:root{
  --bg:#080b12;--bg-2:#0c111c;--surface:#121826;--surface-2:#171f30;
  --line:#212a3e;--line-2:#2b3651;
  --fg:#e9eefb;--muted:#94a2bd;--dim:#6b7791;
  --brand:#38c6ff;--brand-2:#7c5cff;--accent:#2fe6a6;--warn:#ffb648;
  --glow:0 0 0 1px rgba(56,198,255,.35),0 14px 40px rgba(56,198,255,.16);
  --radius:15px;--radius-sm:11px;--maxw:1080px;
  --shadow:0 2px 6px rgba(0,0,0,.4),0 16px 40px rgba(0,0,0,.4);
  --sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  --display:'Chakra Petch','Inter',system-ui,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{font-size:17px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--fg);background:var(--bg);line-height:1.62;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(60% 50% at 80% -5%,rgba(56,198,255,.10),transparent 60%),
                   radial-gradient(50% 45% at 5% 0%,rgba(124,92,255,.10),transparent 55%);
  background-attachment:fixed}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--display);line-height:1.13;letter-spacing:-.01em;font-weight:700}
h1{font-size:clamp(1.75rem,4.4vw,2.6rem);margin:.3em 0 .35em}
h2{font-size:clamp(1.3rem,2.6vw,1.65rem);margin:1.7em 0 .5em}
h3{font-size:1.16rem;margin:1.3em 0 .4em}
p{margin:.65em 0}
strong{color:#fff}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:var(--brand);color:#04121c;padding:8px 12px;border-radius:8px;z-index:20}

/* header */
.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);
  background:rgba(8,11,18,.78);backdrop-filter:saturate(1.6) blur(12px)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:700;font-size:1.22rem;color:#fff;display:flex;align-items:center;gap:10px;letter-spacing:.01em;text-transform:none}
.brand:hover{text-decoration:none}
.brand::before{content:"";width:24px;height:24px;border-radius:7px;
  background:conic-gradient(from 200deg,var(--brand),var(--brand-2),var(--brand));
  box-shadow:0 0 14px rgba(56,198,255,.7)}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--muted);font-size:.93rem;font-weight:600;padding:7px 12px;border-radius:9px}
.nav a:hover{color:#fff;background:rgba(56,198,255,.12);text-decoration:none}

main.wrap{padding-top:8px;padding-bottom:10px}

/* hero */
.hero{position:relative;overflow:hidden;margin:20px 0 34px;padding:60px 36px;border-radius:22px;
  text-align:center;border:1px solid var(--line);
  background:radial-gradient(80% 120% at 12% 0%,rgba(124,92,255,.38),transparent 52%),
             radial-gradient(70% 120% at 90% 8%,rgba(56,198,255,.34),transparent 52%),
             linear-gradient(160deg,#0e1424,#0a0e18)}
.hero::before{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(100% 100% at 50% 0%,#000,transparent 75%)}
.hero>*{position:relative;z-index:1}
.hero h1{color:#fff;font-size:clamp(2.1rem,5.6vw,3.3rem);margin:0;text-shadow:0 0 28px rgba(56,198,255,.45)}
.hero .lead{color:#cdd6f5;font-size:1.22rem;font-weight:600;margin:.45em auto 0;max-width:54ch}
.hero-intro{color:#a9b4d4;max-width:66ch;margin:16px auto 0;font-size:1.02rem}
.hero-intro strong{color:#fff}

/* category blocks */
.cat-block{margin:36px 0}
.cat-head h2{margin:0 0 2px;display:flex;align-items:center;gap:10px}
.cat-head h2::before{content:"";width:5px;height:24px;border-radius:3px;background:linear-gradient(var(--brand),var(--brand-2));box-shadow:0 0 12px rgba(56,198,255,.6)}
.cat-head h2 a{color:#fff}
.cat-desc{color:var(--muted);margin:0 0 16px;max-width:72ch}

/* cards */
.card-grid{list-style:none;padding:0;margin:16px 0;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(252px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;height:100%;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}
.card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--glow);text-decoration:none}
.card-thumb{display:block;aspect-ratio:600/338;overflow:hidden;background:#0c1019;position:relative}
.card-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(10,13,20,.55))}
.card-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease}
.card:hover .card-thumb img{transform:scale(1.06)}
.card-body{padding:14px 16px 17px;display:flex;flex-direction:column;gap:5px}
.card-title{font-family:var(--display);font-weight:600;font-size:1.06rem;color:#fff}
.card-desc{color:var(--muted);font-size:.9rem;line-height:1.45}

.breadcrumbs{font-size:.85rem;color:var(--dim);margin:18px 0 6px}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--brand)}

.tool-page{max-width:760px}
.intro{color:var(--muted);font-size:1.06rem}

/* calculator HUD */
.tool-widget{position:relative;background:linear-gradient(180deg,var(--surface),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:22px 0;box-shadow:var(--shadow)}
.tool-widget::before{content:"";position:absolute;left:0;top:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--brand),var(--brand-2),transparent);opacity:.7}
.field{margin:13px 0}
.field label{display:block;font-weight:600;font-size:.86rem;margin-bottom:6px;color:var(--fg);
  text-transform:uppercase;letter-spacing:.04em}
.field .hint{color:var(--dim);font-weight:400;font-size:.8rem;text-transform:none;letter-spacing:0}
input,select,textarea{width:100%;font:inherit;color:#fff;background:var(--bg);
  border:1.5px solid var(--line-2);border-radius:10px;padding:11px 13px;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(56,198,255,.25)}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>.field{flex:1;min-width:150px}
button,.btn{font:inherit;font-weight:700;cursor:pointer;border:0;border-radius:10px;padding:12px 20px;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));color:#06131e;
  box-shadow:0 6px 22px rgba(56,198,255,.32)}
button:hover,.btn:hover{filter:brightness(1.08)}

.result{margin-top:20px;padding:22px;border-radius:var(--radius-sm);
  background:radial-gradient(120% 130% at 0% 0%,rgba(47,230,166,.10),transparent 55%),var(--bg);
  border:1px solid var(--line-2)}
.result .label{color:var(--dim);font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;font-weight:600}
.result .big{font-family:var(--display);font-size:2.5rem;font-weight:700;color:var(--accent);
  letter-spacing:-.01em;line-height:1.1;text-shadow:0 0 22px rgba(47,230,166,.5)}
.gs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:11px;margin-top:16px}
.gs-grid>div{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-weight:600;color:#fff}
.gs-grid .label{display:block;margin-bottom:4px}
.gs-warn{margin-top:14px;color:var(--warn);font-weight:600;font-size:.92rem}

table{border-collapse:collapse;width:100%;margin:12px 0;font-size:.95rem}
th,td{text-align:left;padding:10px 13px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}
.gs-tiers{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;margin-top:20px}
.gs-tiers caption{text-align:left;color:var(--muted);font-size:.85rem;padding:13px 14px 2px;font-weight:600;font-family:var(--display)}
.gs-tiers th,.gs-tiers td{padding:11px 14px}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(56,198,255,.05)}

.prose{max-width:720px;color:#c7d0e4}
.prose h2,.prose h3{color:#fff;margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.25em}
.prose li{margin:.3em 0}
.prose a{color:var(--brand)}
.prose code{font-family:var(--mono);background:rgba(56,198,255,.12);color:#bfe6ff;padding:1px 6px;border-radius:6px;font-size:.9em}
.prose .cpu-note,.prose .caveat{background:var(--surface);border:1px solid var(--line);
  border-left:3px solid var(--brand);border-radius:8px;padding:11px 15px}

.faq details{border:1px solid var(--line);border-radius:11px;padding:3px 16px;margin:9px 0;background:var(--surface);transition:border-color .15s}
.faq details[open]{border-color:var(--brand)}
.faq summary{cursor:pointer;font-weight:600;padding:12px 0;list-style:none;color:#fff}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:700;font-size:1.25rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details>div{padding:0 0 13px;color:var(--muted)}

.ad-slot{margin:20px 0;min-height:1px}
.related{margin-top:40px;border-top:1px solid var(--line);padding-top:12px}

.site-footer{border-top:1px solid var(--line);margin-top:60px;padding:32px 0;color:var(--muted);font-size:.9rem;background:var(--bg-2)}
.disclosure{font-size:.82rem;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:11px 15px;max-width:760px}
.foot-nav{display:flex;gap:18px;flex-wrap:wrap;margin:14px 0}
.foot-nav a{color:var(--muted);font-weight:600}
.foot-nav a:hover{color:var(--brand)}
.copy{font-size:.82rem;max-width:760px;color:var(--dim)}
.static-page{max-width:720px;color:#c7d0e4}
.static-page h1,.static-page h2{color:#fff}

@media (max-width:560px){
  html{font-size:16px}
  .hero{padding:42px 22px;border-radius:18px}
  .card-grid{grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:13px}
}