* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
       background: #f5f5f5; color: #333; height: 100vh; display: flex;
       flex-direction: column; }
header { background: #1a1a2e; color: #eee; padding: 0 24px; height: 48px;
         display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
header h1 { font-size: 16px; font-weight: 600; flex: 1; }
#queue-badge { font-size: 12px; }
#queue-badge a { color: #88aaff; text-decoration: none; }
#queue-badge a:hover { text-decoration: underline; }

#layout { display: flex; flex: 1; overflow: hidden; }
nav { width: 180px; background: #fff; border-right: 1px solid #e0e0e0;
      overflow-y: auto; flex-shrink: 0; padding: 8px 0; }
.view-group { font-size: 10px; font-weight: 700; color: #999;
              letter-spacing: .06em; text-transform: uppercase;
              padding: 8px 12px 2px; }
.view-btn { display: block; padding: 4px 12px; font-size: 11px; color: #333;
            text-decoration: none; border-left: 3px solid transparent;
            cursor: pointer; background: none; border-top: none;
            border-bottom: none; border-right: none; text-align: left;
            width: 100%; white-space: nowrap; overflow: hidden;
            text-overflow: ellipsis; }
.view-btn:hover { background: #f0f0f0; border-left-color: #1a1a2e; }
.view-btn.active { background: #eef2ff; border-left-color: #4c6ef5;
                   color: #4c6ef5; font-weight: 600; }

main { flex: 1; overflow-y: auto; padding: 12px 20px; }
#tab-strip { display: flex; flex-wrap: wrap; gap: 3px; margin-bottom: 8px; }
.tab-btn { padding: 3px 8px; cursor: pointer; border: 1px solid #bbb;
           border-radius: 3px; background: #f4f4f4; font-size: 11px;
           white-space: nowrap; }
.tab-btn.active { background: #333; color: #fff; border-color: #333; }
#expert-header { font-size: 13px; color: #222; margin-bottom: 6px; padding: 4px 0; }
#save-bar { margin: 2px 0 6px; display: none; gap: 6px; }
.save-btn { padding: 3px 10px; cursor: pointer; border: 1px solid #888;
            border-radius: 3px; background: #f8f8f8; font-size: 12px; }
.plot-box { width: 100%; height: 600px; }
#plot-divider { border: none; border-top: 2px solid #d0d0d0; margin: 20px 0; display: none; }

.toast { position: fixed; bottom: 20px; right: 20px; background: #323232;
         color: #fff; padding: 9px 16px; border-radius: 4px; font-size: 13px;
         opacity: 0; transition: opacity 0.3s; pointer-events: none; max-width: 360px; }
.toast.show { opacity: 1; }

#scatter-wrapper { position: relative; isolation: isolate; }
#plot-lock-mask {
  display: none;
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 5;
  cursor: default;
}
#annotation-overlay {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 10;
  transform: translateZ(0);
}
.annotation-label {
  position: absolute;
  pointer-events: all;
  background: #fff;
  border: 2px solid #333;
  box-shadow: 0 2px 8px rgba(0,0,0,.45);
  min-width: 70px;
  user-select: none;
  will-change: transform;
}
.annotation-handle {
  background: #333;
  height: 16px;
  cursor: grab;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 0 3px;
}
.annotation-handle:active { cursor: grabbing; }
.annotation-delete {
  color: #fff;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}
.annotation-delete:hover { color: #f88; }
.annotation-text {
  padding: 5px 9px;
  min-width: 60px;
  min-height: 18px;
  font-size: 14px;
  white-space: nowrap;
  cursor: text;
  user-select: text;
  outline: none;
}