:root{--button-depth:4px;--paper:#f8f7f2;--white:#fffefa;--ink:#233d4a;--muted:#526570;--blue:#226888;--blue-dark:#17536f;--blue-pale:#eaf2f4;--line:#d9dedb;--green:#25604a;--green-pale:#edf5ee;--red:#a03232;--red-pale:#fbefec;--yellow:#f0c96e;color:var(--ink);background:var(--paper);font-synthesis:none;font-family:-apple-system,BlinkMacSystemFont,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif;font-size:16px;line-height:1.75}*{box-sizing:border-box}body,h1,h2,h3,p{margin:0}h1{text-wrap:balance;line-break:strict;letter-spacing:.015em;font-size:36px;font-weight:750;line-height:1.45}h2{font-size:22px;font-weight:700;line-height:1.5}h3{font-size:19px;line-height:1.6}a{color:inherit;text-underline-offset:5px;text-decoration-thickness:1px}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button,a{transition:background .15s,color .15s}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:4px}img,svg{vertical-align:middle;max-width:100%}input[type=checkbox],input[type=radio]{accent-color:var(--blue);flex-shrink:0;width:20px;height:20px;margin:0}input:not([type=radio]):not([type=checkbox]),select{background:var(--white);min-height:48px;color:var(--ink);border:1px solid #82959d;border-radius:7px;max-width:100%;padding:10px 14px}select{min-width:160px}fieldset{border:0;margin:0;padding:0}legend{margin-bottom:14px;font-weight:700}details summary{cursor:pointer;min-height:44px;padding:8px 0;display:list-item}ol,ul{padding-left:1.5em}li+li{margin-top:8px}.site-header{background:var(--white);border-bottom:1px solid var(--line)}.header-inner{align-items:center;gap:48px;max-width:1160px;min-height:88px;margin:auto;padding:0 30px;display:flex}.brand{letter-spacing:-.9px;align-items:center;gap:9px;font-size:27px;font-weight:800;line-height:1;text-decoration:none;display:flex}.brand-dot{color:#d5a84b;margin-left:-9px}.header-inner nav{align-self:stretch;align-items:stretch;gap:36px;margin-left:auto;display:flex}.header-inner nav a{border-bottom:3px solid #0000;justify-content:center;align-items:center;min-width:45px;padding-top:3px;font-weight:650;text-decoration:none;display:flex}.header-inner nav a.active{border-color:var(--blue);color:var(--blue)}@font-face{font-family:Google Sans;font-weight:500;font-style:normal;font-display:swap;src:url(/fonts/google-sans-medium.ttf)format("truetype")}.account-link{border:2px solid var(--blue-dark);background:var(--white);min-height:48px;color:var(--blue);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;gap:10px;padding:10px 12px;font-size:16px;font-weight:650;text-decoration:none;display:flex}.google-login-button{color:#1f1f1f;white-space:nowrap;min-height:48px;box-shadow:0 3px 0 var(--line);background:#fff;border:1px solid #747775;border-radius:12px;justify-content:center;align-items:center;gap:10px;padding:10px 12px;font-family:Google Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif;font-size:16px;font-weight:500;line-height:1.4;display:inline-flex}.account-link img,.account-link svg,.google-login-button img{flex-shrink:0}.site-footer nav a,.site-footer #analytics-settings{align-items:center;gap:8px;display:inline-flex}.site-footer nav svg{flex-shrink:0}.settings-section .button{justify-content:center;align-items:center;gap:10px;display:inline-flex}.settings-section .button svg{flex-shrink:0}.development-status{color:#645020;text-align:center;background:#f3ebd6;padding:6px 20px;font-size:16px}.main-content{max-width:780px;min-height:65vh;margin:0 auto;padding:48px 30px 80px}.main-content.wide{max-width:1060px}.home-heading,.page-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:30px;display:flex}.home-heading{margin-bottom:28px}.content-meta{color:var(--muted);font-size:16px}.section-heading{justify-content:space-between;align-items:center;gap:15px;margin:36px 0 22px;display:flex}.section-heading a{color:var(--blue);align-items:center;gap:12px;min-height:44px;font-size:16px;text-decoration:none;display:flex}.search-form{background:var(--white);border:1px solid #9eafb5;border-radius:10px;align-items:center;gap:12px;margin:24px 0;padding:4px 8px;display:flex}.search-form input:not([type=checkbox]){background:0 0;border:0;flex:1;min-width:0;min-height:54px;padding:12px 6px;font-size:18px}.search-form svg{width:23px;height:23px;color:var(--muted);flex-shrink:0;margin-left:13px}.search-submit{background:var(--blue-pale);color:var(--blue);border:0;border-radius:7px;width:48px;height:48px;font-size:23px}.home-search{margin-bottom:38px}.button{background:var(--blue);border:1px solid var(--blue);color:#fffefa;border-radius:7px;justify-content:center;align-items:center;gap:22px;max-width:100%;min-height:48px;padding:11px 22px;font-weight:650;line-height:1.5;text-decoration:none;display:inline-flex}.button:hover:not(:disabled){background:var(--blue-dark)}.button.secondary{color:var(--blue);background:0 0;border-color:#9bafb7}.button.secondary:hover{background:var(--blue-pale)}.text-link{color:var(--blue);align-items:center;gap:10px;min-height:44px;font-weight:650;text-decoration:none;display:inline-flex}.course-entry{border-bottom:1px solid var(--line);align-items:center;gap:32px;padding:24px 0;display:flex}.course-entry-body{flex:1;min-width:0}.course-meta{color:var(--muted);align-items:center;gap:16px;margin-bottom:8px;display:flex}.course-meta>span:first-child{color:var(--blue);font-weight:700}.course-entry h3{margin-bottom:8px;font-size:25px;line-height:1.5}.course-entry h3 a{text-decoration:none}.course-entry p{color:var(--muted);font-size:16px;line-height:1.8}.course-entry-actions{flex-shrink:0;align-items:center;display:flex}.course-list{border-top:1px solid var(--line)}.home-lessons{margin-top:48px}.editorial-list{border-top:1px solid var(--line)}.editorial-list>a{border-bottom:1px solid var(--line);align-items:flex-start;gap:25px;padding:26px 44px 26px 0;text-decoration:none;display:flex;position:relative}.editorial-list>a>div{overflow-wrap:anywhere;flex:1;min-width:0}.editorial-list>a:hover h2,.editorial-list>a:hover h3,.course-entry h3 a:hover{text-underline-offset:5px;text-decoration:underline}.article-number{color:var(--blue);font-variant-numeric:tabular-nums;letter-spacing:.06em;flex-shrink:0;font-size:17px;line-height:2}.editorial-list h3,.editorial-list h2{margin:4px 0 6px}.editorial-list p{color:var(--muted)}.row-arrow{color:var(--blue);font-size:20px;position:absolute;top:50%;right:4px;transform:translateY(-50%)}.resume-strip{background:var(--blue-pale);border-radius:10px;justify-content:space-between;align-items:center;gap:20px;margin:28px 0;padding:24px;display:flex}.resume-strip h2{margin:3px 0}.site-footer{border-top:1px solid var(--line);align-items:flex-start;gap:30px;max-width:1120px;margin:auto;padding:32px 30px 46px;display:flex}.footer-brand{font-size:18px;font-weight:750;text-decoration:none}.site-footer nav{flex-wrap:wrap;justify-content:flex-end;gap:8px 22px;margin-left:auto;display:flex}.site-footer nav a{min-height:44px;color:var(--muted);align-items:center;font-size:16px;text-decoration:none;display:flex}.breadcrumbs{flex-wrap:wrap;gap:12px;margin-bottom:35px;font-size:16px;display:flex}.breadcrumbs a{color:var(--blue)}.course-detail-heading>p{margin-top:20px;font-size:18px;line-height:1.9}.course-facts{color:var(--muted);flex-wrap:wrap;gap:10px 22px;margin:20px 0 28px;display:flex}.audience{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:38px;padding:30px 0}.audience p{margin-top:14px}.syllabus>section{border-bottom:1px solid var(--line);padding:24px 0}.syllabus-heading{align-items:center;gap:16px;margin-bottom:16px;display:flex}.syllabus-heading>span:last-child{white-space:nowrap;margin-left:auto}.lesson-link{min-height:48px;color:var(--blue);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;padding:10px 0;text-decoration:none;display:flex}.reading header{border-bottom:1px solid var(--line);margin-bottom:34px;padding-bottom:28px}.lead{margin-top:20px;font-size:18px;line-height:1.9}.article-meta{color:var(--muted);gap:22px;margin-top:20px;display:flex}.prose{overflow-wrap:anywhere;font-size:17px;line-height:2}.prose h2{margin:36px 0 18px;font-size:23px}.prose p+p{margin-top:20px}.prose code{background:#ebece6;border-radius:4px;padding:3px 5px;font-size:16px}.prose pre{white-space:pre-wrap}.question-markdown img{max-width:100%;height:auto}.prose table{table-layout:fixed;overflow-wrap:anywhere;border-collapse:collapse;width:100%}.prose th,.prose td{border:1px solid var(--line);padding:8px}.question-markdown pre{white-space:pre-wrap;overflow-wrap:anywhere}.question-prompt.question-markdown{white-space:normal;font-size:23px}.question-context{white-space:pre-wrap}.choice-content{flex:1;min-width:0}.sources,.related-section{border-top:1px solid var(--line);margin-top:40px;padding-top:30px}.sources a,.reading a{overflow-wrap:anywhere}.reading>h2{margin-top:30px}.reading dl,.explanation dl{margin:20px 0}.reading dl>div,.explanation dl>div{border-bottom:1px solid var(--line);padding:18px 0}dt{font-weight:700}dd{margin:8px 0 0;line-height:1.9}.related-questions{margin-top:28px}.related-questions,.syllabus ol{overflow-wrap:anywhere}.practice-setup{max-width:600px;margin:auto}.practice-setup form{margin-top:36px}.practice-setup fieldset{margin:28px 0}.segments{gap:12px;display:flex}.segments label{cursor:pointer;background:var(--white);border:1px solid #9bafb7;border-radius:7px;flex:1;justify-content:center;align-items:center;gap:12px;min-height:56px;display:flex}.segments label.selected{background:var(--blue-pale);border:2px solid var(--blue);color:var(--blue);font-weight:700}.segments input{opacity:0;width:1px;height:1px;position:absolute}.segments label:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:3px}.mode-options{flex-wrap:wrap;gap:24px;display:flex}.mode-options label{align-items:center;gap:10px;min-height:44px;display:flex}.practice-setup .button{min-width:230px;margin-top:18px}.exercise-top{justify-content:space-between;align-items:center;gap:20px;font-size:19px;font-weight:650;display:flex}.exercise-top a{font-size:17px;text-decoration:none}.muted{color:var(--muted)}.exercise-progress{background:var(--line);border-radius:5px;height:5px;margin:20px 0 30px}.exercise-progress span{background:var(--blue);border-radius:5px;height:100%;display:block}.question-meta{color:var(--muted);justify-content:space-between;gap:18px;margin-bottom:15px;font-size:16px;display:flex}.question-prompt{white-space:pre-wrap;letter-spacing:.01em;overflow-wrap:anywhere;margin-bottom:28px;font-size:23px;line-height:1.9}.labeled-choices{padding-left:0;list-style:none}.explanation>p,.static-answer>p{white-space:pre-wrap}.choices{gap:12px;display:grid}.choice{background:var(--white);cursor:pointer;border:1px solid #a6b4b8;border-radius:8px;align-items:center;gap:16px;padding:17px 18px;font-size:17px;line-height:1.8;display:flex;position:relative}.choice.chosen{border:2px solid var(--blue);background:var(--blue-pale);padding:16px 17px}.choice input{opacity:0;width:1px;height:1px;position:absolute}.choice:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:3px}.choice-letter{background:var(--white);border:1px solid #a6b4b8;border-radius:6px;place-items:center;min-width:30px;height:30px;font-size:15px;font-weight:700;display:grid}.chosen .choice-letter{background:var(--blue);border-color:var(--blue);color:#fff}.choice.correct{border:2px solid var(--green);background:var(--green-pale);padding:16px 17px}.choice.incorrect{border:2px solid var(--red);background:var(--red-pale);padding:16px 17px}.choice-state{color:var(--green);font-size:16px;display:block}.incorrect .choice-state{color:var(--red)}.confidence{align-items:center;gap:12px;min-height:44px;margin:20px 0;display:flex}.answer-button,.next-button{width:100%;min-height:54px;margin-top:8px}.save-status{color:var(--muted);margin:20px 0;font-size:16px}.error{background:var(--red-pale);color:var(--red);border:1px solid var(--red);border-radius:6px;margin:20px 0;padding:16px}.explanation{border-top:1px solid var(--line);margin-top:30px;padding-top:26px;font-size:17px}.explanation h2{margin:28px 0 14px}.answer-result{align-items:center;gap:18px;font-size:25px;font-weight:750;display:flex}.answer-result.right{color:var(--green)}.answer-result.wrong{color:var(--red)}.answer-result span{color:var(--muted);font-size:16px;font-weight:500}.explanation p{line-height:1.9}.back-button{color:var(--blue);background:0 0;border:0;min-height:44px;margin-top:18px;padding:12px 0}.completion{text-align:center}.completion>p{margin-top:16px}.completion h1{margin:15px 0 30px;font-size:48px}.completion h1 span{font-size:20px}.result-list{text-align:left;border-top:1px solid var(--line);max-width:480px;margin:auto}.result-list>a{border-bottom:1px solid var(--line);justify-content:space-between;gap:20px;padding:14px 0;text-decoration:none;display:flex}.completion .actions{justify-content:center;margin:30px 0}.actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.empty-state{text-align:center;background:var(--white);border:1px solid var(--line);border-radius:10px;padding:55px 20px}.empty-state h2{margin:20px 0 26px}.list-toolbar{justify-content:space-between;align-items:center;gap:16px;margin:26px 0;display:flex}.review-list{border-top:1px solid var(--line);margin-top:28px}.review-list>a{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:10px 20px;padding:22px 0;text-decoration:none;display:flex}.review-list strong{width:100%;font-size:18px;line-height:1.9}.status-tag{background:var(--blue-pale);color:var(--blue-dark);border-radius:4px;align-items:center;padding:3px 9px;font-size:16px;display:inline-flex}.dashboard{font-variant-numeric:tabular-nums;gap:32px;display:grid}.dashboard-heading,.dashboard-filter,.panel-heading{justify-content:space-between;align-items:center;gap:16px;min-width:0;display:flex}.dashboard-heading{flex-wrap:wrap}.dashboard-filter{justify-content:flex-start}.dashboard-filter select{width:280px;min-width:0}.dashboard-overview,.dashboard-main-grid,.dashboard-course-grid{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);align-items:start;gap:24px;display:grid}.dashboard-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-course-grid>:only-child{grid-column:1/-1}.dashboard-panel{background:var(--white);border:1px solid var(--line);border-radius:10px;min-width:0;padding:24px}.dashboard .daily-goal{background:0 0;border:0;padding:24px}.dashboard .panel-heading{margin-bottom:24px}.dashboard .panel-heading a,.course-actions>a,.unit-results>a{flex-shrink:0;align-items:center;min-height:44px;display:inline-flex}.dashboard-resume{background:var(--blue-pale);border-color:#0000}.dashboard-resume>h2{align-items:center;min-height:44px;display:flex}.dashboard-resume>img{margin-bottom:20px}.resume-position{margin:12px 0;font-size:18px}.resume-question{overflow-wrap:anywhere}.dashboard-resume .button{margin-top:24px}.dashboard .goal-count strong{font-size:36px;line-height:1.3}.goal-remaining{margin-top:16px;font-size:18px}.dashboard .dashboard-metrics{border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:0 0;border-radius:0;gap:0;padding:16px 0}.dashboard .dashboard-metrics>div,.dashboard .dashboard-metrics>div:last-child{border:0;border-right:1px solid var(--line);background:0 0;border-radius:0;gap:10px;padding:8px 24px}.dashboard .dashboard-metrics>div:last-child{border-right:0}.dashboard .dashboard-metrics span{color:var(--ink);line-height:1.5}.dashboard-metrics>div>span:first-child{min-height:3em}.dashboard-activity,.dashboard-review{background:0 0;border:0;padding:0}.dashboard-main-grid{gap:40px}.period-controls{flex-shrink:0;gap:4px;display:flex}.period-controls button{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:5px;min-width:54px;min-height:44px;padding:8px}.period-controls button[aria-pressed=true]{color:var(--white);background:var(--blue);border-color:var(--blue)}.activity-range{margin:24px 0 16px}.activity-plot,.activity-calendar{grid-template-columns:repeat(7,minmax(44px,1fr));gap:4px;display:grid}.activity-calendar{grid-template-columns:repeat(5,minmax(44px,1fr));gap:8px}.activity-day{min-width:44px;color:var(--ink);border:0;border-bottom:2px solid var(--line);background:0 0;border-radius:4px;flex-direction:column;align-items:center;gap:8px;padding:8px 0;display:flex}.activity-day strong{font-size:20px}.activity-day:hover,.activity-day[aria-pressed=true]{background:var(--blue-pale);border-color:var(--blue)}.activity-bar{width:20px;height:112px;display:block;position:relative}.activity-bar>span{background:var(--blue);border-radius:3px 3px 0 0;width:100%;position:absolute;bottom:0;left:0}.activity-calendar .activity-day{border:1px solid var(--line);justify-content:center;min-height:80px}.activity-calendar .activity-day[aria-pressed=true]{border-color:var(--blue)}.activity-selection{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:20px;padding:16px 0;display:flex}.priority-list>div{border-top:1px solid var(--line);padding:20px 0}.priority-list h3,.dashboard-course h3{overflow-wrap:anywhere}.priority-list p{overflow-wrap:anywhere;margin:8px 0 16px}.priority-detail,.course-actions,.unit-results{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;display:flex}.dashboard-course h3{margin:0}.dashboard-course .course-progress-heading>strong{white-space:nowrap}.course-stats{flex-wrap:wrap;gap:16px 32px;margin:20px 0;display:flex}.course-stats dd{margin:4px 0 0;font-size:22px;font-weight:700}.course-stats dd span{font-size:16px;font-weight:400}.revision-status{margin:16px 0}.dashboard-units{border-top:1px solid var(--line);margin-top:20px}.dashboard-unit{border-top:1px solid var(--line);padding:20px 0}.dashboard-unit>div:first-child{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;margin-bottom:10px;display:flex}.dashboard-unit .unit-results{margin-top:8px}.dashboard-history>summary{font-size:22px;font-weight:700}.dashboard-history{border:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:0 0;border-radius:0;padding:16px 0}.dashboard-history>summary>span{margin-left:16px;font-size:16px;font-weight:400}.history-row{border-top:1px solid var(--line);flex-wrap:wrap;gap:12px 20px;padding:20px 0;display:flex}.history-row>a,.history-row>strong{overflow-wrap:anywhere;width:100%;font-weight:650}.history-row time{margin-left:auto}.answer-right{color:var(--green)}.answer-wrong{color:var(--red)}.dashboard-export{justify-content:flex-end;display:flex}@media (width<=900px){.dashboard-overview,.dashboard-main-grid,.dashboard-course-grid{grid-template-columns:minmax(0,1fr)}}@media (width<=600px){.dashboard{gap:24px}.dashboard-filter{width:100%}.dashboard-filter select{flex:1;width:0}.dashboard-panel,.dashboard .daily-goal{padding:20px}.dashboard .dashboard-metrics{gap:24px 0}.dashboard .dashboard-metrics>div,.dashboard .dashboard-metrics>div:last-child{padding:8px 16px}.dashboard .dashboard-metrics>div:nth-child(2n){border-right:0}.dashboard .dashboard-activity,.dashboard .dashboard-review{padding:0}.activity-plot{gap:2px}.dashboard .period-summary{gap:16px}.dashboard .period-summary dd{font-size:22px}.activity-calendar{gap:6px}.activity-calendar .activity-day strong{font-size:18px}}@media (width<=350px){.activity-plot{grid-template-columns:repeat(4,minmax(44px,1fr))}}.daily-goal{border-bottom:1px solid var(--line);padding:24px 0}.daily-goal .section-heading{margin:0 0 16px}.daily-goal .section-heading a{align-items:center;min-height:44px;display:inline-flex}.goal-count,.course-progress-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.goal-count strong{font-size:28px}.period-summary{flex-wrap:wrap;gap:20px 32px;margin:0 0 24px;display:flex}.period-summary dd{margin:4px 0 0;font-size:24px;font-weight:700}.daily-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%}.daily-table th,.daily-table td{border-bottom:1px solid var(--line);text-align:right;padding:12px 4px}.daily-table th:first-child{text-align:left}.question-extras:empty{display:none}.question-extras>details,.question-extras>section{border-top:1px solid var(--line);margin:24px 0;padding:16px 0}.question-extras h2{margin-bottom:16px}.question-extras p+p,.question-extras .prose+.prose{margin-top:16px}.question-extras p{white-space:pre-wrap;overflow-wrap:anywhere}.question-extras .prose p{white-space:normal}.unit-progress .course-progress-heading h3{margin:0}.metrics{background:var(--white);border:1px solid var(--line);border-radius:10px;grid-template-columns:repeat(4,1fr);padding:24px 0;display:grid}.metrics>div{border-right:1px solid var(--line);flex-direction:column;gap:15px;padding:0 20px;display:flex}.metrics>div:last-child{border:0}.metrics span{color:var(--muted);font-size:16px}.metrics strong{white-space:nowrap;font-size:31px;line-height:1.3}.unit-progress section{border-bottom:1px solid var(--line);padding:22px 0}.unit-progress h3{margin-bottom:24px}.unit-progress-row{margin:22px 0}.unit-progress-row>div{justify-content:space-between;gap:16px;margin-bottom:8px;display:flex}progress{background:var(--line);width:100%;height:7px;color:var(--blue);accent-color:var(--blue);border:0;border-radius:5px;display:block;overflow:hidden}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--blue)}.history-list>a{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:10px 18px;padding:20px 0;text-decoration:none;display:flex}.history-list strong{order:3;width:100%}.history-list time{color:var(--muted);margin-left:auto}.settings-section{border-top:1px solid var(--line);padding:28px 0}.settings-section h2{margin-bottom:24px}.settings-section .button{margin:8px 8px 8px 0}.setting-row{justify-content:space-between;align-items:center;gap:20px;min-height:56px;display:flex}.terms-checkbox{align-items:center;gap:12px;min-height:48px;margin:18px 0;line-height:1.9;display:flex}.guest-import{border-top:1px solid var(--line);margin-top:24px;padding-top:24px}.confirmation{background:var(--red-pale);border:1px solid #b9857c;border-radius:8px;margin:22px 0;padding:20px}.confirmation p{margin-bottom:12px}.danger{background:var(--red);border-color:var(--red)}.button.danger:hover{background:#7b2525}.button.danger-outline{border-color:var(--red);color:var(--red);background:0 0}.notice{background:var(--ink);color:var(--white);border-radius:7px;padding:16px 20px;font-size:16px;position:sticky;bottom:18px}.static-choices li{border-bottom:1px solid var(--line);padding:14px}.static-choices,.static-answer{overflow-wrap:anywhere}.static-answer{border-top:1px solid var(--line);margin-top:35px;padding-top:28px}.static-answer h2{margin:20px 0 16px}.report-error{border-top:1px solid var(--line);margin:35px 0;padding:24px 0}.report-error a{margin-left:14px;display:inline-block}.category-tags{gap:12px;margin-bottom:24px;display:flex}.category-tags span{color:var(--blue);background:var(--blue-pale);border-radius:4px;padding:6px 14px}.prose-page>h1{margin-bottom:30px}.prose-page h2{margin:32px 0 16px}.prose-page p{margin:16px 0;font-size:17px;line-height:1.95}.skip-link{background:var(--ink);color:#fff;z-index:10;padding:10px 20px;position:absolute;top:-100px;left:10px}.skip-link:focus{top:10px}.sr-only{clip:rect(0, 0, 0, 0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width>=1000px){.home-heading{margin-top:10px}.wide .section-heading{margin-top:40px}.wide .home-search{max-width:720px}.home-lessons .editorial-list>a{padding-top:28px;padding-bottom:28px}.main-content.wide{padding-top:48px}.home-heading img{margin-right:30px}}@media (width<=700px){h1{font-size:29px}h2{font-size:21px}.header-inner{grid-template-columns:minmax(0,1fr) auto;column-gap:12px;min-height:74px;padding:0 20px;display:grid}.brand{gap:6px;min-height:70px;font-size:24px}.brand img{width:31px;height:34px}.brand-dot{margin-left:-6px}.account-link{white-space:nowrap;grid-area:1/2;margin-left:0;font-size:16px}.header-inner nav{grid-area:2/1/auto/-1;justify-content:space-around;gap:0;width:100%;min-height:48px;margin:0}.header-inner nav a{flex:1;padding-bottom:9px}.header-inner{row-gap:0}.development-status{padding:6px 10px;font-size:16px}.main-content,.main-content.wide{padding:30px 20px 60px}.home-heading img{width:75px;height:75px}.home-heading,.page-heading{margin-bottom:24px}.search-form{gap:5px}.home-search{margin-bottom:30px}.search-form input:not([type=checkbox]){min-height:48px;font-size:17px}.search-form .button{padding:11px 15px}.section-heading{margin-top:30px;margin-bottom:18px}.course-entry{flex-direction:column;align-items:stretch;gap:16px}.course-meta{flex-wrap:wrap;gap:8px 16px}.course-entry h3{font-size:24px}.course-entry-actions,.course-entry-actions .button{width:100%}.home-lessons{margin-top:35px}.editorial-list>a{gap:16px;padding:23px 28px 23px 0}.editorial-list h3{font-size:19px}.row-arrow{right:0}.editorial-list p{margin-top:8px;font-size:16px}.site-footer{margin:0 20px;padding:26px 0;display:block}.site-footer nav{justify-content:flex-start;gap:0 20px;margin-top:16px}.resume-strip{flex-wrap:wrap;padding:20px}.resume-strip .button{width:100%}.breadcrumbs{gap:8px;margin-bottom:28px}.course-detail-heading>p{font-size:17px}.course-facts{gap:8px 16px}.syllabus-heading{align-items:flex-start;gap:12px}.syllabus-heading h3{font-size:18px}.syllabus-heading>span:last-child{font-size:16px}.reading h1{font-size:28px}.reading h1.question-prompt{font-size:21px}.prose{font-size:17px}.prose h2{font-size:22px}.question-prompt{font-size:21px;line-height:1.85}.exercise-top{font-size:18px}.question-meta{gap:12px}.choice{gap:12px;padding:16px 14px;font-size:17px}.choice.chosen,.choice.correct,.choice.incorrect{padding:15px 13px}.choice-letter{min-width:28px;height:28px;font-size:15px}.page-heading .button{gap:8px;padding:10px 14px;font-size:16px}.list-toolbar{flex-wrap:wrap;gap:12px}.list-toolbar select{min-width:180px;font-size:16px}.metrics{grid-template-columns:repeat(2,1fr);row-gap:24px}.metrics>div:nth-child(2){border-right:0}.metrics>div{gap:10px;padding:0 18px}.metrics strong{font-size:30px}.settings-section .button{width:100%;margin:8px 0}.terms-checkbox{align-items:flex-start}.terms-checkbox input{margin-top:6px}.report-error a{margin:16px 0 0}.segments{gap:8px}.segments label{min-height:53px}.completion h1 span{font-size:18px}.completion .actions .button{width:100%}.empty-state{padding:30px 15px}.notice{bottom:12px}.reading .article-meta{flex-wrap:wrap;gap:8px 18px}.section-heading>span{font-size:16px}.prose-page p{font-size:17px}.related-section .button{width:100%}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.button{border:2px solid var(--blue-dark);min-height:54px;box-shadow:none;background:#279;border-bottom-width:4px;border-radius:15px;font-size:18px;font-weight:700;transition:transform .1s,box-shadow .1s,background .12s}.button.secondary{border-color:var(--line);box-shadow:none}.button:active:not(:disabled){transform:translateY(var(--button-depth));box-shadow:none}.button:disabled{opacity:1;background:var(--line);border-color:var(--line);color:var(--muted);box-shadow:none}.button.google-login-button{color:#1f1f1f;box-shadow:0 3px 0 var(--line);background:#fff;border:1px solid #747775;font-weight:500}.button.google-login-button:disabled{color:var(--muted);box-shadow:none}.learning-layout{grid-template-rows:auto 1fr auto;grid-template-columns:218px minmax(0,1fr);display:grid}.learning-layout .site-header{border:0;border-right:1px solid var(--line);grid-area:1/1/4;height:100vh;position:sticky;top:0}.learning-layout .header-inner{flex-direction:column;align-items:stretch;gap:32px;height:100%;min-height:0;padding:30px 20px;display:flex}.learning-layout .brand{font-size:24px}.learning-layout .brand-dot{display:none}.learning-layout .header-inner nav{flex-direction:column;align-self:auto;gap:12px;margin:0;display:flex}.learning-layout .header-inner nav a{border:0;border-radius:14px;justify-content:flex-start;min-height:56px;padding:14px 22px;font-size:19px}.learning-layout .header-inner nav a.active{background:var(--blue-pale)}.learning-layout .account-link{margin:0;padding:10px 12px;font-size:16px}.learning-layout .development-status,.learning-layout .main-content,.learning-layout .site-footer{grid-column:2}.learning-layout .main-content{width:100%;padding:40px 36px 64px}.learning-layout .site-footer{margin:0}.course-detail-heading>.button{margin-top:18px}.learning-path{margin:28px 0 44px;scroll-margin-top:24px}.path-progress{color:var(--blue);margin-bottom:20px;font-size:18px;font-weight:700}.path-layout{grid-template-columns:minmax(0,600px) 224px;justify-content:center;gap:44px;display:grid}.path-unit{margin-bottom:26px}.path-unit-heading{color:#20576d;background:#e9f4f8;border:2px solid #c9e2ec;border-radius:18px;justify-content:space-between;align-items:center;gap:18px;padding:20px 22px;display:flex}.path-unit-heading span{font-size:17px;font-weight:700}.path-unit-heading h2{margin:5px 0 0;font-size:23px;line-height:1.45}.path-unit-current{color:#fff;background:#279;border-color:#17536f}.path-guide{min-height:50px;color:inherit;border:2px solid;border-radius:14px;flex-shrink:0;align-items:center;gap:8px;padding:8px 12px;text-decoration:none;display:flex}.path-steps{margin:0;padding:36px 0 0;list-style:none}.path-steps>li{--step-offset:0px;justify-items:center;margin:0;padding:0 0 32px;display:grid;position:relative}.path-steps>.path-position-1{--step-offset:-56px}.path-steps>.path-position-2{--step-offset:-80px}.path-steps>.path-position-3{--step-offset:-48px}.path-node-wrap{width:110px;height:110px;transform:translateX(var(--step-offset));place-items:center;display:grid;position:relative}.path-ring{pointer-events:none;fill:none;stroke-width:7px;width:110px;height:110px;position:absolute;inset:0;transform:rotate(-90deg)}.path-ring circle:first-child{stroke:#e0e9ec}.path-ring circle:last-child{stroke:#32a47c;stroke-linecap:round}.path-step{width:80px;height:80px;color:var(--ink);cursor:pointer;background:#a9d5e6;border:0;border-radius:50%;place-items:center;padding:0;font-size:18px;transition:transform .1s,box-shadow .1s;display:grid;position:relative;box-shadow:0 7px #6daec6}.path-current .path-step{background:#279;box-shadow:0 7px #17536f}.path-step.path-done{background:#8bd2b4;box-shadow:0 7px #539d7f}.path-step.path-future{cursor:default;background:#e2e8ea;box-shadow:0 7px #bbc7cc}.path-step:disabled{opacity:1}.path-future .study-icon{filter:grayscale();opacity:.65}.path-step:active:not(:disabled){box-shadow:none;transform:translateY(6px)}.path-step:focus-visible{outline-offset:10px;outline:3px solid #173f53}.path-actions{color:#fff;text-align:left;background:#279;border:2px solid #17536f;border-radius:18px;width:min(320px,100%);margin:12px 0 10px;padding:20px;position:relative}.path-actions:before{content:"";width:18px;height:18px;top:-11px;left:calc(50% + var(--step-offset) - 9px);background:inherit;border-top:2px solid #17536f;border-left:2px solid #17536f;position:absolute;transform:rotate(45deg)}.path-actions h3{margin:0 0 4px;font-size:21px;line-height:1.5}.path-actions p{margin:4px 0;font-size:18px;font-weight:650}.path-actions .path-answered{margin-bottom:18px;font-size:17px}.path-actions .button{color:#17536f;background:#fff;border-color:#c5e1e8;width:100%;margin-top:14px;display:flex}.path-actions .button:hover{background:#ecf7fb}.path-completed-actions{color:#225c45;background:#edf8f1;border-color:#5ba687}.path-completed-actions:before{border-color:#5ba687}.path-lupi{pointer-events:none;width:88px;height:88px;position:absolute;bottom:8px;right:-76px}.path-aside{flex-direction:column;align-items:center;gap:24px;padding-top:2px;display:flex}.path-review{background:#fffefa;border:2px solid #d3e5e9;border-radius:20px;width:100%;padding:24px}.path-review>.study-icon{float:right}.path-review h2{color:#20576d}.path-review p{color:#20576d;margin:14px 0 20px;font-size:20px}.path-review strong{margin-right:5px;font-size:38px}.path-review .button{width:100%}.path-record-link,.path-finished{justify-content:center;align-items:center;gap:12px;font-size:19px;font-weight:700;display:flex}.path-record-link{color:#20576d;padding:14px}.path-finished{color:#25604a;padding:24px 0}.lesson-next{flex-wrap:wrap;margin-bottom:24px}.course-index{border-top:1px solid var(--line);padding-top:24px}.course-index>summary{font-size:20px;font-weight:700}.exercise{max-width:780px;margin:auto}.exercise-top{align-items:center;gap:20px;font-size:19px;display:flex}.exercise-top>span:last-child{flex-shrink:0}.exercise-course{overflow-wrap:anywhere;text-align:center;flex:1;font-size:18px}.exercise-progress{background:var(--line);border:0;border-radius:20px;height:14px;margin:30px 0 34px;overflow:hidden}.exercise-progress>span{background:var(--green);border-radius:inherit}.exercise .question-prompt{overflow-wrap:anywhere;margin-bottom:28px;font-size:28px;line-height:1.65}.exercise .question-meta{margin-bottom:18px;font-size:18px}.exercise .question-context{margin-bottom:24px;font-size:20px}.exercise .choices{gap:16px;display:grid}.exercise .choice{border:2px solid var(--line);min-height:74px;box-shadow:0 3px 0 var(--line);border-radius:16px;align-items:center;padding:18px 20px;font-size:21px;transition:transform .1s,box-shadow .1s,background .1s}.exercise .choice.chosen{border-color:var(--blue);background:var(--blue-pale);box-shadow:0 3px 0 var(--blue)}.exercise .choice.correct{border-color:var(--green);background:var(--green-pale);box-shadow:0 3px 0 var(--green)}.exercise .choice.incorrect{border-color:var(--red);background:var(--red-pale);box-shadow:0 3px 0 var(--red)}.exercise .choice:active:has(input:not(:disabled)){box-shadow:none;transform:translateY(3px)}.exercise .choice:has(input:disabled){cursor:default}.exercise .choice-letter{flex-shrink:0;place-items:center;width:36px;height:36px;font-size:18px;display:grid}.exercise .choice-reason{color:var(--ink);margin-top:12px;font-size:18px;line-height:1.8}.exercise .choice-state{font-size:17px;display:block}.exercise .confidence{margin:28px 0;font-size:18px}.exercise .answer-button,.exercise .next-button{width:100%;margin-top:12px}.exercise .explanation{padding:26px 0}.exercise .answer-result{margin-bottom:24px;font-size:23px}.exercise .explanation p{font-size:18px}.study-exit{border:2px solid var(--line);background:var(--white);max-width:min(480px,100% - 32px);color:var(--ink);border-radius:22px;padding:32px}.study-exit::backdrop{background:#0f1f2673}.study-exit p{margin:18px 0 24px;font-size:18px}.study-exit .actions{flex-wrap:wrap}.completion{text-align:center;max-width:640px;margin:auto}.completion>img{width:116px;height:116px;margin-bottom:24px}.completion>h1{font-size:32px}.completion-course{margin:14px 0 28px;font-size:19px}.completion-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:32px;display:grid}.completion-metrics>div{border:2px solid var(--line);background:var(--white);border-radius:18px;flex-direction:column;align-items:center;padding:18px 12px;font-size:17px;display:flex}.completion-metrics strong{font-size:29px}.completion>.actions{justify-content:center}.study-benefit{text-align:left;border:2px solid var(--line);background:var(--white);border-radius:22px;margin:32px 0;padding:28px}.study-benefit h2{font-size:23px}.study-topics{gap:18px;margin:24px 0;display:grid}.study-topics>div{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;padding-bottom:18px;display:flex}.study-topics strong{white-space:nowrap;font-size:20px}.study-benefit .button{width:100%}.completion-answers{text-align:left;margin-top:28px}.completion-answers summary{font-size:19px;font-weight:700}@media (width<=960px){.learning-layout{grid-template-columns:180px minmax(0,1fr)}.learning-layout .header-inner{padding:26px 14px}.learning-layout .brand{font-size:20px}.path-layout{grid-template-columns:minmax(0,1fr)}.path-aside{flex-direction:row;justify-content:space-between;align-items:center}.path-review{max-width:300px}}@media (width<=700px){.learning-layout{display:block}.learning-layout .site-header{border-bottom:1px solid var(--line);height:auto;position:static}.learning-layout .header-inner{grid-template-columns:minmax(0,1fr) auto;gap:12px 20px;height:auto;padding:18px 20px 0;display:grid}.learning-layout .brand{font-size:22px}.learning-layout .account-link{margin:0 0 0 auto;padding:10px 12px;font-size:16px}.learning-layout .header-inner nav{flex-direction:row;flex:1 0 100%;gap:4px}.learning-layout .header-inner nav a{border-radius:12px 12px 0 0;flex:1;justify-content:center;min-height:48px;padding:10px;font-size:18px}.learning-layout .main-content{padding:28px 20px 48px}.path-layout{gap:28px}.path-unit-heading{gap:12px;padding:16px}.path-unit-heading h2{font-size:21px}.path-guide{flex-direction:column;gap:0;padding:6px 10px}.path-actions{width:min(320px,100% - 8px)}.path-lupi{width:54px;height:54px;bottom:74px;right:-5px}.path-actions h3{padding-right:32px}.path-aside{flex-wrap:wrap}.path-review{padding:20px}.exercise-top{flex-wrap:wrap;gap:12px}.exercise-course{text-align:left;flex-basis:100%;order:3}.exercise-top>span:last-child{margin-left:auto}.exercise .question-prompt{font-size:26px}.exercise .choice{gap:10px;padding:16px;font-size:20px}.exercise .choice-letter{width:26px}.completion-metrics{gap:8px}.completion-metrics>div{padding:16px 8px}.completion-metrics strong{font-size:25px}.study-benefit{padding:24px 20px}.study-benefit h2{font-size:22px}.study-topics h3{font-size:19px}.study-exit{padding:24px}}@media (width<=420px){.header-inner,.learning-layout .header-inner{column-gap:12px;padding-left:14px;padding-right:14px}.header-inner .brand-dot{display:none}.header-inner .brand{font-size:22px}.google-login-word{display:block}.google-login-button{line-height:1.2}.learning-layout .header-inner{column-gap:12px}}[data-category]{--course-accent:var(--blue)}[data-category=certification]{--course-accent:#82571e}[data-category=work]{--course-accent:var(--green)}[data-category=everyday]{--course-accent:#775157}.course-mark{width:60px;height:60px;color:var(--course-accent,var(--blue));background:0 0;border-radius:18px;flex:0 0 60px;place-items:center;display:grid}.course-count{background:var(--blue-pale);white-space:nowrap;border-radius:24px;padding:8px 16px;font-weight:700}.course-list{border:0;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.course-entry{background:var(--white);box-shadow:none;border:2px solid #d7e4e8;border-radius:20px;grid-template-columns:60px minmax(0,1fr);align-items:start;gap:16px;padding:24px;display:grid}.course-entry-body{flex-direction:column;gap:12px;height:100%;display:flex}.course-entry .course-meta{color:var(--ink);flex-direction:column;align-items:flex-start;gap:8px;margin:0}.course-entry .course-meta .course-category{color:var(--course-accent)}.course-entry h3{overflow-wrap:anywhere;margin:0;font-size:22px}.course-entry p{color:var(--ink)}.course-entry-actions{grid-column:1/-1;align-self:end;margin-top:8px}.course-entry-actions .button{width:100%}.course-detail-heading{border:2px solid var(--line);background:var(--white);border-radius:20px;padding:28px}.course-detail-heading .course-mark{float:right;margin:0 0 16px 20px}.course-detail-heading h1{overflow-wrap:anywhere}.dashboard-panel:not(.dashboard-history){border-width:2px;border-radius:20px}.dashboard-resume{background:#e3f0f5}.dashboard .daily-goal{background:#fbf1d9;border:2px solid #ecd59b;border-radius:20px}.dashboard .goal-count{flex-wrap:wrap;gap:12px}.goal-count>img{flex-shrink:0;margin-left:auto}.dashboard .dashboard-metrics{background:var(--white);border:2px solid #d7e4e8;border-radius:20px}.dashboard .dashboard-metrics>div{padding:8px 20px}.dashboard .dashboard-metrics .metric-label{min-height:3em}.dashboard .dashboard-metrics strong{color:var(--blue)}.dashboard .dashboard-metrics>div:last-child strong{color:var(--green)}.dashboard-course{box-shadow:none;border-color:#d7e4e8}.course-progress-heading{flex-wrap:wrap;justify-content:flex-start;gap:12px}.course-progress-heading h3{overflow-wrap:anywhere;flex:1;min-width:120px}.course-progress-heading>strong{margin-left:auto}.dashboard progress{border-radius:12px;height:10px;overflow:hidden}.dashboard progress::-webkit-progress-bar{border-radius:12px}.dashboard progress::-webkit-progress-value{border-radius:12px}.activity-day{border-radius:12px}.activity-bar{border-radius:8px 8px 0 0}.period-controls button{border-width:2px;border-radius:12px;font-weight:700}.practice-setup{background:var(--white);border:2px solid var(--line);border-radius:20px;padding:28px}.practice-heading{align-items:center;gap:20px;display:flex}.practice-heading h1{overflow-wrap:anywhere;flex:1;min-width:0;font-size:28px}.practice-heading img{flex-shrink:0}.practice-setup .segments label{box-shadow:0 3px 0 var(--line);border-width:2px;border-radius:14px;font-weight:700}.practice-setup .segments label.selected{box-shadow:0 3px 0 var(--blue)}.practice-setup .mode-options{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.practice-setup .mode-options label{border:2px solid var(--line);border-radius:12px;justify-content:center;padding:12px}.practice-setup .mode-options label:has(input:checked){border-color:var(--blue);background:var(--blue-pale);color:var(--blue);font-weight:700}.practice-setup .mode-options label:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:3px}.practice-setup .button{width:100%;min-width:0}.exercise .question-meta>span{background:var(--blue-pale);color:var(--blue-dark);border-radius:12px;padding:5px 12px}.exercise .question-meta>span:last-child{color:#645020;background:#fbf1d9}.exercise .answer-result{border:2px solid;border-radius:18px;padding:18px}.exercise .answer-result.right{background:var(--green-pale)}.exercise .answer-result.wrong{background:var(--red-pale)}.answer-result>img{flex-shrink:0}.answer-result-copy{overflow-wrap:anywhere;min-width:0}.answer-result-copy>span{display:block}.exercise .choice.correct .choice-letter{background:var(--green);color:var(--white);border-color:var(--green)}.exercise .choice.incorrect .choice-letter{background:var(--red);color:var(--white);border-color:var(--red)}@media (width<=1000px){.course-list{grid-template-columns:minmax(0,1fr)}}@media (width<=700px){.course-entry{gap:14px;padding:20px}.course-detail-heading,.practice-setup{padding:20px}.practice-heading{gap:12px}.practice-heading h1{font-size:24px}.practice-heading img{width:64px;height:64px}.practice-setup .mode-options{grid-template-columns:minmax(0,1fr)}.practice-setup .mode-options label{justify-content:flex-start}.dashboard .daily-goal{padding:20px}.dashboard .course-mark{border-radius:14px;flex-basis:48px;width:48px;height:48px}.dashboard .course-mark [data-study-icon]{width:46px;height:46px}.exercise .question-meta{flex-wrap:wrap;gap:10px}.exercise .answer-result{gap:12px;padding:14px}.answer-result>img{width:48px;height:48px}}.header-inner nav a{gap:12px}.header-inner nav [data-study-icon],.dashboard-metrics [data-study-icon]{flex-shrink:0}.completion-metrics [data-study-icon]{margin-bottom:10px}@media (width<=700px){.header-inner nav a{gap:6px}.header-inner nav [data-study-icon]{width:26px;height:26px}.learning-layout .header-inner nav a{padding:10px 6px}}@media (prefers-reduced-motion:reduce){.button,.path-step,.exercise .choice{transition:none}}.study-icon{object-fit:contain;flex-shrink:0;display:block}.learning-layout{--muted:#375f74}.learning-layout :is(.course-meta,.content-meta,.article-meta,.question-meta,.metric-label,.period-summary){color:#286581}.learning-layout :is(.course-category,.metric-label){font-weight:700}.analytics-consent[data-astro-cid-ju4pidww]{border:1px solid var(--line);background:var(--white);border-radius:10px;width:min(960px,100% - 32px);margin:20px auto;padding:20px;font-size:18px}.analytics-consent[data-astro-cid-ju4pidww][hidden]{display:none}.analytics-consent[data-astro-cid-ju4pidww] p[data-astro-cid-ju4pidww]{margin:12px 0}#analytics-consent-error[data-astro-cid-ju4pidww]:empty{display:none}#analytics-settings[data-astro-cid-ju4pidww]{background:0 0;border:0;padding:0;font-size:16px}
