.chat-main { padding-bottom: 40px; }

.chat-shell {
  display: flex;
  flex-direction: column;
  height: min(640px, 68vh);
  overflow: hidden;
}

.chat-shell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.msg {
  display: flex;
  gap: 12px;
  max-width: 80%;
}
.msg-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  background: var(--accent);
  color: var(--paper-raised);
}
.msg-user .msg-avatar {
  background: var(--ink);
}

.msg-bubble {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 13px 16px;
  font-size: 0.94rem;
  line-height: 1.55;
}
.msg-bubble p { margin: 0 0 8px; }
.msg-bubble p:last-child { margin-bottom: 0; }

.msg-user .msg-bubble {
  background: var(--ink);
  color: var(--paper-raised);
  border-color: var(--ink);
}

.msg-assistant .msg-bubble { border-top-left-radius: 4px; }
.msg-user .msg-bubble { border-top-right-radius: 4px; }

.msg-bubble.pending {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 15px 16px;
}
.msg-bubble.pending .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.1s ease-in-out infinite;
}
.msg-bubble.pending .pulse:nth-child(2) { animation-delay: 0.15s; }
.msg-bubble.pending .pulse:nth-child(3) { animation-delay: 0.3s; }
@keyframes pulse { 0%, 60%, 100% { opacity: 0.25; transform: scale(0.8); } 30% { opacity: 1; transform: scale(1.05); } }

.msg-bubble.error {
  background: #FBEEEC;
  border-color: #E7C4BE;
  color: var(--danger);
}

.sources {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.source-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--accent-tint);
  color: var(--accent-strong);
  border: 1px solid rgba(60,114,104,0.25);
  border-radius: 999px;
  padding: 3px 10px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.source-chip::before { content: '\2022'; opacity: 0.6; }

.no-answer-note {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--ink-soft);
  border-left: 2px solid var(--amber);
  padding-left: 10px;
}

.composer {
  border-top: 1px solid var(--line);
  padding: 14px 20px 18px;
  background: var(--paper-raised);
}

.suggestions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.suggestion-chip {
  font-size: 0.78rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 13px;
  cursor: pointer;
  color: var(--ink-soft);
  font-family: var(--font-body);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.suggestion-chip:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.composer-form {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

#chatInput {
  flex: 1;
  resize: none;
  font-family: var(--font-body);
  font-size: 0.94rem;
  padding: 12px 14px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  max-height: 140px;
  line-height: 1.4;
}
#chatInput:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

.composer-send { flex-shrink: 0; height: 44px; }

.page-footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--ink-soft);
  padding: 8px 32px 40px;
  max-width: 60ch;
  margin: 0 auto;
}