.submenu{max-height:0;overflow:hidden;transition:max-height .3s ease-in-out}.submenu.open{max-height:500px}@keyframes pulseText{0%,to{opacity:1}50%{opacity:.4}}.pulse{animation:pulseText 1.5s infinite}.measure-instructions{position:fixed;bottom:20px;left:20px;background:rgba(0,0,0,.8);color:#fff;padding:15px;border-radius:8px;max-width:300px;font-size:14px;z-index:30;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);display:none}.measure-instructions.show{display:block}.measure-instructions h4{margin:0 0 10px;font-weight:700;color:#60a5fa}.measure-instructions ul{margin:0;padding-left:20px}.measure-instructions li{margin-bottom:5px}