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button{padding:5.5px 6px}}@media screen and (width<=1400px){.teacher-workspace{grid-template-columns:260px minmax(0,1fr)}.teacher-content .answer-area{padding:22px}}@media print{.teacher-content{height:auto;min-height:0;display:block}.student-resize-handle{display:none}}@media screen{.grading-workspace{min-height:100dvh;padding-top:61px}.compact-workspace{--workspace-viewport-height:100dvh;min-height:var(--workspace-viewport-height);padding-top:61px}.compact-workspace>.student-solving-body{height:calc(var(--workspace-viewport-height) - 61px)}.grading-workspace .teacher-workspace,.grading-workspace .teacher-content{min-height:calc(100dvh - 61px)}}.lit-logo-link{flex-shrink:0;align-items:center;text-decoration:none;display:inline-flex}.lit-logo-link img{object-fit:cover;display:block}.lit-logo-link:focus-visible{outline:2px solid var(--color-primary);outline-offset:4px;border-radius:6px}@media screen{.grading-workspace .teacher-workspace,.grading-workspace .teacher-content{height:calc(100dvh - 61px);min-height:0}.teacher-content .details{flex-direction:column;min-height:0;display:flex;overflow:hidden}.teacher-content .detail-tabs{flex-shrink:0}.review-panel-scroll{overscroll-behavior:contain;flex:1;min-height:0;padding-bottom:24px;overflow:hidden auto}.teacher-content .answer-area{min-height:0;overflow-y:auto}.teacher-content .student-summary,.teacher-content .answer-card{flex-shrink:0}}.header{transition:background-color .3s,border-color .3s}.header.is-scrolled{-webkit-backdrop-filter:blur(8px)saturate(110%);backdrop-filter:blur(8px)saturate(110%);background:#ffffffeb;border-bottom-color:#dfe8f5cc}.header{height:61px;padding:11px 38px}.header nav{gap:15px}.header>img,.header .lit-logo-link img{width:75px;height:auto}.header .button,.compact-workspace .header .button,.grading-workspace .header .button{min-height:40px;font-size:calc(var(--font-text-md) * .85);line-height:calc(var(--line-text-md) * .85);border-radius:9px;padding:8px 22px}.landing-header{height:60px;padding:11px 38px}.landing-header nav{gap:15px}.landing-header .icon-button{width:22px;height:30px}.landing-header .lit-logo-link img{width:75px;height:auto}.landing-header .button{min-height:40px;font-size:calc(var(--font-text-md) * .85);line-height:calc(var(--line-text-md) * .85);border-radius:9px;padding:8px 22px}.compact-workspace .button,.grading-workspace .button{min-height:33px;font-size:calc(var(--font-text-md) * var(--ui-scale,.75));line-height:calc(var(--line-text-md) * var(--ui-scale,.75));border-radius:8px;padding:7px 19px}.compact-workspace .modal .button,.grading-workspace .modal .button{min-height:44px;font-size:var(--font-text-md);line-height:var(--line-text-md);border-radius:10px;padding:10px 26px}.header .icon-button svg,.header .icon-button img,.landing-header .icon-button svg,.landing-header .icon-button img{width:18px;height:18px}.header .icon-button{width:30px;height:30px}.landing-header .button,.landing-header .landing-outline{min-height:40px;font-size:calc(var(--font-text-md) * .85);line-height:calc(var(--line-text-md) * .85);border-radius:9px;padding:8px 22px}.student-summary-actions{gap:8px;display:flex}@media print{.student-summary-actions{display:none}}.skeleton{background:linear-gradient(100deg, var(--color-grey-10) 25%, var(--color-primary-background) 43%, var(--color-grey-10) 61%);background-size:220% 100%;border-radius:7px;min-width:0;animation:1.45s ease-in-out infinite skeleton-shimmer;display:block;overflow:hidden}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){.skeleton{animation:none}}.button{white-space:nowrap;line-height:var(--line-text-md);border-radius:10px;padding:10px 26px;transition:background-color .18s,border-color .18s,color .18s,transform .12s}@media (prefers-reduced-motion:reduce){.button{transition:none}}.neutral{background:var(--color-grey-10)}.danger{background:var(--color-danger-soft);color:var(--color-danger)}.primary{background:var(--primary);color:var(--color-white)}.search{background:var(--color-grey-10);color:var(--muted);border-radius:10px;align-items:center;gap:10px;padding:10px 20px;display:flex}.search input{width:100%;min-width:0;color:var(--color-black);background:0 0;border:0;outline:0;padding:0}.search input::placeholder{color:var(--muted)}.search svg{flex-shrink:0}.avatar{width:30px;height:30px;font-weight:var(--weight-regular);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.badge{background:var(--color-grey-30);color:var(--color-white);font-size:var(--font-caption);line-height:var(--line-caption);border-radius:10px;padding:5px 7.5px}.badge.submitted{background:var(--primary)}.badge.warning{background:var(--color-danger)}.question-tabs{border-bottom:1px solid var(--border);gap:20px;margin-bottom:20px;display:flex}.question-tabs button{width:75px;font-size:var(--font-text-md);line-height:var(--line-text-md);border-bottom:2.5px solid #0000;padding:5px 0}.question-tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}.detail-tabs{border-bottom:1px solid var(--border);justify-content:space-between;gap:5px;padding:10px 35px;display:flex}.detail-tabs button{width:100px;color:var(--color-grey-60);font-size:var(--font-text-sm);line-height:var(--line-text-sm);border-radius:10px;flex-shrink:0;padding:12.5px 0}.detail-tabs button.active{background:var(--color-primary-soft);color:var(--primary)}.avatar.small{width:25px;height:25px;font-size:var(--font-caption)}.button{font-size:var(--font-text-md);line-height:var(--line-text-md);justify-content:center;align-items:center;gap:10px;display:inline-flex}.button--small{font-size:var(--font-text-sm);border-radius:8px;padding:10px 19px}.button--large{font-size:var(--font-test-lg);font-weight:var(--weight-medium);border-radius:12px;padding:10px 30px}.button--danger{background:var(--color-danger);color:var(--color-white)}.button--white-primary{background:var(--color-primary-soft);color:var(--color-primary)}.button--white-danger{background:var(--color-danger-soft);color:var(--color-danger)}.button--ghost{color:var(--color-primary);border:1px solid var(--color-primary);background:0 0}.button--text{color:var(--color-primary);background:0 0}.button--primary:not(:disabled):hover{background:var(--color-primary-dark)}.button--danger:not(:disabled):hover{background:var(--color-danger-dark)}.button--secondary:not(:disabled):hover{background:var(--color-grey-30)}.button--white-primary:not(:disabled):hover{background:var(--color-primary-light);color:var(--color-white)}.button--white-danger:not(:disabled):hover{background:var(--color-danger-light);color:var(--color-white)}.button--ghost:not(:disabled):hover{border-color:var(--color-primary-dark);color:var(--color-primary-dark)}.button--text:not(:disabled):hover{background:var(--color-grey-10)}.button:disabled{background:var(--color-grey-20);color:var(--color-grey-10);cursor:not-allowed}.button--ghost:disabled,.button--text:disabled{color:var(--color-grey-20);background:0 0}.button--ghost:disabled{border-color:var(--color-grey-20)}.student-row:not(.selected):hover{background:var(--color-grey-10);border-color:var(--color-grey-20)}.avatar-large{width:50px;height:50px;font-size:var(--font-text-md);font-weight:var(--weight-medium)}.text-input-field{flex-direction:column;gap:5px;width:100%;display:flex}.text-input-field>label{color:var(--color-grey-60)}.text-input{border:1px solid var(--color-grey-20);background:var(--color-white);border-radius:10px;gap:10px;padding:10px 15px;display:flex}.text-input input{background:0 0;border:0;outline:0;width:100%;min-width:0}.text-input:focus-within{border-color:var(--color-primary)}.text-input--under-bar{border-width:0 0 1px;border-radius:0}.text-input[data-error=true]{border-color:var(--color-danger)}.input-error{font-size:var(--font-caption);color:var(--color-danger)}.modal{color:inherit;word-break:keep-all;overflow-wrap:anywhere;border:0;border-radius:20px;width:min(400px,100vw - 40px);min-width:0;max-width:calc(100vw - 40px);padding:20px}.modal::backdrop{background:#0000004d}.modal-heading{justify-content:space-between;align-items:center;gap:20px;display:flex}.modal-heading h2{font-size:var(--font-title-sm);line-height:var(--line-title-sm);font-weight:var(--weight-semibold);white-space:normal}.modal-heading{margin-bottom:20px}.modal--small{width:min(320px,100vw - 40px)}.modal--large{width:min(480px,100vw - 40px)}.modal-close{flex-shrink:0;padding:0;display:flex}.modal-actions{flex-direction:row;gap:10px;margin-top:20px;display:flex}.modal-actions .button{flex:1 1 0;width:auto;min-width:0}.segment-tabs{background:#e5e5ea;border-radius:14px;gap:4px;margin-bottom:20px;padding:4px;display:flex;overflow-x:auto}.segment-tabs button{color:#48484a;min-width:84px;font-size:var(--font-text-md);line-height:var(--line-text-md);white-space:nowrap;border-radius:10px;flex:1 1 0;padding:9px 14px;transition:background-color .18s,color .18s}.segment-tabs button:hover:not(.active){background:#f4f4f4}.segment-tabs button.active{color:#1c1c1e;box-shadow:none;background:#fff;font-weight:600}@media (prefers-reduced-motion:reduce){.segment-tabs button{transition:none}}.segment-tabs{align-self:flex-start;max-width:100%;display:inline-flex}.segment-tabs button{flex:none;min-width:0;padding-inline:20px}.segment-tabs{gap:6px;padding:6px}.segment-tabs button{padding:11px 28px;padding-block:8px;padding-inline:36px}.segment-tabs{position:relative}.segment-thumb{pointer-events:none;background:#fff;border-radius:10px;position:absolute;top:6px;bottom:6px;left:0}.segment-thumb.is-ready{transition:transform .28s cubic-bezier(.3,.8,.3,1),width .28s cubic-bezier(.3,.8,.3,1)}.segment-tabs button{z-index:1;position:relative}.segment-tabs button.active{background:0 0}.segment-tabs button:hover:not(.active){color:#1c1c1e;background:0 0}@media (prefers-reduced-motion:reduce){.segment-thumb.is-ready{transition:none}}.segment-tabs button{font-size:var(--font-test-lg);line-height:var(--line-test-lg);font-weight:500;transition:color .28s}.segment-tabs button.active{color:#007bff;font-weight:500}.segment-thumb{border:1px solid #e8e8ea;border-radius:12px}.detail-tabs{position:relative}.detail-tabs>button{z-index:1;position:relative}.segment-thumb.pill-thumb{background:#e2f0ff;border-color:#0000}.detail-tabs button.active,.detail-tabs button.active:hover{background:0 0}.detail-tabs button{transition:color .18s}.segment-tabs-wrap{align-self:flex-start;align-items:center;gap:8px;max-width:100%;margin-bottom:20px;display:flex}.segment-tabs-wrap>.segment-tabs{scrollbar-width:none;min-width:0;margin-bottom:0}.segment-tabs-wrap>.segment-tabs::-webkit-scrollbar{display:none}.segment-tabs-arrow{color:#48484a;cursor:pointer;background:#fff;border:1px solid #e8e8ea;border-radius:10px;flex:none;place-items:center;width:36px;height:36px;padding:0;transition:background-color .15s,color .15s;display:grid}.segment-tabs-arrow:hover:not(:disabled){background:#f4f4f4}.segment-tabs-arrow:disabled{color:#c6c6c6;cursor:default}.button{min-height:44px}.button--small{min-height:36px}.button--large{min-height:52px}.button:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}:root .teacher-select-label select,:root .auth-role-select select,:root .teacher-textarea-label textarea,:root .teacher-question-field textarea,:root .answer-tools-modal input:not([type=checkbox]),:root .answer-find-row>input,:root .link-popover input{box-sizing:border-box;border:1px solid var(--color-grey-20);background:var(--color-white);color:var(--color-grey-90);font-size:var(--font-text-sm);line-height:var(--line-text-sm);border-radius:10px;transition:border-color .18s,background-color .18s}:root .teacher-select-label select,:root .auth-role-select select,:root .answer-tools-modal input:not([type=checkbox]),:root .answer-find-row>input,:root .link-popover input{min-height:46px;padding:10px 15px}:root .teacher-textarea-label textarea,:root .teacher-question-field textarea{padding:12px 15px}:root .teacher-select-label select:hover:not(:disabled),:root .auth-role-select select:hover:not(:disabled),:root .teacher-textarea-label textarea:hover:not(:disabled),:root .teacher-question-field textarea:hover:not(:disabled),:root .answer-tools-modal input:not([type=checkbox]):hover:not(:disabled),:root .answer-find-row>input:hover:not(:disabled),:root .link-popover input:hover:not(:disabled){border-color:var(--color-grey-30)}:root .teacher-select-label select:focus,:root .auth-role-select select:focus,:root .teacher-textarea-label textarea:focus,:root .teacher-question-field textarea:focus,:root .answer-tools-modal input:not([type=checkbox]):focus,:root .answer-find-row>input:focus,:root .link-popover input:focus{border-color:var(--color-primary);outline:0}:root .teacher-select-label select:disabled,:root .auth-role-select select:disabled,:root .teacher-textarea-label textarea:disabled,:root .teacher-question-field textarea:disabled,:root .answer-tools-modal input:not([type=checkbox]):disabled{background:var(--color-grey-10);color:var(--color-grey-40);cursor:not-allowed}:root .text-input input::placeholder,:root .teacher-textarea-label textarea::placeholder,:root .teacher-question-field textarea::placeholder,:root .link-popover input::placeholder{color:var(--color-grey-40)}:root{--hover-neutral:#e5e5ea;--hover-primary-soft:#d5e9ff;--hover-danger-soft:#ffc8c6}:root .button--primary:not(:disabled):hover{background:var(--color-primary-dark)}:root .button--primary:not(:disabled):active{background:var(--color-primary-deep)}:root .button--danger:not(:disabled):hover{background:var(--color-danger-dark)}:root .button--danger:not(:disabled):active{background:var(--color-danger-deep)}:root .button--secondary:not(:disabled):hover{background:var(--hover-neutral)}:root .button--secondary:not(:disabled):active{background:var(--color-grey-20)}:root .button--white-primary:not(:disabled):hover{background:var(--hover-primary-soft);color:var(--color-primary)}:root .button--white-primary:not(:disabled):active{background:#c6e0ff}:root .button--white-danger:not(:disabled):hover{background:var(--hover-danger-soft);color:var(--color-danger)}:root .button--white-danger:not(:disabled):active{background:#ffbab8}:root .button--ghost:not(:disabled):hover,:root .landing-outline:hover{background:var(--color-primary-soft);border-color:var(--color-primary-dark);color:var(--color-primary-dark)}:root .button--ghost:not(:disabled):active{background:var(--hover-primary-soft)}:root .button--text:not(:disabled):hover{background:var(--color-primary-soft);color:var(--color-primary-dark)}:root .button--text:not(:disabled):active{background:var(--hover-primary-soft)}:root .button:not(:disabled):active{transform:scale(.98)}@media (prefers-reduced-motion:reduce){:root .button:not(:disabled):active{transform:none}}:root .evaluation-card-cta:hover{background:var(--color-primary-dark)}:root .evaluation-card-cta:active{background:var(--color-primary-deep)}:root .auth-form .auth-google-button:not(:disabled):hover{background:var(--color-grey-10);border-color:var(--color-grey-30)}.modal>p,.modal>form>p{color:var(--color-grey-90);font-size:var(--font-text-md);line-height:var(--line-text-md)}.modal>p+p{margin-top:10px}.notification-list{flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.notification-list>li+li{border-top:1px solid var(--color-grey-10)}.notification-item{width:100%;color:inherit;text-align:left;cursor:pointer;background:0 0;border-radius:12px;align-items:flex-start;gap:12px;padding:14px 12px;transition:background-color .15s;display:flex}.notification-item:hover{background:var(--color-grey-10)}.notification-item:focus-visible{outline:2px solid var(--color-primary);outline-offset:-2px}.notification-item-icon{flex-shrink:0;position:relative}.notification-item-icon .notification-dot{border:2px solid var(--color-white);background:var(--color-primary);border-radius:50%;width:10px;height:10px;position:absolute;top:-1px;right:-1px}.notification-item-text{flex-direction:column;flex:1;gap:4px;min-width:0;display:flex}.notification-item-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.notification-item-top strong{min-width:0;color:var(--color-grey-60);font-size:var(--font-text-sm);font-weight:var(--weight-medium);line-height:1.4}.notification-item-side{color:var(--color-grey-40);font-size:calc(13px + var(--font-bump));flex-shrink:0;align-items:center;gap:4px;line-height:18px;display:flex}.notification-item-body{color:var(--color-grey-50);font-size:var(--font-caption);line-height:var(--line-caption)}.notification-item:has(.notification-dot) .notification-item-top strong{color:var(--color-grey-90);font-weight:var(--weight-semibold)}.notification-kind{color:#a35f00;background:#fff1d6;border-radius:50%;place-items:center;width:36px;height:36px;display:grid}.notification-kind svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round}.notification-kind--submission{color:#1f7a3a;background:#e3f6e8}.notification-kind--evaluation{background:var(--color-primary-soft);color:var(--color-primary-dark)}.header-popover-badge{border:2px solid var(--color-white);background:var(--color-danger);min-width:18px;height:18px;color:var(--color-white);font-size:calc(11px + var(--font-bump));font-weight:var(--weight-semibold);text-align:center;pointer-events:none;border-radius:999px;padding:0 5px;line-height:14px;position:absolute;top:-2px;right:-8px}.settings-account{border-bottom:1px solid var(--color-grey-10);align-items:center;gap:12px;padding:4px 0 14px;display:flex}.settings-account .avatar,.settings-account-guest{width:44px;height:44px;font-size:calc(18px + var(--font-bump));font-weight:var(--weight-semibold);border-radius:50%;flex-shrink:0}.settings-account-guest{background:var(--color-grey-10);color:var(--color-grey-40);place-items:center;display:grid}.settings-account-guest svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round}.settings-account-text{flex-direction:column;flex:1;align-items:flex-start;gap:2px;min-width:0;display:flex}.settings-account-name{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.settings-account small{text-overflow:ellipsis;white-space:nowrap;max-width:100%;overflow:hidden}.settings-account small,.settings-row small{font-size:var(--font-caption);color:var(--color-grey-60)}.settings-account strong,.settings-row strong{font-size:var(--font-text-md);font-weight:var(--weight-semibold);color:var(--color-grey-90)}.settings-row{border-bottom:1px solid var(--color-grey-10);cursor:pointer;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;display:flex}.settings-row:last-of-type{border-bottom:0}.settings-row>span{flex-direction:column;gap:2px;display:flex}.switch{appearance:none;background:var(--color-grey-20);cursor:pointer;border-radius:12px;flex-shrink:0;width:40px;height:24px;margin:0;transition:background-color .18s;position:relative}.switch:after{content:"";background:var(--color-white);border-radius:50%;width:20px;height:20px;transition:transform .18s;position:absolute;top:2px;left:2px}.switch:checked{background:var(--color-primary)}.switch:checked:after{transform:translate(16px)}.switch:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.grading-workspace .segment-tabs,.compact-workspace .segment-tabs{border-radius:11px;gap:4px;margin-bottom:15px;padding:4px}.grading-workspace .segment-tabs button,.compact-workspace .segment-tabs button{font-size:calc(var(--font-test-lg) * 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