:root{--ink:#142d29;--green:#21624d;--mint:#eaf5eb;--paper:#fbfcf6;--line:#dbe5da;--muted:#49625b}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font:16px/1.55 system-ui,sans-serif}a{color:var(--green);text-underline-offset:3px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline-offset:3px;outline:3px solid #d3810c}.wrap{width:calc(100% - 40px);max-width:1160px;margin:auto}.site-head{border-bottom:1px solid var(--line);background:#fff}.nav,.foot,.row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.nav{padding:16px 0}.nav nav{flex-wrap:wrap;align-items:center;gap:clamp(10px,3vw,26px);display:flex}.nav a{font-weight:700;text-decoration:none}.brand{letter-spacing:-1px;color:var(--ink);align-items:center;gap:5px;font-size:25px;display:flex}.brand span:not(.mark){color:var(--green)}.mark{background:var(--green);color:#fff;border-radius:10px;place-items:center;width:35px;margin-right:5px;font-size:27px;display:grid}.nav-family{background:var(--mint);border-radius:9px;padding:8px 14px}.hero{border-bottom:1px solid var(--line);background:radial-gradient(#c9dfcd 1px,#0000 1px) 0 0/18px 18px,#eaf4e8;padding:clamp(35px,7vw,86px) 0}.hero-grid{grid-template-columns:1.25fr 1fr;align-items:center;gap:48px;display:grid}.eyebrow{color:var(--green);letter-spacing:.12em;margin:0 0 10px;font-size:.78rem;font-weight:800}h1,h2,h3{letter-spacing:-.035em;margin:0 0 12px;line-height:1.15}h1{font-size:clamp(2.15rem,5vw,4rem)}h1 em{color:var(--green);font-style:normal}h2{font-size:clamp(1.35rem,3vw,2.1rem)}h3{font-size:1.28rem}.lede{color:var(--muted);max-width:65ch;font-size:1.13rem}.hint,.card p,.foot{color:var(--muted)}.hint{font-size:.91rem}.actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.btn{border:1px solid var(--green);background:var(--green);color:#fff;cursor:pointer;border-radius:10px;justify-content:center;align-items:center;min-height:44px;padding:10px 16px;font-weight:750;text-decoration:none;display:inline-flex}.btn:hover{filter:brightness(.92)}.btn.secondary{color:var(--green);background:#fff;border-color:#bdd3c4}.btn:disabled,.btn[aria-disabled=true]{opacity:.55;cursor:default}.hero-art{padding:16px;position:relative}.sheet{border:1px solid var(--line);background:#fff;border-radius:22px;padding:clamp(18px,4vw,34px);transform:rotate(-3deg);box-shadow:9px 14px #bfd8c2}.sheet b{margin:10px 0 18px;font-size:clamp(1.4rem,4vw,2.1rem);display:block}.sheet p{margin:8px 0}.solved{color:var(--green);font-weight:800}.bar{grid-template-columns:repeat(6,1fr);gap:5px;display:grid}.bar span{background:#eaf4e8;border-radius:4px;height:30px}.bar .filled{background:#6db78d}.sticker{background:#ffdc87;border-radius:50%;place-items:center;width:54px;height:54px;font-size:30px;font-weight:900;display:grid;position:absolute;top:-9px;right:0;transform:rotate(12deg)}.section{padding:38px 0}.grid{gap:16px;display:grid}.four{grid-template-columns:repeat(4,1fr)}.three{grid-template-columns:repeat(3,1fr)}.two{grid-template-columns:repeat(2,1fr)}.card{border:1px solid var(--line);background:#fff;border-radius:16px;padding:22px}.level{color:var(--ink);text-decoration:none}.level:hover{border-color:var(--green);background:#f3faf3}.level h3{margin-top:13px}.level strong{color:var(--green)}.badge{color:#194c3b;background:var(--mint);border-radius:8px;padding:4px 9px;font-weight:750;display:inline-block}.controls{flex-wrap:wrap;align-items:end;gap:14px;display:flex}.controls label{flex:1;min-width:130px}.stack{gap:13px;display:grid}.stack>.btn{justify-self:start}label{gap:5px;font-weight:700;display:grid}select,input:not([type=radio]){max-width:100%;color:var(--ink);background:#fff;border:1px solid #aebfb4;border-radius:8px;padding:9px 11px}select{width:100%}.empty,.spaced{margin-top:16px}.empty p{max-width:55ch}.notice{background:var(--mint);border-radius:10px;padding:12px 16px}.row{padding:9px 0}.quiz{max-width:800px}.question h1{font-size:clamp(1.45rem,4vw,2.1rem)}.question fieldset{border:0;gap:8px;margin:16px 0;padding:0;display:grid}.option{border:1px solid var(--line);cursor:pointer;border-radius:10px;align-items:center;gap:10px;padding:10px;display:flex}.option span{background:#edf1ee;border-radius:6px;padding:3px 8px}.option.selected{border-color:var(--green);background:#f1f9f1}.option.right{border:2px solid var(--green);background:var(--mint)}.back{color:var(--green);cursor:pointer;background:0 0;border:0;padding:8px 0;font-weight:700}.quiz progress{width:100%;accent-color:var(--green);margin-bottom:14px}.sr-only{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}footer{border-top:1px solid var(--line);background:#fff;margin-top:25px;padding:24px 0}.text-link{margin-top:10px;font-weight:750;display:inline-block}@media (max-width:750px){.hero-grid{grid-template-columns:1fr;gap:20px}.hero-art{max-width:420px}.four,.three{grid-template-columns:repeat(2,1fr)}.two{grid-template-columns:1fr}.section{padding:27px 0}}@media (max-width:430px){.wrap{width:calc(100% - 26px)}.nav{gap:8px}.nav nav{gap:12px;font-size:.92rem}.card{padding:15px}.hero-grid .actions .btn{width:100%}.controls label{min-width:100%}}