body.auth,
.shell {
  background-color: var(--color-background);
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.shell-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
}

.shell-header {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: var(--space-12) var(--space-16);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.shell-brand {
  color: var(--color-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.auth-shell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--space-16);
  padding: var(--space-16);
}

.auth-brand {
  color: var(--color-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.auth-card {
  width: 100%;
  max-width: 400px;
}

.shell-content {
  flex: 1;
  padding: var(--space-16);
}

.nav-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  min-height: 44px;
  min-width: 44px;
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-field);
  border: none;
  background: none;
  color: var(--color-text-muted);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  text-decoration: none;
  cursor: pointer;
}

.nav-item:hover {
  background-color: var(--color-accent-soft);
  color: var(--color-text);
}

.nav-item:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.nav-item-active {
  background-color: var(--color-accent-soft);
  color: var(--color-primary);
}

.nav-icon {
  width: 24px;
  height: 24px;
}

.nav-bottom {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  gap: var(--space-8);
  padding: var(--space-8) var(--space-16);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.nav-bottom .nav-item {
  flex: 1;
}

.nav-side {
  display: none;
}

@media (min-width: 1024px) {
  .shell {
    flex-direction: row;
  }

  .shell-body {
    flex: 1;
    padding-bottom: 0;
  }

  .nav-bottom {
    display: none;
  }

  .nav-side {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    width: 200px;
    padding: var(--space-16);
    background-color: var(--color-surface);
    border-right: 1px solid var(--color-border);
  }
}