:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --code: #ffffff;
  --line: rgba(0, 0, 0, .12);
  --text: #111827;
  --sub: #856259;
  --topbar: #ffffff;
  --primary: #fa9403;
  --muted: #667085;
}

html[data-theme="dark"] {
  --bg: #000;
  --surface: #000;
  --code: #202020;
  --line: rgba(255, 255, 255, .16);
  --text: #e5e7eb;
  --sub: #d9b8a0;
  --topbar: #000;
  --muted: #9ca3af;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: var(--text); background: var(--bg); }

.dt-topbar {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--topbar);
  border-bottom: 1px solid var(--line);
}
.dt-brand { display: flex; align-items: center; gap: 12px; }
.dt-logo { display: block; }
.dt-logotop { width: 500px; max-width: 100%; height: auto; display: block; }
.dt-title { color: var(--sub); font-weight: 700; }
.dt-actions { display: flex; gap: 8px; align-items: center; }

button,
.dt-secondary-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 9px 12px;
  font-weight: 700;
  cursor: pointer;
}
button:hover,
.dt-secondary-btn:hover { border-color: var(--primary); color: var(--primary); }

.dt-main { width: 100%; margin: 18px 0; padding: 0 14px 40px; }

.cm-shell { display: flex; align-items: flex-start; gap: 16px; }
.cm-stage,
.cm-panel { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); padding: 14px; }
.cm-stage { flex: 1 1 auto; min-width: 0; order: 1; }
.cm-panel {
  flex: 0 0 430px;
  width: 430px;
  order: 2;
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow-y: auto;
}

.cm-panel h1,
.cm-panel h2,
.cm-stage h2 { margin: 0 0 10px; color: var(--sub); font-weight: 600; }
.cm-panel h2 { margin-top: 16px; }
.cm-panel-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0 0 12px;
}
.cm-panel-tab {
  font-size: 12px;
  border-radius: 8px;
}
.cm-panel-tab.is-active {
  border-color: var(--primary);
  color: var(--primary);
}
.cm-panel-pane { display: none; }
.cm-panel-pane.is-active { display: block; }

.cm-head p { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.cm-head.out { margin-top: 14px; }

.cm-preview-wrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 380px;
  background: color-mix(in srgb, var(--surface) 94%, #d1d5db);
  padding: 14px;
}
.cm-preview-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.cm-preview-tab {
  font-size: 12px;
  padding: 7px 10px;
}
.cm-preview-tab.is-active {
  border-color: var(--primary);
  color: var(--primary);
}
.cm-preview-frame {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  transition: max-width .2s ease;
}

.cm-preview {
  width: 100%;
  min-height: 340px;
  border-radius: 10px;
  border: 1px dashed var(--line);
  padding: 14px;
  overflow: auto;
}

.cm-row { display: grid; gap: 10px; margin-bottom: 12px; }
.cm-row.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cm-actions { display: grid; gap: 8px; }
.cm-actions.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

label { display: block; font-size: 12px; font-weight: 700; }
input[type="text"],
select,
textarea {
  width: 100%;
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  background: var(--code);
  color: var(--text);
  font-size: 13px;
}
input[type="range"],
input[type="color"] { width: 100%; margin-top: 6px; }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; resize: vertical; }
#archiveSelect { min-height: 170px; }

.cm-mini { display: inline-block; margin-top: 4px; color: var(--muted); font-size: 12px; }
.cm-status { min-height: 22px; margin: 10px 0 0; color: #22c55e; font-weight: 700; }
.cm-help {
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 94%, #f3f4f6);
}
.cm-help h3 { margin: 0 0 8px; font-size: 13px; color: var(--sub); }
.cm-help p { margin: 0 0 7px; font-size: 12px; color: var(--muted); line-height: 1.45; }
.cm-help p:last-child { margin-bottom: 0; }

.cm-docs {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 96%, #f3f4f6);
  overflow: hidden;
}
.cm-docs > summary {
  cursor: pointer;
  list-style: none;
  padding: 10px 12px;
  font-weight: 700;
  color: var(--sub);
}
.cm-docs > summary::-webkit-details-marker { display: none; }
.cm-docs-body {
  border-top: 1px solid var(--line);
  padding: 10px 12px;
}
.cm-docs h3 {
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--sub);
}
.cm-docs p {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.45;
}
.cm-docs ul {
  margin: 0 0 10px 18px;
  padding: 0;
}
.cm-docs li {
  margin: 0 0 5px;
  color: var(--text);
  font-size: 12px;
}
.cm-docs code {
  background: var(--code);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 5px;
}

@media (max-width: 980px) {
  .cm-shell { display: block; }
  .cm-panel {
    width: auto;
    margin-top: 16px;
    position: static;
    top: auto;
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 560px) {
  .cm-preview-tabs { flex-direction: column; }
  .cm-row.two,
  .cm-actions.two { grid-template-columns: 1fr; }
}