/* ScoreLab — graphite + perak monokrom (revenue.family system) */
:root {
  --g0: #0c0d0f; --g1: #131417; --g2: #1a1b1f; --g3: #23252a; --g4: #2e3036;
  --bg: var(--g0); --panel: var(--g2); --panel2: var(--g1);
  --border: rgba(255,255,255,.12); --border2: rgba(255,255,255,.2);
  --text: #eef0f2; --muted: #a3a8b0; --dim: #9398a1;
  --silver: linear-gradient(180deg,#fff 0%,#e4e7eb 45%,#b7bdc5 100%);
  --silver-ink: #0b0c0e; --silver-glow: rgba(225,230,238,.22);
  --warn: #f2c14e; --live: #ff6b6b;
  --acc-soft: rgba(255,255,255,.07);
  --bg-shade: linear-gradient(172deg,#2b2d32 0%,#212327 55%,rgba(33,35,39,0) 100%);
  --glow-a: rgba(220,225,232,.09); --glow-b: rgba(255,255,255,.035);
  --dot-c: rgba(255,255,255,.075);
  --card-hi: rgba(255,255,255,.045); --card-lo: rgba(255,255,255,.015);
  --glass-hi: rgba(255,255,255,.075); --glass-lo: rgba(255,255,255,.028);
  --nav-bg: rgba(19,20,23,.82); --inset-hi: rgba(255,255,255,.14);
  --r: 22px; --r-sm: 10px;
  --ease: cubic-bezier(.2,.8,.2,1);
  --mono: "JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans: Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  color-scheme: dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 var(--sans);
  -webkit-font-smoothing:antialiased;padding-bottom:76px;overflow-x:hidden;min-height:100vh}
a{color:inherit;text-decoration:none}
::selection{background:rgba(220,225,232,.35)}
:focus-visible{outline:2px solid var(--border2);outline-offset:2px}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0 0 .6em}
h1{font-size:clamp(30px,5vw,44px);font-weight:800;letter-spacing:-.04em}
h2{font-size:clamp(21px,3vw,26px);font-weight:750;margin-top:2.2em}
h3{font-size:18px;font-weight:700}
p{margin:0 0 1.1em;color:var(--muted)}
p strong,.prose strong{color:var(--text)}

/* backdrop */
.bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none;
  background:linear-gradient(180deg,var(--g2) 0%,var(--g1) 40%,var(--g0) 100%)}
.bg::before{content:"";position:absolute;left:-10%;right:-10%;top:-30%;height:80%;
  background:var(--bg-shade);
  clip-path:polygon(0 0,100% 0,100% 58%,0 100%)}
.bg::after{content:"";position:absolute;inset:0;
  background:radial-gradient(900px 520px at 80% 16%,var(--glow-a),transparent 60%),
  radial-gradient(700px 500px at 6% 72%,var(--glow-b),transparent 60%)}
.bg .dots{position:absolute;inset:0;opacity:.4;
  background-image:radial-gradient(var(--dot-c) 1px,transparent 1.3px);
  background-size:26px 26px;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.35) 55%,transparent 90%);
  mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.35) 55%,transparent 90%)}
.topbar,.wrap,.bottomnav,.footer{position:relative;z-index:1}

/* header pill glass */
.topbar{position:sticky;top:0;z-index:50;padding:10px 10px 0}
.topbar-in{max-width:46rem;margin:0 auto;display:flex;align-items:center;gap:12px;
  height:58px;padding:0 9px 0 16px;border-radius:999px;
  background:linear-gradient(180deg,var(--glass-hi),var(--glass-lo));
  border:1px solid var(--border);
  backdrop-filter:blur(24px) saturate(150%);-webkit-backdrop-filter:blur(24px) saturate(150%);
  box-shadow:inset 0 1px 0 var(--inset-hi),0 20px 44px -22px rgba(0,0,0,.9)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em}
.brand .mark{width:30px;height:30px;border-radius:9px;background:var(--silver);
  display:grid;place-items:center;color:var(--silver-ink);font-family:var(--mono);
  font-size:13px;font-weight:700}
.brand small{font-family:var(--mono);font-size:10px;color:var(--dim);font-weight:400;
  letter-spacing:.14em;text-transform:uppercase}
.nav{margin-left:auto;display:flex;gap:4px}
.nav a{font-size:13px;color:var(--muted);padding:8px 12px;border-radius:999px}
.nav a:hover{color:var(--text);background:var(--acc-soft)}
.nav a.cta{background:var(--silver);color:var(--silver-ink);font-weight:700}
@media(max-width:560px){.nav a:not(.cta){display:none}}

/* layout */
.wrap{max-width:46rem;margin:0 auto;padding:0 20px}
.hero{padding:72px 0 40px;text-align:left}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.kicker::before{content:"";width:22px;height:1px;background:var(--border2)}
.hero p.lead{font-size:17px;max-width:34rem}
.silver-text{background:var(--silver);-webkit-background-clip:text;background-clip:text;color:transparent}

/* article cards */
.grid{display:grid;gap:14px;margin:34px 0 60px}
@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}
.card{display:block;background:linear-gradient(180deg,var(--card-hi),var(--card-lo));
  border:1px solid var(--border);border-radius:var(--r);padding:22px;
  transition:transform .35s var(--ease),border-color .35s,box-shadow .35s}
.card:hover{transform:translateY(-3px);border-color:var(--border2);
  box-shadow:0 24px 50px -30px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.04)}
.card .tag{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);margin-bottom:10px;display:block}
.card h3{font-size:18px;margin:0 0 8px}
.card p{font-size:13.5px;margin:0 0 12px}
.card .meta{font-family:var(--mono);font-size:11px;color:var(--dim);display:flex;gap:12px}
.card.featured{grid-column:1/-1;padding:28px;
  background:linear-gradient(160deg,var(--card-hi),var(--card-lo))}
.card.featured h3{font-size:clamp(20px,3.4vw,26px)}

/* article page */
.article-head{padding:56px 0 8px}
.article-head h1{max-width:40rem}
.article-meta{display:flex;gap:14px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;
  color:var(--dim);margin:16px 0 30px}
.prose{font-size:16px}
.prose p{margin-bottom:1.25em}
.prose ul,.prose ol{color:var(--muted);margin:0 0 1.25em;padding-left:1.4em}
.prose li{margin-bottom:.5em}
.prose table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14px}
.prose th{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--dim);text-align:left;padding:10px 12px;border-bottom:1px solid var(--border2)}
.prose td{padding:10px 12px;border-bottom:1px solid var(--border);color:var(--muted)}
.prose td:first-child{color:var(--text);font-weight:600}
@media(max-width:640px){
.prose table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.prose th,.prose td{padding:8px 10px;font-size:13px;white-space:nowrap}
.prose td:first-child{white-space:normal;min-width:110px}
.seo-sec{padding:22px}
.share a,.share button{padding:8px 12px;font-size:12.5px}
}
.prose blockquote{margin:1.6em 0;padding:4px 0 4px 18px;border-left:2px solid var(--border2);
  color:var(--text);font-size:17px}
.faq{margin:2.4em 0}
.faq details{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-sm);
  margin-bottom:10px;overflow:hidden}
.faq summary{padding:15px 18px;cursor:pointer;font-weight:650;font-size:15px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{padding:0 18px 16px;margin:0;font-size:14.5px}

/* engine callout */
.engine{margin:2.6em 0;padding:26px;border-radius:var(--r);
  background:linear-gradient(160deg,var(--card-hi),var(--card-lo));
  border:1px solid var(--border2);position:relative;overflow:hidden}
.engine::before{content:"";position:absolute;inset:0;
  background:radial-gradient(400px 200px at 90% 0%,var(--silver-glow),transparent 65%);
  pointer-events:none}
.engine .elabel{font-family:var(--mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--dim);margin-bottom:10px}
.engine h3{margin:0 0 8px}
.engine p{font-size:14.5px;margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--silver);color:var(--silver-ink);
  font-weight:750;font-size:14px;padding:12px 22px;border-radius:999px;border:0;cursor:pointer;
  transition:transform .3s var(--ease),box-shadow .3s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px -12px var(--silver-glow)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border2)}

/* footer + bottom nav */
.footer{border-top:1px solid var(--border);margin-top:70px;padding:34px 0 20px}
.footer-in{max-width:46rem;margin:0 auto;padding:0 20px;display:flex;gap:20px;flex-wrap:wrap;
  align-items:center;justify-content:space-between}
.footer p{font-size:12.5px;margin:0}
.footer .flinks{display:flex;gap:8px 16px;font-size:12.5px;color:var(--dim);flex-wrap:wrap;row-gap:8px}
@media(max-width:560px){.footer-in{flex-direction:column;align-items:flex-start;gap:14px}}
.bottomnav{position:fixed;left:0;right:0;bottom:12px;z-index:50;display:flex;justify-content:center;
  pointer-events:none}
.bottomnav-in{pointer-events:auto;display:flex;gap:2px;padding:6px;border-radius:999px;
  background:var(--nav-bg);border:1px solid var(--border);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  box-shadow:0 18px 40px -18px rgba(0,0,0,.9)}
.bottomnav a{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);padding:10px 16px;border-radius:999px}
.bottomnav a.on,.bottomnav a:hover{color:var(--silver-ink);background:var(--silver);font-weight:700}
@media(min-width:720px){.bottomnav{display:none}body{padding-bottom:0}}

/* images */
.hero-img{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--border);margin:26px 0 8px;padding-top:56.25%}
.hero-img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.85)}
.card .thumb{position:relative;display:block;border-radius:14px;overflow:hidden;border:1px solid var(--border);margin-bottom:14px;padding-top:62.5%}
.card .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.85);
  transition:transform .5s var(--ease)}
.card:hover .thumb img{transform:scale(1.03)}
.img-credit{font-family:var(--mono);font-size:10px;color:var(--dim);letter-spacing:.06em;margin-top:8px}
.backbtn{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;
  letter-spacing:.04em;color:var(--muted);margin-bottom:20px;padding:6px 0}
.backbtn:hover{color:var(--text)}
/* share buttons */
.share{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 8px;align-items:center}
.share .slabel{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-right:4px}
.share a,.share button{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;
  padding:9px 15px;border-radius:999px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer}
.share a:hover,.share button:hover{color:var(--text);border-color:var(--border2);background:var(--acc-soft)}
/* seo content section */
.seo-sec{margin:20px 0 50px;padding:30px;border-radius:var(--r);border:1px solid var(--border);
  background:linear-gradient(180deg,var(--card-hi),var(--card-lo))}
.seo-sec h2{margin-top:0}
.seo-sec p{font-size:14.5px}
.sec-h{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim);
  margin:26px 0 4px;display:flex;align-items:center;gap:8px}
.sec-h::before{content:"";width:22px;height:1px;background:var(--border2)}
h2.sec-h{font-size:11px;font-weight:400;letter-spacing:.18em}

/* ---------- light mode: follows system setting ---------- */
@media (prefers-color-scheme: light){
:root{
--g0:#eceef1; --g1:#dfe2e7; --g2:#ffffff; --g3:#d3d7dd; --g4:#b9bec6;
--bg:var(--g0); --panel:#ffffff; --panel2:#f4f5f7;
--border:rgba(15,18,24,.12); --border2:rgba(15,18,24,.24);
--text:#14161a; --muted:#596068; --dim:#5d636b;
--silver:linear-gradient(180deg,#3a3e45 0%,#14161a 55%,#000 100%);
--silver-ink:#f4f5f7; --silver-glow:rgba(20,22,26,.16);
--acc-soft:rgba(15,18,24,.06);
--bg-shade:linear-gradient(172deg,#ffffff 0%,#e6e9ed 55%,rgba(230,233,237,0) 100%);
--glow-a:rgba(20,22,26,.05); --glow-b:rgba(20,22,26,.03);
--dot-c:rgba(15,18,24,.09);
--card-hi:rgba(255,255,255,.95); --card-lo:rgba(255,255,255,.65);
--glass-hi:rgba(255,255,255,.8); --glass-lo:rgba(255,255,255,.5);
--nav-bg:rgba(255,255,255,.88); --inset-hi:rgba(255,255,255,.7);
color-scheme:light;
}
body{background:var(--bg)}
.bg{background:linear-gradient(180deg,#ffffff 0%,var(--g1) 45%,var(--g0) 100%)}
.card,.engine,.faq details{box-shadow:0 18px 36px -28px rgba(15,18,24,.25)}
.topbar-in{box-shadow:inset 0 1px 0 var(--inset-hi),0 18px 36px -24px rgba(15,18,24,.28)}
.hero-img img,.card .thumb img{filter:saturate(.9)}
::selection{background:rgba(20,22,26,.18)}
}