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

:root {
  --bg: #1e1e1e;
  --surface: #252526;
  --border: #3c3c3c;
  --text: #cccccc;
  --text-dim: #888;
  --accent: #0078d4;
  --accent-hover: #1a8ceb;
  --toolbar-h: 44px;
  --tab-h: 32px;
  --label-h: 26px;
}

html, body { height: 100%; overflow: hidden; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); }

/* Toolbar */
.toolbar {
  height: var(--toolbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  gap: 8px;
}
.toolbar-left, .toolbar-right { display: flex; align-items: center; gap: 8px; }
.logo { font-weight: 700; font-size: 16px; color: var(--accent); text-decoration: none; }
#title-input {
  background: transparent; border: 1px solid transparent; color: var(--text);
  padding: 4px 8px; border-radius: 4px; font-size: 13px; width: 180px;
}
#title-input:hover, #title-input:focus { border-color: var(--border); outline: none; }
#framework-mode {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  padding: 4px 6px; border-radius: 4px; font-size: 12px; cursor: pointer;
}
button {
  background: var(--accent); color: #fff; border: none; padding: 5px 14px;
  border-radius: 4px; font-size: 12px; cursor: pointer; font-weight: 500;
}
button:hover { background: var(--accent-hover); }
.btn-small {
  background: transparent; color: var(--text-dim); padding: 2px 6px; font-size: 11px;
}
.btn-small:hover { color: var(--text); background: var(--border); }

/* Grid layout — 2 columns with dividers: editor | divider | preview+console */
.grid {
  display: grid;
  grid-template-columns: 1fr 4px 1fr;
  grid-template-rows: 1fr 4px 1fr;
  height: calc(100vh - var(--toolbar-h));
}
.panel { position: relative; border: 1px solid var(--border); overflow: hidden; display: flex; flex-direction: column; }
.panel-label {
  height: var(--label-h); line-height: var(--label-h);
  padding: 0 10px; font-size: 11px; font-weight: 600;
  text-transform: uppercase; color: var(--text-dim);
  background: var(--surface); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}

/* Editor panel — full left column */
.panel-editor  { grid-column: 1; grid-row: 1 / 4; display: flex; flex-direction: column; }
.divider-col   { grid-column: 2; grid-row: 1 / 4; cursor: col-resize; background: var(--border); }
.divider-col:hover { background: var(--accent); }
.panel-preview { grid-column: 3; grid-row: 1; }
.divider-row   { grid-column: 3; grid-row: 2; cursor: row-resize; background: var(--border); }
.divider-row:hover { background: var(--accent); }
.panel-console { grid-column: 3; grid-row: 3; }

/* Disable iframe pointer-events while dragging */
body.resizing iframe { pointer-events: none; }

/* Layout variants */
.layout-top-bottom .panel-editor  { grid-column: 1 / 4; grid-row: 1; }
.layout-top-bottom .divider-col   { display: none; }
.layout-top-bottom .panel-preview { grid-column: 1; grid-row: 3; }
.layout-top-bottom .divider-row   { grid-column: 1 / 4; grid-row: 2; cursor: row-resize; }
.layout-top-bottom .panel-console { grid-column: 2 / 4; grid-row: 3; }
.layout-top-bottom {
  grid-template-columns: 1fr 4px 1fr;
  grid-template-rows: 1fr 4px 1fr;
}

.layout-editor-only .panel-editor  { grid-column: 1 / 4; grid-row: 1 / 4; }
.layout-editor-only .divider-col,
.layout-editor-only .divider-row,
.layout-editor-only .panel-preview,
.layout-editor-only .panel-console { display: none; }

.layout-preview-only .panel-preview { grid-column: 1 / 4; grid-row: 1 / 4; }
.layout-preview-only .divider-col,
.layout-preview-only .divider-row,
.layout-preview-only .panel-editor,
.layout-preview-only .panel-console { display: none; }

/* Tab bar */
.tab-bar {
  height: var(--tab-h);
  display: flex;
  align-items: stretch;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 0;
  overflow-x: auto;
}
.tab-btn {
  background: transparent;
  color: var(--text-dim);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0 14px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 0;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tab-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}
.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
  background: rgba(255,255,255,0.06);
}

/* CSS type selector inside tab bar */
.tab-css-type {
  background: var(--bg);
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 10px;
  cursor: pointer;
}

/* Editor area — holds all editor containers, only one visible at a time */
.editor-area { flex: 1; min-height: 0; position: relative; }
.editor-container {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: none;
}
.editor-container.active { display: block; }

#preview-frame { flex: 1; border: none; background: #fff; width: 100%; }

/* Console */
#console-output {
  flex: 1; overflow-y: auto; padding: 6px 10px; font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px; line-height: 1.6; background: var(--bg);
}
.console-line { padding: 1px 0; border-bottom: 1px solid #2a2a2a; white-space: pre-wrap; word-break: break-all; }
.console-log { color: var(--text); }
.console-warn { color: #cca700; }
.console-error { color: #f44747; }
.console-info { color: #3dc9b0; }
.console-debug { color: #888; }

/* Vim status bar */
.vim-status-bar {
  display: none;
  height: 24px;
  line-height: 24px;
  padding: 0 10px;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
  background: var(--surface);
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* Auto-run toggle */
.auto-run-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}
.auto-run-toggle input { cursor: pointer; }

/* Dividers */
.divider { background: var(--border); transition: background 0.15s; z-index: 2; }

/* Layout/keybinding selects — match framework select */
#layout-mode, #keybinding-mode {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  padding: 4px 6px; border-radius: 4px; font-size: 12px; cursor: pointer;
}

/* Listed toggle */
.listed-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}
.listed-toggle input { cursor: pointer; }

/* Tags input */
.tags-input-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  max-width: 280px;
}
#tags-input {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  padding: 3px 6px; border-radius: 4px; font-size: 12px; width: 100px;
}
#tags-input:focus { border-color: var(--accent); outline: none; }
.tags-display { display: flex; gap: 3px; flex-wrap: nowrap; overflow: hidden; }
.tag-pill {
  display: inline-flex; align-items: center; gap: 2px;
  background: var(--border); color: var(--text); padding: 1px 6px;
  border-radius: 10px; font-size: 11px; white-space: nowrap;
}
.tag-pill .tag-remove {
  cursor: pointer; color: var(--text-dim); font-size: 13px; line-height: 1;
  background: none; border: none; padding: 0 0 0 2px;
}
.tag-pill .tag-remove:hover { color: #f44747; }

/* Secondary buttons */
.btn-secondary {
  background: var(--surface); color: var(--text-dim); border: 1px solid var(--border);
}
.btn-secondary:hover { color: var(--text); background: var(--border); }

/* QR Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center; z-index: 1000;
}
.modal-overlay.hidden { display: none; }
.modal-content {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 20px; min-width: 280px; text-align: center;
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; font-size: 14px; font-weight: 600;
}
.modal-header .btn-small { font-size: 18px; padding: 0 4px; }
#qr-canvas { display: flex; justify-content: center; margin-bottom: 12px; }
#qr-canvas img, #qr-canvas canvas { border-radius: 4px; }
.qr-url { font-size: 11px; color: var(--text-dim); word-break: break-all; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; padding: 8px 18px; border-radius: 6px;
  font-size: 13px; z-index: 999; transition: opacity 0.3s;
}
.toast.hidden { opacity: 0; pointer-events: none; }