frontend/src/components/ChatArea.css

.chat-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 15% 20%, rgba(59,142,255,0.09) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 85% 75%, rgba(155,109,255,0.08) 0%, transparent 65%),
    radial-gradient(ellipse 45% 40% at 60% 10%, rgba(0,229,255,0.06) 0%, transparent 60%);
}

.chat-area__inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 100%;
}

.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 24px 40px;
  animation: fadeInUp 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  flex: 1;
}

.welcome__icon {
  position: relative;
  margin-bottom: 32px;
  animation: float 5s ease-in-out infinite;
}

.welcome__icon::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: radial-gradient(circle, rgba(59,142,255,0.2) 0%, rgba(0,229,255,0.1) 40%, transparent 70%);
  border-radius: 50%;
  animation: glowPulse 3s ease-in-out infinite;
}

.welcome__icon svg {
  filter: drop-shadow(0 0 12px rgba(59,142,255,0.8)) drop-shadow(0 0 28px rgba(0,229,255,0.5));
}

.welcome__title {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, #ffffff 10%, #a8d4ff 45%, #00E5FF 75%, #9B6DFF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  line-height: 1;
  animation: textGlow 5s ease-in-out infinite;
}

.welcome__tagline {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 18px;
  opacity: 0.85;
}

.welcome__desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 460px;
  margin-bottom: 40px;
}

.welcome__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  justify-content: center;
  max-width: 620px;
}

.welcome__chip {
  padding: 10px 18px;
  background: var(--bg-glass);
  border: 1px solid var(--border-default);
  border-radius: 100px;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.welcome__chip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59,142,255,0.1) 0%, rgba(0,229,255,0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.welcome__chip:hover::before { opacity: 1; }
.welcome__chip:hover {
  border-color: rgba(0,229,255,0.45);
  color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,229,255,0.15), 0 0 0 1px rgba(0,229,255,0.12);
}

.typing-indicator {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 10px 0;
  animation: fadeIn 0.22s ease;
}

.typing-indicator__avatar {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, rgba(59,142,255,0.2), rgba(155,109,255,0.15));
  border: 1px solid rgba(59,142,255,0.3);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  flex-shrink: 0;
  letter-spacing: 0.04em;
  box-shadow: 0 0 14px rgba(59,142,255,0.2);
}

.typing-indicator__bubble {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: 16px 16px 16px 4px;
  box-shadow: 0 0 20px rgba(59,142,255,0.08);
}

.typing-indicator__dot {
  width: 5px;
  height: 5px;
  background: var(--accent-cyan);
  border-radius: 50%;
  animation: bounceDot 1.3s ease-in-out infinite;
  box-shadow: 0 0 6px rgba(0,229,255,0.6);
}

.typing-indicator__label {
  font-size: 11.5px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  margin-left: 5px;
  letter-spacing: 0.05em;
}