:root {
  /* Colors */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-panel: #21262d;
  --bg-hover: #30363d;
  
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  
  --accent-primary: #00d9ff; /* Cyan */
  --accent-secondary: #7c3aed; /* Purple */
  --accent-warning: #d29922;
  --accent-error: #f85149;
  --accent-success: #2ea043;
  
  --border-color: #30363d;
  
  /* Fonts */
  --font-ui: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout */
  --topbar-height: 50px;
}

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

body {
  font-family: var(--font-ui);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-hover);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Typography */
h1, h2, h3 { font-weight: 600; }
a { color: var(--accent-primary); text-decoration: none; }

/* ─── Topbar ─── */
.topbar {
  height: var(--topbar-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo h1 {
  font-size: 1.2rem;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.status-panel {
  display: flex;
  align-items: center;
  gap: 15px;
}

.badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.badge.provider-primary {
  border-color: rgba(124, 58, 237, 0.4);
  box-shadow: 0 0 10px rgba(124, 58, 237, 0.1);
}

.badge.provider-fallback {
  border-color: rgba(210, 153, 34, 0.4);
  box-shadow: 0 0 10px rgba(210, 153, 34, 0.1);
}

.settings-btn {
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.settings-btn:hover { color: var(--text-primary); }

/* ─── Workspace Layout ─── */
.workspace {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--topbar-height));
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 15px 20px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 1px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.folder-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.2s;
}
.folder-btn:hover {
  background: var(--accent-primary);
  color: #000;
  border-color: var(--accent-primary);
}

.sidebar-actions {
  display: flex;
}

.file-list {
  list-style: none;
  flex: 1;
  overflow-y: auto;
}

.file-item, .folder-item {
  padding: 8px 20px;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s;
}

.file-item:hover, .folder-item:hover {
  background-color: var(--bg-hover);
}

.file-item.active {
  background-color: rgba(0, 217, 255, 0.1);
  color: var(--accent-primary);
  border-left: 3px solid var(--accent-primary);
  padding-left: 17px;
}

.action-btn {
  margin: 15px;
  padding: 8px;
  background: transparent;
  border: 1px dashed var(--border-color);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.action-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* Editor Container */
.editor-container {
  flex: 1;
  position: relative;
  background-color: var(--bg-primary);
  overflow: hidden; /* Let CodeMirror handle its own scroll */
}

/* Chat Panel */
.chat-panel {
  width: 380px;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.chat-header {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-color);
}

.chat-header h2 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.action-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cmd-btn {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}
.cmd-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.chat-history {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.message {
  display: flex;
  gap: 12px;
  animation: fadeIn 0.3s ease;
}

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

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

.message .avatar {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.message.assistant .avatar {
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.2), rgba(124, 58, 237, 0.2));
  border: 1px solid rgba(0, 217, 255, 0.3);
}

.message.user .avatar {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
}

.message .content {
  background-color: var(--bg-panel);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 85%;
  word-wrap: break-word;
}

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

/* Markdown specific styles in chat */
.message .content pre {
  background-color: var(--bg-primary);
  padding: 10px;
  border-radius: 6px;
  margin: 10px 0;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.message .content code {
  font-family: var(--font-mono);
  background-color: var(--bg-primary);
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 0.85em;
}
.message .content pre code {
  background-color: transparent;
  padding: 0;
}

/* Chat Code Block Wrapper for Apply Button */
.code-wrapper {
  position: relative;
  margin: 10px 0;
}
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #161b22;
  padding: 5px 10px;
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  border: 1px solid var(--border-color);
  border-bottom: none;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.code-wrapper pre {
  margin-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.apply-code-btn {
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.2s;
}
.apply-code-btn:hover {
  background: var(--accent-success);
  color: #fff;
}

.message .content p { margin-bottom: 10px; }
.message .content p:last-child { margin-bottom: 0; }

.chat-input-area {
  padding: 15px 20px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.file-context-indicator {
  font-size: 0.75rem;
  color: var(--accent-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 5px;
}

textarea#chat-input {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 12px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  resize: none;
  min-height: 80px;
  max-height: 200px;
  transition: border-color 0.2s;
}

textarea#chat-input:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.input-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}

.primary-btn {
  background: linear-gradient(90deg, #00d9ff, #0099ff);
  color: #000;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.2s;
}

.primary-btn:hover {
  opacity: 0.9;
}
.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ─── Toasts ─── */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}

.toast {
  background-color: var(--bg-panel);
  border-left: 4px solid var(--accent-primary);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  padding: 12px 16px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  max-width: 400px;
  animation: slideIn 0.3s ease forwards;
}

.toast.warning { border-left-color: var(--accent-warning); }
.toast.error { border-left-color: var(--accent-error); }
.toast.success { border-left-color: var(--accent-success); }

.toast-content { flex: 1; }
.toast-title { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.toast-message { font-size: 0.8rem; color: var(--text-secondary); }

.toast-close {
  cursor: pointer;
  color: var(--text-secondary);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

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

/* ─── Modals ─── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  overflow: hidden;
  animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-panel);
}

.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 5px;
}

.close-modal-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
}

.setting-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

.setting-group select {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 4px;
  font-size: 0.9rem;
  outline: none;
}

.setting-group select:focus {
  border-color: var(--accent-primary);
}

/* ─── Editor Tabs ─── */
.editor-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.editor-tab {
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.editor-tab.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.editor-tab:hover:not(.active) {
  color: var(--text-primary);
}