:root{--app-max-width: 700px}html{scrollbar-gutter:stable;overflow-y:scroll;height:100%}body{margin:0;padding:0;min-height:100vh;display:flex;flex-direction:column;line-height:1.6}#root{display:flex;flex-direction:column;min-height:100vh;width:100%}.app-root-container{width:100%;margin:0;padding:0;display:flex;flex-direction:column;min-height:100vh}.constrained-container{width:100%;max-width:var(--app-max-width);margin-left:auto;margin-right:auto;padding:0 8px;box-sizing:border-box}@media(min-width:600px){.constrained-container{padding:0 24px}}.full-width-container{width:100%;padding:0}.main-content{flex-grow:1;width:100%;padding-top:0}.app-header{width:100%;margin-bottom:0;padding:4px 0;position:relative;z-index:10}.header-content{display:flex;align-items:center;justify-content:center;width:100%;position:relative}.logo-container{display:flex;align-items:center;flex-shrink:0}.header-spacer{flex:1}.app-footer{width:100%;margin-top:auto;padding:24px 0;border-top:1px solid rgba(0,0,0,.12);text-align:center}@media(max-width:599px){.has-session-nav .app-footer{margin-bottom:70px}}.fade-in{animation:fadeIn .5s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}.progress-bar-wrapper{margin-top:24px;width:100%}.progress-bar-container{width:100%;background-color:#e0e0e0;border-radius:4px;height:4px;overflow:hidden}.progress-bar-fill{width:0%;height:100%;background-color:#ffab00;transition:width .3s ease-in-out}#progress-text{text-align:right;margin-top:4px;font-size:.9rem;color:#757575}.options-list{margin:0 0 24px;padding-left:0;list-style-type:none;width:100%}.option-item{display:flex;align-items:flex-start;padding:12px;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:10px;cursor:pointer;transition:background-color .2s,border-color .2s;width:100%}.option-item:hover{background-color:#304ffe0a;border-color:#7a7cff}.option-item input[type=radio]{margin-right:12px;accent-color:#304ffe;width:1.2em;height:1.2em;margin-top:.3em;flex-shrink:0}.option-item label{font-size:1rem;line-height:1.4;flex-grow:1;display:flex;flex-direction:column;cursor:inherit;width:100%}.option-text-container{display:flex;align-items:baseline;width:100%}.option-prefix{font-family:Montserrat,sans-serif;font-weight:700;margin-right:10px;color:#304ffe;min-width:1.8em;flex-shrink:0}.option-item.correct-answer .option-prefix{color:#4caf50}.option-item.selected-incorrect .option-text{color:#f44336;text-decoration:line-through}.option-specific-explanation{font-size:.9rem;color:#757575;margin-top:8px;padding:10px 12px;line-height:1.5;background-color:#0000000a;border-radius:6px;border-left:3px solid #616161;margin-left:calc(1.2em + 12px);word-break:break-word}.option-item.concealed{background-color:#f0f2f5;border-color:#e0e0e0;height:70px;overflow:hidden;align-items:center}.option-item.concealed .option-text-container{visibility:hidden}.question-element-appear{opacity:0;transform:translateY(10px);animation:elementAppear .4s ease-out forwards}@keyframes elementAppear{to{opacity:1;transform:translateY(0)}}.option-item-appear{opacity:0;transform:translate(-15px);animation:optionAppear .35s ease-out forwards}@keyframes optionAppear{to{opacity:1;transform:translate(0)}}