/* ===========================================================
   Blackwell, Decoded — shared stylesheet
   =========================================================== */
:root{
  --nv:#76b900; --nv-d:#5e9400; --nv-l:#9bd62a;
  --ink:#0c1108; --bg:#ffffff; --soft:#f5f7f1; --soft2:#eef2e6;
  --muted:#5c6654; --line:#e2e7d9; --line2:#d2dac4;
  --sb:#0d1310; --sb2:#141c14; --sb-fg:#c7d2bd; --sb-mut:#7f8c76;
  --warn:#b8860b; --warnbg:#fff8e6; --info:#2f6f8f;
  --shadow:0 1px 2px rgba(12,17,8,.06),0 8px 24px rgba(12,17,8,.06);
  --radius:14px; --maxw:860px; --sbw:266px;
  --mono:"SF Mono",ui-monospace,"Cascadia Code","Roboto Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);
  line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased;
}
a{color:var(--nv-d);text-decoration:none}
a:hover{text-decoration:underline}

/* progress bar at very top */
#scrollbar{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--nv),var(--nv-l));z-index:60;transition:width .1s linear}

/* ---------- layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{
  width:var(--sbw);flex:0 0 var(--sbw);background:var(--sb);color:var(--sb-fg);
  position:sticky;top:0;height:100vh;overflow-y:auto;padding:22px 0 40px;
}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:54px 40px 80px}

/* ---------- sidebar ---------- */
.brand{display:flex;align-items:center;gap:11px;padding:4px 22px 18px;text-decoration:none}
.brand .logo{width:30px;height:30px;flex:0 0 30px}
.brand b{color:#fff;font-size:16.5px;letter-spacing:.2px;line-height:1.15}
.brand span{display:block;color:var(--nv-l);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase}
.sb-prog{margin:2px 22px 14px;font-size:12px;color:var(--sb-mut)}
.sb-prog .track{height:6px;background:#28311f;border-radius:99px;overflow:hidden;margin-top:7px}
.sb-prog .fill{height:100%;width:0;background:linear-gradient(90deg,var(--nv),var(--nv-l));border-radius:99px;transition:width .4s ease}
.nav{list-style:none;margin:6px 0 0;padding:0}
.nav .sec{font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--sb-mut);padding:16px 22px 6px}
.nav a{
  display:flex;align-items:center;gap:10px;padding:8px 22px;color:var(--sb-fg);
  font-size:14px;border-left:3px solid transparent;text-decoration:none
}
.nav a:hover{background:var(--sb2);text-decoration:none}
.nav a.active{background:var(--sb2);border-left-color:var(--nv);color:#fff;font-weight:600}
.nav .num{font-family:var(--mono);font-size:11px;color:var(--sb-mut);width:18px;flex:0 0 18px}
.nav a.active .num{color:var(--nv-l)}
.nav .chk{margin-left:auto;width:16px;height:16px;flex:0 0 16px;opacity:0}
.nav a.done .chk{opacity:1}
.nav a.done .num{color:var(--nv)}

/* ---------- mobile top bar ---------- */
.topbar{display:none;position:sticky;top:0;z-index:40;background:var(--sb);color:#fff;
  align-items:center;gap:12px;padding:11px 16px}
.topbar b{font-size:15px}
.topbar .nv{color:var(--nv-l)}
.burger{background:none;border:0;cursor:pointer;padding:6px;display:flex}
.burger span{display:block;width:22px;height:2px;background:#fff;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:22px;height:2px;background:#fff}
.burger span::before{top:-7px}.burger span::after{top:7px}
.scrim{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:45}

/* ---------- hero / headings ---------- */
.kicker{font-size:12.5px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--nv-d)}
h1{font-size:38px;line-height:1.1;letter-spacing:-.01em;margin:.32em 0 .3em;font-weight:800}
h2{font-size:25px;line-height:1.2;margin:1.9em 0 .55em;font-weight:750;letter-spacing:-.01em;scroll-margin-top:78px}
h2 .hsh{color:var(--line2);font-weight:600;margin-right:.35em}
h3{font-size:18.5px;margin:1.6em 0 .4em;font-weight:700}
p{margin:.7em 0}
.lede{font-size:19.5px;line-height:1.55;color:#37402f}
.meta{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;color:var(--muted);font-size:13.5px;margin:14px 0 4px}
.meta .dot{width:4px;height:4px;border-radius:99px;background:var(--line2)}
hr{border:0;border-top:1px solid var(--line);margin:34px 0}

/* ---------- key-number stat cards ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:22px 0}
.stat{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 14px}
.stat .big{font-size:30px;font-weight:800;letter-spacing:-.02em;color:var(--nv-d);line-height:1}
.stat .lab{font-size:13px;color:var(--muted);margin-top:6px}
.stat.alt .big{color:var(--ink)}

/* ---------- callouts ---------- */
.callout{border:1px solid var(--line);border-left:4px solid var(--nv);background:var(--soft);
  border-radius:12px;padding:14px 18px;margin:20px 0}
.callout .t{font-weight:700;font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--nv-d);margin-bottom:3px}
.callout.key{border-left-color:var(--nv);background:#f3f8ea}
.callout.note{border-left-color:var(--info);background:#eef5f8}
.callout.note .t{color:var(--info)}
.callout.warn{border-left-color:var(--warn);background:var(--warnbg)}
.callout.warn .t{color:var(--warn)}
.callout p:first-child{margin-top:0}.callout p:last-child{margin-bottom:0}

/* ---------- tables ---------- */
.tablewrap{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:14.5px}
caption{caption-side:top;text-align:left;font-size:13px;color:var(--muted);padding:10px 14px 2px}
th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--soft2);font-size:12.5px;letter-spacing:.03em;text-transform:uppercase;color:#3c4632;position:sticky;top:0}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fafcf5}
td.num,th.num{font-family:var(--mono);font-variant-numeric:tabular-nums;text-align:right}
.hl{color:var(--nv-d);font-weight:700}

/* ---------- glossary inline term ---------- */
.gloss{border-bottom:1.5px dotted var(--nv);cursor:help;position:relative}
.tip{position:fixed;z-index:70;max-width:min(300px,calc(100vw - 24px));background:var(--ink);color:#eef3e6;
  font-size:13.5px;line-height:1.5;padding:11px 13px;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.28);
  opacity:0;transform:translateY(4px);transition:opacity .12s,transform .12s;pointer-events:none}
.tip.below{transform:translateY(-4px)}
.tip.show{opacity:1;transform:translateY(0)}
.tip b{color:var(--nv-l)}
/* caret: a rotated square merged into the bubble edge, pointing at the term (--ax set in JS) */
.tip::after{content:"";position:absolute;left:var(--ax,50%);bottom:-5px;width:11px;height:11px;
  background:var(--ink);border-radius:2px;transform:translateX(-50%) rotate(45deg)}
.tip.below::after{bottom:auto;top:-5px}

/* ---------- diagrams ---------- */
figure{margin:24px 0}
.diagram{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.diagram svg{display:block;width:100%;height:auto}
figcaption{font-size:13px;color:var(--muted);margin-top:9px;text-align:center}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;justify-content:center;margin-top:10px;font-size:12.5px;color:var(--muted)}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:-1px}

/* ---------- compare two-col ---------- */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}
.duo .card{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff}
.duo .card h4{margin:0 0 6px;font-size:15px}
.duo .card.win{border-color:var(--nv);background:#f3f8ea}
@media(max-width:620px){.duo{grid-template-columns:1fr}}

/* ---------- pills / chips ---------- */
.pill{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:99px;background:var(--soft2);color:#3c4632;margin:0 4px 4px 0}
.pill.g{background:#e7f3d4;color:var(--nv-d)}

/* ---------- list styling ---------- */
.content ul,.content ol{padding-left:22px;margin:.6em 0}
.content li{margin:.32em 0}
.content li::marker{color:var(--nv-d)}

/* ---------- complete button + pager ---------- */
.done-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:34px 0 0}
.btn{display:inline-flex;align-items:center;gap:9px;border:0;cursor:pointer;font-family:inherit;
  font-size:15px;font-weight:650;padding:11px 20px;border-radius:11px;background:var(--nv);color:#0c1108;transition:.15s}
.btn:hover{background:var(--nv-d);color:#fff;text-decoration:none}
.btn.ghost{background:transparent;border:1.5px solid var(--line2);color:var(--ink)}
.btn.ghost:hover{border-color:var(--nv);background:var(--soft);color:var(--ink)}
.btn.done-state{background:#eaf3da;color:var(--nv-d);cursor:default}
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:30px;padding-top:26px;border-top:1px solid var(--line)}
.pager a{flex:1;border:1px solid var(--line);border-radius:12px;padding:13px 16px;display:block;background:#fff;transition:.15s}
.pager a:hover{border-color:var(--nv);background:var(--soft);text-decoration:none}
.pager .dir{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.pager .ttl{font-weight:650;color:var(--ink);font-size:15px;margin-top:2px}
.pager a.next{text-align:right}
.pager a.disabled{opacity:.35;pointer-events:none}
@media(max-width:520px){.pager{flex-direction:column}}

/* ---------- index / landing ---------- */
.cardgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:16px;margin:24px 0}
.mcard{border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 16px;background:#fff;
  display:flex;flex-direction:column;transition:.16s;text-decoration:none;color:inherit;position:relative;box-shadow:var(--shadow)}
.mcard:hover{border-color:var(--nv);transform:translateY(-2px);text-decoration:none}
.mcard .n{font-family:var(--mono);font-size:12px;color:var(--nv-d);font-weight:600}
.mcard h3{margin:7px 0 5px;font-size:17px}
.mcard p{margin:0;font-size:14px;color:var(--muted);line-height:1.5}
.mcard .foot{margin-top:auto;padding-top:13px;font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:8px}
.mcard .badge{position:absolute;top:14px;right:14px;width:20px;height:20px;border-radius:99px;border:2px solid var(--line2);display:flex;align-items:center;justify-content:center}
.mcard.done .badge{background:var(--nv);border-color:var(--nv)}
.mcard.done .badge svg{display:block}
.mcard .badge svg{display:none;width:11px;height:11px}
.herobox{background:linear-gradient(135deg,#0d1310,#1d2a16 70%);color:#fff;border-radius:18px;padding:38px 34px;margin:8px 0 6px;position:relative;overflow:hidden}
.herobox::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;background:radial-gradient(circle,rgba(118,185,0,.32),transparent 70%)}
.herobox .kicker{color:var(--nv-l)}
.herobox h1{color:#fff;margin:.2em 0 .25em}
.herobox p{color:#cdd6c4;max-width:60ch;font-size:18px}
.bigprog{display:flex;align-items:center;gap:16px;margin:18px 0 0;flex-wrap:wrap}
.bigprog .track{flex:1;min-width:180px;height:9px;background:#28311f;border-radius:99px;overflow:hidden}
.bigprog .fill{height:100%;width:0;background:linear-gradient(90deg,var(--nv),var(--nv-l));transition:width .5s}
.bigprog .pct{font-weight:700;color:#fff;font-size:15px}
.reset{background:none;border:0;color:var(--sb-mut);font-size:12px;cursor:pointer;text-decoration:underline;margin-left:auto}

/* ---------- footer ---------- */
.foot-note{margin-top:46px;padding:22px 0 0;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.foot-note a{color:var(--muted);text-decoration:underline}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .sidebar{position:fixed;left:0;top:0;z-index:50;transform:translateX(-100%);transition:transform .25s ease;box-shadow:0 0 40px rgba(0,0,0,.3)}
  body.nav-open .sidebar{transform:translateX(0)}
  body.nav-open .scrim{display:block}
  .topbar{display:flex}
  .wrap{padding:30px 20px 64px}
  h1{font-size:30px}h2{font-size:22px}
  body{font-size:16px}
}
@media print{.sidebar,.topbar,.done-row,.pager,#scrollbar{display:none}.wrap{max-width:none}}