/* ==========================================================================
   Layout — Containers, Grid, Navigation, Responsive
   ========================================================================== */

/* --- Container --- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-5);
}

.container-narrow {
  max-width: 900px;
}

/* --- Navigation --- */
.site-nav {
  background: var(--neutral-900);
  color: #fff;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  font-size: 14px;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
}

.site-nav-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  padding: 0 var(--space-4);
  height: 100%;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  border-bottom: 2px solid transparent;
}
.site-nav-links a:hover { color: #fff; text-decoration: none; }
.site-nav-links a.active {
  color: #fff;
  border-bottom-color: var(--primary);
  font-weight: var(--font-medium);
}

.site-nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-nav-email {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

.site-nav-logout {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.8);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: var(--font-family);
}
.site-nav-logout:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

/* --- Main Layout (chat + panel) --- */
.main-layout {
  width: 100%;
  max-width: 960px;
  flex: 1;
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  margin: 0 auto;
}

/* --- Section Headers --- */
.person-section { margin-bottom: var(--space-6); }
.person-header {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--neutral-900);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--neutral-300);
}

/* --- Checklist Item (flex layout) --- */
.checklist-item {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-2);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

/* --- Case Meta --- */
.case-meta {
  color: var(--neutral-600);
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-5);
  color: var(--neutral-600);
}

/* --- Download Section --- */
.download-all { margin-bottom: var(--space-5); }

/* --- Responsive --- */
@media (max-width: 700px) {
  .main-layout { flex-direction: column; }
  .doc-panel { width: 100%; max-height: 200px; }
}

@media (max-width: 600px) {
  .site-nav { padding: 0 var(--space-3); }
  .site-nav-links a { padding: 0 10px; font-size: var(--text-sm); }
  .site-nav-email { display: none; }
  .summary-bar { flex-direction: column; }
  .checklist-item { flex-direction: column; }
  .container { padding: var(--space-4); }
  .drop-zone { padding: var(--space-5) var(--space-3); }
  .drop-zone-actions { flex-direction: column; }
  .unassociated-doc { flex-direction: column; align-items: flex-start; }
  .reassign-select { width: 100%; }
}