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svg{fill:none;stroke:currentColor;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;width:23px;height:23px}.textbook-ai__connector{width:100%;height:28px;position:relative}.textbook-ai__connector:before{content:"";background:var(--color-dark-blue);border-radius:999px;height:3px;position:absolute;top:13px;left:10px;right:12px}.textbook-ai__connector:after{content:"";border-top:3px solid var(--color-dark-blue);border-right:3px solid var(--color-dark-blue);width:12px;height:12px;position:absolute;top:7px;right:10px;transform:rotate(45deg)}.textbook-ai__ai-content{text-align:center;flex-direction:column;align-items:center;display:flex}.textbook-ai__ai-content>p{color:#7282a9;font-size:var(--type-ui-body-size);font-weight:var(--type-ui-body-weight);line-height:var(--type-ui-body-line-height);letter-spacing:var(--type-ui-body-letter-spacing);margin:7px 0 0}.textbook-ai__ai-logo{color:var(--color-dark-blue);font-size:var(--type-heading-size);font-weight:var(--font-weight-bold);line-height:var(--type-heading-line-height);letter-spacing:var(--type-heading-letter-spacing);margin-top:3px}.textbook-ai__loader{background:conic-gradient(var(--color-dark-blue) 0 31%, #dbe5ff 31% 100%);border-radius:50%;width:76px;height:76px;margin:29px 0 19px;animation:1.35s linear infinite textbook-ai-loading;position:relative}.textbook-ai__loader:after{content:"";background:#fff;border-radius:50%;position:absolute;inset:10px}.textbook-ai__status{color:var(--color-dark-blue);font-size:var(--type-ui-title-size);font-weight:var(--font-weight-bold);line-height:var(--type-ui-title-line-height);letter-spacing:var(--type-ui-title-letter-spacing)}.textbook-ai__steps{text-align:left;width:100%;margin:28px 0 0;padding:0;list-style:none}.textbook-ai__steps li{color:#53669d;font-size:var(--type-ui-body-size);font-weight:var(--type-ui-body-weight);line-height:var(--type-ui-body-line-height);letter-spacing:var(--type-ui-body-letter-spacing);padding-left:27px;position:relative}.textbook-ai__steps li+li{margin-top:15px}.textbook-ai__steps li:before{content:"";border-bottom:2px solid var(--color-dark-blue);border-left:2px solid var(--color-dark-blue);width:13px;height:7px;position:absolute;top:1px;left:2px;transform:rotate(-45deg)}@media (width>=769px){.textbook-ai{width:calc(100% - var(--wide-content-gutter) - var(--wide-content-gutter));max-width:var(--wide-content-width)}}@keyframes textbook-ai-loading{to{transform:rotate(1turn)}}@media (prefers-reduced-motion:reduce){.textbook-ai__loader{animation:none}}.book-page{background:linear-gradient(90deg,#1e3f820f,#0000 18px),#fffefb;border:1px solid #27488b1c;border-radius:8px 18px 18px 8px;min-height:390px;padding:24px 25px 68px;position:relative;overflow:hidden;transform:rotate(-1.5deg);box-shadow:0 16px 32px #344b8021}.book-page:after{content:"";background:linear-gradient(90deg,#0000,#23427c0f);width:9px;height:100%;position:absolute;top:0;right:0}.book-page__heading{border-bottom:1px solid #dbe2ef;align-items:center;gap:12px;padding-bottom:12px;display:flex}.book-page__heading strong{color:#122d62;font-size:var(--type-subheading-size);font-weight:var(--type-subheading-weight);line-height:var(--type-subheading-line-height);letter-spacing:var(--type-subheading-letter-spacing)}.book-page__number{background:var(--color-dark-blue);color:#fff;width:32px;height:32px;font-size:var(--type-ui-title-size);font-weight:var(--font-weight-bold);line-height:var(--type-ui-title-line-height);place-items:center;display:grid}.book-page__instruction{color:#35486f;font-size:var(--type-ui-body-size);font-weight:var(--type-ui-body-weight);line-height:var(--type-ui-body-line-height);letter-spacing:var(--type-ui-body-letter-spacing);margin:14px 0 0}.book-page__exercise{color:#293c64;font-size:var(--type-ui-caption-size);font-weight:var(--type-ui-caption-weight);line-height:var(--type-ui-caption-line-height);letter-spacing:var(--type-ui-caption-letter-spacing);margin:14px 0 0;padding-left:20px}.book-page__exercise li+li{margin-top:7px}.book-page__exercise span{border-bottom:1px solid 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svg{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;width:19px;height:19px}.task-preview__tag{color:var(--color-dark-blue);font-size:var(--type-ui-caption-size);line-height:var(--type-ui-caption-line-height);white-space:nowrap;background:#edf3ff;border-radius:999px;margin-left:auto;padding:10px 12px}.task-preview h4{color:#102d67;font-size:var(--type-ui-title-size);font-weight:var(--font-weight-bold);line-height:var(--type-ui-title-line-height);letter-spacing:var(--type-ui-title-letter-spacing);margin:28px 0 24px}.task-preview__sentences{flex-direction:column;gap:16px;display:flex}.task-preview__sentences p{color:#17356f;font-size:var(--type-ui-body-size);font-weight:var(--type-ui-body-weight);line-height:var(--type-ui-body-line-height);letter-spacing:var(--type-ui-body-letter-spacing);flex-wrap:wrap;align-items:center;gap:8px;margin:0;display:flex}.task-preview__sentences p>span{color:#6680b7;width:18px;font-size:var(--type-ui-caption-size)}.task-preview__sentences i{background:#e3faf680;border:1px solid #1fb8a473;border-radius:7px;width:110px;height:31px;display:inline-block}.task-preview__actions{grid-template-columns:.9fr 1.25fr;gap:10px;display:grid;position:absolute;bottom:26px;left:25px;right:25px}.task-preview__actions button{min-width:0;min-height:47px;font-size:var(--type-ui-button-size);font-weight:var(--type-ui-button-weight);line-height:var(--type-ui-button-line-height);letter-spacing:var(--type-ui-button-letter-spacing);cursor:default;border-radius:14px;padding:10px 12px}.task-preview__check{border:1px solid var(--color-dark-blue);background:var(--color-dark-blue);color:#fff;justify-content:center;align-items:center;gap:7px;display:flex}.task-preview__check svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.task-preview__answers{color:#17356f;background:#fff;border:1px solid #d4dff5}@media (width<=1280px){.textbook-ai__process{grid-template-columns:minmax(0,1.04fr) 48px minmax(245px,.82fr) 48px minmax(0,1.34fr)}.textbook-ai__card--book,.textbook-ai__card--ai,.textbook-ai__card--result{padding-left:20px;padding-right:20px}.task-preview__actions{left:20px;right:20px}}@media (width<=1024px) and (width>=821px){.textbook-ai{--type-ui-title-size:15px;--type-ui-body-size:12px;--type-ui-caption-size:11px}.textbook-ai__process{grid-template-columns:minmax(0,1fr) 34px minmax(220px,.8fr) 34px minmax(0,1.2fr)}.textbook-ai__card{border-radius:26px;height:525px}.textbook-ai__connector:before{left:5px;right:9px}.textbook-ai__connector:after{right:7px}.textbook-ai__steps li{padding-left:22px}.book-page{min-height:372px;padding-left:17px;padding-right:17px}.task-preview__tag{padding-left:8px;padding-right:8px}.task-preview__sentences{gap:13px}.task-preview__sentences p{gap:5px}.task-preview__sentences i{width:82px}.task-preview__actions{grid-template-columns:1fr;gap:7px}.task-preview__actions button{min-height:39px}}@media (width<=820px){.textbook-ai-section{padding:76px 0 84px}.textbook-ai__intro{margin-bottom:36px}.textbook-ai__intro p{margin-top:18px}.textbook-ai__process{flex-direction:column;align-items:stretch;max-width:560px;margin:0 auto;display:flex}.textbook-ai__card{width:100%;height:auto;min-height:520px}.textbook-ai__card--ai{min-height:500px}.textbook-ai__connector{align-self:center;width:28px;height:58px}.textbook-ai__connector:before{width:3px;height:auto;inset:10px auto 12px 13px}.textbook-ai__connector:after{top:auto;bottom:10px;right:7px;transform:rotate(135deg)}.task-preview__actions{margin-top:30px;position:static}}@media (width<=768px){.textbook-ai-section{padding:64px 0 72px}.textbook-ai{padding-left:24px;padding-right:24px}.textbook-ai__card{border-radius:24px;min-height:0;padding:22px 20px 24px}.textbook-ai__card--book{padding-bottom:98px}.textbook-ai__card--ai{min-height:485px}.textbook-ai__stage{margin-bottom:16px}.textbook-ai__upload-chip{bottom:18px;left:18px;right:18px}.textbook-ai__ai-logo{font-size:var(--type-heading-size)}.book-page{min-height:370px;padding:22px 18px 62px}.book-page__exercise span{width:50px}.task-preview__toolbar{flex-wrap:wrap}.task-preview__tag{margin-left:auto}.task-preview h4{margin:24px 0 22px}.task-preview__sentences{gap:13px}.task-preview__sentences p{gap:6px}.task-preview__sentences i{width:92px;height:30px}.task-preview__actions{grid-template-columns:1fr}}@media (width<=390px){.textbook-ai__card--book,.textbook-ai__card--ai,.textbook-ai__card--result{padding-left:16px;padding-right:16px}.textbook-ai__upload-chip{left:14px;right:14px}.book-page{padding-left:14px;padding-right:14px}.task-preview__tag{padding:8px}}#solutions.section{isolation:isolate;background:linear-gradient(#fff 0%,#f7f9ff 52%,#fff 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p{color:#53669d;font-size:var(--type-body-size);font-weight:var(--type-body-weight);line-height:var(--type-body-line-height);letter-spacing:var(--type-body-letter-spacing);margin:12px 0 0}.solution-card__content strong{color:var(--color-dark-blue);font-size:var(--type-subheading-size);font-weight:var(--type-subheading-weight);line-height:var(--type-subheading-line-height);letter-spacing:var(--type-subheading-letter-spacing);margin-top:auto;padding-top:23px;position:relative}.solution-card__content strong:before{content:"";background:var(--color-dark-blue);border-radius:999px;width:30px;height:2px;position:absolute;top:10px;left:0}@media (width<=1024px){.solutions{min-height:0}.solutions__intro{width:100%;margin-bottom:36px}.solutions__intro br{display:none}.solutions__cards{grid-template-columns:repeat(2,minmax(0,1fr))}.solution-card:last-child{grid-column:1/-1}.solution-card:last-child .solution-card__content h3{max-width:none}}@media (width<=768px){#solutions.section{padding:68px 0 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