#viewport-toolbar { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; flex-direction: column; border: 1px solid #3f3f3f; border-radius: 6px; background: rgba(20, 20, 20, 0.9); z-index: 10; }
#viewport-toolbar button { padding: 6px 12px; border: 1px solid #444; border-radius: 3px; background: #2b2b2b; color: #e9e9e9; font-size: 11px; font-weight: 700; cursor: pointer; }
#viewport-toolbar button:hover { background: #3a3a3a; }
#viewport-toolbar button.active-tool { background: #0a2a2a; border-color: #00ffee; color: #00ffee; box-shadow: 0 0 6px rgba(0,255,238,0.4); }