:root {
  --color-bg: #ecfeff;
  --color-surface: #ffffff;
  --color-ink: #134e4a;
  --color-accent: #0f766e;
  --color-accent-dark: #115e59;
  --color-border: #99f6e4;
  --color-hit: #bbf7d0;
  --color-miss: #fecaca;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px 16px;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: Georgia, "Times New Roman", serif;
}

.page {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

.hero {
  margin: 0 0 20px;
  padding: 24px;
  background: var(--color-accent);
  color: #ecfeff;
  border-radius: 16px;
  text-align: center;
}

.hero h1,
.hero p {
  margin: 0 0 8px;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
}

.hud p {
  margin: 0;
  font-weight: 700;
}

button {
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: var(--color-accent-dark);
  color: #ecfeff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.status {
  margin: 0 0 16px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-weight: 700;
}

.court {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.spot {
  min-height: 88px;
  padding: 12px;
  border: 2px solid var(--color-accent-dark);
  border-radius: 12px;
  background: #ccfbf1;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.spot:disabled {
  cursor: default;
  opacity: 0.85;
}

.spot.is-hit {
  background: var(--color-hit);
  border-color: #16a34a;
}

.spot.is-miss {
  background: var(--color-miss);
  border-color: #b91c1c;
}

@media (max-width: 560px) {
  .court {
    grid-template-columns: repeat(2, 1fr);
  }
}