.install-banner {
  position: fixed;
  z-index: 80;
  left: 50%;
  bottom: calc(78px + env(safe-area-inset-bottom));
  width: min(528px, calc(100% - 24px));
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px solid #cbd9e5;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(10, 23, 36, .22);
}

.install-banner img { border-radius: 12px; }
.install-banner-copy { min-width: 0; display: grid; gap: 3px; }
.install-banner-copy strong { color: #16324f; font-size: 15px; }
.install-banner-copy span { color: #65758b; font-size: 12px; line-height: 1.35; }
.install-banner-action {
  border: 0;
  border-radius: 9px;
  background: #245a83;
  color: #fff;
  padding: 10px 13px;
  font-weight: 800;
  white-space: nowrap;
}
.install-banner-dismiss {
  width: 30px;
  height: 30px;
  border: 0;
  background: transparent;
  color: #738396;
  padding: 0;
  font-size: 25px;
  line-height: 1;
}

.install-guide-dialog {
  width: min(400px, calc(100% - 32px));
  padding: 0;
  border: 0;
  border-radius: 18px;
  color: #17212b;
  box-shadow: 0 22px 60px rgba(10, 23, 36, .3);
}
.install-guide-dialog::backdrop { background: rgba(10, 23, 36, .55); }
.install-guide-content { padding: 24px; text-align: center; }
.install-guide-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin: 0 auto 12px;
  border-radius: 16px;
  background: #16324f;
  color: #fff;
  font-size: 34px;
  font-weight: 800;
}
.install-guide-content h2 { margin: 0 0 18px; color: #16324f; font-size: 20px; }
.install-guide-content ol { margin: 0 0 20px; padding-left: 24px; text-align: left; line-height: 1.75; }
.install-guide-close {
  width: 100%;
  border: 0;
  border-radius: 10px;
  background: #245a83;
  color: #fff;
  padding: 12px;
  font-weight: 800;
}

@media (max-width: 390px) {
  .install-banner { grid-template-columns: 42px minmax(0, 1fr) auto; }
  .install-banner img { width: 42px; height: 42px; }
  .install-banner-dismiss { position: absolute; top: -9px; right: -7px; border-radius: 50%; background: #fff; box-shadow: 0 2px 8px rgba(10, 23, 36, .16); }
  .install-banner-copy span { display: none; }
}

/* Installed-app notice: keep action button inside mobile viewport */
#richhome-install-banner {
  box-sizing: border-box;
  max-width: calc(100vw - 24px);
}

#richhome-install-banner .install-banner-copy {
  min-width: 0;
  flex: 1 1 auto;
}

#richhome-install-banner .install-banner-dismiss {
  flex: 0 0 auto;
  width: auto;
  min-width: 58px;
  white-space: nowrap;
  writing-mode: horizontal-tb;
}

/* Installed notice confirmation button override */
#richhome-install-banner .install-banner-dismiss {
  position: static;
  top: auto;
  right: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  height: 40px;
  padding: 0 14px;
  border-radius: 10px;
  white-space: nowrap;
  writing-mode: horizontal-tb;
}