* { box-sizing: border-box; }

:root {
  --fg: #111;
  --muted: #8a8a8a;
  --line: #e6e6e6;
  font-family: ui-sans-serif, -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  color: var(--fg);
}

body {
  margin: 0;
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
  background: #fff;
}

.panel {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  padding: 20px;
}

h1 { font-size: 16px; font-weight: 600; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 10px; }
.status { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.status.ready { color: #2a8a3a; }
.status.error { color: #c0392b; }

section { padding: 16px 0; border-top: 1px solid var(--line); }
header { margin-bottom: 16px; }

.drop {
  display: grid;
  place-items: center;
  text-align: center;
  height: 110px;
  margin-bottom: 16px;
  border: 1px dashed #bbb;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.drop small { color: var(--muted); }
.drop:hover, .drop.over { background: #f6f6f6; border-color: var(--fg); }

.row {
  display: grid;
  grid-template-columns: 82px 1fr 40px;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.row label { color: #444; }
.row output { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 12px; }
.row select, .row input[type="number"] { grid-column: span 2; }
.row input[type="color"] { width: 40px; height: 24px; padding: 0; border: 1px solid var(--line); background: none; }
.row input[type="checkbox"] { justify-self: start; }
input[type="range"] { width: 100%; accent-color: var(--fg); }
select, input[type="number"] {
  font: inherit;
  padding: 4px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
}

button {
  font: inherit;
  padding: 7px 10px;
  border: 1px solid var(--fg);
  border-radius: 4px;
  background: var(--fg);
  color: #fff;
  cursor: pointer;
}
button:disabled { opacity: 0.35; cursor: default; }
button.ghost { background: none; color: var(--fg); border-color: var(--line); width: 100%; margin-top: 8px; }
.buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 6px; }

main {
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 32px;
  align-content: start;
}

.empty {
  grid-column: 1 / -1;
  max-width: 420px;
  color: var(--muted);
  line-height: 1.5;
}

.card { margin: 0; }
.stage {
  position: relative;
  cursor: grab;
  touch-action: none;
}
.stage:active { cursor: grabbing; }
.stage canvas {
  display: block;
  width: 100%;
  height: auto;
  background:
    repeating-conic-gradient(#f3f3f3 0 25%, #fff 0 50%) 0 0 / 16px 16px;
}
.busy {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(255, 255, 255, 0.8);
  color: var(--muted);
}
.card.loading .busy { display: grid; }
.card.failed .busy { display: grid; color: #c0392b; }

figcaption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}
.name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #444; }
.actions { display: flex; gap: 4px; flex-shrink: 0; }
.actions button { padding: 3px 7px; font-size: 11px; background: none; color: var(--fg); border-color: var(--line); }
.actions button:hover { border-color: var(--fg); }