:root {
  --navy: #1a2332;
  --mint: #7fd4b4;
  --kinari: #f3ead8;
  --persimmon: #c45c2a;
  --yamabuki: #e8a735;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(165deg, var(--navy) 0%, #2a3548 45%, #4a3828 100%);
  color: var(--kinari);
  min-height: 100dvh;
}

.masthead {
  padding: 0.75rem 1rem;
}

.back {
  color: var(--mint);
  text-decoration: none;
  font-size: 0.9rem;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

.start-panel {
  text-align: center;
  padding: 1.5rem 0 2rem;
}

.kicker {
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--yamabuki);
  margin: 0 0 0.5rem;
}

.start-panel h1 {
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  margin: 0 0 0.75rem;
  line-height: 1.25;
}

.start-panel h1 span {
  display: block;
  color: var(--persimmon);
}

.lede {
  margin: 0 0 1.25rem;
  opacity: 0.92;
}

.btn-primary {
  background: var(--mint);
  color: var(--navy);
  border: none;
  border-radius: 999px;
  padding: 0.85rem 1.6rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary:focus-visible {
  outline: 3px solid var(--yamabuki);
  outline-offset: 2px;
}

.live {
  min-height: 1.4em;
  font-size: 0.9rem;
  margin: 0 0 0.5rem;
  text-align: center;
}

.canvas-wrap {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  background: #0f141c;
}

#game-canvas {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
}

.touch {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.65rem;
  margin-top: 0.75rem;
}

.touch button {
  min-height: 52px;
  min-width: 52px;
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 14px;
  border: 2px solid rgba(243, 234, 216, 0.35);
  background: rgba(26, 35, 50, 0.85);
  color: var(--kinari);
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
}

.touch button:active,
.touch button:focus-visible {
  border-color: var(--mint);
  outline: none;
}

.toolbar {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.toolbar button {
  background: transparent;
  border: 1px solid rgba(243, 234, 216, 0.35);
  color: var(--kinari);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
}

.summary-panel {
  text-align: center;
  padding: 1.5rem 0;
}

.summary-panel h2 {
  color: var(--yamabuki);
  margin-bottom: 0.75rem;
}

#summary-stats p {
  margin: 0.25rem 0;
}

.btn-share {
  margin-top: 0.75rem;
  background: #111;
  color: #fff;
  border: 1px solid #444;
  border-radius: 999px;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
}

html[data-capture="1"] .capture-hide {
  display: none !important;
}

@media (min-width: 720px) {
  .app {
    max-width: 1280px;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 1.5rem;
    align-items: start;
  }

  .start-panel,
  .play-panel,
  .summary-panel {
    grid-column: 1;
  }

  .start-panel {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}