:root {
  color-scheme: light;
  --paper: #f4efdf;
  --ink: #172527;
  --panel: #fff9ea;
  --line: #d9cfaa;
  --teal: #26b6c7;
  --teal-dark: #0e6a76;
  --amber: #e9a93f;
  --amber-dark: #8f5b11;
  --coral: #db5d55;
  --moss: #244d43;
  --shadow: rgba(30, 36, 31, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 12%, rgba(38, 182, 199, 0.18), transparent 26rem),
    radial-gradient(circle at 84% 8%, rgba(233, 169, 63, 0.20), transparent 24rem),
    linear-gradient(135deg, #f4efdf 0%, #e6f0e4 48%, #f7e5d5 100%);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  padding: 0 16px;
  color: #fbf6e8;
  background: #172527;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(23, 37, 39, 0.18);
}

button:hover:not(:disabled),
button:focus-visible {
  background: #27484b;
}

button:focus-visible,
canvas:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

button:disabled {
  cursor: default;
  color: #5f696b;
  background: #cbd6d2;
  box-shadow: none;
}

.game-shell {
  width: min(1180px, calc(100vw - 24px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px 0 24px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
}

.hud {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  gap: 16px;
  align-items: stretch;
  padding: 16px;
  border: 1px solid rgba(23, 37, 39, 0.14);
  border-radius: 8px;
  background: rgba(255, 249, 234, 0.88);
  box-shadow: 0 18px 50px var(--shadow);
}

.briefing {
  display: grid;
  align-content: center;
  gap: 5px;
  min-width: 0;
}

.eyebrow {
  margin: 0;
  color: var(--teal-dark);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(1.18rem, 1rem + 0.8vw, 1.72rem);
  line-height: 1.14;
  letter-spacing: 0;
}

.briefing p:last-child {
  max-width: 760px;
  margin: 0;
  color: #405152;
  line-height: 1.4;
}

.meters {
  display: grid;
  grid-template-columns: repeat(5, minmax(72px, 1fr));
  gap: 8px;
  align-items: stretch;
}

.meters span {
  min-width: 72px;
  padding: 9px 10px;
  border: 1px solid rgba(23, 37, 39, 0.12);
  border-radius: 8px;
  background: #fffdf5;
  text-align: center;
}

.meters b,
.meters small {
  display: block;
}

.meters b {
  font-size: 1.06rem;
  line-height: 1.15;
}

.meters small {
  margin-top: 2px;
  color: #5d6a68;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.meters button {
  grid-column: span 1;
}

.arena-panel {
  display: grid;
  gap: 9px;
  align-content: start;
}

canvas {
  width: 100%;
  aspect-ratio: 48 / 31;
  display: block;
  border: 1px solid rgba(23, 37, 39, 0.18);
  border-radius: 8px;
  background: #1a393b;
  box-shadow: 0 22px 58px var(--shadow);
  touch-action: none;
}

.controls-note {
  margin: 0;
  padding: 0 4px;
  color: #435254;
  font-size: 0.88rem;
  line-height: 1.35;
}

@media (max-width: 900px) {
  .hud {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 560px) {
  .game-shell {
    width: min(100vw - 14px, 1180px);
    padding-top: 8px;
  }

  .hud {
    padding: 12px;
  }

  .meters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .meters span {
    min-width: 0;
  }
}