:root {
  --art-bg: #333;
  --art-fg: #f3f4f6;
  --art-panel-bg: rgba(34, 34, 34, 0.92);
  --art-panel-border: rgba(255, 255, 255, 0.2);
  --art-panel-muted: #ccc;
}

body.art-page {
  background: var(--art-bg);
  color: var(--art-fg);
}

body.art-page .navbar {
  margin-bottom: 0;
}

.art-shell {
  min-height: calc(100vh - 50px);
  padding: 40px;
  display: flex;
  align-items: flex-start;
  gap: 32px;
  box-sizing: border-box;
}

.art-shell--fullscreen {
  min-height: calc(100vh - 50px);
  padding: 0;
}

.art-stage {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.art-chrome {
  flex: 0 0 240px;
  width: 240px;
}

.art-panel {
  border: 1px solid var(--art-panel-border);
  background: var(--art-panel-bg);
  color: var(--art-fg);
  box-sizing: border-box;
}

.art-panel h1,
.art-panel h2,
.art-panel h3,
.art-panel h4,
.art-panel label,
.art-panel p,
.art-panel li {
  color: inherit;
}

.art-panel button,
.art-panel input,
.art-panel select,
.art-panel textarea {
  color: #222;
}

@media (max-width: 767px) {
  .art-shell {
    padding: 16px;
    flex-direction: column;
    gap: 16px;
  }

  .art-chrome {
    width: 100%;
    flex-basis: auto;
  }
}