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

body {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---- Split panes ---- */
.split-container {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.split-container.source-only .preview-pane,
.split-container.source-only .splitter {
  display: none;
}

.split-container.preview-only .source-pane,
.split-container.preview-only .splitter {
  display: none;
}

/* ---- Source pane ---- */
.source-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 200px;
  overflow: hidden;
}

.source-pane textarea {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  padding: 8px;
  font-family: Consolas, 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  background: var(--sz-color-window);
  color: var(--sz-color-window-text);
  tab-size: 2;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ---- Splitter ---- */
.splitter {
  width: 4px;
  background: var(--sz-color-button-face);
  border-left: 1px solid var(--sz-color-button-shadow);
  border-right: 1px solid var(--sz-color-button-shadow);
  cursor: col-resize;
  flex-shrink: 0;
}

/* ---- Preview pane ---- */
.preview-pane {
  flex: 1;
  min-width: 200px;
  overflow: auto;
  padding: 12px 16px;
  background: var(--sz-color-window);
  color: var(--sz-color-window-text);
  font-family: Tahoma, Verdana, sans-serif;
  font-size: 12px;
  line-height: 1.5;
}

.preview-pane h1 { font-size: 22px; margin: 16px 0 8px; border-bottom: 1px solid var(--sz-color-button-shadow); padding-bottom: 4px; }
.preview-pane h2 { font-size: 18px; margin: 14px 0 6px; border-bottom: 1px solid var(--sz-color-button-face); padding-bottom: 3px; }
.preview-pane h3 { font-size: 15px; margin: 12px 0 4px; }
.preview-pane h4 { font-size: 13px; margin: 10px 0 4px; }
.preview-pane h5 { font-size: 12px; margin: 8px 0 4px; }
.preview-pane h6 { font-size: 11px; margin: 8px 0 4px; color: var(--sz-color-gray-text); }
.preview-pane p { margin: 6px 0; }
.preview-pane ul, .preview-pane ol { margin: 6px 0; padding-left: 24px; }
.preview-pane li { margin: 2px 0; }
.preview-pane blockquote { border-left: 3px solid var(--sz-color-button-shadow); padding-left: 12px; color: var(--sz-color-gray-text); margin: 6px 0; }
.preview-pane code { background: var(--sz-color-button-face); padding: 1px 4px; font-family: Consolas, monospace; font-size: 12px; border-radius: 2px; }
.preview-pane pre { background: var(--sz-color-button-face); padding: 8px; font-family: Consolas, monospace; font-size: 12px; overflow-x: auto; margin: 6px 0; border-radius: 3px; }
.preview-pane pre code { background: transparent; padding: 0; }
.preview-pane table { border-collapse: collapse; margin: 6px 0; }
.preview-pane th, .preview-pane td { border: 1px solid var(--sz-color-button-shadow); padding: 4px 8px; font-size: 12px; }
.preview-pane th { background: var(--sz-color-button-face); }
.preview-pane hr { border: none; border-top: 1px solid var(--sz-color-button-shadow); margin: 12px 0; }
.preview-pane a { color: var(--sz-color-hot-tracking); }
.preview-pane img { max-width: 100%; }

/* ---- Status bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--sz-color-button-face);
  border-top: 1px solid var(--sz-color-button-shadow);
  font-size: 11px;
  color: var(--sz-color-button-text);
  flex-shrink: 0;
  user-select: none;
  gap: 16px;
}

.status-bar .status-section {
  white-space: nowrap;
}

.status-spacer {
  flex: 1;
}

/* ---- Print styles ---- */
@media print {
  .qat,
  .ribbon-tabs,
  .ribbon-panel,
  .backstage,
  .status-bar,
  .dialog-overlay {
    display: none !important;
  }

  .split-container {
    overflow: visible !important;
  }

  .source-pane {
    display: none !important;
  }

  .splitter {
    display: none !important;
  }

  .preview-pane {
    overflow: visible !important;
  }
}