@import url(https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap);body,button{background:linear-gradient(135deg,#667eea 0,#764ba2 100%)}button,h1,label{font-weight:600}body{font-family:Poppins,sans-serif;min-height:100vh;margin:0;color:#333}.container{padding:2rem;border-radius:15px;box-shadow:0 10px 30px rgba(0,0,0,.2);text-align:center;max-width:521px;width:100%;margin:30px auto}.input-group,h1{margin-bottom:1.5rem}@media screen and (min-width:200px) and (max-width:600px){.container{width:92%}}h1{color:#4a4a4a}.info-item i,label{margin-bottom:.5rem}.input-group{text-align:left}label{display:block;color:#666}input[type=number],select{padding:.75rem;font-size:1rem;border:2px solid #ddd;border-radius:8px;width:100%;box-sizing:border-box;transition:border-color .3s}input[type=number]:focus,select:focus{border-color:#667eea;outline:0}button{color:#fff;border:none;padding:.75rem 1.5rem;font-size:1rem;cursor:pointer;border-radius:8px;transition:transform .3s,box-shadow .3s;width:100%}button:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(0,0,0,.1)}.additional-info,.result{margin-top:1.5rem;font-size:1.1rem;color:#4a4a4a;background-color:rgba(255,255,255,.8);padding:1rem;border-radius:8px;box-shadow:0 5px 15px rgba(0,0,0,.1)}.additional-info{display:flex;flex-wrap:wrap;justify-content:space-around;margin-top:1rem}.info-item{display:flex;flex-direction:column;align-items:center;margin:.5rem}.info-item i{font-size:2rem;color:#667eea}.loading-popup{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.5);justify-content:center;align-items:center;z-index:1000}.popup-content{background-color:#fff;padding:2rem;border-radius:10px;text-align:center;box-shadow:0 0 20px rgba(0,0,0,.2)}.spinner{border:4px solid #f3f3f3;border-top:4px solid #667eea;border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}.loading-popup p{margin:0;font-size:1.2rem;color:#4a4a4a}@media (max-width:480px){.container{padding:1.5rem}h1{font-size:1.5rem}.additional-info,.result{font-size:1rem}}.font-colour h2,.font-colour h3,.font-colour p{color:#fff}