:root{--ink:#1a1a1a;--ink-soft:#4a4a4a;--paper:#fdfcf9;--rule:#d9d4c7;--accent:#c0392b;--accent-2:#2c5f8a;--accent-3:#1a7a42;--highlight:#fdf3d0;--maxw:46rem;--touch-min:2.75rem;--serif:Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;--sans:"Gill Sans", "Segoe UI", system-ui, sans-serif;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--text-xs:.68rem;--text-sm:.9rem;--text-base:1rem;--text-lg:1.15rem;--text-xl:1.7rem;--leading-tight:1.25;--leading-snug:1.55;--icon-sm:7px;--icon-md:22px;--z-panel-head:1;--z-toast:40;--z-modal:50;--z-drawer-backdrop:55;--z-drawer:60}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;overscroll-behavior-y:none;scrollbar-gutter:stable}body{background:var(--paper);color:var(--ink);font-family:var(--serif);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:18px;font-weight:400;line-height:1.62}.column{max-width:var(--maxw);padding:0 var(--space-5);margin:0 auto}.section{margin:3.5rem 0}h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);font-weight:400;line-height:1.25}h1{letter-spacing:-.01em;margin:0 0 .4rem;font-size:2.4rem}h2{font-size:var(--text-xl);border-bottom:1px solid var(--rule);margin:2.8rem 0 1rem;padding-bottom:.35rem}h3{margin:2rem 0 .6rem;font-size:1.3rem}p{margin:0 0 1.15rem}a{color:var(--accent-2);border-bottom:1px solid #2c5f8a59;text-decoration:none;transition:border-color .15s,color .15s}a:hover{border-bottom-color:var(--accent-2)}hr{border:none;border-top:1px solid var(--rule);margin:2.5rem 0}blockquote{border-left:2px solid var(--rule);color:var(--ink-soft);margin:1.5rem 0;padding-left:1.25rem;font-style:italic}code{background:#0000000a;border-radius:3px;padding:.1em .35em;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.85em}pre{border:1px solid var(--rule);background:#0000000a;border-radius:4px;padding:1rem 1.15rem;font-size:.85rem;line-height:1.55;overflow-x:auto}pre code{background:0 0;padding:0}table{border-collapse:collapse;width:100%;margin:1.5rem 0;font-size:.95rem}th,td{text-align:left;border-bottom:1px solid var(--rule);padding:.5rem .75rem}th{font-family:var(--sans);text-transform:uppercase;letter-spacing:.1em;color:var(--ink-soft);font-size:.7rem}img{max-width:100%;height:auto}.kicker{font-family:var(--sans);text-transform:uppercase;letter-spacing:.16em;color:var(--accent);margin:0 0 .5rem;font-size:.72rem;font-weight:600;display:block}.eyebrow{font-family:var(--sans);text-transform:uppercase;letter-spacing:.16em;font-size:var(--text-xs);color:var(--ink-soft);font-weight:500}.lead{font-size:var(--text-lg);color:var(--ink-soft);line-height:1.55}.callout{background:var(--highlight);border-left:3px solid var(--accent);margin:1.75rem 0;padding:1rem 1.25rem}.callout>:last-child{margin-bottom:0}.aside{border-left:2px solid var(--rule);color:var(--ink-soft);margin:1.5rem 0;padding-left:1.1rem;font-size:.95rem}.btn{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;color:var(--accent);border:1px solid var(--rule);cursor:pointer;min-height:var(--touch-min);background:0 0;border-radius:3px;justify-content:center;align-items:center;gap:.4rem;padding:.5rem .95rem;font-size:.7rem;font-weight:600;line-height:1;text-decoration:none;transition:border-color .15s,background .15s,color .15s;display:inline-flex}.btn:hover:not(:disabled){border-color:var(--accent);background:#c0392b0d}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:focus-within{outline:2px solid var(--accent-2);outline-offset:2px}.btn--primary{background:var(--accent);color:var(--paper);border-color:var(--accent)}.btn--primary:hover:not(:disabled){background:#a83224;border-color:#a83224}.btn--ghost{color:var(--ink-soft);border-color:#0000}.btn--ghost:hover:not(:disabled){border-color:var(--rule);background:0 0}.btn--danger{color:var(--accent)}.btn--danger:hover:not(:disabled){border-color:var(--accent);background:#c0392b14}.btn--destructive{background:var(--accent);color:var(--paper);border-color:var(--accent)}.btn--destructive:hover:not(:disabled){background:#a83224;border-color:#a83224}.btn--sm{padding:.35rem .7rem;font-size:.64rem}.field{margin-bottom:1.25rem}.field label{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);color:var(--ink-soft);margin-bottom:.35rem;font-weight:600;display:block}.field .hint{font-family:var(--sans);font-size:var(--text-xs);letter-spacing:.02em;color:var(--ink-soft);text-transform:none;margin-top:.3rem;display:block}input[type=text],input[type=password],input[type=url],select{width:100%;font-family:var(--serif);font-size:var(--text-base);background:var(--paper);border:1px solid var(--rule);color:var(--ink);min-height:var(--touch-min);border-radius:3px;padding:.6rem .75rem}input:focus,select:focus{border-color:var(--accent-2);outline:none;box-shadow:0 0 0 2px #2c5f8a1f}.app-header{border-bottom:1px solid var(--rule);background:var(--paper)}.auth-warning-banner{border-bottom:1px solid var(--accent);color:var(--accent);font-family:var(--sans);font-size:var(--text-xs);letter-spacing:.06em;text-align:center;padding:.6rem max(1.5rem, env(safe-area-inset-right,0px)) .6rem max(1.5rem, env(safe-area-inset-left,0px));background:#c0392b14;font-weight:600}.announcement-banner{flex-direction:column;display:flex}.announcement{font-family:var(--sans);font-size:var(--text-sm);padding:.7rem max(1.5rem, env(safe-area-inset-right,0px)) .7rem max(1.5rem, env(safe-area-inset-left,0px));border-bottom:1px solid var(--rule);align-items:flex-start;gap:.6rem;line-height:1.4;display:flex}.announcement__icon{flex:none;margin-top:.15rem}.announcement__body{min-width:0}.announcement__title{margin:0;font-weight:600}.announcement__severity{text-transform:uppercase;letter-spacing:.06em;font-size:var(--text-xs)}.announcement__message{white-space:pre-wrap;overflow-wrap:anywhere;margin:.2rem 0 0}.announcement__link{font-size:var(--text-sm);margin:.25rem 0 0}.announcement--info{color:var(--accent-2);background:#2c5f8a12}.announcement--warning{background:var(--highlight);color:var(--ink)}.announcement--critical{color:var(--accent);background:#c0392b14}.app-header__inner{max-width:90rem;padding:max(1.1rem, env(safe-area-inset-top,0px)) max(1.5rem, env(safe-area-inset-right,0px)) 1.1rem max(1.5rem, env(safe-area-inset-left,0px));align-items:center;gap:var(--space-5);margin:0 auto;display:flex}.wordmark{font-family:var(--sans);text-transform:uppercase;letter-spacing:.2em;color:var(--accent);min-height:var(--touch-min);border:none;align-items:center;font-size:.8rem;font-weight:600;text-decoration:none;display:inline-flex}.wordmark:hover{border:none}.app-header__nav{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);flex:none;align-items:center;gap:1.25rem;display:flex}.app-header__nav a.is-active{color:var(--accent)}.app-header__nav a{color:var(--ink-soft);min-height:var(--touch-min);border:none;align-items:center;display:inline-flex}.app-header__nav a:hover{color:var(--accent)}.app-header__search-slot{flex:auto;justify-content:center;min-width:0;display:flex}.app-header__search{align-items:center;gap:var(--space-2);min-width:0;max-width:30rem;min-height:var(--touch-min);padding:0 var(--space-3);border:1px solid var(--rule);color:var(--ink-soft);text-transform:none;letter-spacing:normal;font-size:var(--text-sm);background:#1a1a1a05;border-radius:3px;flex:auto;text-decoration:none;display:inline-flex}.app-header__search:hover{color:var(--accent);border-color:var(--accent)}.app-header__search .nav-icon{flex:none;font-size:1rem}.app-header__search-label{text-overflow:ellipsis;white-space:nowrap;flex:auto;min-width:0;overflow:hidden}.app-header__search-hint{font-family:var(--sans);font-size:var(--text-xs);color:var(--ink-soft);border:1px solid var(--rule);padding:0 var(--space-1);border-radius:3px;flex:none;line-height:1.4}@media (hover:none),(pointer:coarse){.app-header__search-hint{display:none}}@media (width<=48rem){.app-header__inner{gap:var(--space-4)}.app-header__search-slot{flex:none}.app-header__search{width:var(--touch-min);min-width:var(--touch-min);flex:none;justify-content:center;padding:0}.app-header__search-label,.app-header__search-hint{display:none}}.app-main{padding:2rem 0 5rem}.badge{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;border:1px solid var(--rule);color:var(--ink-soft);white-space:nowrap;border-radius:999px;align-items:center;gap:.4rem;padding:.2rem .55rem;font-size:.62rem;font-weight:600;display:inline-flex}.badge__dot{width:var(--icon-sm);height:var(--icon-sm);background:currentColor;border-radius:50%;flex:none}.badge--ok{color:var(--accent-3);border-color:#1f8a4c66}.badge--error{color:var(--accent);cursor:help;border-color:#c0392b66}.badge--pending{color:var(--ink-soft)}.badge--syncing{color:var(--accent-2);border-color:#2c5f8a66}.badge--syncing .badge__dot{animation:1.1s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.25;transform:scale(.7)}}.repo-list{margin:0;padding:0;list-style:none}.repo-card{border:1px solid var(--rule);background:var(--paper);border-radius:5px;margin-bottom:1.25rem;padding:1.4rem 1.5rem;transition:border-color .15s}.repo-card:hover{border-color:#c9c3b2}.repo-card--disabled{opacity:.6}.repo-card__head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.repo-card__title{margin:0 0 .25rem;font-size:1.45rem}.repo-card__title a{color:var(--ink);border:none}.repo-card__title a:hover{color:var(--accent-2)}.repo-card__desc{color:var(--ink-soft);margin:.25rem 0 .9rem}.repo-card__meta{font-family:var(--sans);font-size:var(--text-xs);letter-spacing:.04em;color:var(--ink-soft);flex-wrap:wrap;gap:1.25rem;margin-bottom:1rem;display:flex}.repo-card__meta code{background:#0000000a;font-size:.72rem}.repo-card__actions{border-top:1px solid var(--rule);flex-wrap:wrap;align-items:center;gap:.5rem;padding-top:1rem;display:flex}.repo-card__error{background:var(--highlight);border-left:3px solid var(--accent);font-size:var(--text-sm);color:var(--ink);margin:.75rem 0 0;padding:.6rem .9rem}.toggle{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:.5rem;font-size:.64rem;font-weight:600;display:inline-flex}.toggle input{opacity:0;pointer-events:none;position:absolute}.toggle__track{background:var(--rule);border-radius:999px;flex:none;width:34px;height:18px;transition:background .15s;position:relative}.toggle__track:after{content:"";background:var(--paper);border-radius:50%;width:14px;height:14px;transition:transform .15s;position:absolute;top:2px;left:2px}.toggle input:checked+.toggle__track{background:var(--accent-3)}.toggle input:checked+.toggle__track:after{transform:translate(16px)}.toggle input:focus-visible+.toggle__track{box-shadow:0 0 0 2px #2c5f8a4d}.index-list{counter-reset:idx;margin:0;padding:0;list-style:none}.index-item{border-bottom:1px solid var(--rule);align-items:baseline;gap:1rem;padding:.85rem 0;display:flex}.index-item__num{font-family:var(--sans);font-size:var(--text-sm);color:var(--ink-soft);text-align:right;font-variant-numeric:tabular-nums;flex:none;min-width:2ch}.index-item__body{flex:1}.index-item__title{color:var(--ink);border:none;font-size:1.1rem}.index-item__title:hover{color:var(--accent-2)}.index-item__subtitle{color:var(--ink-soft);margin-top:.15rem;font-size:.92rem;display:block}.tabs{border-bottom:1px solid var(--rule);flex-wrap:wrap;gap:.25rem;margin:2rem 0 1.5rem;display:flex}.tab{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);color:var(--ink-soft);cursor:pointer;min-height:var(--touch-min);background:0 0;border:none;border-bottom:2px solid #0000;justify-content:center;align-items:center;margin-bottom:-1px;padding:.5rem .75rem;font-weight:600;display:inline-flex}.tab:hover{color:var(--accent)}.tab--active{color:var(--accent);border-bottom-color:var(--accent)}.reader-topbar{justify-content:space-between;align-items:center;gap:1rem;max-width:60rem;margin:0 auto 1.25rem;padding:0 1.5rem;display:flex}.reader-title{font-size:var(--text-xl);margin:.1rem 0 0}.reader-subtitle{margin:var(--space-1) 0 0}.anchor-target{background:var(--highlight);border-left:3px solid var(--accent);margin-left:-.9rem;padding-left:.6rem;scroll-margin-top:1.5rem;transition:background-color 1.2s ease-out}.reader-frame-wrap{max-width:60rem;margin:0 auto;padding:0 1.5rem}.reader-frame-toolbar{justify-content:flex-end;margin-bottom:.5rem;display:flex}.reader-frame-reload{border:1px solid var(--rule);color:inherit;cursor:pointer;background:0 0;border-radius:4px;padding:.25rem .75rem;font-size:.8rem}.reader-frame-reload:hover{background:var(--bg-subtle,#0000000a)}.lesson-diagnosis{border:1px solid var(--accent);background:var(--highlight);color:var(--ink);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-3);font-family:var(--sans);font-size:var(--text-sm);border-left-width:4px;border-radius:5px}.lesson-diagnosis__title{margin:0 0 var(--space-2);font-weight:700}.lesson-diagnosis__list{padding-left:var(--space-5);margin:0}.lesson-diagnosis__item{margin:var(--space-1) 0}.lesson-diagnosis__tag{font-weight:700;font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.02em;display:inline-block}.lesson-diagnosis__item--missing .lesson-diagnosis__tag{color:var(--accent-2)}.lesson-diagnosis__item--blocked .lesson-diagnosis__tag{color:var(--accent)}.lesson-diagnosis__csp{margin-top:var(--space-2);font-size:var(--text-xs)}.lesson-diagnosis__csp summary{cursor:pointer;color:var(--ink-soft)}.lesson-diagnosis__code{margin-top:var(--space-1);padding:var(--space-2);background:var(--paper);border:1px solid var(--rule);font-family:var(--mono,ui-monospace, monospace);font-size:var(--text-xs);white-space:pre-wrap;word-break:break-word;border-radius:4px;display:block;overflow-x:auto}.reader-frame{border:1px solid var(--rule);overscroll-behavior:contain;background:#fff;border-radius:5px;width:100%;height:78dvh;min-height:480px}.reader-nav{justify-content:space-between;gap:1rem;max-width:60rem;margin:1.5rem auto 0;padding:0 1.5rem;display:flex}.reader-nav__link{border:1px solid var(--rule);max-width:45%;color:var(--ink);border-radius:5px;padding:.75rem 1rem;text-decoration:none}.reader-nav__link:hover{border-color:var(--accent-2)}.reader-nav__link--next{text-align:right;margin-left:auto}.reader-nav__dir{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;color:var(--accent);margin-bottom:.2rem;font-size:.62rem;display:block}.reader-nav__title{color:var(--ink-soft);font-size:.95rem}.reader-layout{align-items:flex-start;gap:2.5rem;max-width:96rem;margin:0 auto;padding:0 1.5rem;display:flex}.reader-main{flex:auto;min-width:0}.course-nav{overscroll-behavior:contain;border-right:1px solid var(--rule);flex:none;align-self:flex-start;width:15rem;max-height:100dvh;padding:0 .5rem 2rem 0;position:sticky;top:0;overflow-y:auto}.course-nav.is-collapsed{display:none}.course-nav__head{z-index:var(--z-panel-head);padding:max(1.5rem, env(safe-area-inset-top,0px)) 0 .9rem;background:var(--paper);border-bottom:1px solid var(--rule);justify-content:space-between;align-items:flex-start;gap:.5rem;margin-bottom:1.1rem;display:flex;position:sticky;top:0}.course-nav__brand{flex-direction:column;gap:.15rem;display:flex}.course-nav__repo{font-family:var(--serif);font-size:var(--text-lg);color:var(--ink);min-height:var(--touch-min);border:none;align-items:center;margin-bottom:.35rem;line-height:1.2;display:flex}.course-nav__repo:hover{color:var(--accent-2)}.course-nav__collapse{font-family:var(--sans);font-size:var(--text-lg);color:var(--ink-soft);cursor:pointer;min-width:var(--touch-min);min-height:var(--touch-min);background:0 0;border:none;flex:none;justify-content:center;align-items:center;padding:.1rem .3rem;line-height:1;display:inline-flex}.course-nav__collapse:hover{color:var(--accent)}.course-nav__group{margin-bottom:1.5rem}.course-nav__group .kicker{margin-bottom:.4rem}.course-nav__list{margin:0;padding:0;list-style:none}.course-nav__item{font-family:var(--serif);color:var(--ink-soft);min-height:var(--touch-min);border:none;align-items:center;margin-bottom:.15rem;padding:.32rem 0;font-size:.98rem;line-height:1.35;display:flex}.course-nav__item:hover{color:var(--ink)}.course-nav__item.is-active{color:var(--accent)}.course-nav__open{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft);border:1px solid var(--rule);cursor:pointer;white-space:nowrap;min-height:var(--touch-min);background:0 0;border-radius:3px;flex:none;align-self:flex-start;padding:.5rem .6rem;font-size:.64rem;font-weight:600;display:none;position:sticky;top:1.5rem}.course-nav__open:hover{color:var(--accent);border-color:var(--accent)}.course-nav__open.is-shown{display:inline-flex}.course-nav__backdrop{display:none}.repo-switcher{overscroll-behavior:contain;border-left:1px solid var(--rule);flex:none;align-self:flex-start;width:13rem;max-height:100dvh;padding:0 0 2rem .5rem;position:sticky;top:0;overflow-y:auto}.repo-switcher.is-collapsed{display:none}.repo-switcher__head{z-index:var(--z-panel-head);padding:max(1.5rem, env(safe-area-inset-top,0px)) 0 .9rem;background:var(--paper);border-bottom:1px solid var(--rule);justify-content:space-between;align-items:baseline;gap:.5rem;margin-bottom:1.1rem;display:flex;position:sticky;top:0}.repo-switcher__head .kicker{margin:0}.repo-switcher__close{font-family:var(--sans);font-size:var(--text-lg);color:var(--ink-soft);cursor:pointer;min-width:var(--touch-min);min-height:var(--touch-min);background:0 0;border:none;flex:none;justify-content:center;align-items:center;padding:.1rem .3rem;line-height:1;display:inline-flex}.repo-switcher__close:hover{color:var(--accent)}.repo-switcher__note{font-size:var(--text-sm);margin:0}.repo-switcher__list{margin:0;padding:0;list-style:none}.repo-switcher__item{font-family:var(--serif);color:var(--ink-soft);min-height:var(--touch-min);border:none;align-items:center;gap:.55rem;margin-bottom:.15rem;padding:.34rem 0;font-size:.98rem;line-height:1.35;display:flex}.repo-switcher__item:hover{color:var(--ink)}.repo-switcher__item.is-active{color:var(--accent)}.repo-switcher__name{min-width:0}.repo-switcher__dot{width:var(--icon-sm);height:var(--icon-sm);background:currentColor;border-radius:50%;flex:none;align-self:center}.repo-switcher__dot.badge--syncing{animation:1.1s ease-in-out infinite pulse}.repo-switcher__open{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft);border:1px solid var(--rule);cursor:pointer;white-space:nowrap;min-height:var(--touch-min);background:0 0;border-radius:3px;flex:none;align-self:flex-start;padding:.5rem .6rem;font-size:.64rem;font-weight:600;display:none;position:sticky;top:1.5rem}.repo-switcher__open:hover{color:var(--accent);border-color:var(--accent)}.repo-switcher__open.is-shown{display:inline-flex}.repo-switcher__backdrop{display:none}@media (width<=68.6875rem){.reader-layout{flex-direction:column;gap:1rem}.course-nav__open,.course-nav__open.is-shown,.repo-switcher__open,.repo-switcher__open.is-shown{display:inline-flex;position:static}.course-nav{z-index:var(--z-drawer);background:var(--paper);border-right:1px solid var(--rule);width:17rem;max-width:82vw;max-height:none;padding:0 1.25rem max(1.5rem, env(safe-area-inset-bottom,0px)) max(1.25rem, env(safe-area-inset-left,0px));visibility:hidden;transition:transform .2s,visibility .2s;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);box-shadow:0 0 40px #0000001f}.course-nav.is-collapsed{display:block}.course-nav.is-open{visibility:visible;transform:translate(0)}.course-nav__backdrop{z-index:var(--z-drawer-backdrop);background:#1a1a1a59;display:block;position:fixed;inset:0}.repo-switcher{z-index:var(--z-drawer);background:var(--paper);border-left:1px solid var(--rule);width:15rem;max-width:82vw;height:auto;max-height:none;padding:0 max(1.25rem, env(safe-area-inset-right,0px)) max(1.5rem, env(safe-area-inset-bottom,0px)) 1.25rem;visibility:hidden;transition:transform .2s,visibility .2s;position:fixed;top:0;bottom:0;right:0;transform:translate(100%);box-shadow:0 0 40px #0000001f}.repo-switcher.is-collapsed{display:block}.repo-switcher.is-open{visibility:visible;transform:translate(0)}.repo-switcher__backdrop{z-index:var(--z-drawer-backdrop);background:#1a1a1a59;display:block;position:fixed;inset:0}.course-nav__open{order:-2;align-self:flex-start}.repo-switcher__open{order:-1;align-self:flex-end}}.nav-icon{vertical-align:-.125em;flex:none;width:1em;height:1em}.course-nav__open,.repo-switcher__open{align-items:center;gap:.4rem}a:focus-visible,button:focus-visible,.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.tab:focus-visible,.course-nav__open:focus-visible,.course-nav__collapse:focus-visible,.course-nav__repo:focus-visible,.course-nav__item:focus-visible,.repo-switcher__open:focus-visible,.repo-switcher__close:focus-visible,.repo-switcher__item:focus-visible,.reader-nav__link:focus-visible,.back-link:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px;border-radius:2px}.state{text-align:center;color:var(--ink-soft);padding:4rem 1.5rem}.state__title{color:var(--ink);margin:0 0 .5rem;font-size:1.3rem}.state--error .state__title{color:var(--accent)}.spinner{width:var(--icon-md);height:var(--icon-md);border:2px solid var(--rule);border-top-color:var(--accent);border-radius:50%;margin:0 auto 1rem;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.modal-backdrop{z-index:var(--z-modal);background:#1a1a1a59;justify-content:center;align-items:flex-start;padding:6vh 1.5rem 2rem;display:flex;position:fixed;inset:0}.modal{background:var(--paper);border:1px solid var(--rule);border-radius:6px;width:100%;max-width:34rem;padding:2rem 2.25rem 2.25rem;box-shadow:0 10px 40px #0000001f}.modal__title{margin:0 0 1.25rem;font-size:1.6rem}.modal__actions{justify-content:flex-end;gap:.6rem;margin-top:1.5rem;display:flex}.form-error{color:var(--accent);font-size:var(--text-sm);margin:0 0 1rem}.form-success{color:var(--accent-3);font-size:var(--text-sm);margin:0 0 1rem}.modal-tabs{border-bottom:1px solid var(--rule);flex-wrap:wrap;gap:.25rem;margin:0 0 1.5rem;display:flex}.modal-tab{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);color:var(--ink-soft);cursor:pointer;min-height:var(--touch-min);background:0 0;border:none;border-bottom:2px solid #0000;justify-content:center;align-items:center;margin-bottom:-1px;padding:.5rem .75rem;font-weight:600;display:inline-flex}.modal-tab:hover{color:var(--accent)}.modal-tab--active{color:var(--accent);border-bottom-color:var(--accent)}.modal-tab:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px;border-radius:2px}.dropzone{border:2px dashed var(--rule);text-align:center;box-sizing:border-box;border-radius:6px;flex-direction:column;align-items:center;gap:.6rem;width:100%;padding:1.5rem 1rem;transition:border-color .15s,background .15s;display:flex}.dropzone--active{border-color:var(--accent);background:#c0392b0d}.dropzone__hint{color:var(--ink-soft);font-size:var(--text-sm);margin:0}.dropzone__pick{cursor:pointer}.dropzone__file{font-family:var(--sans);font-size:var(--text-xs);color:var(--ink);word-break:break-all;max-width:100%;margin:0}.upload-progress{background:var(--rule);box-sizing:border-box;border-radius:3px;width:100%;height:.5rem;margin-bottom:.35rem;overflow:hidden}.upload-progress__bar{background:var(--accent);height:100%;transition:width .15s}.back-link{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);color:var(--ink-soft);border:none}.back-link:hover{color:var(--accent);border:none}.reader-topbar .back-link,.text-center .back-link{min-height:var(--touch-min);align-items:center;display:inline-flex}.muted{color:var(--ink-soft)}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.search-page__form{margin:var(--space-5) 0 var(--space-6)}.search-page__input{width:100%;max-width:100%;min-height:var(--touch-min);padding:var(--space-2) var(--space-4);font-family:var(--serif);font-size:var(--text-lg);appearance:none;background:var(--paper);border:1px solid var(--rule);color:var(--ink);border-radius:3px}.search-page__results{margin-top:var(--space-5)}.search-page__status{font-family:var(--sans);font-size:var(--text-xs);letter-spacing:.04em;margin:var(--space-4) 0 0;min-height:1.2em}.search-filters{gap:var(--space-5);margin:0 0 var(--space-4);padding-bottom:var(--space-4);border-bottom:1px solid var(--rule);flex-wrap:wrap;display:flex}.search-filters__group{border:none;min-width:0;margin:0;padding:0}.search-filters__legend{font-family:var(--sans);text-transform:uppercase;letter-spacing:.14em;font-size:var(--text-xs);color:var(--ink-soft);margin-bottom:var(--space-1);padding:0;font-weight:600}.search-filters__options{gap:var(--space-1) var(--space-3);flex-wrap:wrap;display:flex}.search-filters__option{align-items:center;gap:var(--space-2);min-height:var(--touch-min);font-family:var(--sans);font-size:var(--text-sm);color:var(--ink);cursor:pointer;-webkit-user-select:none;user-select:none;display:inline-flex}.search-filters__option input{cursor:pointer;width:auto;min-height:0;accent-color:var(--accent);margin:0}.search-filters__option span{overflow-wrap:anywhere;min-width:0}.search-filters__option--unavailable{color:var(--ink-soft);font-style:italic}.search-filters__reset{flex-basis:100%}.search-results{margin:0;padding:0;list-style:none}.search-hit{border-bottom:1px solid var(--rule)}.search-hit__link{gap:var(--space-1);padding:var(--space-4) var(--space-2);color:var(--ink);min-height:var(--touch-min);border:none;flex-direction:column;min-width:0;display:flex}.search-hit__link:hover{background:#00000005;border:none}.search-hit__head{justify-content:space-between;align-items:baseline;gap:var(--space-3);min-width:0;display:flex}.search-hit__project{font-family:var(--sans);text-transform:uppercase;letter-spacing:.12em;font-size:var(--text-xs);color:var(--ink-soft);text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.search-hit__kind{flex:none}.search-hit__title{font-size:var(--text-lg);color:var(--ink);line-height:var(--leading-tight);overflow-wrap:anywhere}.search-hit__link:hover .search-hit__title{color:var(--accent-2)}.search-hit__section{font-family:var(--sans);font-size:var(--text-sm);color:var(--ink-soft);overflow-wrap:anywhere}.search-hit__snippet{color:var(--ink-soft);font-size:var(--text-sm);line-height:var(--leading-snug);overflow-wrap:anywhere}.search-hit__mark{background:var(--highlight);color:inherit;border-radius:2px;padding:0 .1em;font-weight:700}.search-results__more{margin-top:var(--space-5);text-align:center}.search-page__results .btn,.search-filters__reset .btn{min-height:var(--touch-min)}.row-between{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;display:flex}.row-between--top{align-items:flex-start}.stack-sm>*+*{margin-top:.5rem}.mt-2{margin-top:var(--space-2)}.mt-4{margin-top:var(--space-4)}.mt-6{margin-top:var(--space-6)}.mb-5{margin-bottom:var(--space-5)}.mb-6{margin-bottom:var(--space-6)}.push-end{margin-left:auto}.text-center{text-align:center}.login-panel{text-align:center;max-width:24rem;margin:3rem auto 0}.login-panel__title{font-size:2rem}.login-panel .callout{text-align:left}.login-panel__actions{margin-top:var(--space-6);flex-wrap:wrap;justify-content:center;gap:.6rem;display:flex}.auth-form{text-align:left;margin-top:var(--space-6)}.auth-form .login-panel__title,.auth-form .lead{text-align:center}.login-panel__switch{margin-top:var(--space-6);font-family:var(--sans);font-size:var(--text-sm);color:var(--ink-soft)}.btn--link{min-height:0;color:var(--accent);font:inherit;cursor:pointer;background:0 0;border:none;padding:0;text-decoration:underline}.btn--link:hover:not(:disabled){color:var(--accent);background:0 0}@media (width<=34rem){body{font-size:17px}.repo-card__head{flex-direction:column}}.dialog__alert:empty{display:none}.confirm-dialog__message{color:var(--ink-soft);font-size:var(--text-base);margin:0}.toast-region{z-index:var(--z-toast);right:max(1.25rem, env(safe-area-inset-right,0px));bottom:max(1.25rem, env(safe-area-inset-bottom,0px));pointer-events:none;flex-direction:column;gap:.6rem;width:min(24rem,100vw - 2.5rem);display:flex;position:fixed;top:auto;left:auto}.toast-region__live{flex-direction:column;gap:.6rem;display:flex}.toast-region__live:empty{display:none}.toast{pointer-events:auto;background:var(--paper);border:1px solid var(--rule);border-left:3px solid var(--ink-soft);border-radius:5px;align-items:flex-start;gap:.75rem;padding:.85rem .95rem .85rem 1rem;animation:.18s ease-out toast-in;display:flex;box-shadow:0 8px 30px #00000024}.toast--error{border-left-color:var(--accent)}.toast--info{border-left-color:var(--accent-2)}.toast__message{color:var(--ink);flex:1;margin:0;font-size:.95rem;line-height:1.45}.toast__dismiss{cursor:pointer;color:var(--ink-soft);min-width:var(--touch-min);min-height:var(--touch-min);background:0 0;border:none;flex:none;justify-content:center;align-items:center;margin:-.25rem -.15rem 0 0;padding:0;display:inline-flex}.toast__dismiss:hover{color:var(--accent)}@keyframes toast-in{0%{opacity:0;transform:translateY(.5rem)}to{opacity:1;transform:translateY(0)}}@media (width<=34rem){.toast-region{left:max(1rem, env(safe-area-inset-left,0px));right:max(1rem, env(safe-area-inset-right,0px));width:auto}}@media (prefers-reduced-motion:reduce){.spinner,.badge--syncing .badge__dot,.repo-switcher__dot.badge--syncing{animation:none}.course-nav,.repo-switcher,.anchor-target{transition:none}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}