:root{--teal:#1F7A6D;--ink:#17312D;--muted:#4F615E;--bg:#F7F5F0;--card:#FFFFFF;--line:#DAD6CB}
*{box-sizing:border-box}
html{font-size:100%}
body{margin:0;font:1.0625rem/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:60rem;margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px}
.skip:focus{left:1rem;top:1rem;background:#fff;padding:.5rem 1rem;z-index:10}
header.site{border-bottom:1px solid var(--line);background:var(--bg)}
.bar{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;padding-top:.75rem;padding-bottom:.75rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.4rem;color:var(--ink);text-decoration:none}
nav{display:flex;flex-wrap:wrap;gap:.25rem 1.25rem}
nav a{color:var(--ink);padding:.4rem 0;text-decoration:none;border-bottom:2px solid transparent}
nav a:hover,nav a[aria-current]{border-bottom-color:var(--teal)}
a{color:var(--teal)}
a:focus-visible,.btn:focus-visible{outline:3px solid #0B4F46;outline-offset:3px}
main{padding-top:2rem;padding-bottom:3rem}
h1{font-size:2.25rem;line-height:1.2;margin:.5rem 0 1rem}
h2{font-size:1.5rem;margin:2rem 0 .75rem}
h3{font-size:1.15rem;margin:.5rem 0 .25rem}
.hero{padding:2rem 0}
.hero h1{font-size:2.75rem}
.lead{font-size:1.25rem}
.muted{color:var(--muted);font-size:.95rem}
.btn{display:inline-block;background:var(--teal);color:#fff;padding:.8rem 1.4rem;border-radius:.6rem;text-decoration:none;font-weight:600}
.btn:hover{background:#17604F}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1rem}
.cards li{background:var(--card);border:1px solid var(--line);border-radius:.8rem;padding:1rem 1.25rem}
.cards p{margin:.25rem 0}
.avatar{display:inline-grid;place-items:center;width:3rem;height:3rem;border-radius:50%;background:var(--teal);color:#fff;font-weight:700}
.tag{font-size:.85rem;color:var(--muted)}
.notice{background:#FFF6D6;border:1px solid #E3CF7D;padding:.9rem 1.1rem;border-radius:.6rem}
.steps{padding-left:1.25rem}
table{border-collapse:collapse;width:100%;background:var(--card)}
th,td{border:1px solid var(--line);padding:.6rem .8rem;text-align:left;vertical-align:top}
th{background:#EEF3F1}
footer.site{border-top:1px solid var(--line);padding:1.5rem 0;background:#EFEBE1}
footer.site p{margin:.35rem 0}
@media (max-width:40rem){h1,.hero h1{font-size:2rem}}
@media (prefers-reduced-motion:no-preference){.btn{transition:background .15s}}
/* Interactive pages: try-it and time calculator */
.demo,.calc{background:var(--card);border:1px solid var(--line);border-radius:.8rem;padding:1.25rem;margin:1.5rem 0}
.demo[hidden],.calc[hidden],[hidden]{display:none!important}
.choices{border:0;padding:0;margin:0 0 1rem;display:flex;flex-wrap:wrap;gap:.5rem}
.choices legend{font-weight:700;padding:0;margin-bottom:.5rem}
.choices label{display:inline-flex;align-items:center;gap:.5rem;min-height:3rem;padding:.4rem .9rem;border:1px solid var(--line);border-radius:.6rem;background:#fff;cursor:pointer}
.choices label:has(input:checked){border-color:var(--teal);background:#EAF4F1;font-weight:600}
.choices input{width:1.25rem;height:1.25rem;accent-color:var(--teal)}
.step-card{background:#EEF3F1;border-radius:.6rem;padding:1rem 1.25rem}
.step-card p{margin:.15rem 0}
.goal{font-size:1.1rem}
.tiny{font-size:1.5rem;font-weight:700;line-height:1.3}
.actions{display:flex;flex-wrap:wrap;gap:.75rem}
button.btn{border:0;font:inherit;font-weight:600;cursor:pointer;min-height:3rem}
button.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--teal);border:2px solid var(--teal)}
.btn.ghost:hover{background:#EAF4F1}
.countdown{margin-top:1rem}
.count-text{font-size:3rem;font-weight:700;margin:0;line-height:1}
.bar-track{height:.75rem;background:#DAD6CB;border-radius:1rem;overflow:hidden;margin:.75rem 0}
.bar-fill{height:100%;width:0;background:var(--teal)}
.calc label{display:block;font-weight:600;margin-bottom:.35rem}
.calc input,.calc select{font:inherit;min-height:3rem;padding:.4rem .75rem;border:2px solid #7A8B87;border-radius:.5rem;background:#fff;color:var(--ink);max-width:14rem;width:100%}
.calc input:focus-visible,.calc select:focus-visible{outline:3px solid #0B4F46;outline-offset:2px}
.result-box{background:#EEF3F1;border-radius:.6rem;padding:.5rem 1rem;margin-top:1rem}
@media (prefers-reduced-motion:reduce){.bar-fill{transition:none}}