.install-overlay {
  position: fixed;
  z-index: 140;
  inset: 0;
  background: var(--overlay-install);
  backdrop-filter: blur(var(--overlay-blur, 3px));
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.install-sheet {
  width: min(760px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: 27px 27px 0 0;
  padding: 0 18px calc(18px + env(safe-area-inset-bottom));
  box-shadow: var(--shadow);
  transform: translateY(var(--drag-y, 0px));
  transition: transform 0.22s ease;
}
.install-sheet.dragging {
  transition: none;
}
.install-sheet-header {
  display: grid;
  grid-template-columns: 1fr 44px;
  align-items: center;
  gap: 12px;
  padding: 4px 0 14px;
}
.install-sheet-header h2 {
  margin: 2px 0 0;
  font-size: 1.16rem;
}
.install-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-2);
}
.install-card img {
  width: 72px;
  height: 72px;
  border-radius: 20px;
}
.install-card strong,
.install-card span {
  display: block;
}
.install-card span {
  margin-top: 5px;
  color: var(--muted);
  line-height: 1.4;
}
.install-instruction {
  margin: 14px 2px;
  padding: 14px;
  border-radius: 16px;
  background: var(--accent-soft);
  color: var(--text);
  line-height: 1.45;
}
.install-actions {
  display: grid;
  gap: 9px;
}
.about-actions {
  display: grid;
  gap: 9px;
  margin-top: 16px;
}