body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:#f4f7f6;color:#333;margin:0;padding:20px;display:flex;flex-direction:column;align-items:center}h1{color:#2c3e50;font-size:2.5rem;font-weight:300;text-align:center;border-bottom:1px solid #eee;margin-bottom:30px;width:80%;line-height:1.2}.subtitle{display:block;font-size:1rem;font-weight:400;color:#7f8c8d;text-transform:uppercase;letter-spacing:1px;margin-bottom:5px}#gpxSelector,#downloadGpxBtn{padding:10px 15px;border-radius:5px;border:1px solid #ccc;margin:0 5px;font-size:16px;cursor:pointer;background-color:#fff;transition:all .2s ease-in-out}#downloadGpxBtn{background-color:#3498db;color:#fff;border-color:#3498db;margin-left:10px;margin-top:10px}#downloadGpxBtn:disabled{background-color:#bdc3c7;border-color:#bdc3c7;cursor:not-allowed}#downloadGpxBtn:not(:disabled):hover{background-color:#2980b9}#gpxSelector:hover{border-color:#3498db}#map{width:80%;height:500px;margin-top:20px;border-radius:8px;box-shadow:0 4px 8px #0000001a}.chart-container{width:80%;background:#fff;border-radius:8px;box-shadow:0 4px 8px #0000001a}input[type=file]{margin-bottom:20px}.start-marker,.end-marker{filter:drop-shadow(0 2px 2px rgba(0,0,0,.3))}.elevation-marker{background-color:#fff;padding:5px 10px;border-radius:5px;box-shadow:0 2px 4px #0003;font-size:14px;font-weight:700;white-space:nowrap;border:1px solid #777}.elevation-marker-dot{width:12px;height:12px;background-color:#1976d2;border-radius:50%;border:2px solid white;box-shadow:0 0 5px #00000080;transform:translate(-50%,-50%)}