:root{--bg:#f8f6ef;--surface:#ffffff;--ink:#1f2a24;--muted:#4b5850;--accent:#c2412d;--accent-ink:#ffffff;--accent2:#2e4b3c;--line:#dcd6c4;--hero-ink:#f4f1e6;--r:14px;--maxw:1180px;--measure:66ch;--hf:'Itim', 'Comic Sans MS', cursive;--bf:'Outfit', system-ui, 'Segoe UI', sans-serif}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--bf)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.18em}
h1,h2,h3,h4{font-family:var(--hf);line-height:1.18;margin:1.6em 0 .5em;font-weight:400;letter-spacing:0}
h1{font-size:clamp(2rem,5vw,3.4rem);margin-top:0}
h2{font-size:clamp(1.4rem,3vw,2rem)}h3{font-size:1.2rem}
p,ul,ol,table,details{margin:0 0 1.1em}
.wrap{max-width:max(var(--maxw),min(88vw,1760px));margin:0 auto;padding:0 20px}
@media(min-width:1800px){body article.prose>:is(p,ul,ol,h2,h3,h4,blockquote,dl,details,.callout,.disclosure,.table-wrap){max-width:52rem}}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:var(--surface);padding:8px;z-index:9}
header.site{border-bottom:1px solid var(--line);background:var(--surface)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{font-family:var(--hf);font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.brand svg{flex:none}
nav.main ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px 18px;margin:0;padding:0}
nav.main a{color:var(--ink);text-decoration:none;font-size:.95rem;padding:4px 0;border-bottom:2px solid transparent}
nav.main a[aria-current]{border-color:var(--accent)}
.menu-btn{display:none}
@media(max-width:760px){.menu-btn{display:inline-block;background:none;border:1px solid var(--line);color:var(--ink);border-radius:var(--r);padding:6px 12px;font:inherit}
nav.main{width:100%;display:none}nav.main.open{display:block}nav.main ul{flex-direction:column;gap:6px}}
.hero{position:relative;overflow:hidden}
.hero .wrap{padding-top:56px;padding-bottom:56px}
.hero .lead{font-size:1.18rem;color:var(--muted);max-width:60ch}
.hero.full{color:var(--hero-ink);min-height:440px;display:flex;align-items:flex-end}
.hero.full img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero.full::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.62))}
.hero.full .wrap{position:relative;z-index:1;width:100%}.hero.full .lead{color:inherit;opacity:.92}
.hero.split .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero.split img{border-radius:var(--r);aspect-ratio:4/3;object-fit:cover;width:100%}
.hero.banner img{width:100%;max-height:380px;object-fit:cover;border-radius:var(--r);margin-top:28px}
.hero.plain{background:var(--surface);border-bottom:1px solid var(--line)}
@media(max-width:760px){.hero.split .wrap{grid-template-columns:1fr}.hero.full{min-height:340px}.hero .wrap{padding-top:36px;padding-bottom:36px}}
.page{display:grid;gap:48px;padding-top:40px;padding-bottom:64px}
.page.toc-layout{grid-template-columns:220px minmax(0,1fr)}
.page.toc-layout .toc{position:sticky;top:20px;align-self:start;font-size:.92rem;border-left:3px solid var(--accent);padding-left:14px}
.page.toc-layout .toc ul{list-style:none;padding:0;margin:0}.page.toc-layout .toc li{margin:.35em 0}
.page.toc-layout .toc a{color:var(--muted);text-decoration:none}
@media(max-width:860px){.page.toc-layout{grid-template-columns:1fr}.page.toc-layout .toc{position:static}}
/* Content uses the full container width (cards, grids, tables); only running text keeps a readable measure. */
article.prose{max-width:none;min-width:0}
article.prose>:is(p,ul,ol,h2,h3,h4,blockquote,dl,details,.callout,.disclosure,.table-wrap){max-width:47.5rem;margin-left:auto;margin-right:auto}
.page.toc-layout article.prose>*{margin-left:0;margin-right:0}
/* A heading that introduces a full-width block (cards, grid, table) lines up with that block, not the text column. */
body article.prose>:is(h2,h3):has(+ :is(.cards,nav,div,table,section,ul.grid)){max-width:none;margin-left:0;margin-right:0}
.page.wide article.prose>*{max-width:none}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:0 0 1.4em}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.card h3{margin-top:0}.card p:last-child{margin-bottom:0}
a.card{display:block;color:var(--ink);text-decoration:none}a.card:hover{border-color:var(--accent)}
.callout{border-left:4px solid var(--accent2);background:var(--surface);padding:14px 18px;border-radius:0 var(--r) var(--r) 0;margin:0 0 1.2em}
.table-wrap{overflow-x:auto;margin:0 0 1.2em}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
th{font-family:var(--hf);background:var(--surface)}
details{border:1px solid var(--line);border-radius:var(--r);padding:10px 16px;background:var(--surface)}
summary{cursor:pointer;font-weight:600}
.steps{counter-reset:s;list-style:none;padding:0}.steps li{counter-increment:s;position:relative;padding-left:44px;margin-bottom:1em}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-weight:700;font-size:.9rem}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:10px 18px;border-radius:var(--r);text-decoration:none;font-weight:600;border:0;font:inherit;cursor:pointer}
.aff{border:1px dashed var(--accent);border-radius:var(--r);padding:16px 18px;margin:0 0 1.2em;background:var(--surface)}
.aff .tag{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.disclosure{font-size:.88rem;color:var(--muted);border:1px solid var(--line);border-radius:var(--r);padding:10px 14px;margin:0 0 1.6em}
.meta{font-size:.88rem;color:var(--muted)}
dl dt{font-family:var(--hf);font-weight:700;margin-top:1em}dl dd{margin:.2em 0 0 0;color:var(--ink)}
footer.site{border-top:1px solid var(--line);background:var(--surface);font-size:.92rem;color:var(--muted)}
footer.site .wrap{padding-top:32px;padding-bottom:32px;display:grid;gap:18px}
footer.site ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px 18px}
footer.site a{color:var(--muted)}
.ks{font-size:17.5px}
.ks h1,.ks h2,.ks h3{font-weight:400}
.ks header.site{background:#f8f6ef;border-bottom:0;box-shadow:inset 0 -5px 0 #e8604c}
.ks header.site .wrap{padding-top:14px;padding-bottom:18px}
.ks .brand{color:#2e4b3c;font-weight:400;font-size:1.55rem}
.ks nav.main a{font-weight:500;font-size:.96rem;color:#2b3a32;padding:5px 12px;border:2px solid transparent;border-radius:999px}
.ks nav.main a:hover{background:#fff;border-color:#dcd6c4}
.ks nav.main a[aria-current]{background:#2e4b3c;border-color:#2e4b3c;color:#f4f1e6}
.ks nav.main ul{gap:6px 6px}
/* Chalkboard hero: green board, smudges, wooden frame and a chalk ledge */
.ks .hero.plain{background:#f8f6ef;border-bottom:0;padding:26px 0 8px}
.ks .hero.plain .wrap{position:relative;background-color:#2e4b3c;background-image:radial-gradient(ellipse at 18% 30%,rgba(255,255,255,.07),transparent 45%),radial-gradient(ellipse at 78% 70%,rgba(255,255,255,.06),transparent 40%),radial-gradient(ellipse at 55% 10%,rgba(0,0,0,.12),transparent 50%);border:14px solid #b07a43;border-radius:10px;box-shadow:inset 0 0 0 2px #8c5d31,inset 0 0 40px rgba(0,0,0,.28),0 10px 0 #8c5d31;color:#f4f1e6;padding:44px clamp(22px,4vw,56px) 50px;margin-bottom:24px;max-width:calc(max(var(--maxw),min(88vw,1760px)) - 40px)}
.ks .hero.plain .wrap::after{content:"";position:absolute;left:12%;bottom:-24px;width:min(220px,30%);height:9px;border-radius:3px;background:linear-gradient(90deg,#f4f1e6 0 22%,transparent 22% 30%,#ff8a76 30% 50%,transparent 50% 58%,#ffd36e 58% 74%,transparent 74% 82%,#9fd8c0 82%)}
.ks .hero .kicker{display:inline-block;margin:0 0 .9em;font-size:.8rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#1f2a24;background:#ff8a76;padding:4px 12px;border-radius:999px}
.ks .hero h1{color:#f4f1e6;text-shadow:0 0 1px rgba(244,241,230,.6);max-width:22ch;line-height:1.12}
.ks .hero .lead{color:#dfe8e1;max-width:58ch}
.ks .hero .lead a{color:#ffd36e}
.ks .hero.plain .wrap:has(.art){display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);grid-template-rows:1fr auto auto auto 1fr;column-gap:56px}
.ks .hero.plain .wrap:has(.art)>:not(.art){grid-column:1}
.ks .hero.plain .wrap:has(.art)>.kicker{grid-row:2;justify-self:start}.ks .hero.plain .wrap:has(.art)>h1{grid-row:3}.ks .hero.plain .wrap:has(.art)>.lead{grid-row:4}
.ks .hero.plain .art{grid-column:2;grid-row:1/6;align-self:center}
.ks .art .chalk-art{width:100%;height:auto;display:block;max-height:380px}
.ks .art img{border-radius:6px;border:6px solid #f4f1e6;transform:rotate(1.5deg);box-shadow:0 10px 24px rgba(0,0,0,.35);aspect-ratio:4/3;object-fit:cover;width:100%}
@media(max-width:860px){.ks .hero.plain .wrap:has(.art){grid-template-columns:1fr;grid-template-rows:none}.ks .hero.plain .wrap:has(.art)>*{grid-row:auto!important}.ks .hero.plain .art{grid-column:1;margin-top:20px;max-width:440px}}
@media(max-width:760px){.ks .hero.plain{padding-top:16px}.ks .hero.plain .wrap{border-width:10px;margin-left:12px;margin-right:12px;padding:30px 20px 36px;max-width:none}.ks .brand{font-size:1.3rem}}
/* Body */
.ks .prose h2{color:#2e4b3c;font-size:clamp(1.45rem,2.8vw,2rem);padding-bottom:.35em;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='8' viewBox='0 0 60 8'%3E%3Cpath d='M2 4q7-4 14 0t14 0 14 0 14 0' fill='none' stroke='%23e8604c' stroke-width='2.6' stroke-linecap='round'/%3E%3C/svg%3E") left bottom/120px 8px no-repeat}
.ks .prose h3{color:#a33523}
.ks .cards{gap:20px}
.ks .card{background:#fff;border:2px solid #2e4b3c;border-radius:16px 16px 16px 4px;padding:20px 22px;box-shadow:5px 5px 0 #c9dccf}
.ks .card h3{margin:0 0 .4em;color:#2e4b3c;font-size:1.25rem}
.ks a.card{transition:transform .15s,box-shadow .15s}
.ks a.card:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 #ff8a76;border-color:#c2412d}
.ks .callout{background:#fff3ef;border:2px dashed #e8604c;border-left-width:2px;border-radius:14px;padding:16px 22px}
.ks .callout.safe::before{content:"Safety note";display:block;font-family:var(--hf);color:#a33523;font-size:1.1rem;margin-bottom:.2em}
.ks th{font-family:var(--hf);font-weight:400;background:#2e4b3c;color:#f4f1e6;font-size:1rem}
.ks .table-wrap{border:2px solid #2e4b3c;border-radius:14px;background:#fff}
.ks tbody tr:nth-child(even) td{background:#f3f6f1}
.ks details{background:#fff;border:2px solid #dcd6c4;border-radius:14px}
.ks summary{color:#2e4b3c}
.ks .steps li::before{background:#2e4b3c;color:#f4f1e6;font-family:var(--hf);font-weight:400;border-radius:8px;box-shadow:2px 2px 0 #e8604c}
.ks footer.site{background:#2e4b3c;color:#dfe8e1;border-top:10px solid #b07a43}
.ks footer.site a{color:#ffd36e}
.ks figure.ph{margin:0 0 1.6em}.ks figure.ph img{border-radius:12px;border:10px solid #b07a43;aspect-ratio:16/8;object-fit:cover;width:100%}
.ks figure.ph figcaption{font-size:.88rem;color:var(--muted);margin-top:.6em}
/* Age tabs */
.ks .page{padding-top:28px}
.ks article.prose>:first-child,.ks article.prose>.agetabs+h2{margin-top:0}
.ks article.prose>:is(.filters,.agetabs){max-width:47.5rem;margin-left:auto;margin-right:auto}
@media(min-width:1800px){.ks article.prose>:is(.filters,.agetabs){max-width:52rem}}
@media(min-width:2300px){.ks .wrap{max-width:min(90vw,2300px)}.ks .hero.plain .wrap{max-width:calc(min(90vw,2300px) - 40px)}.ks article.prose>:is(.filters,.agetabs){max-width:54rem}}
.ks .agetabs{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 2em}
.ks .agetabs a,.ks .agetabs span{font-family:var(--hf);font-size:1.1rem;padding:6px 18px;border-radius:999px;border:2px solid #2e4b3c;text-decoration:none;color:#2e4b3c;background:#fff}
.ks .agetabs span{background:#2e4b3c;color:#f4f1e6}
/* Chalk slates */
.ks .sl-note{font-size:.92rem;color:var(--muted)}
.ks .slates{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:26px;margin:0 0 2em}
.ks .slate{position:relative;background-color:#2e4b3c;background-image:radial-gradient(ellipse at 25% 20%,rgba(255,255,255,.08),transparent 55%),radial-gradient(ellipse at 80% 85%,rgba(255,255,255,.05),transparent 50%);border:9px solid #b07a43;border-radius:10px;box-shadow:inset 0 0 0 1px #8c5d31,inset 0 0 24px rgba(0,0,0,.25),0 5px 0 #8c5d31;color:#f4f1e6;padding:14px 16px 16px;display:flex;flex-direction:column}
.ks .slate:nth-child(4n+2){transform:rotate(-.6deg)}.ks .slate:nth-child(4n+3){transform:rotate(.5deg)}
.ks .sl-top{display:flex;justify-content:space-between;align-items:center;margin:0 0 .4em;font-size:.78rem}
.ks .pl{font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:2px 9px;border-radius:999px;color:#1f2a24}
.ks .pl-in{background:#ffd36e}.ks .pl-out{background:#9fd8c0}.ks .pl-both{background:#ff8a76}
.ks .min{color:#cfdcd3}
.ks .slate h3{margin:.1em 0 .45em;color:#f4f1e6;font-size:1.4rem;line-height:1.15;text-shadow:0 0 1px rgba(244,241,230,.5)}
.ks .ruler{display:grid;grid-template-columns:repeat(11,1fr);border-bottom:2px solid rgba(244,241,230,.7);margin:0 0 .7em}
.ks .ruler span{text-align:center;font-size:.72rem;color:rgba(244,241,230,.55);padding:3px 0 2px;border-left:1px solid rgba(244,241,230,.35);position:relative}
.ks .ruler span:first-child{border-left:0}
.ks .ruler span.on{color:#1f2a24;font-weight:600;background:rgba(255,211,110,.92)}
.ks .ruler span.on+span.on{box-shadow:none}
.ks .sl-m{display:flex;gap:22px;margin:0 0 .6em}
.ks .sl-m div{display:flex;align-items:center;gap:8px}
.ks .sl-m dt{margin:0;font-family:var(--bf);font-weight:500;font-size:.8rem;color:#cfdcd3}
.ks .sl-m dd{margin:0;display:flex;align-items:center}
.ks .tally{display:inline-flex;gap:4px;align-items:flex-end;height:18px}
.ks .tally i{display:block;width:3px;height:17px;background:#f4f1e6;border-radius:2px;transform:rotate(6deg)}
.ks .tally i:nth-child(2){height:15px;transform:rotate(-4deg)}
.ks .tally i.off{background:rgba(244,241,230,.18)}
.ks .sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.ks .need{font-size:.9rem;margin:0 0 .45em;color:#dfe8e1}.ks .need b{color:#ffd36e;font-weight:500}
.ks .how{font-size:.94rem;margin:0;line-height:1.5}
.ks .sl-more{margin-top:auto;padding-top:.7em;font-size:.86rem;color:#ffd36e}
.ks .filters{display:flex;flex-wrap:wrap;gap:8px 10px;align-items:center;margin:0 0 1.2em}
.ks .filters button{font:500 .92rem var(--bf);padding:6px 14px;border-radius:999px;border:2px solid #2e4b3c;background:#fff;color:#2e4b3c;cursor:pointer}
.ks .filters button[aria-pressed="true"]{background:#2e4b3c;color:#f4f1e6}
.ks .filters .lbl{font-family:var(--hf);color:#2e4b3c;font-size:1.05rem;margin-right:4px}
.ks .slate[hidden]{display:none}
@media(max-width:760px){.ks .slates{grid-template-columns:1fr;gap:22px}.ks .slate{transform:none!important}}
@media(min-width:1800px){html:has(body.ks){font-size:18px}.ks{font-size:19px}.ks .slates{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.ks .cards{grid-template-columns:repeat(4,minmax(0,1fr))}.ks .hero h1{max-width:24ch}}
@media(min-width:2300px){html:has(body.ks){font-size:20px}.ks{font-size:21px}.ks .slates{grid-template-columns:repeat(auto-fit,minmax(330px,1fr))}.ks article.prose>:is(p,ul,ol,h2,h3,details,.callout,.table-wrap){max-width:54rem}}