:root{--teal:#1f6f78;--teal-d:#17565d;--teal-l:#e6f2f3;--slate:#1e2a32;--muted:#5b6a76;--bg:#f4f7f8;--line:#d9e2e5;--warn:#fff7e0}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--slate);background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal)}a:hover{color:var(--teal-d)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
.site-header{background:var(--slate);color:#fff}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:12px;padding-bottom:12px}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:1.1rem;display:flex;align-items:center;gap:10px}
.brand:hover{color:#fff}
.logo{background:var(--teal);border-radius:7px;width:34px;height:34px;display:inline-grid;place-items:center;font-size:.85rem}
.site-header nav{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:.95rem}
.site-header nav a{color:#cfe3e6;text-decoration:none;padding:2px 0}
.site-header nav a:hover,.site-header nav a[aria-current]{color:#fff;border-bottom:2px solid #5fb3bb}
h1,h2,h3{line-height:1.25;color:var(--slate)}
h1{font-size:clamp(1.8rem,4vw,2.5rem);margin:.4em 0 .2em}
h2{font-size:clamp(1.35rem,3vw,1.7rem);margin:2em 0 .5em;padding-top:.2em}
h3{font-size:1.15rem;margin:1.5em 0 .4em}
p,li{max-width:72ch}
.meta,.small{color:var(--muted);font-size:.9rem}
.crumbs{font-size:.88rem;color:var(--muted);margin-top:20px}
.answer{background:var(--teal-l);border-left:5px solid var(--teal);padding:14px 20px;border-radius:6px;margin:18px 0}
.answer p{margin:0;max-width:none}
.toc{border:1px solid var(--line);border-radius:8px;padding:12px 20px;margin:20px 0;background:#fbfdfd}
.toc p{margin:0 0 4px;font-weight:700}.toc ol{margin:0;padding-left:20px;columns:2;column-gap:30px}
.toc li{font-size:.95rem;break-inside:avoid}
.note{background:var(--warn);border:1px solid #f0dfa8;border-radius:6px;padding:10px 14px;font-size:.93rem}
.label-ex{background:#fff4e5;border:1px dashed #d9822b;border-radius:6px;padding:10px 14px;font-size:.93rem;color:#7a3e00}
.table-wrap{overflow-x:auto;margin:12px 0}
table.calc{border-collapse:collapse;width:100%;max-width:720px;font-size:.95rem}
table.calc caption{text-align:left;font-weight:700;padding:6px 0;color:var(--teal)}
table.calc td{border-bottom:1px solid var(--line);padding:7px 10px;vertical-align:top}
table.calc tr:last-child td{font-weight:700;border-bottom:2px solid var(--teal)}
td.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
ol.steps{padding-left:0;list-style:none;counter-reset:s}
ol.steps li{counter-increment:s;position:relative;padding:10px 0 10px 48px;border-bottom:1px solid var(--line)}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:10px;width:32px;height:32px;border-radius:50%;background:var(--teal);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.9rem}
.kit{background:var(--bg);border-radius:12px;padding:6px 24px 24px;margin-top:2.5em}
.kit h2{margin-top:1em}
.kit-top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
figure{margin:16px 0}
figure img{border-radius:8px;border:1px solid var(--line);background:#fff}
figure.wide{max-width:640px}
.price{font-size:1.05rem}
.buy{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}
.btn{display:inline-block;padding:12px 18px;border-radius:8px;font-weight:700;text-decoration:none;text-align:center}
.btn-etsy{background:var(--teal);color:#fff}.btn-etsy:hover{background:var(--teal-d);color:#fff}
.btn-gum{background:var(--slate);color:#fff}.btn-gum:hover{background:#000;color:#fff}
ul.cols{columns:2;column-gap:30px;padding-left:20px}ul.cols li{break-inside:avoid;margin-bottom:6px}
.gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.gallery figure{margin:0}
.faq{border-bottom:1px solid var(--line);padding-bottom:6px}
.faq h3{margin-bottom:.2em}
.disclaimer{border-top:2px solid var(--line);margin:40px 0 20px;color:var(--muted);font-size:.92rem}
.disclaimer h2{font-size:1rem;margin:1em 0 .3em;color:var(--muted)}
.site-footer{background:var(--slate);color:#cfd8dd;padding:24px 0;margin-top:50px;font-size:.92rem}
.site-footer a{color:#9fd3d8}.site-footer .small{color:#9aa8b1}
/* home */
.hero{background:linear-gradient(135deg,var(--slate),#24414a);color:#fff;padding:48px 0 40px}
.hero h1{color:#fff;margin-top:0}.hero p{color:#dbe6ea;font-size:1.1rem}
.hero .answer{background:rgba(255,255,255,.08);border-left-color:#5fb3bb}.hero .answer p{color:#fff}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:22px;margin:24px 0}
.card{border:1px solid var(--line);border-radius:12px;padding:14px;background:#fff;display:flex;flex-direction:column}
.card img{border-radius:8px;background:var(--bg)}
.card h3{margin:.8em 0 .3em}.card h3 a{color:var(--slate);text-decoration:none}
.card p{margin:.3em 0;font-size:.95rem}.card-links{margin-top:auto!important;font-weight:700}
.card-buy{color:var(--muted)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.about{background:var(--bg);border-radius:12px;padding:8px 24px 18px;margin-top:30px}
@media (max-width:760px){
 body{font-size:16px}
 .kit-top,.two{grid-template-columns:1fr}
 .gallery{grid-template-columns:repeat(2,minmax(0,1fr))}
 .toc ol,ul.cols{columns:1}
 .kit{padding:4px 14px 18px}
 .btn{flex:1 1 100%}
 .site-header nav{font-size:.88rem}
}
.guide{max-width:880px}
.guide p,.guide li{max-width:none}