.learn-bento{grid-template-columns:repeat(12,minmax(0,1fr));align-items:stretch;gap:16px;display:grid}.bento-card{text-align:left;min-width:0;color:var(--lz-text);border-radius:22px;padding:24px}.bento-card h2{overflow-wrap:anywhere;margin:12px 0;font-size:22px;line-height:1.5}.bento-card p{color:var(--lz-text-2);margin:12px 0 0;font-size:14px;line-height:1.7}.bento-card .learn-section-label{color:var(--lz-text-2);font-size:14px}.bento-next{flex-direction:column;grid-area:span 2/span 8;align-items:flex-start;display:flex}.bento-next h2{max-width:95%;margin-top:30px;font-size:28px}.bento-next>.learn-primary{min-height:52px;margin-top:24px;padding-inline:28px}.bento-secondary{gap:4px;width:100%;margin-top:auto;padding-top:24px;display:grid}.bento-secondary button{text-align:left;background:#fff9;border:1px solid #ffffffd9;border-radius:14px;justify-content:space-between;align-items:center;gap:12px;min-height:64px;padding:12px;display:flex}.bento-secondary button:hover{background:#eef2ffe6}.bento-secondary strong,.bento-secondary small{display:block}.bento-secondary small{color:var(--lz-text-2);margin-bottom:4px;font-size:13px}.bento-goal,.bento-streak,.bento-review{grid-column:span 4}.bento-goal{align-items:center;gap:20px;display:flex}.bento-goal h2{margin:0;font-size:18px}.bento-goal p{margin-top:6px}.bento-mastery{grid-column:span 8}.bento-badges{grid-column:span 4}.bento-number{margin:12px 0;font-size:40px;font-weight:600;line-height:1.4;display:block}.bento-number small{color:var(--lz-text-2);margin-left:8px;font-size:14px;font-weight:400}.bento-streak .bento-number{color:#c2410c}.bento-ring{flex:0 0 108px;width:108px;height:108px;position:relative}.bento-ring svg{width:100%;height:100%;transform:rotate(-90deg)}.bento-ring circle{stroke:#e0e7ff;stroke-width:8px;fill:none}.bento-ring .bento-ring-value{stroke:var(--lz-primary-600);stroke-linecap:round;transition:stroke-dashoffset .6s ease-out}.bento-ring strong{justify-content:center;align-items:center;font-size:28px;display:flex;position:absolute;inset:0}.bento-ring small{color:var(--lz-text-2);margin:7px 0 0 3px;font-size:14px}.bento-expand-trigger{cursor:pointer}.bento-expand-trigger:hover{outline:1px solid #6366f166}.learn-today-label{color:var(--lz-text-2);font-size:13px}.learn-week-dots{justify-content:space-between;gap:8px;width:100%;margin-top:10px;display:flex}.learn-week-dots>span{justify-items:center;gap:5px;display:grid}.learn-week-dots i{color:#4b5563;background:#e5e7eb;border-radius:50%;place-items:center;width:26px;height:26px;font-size:11px;font-style:normal;display:grid}.learn-week-dots i.done{color:#fff;background:#c2410c}.learn-week-dots i.rest{background:0 0;border:1.5px dashed #6b7280}.learn-week-dots small{color:var(--lz-text-2);font-size:12px}.learn-bento-wake>.bento-card{animation:.3s cubic-bezier(.2,.8,.2,1) both bento-wake}.learn-bento-wake>.bento-card:nth-child(2){animation-delay:60ms}.learn-bento-wake>.bento-card:nth-child(3){animation-delay:.12s}.learn-bento-wake>.bento-card:nth-child(4){animation-delay:.18s}.learn-bento-wake>.bento-card:nth-child(5){animation-delay:.24s}.learn-bento-wake>.bento-card:nth-child(6){animation-delay:.3s}.learn-bento-wake .learn-bar{transform-origin:0;animation:.6s ease-out both bento-bar}@keyframes bento-wake{0%{opacity:0;transform:translateY(12px)scale(.98)}to{opacity:1;transform:none}}@keyframes bento-bar{0%{transform:scaleX(0)}to{transform:scaleX(1)}}.bento-backdrop{z-index:80;background:#1f293740;place-items:center;padding:32px;display:grid;position:fixed;inset:0}.bento-expanded{transform-origin:0 0;border-radius:28px;outline:none;width:min(720px,100%);max-height:calc(100dvh - 64px);padding:28px;overflow-y:auto}.bento-expanded>header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.bento-expanded h2{margin:0}.bento-expanded>p{color:var(--lz-text-2);margin-bottom:20px}.bento-expanded .learn-chapter-progress-row{grid-template-columns:28px 1fr minmax(100px,1fr) 40px 16px}.learn-review-groups{margin:0 0 24px;padding:0;list-style:none}.learn-review-groups li{border-bottom:1px solid var(--lz-border);justify-content:space-between;align-items:center;padding:16px 0;display:flex}.bento-expanded .learn-review-groups li:nth-child(-n+15){animation:.24s ease-out both bento-detail}@keyframes bento-detail{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.learn-badge-grid{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:16px;display:grid}.learn-flip-badge{perspective:700px;background:0 0;border-radius:18px;min-width:0;height:136px;padding:0;position:relative}.learn-flip-badge-inner{height:100%;transform-style:preserve-3d;transition:transform .4s cubic-bezier(.2,.8,.2,1);display:block;position:relative}.learn-flip-badge-front,.learn-flip-badge-back{color:#166534;backface-visibility:hidden;text-align:center;background:#dcfce7d9;border:1px solid #bbf7d0;border-radius:18px;flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:12px;display:flex;position:absolute;inset:0}.learn-flip-badge-front>span{font-size:26px}.learn-flip-badge strong{overflow-wrap:anywhere;font-size:14px;line-height:1.5}.learn-flip-badge small{font-size:12px}.learn-flip-badge-back{background:#f0fdf4;transform:rotateY(180deg)}.learn-milestone{color:#9a3412;background:#fff7ed;border:1px solid #fed7aa;border-radius:22px;align-items:center;gap:16px;margin-bottom:20px;padding:20px;animation:.3s bento-wake;display:flex}.learn-milestone p{color:#7c2d12;margin:4px 0 0}.learn-milestone>.learn-icon-button{margin-left:auto}.learn-milestone-list{flex-wrap:wrap;gap:8px;display:flex}.learn-milestone-list>span{color:#4b5563;background:#e5e7eb;border-radius:999px;align-items:center;gap:4px;padding:8px 12px;display:flex}.learn-milestone-list>.reached{color:#9a3412;background:#ffedd5}.learn-break-reminder{z-index:70;max-width:min(520px,100% - 32px);box-shadow:var(--lz-shadow-2);background:#fff;border:1px solid #c7d2fe;border-radius:22px;flex-wrap:wrap;align-items:center;gap:12px;padding:20px;display:flex;position:fixed;bottom:24px;right:24px}.learn-break-reminder p{flex:80%;margin:0}.learn-notice{color:#92400e;background:#fffbeb;border-radius:12px;margin:0 0 16px;padding:12px 16px}.learn-weak-action{align-items:center;gap:8px;display:flex}.learn-weak-action>.learn-topic{flex:1;min-width:0}.learn-weak-action>.learn-ghost{flex:none}.learn-portal{color:var(--lz-text);font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,system-ui,sans-serif;font-size:16px;line-height:1.6}.learn-group-progress{color:var(--lz-text-2);align-items:center;gap:12px;margin:12px 0;font-size:14px;display:flex}.learn-group-progress .learn-bar{flex:1}.learn-correct-streak{color:#9a3412;background:#ffedd5;border-radius:999px;padding:4px 10px}.learn-practice-summary{width:min(760px,100%);margin:24px auto;padding:32px}.learn-practice-summary>.learn-icon-tile{margin-bottom:12px}.learn-summary-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:24px 0;display:grid}.learn-summary-metrics>div{background:#f8fafc;border-radius:14px;gap:4px;padding:16px;display:grid}.learn-summary-metrics strong{color:var(--lz-text);font-size:24px}.learn-summary-metrics span{color:var(--lz-text-2);font-size:13px}.learn-summary-changes{gap:12px;margin:20px 0;display:grid}.learn-summary-topic{color:#92400e;background:#fffbeb;border-radius:14px;align-items:center;gap:12px;padding:14px;display:flex}.learn-summary-topic.upgraded{color:#166534;background:#f0fdf4}.learn-summary-topic>div{flex:1;min-width:0}.learn-summary-topic p{margin:4px 0 0;font-size:13px}.learn-answer-success .learn-feedback-icon{animation:.2s ease-out learn-check-pop}.learn-answer-miss{animation:.15s linear learn-answer-shake}@keyframes learn-check-pop{0%{transform:scale(.6)}to{transform:scale(1)}}@keyframes learn-answer-shake{25%{transform:translate(-6px)}75%{transform:translate(6px)}}.learn-mastery-celebration{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:18px;margin:16px 0;padding:20px;animation:.3s learn-check-pop;position:relative;overflow:hidden}.learn-celebration-particles{pointer-events:none;position:absolute;inset:0}.learn-celebration-particles i{--dx:-70px;--dy:-25px;background:#16a34a;border-radius:2px;width:6px;height:6px;animation:.8s ease-out both learn-particle;position:absolute;top:50%;left:50%}.learn-celebration-particles i:nth-child(2){--dx:80px;--dy:20px;background:#4f46e5}.learn-celebration-particles i:nth-child(3){--dx:150px;--dy:-30px;background:#d97706}.learn-celebration-particles i:nth-child(4){--dx:-140px;--dy:28px}.learn-celebration-particles i:nth-child(5){--dx:10px;--dy:-38px;background:#4f46e5}@keyframes learn-particle{0%{opacity:1;transform:translate(0)scale(1)}to{opacity:0;transform:translate(var(--dx), var(--dy)) rotate(130deg) scale(.5)}}.learn-why-wrong{color:#4338ca;background:#eef2ff;border-radius:12px;align-items:center;gap:8px;min-height:48px;padding:8px 12px;display:inline-flex}.learn-topic-info-trigger{text-align:left;color:#4338ca;text-underline-offset:4px;min-height:44px;text-decoration:underline}.learn-report-trigger{margin-left:auto}.learn-report-sent{color:#166534;font-size:12px}.learn-figure-button{border:1px solid var(--lz-border);background:#fff;border-radius:14px;width:100%;padding:16px;display:block}.learn-figure-button>span:first-child{display:block}.learn-figure-caption{color:var(--lz-text-2);justify-content:center;align-items:center;gap:6px;margin-top:12px;font-size:13px;display:flex}.learn-figure-dialog{border-radius:28px;width:min(900px,100%);max-height:90dvh;padding:24px;overflow:auto}.learn-figure-full svg{width:100%;max-width:100%;height:auto;max-height:75dvh;display:block}.learn-choice-zoom-actions{flex-wrap:wrap;gap:8px;margin:8px 0;display:flex}.learn-choice-zoom{min-height:44px}.learn-report-dialog label{gap:8px;margin:16px 0;display:grid}.learn-report-dialog select,.learn-report-dialog textarea{width:100%;min-height:48px;font:inherit;background:#fff;border:1px solid #cbd5e1;border-radius:12px;padding:12px}.learn-review-intro{text-align:center;max-width:680px;margin:40px auto;padding:32px}.learn-review-intro h1{margin:16px 0}.learn-review-intro>.learn-primary{margin-top:24px}.learn-semester-chips,.learn-state-chips{flex-wrap:wrap;gap:8px;margin:12px 0;display:flex}.learn-semester-chips button,.learn-state-chips button{min-height:44px;color:var(--lz-text-2);background:#fffc;border:1px solid #d1d5db;border-radius:999px;padding:8px 14px}.learn-semester-chips button.active,.learn-state-chips button.active{color:#3730a3;background:#eef2ff;border-color:#818cf8}.learn-relations{grid-template-columns:minmax(0,1fr) 18px minmax(0,1.2fr) 18px minmax(0,1fr);align-items:center;gap:6px;margin:24px 0;display:grid}.learn-relation-column{gap:8px;min-width:0;display:grid}.learn-relation-column h3{color:var(--lz-text-2);align-items:center;gap:4px;margin:0 0 8px;font-size:13px;display:flex}.learn-relation-node{text-align:left;background:#fffffff0;border:1px solid #c7d2fe;border-radius:14px;justify-items:start;gap:6px;width:100%;min-height:72px;padding:10px;display:grid}.learn-relation-node.soft{border-style:dashed}.learn-relation-node strong{overflow-wrap:anywhere;font-size:13px}.learn-relation-node small{color:var(--lz-text-2);font-size:11px}.learn-relation-arrow{color:#818cf8;place-items:center;display:grid}.learn-relation-arrow svg{width:18px}.learn-relation-arrow svg+svg{display:none}.learn-relation-current{perspective:600px;min-width:0}.learn-relation-current.can-flip{cursor:pointer}.learn-relation-flipper{min-height:180px;transform-style:preserve-3d;transition:transform .4s;display:grid;position:relative}.learn-relation-front,.learn-relation-back{backface-visibility:hidden;background:#eef2ff;border:1px solid #a5b4fc;border-radius:18px;flex-direction:column;grid-area:1/1;justify-content:center;align-items:center;gap:10px;min-width:0;padding:16px 10px;display:flex}.learn-relation-front strong{text-align:center;overflow-wrap:anywhere;font-size:16px}.learn-relation-front>span:first-child,.learn-relation-front small{color:#4338ca;font-size:12px}.learn-relation-back{align-items:flex-start;font-size:12px;transform:rotateY(180deg)}.learn-relation-back ul{margin:0;padding:0;list-style:none}.learn-relation-back li{gap:4px;display:flex}.learn-prerequisite-warning{color:#92400e;background:#fffbeb;border:1px solid #fde68a;border-radius:12px;margin:16px 0;padding:12px;font-size:14px}.learn-mastery-criteria{gap:8px;padding:0;list-style:none;display:grid}.learn-mastery-criteria li{align-items:flex-start;gap:8px;display:flex}.learn-mastery-criteria li svg{flex-shrink:0;margin-top:4px}.learn-inferred-label{color:#475569;border:1.5px dashed #94a3b8;border-radius:999px;padding:2px 8px;font-size:12px;display:inline-flex}.learn-topic.inferred{border-style:dashed}.learn-diagnosis-verdict{color:#9a3412;background:#fff7ed;border:1px solid #fed7aa;border-radius:20px;justify-content:center;align-items:center;gap:12px;min-height:180px;padding:32px;font-size:24px;display:flex}.learn-diagnosis-verdict.ok{color:#166534;background:#f0fdf4;border-color:#bbf7d0}.learn-untested{border:1px solid var(--lz-border);border-radius:16px;margin:20px 0;padding:16px}.learn-untested summary{cursor:pointer;align-items:center;min-height:44px;display:flex}.learn-diagnosis-path{background:#eef2ff;border:1px solid #c7d2fe;border-radius:20px;margin:24px 0;padding:24px}.learn-diagnosis-path ol{gap:12px;margin:20px 0;padding:0;list-style:none;display:grid}.learn-diagnosis-path li{background:#fff;border-radius:12px;align-items:center;gap:12px;padding:12px;display:flex}.learn-diagnosis-path li.active{color:#3730a3;border:1px solid #818cf8}.learn-settings-layout{gap:20px;max-width:760px;display:grid}.learn-settings-form,.learn-settings-account{padding:24px}.learn-settings-fieldset{border:0;margin:0 0 24px;padding:0}.learn-settings-fieldset legend{margin-bottom:12px;font-weight:600}.learn-settings-fieldset p{color:var(--lz-text-2);font-size:14px}.learn-goal-options{flex-wrap:wrap;gap:12px;display:flex}.learn-goal-option{background:#fff;border:1px solid #cbd5e1;border-radius:14px;min-height:48px;padding:12px 20px}.learn-goal-option.active{color:#3730a3;background:#eef2ff;border-color:#818cf8}.learn-settings-link{width:100%;min-height:56px;color:var(--lz-text);text-align:left;border-bottom:1px solid var(--lz-border);justify-content:space-between;align-items:center;gap:12px;padding:12px 0;display:flex}.learn-settings-logout{color:#9a3412}.learn-settings-saved{color:#166534;padding:12px 0}.learn-settings-error{color:#9a3412;background:#fff7ed;border-radius:12px;padding:12px}.learn-calendar{margin:24px 0;padding:24px}.learn-calendar-heading{justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;display:flex}.learn-calendar-heading>div{align-items:center;gap:8px;display:flex}.learn-calendar-heading h2{margin:0}.learn-calendar-heading>span{color:var(--lz-text-2);font-size:13px}.learn-calendar-grid{gap:4px;display:flex}.learn-calendar-weekdays{flex-shrink:0;grid-template-rows:repeat(7,44px);gap:2px;width:24px;display:grid}.learn-calendar-weekdays>span{color:var(--lz-text-2);place-items:center;font-size:12px;display:grid}.learn-calendar-weeks{flex:1;grid-template-columns:repeat(12,minmax(0,1fr));gap:2px;min-width:0;display:grid}.learn-calendar-week{gap:2px;display:grid}.learn-calendar-day{background:0 0;border-radius:8px;place-items:center;min-width:0;min-height:44px;padding:2px;display:grid}.learn-calendar-day>span{aspect-ratio:1;background:var(--day-bg);border:1px solid #1118270f;border-radius:6px;width:min(100%,36px);display:block}.level-0{--day-bg:#e5e7eb}.level-1{--day-bg:#c7d2fe}.level-2{--day-bg:#818cf8}.level-3{--day-bg:#4f46e5}.level-4{--day-bg:#312e81}.learn-calendar-day:hover:not(:disabled),.learn-calendar-day.selected{outline-offset:-2px;outline:2px solid #6366f1}.learn-calendar-day:disabled{opacity:.25;cursor:default}.learn-calendar-footer{justify-content:space-between;align-items:center;gap:12px;margin-top:16px;display:flex}.learn-calendar-selection{color:var(--lz-text-2);margin:0;font-size:13px}.learn-calendar-legend{color:var(--lz-text-2);align-items:center;gap:4px;font-size:12px;display:flex}.learn-calendar-note{color:var(--lz-text-2);margin:12px 0 0;font-size:12px}@media (min-width:1024px) and (hover:hover) and (pointer:fine){.learn-flip-badge:hover .learn-flip-badge-inner{transform:rotateX(var(--tilt-x,0deg)) rotateY(var(--tilt-y,0deg))}.learn-flip-badge.flipped .learn-flip-badge-inner{transform:rotateY(180deg)}.learn-relation-current.can-flip:hover .learn-relation-flipper{transform:rotateX(var(--tilt-x,0deg)) rotateY(var(--tilt-y,0deg))}.learn-relation-current.flipped .learn-relation-flipper{transform:rotateY(180deg)}}@media (min-width:768px) and (max-width:1023px){.learn-bento{grid-template-columns:repeat(6,minmax(0,1fr))}.bento-next{grid-area:auto/span 6}.bento-goal,.bento-streak,.bento-review,.bento-mastery{grid-column:span 3}.bento-badges{grid-column:span 6}.bento-next h2{font-size:24px}}@media (max-width:1023px){.learn-calendar-grid{display:block}.learn-calendar-weekdays{grid-template-rows:24px;grid-template-columns:repeat(7,1fr);width:100%;margin-bottom:4px}.learn-calendar-weeks{grid-template-columns:1fr;display:grid}.learn-calendar-week{grid-template-columns:repeat(7,minmax(0,1fr))}.learn-calendar-day{min-height:44px}}@media (max-width:767px){.learn-bento{flex-direction:column;display:flex}.bento-card{padding:20px}.bento-next h2{margin-top:20px;font-size:24px}.bento-next>.learn-primary{justify-content:center;width:100%}.bento-number{font-size:32px}.bento-goal{gap:20px}.bento-backdrop{padding:0}.bento-expanded{width:100%;height:100dvh;max-height:100dvh;padding:calc(16px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));border-radius:0}.bento-expanded .learn-chapter-progress-row{grid-template-columns:28px 1fr 40px 16px;display:grid}.bento-expanded .learn-chapter-progress-track{grid-area:2/2/auto/-1;width:100%}.learn-today-label{display:none}.learn-break-reminder{right:16px;bottom:calc(80px + env(safe-area-inset-bottom))}.learn-calendar{padding:16px}.learn-calendar-heading,.learn-calendar-footer{flex-direction:column;align-items:flex-start}.learn-calendar-day>span{width:30px;height:30px}.learn-summary-metrics{gap:8px}.learn-summary-metrics>div{padding:12px}.learn-summary-metrics strong{font-size:20px}.learn-practice-summary{padding:20px}.learn-weak-action{gap:4px}.learn-weak-action>.learn-ghost{padding-inline:10px}.learn-relations{grid-template-columns:1fr;gap:12px}.learn-relation-column{grid-template-columns:repeat(2,minmax(0,1fr))}.learn-relation-column h3{grid-column:1/-1}.learn-relation-arrow svg:first-child{display:none}.learn-relation-arrow svg+svg{display:block}.learn-relation-flipper{min-height:120px}.learn-relation-back{display:none}.learn-relation-front{min-height:120px}.learn-settings-form,.learn-settings-account{padding:20px}.learn-figure-dialog{padding:16px}.learn-milestone{gap:10px;padding:16px}}@media (prefers-reduced-motion:reduce){.learn-shell *,.learn-portal *{scroll-behavior:auto!important;transition-duration:0s!important;animation:none!important}.learn-relation-flipper,.learn-flip-badge-inner{transform:none!important}.learn-celebration-particles{display:none}}.learn-bento-wake .bento-ring-value{animation:.6s ease-out bento-ring-grow}@keyframes bento-ring-grow{0%{stroke-dashoffset:283px}}.learn-session-header-progress{max-width:240px;color:var(--lz-text-2);text-align:center;flex-direction:column;flex:1;gap:4px;margin-inline:auto;font-size:13px;display:flex}.learn-session-header-progress progress{width:100%;height:6px;accent-color:var(--lz-primary-600)}.learn-group-progress progress{height:6px;accent-color:var(--lz-primary-600);flex:1}@media (max-width:767px){.learn-topic-detail{background:#fffffff2}.lz-tutor-open .learn-topic-detail{-webkit-backdrop-filter:none;backdrop-filter:none}.learn-session-mode .learn-topbar{display:none}.learn-session-mode .learn-main{padding-top:0}.learn-session-header{z-index:30;background:#f7f8fbf7;gap:12px;margin-bottom:16px;padding:8px 0;position:sticky;top:0}.learn-session-header .learn-back{white-space:nowrap;min-height:44px;padding-inline:0}.learn-session-header .learn-badge{display:none}.learn-session-header-progress{max-width:none}.learn-card.learn-topic-detail{-webkit-backdrop-filter:blur(14px)saturate(150%);backdrop-filter:blur(14px)saturate(150%);background:#ffffffeb}.lz-tutor-open .learn-card.learn-topic-detail{-webkit-backdrop-filter:none;backdrop-filter:none}}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.learn-card.learn-topic-detail{background:#fff}}@media (prefers-reduced-transparency:reduce){.learn-card.learn-topic-detail{-webkit-backdrop-filter:none;backdrop-filter:none;background:#fff}}.learn-foundation{color:var(--lz-text-2);background:#f8fafcf0;margin-block:16px}.learn-foundation>summary{cursor:pointer;min-height:44px;padding:12px;font-weight:600}.learn-topbar-actions{min-width:0}.learn-subject-segments{flex-shrink:1;max-width:min(45vw,540px);overflow-x:auto}.bento-expanded>header{animation:.18s ease-out both bento-detail}@media (min-width:1024px) and (hover:hover) and (pointer:fine){.learn-badge-flat-date{display:none}}@media (prefers-reduced-motion:reduce){.learn-badge-flat-date{display:block}}.learn-calendar-grid{--calendar-cell:clamp(14px, 4vw, 18px);gap:4px;display:flex}.learn-calendar-weekdays{grid-template-columns:1fr;grid-template-rows:repeat(7, var(--calendar-cell));gap:4px;width:20px;margin:0}.learn-calendar-weeks{flex:0 260px;grid-template-columns:repeat(12,minmax(0,1fr));gap:4px;display:grid}.learn-calendar-week{grid-template-columns:minmax(0,1fr);grid-template-rows:repeat(7, var(--calendar-cell));gap:4px;display:grid}.learn-calendar-day{appearance:none;width:100%;height:var(--calendar-cell);background:var(--day-bg);min-height:0;box-shadow:none;border:0;border-radius:3px;outline:none;padding:0}.learn-calendar-day>span{display:none}.learn-calendar-day:hover:not(:disabled),.learn-calendar-day.selected{filter:brightness(.92);outline:none}.learn-calendar-day:focus-visible{outline-offset:2px;outline:2px solid #6366f1}.learn-calendar .level-0{--day-bg:#eef2ff}.learn-calendar-legend i{background:var(--day-bg);border-radius:3px;width:14px;height:14px}.learn-session-header-progress progress{appearance:none;background:#e0e7ff;border:0;border-radius:6px;height:6px;display:block;overflow:hidden}.learn-session-header-progress progress::-webkit-progress-bar{background:#e0e7ff;border-radius:6px}.learn-session-header-progress progress::-webkit-progress-value{background:#4f46e5;border-radius:6px}.learn-session-header-progress progress::-moz-progress-bar{background:#4f46e5;border-radius:6px}.learn-question-type{align-items:center}.learn-question-type>span{white-space:nowrap;color:#4338ca;background:#eef2ff;border-radius:999px;align-items:center;height:24px;min-height:24px;padding:0 9px;font-size:12px;line-height:1;display:inline-flex}.learn-actions.learn-question-submit{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.learn-question-submit>.learn-primary{white-space:nowrap;grid-column:1/-1;width:100%;min-height:52px}.learn-question-submit>.learn-ghost{white-space:nowrap;width:100%;min-width:0;min-height:48px;padding:10px 8px}.learn-topic-layout:not(.has-detail){grid-template-columns:minmax(0,1fr)}.learn-volume-chip{color:#6366a0;white-space:nowrap;background:#eef2ff;border-radius:6px;align-items:center;margin-left:6px;padding:2px 7px;font-size:12px;font-weight:400;display:inline-flex}.learn-foundation{color:#64748b;background:#f8fafc}.learn-foundation .learn-chapter{background:#fff;border-color:#e2e8f0}.learn-foundation .learn-volume-chip{color:#64748b;background:#f1f5f9}.parent-foundation-tag{color:#64748b;background:#f1f5f9;border-radius:4px;padding:1px 4px;display:inline-block}
:root{--glass-bg:#ffffff7d;--glass-bg-strong:#ffffffa6;--glass-border:#ffffffc7;--glass-highlight:inset 0 1px 0 #fff, inset 1px 0 0 #ffffff80, inset 0 -1px 0 #6477b51f;--glass-shadow:var(--glass-highlight), 0 14px 40px #394b8520, 0 2px 6px #394b8508;--glass-blur:blur(24px) saturate(170%);--radius-card:26px;--radius-control:999px;--lz-glass-bg:var(--glass-bg);--lz-glass-bg-strong:var(--glass-bg-strong);--lz-glass-blur:var(--glass-blur);--lz-glass-border:1px solid var(--glass-border);--lz-glass-shadow:var(--glass-shadow);--lz-text-2:#46536b;--learn-muted:#46536b}.learn-shell.learn-app-shell,.learn-login.learn-login,.parent-app.parent-app{background:#e9edf8}.learn-shell.learn-app-shell:before,.learn-login.learn-login:before,.parent-app.parent-app:before{content:"";z-index:-1;pointer-events:none;filter:none;background:radial-gradient(at 8% 15%,#a79ce5a8,#0000 46%),radial-gradient(at 88% 35%,#75d4db99,#0000 43%),radial-gradient(at 35% 87%,#edb4d48c,#0000 44%),radial-gradient(at 65% 5%,#b6c9f2a3,#0000 40%);animation:26s ease-in-out infinite alternate glass-drift;display:block;position:fixed;inset:-8%}@keyframes glass-drift{to{transform:translate(2%,3%)scale(1.05)}}.glass,.glass-strong,.learn-shell .learn-card,.learn-shell .bento-card,.learn-shell .bento-expanded,.learn-shell .learn-sidebar,.learn-shell .learn-topbar,.learn-shell .learn-tabbar,.learn-shell .learn-dialog,.learn-shell .learn-account-popover,.learn-shell .learn-assistant-panel,.learn-login.learn-login .learn-login-card,.parent-app.parent-app .parent-card,.parent-app.parent-app .parent-dialog,.parent-app.parent-app .parent-topbar,.tutor-layer .tutor-panel{background:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow)}.glass,.glass-strong,.learn-shell .learn-card,.learn-shell .bento-card,.learn-shell .bento-expanded,.learn-shell .learn-dialog,.learn-login.learn-login .learn-login-card,.parent-app.parent-app .parent-card{border-radius:var(--radius-card)}.glass-strong,.learn-shell .learn-dialog,.learn-shell .learn-account-popover,.parent-app.parent-app .parent-dialog{background:var(--glass-bg-strong)}.learn-shell .learn-chapters{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-card);box-shadow:var(--glass-shadow);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);gap:10px;padding:12px}.learn-shell .learn-chapter,.learn-shell .learn-foundation .learn-chapter{-webkit-backdrop-filter:none;backdrop-filter:none;background:#ffffff30;border:1px solid #ffffff80;border-radius:18px;box-shadow:inset 0 1px #ffffff80}.learn-shell .learn-chapter:hover{background:#ffffff60}.learn-shell .learn-chapter summary{grid-template-columns:minmax(0,1fr) 18px;gap:10px 16px;padding:18px;display:grid}.learn-shell .learn-chapter summary>div{grid-column:1;width:100%}.learn-shell .learn-chapter summary>div>span:last-child{flex:1;min-width:0}.learn-shell .learn-chapter summary>.learn-bar{grid-area:2/1;width:100%;margin:0}.learn-shell .learn-chapter summary>svg{grid-area:1/2/3}.learn-shell .learn-chapter summary strong{overflow-wrap:break-word;font-size:16px;line-height:1.6}.learn-chapter-kicker{color:#535582;margin-bottom:4px;font-size:12px;display:block}.learn-shell .learn-foundation,.learn-shell .learn-card .learn-card,.learn-shell .learn-chapters .learn-card{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:#ffffff30}.glass-subtle,.glass-button,.glass-pill,.learn-shell .learn-search,.learn-shell .learn-filter,.learn-shell .learn-ghost,.learn-shell .learn-semester-chips button,.learn-shell .learn-state-chips button,.learn-shell .learn-choices>button,.learn-shell .learn-review-choice,.learn-login.learn-login .learn-login-form input,.parent-app.parent-app .parent-student-select,.parent-app.parent-app .parent-small-button,.tutor-layer .tutor-chips button,.tutor-layer .tutor-composer textarea{box-shadow:var(--glass-highlight);color:#26354e;background:#ffffff60;border:1px solid #ffffffb8}.glass-button,.glass-pill,.learn-shell .learn-primary,.learn-shell .learn-ghost,.learn-shell .learn-search,.learn-shell .learn-filter,.tutor-layer .tutor-chips button{border-radius:var(--radius-control)}.glass-button:hover,.learn-shell .learn-ghost:hover,.tutor-layer .tutor-chips button:hover{background:#ffffffa6}.learn-shell .learn-primary,.learn-login.learn-login .learn-login-submit,.glass-button.primary,.tutor-layer .tutor-composer form>button{color:#fff;border-radius:var(--radius-control);background:linear-gradient(155deg,#8177ed 0%,#5746d8 55%,#4435b5 100%);border:1px solid #ffffff65;box-shadow:inset 0 2px 1px #ffffff70,inset 0 -2px 4px #30218955,0 7px 18px #5746d830}.learn-shell .learn-primary:hover:not(:disabled),.learn-login.learn-login .learn-login-submit:hover{filter:brightness(1.08);background:linear-gradient(155deg,#8d83f4,#5746d8)}button:active:not(:disabled){transform:translateY(1px)}.learn-shell .learn-state-chips button.active,.learn-shell .learn-semester-chips button.active,.learn-shell .learn-grade-chip.active,.learn-shell .learn-goal-option.active,.learn-shell .learn-subject-segments button[aria-pressed=true],.learn-shell .learn-nav-link.active,.parent-app.parent-app .parent-segments button[aria-pressed=true]{color:#3f319f;background:linear-gradient(155deg,#fffd,#dbd5ff99);border-color:#ffffffd9;box-shadow:inset 0 2px 1px #fff,inset 0 -1px 3px #8876cf30,0 4px 12px #6657ab18}.tutor-layer .tutor-panel{background:linear-gradient(145deg,#f2ecffb3,#ddf6f699 55%,#f5e5f2a6);border-radius:28px 0 0 28px}.tutor-layer .tutor-message.tutor{box-shadow:var(--glass-highlight), 0 6px 20px #53699010;background:#ffffff94;border:1px solid #ffffffdf}.tutor-layer .tutor-message.student{box-shadow:var(--glass-highlight);color:#272449;background:linear-gradient(145deg,#e6ddffcc,#d4e6ff99);border-color:#ffffffbf}.tutor-layer .tutor-composer{background:#ffffff38;border-top-color:#ffffffa8}.tutor-layer .tutor-mobile-close{background:#ffffff40}.tutor-layer .tutor-level-label{color:#125c59;background:linear-gradient(145deg,#ffffffa8,#b8e9e180);box-shadow:inset 0 1px #fff}.learn-shell .learn-question,.learn-shell .learn-feedback,.parent-app.parent-app .parent-message{background:#ffffff80}.learn-shell :is(button,a,input,select,textarea,summary):focus-visible,.learn-login.learn-login :is(button,a,input):focus-visible,.parent-app.parent-app :is(button,a,select,summary):focus-visible{outline-offset:3px;outline:3px solid #5946c5}@media (max-width:767px){:root{--glass-blur:blur(18px) saturate(165%);--radius-card:22px}.learn-shell .learn-chapters{padding:8px}.learn-shell .learn-chapter summary{padding:14px 12px}.learn-shell .learn-chapter summary strong{font-size:15px}.tutor-layer .tutor-panel{border-radius:28px 28px 0 0}}@media (prefers-reduced-motion:reduce){.learn-shell.learn-app-shell:before,.learn-login.learn-login:before,.parent-app.parent-app:before{animation:none}}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){:root{--glass-bg:#ffffffe0;--glass-bg-strong:#fffffff0}.tutor-layer .tutor-panel{background:#f4f7fff0}}@media (prefers-reduced-transparency:reduce){:root{--glass-bg:#fff;--glass-bg-strong:#fff;--glass-blur:none}.learn-shell.learn-app-shell:before,.learn-login.learn-login:before,.parent-app.parent-app:before{display:none}.tutor-layer .tutor-panel{background:#f5f7ff}}.learn-shell .learn-navigation-links a.active,.learn-shell .sliding-highlight,.parent-app.parent-app .sliding-highlight{background:linear-gradient(150deg,#ffffffed,#e0d9ff99);box-shadow:inset 0 2px 1px #fff,inset 0 -1px 3px #8876cf30,0 4px 12px #6657ab18}.lz-tutor-open .learn-card.learn-topic-detail{-webkit-backdrop-filter:none;backdrop-filter:none}.learn-shell .learn-filter select{border-radius:var(--radius-control);box-shadow:var(--glass-highlight);background:0 0;border-color:#ffffffa8}.parent-app.parent-app .parent-weak-row small,.parent-app.parent-app .parent-summary-caption,.parent-app.parent-app .parent-section-title>span,.learn-shell .learn-browser-caption,.learn-shell .learn-chapter summary small{color:#46536b}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.glass-subtle,.glass-button,.glass-pill,.learn-shell .learn-search,.learn-shell .learn-filter,.learn-shell .learn-chapter,.tutor-layer .tutor-message.tutor{background:#ffffffe0}}.learn-shell .learn-question-submit{background:#ffffff40}.learn-shell .learn-choices>button.selected{background:linear-gradient(145deg,#e9e3ffdc,#cbdcffa6);border-color:#7563cf;box-shadow:inset 0 1px #fff,0 0 0 1px #7563cf}.learn-shell .learn-review-choice.correct{background:#dcf5e4c9;border-color:#4c9463}.learn-shell .learn-review-choice.wrong{background:#ffe5dfc9;border-color:#ba6552}.learn-shell .learn-topic{-webkit-backdrop-filter:none;backdrop-filter:none;background:#ffffff38;border-bottom-color:#ffffff70}.learn-shell .learn-topic:hover{background:#ffffff80}.learn-shell .learn-topic-selected .learn-topic{background:linear-gradient(145deg,#ede7ffcc,#dbeaff99);border-color:#9384d3}.learn-shell .learn-semester-chips{flex-wrap:wrap;overflow:visible}.learn-shell .learn-semester-chips button{border-radius:16px;flex-direction:column;align-items:flex-start;gap:4px;min-height:48px;padding:12px 16px;display:flex}.learn-semester-chips strong{font-size:14px}.learn-semester-chips small{font-size:11px;font-weight:400}.learn-volume-help{color:var(--lz-text-2);max-width:640px;margin:12px 0 18px;font-size:13px}.learn-volume-help summary{cursor:pointer;min-height:36px;padding:8px 0}.learn-volume-help p{margin:4px 0;line-height:1.8}.learn-chapter-select{width:260px;max-width:100%;position:relative}.learn-chapter-select button{border:1px solid var(--glass-border);background:var(--glass-bg);color:inherit;text-align:left;cursor:pointer;border-radius:18px;justify-content:space-between;align-items:center;gap:10px;width:100%;min-height:46px;padding:12px 16px;display:flex}.learn-chapter-select button:focus-visible{outline-offset:2px;outline:2px solid #6254c7}.learn-chapter-options{z-index:30;background:var(--glass-bg-strong);width:min(360px,85vw);max-height:320px;-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:20px;padding:6px;position:absolute;top:calc(100% + 8px);right:0;overflow-y:auto}.learn-chapter-options button{background:0 0;border-color:#0000;border-radius:12px}.learn-chapter-options button[aria-selected=true],.learn-chapter-options button:hover{background:#ffffffa0}.learn-parent-entry{white-space:nowrap;background:var(--glass-bg-strong);border:1px solid var(--glass-border);border-radius:999px;padding:10px 14px;font-size:13px;font-weight:650}@media (max-width:600px){.learn-shell .learn-semester-chips{flex-wrap:nowrap;gap:8px;padding-bottom:8px;display:flex;overflow-x:auto}.learn-shell .learn-semester-chips button{white-space:nowrap;flex:none;min-width:128px}.learn-shell .learn-semester-chips button:first-child{min-width:64px}.learn-chapter-select,.learn-chapter-options{width:100%}}.learn-shell .learn-topic-toolbar{grid-template-columns:minmax(0,1fr) 260px}@media (max-width:700px){.learn-shell .learn-topic-toolbar{grid-template-columns:minmax(0,1fr)}.learn-shell .learn-topic-toolbar .learn-chapter-select{grid-column:1/-1;width:100%}}
