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.icon{display:block;width:min(9rem,42%);height:auto;margin:0;border-radius:22%;box-shadow:0 .75rem 2rem #0000004d;animation:splash-in .6s cubic-bezier(.34,1.4,.64,1) both}#splash h1{margin:0;padding:1.5rem 0 0;font-size:2.6rem;font-weight:400;letter-spacing:.01em;color:#fff;animation:splash-in .6s cubic-bezier(.34,1.4,.64,1) .1s both}#splash .tagline{margin:.25rem 0 0;font-size:1.05rem;color:#ffffffb3;animation:splash-in .6s ease .2s both}#splash .splash-progress{width:min(9rem,42%);height:.25rem;margin-top:2rem;border-radius:999px;background-color:#ffffff2e;overflow:hidden}#splash .splash-progress:after{content:"";display:block;width:40%;height:100%;border-radius:inherit;background-color:#9be8b6;animation:splash-sweep 1.1s ease-in-out infinite}#splash #footer{position:absolute;bottom:0;left:0;right:0;color:#fff9;padding-bottom:max(.75rem,env(safe-area-inset-bottom))}@keyframes splash-in{0%{opacity:0;transform:translateY(.75rem) scale(.96)}to{opacity:1;transform:none}}@keyframes splash-sweep{0%{transform:translate(-100%)}to{transform:translate(250%)}}@media(prefers-reduced-motion:reduce){#splash .splash-progress:after{width:100%;animation-name:splash-fade!important;animation-duration:1.6s!important;animation-iteration-count:infinite!important}@keyframes splash-fade{0%,to{opacity:.3}50%{opacity:1}}}#loader{position:fixed;top:50%;left:50%;width:var(--app-width);height:var(--app-height);max-height:100dvh;transform:translate(-50%,-50%);z-index:10000;background-color:#00000080;display:flex;align-items:center;justify-content:center}.cssload-loader{width:3.5rem;height:3.5rem;box-sizing:border-box;border-radius:50%;border:.3rem solid rgba(255,255,255,.25);border-top-color:#fff;animation:loader-spin .8s linear infinite}@keyframes loader-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.cssload-loader{border-top-color:#ffffff40;animation-name:loader-pulse!important;animation-duration:1.4s!important;animation-timing-function:ease-in-out!important;animation-iteration-count:infinite!important}@keyframes loader-pulse{0%,to{opacity:.35}50%{opacity:1}}}#header{padding:.75rem .75rem .85rem;padding-top:max(.75rem,env(safe-area-inset-top));background-color:var(--green-700);position:relative;flex:0 0 auto;box-sizing:border-box;display:flex;flex-direction:column;gap:.5rem;box-shadow:0 .15rem .6rem #1f2e2a4d;color:var(--on-dark);z-index:2}#header .header-row{display:flex;align-items:center;gap:.5rem;min-height:max(2.5rem,44px)}#header h1{flex:1 1 auto;min-width:0;margin:0;padding:0;font-weight:400;font-size:1.6rem;line-height:1.35;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#header .header-end{flex:0 0 auto;min-width:max(2.5rem,44px);display:flex;justify-content:flex-end;align-items:center}#header select{color:#ffffffe6;border-bottom-color:#ffffffe6}#header select option{color:#000}#footer{padding:.3rem .5rem;padding-bottom:max(.3rem,env(safe-area-inset-bottom));font-size:.8rem;flex:0 0 auto;color:var(--ink-muted)}#content{flex:1 1 auto;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:.75rem 1rem;box-sizing:border-box}.play{display:flex;flex-direction:column;justify-content:space-evenly;gap:.5rem;height:100%;min-height:0}.equation{padding:.75rem 1rem;margin:0 auto;width:min(20rem,100%);box-sizing:border-box;background:var(--surface);border-radius:var(--radius-3);box-shadow:var(--shadow-2);color:var(--ink)}.equation .katex{font-size:2.4rem;color:var(--ink)}.description{padding:0 .5rem .4rem;font-size:1rem;color:var(--ink-muted)}.answer{padding:0 .5rem .25rem}.answer input{width:min(20rem,100%);height:2.75rem;border:0;border-bottom:.12rem solid var(--line);border-radius:var(--radius-1) var(--radius-1) 0 0;padding:0;background-color:transparent;font-size:2.25rem;font-weight:700;color:var(--ink);text-align:center;caret-color:var(--green-700);transition:border-color .15s ease,background-color .15s ease}.answer input:focus-visible{outline:none;border-bottom-color:var(--green-700);border-bottom-width:.18rem;background-color:transparent;box-shadow:0 .35rem 0 -.28rem #41635a59}.incorrect{min-height:1.25rem}.input{margin-bottom:1rem}.next button{border:.1rem solid #bbb;font-size:1.25rem;padding:.5rem 1rem;border-radius:.5rem;color:#fff;font-weight:700}.title-under{font-size:1.25rem;margin-top:0}#header .difficulty{display:flex;align-items:center;justify-content:center;gap:.5rem;font-size:1rem;color:#ffffffbf}.dropdown{position:relative;display:inline-block}.dropdown-trigger{display:flex;align-items:center;gap:.35rem;min-height:max(1.9rem,32px);padding:.2rem .4rem .2rem .6rem;border:0;border-radius:var(--radius-1);background-color:var(--surface);color:var(--ink);font-size:1rem;font-weight:700;cursor:pointer;box-shadow:var(--shadow-1);transition:background-color .15s ease,box-shadow .15s ease}.level-meter{width:1.15rem;height:1.05rem;flex:0 0 auto;overflow:visible}.level-meter .bar{stroke:currentColor;stroke-width:3;stroke-linecap:round;opacity:.22;transition:opacity .15s ease,stroke .15s ease}.level-meter .bar.filled{opacity:1;stroke:var(--tone, currentColor)}.level-meter.tone-easy{--tone: #3F9E6A}.level-meter.tone-medium{--tone: #C9922E}.level-meter.tone-hard{--tone: #D9722F}.level-meter.tone-extreme{--tone: #D4453F}.dropdown.on-dark .dropdown-trigger .level-meter.tone-easy{--tone: #7BD6A0}.dropdown.on-dark .dropdown-trigger .level-meter.tone-medium{--tone: #F0C368}.dropdown.on-dark .dropdown-trigger .level-meter.tone-hard{--tone: #F5A26A}.dropdown.on-dark .dropdown-trigger .level-meter.tone-extreme{--tone: #F58079}.dropdown.on-dark .dropdown-trigger .level-meter .bar{opacity:.35}.dropdown.on-dark .dropdown-trigger .level-meter .bar.filled{opacity:1}.dropdown-option-label{display:flex;align-items:center;gap:.5rem}.dropdown-caret{width:1rem;height:1rem;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}.dropdown-trigger[aria-expanded=true] .dropdown-caret{transform:rotate(180deg)}.dropdown-list{position:absolute;top:calc(100% + .3rem);left:0;z-index:50;min-width:100%;margin:0;padding:.25rem;list-style:none;background:var(--surface);border-radius:var(--radius-2);box-shadow:var(--shadow-3);max-height:12rem;overflow-y:auto;text-align:left}[dir=rtl] .dropdown-list{left:auto;right:0;text-align:right}.dropdown-option{display:flex;align-items:center;justify-content:space-between;gap:.75rem;min-height:max(2.1rem,36px);padding:.3rem .6rem;border-radius:var(--radius-1);color:var(--ink);font-size:1.05rem;cursor:pointer;white-space:nowrap}.dropdown-option.active{background-color:var(--surface-2)}.dropdown-option.selected{font-weight:700}.dropdown-option.selected .dropdown-check{color:var(--green-700)}.dropdown-check{width:.9rem;height:.9rem;flex:0 0 auto;fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.dropdown.on-dark .dropdown-trigger{background-color:#ffffff24;color:#fff;box-shadow:none}@media(hover:hover){.dropdown.on-dark .dropdown-trigger:hover{background-color:#ffffff3d}}.dropdown.on-dark .dropdown-trigger:focus-visible{background-color:#ffffff3d;box-shadow:0 0 0 .3rem #ffffff4d}.dropdown.on-dark .dropdown-list{color:var(--ink)}#header .score{position:relative;display:flex;align-items:center;justify-content:flex-end;line-height:1;font-size:1.25rem}#header .score .total{color:#fff;font-size:1.15rem;font-weight:700;font-variant-numeric:tabular-nums;background-color:#ffffff24;border-radius:999px;padding:.2rem .6rem;min-width:1.9rem;text-align:center;line-height:1.2;transition:background-color .2s ease}#header .score .total.bump{animation:score-bump .45s cubic-bezier(.34,1.56,.64,1)}@keyframes score-bump{0%{transform:scale(1);background-color:#ffffff24}35%{transform:scale(1.25);background-color:#9be8b661}to{transform:scale(1);background-color:#ffffff24}}#header .score .additional{position:absolute;right:0;top:calc(100% + .1rem);font-size:.95rem;font-weight:700;color:#9be8b6;white-space:nowrap;visibility:hidden;opacity:0;pointer-events:none}[dir=rtl] #header .score .additional{right:auto;left:0}#header .score .additional.show{visibility:visible;animation:score-float 1s ease-out}@keyframes score-float{0%{opacity:0;transform:translateY(.4rem) scale(.85)}25%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-1.4rem) scale(1)}}.incorrect{font-size:1rem;color:#e85e5e;height:1.25rem}.number-pad{text-align:center;width:min(20rem,100%);max-width:100%;margin:0 auto;box-sizing:border-box;display:grid;grid-template-columns:repeat(3,1fr);gap:.4rem;padding:0 .25rem}.number-pad .key{width:100%;display:flex;align-items:center;justify-content:center;line-height:1;height:max(3.9rem,48px);color:#1f2e2a;font-size:2rem;border:0;border-radius:.5rem;background-color:#fff;font-weight:700;box-sizing:border-box;box-shadow:var(--shadow-1);border-radius:var(--radius-2);transition:transform .08s ease,box-shadow .08s ease,background-color .08s ease;cursor:pointer;background-size:100%}@media(hover:hover){.number-pad .key:hover{background-color:var(--surface-2);box-shadow:var(--shadow-2)}}.number-pad .key.enter{grid-column:1 / -1}.number-pad .key.with-icon{padding:0;line-height:1;display:flex;align-items:center;justify-content:center}.number-pad .key.with-icon svg{display:block;width:1.7rem;height:1.7rem;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.number-pad .key:active{background-color:var(--line);box-shadow:none;transform:translateY(.1rem) scale(.97)}.number-pad .key.enter{background-color:var(--green-700);box-shadow:var(--shadow-2);height:max(3.2rem,46px);line-height:1;margin-top:.15rem}@media(hover:hover){.number-pad .key.enter:hover{background-color:var(--green-500)}}.number-pad .key.enter:active{background-color:var(--green-900)}.number-pad .key.enter{color:#fff}.number-pad .key.enter svg{stroke-width:2.4}.menu-toggle{flex:0 0 auto;display:flex;align-items:center;justify-content:center;box-sizing:border-box;width:max(2.5rem,44px);height:max(2.5rem,44px);padding:0;background:transparent;color:var(--on-dark);border:0;border-radius:var(--radius-2);box-shadow:none;transition:background-color .15s ease;cursor:pointer}.menu-toggle svg{width:1.5rem;height:1.5rem;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}@media(hover:hover){.menu-toggle:hover{background-color:#ffffff24}}.menu-toggle:active{background-color:#ffffff38;box-shadow:none;transform:none}#menu-viewport{position:fixed;top:50%;left:50%;width:var(--app-width);height:var(--app-height);max-height:100dvh;transform:translate(-50%,-50%);overflow:hidden;z-index:9999;pointer-events:none}#side-menu{display:flex;flex-direction:column;position:absolute;top:0;left:0;height:100%;width:min(20rem,80%);background:#f4f7f6;box-sizing:border-box;transform:translate(-100%);transition:transform .3s cubic-bezier(.4,0,.2,1),box-shadow .3s ease;box-shadow:none;overflow-y:auto;pointer-events:auto;padding-bottom:env(safe-area-inset-bottom)}#side-menu.open{box-shadow:#00000059 0 0 1.5rem .1rem}[dir=rtl] #side-menu{left:auto;right:0;transform:translate(100%)}#side-menu.open,[dir=rtl] #side-menu.open{transform:translate(0)}#side-menu .menu-header{flex:0 0 auto;padding:1.25rem 1.5rem;padding-top:max(1.25rem,env(safe-area-inset-top));background:#41635a;color:#fff;font-size:1.5rem;text-align:left;letter-spacing:.02em}[dir=rtl] #side-menu .menu-header{text-align:right}#side-menu ul{list-style:none;padding:.5rem 0;margin:0;flex:0 0 auto}#side-menu li{padding:0}#side-menu .menu-item{display:flex;align-items:center;gap:1rem;width:100%;box-sizing:border-box;padding:.9rem 1.5rem;border:0;background:transparent;color:#1f2e2a;font-size:1.5rem;text-align:left;cursor:pointer;transition:background-color .15s ease,color .15s ease}[dir=rtl] #side-menu .menu-item{text-align:right}#side-menu .menu-icon{flex:0 0 auto;width:1.5rem;height:1.5rem;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;opacity:.9}#side-menu .menu-icon .podium-step{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linejoin:round}#side-menu .menu-icon .trophy-bowl{fill:currentColor;stroke:currentColor;stroke-width:1.4;stroke-linejoin:round}#side-menu .menu-icon .podium-rank{fill:currentColor;stroke:none;font-size:7px;font-weight:700;text-anchor:middle}#side-menu .menu-icon .podium-rank.first{font-size:8px}#side-menu .menu-footer{margin-top:auto;padding:.75rem;border-top:.05rem solid var(--line)}#side-menu .menu-install{display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;min-height:max(2.6rem,44px);padding:.5rem .75rem;border:0;border-radius:var(--radius-2);background-color:var(--green-700);color:#fff;font-size:1.1rem;cursor:pointer;transition:background-color .15s ease}@media(hover:hover){#side-menu .menu-install:hover{background-color:var(--green-500)}}#side-menu .menu-install:active{background-color:var(--green-900)}#side-menu .install-help{margin:.5rem 0 0;font-size:.85rem;line-height:1.4;color:var(--ink-muted);text-align:left}[dir=rtl] #side-menu .install-help{text-align:right}@media(hover:hover){#side-menu .menu-item:hover{background-color:#dce2e1}}#side-menu .menu-item:active{background-color:#c7d2cf}#side-menu .menu-item:focus-visible{outline:.12rem solid #41635A;outline-offset:-.25rem;background-color:#dce2e1;box-shadow:none}#side-menu .menu-item.current:focus-visible{box-shadow:inset .25rem 0 #41635a}[dir=rtl] #side-menu .menu-item.current:focus-visible{box-shadow:inset -.25rem 0 #41635a}#side-menu .menu-item.current{color:#41635a;font-weight:700;background-color:#e4ebe9;box-shadow:inset .25rem 0 #41635a}[dir=rtl] #side-menu .menu-item.current{box-shadow:inset -.25rem 0 #41635a}#side-menu .menu-item.current .menu-icon{opacity:1}.menu-overlay{position:fixed;top:50%;left:50%;width:var(--app-width);height:var(--app-height);max-height:100dvh;transform:translate(-50%,-50%);z-index:9998;background-color:#00000073;opacity:0;transition:opacity .3s ease}.menu-overlay.open{opacity:1}#login{overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:2rem}#login h1{margin:1rem;padding:0;font-size:2.5rem;line-height:1.3;min-height:0;height:auto;overflow:visible}#login .login-pane{width:min(25rem,90%);margin:4rem auto 1rem;text-align:left;display:none}[dir=rtl] #login .login-pane{text-align:right}#login.email-input .login-pane.email,#login.phone-input .login-pane.phone-number,#login.code-input .login-pane.code,#login .login-pane label{display:block}#login .login-pane input{width:100%;border:0;background-color:transparent;border-bottom:.08rem solid var(--line)}button.action{font-size:1.6rem;display:block;width:100%;min-height:max(3rem,44px);padding:.6rem 1rem;margin:1.25rem auto;border:0;background-color:var(--green-700);color:#fff;border-radius:var(--radius-2);box-shadow:var(--shadow-2);transition:transform .08s ease,box-shadow .08s ease,background-color .12s ease;cursor:pointer}@media(hover:hover){button.action:hover{background-color:var(--green-500);box-shadow:var(--shadow-3)}}button.action:active{background-color:var(--green-900);box-shadow:var(--shadow-1);transform:translateY(.1rem)}button.action.secondary{background-color:transparent;color:var(--green-700);box-shadow:inset 0 0 0 .12rem var(--line)}@media(hover:hover){button.action.secondary:hover{background-color:var(--surface-2);box-shadow:inset 0 0 0 .12rem var(--green-500)}}button.action.secondary:active{background-color:var(--line);color:var(--green-900)}.col-1-2 button.action{width:93%;margin-top:0}[dir=ltr] .col-1-2:first-child button.action{margin-right:7%}[dir=ltr] .col-1-2:nth-child(2) button.action{margin-left:7%}[dir=rtl] .col-1-2:first-child button.action{margin-left:7%}[dir=rtl] .col-1-2:nth-child(2) button.action{margin-right:7%}.well{text-align:left;padding:1.5rem;margin:0 auto 1.25rem;box-shadow:var(--shadow-2);background:var(--surface);border-radius:var(--radius-3);box-sizing:border-box;font-size:1.5rem}.well .field+.field{margin-top:1.25rem}.well .field input{margin-bottom:0}.well .field label,.well .field-label{display:block;font-size:1rem;color:var(--ink-muted);margin-bottom:.35rem}.dropdown.block{display:block;width:100%}.dropdown.block .dropdown-trigger{width:100%;justify-content:flex-start;min-height:max(2.6rem,44px);padding:.35rem .6rem;font-size:1.25rem;background-color:var(--surface-2);box-shadow:inset 0 0 0 .08rem var(--line)}.dropdown.block .dropdown-value{flex:1 1 auto;text-align:left}[dir=rtl] .dropdown.block .dropdown-value{text-align:right}@media(hover:hover){.dropdown.block .dropdown-trigger:hover{background-color:#eaf0ee}}[dir=rtl] .well{text-align:right}.well select{background:transparent;border:0;border-bottom:.08rem solid var(--line);color:var(--ink);padding:.25rem 0;transition:border-color .15s ease}.well label{display:block;font-size:1rem;color:var(--ink-muted);margin-bottom:.35rem}.well input{width:100%;border:0;border-bottom:.08rem solid var(--line);color:var(--ink);margin-bottom:1.25rem;padding:.15rem 0;line-height:1.4;transition:border-color .15s ease}.well input:last-child{margin-bottom:0}.well input[type=number]{appearance:textfield;-moz-appearance:textfield}.well input[type=number]::-webkit-outer-spin-button,.well input[type=number]::-webkit-inner-spin-button{appearance:none;-webkit-appearance:none;margin:0}.form-message{display:flex;align-items:flex-start;gap:.4rem;margin:.4rem 0 0;font-size:.95rem;line-height:1.35;text-align:left;animation:form-message-in .18s ease-out}[dir=rtl] .form-message{text-align:right}.form-message.error{color:#c0392f}.form-message.success{color:#2f7d51}.form-message-icon{width:1.05rem;height:1.05rem;flex:0 0 auto;margin-top:.1rem;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}@keyframes form-message-in{0%{opacity:0;transform:translateY(-.15rem)}to{opacity:1;transform:none}}.well .field.has-error input,.well .field.has-error select,.field.has-error input,.field.has-error select{border-bottom-color:#c0392f}.well .field.has-error input:focus-visible{border-bottom-color:#c0392f;box-shadow:inset 0 -.16rem 0 -.08rem #c0392f,0 .3rem 0 -.24rem #c0392f59}.well .field:has(input){padding-bottom:1.4rem;position:relative}.well .field .form-message{position:absolute;bottom:0;left:0;right:0;margin:0}.well .field:has(input)+.field{margin-top:.5rem}#login>.form-message{justify-content:center;margin:.25rem 1rem 1rem;font-size:1.05rem}#competition .progress{text-align:left;font-size:1.5rem;color:#5a6b66}[dir=rtl] #competition .progress{text-align:right}#competition-finish .part{text-align:center;margin:1rem 0}#competition-finish .score{font-weight:700;color:var(--accent);font-size:4.5rem;line-height:1.15}#competition-finish .time{font-size:1.25rem;color:var(--ink-muted)}.highscores{padding:.5rem}.table{width:100%;border-collapse:collapse}.table tr td,.table tr th{padding:1rem;font-size:1rem;text-align:left}[dir=rtl] .table tr td,[dir=rtl] .table tr th{text-align:right}.table thead th{font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;color:#5a6b66;border-bottom:.1rem solid #C7D2CF}.table .position{width:2.5rem;font-weight:700;color:var(--ink-muted);font-variant-numeric:tabular-nums}.table .hscore{text-align:right;font-weight:700;font-variant-numeric:tabular-nums;color:var(--ink)}[dir=rtl] .table .hscore{text-align:left}.table .name{color:var(--ink)}.table tbody tr:nth-child(1) .position{color:var(--accent)}.table tbody tr:nth-child(2) .position{color:#b8763e}.table tbody tr:nth-child(3) .position{color:#96794a}.highscores .empty{color:#5a6b66;font-size:1.25rem;text-align:center;margin:0}.table tr:nth-child(2n){background-color:#dce2e180}.table tr.self{background-color:#f8efef;font-weight:700;box-shadow:inset .2rem 0 #e85e5e}[dir=rtl] .table tr.self{box-shadow:inset -.2rem 0 #e85e5e}.clearfix:after{content:"";display:table;height:0;clear:both}.col{float:left}[dir=rtl] .col{float:right}.col-1-2{width:50%}.landscape-block{display:none}@media(orientation:landscape)and (max-height:500px){.landscape-block{position:fixed;inset:0;z-index:100000;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.5rem;padding:2rem;background-color:#41635a;color:#ffffffe6;text-align:center}.landscape-block .rotate-icon{width:4rem;height:6rem;border:.3rem solid rgba(255,255,255,.9);border-radius:.6rem;animation:rotate-hint 2s ease-in-out infinite}.landscape-block p{margin:0;font-size:1.5rem}#app-container,#side-menu,.menu-overlay{visibility:hidden}}@keyframes rotate-hint{0%,40%{transform:rotate(90deg)}60%,to{transform:rotate(0)}}