/* ============================================
   CHAT STYLES
   ============================================ */

.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-primary);
}

/* Welcome State */
.welcome-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  overflow-y: auto;
}

.welcome-content {
  max-width: 600px;
  text-align: center;
  animation: fadeIn 0.5s ease-in-out;
}

.welcome-logo {
  font-size: 4rem;
  margin-bottom: var(--space-xl);
  animation: pulse 2s ease-in-out infinite;
}

.welcome-content h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.welcome-content p {
  font-size: 1.1rem;
  margin-bottom: var(--space-2xl);
}

/* Quick Start */
.quick-start {
  margin-bottom: var(--space-2xl);
  text-align: left;
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  background: var(--bg-secondary);
}

.quick-start h3 {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.quick-start-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.quick-start-btn {
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.quick-start-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Features */
.welcome-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.feature {
  padding: var(--space-lg);
  border-radius: var(--border-radius-lg);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all var(--transition-fast);
}

.feature:hover {
  background: var(--bg-tertiary);
  transform: translateY(-4px);
}

.feature i {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.feature h4 {
  margin-bottom: var(--space-sm);
  font-size: 1rem;
}

.feature p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Messages Area */
.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.message {
  display: flex;
  gap: var(--space-md);
  animation: slideInFromLeft 0.3s ease-out;
  max-width: 85%;
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
  animation: slideInFromRight 0.3s ease-out;
}

.message.ai {
  align-self: flex-start;
}

.message-bubble {
  padding: var(--space-lg);
  border-radius: var(--border-radius-lg);
  line-height: 1.6;
  word-break: break-word;
  white-space: pre-wrap;
}

.message.user .message-bubble {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  border-bottom-right-radius: var(--border-radius-sm);
}

.message.ai .message-bubble {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-bottom-left-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
}

/* Message Content */
.message-content {
  margin-bottom: var(--space-md);
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message-content code {
  background: rgba(0, 0, 0, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
  font-size: 0.9em;
}

.message-content pre {
  background: rgba(0, 0, 0, 0.3);
  padding: var(--space-md);
  border-radius: var(--border-radius-md);
  overflow-x: auto;
  margin: var(--space-md) 0;
}

.message-content pre code {
  padding: 0;
  background: none;
}

/* Message Metadata */
.message-meta {
  font-size: 0.8rem;
  opacity: 0.7;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.message.user .message-meta {
  text-align: right;
  color: rgba(255, 255, 255, 0.8);
}

.message.ai .message-meta {
  color: var(--text-secondary);
}

/* Trace Link */
.trace-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: var(--space-xs);
}

.trace-link:hover {
  background: rgba(102, 126, 234, 0.1);
  color: var(--color-secondary);
}

.message.ai .trace-link {
  color: var(--color-primary);
}

.message.user .trace-link {
  color: rgba(255, 255, 255, 0.9);
}

/* Metadata Items */
.meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.meta-label {
  font-weight: 500;
}

.meta-value {
  opacity: 0.8;
}

.confidence-bar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.confidence-indicator {
  width: 40px;
  height: 4px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 2px;
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  transition: width 0.3s ease-out;
}

/* Input Area */
.input-area {
  padding: var(--space-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-primary);
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  gap: var(--space-md);
  align-items: flex-end;
  margin-bottom: var(--space-sm);
}

.message-input {
  flex: 1;
  resize: none;
  max-height: 200px;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.message-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
  color: var(--text-secondary);
}

.send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.send-btn i {
  width: 1.2rem;
  height: 1.2rem;
}

/* Input Hints */
.input-hints {
  display: flex;
  gap: var(--space-md);
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.message-input:focus ~ .input-hints {
  opacity: 1;
}

.input-hints span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Loading State */
.message-loading {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.loading-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: pulse 1.5s ease-in-out infinite;
}

.loading-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
  animation-delay: 0.4s;
}

/* ============================================
   RESPONSIVE CHAT
   ============================================ */

@media (max-width: 768px) {
  .messages-area {
    padding: var(--space-lg);
  }

  .message {
    max-width: 95%;
  }

  .quick-start-buttons {
    grid-template-columns: 1fr;
  }

  .welcome-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .welcome-content h1 {
    font-size: 1.75rem;
  }

  .welcome-logo {
    font-size: 3rem;
  }

  .message-bubble {
    padding: var(--space-md) var(--space-lg);
  }

  .input-area {
    padding: var(--space-md);
  }

  .input-wrapper {
    gap: var(--space-sm);
  }

  .send-btn {
    width: 36px;
    height: 36px;
  }
}