[hidden] { display: none !important; }
:root {
  --bg: #0b1a14; --bg2: #102219; --panel: #14291f; --line: #24463a;
  --text: #e8efe9; --muted: #9db3a8; --accent: #e9b949; --accent2: #4fd1a5;
  --good: #3ecf8e; --bad: #ff6b6b; --felt: #145c3c; --felt2: #0d4029;
  --heart: #e5484d; --diamond: #3b82f6; --club: #22a55b; --spade: #1f2328;
  --r: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent2); text-decoration: none; }
.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: rgba(11, 26, 20, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.brand { font-weight: 800; font-size: 18px; color: var(--accent); white-space: nowrap; }
nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
nav a { color: var(--muted); padding: 6px 10px; border-radius: 999px; white-space: nowrap; font-size: 14px; }
nav a.on { color: var(--bg); background: var(--accent); font-weight: 600; }
main { max-width: 920px; margin: 0 auto; padding: 18px 16px 40px; min-height: 70vh; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; border-top: 1px solid var(--line); }
h1 { font-size: 28px; line-height: 1.25; margin: 8px 0 12px; }
h2 { font-size: 21px; margin: 26px 0 10px; }
h3 { font-size: 17px; margin: 20px 0 8px; color: var(--accent); }
.muted { color: var(--muted); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; margin: 12px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.card-link { display: block; color: var(--text); background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; transition: border-color .15s, transform .15s; }
.card-link:hover { border-color: var(--accent); transform: translateY(-1px); }
.card-link .t { font-weight: 650; }
.card-link .s { color: var(--muted); font-size: 14px; margin-top: 4px; }
.pill { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--bg2); border: 1px solid var(--line); color: var(--muted); margin-right: 4px; }
.pill.l1 { color: #8fe3b5; } .pill.l2 { color: #f5d06b; } .pill.l3 { color: #ff9b8a; }
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--bg2); color: var(--text);
  padding: 10px 16px; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #1a1405; border-color: var(--accent); }
.btn.small { padding: 6px 10px; font-size: 14px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.spacer { flex: 1; }
.hero { padding: 22px 18px; border-radius: 18px; background: radial-gradient(120% 140% at 0% 0%, #1d5a40 0%, #0f2a1f 60%); border: 1px solid var(--line); }
.hero p { color: #cfe0d6; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.stat { background: rgba(0,0,0,.25); border-radius: 12px; padding: 10px; text-align: center; }
.stat b { display: block; font-size: 22px; color: var(--accent); }
.stat span { font-size: 12px; color: var(--muted); }
.bar { height: 8px; border-radius: 99px; background: var(--bg2); overflow: hidden; }
.bar > i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent2), var(--accent)); }

/* markdown */
.md p { margin: 10px 0; }
.md ul, .md ol { padding-left: 22px; }
.md li { margin: 4px 0; }
.md blockquote { margin: 12px 0; padding: 8px 14px; border-left: 3px solid var(--accent); background: var(--bg2); border-radius: 0 10px 10px 0; color: #d9e6de; }
.md code { background: #06110c; border: 1px solid var(--line); padding: 1px 6px; border-radius: 6px; font-size: .92em; color: #ffd98a; }
.md table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.md th { background: var(--bg2); color: var(--accent); }
.md strong { color: #fff; }

/* playing cards */
.cards { display: inline-flex; gap: 6px; }
.pc { width: 44px; height: 62px; border-radius: 7px; background: #fbfbf7; display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; line-height: 1; box-shadow: 0 2px 6px rgba(0,0,0,.4); }
.pc small { font-size: 18px; }
.pc.h { color: var(--heart); } .pc.d { color: var(--diamond); } .pc.c { color: var(--club); } .pc.s { color: var(--spade); }
.pc.back { background: repeating-linear-gradient(45deg, #7a1f2b 0 6px, #a3303f 6px 12px); border: 3px solid #fbfbf7; }
.pc.ghost { background: rgba(255,255,255,.06); box-shadow: none; border: 1px dashed rgba(255,255,255,.2); }
.pc.mini { width: 30px; height: 42px; font-size: 14px; border-radius: 5px; } .pc.mini small { font-size: 13px; }

/* table */
.table { position: relative; border-radius: 120px; padding: 22px 18px; margin: 12px 0;
  background: radial-gradient(ellipse at center, var(--felt) 0%, var(--felt2) 75%); border: 8px solid #3a2616; box-shadow: inset 0 0 30px rgba(0,0,0,.5); text-align: center; }
.table .pot { display: inline-block; background: rgba(0,0,0,.35); color: var(--accent); padding: 3px 12px; border-radius: 99px; font-weight: 700; margin-bottom: 10px; }
.table .seat { display: flex; justify-content: space-between; align-items: center; font-size: 14px; color: #d4eadd; margin-top: 12px; gap: 8px; flex-wrap: wrap; }
.table .tag { background: rgba(0,0,0,.35); padding: 3px 10px; border-radius: 99px; }
.table .tag b { color: var(--accent); }
.facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin: 10px 0; }
.fact { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.fact > span { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.fact b { font-size: 16px; }

/* quiz */
.opts { display: grid; gap: 8px; margin: 10px 0; }
.opt { text-align: left; border: 1px solid var(--line); background: var(--bg2); color: var(--text); border-radius: 10px; padding: 12px 14px; font: inherit; cursor: pointer; }
.opt:hover:not(:disabled) { border-color: var(--accent); }
.opt.right { border-color: var(--good); background: rgba(62, 207, 142, .12); }
.opt.wrong { border-color: var(--bad); background: rgba(255, 107, 107, .1); }
.opt.alt { border-color: #f5d06b; background: rgba(245, 208, 107, .08); }
.opt:disabled { cursor: default; }
.num { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.num input { width: 130px; font: inherit; font-size: 18px; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: #06110c; color: var(--text); }
.verdict { margin-top: 8px; font-weight: 600; }
.verdict.good { color: var(--good); } .verdict.bad { color: var(--bad); }
.steps { list-style: none; padding: 0; margin: 10px 0; counter-reset: s; }
.steps li { background: var(--bg2); border: 1px solid var(--line); border-left: 3px solid var(--accent2); border-radius: 10px; padding: 10px 14px; margin: 8px 0; animation: pop .25s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(6px); } }
.takeaway { border-left: 3px solid var(--accent); }
.mistake { border-left: 3px solid var(--bad); }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; background: var(--line); vertical-align: middle; }
.dot.done { background: var(--good); } .dot.half { background: #f5d06b; } .dot.miss { background: var(--bad); }
.filters { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.chip { border: 1px solid var(--line); background: var(--bg2); color: var(--muted); padding: 5px 11px; border-radius: 99px; font: inherit; font-size: 13px; cursor: pointer; }
.chip.on { background: var(--accent2); color: #062016; border-color: var(--accent2); font-weight: 600; }
.slist { display: grid; gap: 8px; }
.sitem { display: flex; gap: 10px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; color: var(--text); }
.sitem:hover { border-color: var(--accent); }
.sitem .n { color: var(--muted); font-variant-numeric: tabular-nums; width: 34px; flex: none; }
.sitem .t { flex: 1; }
.formula { font-family: ui-monospace, Menlo, monospace; color: #ffd98a; }
.kbd { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: var(--muted); }
label.f { display: block; font-size: 13px; color: var(--muted); margin: 8px 0 4px; }
input.f, select.f { width: 100%; font: inherit; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: #06110c; color: var(--text); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.big { font-size: 30px; font-weight: 800; color: var(--accent); }
.drillq { font-size: 19px; }
.streak { font-size: 14px; color: var(--muted); }
@media (max-width: 560px) {
  nav { flex-wrap: wrap; } nav a { padding: 4px 8px; font-size: 13px; }
  .top { gap: 4px 12px; padding: 8px 12px; }
  h1 { font-size: 23px; }
  .pc { width: 38px; height: 54px; font-size: 17px; } .pc small { font-size: 15px; }
  .table { border-radius: 60px; padding: 18px 10px; }
  .two { grid-template-columns: 1fr; }
}
.term { border-bottom: 1.5px dotted var(--accent2); cursor: help; }
.term:hover, .term:focus { color: var(--accent2); outline: none; }
.tip { position: fixed; z-index: 50; background: #0a1611; border: 1px solid var(--accent2); border-radius: 12px; padding: 12px 14px; box-shadow: 0 10px 30px rgba(0,0,0,.5); font-size: 14px; line-height: 1.5; }
.tip b { color: var(--accent); } .tip p { margin: 6px 0 8px; color: var(--text); }
.gitem { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
.gitem b { color: var(--accent); } .gitem div { color: #d4e2da; font-size: 15px; margin-top: 2px; }