:root {
  --primary-color: #7c3aed;
  --primary-hover: #6d28d9;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #475569;
  --success-color: #10b981;
  --error-color: #ef4444;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 2rem 0 1rem;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--primary-color), #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.connection-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-radius: 2rem;
  font-size: 0.875rem;
}

.model-selector {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-radius: 2rem;
  font-size: 0.875rem;
}

.model-selector label {
  color: var(--text-secondary);
}

.model-selector select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  cursor: pointer;
  outline: none;
}

.model-selector select:focus {
  border-color: var(--primary-color);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: pulse 2s infinite;
}

.status-indicator.connected {
  background: var(--success-color);
  animation: none;
}

.status-indicator.error {
  background: var(--error-color);
  animation: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin: 1rem 0;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
  gap: 0.75rem;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.message-content {
  max-width: 80%;
  padding: 1rem 1.25rem;
  border-radius: 1rem;
  background: var(--bg-tertiary);
}

.message.user .message-content {
  background: var(--primary-color);
}

.message.assistant .message-content {
  background: var(--bg-tertiary);
}

.message.system .message-content {
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 0.9em;
  border: 1px solid var(--border-color);
  font-family: monospace;
}

/* Tool details (collapsible) */
.message.system details {
  margin-top: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  background: var(--bg-secondary);
}

.message.system summary {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.85rem;
  user-select: none;
  font-weight: bold;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.message.system summary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.message.system details pre {
  margin: 0 !important;
  padding: 0.75rem !important;
  border-radius: 0 !important;
  border: none !important;
  max-height: 300px;
  overflow-y: auto;
  font-size: 0.8em;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Prominent tool output display (not collapsed) */
.message.system .tool-output-display {
  margin-top: 0.75rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--primary-color);
  border-left: 3px solid var(--primary-color);
  border-radius: 0.5rem;
  font-size: 0.75rem;
  line-height: 1.3;
  white-space: pre;
  overflow-x: auto;
  max-height: none;
  /* Use fonts that support box-drawing characters */
  font-family: "Cascadia Code", "Consolas", "DejaVu Sans Mono", "Lucida Console", monospace;
}

.message-content p {
  margin-bottom: 0.5rem;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content ul {
  margin-left: 1.5rem;
  margin-top: 0.5rem;
}

.message-content li {
  margin-bottom: 0.25rem;
}

.message-content pre {
  background: var(--bg-primary);
  padding: 0.75rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 0.5rem 0;
  font-size: 0.875rem;
}

.message-content code {
  font-family: "Courier New", monospace;
}

.loading {
  display: inline-flex;
  gap: 0.25rem;
}

.loading span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: bounce 1.4s infinite ease-in-out both;
}

.loading span:nth-child(1) {
  animation-delay: -0.32s;
}
.loading span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes bounce {
  0%,
  80%,
  100% {
    transform: scale(0);
  }
  40% {
    transform: scale(1);
  }
}

.input-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  position: relative;
}

/* Typing indicator */
.typing-indicator {
  display: none;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--bg-secondary);
  border-radius: 0.5rem;
  border-left: 3px solid var(--primary-color);
  animation: fadeIn 0.3s ease-out;
}

.typing-indicator.visible {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-color);
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
  animation-delay: 0s;
}

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

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

@keyframes typingBounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-8px);
    opacity: 1;
  }
}

.typing-text {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-left: 0.5rem;
}

textarea {
  flex: 1;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
}

textarea:focus {
  border-color: var(--primary-color);
}

textarea::placeholder {
  color: var(--text-secondary);
}

button {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 0.75rem;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
}

button:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

footer a {
  color: var(--primary-color);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Scrollbar styling */
.messages::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

.messages::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.messages::-webkit-scrollbar-thumb:hover {
  background: var(--border-color);
}

/* Streaming cursor */
.streaming-cursor {
  display: inline-block;
  color: var(--primary-color);
  animation: blink 1s step-end infinite;
  font-weight: bold;
  margin-left: 2px;
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* Streaming message style */
.message.streaming .message-content {
  border-left: 2px solid var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .message-content {
    max-width: 90%;
  }

  .container {
    padding: 0.5rem;
  }
}