:root {
  /* Purple themed color scheme */
  --background-color: #1e0a3c;
  --text-color: #ffffff;
  --input-background: #2c0f4b;
  --user-message-color: #6c2d8c;
  --assistant-message-color: #442a6f;
  --button-color: #8e44ad;
  --accent-color: #bb86fc;
  --border-radius: 8px;
  --transition-speed: 0.3s;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}
* { box-sizing: border-box; }
body, html {
  font-family: 'Inter', sans-serif;
  margin: 0;
  padding: 0;
  height: 100%;
  background-color: var(--background-color);
  color: var(--text-color);
}
#app { display: flex; flex-direction: column; height: 100%; }
/* Header: Server URL & Model Selection */
#server-url-container {
  padding: 0.75rem;
  background-color: var(--input-background);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
}
#server-url {
  flex-grow: 1;
  padding: 0.5rem 0.75rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--text-color);
  font-size: 0.95rem;
}
    /* Server type selector */
    #server-type-select {
      padding: 0.5rem 0.75rem;
      margin-right: 0.5rem;
      margin-bottom: 0.5rem;
      border: none;
      border-radius: var(--border-radius);
      background-color: var(--input-background);
      color: var(--text-color);
      font-size: 0.95rem;
      cursor: pointer;
      min-width: 120px;
    }
    #custom-url {
      flex-grow: 1;
      padding: 0.5rem 0.75rem;
      margin-right: 0.5rem;
      margin-bottom: 0.5rem;
      border: none;
      border-radius: var(--border-radius);
      background-color: var(--background-color);
      color: var(--text-color);
      font-size: 0.95rem;
      display: none;
    }
    #api-key {
      padding: 0.5rem 0.75rem;
      margin-right: 0.5rem;
      margin-bottom: 0.5rem;
      border: none;
      border-radius: var(--border-radius);
      background-color: var(--background-color);
      color: var(--text-color);
      font-size: 0.95rem;
      display: none;
      min-width: 150px;
    }
    
/* Model selection dropdown */
#model-select {
  padding: 0.5rem;
  font-size: 0.95rem;
  margin-right: 0.5rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--text-color);
}
#connect-button {
  padding: 0.55rem 1rem;
  background-color: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.95rem;
  transition: background-color var(--transition-speed);
}
#connect-button:hover { background-color: var(--accent-color); }
#connection-status {
  width: 100%;
  text-align: center;
  padding: 0.5rem;
  font-size: 0.85rem;
  background-color: var(--input-background);
  color: #ddd;
}
/* Main content: sidebar + chat area */
#main-content {
  display: flex;
  flex-grow: 1;
  overflow: hidden;
}
/* Chat sidebar */
#chat-sidebar {
  width: 250px;
  background-color: var(--input-background);
  border-right: 1px solid #333;
  overflow: hidden;
  transition: width var(--transition-speed) ease;
  position: relative;
  flex-shrink: 0;
}
#chat-sidebar.collapsed { width: 40px; }
/* Toggle sidebar button (right offset) */
#toggle-sidebar {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: var(--button-color);
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  color: var(--text-color);
  cursor: pointer;
  transition: background-color var(--transition-speed);
  z-index: 10;
}
#toggle-sidebar:hover { background-color: var(--accent-color); }
/* Sidebar content */
.sidebar-content {
  padding: 1rem;
  transition: opacity var(--transition-speed) ease;
}
#chat-sidebar.collapsed .sidebar-content {
  opacity: 0;
  pointer-events: none;
}
#chat-sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}
#system-prompt-container {
  margin-bottom: 1rem;
}
#system-prompt-label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
  color: #aaa;
}
#system-prompt-input {
  width: 100%;
  padding: 0.5rem;
  font-size: 0.85rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--text-color);
  resize: vertical;
  min-height: 60px;
  max-height: 120px;
  font-family: inherit;
}
#system-prompt-input:focus {
  outline: 2px solid var(--accent-color);
}
#reset-system-prompt {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  margin-top: 0.25rem;
  background-color: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
  border-radius: var(--border-radius);
  cursor: pointer;
}
#reset-system-prompt:hover {
  background-color: var(--accent-color);
  color: var(--text-color);
}
#new-chat-button {
  width: 100%;
  padding: 0.5rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--button-color);
  color: var(--text-color);
  cursor: pointer;
  margin-bottom: 1rem;
  transition: background-color var(--transition-speed);
  font-size: 0.9rem;
}
#new-chat-button:hover { background-color: var(--accent-color); }
#chat-list { list-style: none; padding: 0; margin: 0; }
/* Chat titles */
#chat-list li {
  padding: 0.75rem;
  border-radius: var(--border-radius);
  margin-bottom: 0.5rem;
  background-color: var(--background-color);
  cursor: pointer;
  transition: background-color var(--transition-speed);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.9rem;
  position: relative;
}
#chat-list li:hover { background-color: var(--input-background); }
#chat-list li.active { background-color: var(--button-color); font-weight: 600; }
/* Custom context menu for deleting chats */
#context-menu {
  display: none;
  position: absolute;
  background-color: var(--button-color);
  color: var(--text-color);
  padding: 0.5rem;
  border-radius: 4px;
  z-index: 1000;
  cursor: pointer;
  font-size: 0.9rem;
}
/* Chat section */
#chat-section {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: linear-gradient(135deg, #2c0f4b, #1e0a3c);
  padding: 1rem;
  border-radius: 10px;
  margin: 1rem;
}
#chat-container {
  flex-grow: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
}
/* Message card styling */
.message {
  max-width: 85%;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  word-wrap: break-word;
  font-size: 0.95rem;
  line-height: 1.5;
  background-color: var(--assistant-message-color);
  box-shadow: var(--shadow);
  animation: fadeIn 0.3s ease;
}
.user-message { align-self: flex-end; background-color: var(--user-message-color); }
.assistant-message { align-self: flex-start; background-color: var(--assistant-message-color); }
.message-header {
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
}
.message-model {
  font-size: 0.75rem;
  color: #ccc;
  margin-bottom: 0.35rem;
}
.message-content { margin-bottom: 0.5rem; }
.message-metrics { font-size: 0.75rem; color: #ccc; text-align: right; }
/* Enhanced Markdown styling */
.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5,
.message-content h6 {
  margin: 0.5rem 0;
  font-weight: 600;
}
.message-content p { margin: 0.5rem 0; line-height: 1.6; }
.message-content code {
  background-color: rgba(27,31,35,0.15);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
}
.message-content pre {
  background-color: #282c34;
  color: #abb2bf;
  padding: 0.8rem;
  overflow-x: auto;
  border-radius: 6px;
  margin: 0.5rem 0;
}
.message-content blockquote {
  border-left: 4px solid var(--button-color);
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  color: #ccc;
  background: rgba(142,68,173,0.1);
}
/* Input container */
#input-container {
  padding: 0.75rem;
  background-color: rgba(44,15,75,0.8);
  border-top: 1px solid #333;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow);
  border-radius: 10px;
}
/* Image upload button */
#upload-button {
  background-color: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: 50%;
  width: 2.75rem;
  height: 2.75rem;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color var(--transition-speed);
}
#upload-button:hover { background-color: var(--accent-color); }
/* Image preview */
#image-preview { display: none; max-width: 50px; }
#user-input {
  flex-grow: 1;
  padding: 0.6rem 0.75rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--text-color);
  font-size: 0.95rem;
}
#user-input::placeholder { color: #bbb; }
#send-button {
  background-color: var(--button-color);
  color: var(--text-color);
  border: none;
  border-radius: 50%;
  width: 2.75rem;
  height: 2.75rem;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color var(--transition-speed);
}
#send-button:hover { background-color: var(--accent-color); }
@media (max-width: 480px) {
  .message { max-width: 90%; }
  #server-url-container { flex-direction: column; align-items: stretch; }
  #server-url, #connect-button, #model-select { width: 100%; margin-right: 0; margin-bottom: 0.5rem; }
  #chat-sidebar { display: none; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
/* Copy code button styles */
.copy-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  background-color: var(--accent-color);
  color: var(--text-color);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 2px 6px;
  opacity: 0.8;
  transition: opacity 0.2s;
}
.copy-btn:hover { opacity: 1; }

/* --- Lightbox pour images générées --- */
.generated-image {
  max-width: 300px;
  max-height: 300px;
  cursor: zoom-in;
  border: 2px solid var(--accent-color);
  border-radius: var(--border-radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: block;
  margin: 0.5rem 0;
}

.generated-image:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(187, 134, 252, 0.3);
}

.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  cursor: zoom-out;
  animation: fadeIn 0.2s ease;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  animation: zoomIn 0.3s ease;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2rem;
  color: var(--accent-color);
  cursor: pointer;
  transition: color 0.2s;
  z-index: 10001;
}

.lightbox-close:hover {
  color: #fff;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes zoomIn {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}