/* ===== MRMarkdown Editor – Dark theme, Remix Icons ===== */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-chat-user: #0d47a1;
  --bg-chat-bot: #1e3a5f;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --success: #3fb950;
  --warning: #d29922;
  --error: #f85149;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 8px 24px rgba(0,0,0,.4);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow: hidden;
}

/* ===== Dashboard ===== */
.dashboard {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 2rem;
  max-width: 900px;
  margin: 0 auto;
}
.dashboard .toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.dashboard header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.dashboard header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.dashboard header .home-emoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  filter: drop-shadow(0 0 12px rgba(88,166,255,0.35));
}
.dashboard header h1 .ri-file-text-2-line { color: var(--accent); }
.doc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.doc-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.doc-list li:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
}
.doc-list li .meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.doc-list li .ri-file-text-line { color: var(--accent); font-size: 1.25rem; }
.doc-list li .title { font-weight: 600; }
.doc-list li .date { font-size: 0.85rem; color: var(--text-secondary); }
.doc-list li .actions {
  display: flex;
  gap: 0.5rem;
}
.doc-list li .actions button {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.doc-list li .actions button:hover { color: var(--error); background: rgba(248,81,73,.15); }
.doc-list li .actions button.ri-delete-bin-line:hover { color: var(--error); }
.doc-list .empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background .15s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Editor layout ===== */
.editor-layout {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
  height: 100vh;
  overflow: hidden;
  min-height: 0;
}
.editor-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  height: 100%;
  overflow: hidden;
}
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.editor-toolbar .back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color .15s, background .15s;
}
.editor-toolbar .back-link:hover { color: var(--accent); background: var(--bg-tertiary); }
.editor-toolbar .doc-title {
  flex: 1;
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.editor-toolbar .doc-title-editable {
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  margin: 0 -0.5rem;
  border-radius: var(--radius-sm);
  transition: background .15s, color .15s;
}
.editor-toolbar .doc-title-editable:hover {
  background: var(--bg-tertiary);
  color: var(--accent);
}
.editor-toolbar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-width: 36px;
  height: 36px;
  padding: 0 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.editor-toolbar button i { font-size: 1rem; }
.editor-toolbar button:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.editor-toolbar button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.editor-toolbar #btn-delete-doc:hover { background: var(--error); border-color: var(--error); }

/* Markdown formatting toolbar */
.md-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 1rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.md-toolbar-group {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding-right: 0.5rem;
  border-right: 1px solid var(--border);
}
.md-toolbar-group:last-child { border-right: none; padding-right: 0; }
.md-toolbar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 32px;
  padding: 0.35rem 0.55rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.md-toolbar button:hover { background: var(--bg-secondary); color: var(--accent); }
.md-toolbar button i { font-size: 1rem; }
.md-toolbar button span {
  font-size: 0.8rem;
  font-weight: 600;
}

.editor-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  overflow: hidden;
}
.editor-area.split {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 10px minmax(220px, 1fr);
  align-items: stretch;
}
#editor, .preview-panel {
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: none;
  resize: none;
  outline: none;
  overflow: auto;
}
.editor-area.split > * { min-height: 0; }
#editor {
  display: block;
  max-height: 100%;
}
.preview-resizer {
  display: none;
  position: relative;
  background: var(--bg-tertiary);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  cursor: col-resize;
}
.editor-area.split .preview-resizer {
  display: block;
}
.preview-resizer::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 48px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(88,166,255,0.2) 0%, rgba(88,166,255,0.85) 50%, rgba(88,166,255,0.2) 100%);
}
.editor-area.dragging {
  cursor: col-resize;
  user-select: none;
}
.editor-area.dragging #editor,
.editor-area.dragging .preview-panel {
  user-select: none;
}
.preview-panel {
  overflow: auto;
  border-left: 1px solid var(--border);
}
.preview-panel h1, .preview-panel h2, .preview-panel h3 { margin-top: 1em; margin-bottom: 0.5em; }
.preview-panel pre { background: var(--bg-tertiary); padding: 1rem; border-radius: var(--radius-sm); overflow: auto; }
.preview-panel code { background: var(--bg-tertiary); padding: 0.2em 0.4em; border-radius: 4px; font-size: 0.9em; }
.preview-panel pre code { background: none; padding: 0; }
.preview-panel blockquote { border-left: 4px solid var(--accent); margin: 0; padding-left: 1rem; color: var(--text-secondary); }
.preview-panel ul, .preview-panel ol { padding-left: 1.5rem; }
.preview-panel a { color: var(--accent); }

/* ===== Chat panel (WhatsApp style) ===== */
.chat-pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.chat-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.chat-header .ri-robot-2-line { font-size: 1.5rem; color: var(--accent); }
.chat-header h2 { margin: 0; font-size: 1rem; font-weight: 600; }
.chat-header .sub { font-size: 0.8rem; color: var(--text-secondary); }
.chat-model-select {
  margin-left: auto;
  min-width: 190px;
  max-width: 220px;
  padding: 0.45rem 0.65rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  outline: none;
}
.chat-model-select:focus { border-color: var(--accent); }
.chat-header .btn-load-ai {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--accent);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.chat-header .btn-load-ai:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.chat-header .btn-load-ai.loaded { background: var(--success); color: #fff; border-color: var(--success); cursor: default; }
.chat-header .btn-reset-chat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.chat-header .btn-reset-chat:hover { background: var(--bg-primary); color: var(--accent); border-color: var(--accent); }
.chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}
.chat-msg {
  max-width: 85%;
  padding: 0.65rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.45;
  position: relative;
  word-wrap: break-word;
}
.chat-msg.user {
  align-self: flex-end;
  background: var(--bg-chat-user);
  color: #fff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,.2);
}
.chat-msg.bot {
  align-self: flex-start;
  background: var(--bg-chat-bot);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.chat-msg .time {
  font-size: 0.7rem;
  opacity: 0.8;
  margin-top: 0.35rem;
  display: block;
}
.chat-msg.bot .time { text-align: right; }
.chat-input-wrap {
  padding: 1rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.chat-input-wrap form {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}
.chat-input-wrap textarea {
  flex: 1;
  min-height: 44px;
  max-height: 120px;
  padding: 0.65rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 22px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  resize: none;
  outline: none;
  transition: border-color .15s;
}
.chat-input-wrap textarea::placeholder { color: var(--text-secondary); }
.chat-input-wrap textarea:focus { border-color: var(--accent); }
.chat-input-wrap button[type="submit"] {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .15s;
}
.chat-input-wrap button[type="submit"] { position: relative; }
.chat-input-wrap button[type="submit"]:hover:not(:disabled) { background: var(--accent-hover); }
.chat-input-wrap button[type="submit"] .chat-send-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: chatSpinner 0.7s linear infinite;
}
.chat-input-wrap button[type="submit"] .chat-send-icon { display: inline-flex; align-items: center; justify-content: center; }
.chat-input-wrap button[type="submit"]:disabled .chat-send-icon { display: none; }
.chat-input-wrap button[type="submit"]:disabled .chat-send-spinner { display: block; }
.chat-input-wrap button[type="submit"]:disabled { cursor: not-allowed; opacity: 0.9; }
@keyframes chatSpinner { to { transform: rotate(360deg); } }
.chat-status {
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}
.chat-status.loading { color: var(--accent); }
.chat-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0 1rem 0.85rem;
  flex-shrink: 0;
}
.chat-action-btn {
  flex: 1;
  min-height: 34px;
  padding: 0.45rem 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-primary);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, opacity .15s;
}
.chat-action-btn:hover:not(:disabled) {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.chat-action-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.chat-msg.typing {
  align-self: flex-start;
  padding: 0.85rem 1.1rem;
  background: var(--bg-chat-bot);
  border: 1px solid var(--border);
  border-radius: 12px;
  border-bottom-left-radius: 4px;
}
.chat-msg.typing .typing-dots span {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-secondary);
  margin: 0 2px;
  animation: typingBounce 0.6s ease-in-out infinite;
}
.chat-msg.typing .typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.chat-msg.typing .typing-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s, visibility .2s;
}
.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 320px;
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform .2s;
}
.modal-overlay.open .modal { transform: scale(1); }
.modal-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { margin: 0; font-size: 1.1rem; }
.modal-header .close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.modal-header .close:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.modal-body { padding: 1.25rem; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}
.modal input[type="text"],
.modal select {
  width: 100%;
  padding: 0.65rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
}
.modal input[type="text"]:focus,
.modal select:focus { border-color: var(--accent); }
.modal input[type="text"]::placeholder { color: var(--text-secondary); }
.modal .modal-textarea {
  width: 100%;
  min-height: 140px;
  padding: 0.8rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font: inherit;
  resize: vertical;
  outline: none;
}
.modal .modal-textarea:focus { border-color: var(--accent); }
.modal .modal-textarea::placeholder { color: var(--text-secondary); }
.ai-create-form {
  display: grid;
  gap: 0.85rem;
}
.modal-help {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.modal-status {
  min-height: 1.25rem;
  color: var(--accent);
  font-size: 0.85rem;
}

/* ===== Toasts ===== */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}
.toast {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text-primary);
  font-size: 0.9rem;
  max-width: 360px;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: toastIn .25s ease;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--error); }
.toast.warning { border-left: 4px solid var(--warning); }
.toast.info { border-left: 4px solid var(--accent); }

/* ===== Utilities ===== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }