:root{
  --bg:#0A0F1E;
  --bg-alt:#111827;
  --panel:#111827;
  --card:rgba(26,32,53,0.78);
  --card-border:rgba(99,102,241,0.32);
  --card-border-soft:rgba(99,102,241,0.18);
  --text:#F0EDE6;
  --text-dim:#94A3B8;
  --text-faint:#6B7A99;
  --accent:#6366F1;
  --accent-bright:#8b8ef5;
  --accent-soft:rgba(99,102,241,0.14);
  --teal:#14B8A6;
  --teal-soft:rgba(20,184,166,0.12);
  --amber:#f5a94e;
  --amber-soft:rgba(245,169,78,0.12);
  --red:#f3654f;
  --red-soft:rgba(243,101,79,0.12);
  --mono-bg:rgba(10,15,30,0.7);
  --radius:12px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(99,102,241,0.11), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(20,184,166,0.07), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:'Inter',sans-serif;
  line-height:1.5;
}
::selection{background:var(--accent-soft);color:var(--accent-bright);}
h1,h2,h3,.brand,.group-index{font-family:'Space Grotesk',sans-serif;}
code,.mono,.flow,.cmd,.badge,.qtag{font-family:'JetBrains Mono',monospace;}

/* ---------- Layout ---------- */
.app{display:grid;grid-template-columns:290px 1fr;min-height:100vh;}
@media (max-width:900px){.app{grid-template-columns:1fr;}}

/* ---------- Sidebar ---------- */
.sidebar{
  position:sticky;top:0;height:100vh;overflow-y:auto;
  background:rgba(17,24,39,0.85);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-right:1px solid var(--card-border-soft);
  padding:20px 16px 40px;
}
@media (max-width:900px){.sidebar{position:relative;height:auto;border-right:none;border-bottom:1px solid var(--card-border-soft);}}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--text);margin-bottom:4px;}
.brand .helm{color:var(--accent-bright);font-size:22px;}
.tagline{color:var(--text-faint);font-size:12px;margin:0 0 18px;letter-spacing:.02em;}
.search-wrap{position:relative;margin-bottom:10px;}
#search{
  width:100%;background:var(--bg-alt);border:1px solid var(--card-border);
  color:var(--text);border-radius:8px;padding:10px 12px 10px 34px;font-size:13px;
  font-family:'Inter',sans-serif;
}
#search:focus{outline:none;border-color:var(--accent);}
.search-wrap svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);opacity:.5;}
#match-count{font-size:11px;color:var(--text-faint);margin:6px 2px 16px;min-height:14px;}
.mode-row{display:flex;gap:8px;margin-bottom:20px;}
.mode-btn{
  flex:1;background:var(--bg-alt);border:1px solid var(--card-border);color:var(--text-dim);
  padding:8px 6px;border-radius:8px;font-size:11.5px;cursor:pointer;font-weight:600;
  transition:.15s;text-align:center;
}
.mode-btn:hover{border-color:var(--accent);color:var(--text);}
.mode-btn.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-bright);}
.nav-list{list-style:none;margin:0;padding:0;}
.nav-list li{margin-bottom:2px;}
.nav-list a{
  display:flex;justify-content:space-between;gap:8px;align-items:center;
  padding:8px 10px;border-radius:7px;color:var(--text-dim);text-decoration:none;font-size:13px;
  transition:.12s;
}
.nav-list a:hover{background:var(--bg-alt);color:var(--text);}
.nav-list a.current{background:var(--accent-soft);color:var(--accent-bright);}
.nav-list .n-count{font-size:10.5px;color:var(--text-faint);background:var(--bg-alt);padding:1px 6px;border-radius:20px;}
.sidebar-foot{margin-top:22px;padding-top:14px;border-top:1px solid var(--card-border-soft);font-size:11px;color:var(--text-faint);}

/* ---------- Main ---------- */
main{padding:34px 40px 100px;max-width:1180px;}
@media (max-width:700px){main{padding:24px 16px 80px;}}
.hero{margin-bottom:34px;}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--teal);font-size:11.5px;
  letter-spacing:.08em;text-transform:uppercase;font-weight:600;margin-bottom:12px;
}
.hero .eyebrow::before{content:"●";font-size:8px;color:var(--teal);}
.hero h1{font-size:clamp(28px,3.6vw,40px);margin:0 0 10px;line-height:1.1;font-weight:700;}
.hero h1 span{color:var(--accent-bright);}
.hero p{color:var(--text-dim);max-width:640px;font-size:14.5px;margin:0;}
.stat-row{display:flex;gap:22px;margin-top:22px;flex-wrap:wrap;}
.stat{
  background:var(--card);border:1px solid var(--card-border-soft);border-radius:9px;padding:10px 16px;min-width:100px;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.stat:hover{border-color:var(--card-border);transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,0.3);}
.stat b{display:block;font-size:20px;font-family:'Space Grotesk',sans-serif;color:var(--accent-bright);}
.stat span{font-size:11px;color:var(--text-faint);}

.group{margin-bottom:46px;scroll-margin-top:20px;}
.group-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid var(--card-border-soft);}
.group-index{color:var(--text-faint);font-size:12px;}
.group-head h2{font-size:19px;margin:0;font-weight:600;}
.group-head .count{margin-left:auto;font-size:11px;color:var(--text-faint);background:var(--bg-alt);padding:3px 10px;border-radius:20px;}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:14px;}
.card{
  background:var(--card);border:1px solid var(--card-border-soft);border-radius:var(--radius);
  padding:16px 17px;transition:border-color .2s,transform .2s,box-shadow .2s;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.card:hover{border-color:var(--card-border);transform:translateY(-3px);box-shadow:0 16px 32px rgba(0,0,0,0.3),0 0 0 1px rgba(99,102,241,0.08);}
.card.warn{border-left:3px solid var(--amber);}
.card.warn:hover{box-shadow:0 16px 32px rgba(0,0,0,0.3),0 0 0 1px rgba(245,169,78,0.1);}
.card.err{border-left:3px solid var(--red);}
.card.err:hover{box-shadow:0 16px 32px rgba(0,0,0,0.3),0 0 0 1px rgba(243,101,79,0.1);}
.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:8px;}
.card h3{font-size:14.5px;margin:0;font-weight:600;color:var(--text);}
.oneliner{
  display:inline-block;font-size:10.5px;font-weight:600;color:var(--accent-bright);
  background:var(--accent-soft);padding:3px 8px;border-radius:5px;white-space:nowrap;flex-shrink:0;
}
.card.warn .oneliner{color:var(--amber);background:var(--amber-soft);}
.card.err .oneliner{color:var(--red);background:var(--red-soft);}
.def{font-size:13px;color:var(--text-dim);margin:0 0 10px;}
.points{margin:0 0 10px;padding:0;list-style:none;}
.points li{font-size:12.5px;color:var(--text-dim);padding:2px 0 2px 16px;position:relative;}
.points li::before{content:"✓";position:relative;left:-16px;color:var(--teal);font-size:11px;}
.points.neg li::before{content:"✗";color:var(--red);}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:5px;font-size:10.5px;margin:0 0 10px;}
.flow .seg{background:var(--bg-alt);border:1px solid var(--card-border);color:var(--accent-bright);padding:3px 7px;border-radius:5px;}
.flow .arrow{color:var(--text-faint);font-size:11px;}
.qa{margin:0 0 10px;padding:8px 10px;background:var(--bg-alt);border-radius:7px;}
.qa .q{font-size:12px;color:var(--text);font-weight:600;margin-bottom:2px;}
.qa .q::before{content:"Q ";color:var(--teal);}
.qa .a{font-size:12px;color:var(--text-dim);margin:0;}
.qa + .qa{margin-top:-6px;}
.cmd{background:var(--mono-bg);border:1px solid var(--card-border-soft);border-radius:7px;padding:9px 11px;margin:0 0 10px;overflow-x:auto;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);}
.cmd div{font-size:11.5px;color:var(--teal);white-space:pre;padding:1px 0;}
.cmd div::before{content:"$ ";color:var(--text-faint);}
.note{font-size:11.5px;color:var(--amber);background:var(--amber-soft);padding:7px 10px;border-radius:7px;margin:0;}
.note::before{content:"⚠ correction / clarity — ";font-weight:600;}

/* Rapid mode: hide everything except title + oneliner */
body.rapid .detail{display:none !important;}
body.rapid .card{padding:12px 15px;}
body.rapid .cards{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));}

.hidden{display:none !important;}

/* Rapid-fire QA bank */
.qbank{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:10px;}
.qitem{background:var(--card);border:1px solid var(--card-border-soft);border-radius:8px;padding:10px 13px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:border-color .2s,transform .2s;}
.qitem:hover{border-color:var(--card-border);transform:translateY(-2px);}
.qitem .q{font-size:12.5px;color:var(--text-dim);margin:0 0 4px;}
.qitem .a{font-size:13.5px;color:var(--accent-bright);font-weight:600;margin:0;font-family:'JetBrains Mono',monospace;}

.reftable{width:100%;border-collapse:collapse;font-size:12.5px;}
.reftable th{text-align:left;color:var(--text-faint);font-weight:600;padding:6px 10px;font-size:11px;text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--card-border);}
.reftable td{padding:7px 10px;border-bottom:1px solid var(--card-border-soft);color:var(--text-dim);}
.reftable td.k{color:var(--text);font-weight:600;font-family:'JetBrains Mono',monospace;}
.reftable tr:hover td{background:var(--bg-alt);}

.back-top{
  position:fixed;bottom:22px;right:26px;background:rgba(99,102,241,0.85);border:1px solid rgba(99,102,241,0.5);
  color:#fff;width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  cursor:pointer;text-decoration:none;box-shadow:0 4px 16px rgba(0,0,0,.4);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:transform .2s,background .2s,box-shadow .2s;
}
.back-top:hover{color:#fff;background:var(--accent);transform:translateY(-3px);box-shadow:0 10px 24px rgba(99,102,241,0.35);}

@media print{
  .sidebar,.back-top{display:none;}
  .app{display:block;}
  body{background:#fff;color:#111;}
  .card{background:#fff;border:1px solid #ccc;break-inside:avoid;}
  .oneliner{background:#eef;color:#225;}
  .cmd{background:#f4f4f4;}
  .cmd div{color:#0a5;}
}