/* Общие стили нижней навигации и простых страниц-заглушек. */
.bottom-nav {
  position: fixed;
  z-index: 20;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid #e5e9ee;
  background: rgba(255, 255, 255, .98);
  padding: 8px 12px max(8px, env(safe-area-inset-bottom));
}
.nav-item {
  display: flex;
  min-height: 52px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: #7b8795;
  font-size: 10px;
  font-weight: 550;
  text-decoration: none;
}
.nav-item svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.nav-item.is-current { color: #1677d2; }
.account-options { display: grid; gap: 12px; }
.account-option {
  display: block;
  padding: 18px;
  border: 1px solid #e5e9ee;
  border-radius: 10px;
  background: #fff;
  color: #172334;
  text-decoration: none;
}
.account-option:hover { border-color: #a9cbe9; }
.account-option span { display: block; margin-top: 5px; color: #687586; font-size: 13px; }
.empty-state {
  margin-top: 24px;
  padding: 26px 18px;
  border: 1px solid #e5e9ee;
  border-radius: 10px;
  background: #fff;
  color: #687586;
  text-align: center;
}
@media (min-width: 640px) {
  .bottom-nav {
    right: 50%;
    bottom: 18px;
    left: auto;
    width: min(560px, calc(100vw - 32px));
    transform: translateX(50%);
    border: 1px solid #e5e9ee;
    border-radius: 12px;
    box-shadow: 0 8px 28px #17233412;
    padding: 6px 12px;
  }
}