.install-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 auto 16px;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--bg-panel, rgba(255, 255, 255, 0.92));
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.08);
  max-width: 1100px;
}

.install-banner--bottom {
  position: fixed;
  left: max(16px, env(safe-area-inset-left));
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 60;
  width: min(680px, calc(100% - 32px));
  max-width: calc(100% - 32px);
  margin: 0 auto;
  background: rgba(17, 24, 39, 0.96);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(16px);
}

.install-banner[hidden],
.install-banner.is-hidden {
  display: none;
}

.install-banner__text {
  display: grid;
  gap: 4px;
  line-height: 1.4;
  color: var(--text-primary, #0f172a);
}

.install-banner--bottom .install-banner__text {
  color: #f8fafc;
}

.install-banner__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.install-banner__meta {
  margin: 0;
  color: var(--text-muted, #4b5563);
  font-size: 0.93rem;
}

.install-banner--bottom .install-banner__meta {
  color: #cbd5e1;
}

.install-banner__action {
  margin-left: auto;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--accent, #2563eb);
  background: var(--accent, #2563eb);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
}

.install-banner__dismiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: inherit;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

.install-banner__dismiss:hover {
  background: rgba(255, 255, 255, 0.16);
}

.install-banner__action:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.install-banner__action:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

@media (max-width: 640px) {
  .install-banner--bottom {
    align-items: stretch;
    flex-direction: column;
  }

  .install-banner--bottom .install-banner__action {
    width: 100%;
    margin-left: 0;
  }

  .install-banner--bottom .install-banner__dismiss {
    position: absolute;
    top: 10px;
    right: 10px;
  }

  .install-banner--bottom .install-banner__text {
    padding-right: 2.5rem;
  }
}