/* Chat Application Styles */

:root {
  --color-bg: #ffffff;
  --color-surface: #f0f0f0;
  --color-surface-hover: #e5e5e5;
  --color-border: #d0d0d0;
  --color-text: #333333;
  --color-text-muted: #888;
  --color-heading: #333333;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-user-bubble: #3b82f6;
  --color-assistant-bubble: #f5f5f5;
  --color-input-bg: #ffffff;
  --color-input-text: #000000;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

html, body {
  height: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* App Layout */
.chat-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 900px;
  margin: 0 auto;
}

/* Header */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  color: white;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 36px;
}

.org-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.org-logo[hidden] {
  display: none;
}

.chat-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-heading);
}

.chat-title[hidden] {
  display: none;
}

.header-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s, opacity 0.15s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.btn-secondary {
  background-color: var(--color-primary);
  color: white;
  border: none;
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

/* Select */
select {
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  background-color: var(--color-surface-hover);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
}

select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Chat Container */
.chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.messages-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Welcome Message */
.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
  flex: 1;
}

.welcome-message[hidden] {
  display: none;
}

.welcome-message h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-heading);
}

.welcome-message p {
  color: var(--color-text-muted);
}

/* Message Bubbles */
.message {
  display: flex;
  flex-direction: column;
  max-width: 80%;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  align-self: flex-end;
}

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

.message-bubble {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message.user .message-bubble {
  background-color: var(--color-user-bubble);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.message.assistant .message-bubble {
  background-color: var(--color-assistant-bubble);
  color: var(--color-text);
  border-bottom-left-radius: var(--radius-sm);
}

/* Markdown in messages */
.message-bubble p {
  margin-bottom: 0.75rem;
}

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

.message-bubble code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.875em;
  padding: 0.125rem 0.375rem;
  background-color: rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-sm);
}

.message.user .message-bubble code {
  background-color: rgba(255, 255, 255, 0.2);
}

.message-bubble pre {
  margin: 0.75rem 0;
  padding: 1rem;
  background-color: rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.message.user .message-bubble pre {
  background-color: rgba(255, 255, 255, 0.15);
}

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

.message-bubble ul,
.message-bubble ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

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

.message-bubble a {
  color: var(--color-primary);
  text-decoration: underline;
}

.message-bubble blockquote {
  margin: 0.75rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Streaming cursor */
.message-bubble.streaming {
  white-space: pre-wrap;
}

.message-bubble.streaming::after {
  content: '\25CF';
  animation: blink-cursor 0.6s steps(2) infinite;
  margin-left: 2px;
  color: var(--color-text-muted);
}

@keyframes blink-cursor {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* Thinking Indicator */
.thinking-bubble {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.thinking-text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-style: italic;
}

.loading-dots {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.loading-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-text-muted);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}

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

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

@keyframes bounce {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Input Area */
.chat-input-area {
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
}

.message-form {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

.message-form textarea {
  flex: 1;
  resize: none;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  background-color: var(--color-input-bg);
  color: var(--color-input-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 44px;
  max-height: 200px;
  line-height: 1.5;
}

.message-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.message-form textarea::placeholder {
  color: var(--color-text-muted);
}

.message-form .btn-primary {
  padding: 0.75rem;
  min-width: 44px;
  min-height: 44px;
}

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

.chat-container::-webkit-scrollbar-track {
  background: transparent;
}

.chat-container::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

/* Login Page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.login-subtitle {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: left;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
}

.form-group input {
  padding: 0.625rem 0.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  background-color: var(--color-input-bg);
  color: var(--color-input-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.form-group input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.login-btn {
  width: 100%;
  padding: 0.625rem;
  margin-top: 0.5rem;
}

.login-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 640px) {
  .chat-header {
    flex-direction: column;
    gap: 0.75rem;
    align-items: stretch;
  }

  .header-controls {
    justify-content: space-between;
  }

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