:root {
  --bg: #0f1115;
  --card: #171a21;
  --card2: #1c2029;
  --line: #262b36;
  --text: #e6e9ef;
  --mut: #9aa3b2;
  --dim: #6b7383;
  --accent: #4f8cff;
  --ok: #3ddc84;
  --warn: #ffb547;
  --bad: #ff5d5d;
  --mine: #4f8cff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}
a { color: inherit; }
.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* header */
header .wrap { display: flex; align-items: center; gap: 18px; padding-top: 18px; padding-bottom: 18px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; text-decoration: none; }
.logo .dot { width: 22px; height: 22px; border-radius: 6px; background: linear-gradient(135deg, #4f8cff, #9b5cff); }
.logo small { font-weight: 500; color: var(--mut); font-size: 15px; }
nav { display: flex; gap: 20px; margin-left: 14px; }
nav a { color: var(--mut); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--text); }
.live { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--mut);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px 5px 10px; white-space: nowrap; }
.live i { width: 8px; height: 8px; border-radius: 50%; background: var(--warn); display: inline-block; }
.live.on i { background: var(--ok); box-shadow: 0 0 0 3px rgba(61, 220, 132, .15); }
.live.off i { background: var(--bad); }
header { border-bottom: 1px solid var(--line); }

/* hero */
.hero { padding: 34px 0 18px; }
.hero h1 { margin: 0 0 6px; font-size: 32px; line-height: 1.15; letter-spacing: -.01em; }
.hero p { margin: 0; color: var(--mut); font-size: 17px; max-width: 640px; }

/* stage */
.stage { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 22px; padding: 18px 0 36px; align-items: start; }
.board { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.canvas-box { position: relative; width: 100%; aspect-ratio: 1 / 1; border-radius: 8px; overflow: hidden; background: #14171d; }
.canvas-box canvas { position: absolute; inset: 0; width: 100%; height: 100%; image-rendering: pixelated; }
#wall { touch-action: none; cursor: crosshair; outline: none; }
#over { pointer-events: none; }
#wall:focus-visible { box-shadow: inset 0 0 0 2px var(--accent); }
.banner { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); text-align: center;
  background: rgba(15, 17, 21, .88); border: 1px solid var(--line); border-radius: 12px; padding: 16px 22px;
  min-width: 220px; pointer-events: none; opacity: 0; transition: opacity .25s; }
.banner.show { opacity: 1; }
.banner b { display: block; font-size: 21px; margin-bottom: 2px; }
.banner span { color: var(--mut); font-size: 14px; }
.board-foot { display: flex; justify-content: space-between; gap: 12px; color: var(--dim); font-size: 13px; padding: 10px 2px 0; }
.board-foot kbd { font: 12px/1 ui-monospace, Menlo, Consolas, monospace; border: 1px solid var(--line);
  border-bottom-width: 2px; border-radius: 4px; padding: 2px 5px; color: var(--mut); }

/* side */
.side { display: grid; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.card h2 { margin: 0 0 12px; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.me { display: flex; align-items: center; gap: 12px; }
.me .sw { width: 38px; height: 38px; border-radius: 9px; background: var(--mine); flex: none; }
.me b { display: block; font-size: 18px; line-height: 1.2; }
.me span { color: var(--mut); font-size: 13px; }
.cool { height: 4px; background: var(--card2); border-radius: 4px; margin-top: 14px; overflow: hidden; }
.cool div { height: 100%; width: 100%; background: var(--mine); border-radius: 4px; transform-origin: left; }
.pick { display: flex; gap: 8px; margin-top: 14px; }
.pick button { flex: 1; height: 30px; border-radius: 8px; border: 2px solid transparent; cursor: pointer; padding: 0; }
.pick button[aria-pressed="true"] { border-color: var(--text); }
.pick button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.round { display: flex; align-items: baseline; justify-content: space-between; }
.round b { font: 600 28px/1 ui-monospace, Menlo, Consolas, monospace; letter-spacing: .02em; }
.round span { color: var(--mut); font-size: 14px; }
.rows { display: grid; gap: 10px; }
.row { display: grid; grid-template-columns: 12px 1fr auto; gap: 4px 10px; align-items: center; font-size: 14px; }
.row .c { width: 12px; height: 12px; border-radius: 3px; }
.row .n { display: flex; gap: 8px; align-items: baseline; }
.row .n em { font-style: normal; color: var(--dim); font-size: 12px; }
.row .p { font-variant-numeric: tabular-nums; color: var(--mut); }
.row .bar { grid-column: 2 / 4; height: 6px; background: var(--card2); border-radius: 6px; overflow: hidden; }
.row .bar div { height: 100%; width: 0; border-radius: 6px; transition: width .6s ease; }
.row.lead .n b::after { content: "leading"; margin-left: 8px; font-size: 11px; font-weight: 600; color: var(--bg);
  background: var(--text); border-radius: 4px; padding: 1px 5px; vertical-align: 1px; }
.stat { display: flex; justify-content: space-between; color: var(--mut); font-size: 14px; }
.stat b { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }

/* info */
.how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 8px 0 34px; }
.how .card h3 { margin: 0 0 6px; font-size: 16px; }
.how .card p { margin: 0; color: var(--mut); font-size: 15px; }
.how .card .k { display: inline-block; width: 26px; height: 26px; border-radius: 7px; margin-bottom: 10px; }
.k.t1 { background: #ff7a45; } .k.t2 { background: #2fd6a3; } .k.t4 { background: #c86bff; }
.about { border-top: 1px solid var(--line); padding: 30px 0 36px; display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.about h2 { margin: 0 0 8px; font-size: 20px; }
.about p { margin: 0 0 10px; color: var(--mut); font-size: 15px; }
code { background: #0b0d11; border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; color: #bcd0ff; font-size: 14px; }
footer { border-top: 1px solid var(--line); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 22px; padding-bottom: 26px; color: var(--mut); font-size: 14px; }

@media (max-width: 900px) {
  .stage { grid-template-columns: 1fr; }
  .side { grid-template-columns: 1fr 1fr; }
  .side .card.scores { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  nav { display: none; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 16px; }
  .board { padding: 8px; border-radius: 12px; }
  .board-foot .keys { display: none; }
  .side { grid-template-columns: 1fr; }
  .how { grid-template-columns: 1fr; }
  .about { grid-template-columns: 1fr; gap: 6px; }
}