.chat-list-header {
  display: flex;
  justify-content: flex-end;
  padding: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent);
  position: relative;
}

.close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  color: var(--muted);
  font-size: 20px;
  font-weight: bold;
  cursor: pointer;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.close-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  transform: scale(1.1);
}

.chat-list-item.selected {
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.35),
    0 4px 14px rgba(99, 102, 241, 0.18);
}

.chat-list-item.selected .chat-title {
  color: var(--accent);
}

.chat-select-checkbox {
  margin-right: 10px;
  accent-color: var(--accent);
}

.chat-list-item .chat-title-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.chat-list-item.active .chat-title {
  color: var(--accent);
  font-weight: bold;
}

.chat-list-item .chat-meta {
  color: var(--muted);
  font-size: 0.7rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-list-item .chat-controls {
  display: flex;
  gap: 4px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.chat-list-item .chat-delete-btn,
.chat-list-item .chat-copy-btn {
  background: linear-gradient(#ffffff, #f5efdc);
  border: 1px solid rgba(0, 0, 0, 0.55);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  border-radius: 50%;
  font-size: 0.8rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.chat-list-item .chat-delete-btn:hover,
.chat-list-item .chat-copy-btn:hover {
  color: var(--accent-contrast);
  background: linear-gradient(135deg, rgba(76, 52, 255, 0.18), #f4ecd4);
  border-color: rgba(0, 0, 0, 0.75);
  box-shadow: 0 8px 18px var(--shadow);
  transform: translateY(-2px);
}

/* =============================
   Settings panel styling
   ============================= */

.settings-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 20px;
}

.settings-card {
  background: var(--card, #1f2130);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius, 14px);
  padding: 20px;
  box-shadow: var(--shadow-soft, 0 2px 6px rgba(0, 0, 0, 0.3));
  transition: background-color var(--transition, 0.25s ease),
              border-color var(--transition, 0.25s ease),
              box-shadow var(--transition, 0.25s ease);
}

.settings-card header {
  margin-bottom: 16px;
}

.settings-card header h5 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text, #f5f6ff);
}

.settings-card header p {
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--text-muted, rgba(229, 231, 255, 0.7));
}

.settings-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.settings-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted, rgba(229, 231, 255, 0.7));
}

.settings-field input,
.settings-field select,
.settings-field textarea {
  background: var(--panel, #151522);
  color: var(--text, #f5f6ff);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  border-radius: var(--radius, 14px);
  padding: 10px 12px;
  font-size: 0.95rem;
  transition: border-color var(--transition, 0.25s ease),
              box-shadow var(--transition, 0.25s ease);
}

.settings-field input:focus,
.settings-field select:focus,
.settings-field textarea:focus {
  outline: none;
  border-color: var(--accent, #6366f1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}

.settings-field textarea {
  min-height: 120px;
  resize: vertical;
}

.settings-field input[type="range"] {
  padding: 0;
  height: 4px;
  border-radius: 999px;
}

.settings-field input[type="checkbox"] {
  width: auto;
  height: auto;
  accent-color: var(--accent, #6366f1);
}

.settings-card--theme {
  position: relative;
  overflow: hidden;
}

.theme-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.theme-chip {
  padding: 8px 16px;
  border-radius: var(--radius, 14px);
  background: var(--surface-hover, rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
  color: var(--text, #f5f6ff);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.theme-chip:hover {
  transform: translateY(-2px);
  border-color: var(--accent, #6366f1);
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.18);
}

.theme-chip.active {
  background: var(--accent-gradient, linear-gradient(135deg, #4338ca 0%, #4c1d95 100%));
  color: #fff;
  border-color: transparent;
  box-shadow: var(--accent-shadow, 0 0 12px rgba(99, 102, 241, 0.35));
}

.theme-selector__hint {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-muted, rgba(229, 231, 255, 0.7));
}

@media (max-width: 720px) {
  .settings-card {
    padding: 16px;
  }

  .theme-selector {
    gap: 10px;
  }

  .theme-chip {
    flex: 1 1 calc(50% - 10px);
    text-align: center;
  }
}