/* Navigation Styles */
.card-navigation-container {
  position: relative;
  flex: 1;
  overflow: hidden;
}

.nav-panel {
  position: absolute;
  inset: 0;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
}

.nav-panel[aria-labelledby="panel-b-title"] {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
}

.card-navigation-container[data-active-panel="A"] #panel-A {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.card-navigation-container[data-active-panel="A"] #panel-B {
  transform: translateX(100%);
  opacity: 0;
  pointer-events: none;
}

.card-navigation-container[data-active-panel="B"] #panel-B {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.card-navigation-container[data-active-panel="B"] #panel-A {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
}

.panel-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.panel-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.panel-subtitle {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-right: 6px;
}

/* Navigation Card Grid */
.nav-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  flex: 1;
  overflow-y: auto;
  padding-right: 6px;
}

/* Back Button */
.back-button {
  align-self: flex-start;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.4);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  font-weight: 600;
}

.back-button:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.22);
  box-shadow: 0 10px 24px rgba(99, 102, 241, 0.2);
}

/* Section Styles */
.nav-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.nav-section[hidden] {
  display: none;
}

.section-heading {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
}

.section-heading h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

/* New Chat Button */
.new-chat-btn {
  padding: 10px 16px;
  background: linear-gradient(135deg, var(--accent), #7c84ff);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
  align-self: flex-start;
}

.new-chat-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.new-chat-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Chat List Container */
.chat-list-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 10px 10px;
}

/* Info Panel */
.info-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 20px 0;
}