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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Learning topics and adjacent solution. */
.topic-tabs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-bottom:17px}.topic-tabs button{border:1px solid #dde3d3;background:transparent;border-radius:7px;min-height:46px;padding:10px 9px;font-size:10px;font-weight:500;display:flex;align-items:center;justify-content:center;gap:8px;line-height:1.3}.topic-tabs button>span{font-family:var(--display);font-size:17px;color:#8c9e77;white-space:nowrap}.topic-tabs button.selected{background:#e5ecd9;border-color:#a5b791;color:#344e29}.topic-tabs button.selected>span{color:#54763d}.topic-tabs button:hover{background:#ebefdf}.solution-card{display:flex;flex-direction:column;padding:26px 23px 21px}.solution-card h3{font-size:20px;margin-bottom:16px}.solution-card>.eyebrow{margin-bottom:12px}.solution-card .small-sticker{font-size:22px;right:18px;top:15px}.solution-card #solution-placeholder p{font-size:11px;color:#7b876d;line-height:1.8;margin:0}.solution-card .solution-panel{background:transparent;border:0;margin:0;padding:0;font-size:11px;color:#677858}.solution-card .solution-panel h4{font-size:11px;margin:18px 0 8px}.solution-card .solution-panel ol{padding-left:17px;line-height:1.8}.solution-doodle{font-family:Georgia,serif;font-size:31px;line-height:.8;display:flex;flex-direction:column;width:40px;text-align:center;position:relative;color:#9fb38a;margin:25px auto 27px;transform:rotate(-11deg)}.solution-doodle>span{line-height:.3;position:relative;top:-3px;font-size:39px}.solution-doodle i{position:absolute;left:65px;top:20px;transform:rotate(16deg);font-style:normal;font-family:var(--font);font-size:26px;color:#be9c7b}.solution-card #reveal-side{width:100%;font-size:11px;border-color:#bccaaa;min-height:37px}.round-progress{border-top:1px solid #d5dec7;margin-top:auto;padding-top:17px;padding-bottom:0}.round-progress>strong{font-size:13px;font-family:var(--display)}.round-progress>span{font-size:9px;color:#81916e;margin-left:7px}.round-progress .progress-track{margin-top:10px;height:4px}.round-progress>p{font-size:9px;color:#869574;margin-bottom:0;line-height:1.5}.solution-math{display:flex;align-items:center;justify-content:center;gap:10px;background:#e0e8d3;padding:15px 8px;border-radius:7px;margin:0 0 13px;min-height:96px}.solution-math .fraction{font-size:27px;min-width:30px}.mixed-whole{font-family:var(--display);font-size:35px;line-height:1;font-weight:500}.whole-input{width:58px;height:54px;min-width:0;text-align:center;border:1px solid #d7dfcc;background:#fafbf5;border-radius:6px;font-size:25px;padding:3px}.whole-input::placeholder{color:#a0ac90}.expand-indicator{font-size:19px;color:#7b9067;display:flex;flex-direction:column;text-align:center;gap:5px}.expand-indicator>span{font-size:8px;color:#94a182}.feedback.neutral{color:#7b886b}.rules-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.rules-grid article:nth-child(3){border-right:0}.rules-grid article:nth-child(-n+3){border-bottom:1px solid var(--line)}.rules-grid article:nth-child(4) .rule-symbol{background:#e7eddb;color:#778e61}.rules-grid article:nth-child(5) .rule-symbol{background:#eee6d7;color:#9c835e;font-size:14px}.rules-grid article:nth-child(6) .rule-symbol{background:#f0e1d5;color:#ad7a57}.round-progress{margin-top:21px}.rules-grid article:last-child{border:0}.exercise-actions .button-text{font-size:10px}.round-progress .progress-track{grid-column:auto;grid-row:auto}.hero h1 span{isolation:isolate}.hero h1 span:after{z-index:-1}
@media(max-width:1050px){.topic-tabs{gap:6px}.topic-tabs button{font-size:9px;gap:5px;padding:8px 5px}.topic-tabs button>span{font-size:15px}.solution-card{padding:25px 20px}.solution-card h3{font-size:18px}.equation{gap:22px}}
@media(max-width:790px){.topic-tabs{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.topic-tabs button{font-size:11px;padding:10px;min-height:42px;gap:10px}.practice-grid{grid-template-columns:minmax(0,1fr) 230px;gap:14px}.solution-card{padding:24px 18px 20px;display:flex}.solution-card .eyebrow{font-size:8px}.solution-card h3{font-size:17px}.solution-card .solution-panel{font-size:10px}.solution-card .solution-panel h4{font-size:10px}.solution-card #solution-placeholder p{font-size:10px}.solution-card #reveal-side{font-size:10px}.round-progress{padding-top:14px;margin-top:19px}.round-progress>span{font-size:8px}.round-progress>p{font-size:8px}.solution-card .small-sticker{font-size:17px;right:10px;top:10px}.exercise-toolbar{padding:13px 16px;gap:10px}.fresh-label{display:none}.exercise-body{padding:23px 20px}.equation{gap:15px}.exercise-actions{gap:3px;flex-wrap:wrap}.exercise-actions .button-primary{font-size:10px;padding:10px 12px}.exercise-actions .button-primary>span{margin-left:4px}.exercise-actions .button-text{font-size:9px;padding:10px 7px;min-height:35px}.next-button{width:31px;height:31px}.exercise-footer{padding:14px 16px;gap:10px}.exercise-footer>span{display:none}.task-navigation{width:100%;justify-content:center;gap:8px}.task-navigation button{min-width:28px}#round-caption{display:none}.fraction{font-size:29px}.fraction-input{width:55px}.fraction-input input{font-size:23px}.whole-input{width:45px;height:48px}.math-operator,.math-equals{font-size:25px}.mixed-whole{font-size:31px}.question-prompt{font-size:12px}.answer-hint{font-size:9px}.rules-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.rules-grid article{padding:23px 18px;border-right:1px solid var(--line);border-bottom:0}.rules-grid article:nth-child(2){border-right:1px solid var(--line)}.rules-grid article:nth-child(3){border-right:0;border-bottom:1px solid var(--line)}}
@media(max-width:600px){.practice-grid{grid-template-columns:1fr}.solution-card{padding:20px;min-height:0}.solution-card h3{font-size:19px;margin-bottom:12px}.solution-card .eyebrow{font-size:8px}.solution-card #solution-placeholder{display:flex;justify-content:space-between;gap:15px;align-items:center}.solution-card #solution-placeholder p{font-size:11px}.solution-doodle{display:none}.solution-card #reveal-side{width:auto;min-height:37px;flex-shrink:0}.solution-card #solution-placeholder br:nth-of-type(2){display:none}.solution-card .solution-panel{font-size:12px}.solution-card .solution-panel h4{font-size:12px}.solution-math{width:100%;max-width:100%;margin-bottom:13px}.round-progress{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:19px;padding-top:15px}.round-progress>span{margin-left:0;font-size:9px}.round-progress .progress-track{width:80px;margin:0 0 0 auto}.round-progress>p{width:100%;margin:0;font-size:9px}.exercise-body{padding:22px 23px}.exercise-actions{gap:8px;flex-wrap:nowrap}.exercise-actions .button-primary{font-size:11px}.exercise-actions .button-text{font-size:10px}.equation{gap:25px;min-height:144px}.fraction{font-size:33px}.fraction-input{width:60px}.answer-input input{height:43px}.answer-input:after{top:49px}.exercise-footer>span{display:block}#round-caption{display:none}.task-navigation{justify-content:flex-end;gap:6px;width:auto;margin-left:auto}.task-navigation button{min-width:26px}.fresh-label{display:flex;font-size:8px}.question-prompt{font-size:14px}.answer-hint{font-size:10px}.topic-tabs button{font-size:10px;min-height:42px;padding:9px 6px;gap:7px}.topic-tabs button>span{font-size:15px}.rules-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.rules-grid article{border-bottom:1px solid var(--line)!important;border-right:1px solid var(--line)!important;padding:20px 17px}.rules-grid article:nth-child(even){border-right:0!important}.rules-grid article:nth-last-child(-n+2){border-bottom:0!important}}
@media(max-width:380px){.topic-tabs button{font-size:9px;gap:5px;padding:9px 4px}.topic-tabs button>span{font-size:13px}.equation{gap:18px}.exercise-body{padding:21px 17px}.exercise-actions{gap:3px}.exercise-actions .button-primary{padding:10px;font-size:10px}.exercise-actions .button-text{font-size:9px}.solution-card{padding:18px}.solution-card #solution-placeholder p{font-size:10px}.solution-card #reveal-side{font-size:9px;padding:10px}.fresh-label{display:none}}

/* One exercise at a time. */
.single-task-note{border-top:1px solid #d5dec7;margin:22px 0 0;padding-top:16px;color:#81916e;font-size:10px;line-height:1.8}.solution-card>p.single-task-note{font-size:10px;line-height:1.8;margin:22px 0 0}.exercise-card{align-self:start}.exercise-actions{padding-bottom:3px}.reload-note{text-align:center;line-height:1.6}.solution-card{height:100%}@media(max-width:600px){.solution-card{height:auto}.single-task-note br{display:none}.single-task-note br:after{content:" "}.reload-note{font-size:8px}}