*{box-sizing:border-box}body{margin:0;background:#f2f5f8;color:#182b3d;font-family:Calibri,system-ui,sans-serif;font-size:18px;line-height:1.5}main{max-width:860px;margin:24px auto;padding:0 20px 50px}h1{font-size:32px;line-height:1.2}h2{font-size:24px}small{display:block;font-size:.78em;color:#53677a;font-weight:400}.eyebrow{letter-spacing:.12em;color:#496681;font-size:14px}section,.card{background:white;border:1px solid #dce4ec;border-radius:16px;padding:24px}section section{border:0;padding:0}button{font:inherit;border:0;background:#174f77;color:white;padding:12px 22px;border-radius:9px;cursor:pointer;margin-top:12px}button:disabled{background:#8898a7;cursor:default}input,select{font:inherit;padding:10px;max-width:100%}input[type=checkbox]{width:22px;height:22px;vertical-align:middle}label{display:block;margin:12px 0}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.urns,.balls{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0}.urn{display:inline-flex;width:35px;height:40px;border:2px solid #698297;border-radius:5px 5px 13px 13px;align-items:center;justify-content:center;font-weight:bold}.urn.a{background:#dceaf5}.ball{display:inline-flex;width:28px;height:28px;border-radius:50%;align-items:center;justify-content:center;font-size:12px;font-weight:bold;color:white}.red{background:#be3d4b}.blue{background:#2765a4}.evidence{margin:20px 0;background:#eef4fa;padding:18px;border-radius:12px}.scale-wrap{position:relative;height:48px;margin:10px 0}input[type=range]{width:100%;padding:0;accent-color:#174f77;cursor:pointer}input[type=range].untouched::-webkit-slider-thumb{opacity:0}input[type=range].untouched::-moz-range-thumb{opacity:0}.ticks{display:flex;justify-content:space-between;font-size:14px;color:#53677a;gap:5px}.ticks span{width:20%;text-align:center}output{display:block;text-align:center;font-size:26px;font-weight:600;margin:14px 0}.error{color:#a22535}progress{width:100%;height:12px;accent-color:#174f77}.note{color:#53677a;font-size:16px}table{border-collapse:collapse;width:100%;font-size:14px}td,th{border:1px solid #dce4ec;padding:6px;word-break:break-word}.table-scroll{overflow:auto}a{color:#174f77}@media(max-width:520px){main{padding:0 12px}section,.card{padding:16px}.grid{grid-template-columns:1fr}h1{font-size:27px}.ticks{font-size:12px}.ball{width:24px;height:24px}.urn{width:29px;height:35px}}

/* A neutral track must not suggest a preselected 50% answer. */
input[type=range]{appearance:none;-webkit-appearance:none;background:transparent;height:30px;outline-offset:6px}
input[type=range]::-webkit-slider-runnable-track{height:8px;background:#d4dfe8;border:0;border-radius:8px}
input[type=range]::-moz-range-track{height:8px;background:#d4dfe8;border:0;border-radius:8px}
input[type=range]::-moz-range-progress{background:#d4dfe8;height:8px}
input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;height:24px;width:24px;margin-top:-8px;border-radius:50%;background:#174f77;border:3px solid white;box-shadow:0 0 0 1px #174f77}
input[type=range]::-moz-range-thumb{height:20px;width:20px;border-radius:50%;background:#174f77;border:3px solid white}
.urns{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:4px;max-width:420px}.urn{width:100%;height:38px;font-size:16px}
.balls{display:grid;grid-template-columns:repeat(5,28px);gap:6px}@media(max-width:520px){.balls{grid-template-columns:repeat(5,24px)}.urn{height:34px;font-size:14px}}