.install-notice {
  align-items: center;
  background: var(--paper, #ffffff);
  border: 1px solid var(--line, #dbe4f0);
  border-radius: 18px;
  bottom: calc(16px + env(safe-area-inset-bottom));
  box-shadow: 0 14px 40px rgba(15, 23, 42, .18);
  color: var(--text, #172554);
  display: flex;
  gap: 11px;
  left: 50%;
  max-width: min(460px, calc(100vw - 24px));
  padding: 11px 12px;
  position: fixed;
  transform: translateX(-50%);
  width: max-content;
  z-index: 10000;
}

.install-notice img { flex: 0 0 40px; }
.install-notice__content { display: grid; gap: 2px; min-width: 0; }
.install-notice__content strong { font-size: 14px; }
.install-notice__content span { color: var(--sub, #475569); font-size: 12px; line-height: 1.35; }
.install-notice button { font: inherit; }
.install-notice__action {
  background: var(--brand, #1d4ed8);
  border: 0;
  border-radius: 10px;
  color: #fff;
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  min-height: 36px;
  padding: 8px 11px;
}
.install-notice__action:disabled { opacity: .65; }
.install-notice__close {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 8px;
  color: var(--sub, #475569);
  display: grid;
  flex: 0 0 28px;
  font-size: 24px;
  height: 28px;
  line-height: 1;
  padding: 0;
  place-items: center;
  width: 28px;
}
.install-notice__close:focus-visible,
.install-notice__action:focus-visible { outline: 3px solid var(--brand, #1d4ed8); outline-offset: 2px; }

@media (max-width: 420px) {
  .install-notice { align-items: flex-start; gap: 9px; padding: 10px; }
  .install-notice img { height: 34px; width: 34px; }
  .install-notice__action { padding: 8px 9px; }
}