:root{--green:#0f6e57;--mint:#e0f6f1;--rail:#0f6e57;--rail-ink:#e0f6f1;--rail-dim:#e0f6f1ad;--rail-line:#e0f6f12e;--bg:#f7faf9;--surface:#fff;--soft:#eaf4f0;--ink:#12241f;--muted:#53685f;--line:#d3e2dc;--accent:#0f6e57;--accent-ink:#fff;--done:#0f6e57;--todo:#cfded8;--bad:#a3392b;--bad-soft:#f9e6e2;--font:"Schibsted Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;--measure:66ch;--r:4px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root{--rail:#0c4e3f;--bg:#0b1613;--surface:#10201c;--soft:#142b25;--ink:#e2efea;--muted:#93aca3;--line:#23403a;--accent:#6fd2b3;--accent-ink:#0b1613;--done:#6fd2b3;--todo:#2a4740;--bad:#f0907f;--bad-soft:#3a1d18;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;height:100%}body{background:var(--bg);min-height:100%;color:var(--ink);font-family:var(--font);margin:0;font-size:1.0625rem;line-height:1.6}a{color:var(--accent);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}img{max-width:100%;height:auto}h1,h2,h3{letter-spacing:-.015em;margin:0 0 .5rem;font-weight:800;line-height:1.15}h1{font-size:clamp(2rem,1.6rem + 1.6vw,2.75rem)}h2{letter-spacing:-.01em;font-size:1.35rem}h3{font-size:1.1rem}p{margin:0 0 1rem}.muted{color:var(--muted)}.small{font-size:.9rem}.lede{color:var(--muted);max-width:52ch;font-size:1.15rem}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.shell{grid-template-columns:248px 1fr;min-height:100vh;display:grid}.content{flex-direction:column;min-width:0;display:flex}.page{flex:1;width:100%;max-width:880px;padding:3.5rem 3rem 5rem}.rail{background:var(--rail);height:100vh;color:var(--rail-ink);flex-direction:column;gap:2.5rem;padding:2rem 1.5rem 1.5rem;display:flex;position:sticky;top:0}.wordmark{color:var(--rail-ink);letter-spacing:-.01em;align-items:center;gap:.8rem;font-size:1.3rem;font-weight:800;line-height:1;text-decoration:none;display:flex}.wordmark small{color:var(--rail-dim);letter-spacing:0;margin-top:.3rem;font-size:.95rem;font-weight:500;display:block}.rail-nav{flex-direction:column;gap:.15rem;display:flex}.rail-nav a{border-radius:var(--r);color:var(--rail-dim);margin:0 -.75rem;padding:.5rem .75rem;font-weight:500;text-decoration:none;display:block}.rail-nav a:hover{color:var(--rail-ink);background:var(--rail-line)}.rail-nav a[aria-current=page]{color:var(--rail);background:var(--rail-ink);font-weight:700}.rail-nav a:focus-visible{outline-color:var(--rail-ink)}.rail-user{border-top:1px solid var(--rail-line);margin-top:auto;padding-top:1.25rem;font-size:.92rem}.rail-name{margin:0;font-weight:700}.rail-roles{color:var(--rail-dim);margin:0 0 .75rem}.rail-signout{font:inherit;color:var(--rail-ink);border:1px solid var(--rail-line);border-radius:var(--r);cursor:pointer;background:0 0;padding:.3rem .8rem;font-size:.9rem}.rail-signout:hover{background:var(--rail-line)}.site-footer{padding:1.5rem 3rem 2rem;padding-bottom:calc(2rem + env(safe-area-inset-bottom,0px));color:var(--muted);font-size:.88rem}@media (max-width:860px){.shell{grid-template-columns:1fr}.rail{height:auto;padding:calc(1rem + env(safe-area-inset-top,0px)) 1.25rem .9rem;flex-flow:wrap;align-items:center;gap:.75rem 1.25rem;position:static}.wordmark{font-size:1.1rem}.wordmark small{margin:0 0 0 .35rem;display:inline}.wordmark svg{width:24px;height:auto}.rail-nav{flex-direction:row;order:3;gap:.25rem;width:calc(100% + 2.5rem);margin:0 -1.25rem;padding:0 1.25rem;overflow-x:auto}.rail-nav a{white-space:nowrap;margin:0;padding:.4rem .7rem}.rail-user{border:0;align-items:center;gap:.75rem;margin:0 0 0 auto;padding:0;display:flex}.rail-roles{display:none}.rail-name{font-weight:500}.page{padding:2rem 1.25rem 4rem}.site-footer{padding:1.5rem 1.25rem 2rem}}.btn{border-radius:var(--r);border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:inherit;cursor:pointer;align-items:center;gap:.6rem;padding:.7rem 1.2rem;font-weight:700;text-decoration:none;display:inline-flex}.btn:hover{filter:brightness(1.1)}.btn:disabled{opacity:.5;cursor:not-allowed;filter:none}.btn.secondary{color:var(--ink);border-color:var(--line);background:0 0}.btn.secondary:hover{background:var(--soft);filter:none}.btn.small{padding:.3rem .75rem;font-size:.9rem}.btn.danger{color:var(--bad);border-color:var(--bad);background:0 0}.btn.danger:hover{background:var(--bad-soft);filter:none}.page-head{margin-bottom:2.75rem}.crumbs{color:var(--muted);margin-bottom:1.5rem;font-size:.92rem}.crumbs a{color:var(--muted)}.courses{border-top:2px solid var(--ink);margin:0;padding:0;list-style:none}.course{border-bottom:1px solid var(--line);grid-template-columns:1fr 12rem;gap:.5rem 2.5rem;padding:1.6rem 0;display:grid}.course h2{margin-bottom:.3rem;font-size:1.3rem}.course h2 a{color:var(--ink);text-decoration:none}.course h2 a:hover{text-decoration:underline}.course p{color:var(--muted);max-width:52ch;margin:0}.course-status{color:var(--muted);font-size:.92rem}.course-status strong{color:var(--ink);margin-bottom:.45rem;font-weight:700;display:block}.course-status.certified strong{color:var(--done)}.ticks{gap:3px;display:flex}.ticks span{background:var(--todo);flex:1;height:6px}.ticks span.on{background:var(--done)}.ticks span.quiz{flex:0 0 14px}@media (max-width:640px){.course{grid-template-columns:1fr}}.course-actions{flex-wrap:wrap;align-items:center;gap:1.25rem;margin:1.5rem 0 3rem;display:flex}.sequence{border-top:2px solid var(--ink);max-width:var(--measure);margin:0;padding:0;list-style:none}.sequence li{border-bottom:1px solid var(--line);grid-template-columns:3rem 1fr auto;align-items:baseline;gap:1rem;padding:1.1rem 0;display:grid}.sequence .n{color:var(--muted);font-variant-numeric:tabular-nums;font-size:1.1rem;font-weight:800}.sequence a,.sequence .locked-title{font-size:1.08rem;font-weight:700}.sequence .locked-title{color:var(--muted)}.sequence .meta{color:var(--muted);font-size:.9rem;display:block}.sequence .state{color:var(--muted);white-space:nowrap;font-size:.9rem}.sequence li.complete .n,.sequence li.complete .state{color:var(--done);font-weight:700}.lesson-body{max-width:var(--measure);font-size:1.1rem;line-height:1.7}.lesson-body h2{margin-top:2.5rem}.lesson-body ul,.lesson-body ol{padding-left:1.3rem}.lesson-body li{margin-bottom:.4rem}.lesson-body code{background:var(--soft);border-radius:3px;padding:.1em .35em;font-size:.9em}.lesson-body pre{background:var(--soft);border-radius:var(--r);padding:1rem 1.2rem;overflow-x:auto}.lesson-body pre code{background:0 0;padding:0}.lesson-body blockquote{border-left:3px solid var(--line);color:var(--muted);margin:1.5rem 0;padding-left:1.25rem}.table-wrap{margin:1.5rem 0;overflow-x:auto}.lesson-body table{border-collapse:collapse;width:100%;font-size:1rem}.lesson-body th{text-align:left;border-bottom:2px solid var(--ink);padding:.5rem 1rem .5rem 0}.lesson-body td{border-bottom:1px solid var(--line);padding:.55rem 1rem .55rem 0}.callout{background:var(--soft);border-radius:var(--r);margin:1.75rem 0;padding:1rem 1.25rem}.callout.warning{background:var(--bad-soft)}.callout>:last-child{margin-bottom:0}.callout-title{margin-bottom:.2rem;display:block}.callout.warning .callout-title{color:var(--bad)}.lesson-footer{max-width:var(--measure);border-top:2px solid var(--ink);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem 2rem;margin-top:3.5rem;padding-top:1.5rem;display:flex}.done-note{color:var(--done);font-weight:700}.quiz{max-width:var(--measure)}.question{border:0;border-top:1px solid var(--line);margin:0;padding:1.5rem 0 1.25rem}.question:first-of-type{border-top:2px solid var(--ink)}.question legend{float:left;width:100%;margin-bottom:.75rem;padding:0;font-size:1.1rem;font-weight:700}.question legend+*{clear:both}.option{border-radius:var(--r);cursor:pointer;align-items:flex-start;gap:.75rem;margin:0 -.6rem;padding:.45rem .6rem;display:flex}.option:hover{background:var(--soft)}.option input{accent-color:var(--accent);width:1.05rem;height:1.05rem;margin-top:.4rem}.feedback{margin:.75rem 0 0;font-size:.95rem}.feedback.correct{color:var(--done)}.feedback.wrong{color:var(--bad)}.quiz form>.btn{margin-top:1.5rem}.result{border-top:4px solid var(--done);margin-bottom:1.5rem;padding:1.5rem 0}.result.fail{border-top-color:var(--bad)}.result h2{font-size:1.6rem}.record{border-top:4px solid var(--done);max-width:720px;padding-top:2rem}.record.revoked,.record.not_found{border-top-color:var(--bad)}.record-head{align-items:center;gap:1.5rem;margin-bottom:1.75rem;display:flex}.record-head svg{flex:none}.record-head h1{margin:0}.record-head p{color:var(--muted);margin:.35rem 0 0}.record dl{border-top:1px solid var(--line);grid-template-columns:9rem 1fr;margin:0;display:grid}.record dt,.record dd{border-bottom:1px solid var(--line);margin:0;padding:.75rem 0}.record dt{color:var(--muted)}.record dd{font-weight:700}.record .code{font-variant-numeric:tabular-nums;letter-spacing:.04em}@media (max-width:520px){.record dl{grid-template-columns:1fr}.record dt{border-bottom:0;padding-bottom:0}}.cert-preview{border:1px solid var(--line);max-width:720px;margin-top:2.5rem;display:block}.verify-form{flex-wrap:wrap;gap:.75rem;margin:2rem 0;display:flex}.code-input{font:inherit;letter-spacing:.06em;text-transform:uppercase;border:2px solid var(--ink);border-radius:var(--r);background:var(--surface);width:100%;max-width:17rem;color:var(--ink);padding:.55rem .9rem;font-size:1.3rem;font-weight:700}.code-input::placeholder{color:var(--todo)}.data-table{border-collapse:collapse;width:100%;font-size:.95rem}.data-table th{text-align:left;border-bottom:2px solid var(--ink);white-space:nowrap;padding:.6rem 1rem .6rem 0}.data-table td{border-bottom:1px solid var(--line);vertical-align:top;padding:.7rem 1rem .7rem 0}.status{font-weight:700}.status.valid{color:var(--done)}.status.revoked{color:var(--bad)}section+section{margin-top:3.5rem}.signin{max-width:30rem;padding-top:2rem}.signin .btn{margin-top:.75rem}.error-box{background:var(--bad-soft);color:var(--bad);border-radius:var(--r);margin-bottom:1.25rem;padding:.8rem 1rem}.bad-text{color:var(--bad)}.strong{font-weight:700}.nowrap{white-space:nowrap}.code{font-variant-numeric:tabular-nums;letter-spacing:.03em;white-space:nowrap}.meta{color:var(--muted);font-size:.86rem;font-weight:400;display:block}td .meta.status{font-weight:700}.is-faded{opacity:.55}.section-title{color:var(--muted);letter-spacing:0;margin:0 0 .75rem;font-size:1rem;font-weight:700}section+section,.announcements+section{margin-top:3rem}.course-status.tone-done strong{color:var(--done)}.course-status.tone-bad strong{color:var(--bad)}.course-status.tone-warn strong{color:var(--ink)}.course-status.tone-muted strong{color:var(--muted);font-weight:500}.course.is-locked h2 a{color:var(--muted)}.announcements{gap:1rem;margin-bottom:3rem;display:grid}.announcement{background:var(--soft);border-left:4px solid var(--accent);border-radius:0 var(--r) var(--r) 0;padding:1.1rem 1.35rem}.announcement h2{margin-bottom:.3rem;font-size:1.1rem}.announcement p{white-space:pre-line;max-width:var(--measure);margin:0 0 .4rem}.announcement p:last-child{margin:0}.facts{color:var(--muted);flex-wrap:wrap;gap:.25rem 1.5rem;margin:0 0 .5rem;padding:0;font-size:.95rem;list-style:none;display:flex}.facts li.bad{color:var(--bad);font-weight:700}.notice{background:var(--soft);border-radius:var(--r);max-width:var(--measure);margin:1.5rem 0 3rem;padding:1.1rem 1.35rem}.notice p{margin:0 0 .4rem}.notice ul{margin:0;padding-left:1.2rem}.sequence.is-locked{opacity:.7}.lesson-extras{max-width:var(--measure);gap:2rem;margin-top:3rem;display:grid}.notes-box label{margin-bottom:.5rem;display:block}textarea,input[type=search],.stack-form input,.stack-form select{width:100%;font:inherit;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);color:var(--ink);padding:.65rem .8rem;font-size:1rem;line-height:1.5}textarea:focus,input:focus,select:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}textarea{resize:vertical}.notes-box p{min-height:1.4em;margin:.35rem 0 0}.feedback-box{border-top:1px solid var(--line);padding-top:1.5rem}.feedback-box p{margin:0 0 .6rem}.choice{gap:.5rem;display:flex}.feedback-comment{justify-items:start;gap:.5rem;margin-top:1rem;display:grid}.search-form{gap:.75rem;max-width:40rem;margin:1.5rem 0 2rem;display:flex}.search-form input{border:2px solid var(--ink);flex:1;font-size:1.1rem}.results{border-top:2px solid var(--ink);max-width:var(--measure);margin:0;padding:0;list-style:none}.results li{border-bottom:1px solid var(--line);padding:1.1rem 0}.results a{font-size:1.08rem;font-weight:700}.results p{color:var(--muted);margin:.4rem 0 0}.results .note-body{color:var(--ink);white-space:pre-line}.results .btn{margin-top:.75rem}mark{background:var(--soft);color:inherit;box-shadow:0 2px 0 var(--accent);padding:0 1px}.admin h1{margin-bottom:1.25rem}.page:has(.admin){max-width:1100px}.tabs{border-bottom:2px solid var(--ink);flex-wrap:wrap;gap:.25rem;margin-bottom:2rem;display:flex}.tabs a{color:var(--muted);border-bottom:3px solid #0000;margin-bottom:-2px;padding:.55rem .9rem;font-weight:500;text-decoration:none}.tabs a:hover{color:var(--ink)}.tabs a[aria-current=page]{color:var(--ink);border-bottom-color:var(--accent);font-weight:700}.admin h3{margin:0 0 .75rem;font-size:1.1rem}.admin .person{font-size:1.6rem}.stat-line{flex-wrap:wrap;gap:.5rem 2.5rem;margin-bottom:1rem;display:flex}.stat-line p{color:var(--muted);margin:0}.stat-line strong{color:var(--ink);margin-right:.3rem;font-size:1.4rem}.stat-line .bad-text strong{color:var(--bad)}.stack-form{gap:1rem;max-width:36rem;margin-bottom:3rem;display:grid}.stack-form label{gap:.35rem;font-size:.95rem;font-weight:700;display:grid}.stack-form select{max-width:16rem}