:root{
  --bg:#0f1419; --panel:#171d26; --panel2:#1e2733; --ink:#e7edf3; --muted:#9aa7b4;
  --line:#2a3441; --e4b:#4b9fe0; --m26:#f0883e; --tau:#8b98a6;
  --good:#3fb27f; --warn:#e8b94a; --bad:#e06c75; --accent:#7aa2f7;
  --maxw:1100px; --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);
  line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
code,.mono{font-family:var(--mono);font-size:.92em}

/* nav */
nav{position:sticky;top:0;z-index:20;background:rgba(15,20,25,.88);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
nav .wrap{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:18px;
  padding:10px 22px;flex-wrap:wrap}
nav .brand{font-weight:700;letter-spacing:.2px}
nav .brand small{color:var(--muted);font-weight:400}
nav .links{display:flex;gap:16px;margin-left:auto;flex-wrap:wrap}
nav .links a{color:var(--muted);font-size:.9rem}
nav .links a:hover{color:var(--ink);text-decoration:none}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
header.hero{padding:46px 22px 30px;border-bottom:1px solid var(--line);
  background:radial-gradient(1200px 400px at 20% -10%,rgba(75,159,224,.10),transparent),
             radial-gradient(1000px 400px at 90% -20%,rgba(240,136,62,.10),transparent)}
header.hero .wrap{padding:0 0}
h1{font-size:2.0rem;margin:0 0 6px;line-height:1.15}
.sub{color:var(--muted);font-size:1.05rem;max-width:760px}
.vs{display:inline-flex;gap:8px;align-items:center;margin:16px 0 8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:7px;padding:5px 11px;border-radius:999px;
  border:1px solid var(--line);background:var(--panel);font-size:.86rem}
.chip .dot{width:9px;height:9px;border-radius:50%}
.dot.e4b{background:var(--e4b)} .dot.m26{background:var(--m26)}
.metabar{display:flex;gap:22px;flex-wrap:wrap;margin-top:14px;color:var(--muted);font-size:.85rem}
.metabar b{color:var(--ink);font-weight:600}

section{padding:40px 0 8px}
h2{font-size:1.4rem;margin:0 0 4px;display:flex;align-items:center;gap:10px}
h2 .num{color:var(--accent);font-family:var(--mono);font-size:1rem}
.lead{color:var(--muted);margin:.2rem 0 22px;max-width:820px}

/* overview cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(235px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 17px;
  position:relative;overflow:hidden}
.card h3{margin:0 0 2px;font-size:1.05rem}
.card .knob{color:var(--muted);font-size:.78rem;margin-bottom:12px}
.badge{display:inline-block;padding:3px 9px;border-radius:6px;font-size:.74rem;font-weight:600;
  letter-spacing:.3px}
.badge.div{background:rgba(224,108,117,.16);color:#f29aa1;border:1px solid rgba(224,108,117,.35)}
.badge.equiv{background:rgba(63,178,127,.15);color:#7fd6ad;border:1px solid rgba(63,178,127,.35)}
.badge.mild{background:rgba(232,185,74,.14);color:#f0cf86;border:1px solid rgba(232,185,74,.33)}
.fr{display:flex;gap:14px;margin-top:12px}
.fr .col{flex:1}
.fr .lbl{font-size:.72rem;color:var(--muted)}
.fr .val{font-family:var(--mono);font-size:1.25rem;font-weight:600}
.fr .val.e4b{color:var(--e4b)} .fr .val.m26{color:var(--m26)}
.card .foot{margin-top:12px;font-size:.8rem;color:var(--muted)}
.card .foot b{color:var(--ink)}

/* family panels */
.fam{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;
  margin-bottom:22px}
.fam .top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap}
.fam h3{margin:0;font-size:1.25rem}
.fam .desc{color:var(--muted);font-size:.9rem;max-width:640px;margin-top:3px}
.chartbox{margin:14px 0 6px}
.chartbox svg{width:100%;height:auto;display:block}
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:8px 0 4px}
.stat{background:var(--panel2);border:1px solid var(--line);border-radius:9px;padding:10px 12px}
.stat .lbl{font-size:.72rem;color:var(--muted)}
.stat .v{font-family:var(--mono);font-size:1.05rem;margin-top:2px}
.stat .v.big{font-size:1.3rem}
.pill{font-size:.7rem;padding:2px 7px;border-radius:5px;border:1px solid var(--line);color:var(--muted)}

details{margin-top:12px;border:1px solid var(--line);border-radius:9px;background:var(--panel2)}
details>summary{cursor:pointer;padding:10px 14px;font-weight:600;font-size:.92rem;list-style:none}
details>summary::-webkit-details-marker{display:none}
details>summary::before{content:"▸ ";color:var(--accent)}
details[open]>summary::before{content:"▾ "}
.fail{padding:0 14px 12px}
.fail .case{border-top:1px solid var(--line);padding:11px 0}
.fail .meta{font-size:.78rem;color:var(--muted);margin-bottom:6px}
.fail .meta b{color:var(--ink)}
.fail pre{background:#0b0f14;border:1px solid var(--line);border-radius:7px;padding:10px 12px;
  overflow:auto;font-family:var(--mono);font-size:.8rem;color:#cdd6e0;margin:0;white-space:pre-wrap;
  word-break:break-word;max-height:240px}
.note{background:rgba(122,162,247,.08);border:1px solid rgba(122,162,247,.3);border-radius:9px;
  padding:11px 14px;font-size:.88rem;color:#bcd0f5;margin-top:12px}
.note.warn{background:rgba(232,185,74,.08);border-color:rgba(232,185,74,.3);color:#ecd79a}

table{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:6px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.4px}
tbody tr:hover{background:var(--panel2)}
td .tag{font-family:var(--mono);font-size:.84rem}
.safe{color:var(--good);font-weight:600}
.route26{color:var(--m26);font-weight:600}

ul.tight{margin:.3rem 0 .6rem;padding-left:20px}
ul.tight li{margin:4px 0}
.bug{border-left:3px solid var(--bad);padding:4px 0 4px 12px;margin:10px 0}
.bug b{color:#f29aa1}
.fix{border-left:3px solid var(--good);padding:4px 0 4px 12px;margin:10px 0}
.fix b{color:#7fd6ad}

footer{border-top:1px solid var(--line);margin-top:46px;padding:26px 22px 50px;color:var(--muted);
  font-size:.84rem}
footer code{color:var(--ink)}

/* tooltip */
#tt{position:fixed;pointer-events:none;z-index:99;background:#0b0f14;border:1px solid var(--line);
  border-radius:8px;padding:8px 10px;font-size:.78rem;color:var(--ink);opacity:0;transition:opacity .08s;
  box-shadow:0 6px 22px rgba(0,0,0,.5);max-width:240px;font-family:var(--mono)}
#tt .h{font-family:var(--sans);font-weight:700;margin-bottom:4px}
#tt .e4b{color:var(--e4b)} #tt .m26{color:var(--m26)}

@media(max-width:640px){ h1{font-size:1.6rem} .metabar{gap:12px} }