/* A separate, warm and quiet learning surface. No quiz selectors here. */
.pr-shell{--pr-ink:#253e51;--pr-muted:#5a6a76;--pr-line:#dce1e2;--pr-blue:#365f7b;--pr-sky:#e6eef3;--pr-paper:#fffefa;--pr-peach:#f3ddcc;min-height:100vh;background:#f6f3ed;color:var(--pr-ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;letter-spacing:0}
.pr-shell *{box-sizing:border-box}.pr-shell [hidden]{display:none!important}.pr-shell button,.pr-shell input,.pr-shell select{font:inherit}.pr-shell button{cursor:pointer}.pr-shell button:disabled{cursor:default}.pr-shell p{margin:0 0 16px}.pr-shell h1,.pr-shell h2,.pr-shell h3{color:var(--pr-ink);line-height:1.22;letter-spacing:-.025em;margin:0 0 16px}.pr-shell h2{font-size:25px;font-weight:600}.pr-shell h3{font-size:18px;font-weight:600}.pr-shell a{color:#305877;text-underline-offset:4px}.pr-shell small,.pr-shell .pr-small{font-size:13px;color:var(--pr-muted);line-height:1.55}.pr-shell fieldset{min-width:0;border:0;margin:0;padding:0}.pr-shell legend{padding:0}.pr-shell :focus-visible{outline:3px solid #547ca3;outline-offset:4px}.pr-shell em{font-weight:400;color:#5c7790}
.pr-shell .pr-topbar{max-width:1280px;margin:auto;padding:25px 44px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--pr-line)}.pr-shell .pr-brand{display:flex;align-items:center;gap:12px;text-align:left;border:0;background:transparent;color:var(--pr-ink);padding:0}.pr-shell .pr-brand-symbol{display:grid;place-items:center;border-radius:13px;background:var(--pr-blue);color:white;width:40px;height:40px;font:italic 29px Georgia,serif}.pr-shell .pr-brand strong{display:block;font-size:16px;font-weight:600}.pr-shell .pr-brand small{display:block;font-size:9px;letter-spacing:.14em;margin-top:2px}.pr-shell .pr-topnav{display:flex;gap:24px;align-items:center;flex-wrap:wrap}.pr-shell .pr-topnav button{border:0;background:transparent;color:var(--pr-muted);font-size:13px;min-height:40px}.pr-shell .pr-topnav .pr-candidate{display:flex;align-items:center;gap:9px}.pr-shell .pr-avatar{display:grid;place-items:center;width:29px;height:29px;border-radius:50%;background:#e3e9ee;color:var(--pr-ink);font-size:12px}
.pr-shell .pr-main{max-width:1200px;margin:0 auto;padding:0 44px 45px;outline:none}.pr-shell .pr-main:has(.pr-activity),.pr-shell .pr-main:has(.pr-pause),.pr-shell .pr-main:has(.pr-reviews){max-width:990px}.pr-shell .pr-hero{padding:62px 0 46px;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(250px,.8fr);align-items:center;gap:50px}.pr-shell .pr-kicker{font-size:10px;font-weight:650;letter-spacing:.13em;color:#5a6e7a;margin-bottom:15px}.pr-shell .pr-hero h1,.pr-shell .pr-result-head h1,.pr-shell .pr-pause h1{font:400 clamp(43px,5.7vw,69px)/1.08 Georgia,'Times New Roman',serif;letter-spacing:-.045em;margin-bottom:24px}.pr-shell .pr-lead{font-size:17px;color:var(--pr-muted);line-height:1.8}.pr-shell .pr-hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:15px;margin-top:27px}.pr-shell .pr-hero-note{background:var(--pr-peach);border-radius:80px 28px 28px 28px;padding:37px 34px 30px;transform:rotate(2deg);max-width:350px;justify-self:end;width:100%}.pr-shell .pr-note-number{font-size:13px;color:#775d4d;border-bottom:1px solid #d6bda9;padding-bottom:10px;display:block;margin-bottom:21px}.pr-shell .pr-hero-note p{font:400 31px/1.3 Georgia,serif;color:#584437;letter-spacing:-.025em}.pr-shell .pr-hero-note strong{font-weight:400;font-style:italic}.pr-shell .pr-hero-note>span:last-child{display:block;font-size:11px;color:#705949;line-height:1.7;margin-top:20px}
.pr-shell .pr-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 18px;border:1px solid #c7d2d9;border-radius:13px;background:var(--pr-paper);color:var(--pr-ink);font-size:13px;font-weight:600;line-height:1.4;text-decoration:none;text-align:center;transition:background .16s,border-color .16s}.pr-shell .pr-button:hover:not(:disabled){background:#edf2f5;border-color:#9caebb}.pr-shell .pr-button.pr-primary{background:var(--pr-blue);border-color:var(--pr-blue);color:white;padding:13px 23px}.pr-shell .pr-button.pr-primary:hover:not(:disabled){background:#294e68}.pr-shell .pr-button.pr-text{background:transparent;border-color:transparent;color:var(--pr-muted);padding:9px 5px}.pr-shell .pr-button.pr-finish{color:#553f30;background:#f1d8c4;border-color:#dbbba1;white-space:nowrap}.pr-shell .pr-button.pr-finish:hover{background:#e9c9af}.pr-shell .pr-button:disabled{opacity:.5}.pr-shell .pr-button.is-selected{color:#294e68;background:#e6eef3;border-color:#7894a7}.pr-shell .pr-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.pr-shell .pr-resume{background:#e8eef1;display:flex;align-items:center;justify-content:space-between;gap:22px;border-radius:19px;padding:23px 27px;margin:0 0 28px}.pr-shell .pr-resume h2{font-size:23px;margin:5px 0}.pr-shell .pr-resume p{font-size:13px;margin:0}.pr-shell .pr-home-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:38px;align-items:start}.pr-shell .pr-setup{border:1px solid #dedfdc;border-radius:23px;background:var(--pr-paper);padding:30px;box-shadow:0 9px 24px #344a5d08}.pr-shell .pr-section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 25px}.pr-shell .pr-section-heading h2{margin:0}.pr-shell .pr-section-heading .pr-kicker{margin-bottom:8px}.pr-shell .pr-config{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:21px}.pr-shell .pr-config>.pr-field:only-child{grid-column:1/-1}.pr-shell .pr-field{display:flex;flex-direction:column;gap:7px;min-width:0}.pr-shell .pr-field>span{font-size:12px;font-weight:600;color:#4b6171}.pr-shell .pr-field input,.pr-shell .pr-field select{width:100%;min-width:0;min-height:47px;background:#f8f8f5;color:var(--pr-ink);border:1px solid #ccd7dc;border-radius:10px;padding:11px 12px;font-size:14px;text-overflow:ellipsis}.pr-shell .pr-feedback-mode{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:23px}.pr-shell .pr-feedback-mode legend{font-size:12px;font-weight:600;margin-bottom:9px}.pr-shell .pr-feedback-mode .pr-button{font-size:12px;flex:1;min-width:125px;padding:10px}.pr-shell .pr-timer-settings{border-top:1px solid var(--pr-line);padding-top:15px;color:var(--pr-muted);font-size:13px}.pr-shell summary{cursor:pointer}.pr-shell .pr-timer-settings summary{margin-bottom:15px}.pr-shell .pr-timer-settings .pr-config{margin-top:14px}.pr-shell .pr-start{margin-top:23px;border-top:1px solid var(--pr-line);padding-top:20px;display:flex;align-items:center;justify-content:space-between;gap:15px}.pr-shell .pr-start p{margin:0;color:var(--pr-muted);font-size:12px;max-width:175px}.pr-shell .pr-chapter-checks{display:grid;grid-template-columns:1fr;gap:8px;margin:0 0 20px;max-height:300px;overflow:auto}.pr-shell .pr-chapter-checks legend{font-size:12px;font-weight:600;margin-bottom:10px}.pr-shell .pr-chapter-checks label{display:flex;align-items:flex-start;gap:9px;font-size:13px;padding:4px 0}.pr-shell .pr-chapter-checks input{margin-top:5px;accent-color:var(--pr-blue)}
.pr-shell .pr-formats{padding:14px 0}.pr-shell .pr-formats h2{font:400 28px/1.25 Georgia,serif;margin-bottom:23px}.pr-shell .pr-method-list{display:grid;gap:11px;margin-bottom:20px}.pr-shell .pr-method{display:flex;align-items:center;gap:14px;width:100%;padding:14px 16px;text-align:left;background:transparent;border:1px solid #dedfdc;border-radius:15px;color:var(--pr-ink);transition:background .15s}.pr-shell .pr-method:hover,.pr-shell .pr-method.is-selected{background:#fffefa;border-color:#9caebb}.pr-shell .pr-method-mark{font:22px Georgia,serif;display:grid;place-items:center;width:44px;height:44px;flex-shrink:0;background:#e6edf1;border-radius:12px;color:#415f78}.pr-shell .pr-method:nth-child(2n) .pr-method-mark{background:#f0e0d4;color:#745a48}.pr-shell .pr-method:nth-child(3n) .pr-method-mark{background:#e8e5ee;color:#675d78}.pr-shell .pr-method:nth-child(4) .pr-method-mark{font-size:12px}.pr-shell .pr-method strong{display:block;font-size:14px;font-weight:600;margin-bottom:3px}.pr-shell .pr-method small{display:block;font-size:12px;line-height:1.5}.pr-shell .pr-library{margin-top:55px}.pr-shell .pr-chapters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.pr-shell .pr-chapter{position:relative;text-align:left;min-width:0;display:flex;flex-direction:column;border:1px solid #dfe1de;border-radius:17px;background:#fffefa;padding:21px 22px;color:var(--pr-ink);overflow:hidden;transition:background .15s,border-color .15s}.pr-shell .pr-chapter:hover{background:#edf2f5;border-color:#abc0cf}.pr-shell .pr-chapter-number{font:20px Georgia,serif;color:#657b8d;margin-bottom:15px}.pr-shell .pr-chapter strong{font-size:14px;line-height:1.55;font-weight:600;margin-bottom:20px;flex:1}.pr-shell .pr-chapter-footer{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:var(--pr-muted)}.pr-shell .pr-chapter-bar{display:block;height:3px;background:#e5ebee;position:absolute;left:0;right:0;bottom:0}.pr-shell .pr-chapter-bar>span{display:block;height:100%;background:#839fb2}
.pr-shell .pr-session-toolbar{position:sticky;top:0;z-index:3;display:flex;justify-content:space-between;align-items:center;gap:14px;padding:17px 0;background:#f6f3edee;backdrop-filter:blur(10px);border-bottom:1px solid var(--pr-line);margin-top:12px}.pr-shell .pr-session-toolbar>div:first-child{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.pr-shell .pr-session-count{font-size:12px;color:var(--pr-muted)}.pr-shell .pr-clock{font-size:13px;font-variant-numeric:tabular-nums;color:#5e7180}.pr-shell .pr-progress{height:3px;background:#e1e5e6;margin:0 0 31px;border-radius:3px;overflow:hidden}.pr-shell .pr-progress>span{display:block;height:100%;background:#8aa9bd;transition:width .2s}.pr-shell .pr-activity{background:var(--pr-paper);border:1px solid #e0e2df;border-radius:24px;padding:35px 42px;box-shadow:0 10px 30px #344a5d06}.pr-shell .pr-activity-head{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:11px;color:var(--pr-muted);margin-bottom:24px}.pr-shell .pr-type-pill{color:#385b74;background:#e8eff3;padding:6px 11px;border-radius:9px}.pr-shell .pr-activity h1{font:400 clamp(29px,4vw,38px)/1.2 Georgia,serif;letter-spacing:-.025em;margin-bottom:14px}.pr-shell .pr-instruction{color:var(--pr-muted);font-size:14px;line-height:1.7;max-width:690px;margin-bottom:24px}.pr-shell .pr-period{font-size:12px;line-height:1.65;color:#635b52;border-left:2px solid #d4b79e;padding:8px 14px;margin-bottom:22px}.pr-shell .pr-note-to-fix{border:1px solid #ead6c4;background:#fbf1e7;border-radius:13px;padding:22px 24px;margin:24px 0}.pr-shell .pr-note-to-fix>span{font-size:9px;letter-spacing:.12em;color:#795f4c;display:block;margin-bottom:11px}.pr-shell .pr-note-to-fix p{font:400 21px/1.6 Georgia,serif;color:#604c3e;margin:0}.pr-shell .pr-reading{border-left:3px solid #aec4d4;padding:17px 23px;margin:24px 0;background:#f0f5f7;border-radius:0 12px 12px 0}.pr-shell .pr-reading>span{font-size:11px;color:#546d80}.pr-shell .pr-reading blockquote{font:400 21px/1.6 Georgia,serif;margin:12px 0 0;color:#34536b}.pr-shell .pr-part{margin:24px 0}.pr-shell .pr-part>.pr-kicker{display:block;margin-bottom:12px}.pr-shell .pr-changed{padding-top:25px;border-top:1px dashed #bbcbd6}.pr-shell .pr-options legend{font-size:17px;font-weight:500;line-height:1.7;color:#263f51;margin-bottom:17px;width:100%}.pr-shell .pr-option{display:flex;align-items:flex-start;gap:13px;text-align:left;width:100%;padding:16px 18px;margin-bottom:11px;border:1px solid #d7dfe1;border-radius:12px;background:#fffefa;color:#334e60;font-size:15px;line-height:1.65;transition:border-color .15s,background .15s}.pr-shell .pr-option:hover:not(:disabled){background:#f1f6f8;border-color:#9ab3c5}.pr-shell .pr-option.is-selected{background:#e9f0f5;border-color:#7595ac;box-shadow:inset 3px 0 #7595ac}.pr-shell .pr-option:disabled{opacity:1;color:#506675}.pr-shell .pr-option.is-selected:disabled{color:#294d65}.pr-shell .pr-option-mark{display:grid;place-items:center;flex-shrink:0;margin-top:2px;width:26px;height:26px;border:1px solid #d9e0e3;border-radius:8px;font-size:11px;color:#637b8b;background:#f8fafb}.pr-shell .pr-option.is-selected .pr-option-mark{background:var(--pr-blue);border-color:var(--pr-blue);color:white}.pr-shell .pr-commit{display:flex;align-items:center;gap:19px;flex-wrap:wrap;margin-top:25px}.pr-shell .pr-commit>span{font-size:12px;color:var(--pr-muted);max-width:290px}.pr-shell .pr-activity-tools{margin-top:23px;padding-top:10px;border-top:1px solid #edf0ee;font-size:12px}.pr-shell .pr-activity-tools .pr-button{font-size:12px}.pr-shell .pr-step-nav{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:25px}.pr-shell .pr-session-footnote{font-size:11px;color:var(--pr-muted);text-align:center;margin:20px 0}.pr-shell .pr-pause{padding:65px 25px 70px;text-align:center}.pr-shell .pr-pause p:not(.pr-kicker){color:var(--pr-muted)}
.pr-shell .pr-feedback{background:#edf3f6;border:1px solid #dbe6ec;border-radius:15px;padding:25px 27px;margin-top:28px}.pr-shell .pr-feedback-heading{margin-bottom:22px}.pr-shell .pr-feedback-heading .pr-kicker{display:block;margin-bottom:9px;color:#516f83}.pr-shell .pr-feedback-heading>strong{font:400 23px Georgia,serif}.pr-shell .pr-feedback-part{font-size:14px;line-height:1.8}.pr-shell .pr-feedback-part+.pr-feedback-part{border-top:1px solid #d4e0e7;padding-top:18px;margin-top:18px}.pr-shell .pr-feedback-part p:last-child{margin-bottom:0}.pr-shell .pr-source{font-size:12px;color:#526c7d;border-top:1px solid #cfdee7;padding-top:16px;margin-top:20px}.pr-shell .pr-source summary{font-weight:600;margin-bottom:10px}.pr-shell .pr-source a{display:inline-block;margin:0 17px 6px 0}.pr-shell .pr-response-saved{background:#edf3f6;border-radius:10px;padding:15px 19px;font-size:13px;color:#4e6e83;margin-top:24px}.pr-shell .pr-result-head{padding:57px 0 25px}.pr-shell .pr-result-head p:not(.pr-kicker){color:var(--pr-muted);font-size:14px}.pr-shell .pr-result-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin:9px 0 27px}.pr-shell .pr-result-metrics>div{background:#fffefa;padding:22px 24px;border:1px solid var(--pr-line);border-radius:16px}.pr-shell .pr-result-metrics strong{font:400 35px Georgia,serif;display:block;margin-bottom:6px}.pr-shell .pr-result-metrics strong small{font:400 19px Georgia,serif}.pr-shell .pr-result-metrics span{font-size:11px;color:var(--pr-muted);display:block}.pr-shell .pr-result-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}.pr-shell .pr-reviews{margin-top:30px}.pr-shell .pr-review{border:1px solid var(--pr-line);border-radius:16px;background:#fffefa;margin:16px 0;overflow:hidden}.pr-shell .pr-review>summary{padding:20px 23px;display:flex;align-items:center;justify-content:space-between;gap:20px;list-style:none}.pr-shell .pr-review>summary::-webkit-details-marker{display:none}.pr-shell .pr-review>summary:after{content:'+';font-size:23px;color:#638399;flex-shrink:0}.pr-shell .pr-review[open]>summary:after{content:'−'}.pr-shell .pr-review>summary>span:first-child{flex:1}.pr-shell .pr-review>summary strong{display:block;font-size:16px;line-height:1.4}.pr-shell .pr-review>summary small{display:block;font-size:10px;margin-bottom:6px}.pr-shell .pr-review>summary>span:last-of-type{font-size:11px;color:#567084}.pr-shell .pr-review-body{padding:0 25px 27px;border-top:1px solid #edf0ee}.pr-shell .pr-your-answer{margin-top:22px}.pr-shell .pr-your-answer h3{font-size:15px;line-height:1.65}.pr-shell .pr-your-answer p{font-size:13px;color:var(--pr-muted)}.pr-shell .pr-your-answer p>span{font-weight:600}.pr-shell .pr-history-section{background:#fffefa;border:1px solid var(--pr-line);border-radius:17px;padding:26px;margin:26px 0}.pr-shell .pr-history-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid #e8ecec}.pr-shell .pr-history-row:last-child{border-bottom:0}.pr-shell .pr-history-row strong{display:block;font-size:14px}.pr-shell .pr-history-row small{display:block;margin-top:5px;font-size:12px}.pr-shell .pr-archive-item{padding:24px 0;border-bottom:1px solid var(--pr-line);font-size:14px}.pr-shell .pr-archive-item:last-child{border-bottom:0}.pr-shell .pr-notice{background:#f5e7d9;border:1px solid #e3ccb7;color:#6b503c;border-radius:13px;padding:17px 22px;font-size:13px;margin:22px 0}.pr-shell .pr-shell-footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid var(--pr-line);margin-top:58px;padding-top:23px;font-size:10px;color:#687c87}
@media(max-width:950px){.pr-shell .pr-home-grid{gap:23px;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr)}.pr-shell .pr-setup{padding:24px}.pr-shell .pr-main{padding-left:28px;padding-right:28px}.pr-shell .pr-topbar{padding-left:28px;padding-right:28px}.pr-shell .pr-hero{gap:30px}.pr-shell .pr-start{align-items:stretch;flex-direction:column}.pr-shell .pr-start p{max-width:none}.pr-shell .pr-activity{padding:30px}.pr-shell .pr-chapters{grid-template-columns:repeat(2,minmax(0,1fr))}}
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@media(max-width:370px){.pr-shell .pr-config{grid-template-columns:1fr}.pr-shell .pr-chapters{grid-template-columns:1fr}.pr-shell .pr-topnav{flex-basis:100%}.pr-shell .pr-hero-note>span:last-child{max-width:100px}.pr-shell .pr-result-metrics{grid-template-columns:1fr}.pr-shell .pr-result-metrics>div{display:flex;gap:15px;align-items:center}.pr-shell .pr-result-metrics strong{margin:0}.pr-shell .pr-step-nav{gap:8px}}
@media(prefers-reduced-motion:reduce){.pr-shell *{transition:none!important;scroll-behavior:auto!important}.pr-shell .pr-hero-note{transform:none}}
@media print{.pr-shell{background:white}.pr-shell .pr-topbar,.pr-shell .pr-result-actions,.pr-shell .pr-session-toolbar,.pr-shell .pr-shell-footer{display:none}.pr-shell .pr-main{max-width:none;padding:0}.pr-shell .pr-review{break-inside:avoid}.pr-shell .pr-review>.pr-review-body{display:block!important}}