.mikepdf-shell {
  --bg: #121212;
  --bg-soft: #1c1c1c;
  --panel: #1a1a1a;
  --panel-alt: #212121;
  --border: #2a2a2a;
  --text: #e6e6e6;
  --text-dim: #b0b0b0;
  --accent: #4ea1ff;
  --btn-bg: #2b2b2b;
  --btn-bg-hover: #373737;
  --btn-bg-active: #444444;
  --btn-disabled: #3a3a3a;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);

  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 500px;
  background: var(--bg);
  color: var(--text);
  border-radius: 12px;
  overflow: hidden;
}

.mikepdf-toolbar {
  padding: 12px;
  background: linear-gradient(180deg, var(--panel), var(--panel-alt));
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 3;
}

.mikepdf-toolbar-background {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.mikepdf-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  user-select: none;
  line-height: 1.2;
}

.mikepdf-btn:hover {
  background: var(--btn-bg-hover);
}

.mikepdf-btn:active {
  background: var(--btn-bg-active);
  transform: translateY(1px);
}

.mikepdf-btn[disabled] {
  background: var(--btn-disabled);
  color: var(--text-dim);
  cursor: not-allowed;
}

/* Optional neutral style */
.mikepdf-btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--btn-bg);
}

.mikepdf-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
}

.mikepdf-slash {
  color: var(--text-dim);
}

.mikepdf-count {
  min-width: 32px;
  text-align: center;
  font-weight: 600;
}

.mikepdf-zoom-value {
  min-width: 48px;
  text-align: center;
  font-weight: 600;
}

.mikepdf-stage {
  display: grid;
  place-items: center;
  background:
    radial-gradient(1200px 300px at 50% 0%, rgba(78,161,255,0.1), transparent 60%),
    radial-gradient(700px 300px at 80% 20%, rgba(155,140,255,0.08), transparent 50%),
    var(--bg);
  overflow: auto;
  padding: 16px;
}

.mikepdf-stage canvas {
  border: 1px solid var(--border);
  background: #111;
  box-shadow: 0 18px 40px rgba(0,0,0,0.5);
  border-radius: 12px;
  max-width: 95vw;
  height: auto;
  display: block;
}