.app-shell {
  width: 100%;
  max-width: 480px;
  min-height: 100dvh;
  margin: 0 auto;
  background:
    radial-gradient(circle at 50% -20%, rgba(79,140,255,.25), transparent 34rem),
    var(--color-bg);
  color: var(--color-text);
  position: relative;
}

.app-header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  height: calc(var(--header-height) + env(safe-area-inset-top));
  padding-top: env(safe-area-inset-top);
  background: rgba(7, 11, 26, .82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.app-header-inner {
  height: var(--header-height);
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
}

.app-header-title {
  font-size: var(--text-lg);
  font-weight: 800;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-main {
  min-height: 100dvh;
  padding: calc(var(--header-height) + env(safe-area-inset-top) + var(--space-4)) var(--space-4) calc(var(--bottom-nav-height) + env(safe-area-inset-bottom) + var(--space-4));
  overflow-y: auto;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(10, 15, 30, .9);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-border);
  z-index: 1000;
}

.bottom-nav-inner {
  height: var(--bottom-nav-height);
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  align-items: stretch;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--color-muted);
  font-size: var(--text-xs);
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.bottom-nav-item.is-active {
  color: var(--color-text);
  text-shadow: 0 0 18px rgba(79,140,255,.8);
}

.bottom-nav-icon {
  font-size: 18px;
  line-height: 1;
}

@media (orientation: landscape) and (max-height: 520px) {
  :root {
    --header-height: 52px;
    --bottom-nav-height: 56px;
  }

  .card {
    padding: 12px;
  }

  .calendar-day {
    min-height: 54px;
  }
}

@media (max-width: 360px) {
  :root {
    --text-md: 15px;
    --text-sm: 13px;
  }

  .card {
    padding: 12px;
  }

  .bottom-nav-label {
    font-size: 11px;
  }
}