.choice-list{display:grid;gap:10px}.choice{width:100%;min-height:52px;padding:11px 13px;border:3px solid #233a2d;background:#fffaf0;color:#263b35;text-align:left;font-weight:900;cursor:pointer;box-shadow:3px 3px 0 #c6bda6}.choice.selected{background:#e4ebce;outline:3px solid #78ad50;outline-offset:2px}.label-board{position:relative;min-width:600px}.lens-zone{width:24%;min-height:40px}.zone-axis{left:1%;top:52%}.zone-center{left:39%;top:46%}.zone-focus{right:27%;top:52%}.zone-focal-length{left:55%;top:68%}.quiz-visual{user-select:none;-webkit-user-select:none}.quiz-visual svg{min-width:600px}.formula-card{padding:14px;border:3px solid #233a2d;background:#fff0d3;font-size:19px;font-weight:900;line-height:1.6}.number-entry input{max-width:150px}.drag-ghost{position:fixed;z-index:30;pointer-events:none;transform:translate(-50%,-50%);opacity:.9}
@media(max-width:620px){.choice{font-size:14px}.label-board{min-width:600px}}