// ── Shell & Navigation ────────────────────────────────────────────────────

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

nav {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  padding: 14px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-base);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { font-size: var(--fs-lg); font-weight: 700; color: var(--text-primary); }

.links {
  display: flex;
  gap: var(--space-xs);

  a {
    color: var(--text-dim);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: color var(--transition), background var(--transition);

    // Active and hover share identical styles — one rule
    &:hover,
    &.active {
      color: var(--text-secondary);
      background: var(--bg-card);
    }
  }
}

// ── Nav auth (sign in / user + sign out) ─────────────────────────────────

.nav-auth {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: auto;
}

.nav-user {
  font-size: var(--fs-sm);
  color: var(--text-dim);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-sm {
  padding: 4px 10px;
  font-size: var(--fs-sm);
}

main { flex: 1; padding: 28px 32px; }

// ── Navigation progress bar ───────────────────────────────────────────────

.nav-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 100;
  background: var(--bg-card);
  overflow: hidden;

  .nav-bar {
    height: 100%;
    background: var(--blue);
    animation: nav-progress 1.5s ease-in-out infinite;
    transform-origin: left;
  }
}

@keyframes nav-progress {
  0%   { transform: translateX(-100%) scaleX(0.3); }
  50%  { transform: translateX(0%)    scaleX(0.7); }
  100% { transform: translateX(100%)  scaleX(0.3); }
}

// ── Page-load overlay ─────────────────────────────────────────────────────

.nav-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 100px 0;
  flex: 1;
}


// ── Shared loading area ───────────────────────────────────────────────────

.loading-area {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 80px 0;
}