frontend/src/components/Message.css

.message {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 6px 0;
  animation: fadeInUp 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.message--user { flex-direction: row-reverse; }

.message__avatar {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.message__avatar--ai {
  background: linear-gradient(135deg, rgba(59,142,255,0.22), rgba(155,109,255,0.18));
  border: 1px solid rgba(59,142,255,0.35);
  font-size: 9px;
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  box-shadow: 0 0 16px rgba(59,142,255,0.22), 0 0 30px rgba(0,229,255,0.1);
}

.message__avatar--user {
  background: linear-gradient(135deg, rgba(155,109,255,0.18), rgba(59,142,255,0.12));
  border: 1px solid rgba(155,109,255,0.25);
  color: var(--accent-violet);
}

.message__content {
  display: flex;
  flex-direction: column;
  gap: 7px;
  max-width: calc(100% - 58px);
  min-width: 0;
}

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

.message__bubble {
  padding: 13px 17px;
  border-radius: 18px;
  font-size: 14.5px;
  line-height: 1.68;
  letter-spacing: -0.01em;
}

.message__bubble--user {
  background: linear-gradient(135deg, var(--accent-blue) 0%, #5B3DFF 100%);
  color: rgba(255,255,255,0.97);
  border-radius: 18px 18px 5px 18px;
  max-width: 530px;
  box-shadow: 0 4px 20px rgba(59,142,255,0.4), 0 0 0 1px rgba(255,255,255,0.1) inset;
}

.message__bubble--user p { margin: 0; }

.message__bubble--ai {
  background: linear-gradient(135deg, rgba(15,18,32,0.95), rgba(10,13,24,0.9));
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  border-radius: 18px 18px 18px 5px;
  position: relative;
  overflow: hidden;
}

.message__bubble--ai::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59,142,255,0.4), rgba(0,229,255,0.6), rgba(155,109,255,0.4), transparent);
}

.message__bubble--error {
  background: rgba(255, 64, 96, 0.08);
  border-color: rgba(255, 64, 96, 0.25);
  color: var(--accent-red);
}

.message__markdown p { margin: 0 0 10px; }
.message__markdown p:last-child { margin-bottom: 0; }
.message__markdown strong { font-weight: 650; color: var(--accent-cyan); }

.message__markdown code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: rgba(59,142,255,0.1);
  border: 1px solid rgba(59,142,255,0.2);
  border-radius: 4px;
  padding: 2px 7px;
  color: var(--accent-cyan);
}

.message__markdown h1, .message__markdown h2, .message__markdown h3 {
  font-weight: 650;
  letter-spacing: -0.025em;
  margin: 14px 0 8px;
}

.message__markdown h1 {
  font-size: 18px;
  background: linear-gradient(90deg, #fff, var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.message__markdown h2 { font-size: 15.5px; color: var(--accent-blue-bright); }
.message__markdown h3 { font-size: 12px; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.08em; }

.message__markdown ul { list-style: none; padding: 0; margin: 8px 0; }
.message__markdown li { display: flex; align-items: baseline; gap: 9px; padding: 3px 0; font-size: 14px; }
.message__markdown li::before {
  content: '◆';
  color: var(--accent-blue);
  font-size: 7px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 4px rgba(59,142,255,0.8));
}

.message__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 5px;
}

.message--user .message__meta { flex-direction: row-reverse; }

.message__time {
  font-size: 10.5px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.message__chunks-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  color: var(--text-tertiary);
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.message__chunks-btn:hover {
  background: var(--accent-cyan-soft);
  border-color: rgba(0,229,255,0.35);
  color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0,229,255,0.12);
}

.message__chunks {
  background: linear-gradient(135deg, rgba(10,13,24,0.98), rgba(6,8,18,0.95));
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeIn 0.22s ease;
  max-width: 560px;
  box-shadow: 0 0 20px rgba(59,142,255,0.06);
}

.message__chunks-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-blue);
  opacity: 0.75;
}

.message__chunk { display: flex; gap: 11px; align-items: flex-start; }

.message__chunk-index {
  width: 19px; height: 19px;
  background: var(--accent-blue-soft);
  border: 1px solid rgba(59,142,255,0.25);
  border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700;
  color: var(--accent-blue);
  font-family: var(--font-mono);
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(59,142,255,0.15);
}

.message__chunk p {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.6;
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
}