:root{
 --ink:#171b21;--ink-2:#3b4250;--muted:#6b7280;--paper:#f6f5f1;--paper-2:#ecebe6;--line:#d9d7d0;
 --navy:#152131;--navy-2:#1d2d42;--sky:#7cc4f2;--sky-ink:#0d2a3f;--blue:#21486f;--warn:#b45309;--warn-bg:#fdecd3;
 --radius:16px;--shadow:0 18px 40px rgba(20,28,40,.14);
 font-family:Inter,"Segoe UI",Roboto,Helvetica,Arial,system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--paper);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{width:min(1180px,100% - 32px);margin-inline:auto}
h1,h2,h3{line-height:1.1;margin:0 0 .5em;letter-spacing:-.02em}
h2{font-size:clamp(1.8rem,3.6vw,2.6rem)}
h3{font-size:1.1rem}
p{margin:0 0 1em}

/* Navigation */
.nav{position:sticky;top:0;z-index:20;background:rgba(21,33,49,.96);backdrop-filter:blur(8px);color:#fff}
.nav-row{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:.14em;font-size:.95rem}
.links{display:flex;gap:26px;margin-left:auto}
.links a{text-decoration:none;opacity:.85;font-weight:500}
.links a:hover{opacity:1}
.nav-actions{display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid rgba(255,255,255,.3);border-radius:999px;overflow:hidden}
.lang button{background:none;border:0;color:#fff;padding:6px 12px;font:inherit;font-size:.8rem;font-weight:700;cursor:pointer;opacity:.7}
.lang button[aria-pressed=true]{background:#fff;color:var(--navy);opacity:1}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:10px 18px;font:inherit;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-lg{padding:15px 26px;font-size:1.05rem}
.btn-primary{background:var(--navy-2);color:#fff;box-shadow:var(--shadow)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:rgba(255,255,255,.85)}
.btn-sky{background:var(--sky);color:var(--sky-ink)}

/* Hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#dfe7ef 0%,#eef1f3 45%,var(--paper) 100%)}
.hero-art{position:absolute;right:-6%;top:40px;width:min(980px,80vw);opacity:.16;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .85fr .7fr;gap:28px;align-items:center;padding:56px 0 40px}
.eyebrow,.kicker{font-size:.78rem;font-weight:700;letter-spacing:.3em;color:var(--ink-2);margin-bottom:14px}
.hero h1{font-size:clamp(2.6rem,5vw,4.3rem);white-space:nowrap;font-weight:900;letter-spacing:-.04em;margin-bottom:.15em}
.tagline{font-size:clamp(1.3rem,2.4vw,1.9rem);font-weight:700;color:var(--ink-2);line-height:1.2;margin-bottom:.6em}
.lead{font-size:1.1rem;color:var(--ink-2);max-width:34em}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 14px}
.fine{font-size:.85rem;color:var(--muted);letter-spacing:.02em}
.release{font-size:.85rem;color:var(--muted);margin-top:10px}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--navy-2);color:#fff;font-size:.75rem;font-weight:800;letter-spacing:.06em;vertical-align:middle}
.pill-warn{background:var(--warn-bg);color:var(--warn)}
.hero-device{display:flex;justify-content:center}
.device-main{width:min(420px,100%);filter:drop-shadow(0 30px 40px rgba(15,23,35,.25))}
.hero-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hero-side figure{margin:0;text-align:center}
.hero-side img{width:100%}
.hero-side figcaption{font-size:.68rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin-top:2px}
.pillars{position:relative;background:var(--navy);color:#fff}
.pillar-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.pillar{display:flex;gap:14px;align-items:flex-start;padding:24px 22px}
.pillar+.pillar{border-left:1px solid rgba(255,255,255,.14)}
.pillar svg{flex:none;width:30px;height:30px;fill:none;stroke:#fff;stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}
.pillar b{display:block;font-size:1.02rem;margin-bottom:2px}
.pillar span{font-size:.9rem;opacity:.75}

/* Sections */
.section{padding:84px 0}
.section.alt{background:var(--paper-2)}
.section.dark{background:var(--navy);color:#fff}
.section.dark .kicker{color:var(--sky)}
.sub{color:var(--ink-2);max-width:44em;margin-bottom:36px}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.gallery figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 14px 18px;transition:box-shadow .2s}
.gallery figure:hover{box-shadow:var(--shadow)}
.gallery figcaption{margin-top:6px}
.gallery b{display:block}
.gallery span{display:block;font-size:.9rem;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card p{color:var(--ink-2);margin:0}
.split{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.split.narrow{grid-template-columns:1fr;max-width:820px}
.split-img{width:min(380px,100%);justify-self:center;filter:drop-shadow(0 24px 30px rgba(15,23,35,.2))}
.ticks{list-style:none;padding:0;margin:18px 0 0}
.ticks li{position:relative;padding-left:28px;margin:8px 0}
.ticks li::before{content:"";position:absolute;left:0;top:.45em;width:14px;height:8px;border-left:2.5px solid currentColor;border-bottom:2.5px solid currentColor;transform:rotate(-45deg)}
.ticks.light li{color:#dbe3ec}

/* Install */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:32px 0}
.step{display:flex;gap:16px;background:var(--navy-2);border-radius:var(--radius);padding:22px}
.step>span{flex:none;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--sky);color:var(--sky-ink);font-weight:900}
.step p{margin:4px 0 0;color:#c9d4df;font-size:.95rem}
.installer{text-align:center;padding:26px 0 10px}
.installer .fine{color:#9fb0c2;margin-top:12px}
.notice{display:inline-block;background:#fff4e0;color:#5b3a06;border-radius:12px;padding:14px 18px;max-width:560px}
.guide{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding-top:36px}
.guide h3{color:#fff;margin-top:6px}
.guide p{color:#c9d4df}
.files{font-size:.85rem;word-break:break-all}.files a{color:var(--sky)}
pre{background:#0d1622;color:#d6e2ee;border-radius:12px;padding:16px;overflow-x:auto;font-size:.85rem;line-height:1.5}

/* FAQ / footer */
.faq{max-width:820px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:12px 0}
summary{font-weight:700;cursor:pointer}
details p{margin:12px 0 0;color:var(--ink-2)}
.footer{background:var(--navy);color:#cfd8e2;padding:40px 0}
.foot-row{display:grid;gap:10px}
.footer .brand{color:#fff}
.footer .fine{color:#8fa1b4}

@media (max-width:1060px){
 .hero-grid{grid-template-columns:1fr 1fr}
 .hero-side{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}
 .gallery{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
 .links{display:none}
 .nav-actions{margin-left:auto}
 .nav-actions .btn{display:none}
 .hero-grid{grid-template-columns:1fr;padding-top:36px}
 .hero-side{grid-template-columns:repeat(2,1fr)}
 .pillar-row,.cards,.steps,.split,.guide{grid-template-columns:1fr}
 .pillar+.pillar{border-left:0;border-top:1px solid rgba(255,255,255,.14)}
 .section{padding:60px 0}
 .gallery{grid-template-columns:1fr 1fr;gap:14px}
}

/* Products and flasher (two-board site) */
.hero-compact .hero-art{top:0;opacity:.12}
.hero-intro{position:relative;padding:64px 0 56px;max-width:760px}
.products{padding-top:48px}
.tabs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:36px}
.tabs button,.pick button{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;font:inherit;color:var(--ink);background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:16px 20px;cursor:pointer;transition:border-color .15s,box-shadow .15s}
.tabs button b,.pick button b{font-size:1.15rem}
.tabs button span,.pick button span{font-size:.85rem;color:var(--muted)}
.tabs button[aria-selected=true]{border-color:var(--navy-2);box-shadow:var(--shadow)}
.tabs button:focus-visible,.pick button:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.product-head{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;margin-bottom:40px}
.product-head .sub{margin-bottom:22px}
.product-hero{justify-self:center;width:min(380px,100%)}
.product-hero.landscape{width:min(500px,100%)}
.feat-title{font-size:1.4rem;margin:48px 0 0}
.card h4{margin:0 0 .4em;font-size:1.05rem}
.sub.light{color:#c9d4df}
.flasher{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px;margin:32px 0 8px;align-items:start}
.pick{display:grid;gap:12px}
.pick button{background:var(--navy-2);color:#fff;border-color:transparent}
.pick button span{color:#9fb0c2}
.pick button[aria-checked=true]{border-color:var(--sky)}
.fw-card{background:var(--navy-2);border-radius:var(--radius);padding:24px}
.fw-card dl{margin:0 0 14px;display:grid;gap:10px}
.fw-card dl div{display:grid;grid-template-columns:110px 1fr;gap:12px}
.fw-card dt{color:#9fb0c2;font-size:.9rem}
.fw-card dd{margin:0;font-weight:600}
.warn{background:#fff4e0;color:#5b3a06;border-radius:10px;padding:10px 14px;font-size:.9rem}
.fw-card .files{color:#9fb0c2;margin:14px 0 0}
@media (max-width:760px){
 .tabs,.product-head,.flasher{grid-template-columns:1fr}
 .fw-card dl div{grid-template-columns:1fr;gap:0}
}
.linux{margin-top:16px;background:#1b2a3c;border-radius:12px;padding:14px 18px;max-width:640px}
.linux p{margin:0 0 10px;color:#d6e2ee}
.linux pre{margin:0 0 10px;font-size:.78rem;white-space:pre-wrap;word-break:break-all}
details pre{margin:12px 0 0;font-size:.78rem;white-space:pre-wrap;word-break:break-all}