.writer-shell {
  max-width: none;
  padding: 0;
  margin: 0;
}
.writer {
  display: grid;
  grid-template-columns: minmax(13rem, 17rem) minmax(0, 1fr);
  min-height: calc(100vh - 3.1rem);
}
.writer-rail {
  border-right: 1px solid var(--line);
  background: var(--bg1);
  padding: 0.85rem 0.75rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 0;
  overflow: auto;
}
.writer-rail h1 {
  margin: 0;
  font-size: 0.95rem;
}
.writer-rail p {
  margin: 0;
  color: var(--mute);
  font-size: 0.72rem;
  line-height: 1.4;
}
.writer-rail .btn-row { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.writer-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.35rem;
}
.writer-row {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.45rem 0.5rem;
  cursor: pointer;
  font: inherit;
}
.writer-row:hover { border-color: var(--line); background: var(--panel); }
.writer-row.active { border-color: var(--select); background: var(--panel); }
.writer-row strong { display: block; font-size: 0.82rem; font-weight: 600; }
.writer-row span { color: var(--mute); font: 0.68rem var(--mono); }
.writer-pane {
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.writer-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg1);
}
.writer-toolbar input.title {
  flex: 1 1 12rem;
  min-width: 8rem;
  background: var(--bg0);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.35rem 0.5rem;
  font: 0.95rem var(--font);
}
.writer-toolbar .meta a { color: var(--text); }
.slug-row {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.35rem 0.8rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg1);
  font: 0.75rem var(--mono);
  color: var(--mute);
}
.slug-row input {
  flex: 1 1 10rem;
  min-width: 6rem;
  background: var(--bg0);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.22rem 0.45rem;
  font: inherit;
}
.writer-actions, .md-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.28rem;
  align-items: center;
}
.md-toolbar {
  padding: 0.4rem 0.8rem;
  border-bottom: 1px solid var(--line);
}
button.btn, a.btn, .writer-rail button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.28rem 0.5rem;
  font: 0.72rem var(--font);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
button.btn.primary {
  border-color: var(--select);
  background: var(--select);
  color: #fff;
}
button.btn.active, .view-toggle button.active {
  border-color: var(--select);
  color: var(--text);
}
button.btn:hover, a.btn:hover { border-color: var(--line-strong); }
.view-toggle { display: flex; gap: 0.2rem; }
.writer-split {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.writer-split.single { grid-template-columns: 1fr; }
.writer-split textarea, .writer-preview {
  min-height: 0;
  height: 100%;
  overflow: auto;
  border: 0;
  border-right: 1px solid var(--line);
}
.writer-split textarea {
  width: 100%;
  resize: none;
  background: var(--bg0);
  color: var(--text);
  padding: 0.9rem 1rem;
  font: 0.82rem/1.5 var(--mono);
}
.writer-preview {
  padding: 1rem 1.2rem 2rem;
  background: var(--bg0);
  border-right: 0;
}
.writer-preview .md-h { margin: 1.1em 0 0.35em; font-weight: 600; }
.writer-preview .md-h1 { font-size: 1.45rem; margin-top: 0; }
.writer-preview .md-h2 { font-size: 1.08rem; }
.writer-preview .md-p { color: var(--dim); margin: 0 0 0.7rem; }
.writer-preview .md-list { color: var(--dim); margin: 0 0 0.85rem; padding-left: 1.2rem; }
.writer-preview .md-quote {
  margin: 0.4em 0 0.85rem;
  padding-left: 10px;
  border-left: 3px solid var(--select);
  color: var(--mute);
}
.writer-preview .md-pre {
  background: var(--bg1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem 0.8rem;
  overflow-x: auto;
  font: 0.78rem var(--mono);
}
.writer-preview .md-blank { height: 0.55rem; }
.writer-preview .md-hr { border: 0; border-top: 1px solid var(--line); margin: 1rem 0; }
.writer-preview .md-math-block { margin: 0.85em 0; overflow-x: auto; }
.writer-preview .katex { color: inherit; font-size: 1.05em; }
.writer-empty {
  padding: 2.5rem 1.4rem;
  color: var(--dim);
  max-width: 46ch;
}
.paper-owner-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin: 0 0 1rem;
}
.paper-owner-bar .meta { margin: 0; }
.paper-inline-editor input.title {
  width: 100%;
  margin-bottom: 0.45rem;
  background: var(--bg0);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.4rem 0.55rem;
  font: 1.05rem var(--font);
}
.paper-inline-editor .slug-row {
  padding: 0 0 0.45rem;
  border-bottom: 0;
  background: transparent;
}
.paper-inline-editor .writer-split {
  min-height: 65vh;
  height: 65vh;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.paper-owner-bar[hidden],
.paper-inline-editor[hidden] {
  display: none !important;
}
@media (max-width: 820px) {
  .writer { grid-template-columns: 1fr; }
  .writer-rail { border-right: 0; border-bottom: 1px solid var(--line); max-height: 38vh; }
  .writer-split { grid-template-columns: 1fr; }
  .writer-split textarea { min-height: 40vh; border-bottom: 1px solid var(--line); }
}
@media print {
  header.top, .writer-rail, .writer-toolbar, .slug-row, .md-toolbar, .writer-split textarea,
  .paper-owner-bar, .paper-inline-editor {
    display: none !important;
  }
  .writer, .writer-split, .writer-pane { display: block; }
  .writer-preview { overflow: visible; color: #111; background: #fff; }
  .writer-preview .md-p, .writer-preview .md-list { color: #222; }
}