:#0D4552;
  --ink:#EAF6F8; --muted:#9DBEC6;
  --accent:#2DD4BF; --accent2:#7DD3FC; --cta:#FB923C; --line:#155263;
  --light:#F2F7F8; --light-ink:#1E3A42;
  --radius:14px; --max:1200px;
  --font-d:"Sora",system-ui,sans-serif; --font-b:"Inter",system-ui,sans-serif;
  --font-m:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font-b);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none;transition:color .18s cubic-bezier(.2,.7,.3,1)}
@media(hover:hover){
a:hover{text-decoration:underline}
.brand:hover{text-decoration:none}
.nav a:hover{color:var(--ink);text-decoration:none}
.btn:hover{background:#ffa55c;text-decoration:none;color:#231303}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.postcard h2 a:hover{color:var(--accent)}
nav.lang-sw a:hover{color:#EAF6F8;text-decoration:none}
}
.btn:active,.btn-ghost:active{transform:scale(.97)}
@media(prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.bubble{animation:none}
*{transition:none!important;animation:none!important}
}
img,svg{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--font-d);line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.5vw,3.2rem);font-weight:700}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:600;margin:0 0 16px}
h3{font-size:1.2rem;font-weight:600;margin:24px 0 10px}
p{margin:0 0 14px;color:var(--ink)}
.muted{color:var(--muted)}
.mono{font-family:var(--font-m)}
.kicker{font-family:var(--font-m);font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:#062A33;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;min-height:68px;padding-top:8px;padding-bottom:8px;row-gap:4px}
.brand{font-family:var(--font-d);font-weight:700;font-size:1.1rem;color:var(--ink);display:flex;align-items:center;gap:10px}
.brand .dot{width:12px;height:12px;border-radius:50%;background:radial-gradient(circle at 35% 35%,var(--accent2),var(--accent) 60%,#0e7c6f)}
.nav{display:flex;gap:26px;align-items:center;flex-wrap:nowrap}
.nav a{color:var(--muted);font-size:.95rem;font-weight:500;white-space:nowrap;transition:color .18s cubic-bezier(.2,.7,.3,1)}
.nav a.btn{color:#231303}
nav.lang-sw{font-size:13px;white-space:nowrap;margin-left:14px}
nav.lang-sw a{color:#9DBEC6;text-decoration:none;padding:4px 8px}
nav.lang-sw span{font-weight:700;color:#EAF6F8;padding:4px 8px}
.btn{display:inline-block;background:var(--cta);color:#231303;font-weight:700;font-family:var(--font-d);font-size:.95rem;padding:13px 26px;border-radius:999px;border:0;cursor:pointer;white-space:nowrap;transition:background .18s cubic-bezier(.2,.7,.3,1),transform .12s cubic-bezier(.2,.7,.3,1)}
.btn-ghost{display:inline-block;border:1px solid var(--line);color:var(--ink);font-weight:600;padding:12px 24px;border-radius:999px;font-size:.95rem;transition:border-color .18s cubic-bezier(.2,.7,.3,1),color .18s cubic-bezier(.2,.7,.3,1),transform .12s cubic-bezier(.2,.7,.3,1)}
.btn-sm{padding:9px 18px;font-size:.85rem}
/* hero : depth gauge */
.hero{position:relative;overflow:hidden;padding:96px 0 80px;background:linear-gradient(180deg,#041e26 0%,#062A33 55%,#083642 100%)}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .wrap>*{min-width:0}
.hero h1{margin-bottom:18px}
.hero .verdict{font-size:1.15rem;color:var(--muted);max-width:34em;margin-bottom:28px}
.evidence-bar{display:flex;flex-wrap:wrap;gap:0;margin:32px 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:rgba(10,58,69,.6)}
.evidence-bar .ev{flex:1 1 130px;padding:16px 18px;border-right:1px solid var(--line)}
.evidence-bar .ev:last-child{border-right:0}
.evidence-bar .v{font-family:var(--font-m);font-size:1.35rem;font-weight:600;color:var(--accent)}
.evidence-bar .l{font-size:.78rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}
.gauge{position:relative;width:min(380px,90%);margin:0 auto;aspect-ratio:1}
.gauge svg{width:100%;height:100%}
.bubbles{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.bubble{position:absolute;bottom:-20px;border-radius:50%;border:1px solid rgba(125,211,252,.5);background:radial-gradient(circle at 35% 35%,rgba(125,211,252,.35),rgba(125,211,252,.05));animation:rise linear infinite}
@keyframes rise{to{transform:translateY(-110vh)}}
.mat-cards{display:grid;gap:12px;margin-top:18px}
.mat-card{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:var(--surface);display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:center}
.mat-swatch{width:64px;height:64px;border-radius:12px}
.sw-neoprene{background:repeating-linear-gradient(45deg,#0b2b33 0 6px,#103844 6px 12px)}
.sw-silicone{background:linear-gradient(135deg,rgba(45,212,191,.75),rgba(125,211,252,.35));box-shadow:inset 0 0 18px rgba(234,246,248,.25)}
.sw-latex{background:linear-gradient(135deg,#e8c96a,#c9a24a)}
.mat-card .t{font-family:var(--font-d);font-weight:600}
.mat-card .d{font-family:var(--font-m);font-size:.75rem;color:var(--muted)}
/* sections */
.section{padding:72px 0}
.section.alt{background:var(--surface)}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head p{color:var(--muted)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.card h3{margin-top:0}
.card .icon{width:44px;height:44px;margin-bottom:14px;color:var(--accent)}
.alt .card{background:var(--elevated)}
/* lines : alternating feature rows */
.linerow{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:36px 0;border-top:1px solid var(--line)}
.linerow:first-of-type{border-top:0}
.linerow.flip .txt{order:2}
.lineart{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);min-height:220px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.lineart svg{width:120px;height:120px;color:var(--accent2)}
.tagrow{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.tag{font-family:var(--font-m);font-size:.72rem;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:4px 12px}
/* evidence strip */
.estrip{background:linear-gradient(90deg,#083642,#0D4552);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.estrip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:40px 24px}
.estrip .n{font-family:var(--font-m);font-size:1.9rem;color:var(--accent);font-weight:600}
.estrip .c{font-size:.85rem;color:var(--muted)}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px}
.step{padding:28px 24px;border:1px solid var(--line);background:var(--surface)}
.step:first-child{border-radius:var(--radius) 0 0 var(--radius)}
.step:last-child{border-radius:0 var(--radius) var(--radius) 0}
.step .n{font-family:var(--font-m);color:var(--accent);font-size:.85rem;letter-spacing:.1em}
.step h3{margin:8px 0}
/* cta band */
.cta-band{background:linear-gradient(135deg,#0D4552,#083642);border:1px solid var(--line);border-radius:20px;padding:56px;text-align:center;margin:72px 0}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--muted);max-width:560px;margin:0 auto 26px}
/* category layout */
.catlayout{display:grid;grid-template-columns:3fr 9fr;gap:32px;align-items:start}
.oem-side{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:sticky;top:92px}
.oem-side h3{font-size:1rem;margin:0 0 12px;color:var(--accent);font-family:var(--font-m);letter-spacing:.08em;text-transform:uppercase}
.oem-side ul{list-style:none;margin:0 0 18px}
.oem-side li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:.92rem;color:var(--muted)}
.oem-side li strong{color:var(--ink)}
.prose h2{margin-top:36px}
.prose ul{margin:0 0 16px 22px;color:var(--ink)}
.prose li{margin-bottom:8px}
/* light spec card */
.speccard{background:var(--light);color:var(--light-ink);border-radius:var(--radius);padding:26px;margin:28px 0}
.speccard h3{color:var(--light-ink);margin-top:0}
.speccard ul{margin:0 0 0 20px}
.speccard li{margin-bottom:6px}
/* blog */
.bloglayout{display:grid;grid-template-columns:minmax(0,72ch) 300px;gap:48px;align-items:start;justify-content:center}
.blogside{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:sticky;top:92px}
.blogside h3{font-size:.95rem;margin:0 0 12px}
.blogside a{display:block;padding:8px 0;font-size:.9rem;color:var(--muted)}
.postlist{display:grid;gap:20px}
.postcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.postcard h2{margin:0 0 10px;font-size:1.4rem}
.postcard h2 a{color:var(--ink)}
.postcard .ex{color:var(--muted)}
/* contact */
.contactgrid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contactcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.contactcard .big{font-family:var(--font-m);font-size:1.15rem;color:var(--accent);word-break:break-all}
/* lead form (web3forms) */
.leadform{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-top:24px}
.leadform label{display:block;font-size:.9rem;font-weight:600;margin-bottom:16px}
.leadform input,.leadform select,.leadform textarea{display:block;width:100%;margin-top:6px;padding:11px 14px;background:var(--bg);border:1px solid var(--line);border-radius:10px;color:var(--ink);font:inherit;font-size:.95rem;font-weight:400}
.leadform textarea{resize:vertical;min-height:120px}
.leadform input:focus,.leadform select:focus,.leadform textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
/* footer */
footer{border-top:1px solid var(--line);margin-top:0;background:#041e26}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;padding:56px 24px 32px;gap:32px}
footer h4{font-family:var(--font-m);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer li a{color:var(--muted);font-size:.92rem}
.fine{border-top:1px solid var(--line);padding:20px 0;color:var(--muted);font-size:.82rem}
.fine .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
/* pagehead */
.pagehead{padding:64px 0 40px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#041e26,#062A33)}
.pagehead p{color:var(--muted);max-width:640px}
/* responsive */
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .linerow{grid-template-columns:1fr}
  .linerow.flip .txt{order:0}
  .steps{grid-template-columns:1fr 1fr}
  .step:first-child{border-radius:var(--radius) 0 0 0}
  .step:nth-child(2){border-radius:0 var(--radius) 0 0}
  .estrip .wrap{grid-template-columns:1fr 1fr}
  .catlayout{grid-template-columns:1fr}
  .oem-side{position:static}
  .bloglayout{grid-template-columns:1fr}
  .blogside{position:static}
  .contactgrid{grid-template-columns:1fr}
  .nav{display:none}
  .site-header .wrap{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:10px;row-gap:4px}
  nav.lang-sw{order:3;flex-basis:100%;margin-left:0;text-align:right}
  .cta-band{padding:36px 24px}
}