:root {
  --pwa-accent: #c2a384;
  --pwa-accent-deep: #a88462;
  --pwa-text: #3f3027;
  --pwa-surface: rgba(255, 255, 255, 0.96);
  --pwa-border: rgba(194, 163, 132, 0.28);
  --pwa-shadow: 0 14px 34px rgba(76, 51, 30, 0.18);
}

.pwa-install-button {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  background: var(--pwa-accent);
  color: #fff;
  box-shadow: var(--pwa-shadow);
  font: 700 14px/1.2 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
  cursor: pointer;
}

.pwa-install-button:hover,
.pwa-install-button:focus-visible {
  background: var(--pwa-accent-deep);
}

.pwa-install-button[hidden] {
  display: none !important;
}

.pwa-toast {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 10000;
  width: min(calc(100vw - 24px), 520px);
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--pwa-border);
  background: var(--pwa-surface);
  color: var(--pwa-text);
  box-shadow: var(--pwa-shadow);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
}

.pwa-toast[hidden] {
  display: none !important;
}

.pwa-toast__title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
}

.pwa-toast__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.pwa-toast__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pwa-toast__button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  font: 700 13px/1.2 inherit;
  cursor: pointer;
}

.pwa-toast__button--primary {
  background: var(--pwa-accent);
  color: #fff;
}

.pwa-toast__button--secondary {
  background: rgba(63, 48, 39, 0.08);
  color: var(--pwa-text);
}

.pwa-toast__button:hover,
.pwa-toast__button:focus-visible {
  filter: brightness(0.97);
}

@media (max-width: 640px) {
  .pwa-install-button {
    right: 12px;
    bottom: 12px;
    padding: 12px 14px;
    font-size: 13px;
  }

  .pwa-toast {
    bottom: 12px;
    width: min(calc(100vw - 20px), 520px);
    padding: 14px;
  }
}