.admin {
  margin: 0 auto;
  max-width: min(100vw - 28px, 1440px);
  padding: 18px 0 28px;
}
.editor-head {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 14px;
}
.editor-head h1 {
  font: 520 clamp(2rem, 4vw, 3.6rem)/1 var(--font);
  margin: 0;
}
.actions, .pane-bar {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.actions button, .pane-bar button {
  background: var(--text);
  border: 1px solid var(--text);
  border-radius: 4px;
  color: var(--bg);
  cursor: pointer;
  font: 700 12px/1 var(--ui);
  padding: 8px 10px;
}
.actions button:nth-child(-n+3), .pane-bar button {
  background: transparent;
  color: var(--text);
}
.fields {
  border-block: 1px solid var(--line);
  display: grid;
  gap: 10px;
  grid-template-columns: 2fr 1.2fr 150px 1fr;
  padding: 12px 0;
}
.fields label, .github label {
  color: var(--muted);
  display: grid;
  font: 700 11px/1.2 var(--ui);
  gap: 5px;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.fields .summary { grid-column: 1 / -1; }
input, textarea {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--text);
  min-width: 0;
  outline: 0;
}
input {
  font: 15px/1.2 var(--ui);
  padding: 9px 10px;
}
input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.workbench {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: calc(100vh - 260px);
  padding-top: 14px;
}
.pane {
  border: 1px solid var(--line);
  border-radius: 6px;
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 520px;
}
.pane-bar {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font: 700 12px/1 var(--ui);
  justify-content: space-between;
  min-height: 42px;
  padding: 8px 10px;
}
textarea {
  border: 0;
  border-radius: 0;
  font: 16px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  min-height: 100%;
  padding: 18px;
  resize: none;
}
textarea:focus { box-shadow: none; }
.preview-pane {
  background: var(--soft);
}
#preview {
  background: var(--bg);
  margin: 0;
  max-width: none;
  overflow: auto;
  padding: clamp(18px, 4vw, 44px);
}
.github {
  margin-top: 14px;
}
.github summary {
  cursor: pointer;
  font: 700 13px/1.2 var(--ui);
}
.github-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, 1fr);
  margin: 12px 0;
}
.github p, #status {
  color: var(--muted);
  display: block;
  font: 13px/1.4 var(--ui);
}
.github .security-note {
  color: var(--text);
}

@media (max-width: 900px) {
  .editor-head { align-items: flex-start; flex-direction: column; }
  .fields, .workbench, .github-grid { grid-template-columns: 1fr; }
  .pane { min-height: 420px; }
}