#app {
  display: grid;
  grid-template-columns: 260px 1fr 320px;
  grid-template-rows: 48px 1fr 28px;
  grid-template-areas:
    "topbar topbar topbar"
    "left   viewport right"
    "status status  status";
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

#left-panel {
  grid-area: left;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
}

#viewport {
  grid-area: viewport;
  position: relative;
  background: var(--bg-0);
  overflow: hidden;
}

#viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#right-panel {
  grid-area: right;
  background: var(--bg-1);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

#status-bar {
  grid-area: status;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 0;
  font-size: 11px;
  color: var(--text-1);
}

#label-container {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.capture-ribbon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--accent-2) 85%, transparent);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  padding: 5px 12px;
  pointer-events: none;
}
.capture-ribbon.hidden { display: none; }