:root {
  color-scheme: dark;
  --bg: #111318;
  --ink: #f5f7fb;
  --muted: #aeb7c6;
  --panel: #1b2029;
  --line: rgba(255, 255, 255, 0.13);
  --blue: #58a6ff;
  --red: #ff6b6b;
  --gold: #f2c94c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 0%, rgba(88, 166, 255, 0.14), transparent 34%),
    radial-gradient(circle at 92% 14%, rgba(255, 107, 107, 0.12), transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(1240px, 100vw);
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

h1, h2, p {
  margin: 0;
}

h1 {
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: 0;
}

.topbar p {
  color: var(--muted);
  margin-top: 6px;
}

.scoreboard {
  display: flex;
  gap: 10px;
}

.score {
  min-width: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  background: rgba(255, 255, 255, 0.06);
  text-align: right;
}

.score span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.score strong {
  display: block;
  font-size: 28px;
}

.score-p1 strong {
  color: var(--blue);
}

.score-p2 strong {
  color: var(--red);
}

.game-wrap {
  display: grid;
  grid-template-columns: minmax(0, 960px) 260px;
  gap: 14px;
  align-items: start;
}

canvas {
  width: 100%;
  aspect-ratio: 3 / 2;
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #20242d;
  outline: none;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.38);
}

.panel {
  display: grid;
  gap: 10px;
}

.panel-block {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--panel);
}

.panel-block h2 {
  font-size: 16px;
  margin-bottom: 10px;
}

.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-row:first-of-type {
  border-top: 0;
}

.stat-row span,
.panel-block p,
.panel-block li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.panel-block ul {
  margin: 0;
  padding-left: 18px;
}

kbd {
  display: inline-block;
  min-width: 24px;
  margin: 0 3px 4px 0;
  padding: 2px 6px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom-color: rgba(255, 255, 255, 0.34);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-align: center;
}

@media (max-width: 980px) {
  .topbar {
    align-items: start;
    flex-direction: column;
  }

  .game-wrap {
    grid-template-columns: 1fr;
  }

  .panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .panel {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 28px;
  }
}