/* RRB Labs — dark, precise, one teal accent (#5eead4) with an indigo second (#a5b4fc).
   System fonts only: no external requests, CSP stays 'self'. */
:root{--bg:#0b0f14;--bg2:#080b0f;--surface:#111923;--surface2:#16202c;--line:#223041;--line2:#2c3d51;--ink:#eef2f6;--muted:#9aa8b6;--dim:#6b7a89;--accent:#5eead4;--accent-ink:#04201b;--accent2:#a5b4fc;--warn:#fbbf24;--max:1160px;--radius:14px;--sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16.5px/1.65 var(--sans);overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:3px}a:hover{color:#99f6e4}
img{max-width:100%;height:auto;display:block}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:.5rem 1rem;border-radius:0 0 8px 0}.skip:focus{left:0;z-index:60}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.i{width:20px;height:20px;flex:none;vertical-align:-4px}

/* Language suggestion bar (site.js) */
.lang-suggest{display:flex;align-items:center;justify-content:center;gap:1rem;padding:.45rem 16px;background:var(--surface2);border-bottom:1px solid var(--line);font-size:.93rem}
.lang-suggest a{color:var(--accent);text-decoration:none;font-weight:600}
.lang-suggest button{background:none;border:0;color:var(--muted);font-size:1.3rem;line-height:1;cursor:pointer;min-width:44px;min-height:36px}

/* Header */
.site-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:.5rem 1.5rem;padding:.6rem max(16px,calc((100vw - var(--max))/2));background:#0b0f14d9;-webkit-backdrop-filter:saturate(140%) blur(12px);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid #22304180}
.brand{display:inline-flex;align-items:center;gap:.6rem;min-height:44px;color:var(--ink);text-decoration:none;font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.brand:hover{color:var(--ink)}
.brand .mark{width:34px;height:34px}
.brand b{font-weight:400;color:var(--accent);margin-left:.25em}
.site-nav{margin-left:auto}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.1rem .3rem}
.site-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 .7rem;color:var(--muted);text-decoration:none;font-size:.95rem;border-radius:8px}
.site-nav a:hover{color:var(--ink);background:var(--surface)}
.site-nav a[aria-current]{color:var(--ink);background:var(--surface2)}
.lang-menu{position:relative}
.lang-menu summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:.4rem;min-height:40px;padding:0 .75rem;border:1px solid var(--line2);border-radius:999px;color:var(--ink);font-size:.85rem;font-weight:600;letter-spacing:.04em}
.lang-menu summary::-webkit-details-marker{display:none}
.lang-menu summary .i{width:16px;height:16px;color:var(--muted)}
.lang-menu ul{position:absolute;right:0;z-index:40;margin:.4rem 0 0;padding:.35rem;list-style:none;background:var(--surface);border:1px solid var(--line2);border-radius:12px;min-width:13rem;box-shadow:0 18px 40px #0009}
.lang-menu li a{display:block;padding:.55rem .8rem;border-radius:8px;color:var(--ink);text-decoration:none;font-size:.95rem}
.lang-menu li a:hover{background:var(--surface2)}
.lang-menu li a[aria-current]{color:var(--accent)}
@media (max-width:760px){
  .site-header{flex-wrap:wrap;position:static}
  .site-nav{order:3;width:100%;margin:0 -0.7rem;overflow-x:auto}
  .site-nav ul{flex-wrap:nowrap}
  .lang-menu{margin-left:auto}
}

main{max-width:var(--max);margin:0 auto;padding:0 16px 3rem}

/* Type */
h1,h2,h3{letter-spacing:-.02em;line-height:1.12;font-weight:700}
h1{font-size:clamp(2.1rem,5.4vw,3.9rem);margin:0 0 1.1rem;max-width:20ch}
h2{font-size:clamp(1.55rem,3.2vw,2.25rem);margin:0 0 .75rem}
h3{font-size:1.2rem;margin:0}
.lead{font-size:clamp(1.05rem,1.6vw,1.2rem);max-width:62ch;color:#c9d3dd;margin:0}
.section-lead{color:var(--muted);max-width:62ch;margin:0 0 2rem}

/* Hero */
.hero{position:relative;padding:clamp(4rem,10vw,7.5rem) 0 clamp(3rem,7vw,5rem);isolation:isolate}
.hero::before{content:"";position:absolute;inset:-20% -30% -40%;z-index:-1;background:radial-gradient(45% 45% at 80% 25%,#5eead424,transparent 70%),radial-gradient(35% 35% at 10% 55%,#a5b4fc1a,transparent 70%);pointer-events:none}
.hero-grid{position:absolute;inset:0 -50vw;z-index:-1;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(60% 70% at 50% 30%,#000,transparent);mask-image:radial-gradient(60% 70% at 50% 30%,#000,transparent)}
.kicker{display:inline-flex;align-items:center;gap:.5rem;margin:0 0 1.4rem;padding:.3rem .8rem;border:1px solid var(--line2);border-radius:999px;font-size:.85rem;color:var(--muted);background:#11192399}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px #5eead426}
.hero h1{background:linear-gradient(180deg,#fff 30%,#b9c6d3);-webkit-background-clip:text;background-clip:text;color:transparent}
.cta{display:flex;flex-wrap:wrap;gap:.75rem;margin:2rem 0 0}
.button{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:50px;padding:.75rem 1.4rem;border-radius:12px;border:1px solid var(--line2);color:var(--ink);background:var(--surface);text-decoration:none;font-weight:600;font-size:1rem;transition:transform .15s ease,background .15s ease,border-color .15s ease}
.button:hover{color:var(--ink);border-color:var(--muted);transform:translateY(-1px)}
.button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.button.primary:hover{background:#99f6e4;border-color:#99f6e4;color:var(--accent-ink)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;margin:3.2rem 0 0;max-width:760px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stats div{display:flex;flex-direction:column-reverse;padding:1rem 1.1rem;background:var(--bg)}
.stats dt{color:var(--muted);font-size:.85rem;line-height:1.3}
.stats dd{margin:0;font-size:2rem;font-weight:700;letter-spacing:-.03em;color:var(--ink)}
@media (max-width:600px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Sections */
.section{margin:0 0 clamp(3.5rem,8vw,6rem)}
.section > h2::before{content:"";display:block;width:36px;height:3px;margin-bottom:1rem;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.prose p,.prose li{max-width:72ch}
.prose ul{padding-left:1.2rem}
.prose li{margin:.35rem 0}
.prose li::marker{color:var(--accent)}
.page-head{padding:clamp(3rem,8vw,5rem) 0 clamp(2rem,5vw,3rem);border-bottom:1px solid var(--line);margin-bottom:clamp(2.5rem,6vw,4rem)}
.page-head h1{max-width:24ch}

/* Cards */
.card{position:relative;background:linear-gradient(180deg,var(--surface),#0e151d);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem}
.group + .group{margin-top:2.4rem}
.group-title{font-size:.8rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 1rem}
.project-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem}
@media (max-width:820px){.project-grid{grid-template-columns:minmax(0,1fr)}}
.project{display:flex;flex-direction:column;gap:.2rem;transition:border-color .2s ease,transform .2s ease}
.project:hover{border-color:var(--line2);transform:translateY(-2px)}
.project p{margin:.35rem 0;color:#c4ced8}
.project-top{display:flex;align-items:center;gap:1rem;margin-bottom:.6rem}
.project-top img,.detail-head img{border-radius:18px;border:1px solid var(--line2);background:var(--bg2)}
.project h3 a{color:var(--ink);text-decoration:none}.project h3 a:hover{color:var(--accent)}
.meta{display:flex;flex-wrap:wrap;gap:.4rem;margin:0 0 .3rem!important}
.kind,.status{display:inline-block;padding:.12rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600;letter-spacing:.04em;border:1px solid var(--line2);color:var(--muted)}
.status.released{color:var(--accent);border-color:#5eead455;background:#5eead414}
.status.in-development{color:var(--warn);border-color:#fbbf2455;background:#fbbf2412}
.tagline{font-weight:600;color:var(--ink)!important}
.platforms{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.6rem!important}
.platforms span{font-size:.78rem;padding:.1rem .5rem;border-radius:6px;background:var(--bg2);color:var(--muted);border:1px solid var(--line)}
.links{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:auto!important;padding-top:.9rem}
.chip{display:inline-flex;align-items:center;gap:.4rem;min-height:40px;padding:.35rem .85rem;border-radius:10px;border:1px solid var(--line2);color:var(--ink);text-decoration:none;font-size:.9rem;font-weight:600;background:var(--bg2)}
.chip .i{width:16px;height:16px;color:var(--accent)}
.chip:hover{border-color:var(--accent);color:var(--ink)}

/* Project detail page */
.detail{padding-bottom:clamp(2.5rem,6vw,4rem);border-bottom:1px solid var(--line);scroll-margin-top:90px}
.detail:last-child{border-bottom:0}
.detail-head{display:flex;align-items:center;gap:1.4rem;margin-bottom:1.2rem}
.detail-head h2{margin:.2rem 0 .3rem}
.detail-head .tagline{margin:0;color:var(--muted)!important;font-weight:500}
.detail > p{max-width:72ch;color:#c9d3dd}
.checks{list-style:none;padding:0;margin:1.2rem 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.6rem 1.4rem}
@media (max-width:700px){.checks{grid-template-columns:minmax(0,1fr)}.detail-head img{width:84px;height:84px}}
.checks li{position:relative;padding-left:1.7rem;color:#c9d3dd}
.checks li::before{content:"";position:absolute;left:0;top:.45em;width:1rem;height:.55rem;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg) scale(.8)}

/* Tables */
.table-wrap{overflow-x:auto;margin:1.2rem 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:.75rem 1rem;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child th,tr:last-child td{border-bottom:0}
thead th{background:var(--surface2);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
tbody th{width:32%;color:var(--muted);font-weight:500}

/* About teaser */
.about-teaser{display:grid;grid-template-columns:minmax(0,1fr);max-width:820px}
.about-teaser p{color:#c9d3dd}
.more{display:inline-flex;align-items:center;gap:.35rem;font-weight:600;text-decoration:none}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}
@media (max-width:980px){.contact-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.contact-grid{grid-template-columns:minmax(0,1fr)}}
.contact-card{display:flex;flex-direction:column;gap:.25rem;color:var(--ink);text-decoration:none;transition:border-color .2s ease,transform .2s ease}
.contact-card:hover{border-color:var(--accent);color:var(--ink);transform:translateY(-2px)}
.contact-card .i{width:26px;height:26px;color:var(--accent);margin-bottom:.6rem}
.contact-card .label{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.contact-card strong{font-size:1.05rem;word-break:break-word}
.contact-card address{font-style:normal;font-weight:600;font-size:.98rem;line-height:1.45}
.contact-card .note{margin-top:auto;padding-top:.6rem;font-size:.85rem;color:var(--dim)}
.contact-alt{margin-top:1.3rem;color:var(--muted);font-size:.92rem}
.contact-alt .i{width:16px;height:16px;color:var(--dim)}

/* FAQ */
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.15rem 0;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{font-size:1.05rem;font-weight:600}
.faq summary::after{content:"+";flex:none;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid var(--line2);color:var(--accent);font-size:1.2rem;transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 1.2rem;max-width:72ch;color:#c4ced8}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg2);padding:2.5rem max(16px,calc((100vw - var(--max))/2)) 2rem;color:var(--muted);font-size:.9rem}
.site-footer p{margin:.45rem 0}
.site-footer a{color:var(--muted)}.site-footer a:hover{color:var(--ink)}
.footer-brand{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem 1.2rem;margin-bottom:1rem}
.footer-brand .brand{color:var(--ink)}
.footer-org{margin:1rem 0 1.2rem;padding:1rem 0;border-block:1px solid var(--line)}
.footer-org strong{color:var(--ink)}

code{font-family:var(--mono);font-size:.9em;color:var(--accent2)}

/* Motion (only when JS runs and the user allows motion) */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.lang-suggest{display:none}body{background:#fff;color:#000}}
.downloads{display:inline-block;padding:.12rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600;letter-spacing:.02em;color:var(--accent2);border:1px solid #a5b4fc55;background:#a5b4fc14}