:root{--bg:#fbf8f2;--ink:#1f2933;--muted:#4a5561;--accent:#1d4e89;--accent-d:#163b68;--red:#ef6f6c;--yellow:#f6d55c;--orange:#f4a259;--rule:#e6dccb;--card:#fff;--soft:#fdf1dc;
--head:ui-rounded,"SF Pro Rounded","Segoe UI Rounded","Arial Rounded MT Bold",Nunito,"Trebuchet MS",system-ui,sans-serif;
--body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}
html{font-size:100%;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.1875rem;line-height:1.7}
h1,h2,h3{font-family:var(--head);line-height:1.2;color:var(--ink)}
a{color:var(--accent);text-underline-offset:.18em}
a:hover{color:var(--accent-d)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px;box-shadow:0 0 0 6px var(--yellow)}
.skip{position:absolute;left:1rem;top:-4rem;background:var(--ink);color:#fff;padding:.6rem 1rem;border-radius:8px;z-index:10;font-weight:700}
.skip:focus{top:1rem;color:#fff}
.wrap{max-width:68rem;margin:0 auto;padding:0 1.25rem}
.narrow{max-width:44rem}
.prose{max-width:42rem}
header.site{background:var(--card);border-bottom:1px solid var(--rule)}
.bar{max-width:68rem;margin:0 auto;padding:.85rem 1.25rem;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1.5rem}
.logo,.flogo{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--head);font-weight:800;font-size:1.3rem;color:var(--ink);text-decoration:none}
.mark{width:3rem;height:2rem;flex:none}
nav{display:flex;flex-wrap:wrap;gap:.25rem}
nav a{font-size:1.05rem;font-weight:600;color:var(--accent);text-decoration:none;padding:.4rem .75rem;border-radius:999px}
nav a:hover{background:var(--soft);color:var(--accent-d)}
nav a[aria-current="page"]{background:var(--ink);color:#fff}
main{padding-bottom:3.5rem}
.eyebrow{font-family:var(--head);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.95rem;color:#8a3b1d;margin:0 0 .5rem}
.lead{font-size:1.3rem;color:var(--ink)}
.phead{padding:2.5rem 0 .5rem}
.phead h1{font-size:clamp(2rem,5vw,2.75rem);margin:0 0 .75rem}
/* hero */
.hero{background:linear-gradient(180deg,#fff6e6 0%,var(--bg) 100%);border-bottom:1px solid var(--rule)}
.hero-in{display:grid;grid-template-columns:1.1fr 1fr;gap:2rem;align-items:center;padding-top:3.5rem;padding-bottom:3.5rem}
.hero h1{font-size:clamp(2.2rem,6vw,3.4rem);margin:0 0 1rem}
.hero-art svg{width:100%;height:auto;max-width:28rem;display:block;margin:0 auto}
.hero-art .st{font-family:var(--head);font-weight:800;font-size:40px;fill:#1f2933}
.hero-art .op{font-family:var(--head);font-weight:800;font-size:56px;fill:#1f2933}
.btns{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.75rem}
.btn,button{display:inline-block;font:inherit;font-family:var(--head);font-weight:700;font-size:1.15rem;line-height:1.2;padding:.85rem 1.4rem;border-radius:999px;background:var(--accent);color:#fff;border:2px solid var(--accent);text-decoration:none;cursor:pointer;min-height:48px}
.btn:hover,button:hover{background:var(--accent-d);border-color:var(--accent-d);color:#fff}
.btn.alt{background:#fff;color:var(--accent)}
.btn.alt:hover{background:var(--soft);color:var(--accent-d)}
/* how */
.how{padding-top:3rem}
.how h2,.letter{text-align:left}
.howsteps{list-style:none;padding:0;margin:1.5rem 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.howsteps li{background:var(--card);border:1px solid var(--rule);border-radius:20px;padding:1.5rem}
.howsteps h3{font-size:1.35rem;margin:1rem 0 .25rem}
.howsteps p{margin:0}
.vis{display:flex;align-items:center;gap:.4rem;min-height:5.5rem}
.bub{display:inline-flex;align-items:center;justify-content:center;width:5rem;height:5rem;border-radius:50%;font-family:var(--head);font-weight:800;font-size:1.3rem;color:var(--ink)}
.bub.wide{width:auto;min-width:6.5rem;padding:0 1.1rem;border-radius:999px}
.bub.r{background:var(--red)}.bub.y{background:var(--yellow)}.bub.o{background:var(--orange)}
.plus{font-family:var(--head);font-weight:800;font-size:1.6rem}
.letter{padding-top:2.5rem}
h2{font-size:1.75rem;margin:2.75rem 0 .6rem}
h3{font-size:1.25rem}
.prose h2{padding-top:1.25rem;border-top:3px solid var(--rule);position:relative}
.prose h2::before{content:"";position:absolute;top:-3px;left:0;width:3.5rem;height:3px;background:var(--orange)}
.byline,.sig{color:var(--muted)}
.sig{font-style:italic}
li{margin:.4rem 0}
.steps{list-style:none;counter-reset:s;background:var(--card);border:1px solid var(--rule);border-radius:16px;padding:1.25rem 1.25rem 1.25rem 1.25rem;margin:1.5rem 0}
.steps>li{counter-increment:s;position:relative;padding-left:3.25rem;margin:.9rem 0;min-height:2.4rem}
.steps>li::before{content:counter(s);position:absolute;left:0;top:-.1rem;width:2.3rem;height:2.3rem;border-radius:50%;background:var(--yellow);font-family:var(--head);font-weight:800;display:flex;align-items:center;justify-content:center}
.steps>li:nth-child(3n+1)::before{background:var(--red)}
.steps>li:nth-child(3n)::before{background:var(--orange)}
.steps ol{margin:.25rem 0 0;padding-left:1.5rem}
.note,.aside{background:var(--soft);border-left:5px solid var(--orange);padding:1rem 1.25rem;border-radius:0 12px 12px 0;margin:2rem 0}
figure{margin:2rem 0;background:var(--card);border:1px solid var(--rule);border-radius:20px;padding:1rem}
figure img{display:block;max-width:100%;height:auto;margin:0 auto}
figcaption{color:var(--muted);font-size:1.05rem;margin-top:.75rem;text-align:center}
/* cards */
.cards{list-style:none;padding:0;margin:1rem 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(18rem,1fr));gap:1.25rem}
.card{margin:0;background:var(--card);border:1px solid var(--rule);border-top:6px solid var(--orange);border-radius:16px;padding:1.4rem 1.4rem 1.2rem;position:relative}
.cards .card:nth-child(3n+1){border-top-color:var(--red)}.cards .card:nth-child(3n+2){border-top-color:var(--yellow)}
.card h3{margin:.6rem 0 .4rem;font-size:1.25rem}
.card h3 a{text-decoration:none}.card h3 a::after{content:"";position:absolute;inset:0;border-radius:16px}
.card:hover{box-shadow:0 6px 18px rgba(31,41,51,.08)}
.card:focus-within{outline:3px solid var(--accent);outline-offset:3px}
.card h3 a:focus-visible{outline:none;box-shadow:none}
.card p{margin:0;color:var(--muted)}
.tag{display:inline-block;font-size:.9rem;font-weight:700;background:var(--soft);color:#7a3418;border-radius:999px;padding:.15rem .7rem}
/* words */
.wordbox{background:var(--card);border:3px solid var(--orange);border-radius:28px;font-family:var(--head);font-weight:800;font-size:clamp(3rem,13vw,5.5rem);line-height:1.1;text-align:center;padding:3rem 1rem;margin:1.5rem 0;overflow-wrap:anywhere;box-shadow:0 8px 0 var(--yellow)}
.wctrl{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 1.5rem;margin-top:2rem}
.btn.big{font-size:1.5rem;padding:1rem 2.25rem}
.toggle{display:inline-flex;align-items:center;gap:.6rem;cursor:pointer}
.toggle input{width:1.5rem;height:1.5rem;accent-color:var(--accent)}
.hint{color:var(--muted)}
kbd{font-family:var(--body);font-size:.95rem;background:#fff;border:1px solid #b9ae9a;border-bottom-width:3px;border-radius:6px;padding:.05rem .45rem}
footer.site{border-top:1px solid var(--rule);background:var(--card)}
footer .in{max-width:68rem;margin:0 auto;padding:1.5rem 1.25rem;color:var(--muted);font-size:1.05rem}
footer .in p{margin:.3rem 0}
footer .flogo{font-size:1.1rem}
footer a{overflow-wrap:anywhere;display:inline-block}
@media (max-width:820px){.hero-in{grid-template-columns:1fr;padding-top:2.25rem;padding-bottom:2.25rem}.hero-art svg{max-width:20rem}.howsteps{grid-template-columns:1fr}}
@media (max-width:480px){body{font-size:1.125rem}.lead{font-size:1.2rem}.bar{padding:.75rem 1rem}.wrap{padding:0 1rem}nav a{padding:.35rem .6rem;font-size:1rem}.btns .btn{flex:1 1 100%;text-align:center}.steps>li{padding-left:2.9rem}}
/* word builder */
.wbtop{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 2rem;margin-top:1rem}
.levels{border:1px solid var(--rule);background:var(--card);border-radius:16px;padding:.5rem 1rem .75rem;margin:0;display:flex;flex-wrap:wrap;gap:.25rem 1.25rem}
.levels legend{font-family:var(--head);font-weight:700;padding:0 .4rem}
.levels label{display:inline-flex;align-items:center;gap:.5rem;min-height:44px;cursor:pointer}
.levels input{width:1.4rem;height:1.4rem;accent-color:var(--accent)}
.wbword{padding:1.5rem 1rem;margin:1.25rem 0 1.75rem}
.build{background:var(--card);border:1px solid var(--rule);border-radius:24px;padding:1.25rem 1.25rem 1.5rem}
.build h2{margin:0 0 .25rem;font-size:1.5rem}
.stepno{margin:0;color:var(--muted);font-weight:700}
.stage{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.75rem 1rem;min-height:9rem;padding:1rem 0}
.pair,.result{display:flex;align-items:center;gap:.6rem}
.pair[hidden],.result[hidden],.done[hidden]{display:none}
.bub.big{width:6.5rem;height:6.5rem;font-size:1.6rem;overflow-wrap:anywhere;text-align:center}
.bub.big.wide{width:auto;min-width:6.5rem;padding:0 1.2rem}
.eq{font-family:var(--head);font-weight:800;font-size:1.8rem}
.merged .pair{opacity:.55}
.pop{animation:pop .5s ease-out}
@keyframes pop{0%{transform:scale(.4);opacity:0}70%{transform:scale(1.08);opacity:1}100%{transform:scale(1)}}
.done{text-align:center}
.dword{font-family:var(--head);font-weight:800;font-size:clamp(3rem,12vw,5rem);line-height:1.1;margin:0;background:var(--orange);border-radius:999px;padding:.4rem 2rem;display:inline-block}
.dmsg{font-size:1.3rem;margin:.75rem 0 0}
.wbbtns{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:.5rem}
.wbbtns .btn.big{flex:1 1 100%}
.wbbtns .btn.alt{flex:1 1 8rem}
button:disabled{opacity:.45;cursor:not-allowed}
.btn.alt:disabled:hover{background:#fff;color:var(--accent)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (max-width:480px){.bub.big{width:5.25rem;height:5.25rem;font-size:1.3rem}.bub.big.wide{min-width:5.25rem;padding:0 .9rem}.stage{gap:.5rem}.pair,.result{gap:.4rem}.build{padding:1rem}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}