@font-face{font-family:Witlio Sans;src:url("./fonts/sans.woff2") format("woff2");font-weight:400 700;font-display:swap}
@font-face{font-family:Witlio Serif;src:url("./fonts/serif.woff2") format("woff2");font-weight:500;font-display:swap}
:root{--school-bg:#f7f6f0;--school-paper:#fffefa;--school-ink:#203b34;--school-primary:#244e42;--school-muted:#59675e;--school-line:#d9ded2;--school-tint:#edf1e7;--school-copper:#a54e35;--school-radius:8px;--school-sans:"Witlio Sans","Segoe UI",Arial,sans-serif;--school-serif:"Witlio Serif",Georgia,serif;--school-sidebar:240px;--school-header:72px}
.school-practice{font-family:var(--school-sans);font-size:16px;line-height:1.65;color:var(--school-ink);max-width:880px;margin:0 auto;padding:20px 0 48px;overflow-wrap:anywhere}
.school-practice *{box-sizing:border-box}.school-practice h1,.school-practice h2{font-family:var(--school-serif);font-weight:500;line-height:1.18;letter-spacing:-.035em}
.school-practice h1{font-size:clamp(32px,4vw,48px);margin:12px 0 18px}.school-practice h2{font-size:28px;margin:0 0 18px}.school-practice h3{font-size:17px;margin:0 0 12px}
.school-eyebrow{font:600 11px/1.5 var(--school-sans);letter-spacing:.14em;color:var(--school-copper)}
.school-lead{font-size:17px;color:var(--school-muted);max-width:65ch}
.school-practice-save{font-size:13px;padding:10px 13px;border-left:3px solid #8ca17d;background:var(--school-tint);margin:22px 0}
.school-practice-save[data-state=error]{background:#fff2e6;border-color:#a24d2e;color:#743b24}
.school-practice-progress{font-size:13px;color:var(--school-muted)}
.school-practice-card,.school-practice-report{padding:28px;background:var(--school-paper);border:1px solid var(--school-line);border-radius:var(--school-radius)}
.school-question{font-size:18px;line-height:1.7;white-space:pre-line}
.school-button{font:600 14px/1.35 var(--school-sans);display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:11px 17px;border:1px solid #b8c4b3;border-radius:6px;color:var(--school-primary);background:var(--school-paper);cursor:pointer;text-decoration:none}
.school-button:hover{background:var(--school-tint)}.school-button-primary{background:var(--school-primary);border-color:var(--school-primary);color:white}.school-button-primary:hover{background:#183f34}
.school-practice :is(button,input,select,a):focus-visible{outline:3px solid var(--school-copper);outline-offset:3px}
.school-answer-form{display:grid;gap:16px;margin:24px 0}.school-answer-form>.school-button{justify-self:start}
.school-field{display:grid;gap:7px;font-weight:600;font-size:14px}.school-field input,.school-field select{font:400 16px/1.5 var(--school-sans);color:var(--school-ink);background:white;border:1px solid #b8c4b3;border-radius:6px;min-height:46px;padding:10px 12px;width:100%;max-width:100%}
.school-options{padding:0;margin:0;border:0;display:grid;gap:10px;min-width:0}.school-option{display:flex;gap:12px;align-items:flex-start;min-height:48px;padding:13px 16px;border:1px solid var(--school-line);border-radius:6px;cursor:pointer;line-height:1.6;font-weight:400}
.school-option:has(input:checked){background:var(--school-tint);border-color:var(--school-primary)}.school-option input{flex:0 0 auto;width:18px;height:18px;min-height:0;margin:4px 0;accent-color:var(--school-primary)}
.school-feedback{padding:18px 20px;margin:20px 0;border-left:4px solid var(--school-copper);background:#f9f0e7;outline:0}.school-feedback[data-outcome=correct]{border-color:var(--school-primary);background:var(--school-tint)}.school-feedback p:last-child{margin-bottom:0}
.school-hints{margin-top:28px;padding-top:22px;border-top:1px solid var(--school-line)}.school-hints>.school-button{margin:5px 10px 5px 0}.school-hint,.school-solution{padding:15px 18px;background:var(--school-tint);border-radius:6px;margin:12px 0;white-space:pre-line}.school-hint p,.school-solution p{margin:6px 0 0}
.school-practice-actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.school-practice-result{border-top:1px solid var(--school-line);padding:18px 0}.school-source,.school-small{font-size:13px;line-height:1.65;color:var(--school-muted)}.school-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@media(max-width:600px){.school-practice{padding-top:10px}.school-practice-card,.school-practice-report{padding:20px 17px}.school-question{font-size:17px}.school-practice-actions>.school-button{flex:1 1 auto}.school-practice h2{font-size:25px}}
@media(prefers-reduced-motion:reduce){.school-practice *{scroll-behavior:auto!important;transition:none!important}}
@media print{.school-practice .school-button,.school-answer-form{display:none}.school-practice-card,.school-practice-report{border:0;padding:0}.school-practice{max-width:none;color:#000}}
body.school-app{font-family:var(--school-sans);background:var(--school-bg);color:var(--school-ink);--ink:var(--school-ink);--green:var(--school-primary);--blue:var(--school-primary);--dark:#183f38;--muted:var(--school-muted);--line:var(--school-line);--paper:var(--school-paper);--bg:var(--school-bg);--tint:var(--school-tint);--radius:var(--school-radius)}
body.school-app [data-school-replaced]{display:none!important}
body.school-app>a:is(.skip,.skip-link){display:none}
.school-skip{position:fixed;top:8px;left:12px;z-index:200;padding:12px 18px;background:var(--school-primary);color:white!important;transform:translateY(-150%);border-radius:6px}.school-skip:focus{transform:none}
body.school-app .school-workspace{margin-left:var(--school-sidebar)!important;width:auto;min-width:0;max-width:none;padding-top:var(--school-header);min-height:100vh}
body.school-app main.school-workspace{padding:calc(var(--school-header) + 32px) 36px 48px}
body.school-app .school-workspace :is(h1,h2){font-family:var(--school-serif);font-weight:500;letter-spacing:-.035em}
.school-chrome,.school-chrome *{box-sizing:border-box}.school-chrome{font:14px/1.5 var(--school-sans);color:var(--school-ink)}
.school-chrome a{text-decoration:none;color:inherit}.school-chrome button{font-family:var(--school-sans);cursor:pointer}
.school-chrome :is(a,button,input,summary):focus-visible{outline:3px solid var(--school-copper);outline-offset:3px}
.school-header{position:fixed;inset:0 0 auto;z-index:100;height:var(--school-header);display:flex;align-items:center;gap:22px;padding:0 28px 0 20px;border-bottom:1px solid var(--school-line);background:var(--school-paper)}
.school-brand{width:calc(var(--school-sidebar) - 20px);flex:0 0 auto;display:flex;align-items:center;gap:11px;min-height:48px}
.school-brand>img{width:34px;height:34px;object-fit:contain}.school-brand-text{display:grid;gap:1px}.school-brand-text strong{font:500 27px/1.05 var(--school-serif);letter-spacing:-.04em}.school-brand-text small{font:400 10px/1.4 var(--school-sans);color:var(--school-muted)}
.school-brand-symbol{display:grid;place-items:center;background:var(--school-primary);color:white;width:34px;height:34px;border-radius:7px;font-size:23px}
.school-shelf{display:flex;align-items:center;min-height:44px;white-space:nowrap;font-weight:600;font-size:12px}
.school-breadcrumb{font-size:12px;color:var(--school-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.school-search-button{display:flex;align-items:center;justify-content:flex-start;min-height:44px;max-width:320px;width:260px;margin-left:auto;padding:10px 16px;border:1px solid var(--school-line);border-radius:6px;background:var(--school-bg);color:var(--school-muted);font-size:13px;font-weight:400}
.school-search-button:before{content:"⌕";font-size:22px;line-height:1;margin-right:12px}.school-menu-button{display:none}
.school-sidebar{position:fixed;inset:var(--school-header) auto 0 0;width:var(--school-sidebar);z-index:90;display:flex;flex-direction:column;gap:22px;overflow:auto;background:#efefe6;border-right:1px solid var(--school-line);padding:25px 18px 20px}
.school-navigation{display:grid;gap:7px}.school-nav-single,.school-nav-group>summary{min-height:44px;display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;list-style:none}
.school-nav-group>summary::-webkit-details-marker{display:none}.school-nav-group>summary:after{content:"⌄";margin-left:auto;color:var(--school-muted)}.school-nav-group[open]>summary{background:#e2e8d9}
.school-nav-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;font-size:17px;color:var(--school-primary)}.school-nav-children{padding:4px 0 6px 19px;display:grid;gap:3px}
.school-nav-children a{display:flex;align-items:center;min-height:44px;padding:9px 11px;font-size:12px;color:var(--school-muted);border-left:2px solid transparent;border-radius:0 5px 5px 0}
.school-navigation a:hover{background:var(--school-tint)}.school-navigation a[aria-current=page]{background:#dfe7d5;color:var(--school-primary);border-left:2px solid var(--school-copper)}
.school-sidebar-foot{margin-top:auto;padding:18px 10px 0;border-top:1px solid var(--school-line)}.school-subject-links{display:flex;gap:8px;flex-wrap:wrap}.school-subject-links a{display:inline-flex;min-height:44px;align-items:center;font-size:12px;font-weight:600}.school-sidebar-note{font-size:11px;color:var(--school-muted);line-height:1.7;margin:10px 0 0}
.school-mobile-nav{display:none}.school-menu-dialog,.school-search-dialog{padding:24px;background:var(--school-paper);color:var(--school-ink);border:1px solid var(--school-line);border-radius:10px;font:14px/1.6 var(--school-sans)}
.school-menu-dialog::backdrop,.school-search-dialog::backdrop{background:rgba(17,37,30,.35)}
.school-menu-dialog{margin:0 0 0 auto;height:100dvh;max-height:100dvh;width:min(360px,100%);max-width:100%;border-radius:0;overflow-y:auto}
.school-menu-dialog .school-close{display:flex;margin-left:auto;margin-bottom:18px}.school-menu-dialog .school-sidebar-foot{margin-top:24px}.school-search-dialog{width:min(720px,calc(100% - 28px));max-height:85dvh}
.school-search-heading{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-bottom:24px}.school-search-heading h2{font:500 30px/1.2 var(--school-serif);margin:0}.school-search-dialog input{font:400 16px/1.5 var(--school-sans);width:100%;padding:12px;border:1px solid #b8c4b3;border-radius:6px;background:white;color:var(--school-ink)}
.school-search-results{display:grid;gap:8px}.school-search-result{display:grid;gap:4px;padding:14px 17px;border:1px solid var(--school-line);border-radius:6px;min-height:70px}.school-search-result:hover{background:var(--school-tint)}.school-search-result small{font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--school-copper)}.school-search-result strong{font-size:15px}.school-search-result span{font-size:12px;color:var(--school-muted)}
.school-local-tools{padding:15px 36px;border-bottom:1px solid var(--school-line);background:var(--school-paper);display:flex;justify-content:flex-end;gap:12px}.school-local-tools form{min-width:0;max-width:540px;width:100%;display:flex;align-items:center;gap:8px}.school-local-tools input{min-width:0;flex:1}.school-local-tools svg{width:20px;height:20px}
@media(max-width:1050px){.school-header{gap:16px;padding-right:20px}.school-breadcrumb{display:none}.school-search-button{width:210px}}
@media(max-width:900px){:root{--school-header:64px}.school-header{padding:0 16px;gap:12px}.school-brand{width:auto;margin-right:auto}.school-brand-text strong{font-size:25px}.school-brand-text small{display:none}.school-brand>img{width:30px;height:30px}.school-shelf{font-size:11px}.school-search-button{width:44px;min-width:44px;font-size:0;padding:10px;margin-left:0}.school-search-button:before{margin:0}.school-sidebar{display:none}.school-menu-button{display:none}body.school-app .school-workspace{margin-left:0!important;padding-bottom:80px}body.school-app main.school-workspace{padding:calc(var(--school-header) + 24px) 20px 90px}.school-mobile-nav{position:fixed;inset:auto 0 0;z-index:100;display:grid;grid-template-columns:repeat(4,1fr);min-height:66px;padding:5px 8px calc(5px + env(safe-area-inset-bottom));background:var(--school-paper);border-top:1px solid var(--school-line)}.school-mobile-nav>a,.school-mobile-nav>button{border:0;background:transparent;color:var(--school-muted);font:500 10px/1.3 var(--school-sans);min-height:54px;padding:5px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border-radius:6px;text-decoration:none}.school-mobile-nav [aria-current=page]{background:#e6eddc;color:var(--school-primary)}.school-mobile-icon{font-size:20px;line-height:1.1}.school-local-tools{padding:12px 20px}.school-search-dialog{padding:20px}.school-search-heading h2{font-size:26px}}
@media print{.school-chrome,.school-local-tools{display:none!important}body.school-app .school-workspace,body.school-app main.school-workspace{margin:0!important;padding:0!important;min-height:0}}