.app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ---------- Sidebar ---------- */

.sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 20px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: white;
}

.brand-name {
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.02em;
}

.new-chat-btn {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s;
}

.new-chat-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.empty-history {
  padding: 20px 12px;
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
}

.conversation-item {
  padding: 10px 12px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.15s;
}

.conversation-item:hover {
  background: var(--bg-elevated-2);
}

.conversation-item.active {
  background: var(--accent-soft);
}

.conversation-title {
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.conversation-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-dim);
}

.delete-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 6px;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}

.conversation-item:hover .delete-btn {
  opacity: 1;
}

.delete-btn:hover {
  color: var(--danger);
  background: rgba(239, 90, 111, 0.12);
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 11.5px;
  color: var(--text-dim);
}

/* ---------- Chat panel ---------- */

.chat-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-header {
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
}

.chat-header h1 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-subtitle {
  margin: 0;
  font-size: 12.5px;
  color: var(--text-dim);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.welcome {
  margin: auto;
  text-align: center;
  max-width: 420px;
  color: var(--text-dim);
}

.welcome-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 26px;
  color: white;
}

.welcome h2 {
  color: var(--text);
  font-size: 19px;
  margin: 0 0 8px;
}

.welcome p {
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0;
}

.message-row {
  display: flex;
  flex-direction: column;
  max-width: 72%;
}

.message-row--user {
  align-self: flex-end;
  align-items: flex-end;
}

.bubble {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble--user {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: white;
  border-bottom-right-radius: 4px;
}

.bubble--assistant {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.bubble--typing {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 14px 18px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
  animation: bounce 1.2s infinite ease-in-out;
}

.dot:nth-child(2) {
  animation-delay: 0.15s;
}

.dot:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-4px); opacity: 1; }
}

.retrieval-chip {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(63, 201, 163, 0.08);
  border: 1px solid rgba(63, 201, 163, 0.25);
  font-size: 11.5px;
  max-width: 100%;
}

.retrieval-chip--none {
  background: rgba(139, 144, 160, 0.08);
  border-color: var(--border);
}

.retrieval-chip__icon {
  color: var(--success);
}

.retrieval-chip--none .retrieval-chip__icon {
  color: var(--text-dim);
}

.retrieval-chip__label {
  color: var(--success);
  font-weight: 600;
  text-transform: capitalize;
}

.retrieval-chip--none .retrieval-chip__label {
  color: var(--text-dim);
}

.retrieval-chip__snippet {
  color: var(--text-dim);
  font-style: italic;
  flex-basis: 100%;
}

/* ---------- Composer ---------- */

.composer {
  border-top: 1px solid var(--border);
  padding: 14px 28px 20px;
}

.domain-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.domain-pill {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 12.5px;
  font-weight: 500;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

.domain-pill:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.domain-pill--los { border-left: 3px solid #6d8bff; }
.domain-pill--guidewire { border-left: 3px solid #3fc9a3; }
.domain-pill--duckcreek { border-left: 3px solid #f2b84b; }
.domain-pill--general { border-left: 3px solid #ef5a6f; }

.composer-form {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 10px 10px 16px;
}

.composer-form textarea {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 14px;
  resize: none;
  max-height: 160px;
  padding: 6px 0;
}

.composer-form textarea::placeholder {
  color: var(--text-dim);
}

.composer-form button {
  padding: 9px 18px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: white;
  font-size: 13.5px;
  font-weight: 600;
  transition: opacity 0.15s;
}

.composer-form button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.toast-error {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--danger);
  color: white;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}