:root {
  --background-color: #0d0c1d;
  --container-bg: rgba(22, 21, 45, 0.7);
  --header-bg: rgba(13, 12, 29, 0.8);
  --input-bg: #16152d;
  --user-message-bg: linear-gradient(135deg, #7928CA, #FF0080);
  --agent-message-bg: #2a284e;
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0b0;
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-color: #7928CA;
  --accent-glow: rgba(121, 40, 202, 0.5);
  --error-bg: #4d1c20;
  --error-text: #f8d7da;
  --error-border: #f5c6cb;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-color: var(--background-color);
  color: var(--text-primary);
  overflow: hidden;
}

#background-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* Visually hide elements but keep them accessible to screen readers */
.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;
}

#chat-container {
  width: 100%;
  max-width: 800px;
  height: 90vh;
  max-height: 800px;
  background-color: var(--container-bg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Custom scrollbar for a cohesive look */
#messages::-webkit-scrollbar {
  width: 8px;
}

#messages::-webkit-scrollbar-track {
  background: transparent;
}

#messages::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

#messages::-webkit-scrollbar-thumb:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

#loading-indicator {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  transition: opacity 0.3s ease;
}

#loading-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-color);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

#chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.header-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-group-center {
  flex-grow: 1;
  justify-content: center;
}

#chat-header label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

#model-select,
#voice-select {
  background-color: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.9rem;
  padding: 6px 12px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
  max-width: 150px;
}

#new-chat-button, #clear-chat-button {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
}

#model-select:focus-visible,
#voice-select:focus-visible,
#new-chat-button:focus-visible,
#clear-chat-button:focus-visible {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#model-select:hover:not(:disabled),
#voice-select:hover:not(:disabled) {
  background-color: #3a3a3a;
}
#new-chat-button:hover:not(:disabled), #clear-chat-button:hover:not(:disabled) {
  background-color: var(--input-bg);
  color: var(--text-primary);
}


#new-chat-button:disabled,
#model-select:disabled,
#voice-select:disabled,
#clear-chat-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.toggle-switch-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.voice-select-container {
  display: flex;
  align-items: center;
}

#search-toggle,
#speech-toggle,
#autoscroll-toggle {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  width: 40px;
  height: 22px;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 11px;
  cursor: pointer;
  transition: background-color 0.3s;
}

#search-toggle::before,
#speech-toggle::before,
#autoscroll-toggle::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background-color: var(--text-secondary);
  border-radius: 50%;
  transition: transform 0.3s ease, background-color 0.3s;
}

#search-toggle:checked,
#speech-toggle:checked,
#autoscroll-toggle:checked {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

#search-toggle:checked::before,
#speech-toggle:checked::before,
#autoscroll-toggle:checked::before {
  transform: translateX(18px);
  background-color: white;
}

#search-toggle:focus-visible,
#speech-toggle:focus-visible,
#autoscroll-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#search-toggle:disabled,
#speech-toggle:disabled,
#autoscroll-toggle:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.speech-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px;
  background-color: var(--input-bg);
  border-radius: 18px;
  border: 1px solid var(--border-color);
}

/* Volume Slider Styles */
#volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 70px;
  height: 4px;
  background: #444;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  transition: opacity 0.2s;
  margin: 0 5px 0 10px;
}

#volume-slider:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s, box-shadow 0.2s;
  border: none;
}

#volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s;
}

#volume-slider:hover:not(:disabled)::-webkit-slider-thumb {
  background: var(--text-primary);
}
#volume-slider:hover:not(:disabled)::-moz-range-thumb {
  background: var(--text-primary);
}

#volume-slider:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px var(--accent-glow);
}
#volume-slider:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#play-button,
#pause-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}
#pause-button {
  margin-right: 4px;
}

#play-button:hover:not(:disabled),
#pause-button:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

#play-button:focus-visible,
#pause-button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 1px;
}


#messages {
  flex-grow: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

@keyframes message-in {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message {
  display: flex;
  gap: 12px;
  max-width: 85%;
  animation: message-in 0.4s ease-out;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}
.user-message .avatar {
  background: var(--user-message-bg);
}
.agent-message .avatar {
  background: var(--agent-message-bg);
  border: 1px solid var(--border-color);
}
.avatar svg {
  width: 20px;
  height: 20px;
}


.message-content {
  padding: 12px 18px;
  border-radius: 20px;
  word-wrap: break-word;
  line-height: 1.5;
}

.user-message {
  align-self: flex-end;
  flex-direction: row-reverse;
}
.user-message .message-content {
  background: var(--user-message-bg);
  color: white;
  border-bottom-right-radius: 6px;
}

.agent-message {
  align-self: flex-start;
}
.agent-message .message-content {
  background-color: var(--agent-message-bg);
  color: var(--text-primary);
  border-bottom-left-radius: 6px;
}

/* --- Search Sources Styles --- */
.search-sources-container {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid var(--border-color);
}
.search-sources-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin: 0 0 8px 0;
}
.search-sources-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.search-sources-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.source-number {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: bold;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.source-link {
  color: var(--accent-color);
  text-decoration: none;
  font-size: 0.85rem;
  word-break: break-all;
  border-radius: 2px;
}
.source-link:hover {
  text-decoration: underline;
}
.source-link:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  text-decoration: none;
}

/* --- Markdown Styles --- */
.message-content > *:first-child:not(.search-sources-container) { margin-top: 0; }
.message-content > *:last-child { margin-bottom: 0; }
.message-content p { margin: 0.5em 0; }
.message-content ul, .message-content ol { padding-left: 25px; margin: 0.75em 0; }
.message-content li { margin-bottom: 0.4em; }

/* Wrapper for code blocks to position the copy button */
.code-block-wrapper {
  position: relative;
  margin: 1em 0;
}

.message-content .code-block-wrapper pre {
  margin: 0; /* Wrapper now handles the margin */
  background-color: #100f24;
  border: 1px solid var(--border-color);
  color: #d4d4d4;
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
  font-family: 'SF Mono', 'Consolas', 'Menlo', monospace;
  font-size: 0.9em;
  line-height: 1.5;
}

.message-content .code-block-wrapper pre code {
  background-color: transparent;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.message-content code {
  font-family: 'SF Mono', 'Consolas', 'Menlo', monospace;
  background-color: rgba(0,0,0,0.3);
  border-radius: 4px;
  padding: 2px 5px;
  font-size: 0.9em;
}

/* Copy Button for Code Blocks */
.copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: #3a3a3a;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.8rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.code-block-wrapper:hover .copy-button,
.copy-button:focus-visible {
  opacity: 1;
  transform: translateY(0);
}

.copy-button:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.copy-button:hover:not(:disabled) {
  background-color: #4a4a4a;
  color: var(--text-primary);
}

.copy-button svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}

.copy-button.copied {
  background-color: #28a745;
  border-color: #28a745;
  color: white;
}
/* --- End Markdown Styles --- */

/* --- Speech Highlighting Style --- */
.message-content .speaking-highlight {
  background-color: var(--accent-glow);
  color: #fff;
  border-radius: 3px;
  padding: 1px 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  transition: background-color 0.2s ease;
}


.message-content blockquote {
  border-left: 3px solid var(--accent-color);
  padding-left: 15px;
  margin: 1em 0;
  color: var(--text-secondary);
  font-style: italic;
}
.message-content h1, .message-content h2, .message-content h3 {
  margin-top: 1em; margin-bottom: 0.5em; padding-bottom: 0.2em;
  border-bottom: 1px solid var(--border-color);
}
.message-content a {
  color: var(--accent-color);
  text-decoration: none;
}
.message-content a:hover {
  text-decoration: underline;
}
.message-content a:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: 2px;
}

.message-content.error-message {
  background-color: var(--error-bg);
  color: var(--error-text);
  border: 1px solid var(--error-border);
}

.typing-indicator { display: flex; align-items: center; gap: 5px; padding: 12px 18px; }
.typing-indicator .dot {
  width: 8px; height: 8px; background-color: var(--text-secondary);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}
.typing-indicator .dot:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator .dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}

#chat-form {
  display: flex;
  padding: 15px;
  border-top: 1px solid var(--border-color);
  background-color: var(--header-bg);
  gap: 10px;
  align-items: center;
}

#chat-input {
  flex-grow: 1;
  padding: 12px 18px;
  border: 1px solid var(--border-color);
  background-color: var(--input-bg);
  color: var(--text-primary);
  border-radius: 24px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#chat-input::placeholder {
  color: var(--text-secondary);
}

#chat-input:focus-visible {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

#chat-input:disabled {
  background-color: #333;
  opacity: 0.6;
}

#mic-button, button[type="submit"] {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, transform 0.1s ease, box-shadow 0.2s;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
}

#mic-button:focus-visible, button[type="submit"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#mic-button {
  background: none;
  color: var(--text-secondary);
}

#mic-button:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

#mic-button:active:not(:disabled) {
  transform: scale(0.9);
}

#mic-button.recording {
  background-color: #dc3545;
  color: white;
  box-shadow: 0 0 0 0 rgba(220, 53, 69, 1);
  animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
  0% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(220, 53, 69, 0); }
  100% { box-shadow: 0 0 0 0 rgba(220, 53, 69, 0); }
}

button[type="submit"] {
  background-color: var(--accent-color);
  color: white;
}

button[type="submit"]:hover:not(:disabled) {
  background-color: #8c42d4;
}

button[type="submit"]:active:not(:disabled) {
  transform: scale(0.9);
}

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