:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  color: #172026;
  background: #eef2f3;
  --panel: #ffffff;
  --ink-soft: #52606a;
  --line: #d5dde0;
  --accent: #147d75;
  --accent-strong: #0f5c57;
  --warn: #8a5b00;
  --bad: #a93434;
  --good: #217a42;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
button, input, select, textarea { font: inherit; letter-spacing: 0; }
button, .file-button, select, input, textarea {
  border: 1px solid #b9c4ca;
  border-radius: 6px;
  color: #172026;
  background: #fff;
}
button, .file-button { min-height: 34px; padding: 6px 10px; cursor: pointer; }
button:hover, .file-button:hover { border-color: var(--accent); color: var(--accent-strong); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid rgba(20, 125, 117, .25); outline-offset: 1px; }
input, select, textarea { min-height: 34px; padding: 6px 8px; }
textarea { width: 100%; min-height: 96px; resize: vertical; font-family: Consolas, monospace; font-size: 12px; }
.file-button input { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 22px; }
h2 { font-size: 15px; }
h3 { margin: 14px 0 6px; color: var(--ink-soft); font-size: 11px; text-transform: uppercase; }
small, .muted { color: var(--ink-soft); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto auto;
  gap: 16px;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
}
.eyebrow { color: var(--accent-strong); font-size: 11px; font-weight: 700; text-transform: uppercase; }
.toolbar, .button-row, .cloud-controls, .studio-meta, .segmented { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.status-output { color: var(--ink-soft); font-size: 12px; text-align: right; }

.studio-grid {
  display: grid;
  grid-template-columns: minmax(230px, 300px) minmax(420px, 1fr) minmax(320px, 420px);
  grid-template-areas:
    "import import import"
    "explorer editor preview"
    "theme editor preview"
    "theme cloud review";
  gap: 12px;
  padding: 14px;
  align-items: start;
}
.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--panel);
}
.import-panel { grid-area: import; }
.explorer-panel { grid-area: explorer; }
.editor-panel { grid-area: editor; position: sticky; top: 82px; }
.preview-panel { grid-area: preview; }
.theme-panel { grid-area: theme; }
.cloud-panel { grid-area: cloud; }
.review-panel { grid-area: review; }
.panel-heading { display: flex; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.status-pill { border-radius: 999px; padding: 3px 8px; font-size: 11px; font-weight: 700; background: #eef2f4; }
.status-pill.is-valid { color: var(--good); background: #e7f3ec; }
.status-pill.is-invalid { color: var(--bad); background: #f8e8e8; }

.palette-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 5px; }
.palette-grid button { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; }
.tree-list { display: grid; gap: 3px; max-height: 360px; overflow: auto; }
.tree-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  width: 100%;
  padding-left: calc(8px + var(--depth) * 14px);
  text-align: left;
}
.tree-row span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-row.is-selected, .segmented .is-selected { border-color: var(--accent); color: var(--accent-strong); background: #e7f4f2; }

.canvas {
  min-height: 560px;
  overflow: auto;
  border: 1px solid #aebbc0;
  background: var(--color-background);
  padding: var(--space-lg);
}
.canvas-node { position: relative; min-width: 20px; min-height: 18px; }
.canvas-node.is-selected { outline: 2px solid #147d75; outline-offset: 2px; }
.canvas-container, .canvas-stack, .canvas-grid, .canvas-card { display: grid; }
.canvas-stack { grid-template-columns: 1fr; }
.canvas-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.canvas-card strong { display: block; margin-bottom: 4px; }
.canvas-button { justify-self: start; border: 0; }
.canvas-divider { min-height: 1px; }
.canvas-image { display: block; max-width: 100%; object-fit: cover; }

.inspector-form { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.inspector-form label { display: grid; gap: 3px; color: var(--ink-soft); font-size: 11px; }
.style-list { display: grid; gap: 5px; }
.style-row { display: grid; grid-template-columns: minmax(90px, .8fr) minmax(110px, 1fr) minmax(110px, 1fr) 34px; gap: 5px; align-items: center; }
.style-row span { display: grid; font-size: 12px; }
.style-row input, .style-row select { min-width: 0; width: 100%; }
.icon-button { width: 34px; padding: 0; font-size: 18px; }

.theme-token-grid { display: grid; gap: 5px; max-height: 580px; overflow: auto; }
.theme-token-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) 38px minmax(70px, 1fr) minmax(90px, 1fr) 34px;
  gap: 5px;
  align-items: center;
  padding: 6px;
  border-bottom: 1px solid #edf0f1;
}
.theme-token-row > span { display: grid; min-width: 0; }
.theme-token-row strong, .theme-token-row small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.theme-token-row input { min-width: 0; width: 100%; }
.theme-token-row input[type="color"] { padding: 2px; }
.toggle-row { display: flex; gap: 7px; align-items: center; margin-bottom: 8px; font-size: 12px; }
.toggle-row input { min-height: auto; }
.warning { margin: 6px 0; color: var(--warn); font-size: 12px; }

.cloud-controls input { flex: 1 1 160px; }
.version-list, .diff-list { display: grid; gap: 4px; margin: 8px 0 0; padding-left: 18px; font-size: 12px; }
.review-status { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 8px; }

@media (max-width: 1120px) {
  .studio-grid {
    grid-template-columns: minmax(220px, 280px) 1fr;
    grid-template-areas: "import import" "explorer editor" "theme editor" "preview preview" "cloud review";
  }
  .editor-panel { position: static; }
}
@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr; }
  .status-output { text-align: left; }
  .studio-grid { grid-template-columns: 1fr; grid-template-areas: "import" "explorer" "editor" "preview" "theme" "cloud" "review"; padding: 8px; }
  .canvas { min-height: 420px; padding: var(--space-md); }
  .style-row { grid-template-columns: 1fr 1fr 34px; }
  .style-row > span { grid-column: 1 / -1; }
  .theme-token-row { grid-template-columns: minmax(110px, 1fr) 38px 34px; }
  .theme-token-row input[type="range"], .theme-token-row input[type="text"] { grid-column: span 1; }
}