:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #020617;
  color: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(59, 130, 246, 0.18), transparent 32rem),
    radial-gradient(circle at 85% 80%, rgba(34, 197, 94, 0.14), transparent 28rem),
    #020617;
}

.app {
  width: min(1320px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0;
  display: grid;
  grid-template-columns: minmax(680px, 960px) 320px;
  gap: 20px;
  align-items: start;
}

.game-panel,
.hud {
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(15, 23, 42, 0.78);
  border-radius: 22px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

.game-panel {
  padding: 18px;
}

.title-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 14px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 26px;
  letter-spacing: -0.03em;
}

.title-row p {
  margin-top: 4px;
  color: #94a3b8;
}

.controls-hint {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.controls-hint span,
kbd {
  border: 1px solid rgba(226, 232, 240, 0.18);
  border-bottom-color: rgba(226, 232, 240, 0.32);
  border-radius: 8px;
  padding: 5px 8px;
  background: rgba(2, 6, 23, 0.65);
  color: #f8fafc;
  font: 700 12px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, 0.18);
  background: #020617;
}

.hud {
  padding: 20px;
  position: sticky;
  top: 20px;
}

.hud h2 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #f8fafc;
}

dl {
  display: grid;
  gap: 10px;
  margin: 0;
}

dl > div {
  padding: 12px;
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.14);
}

dt {
  font-size: 12px;
  color: #94a3b8;
  margin-bottom: 5px;
}

dd {
  margin: 0;
  color: #f8fafc;
  font-weight: 800;
  font-size: 15px;
}

.guide {
  margin: 20px 0;
  padding-top: 18px;
  border-top: 1px solid rgba(148, 163, 184, 0.18);
}

.guide p {
  margin: 9px 0;
  color: #cbd5e1;
  font-size: 14px;
}

.log-list {
  margin: 0;
  padding-left: 19px;
  display: grid;
  gap: 7px;
  color: #cbd5e1;
  font-size: 13px;
  line-height: 1.35;
}

.log-list li::marker {
  color: #64748b;
}

@media (max-width: 1120px) {
  .app {
    grid-template-columns: 1fr;
  }

  .hud {
    position: static;
  }
}