:root{--green:#214e40;--muted:#66746b;--paper:#f7f6f0;--line:#dddeda}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:#263b32;font:16px 'DM Sans',system-ui,sans-serif}button,input,select{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:12px;padding:12px 18px;background:white;color:var(--green);min-height:46px}button:hover{background:#e9eee7}button.primary{background:var(--green);color:white;border-color:var(--green)}button:disabled{opacity:.5;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c68942;outline-offset:3px}input,select{border:1px solid #b9c4ba;border-radius:10px;padding:13px;background:white;color:#263b32;width:100%}label{display:block;margin:16px 0 6px}.layout{display:grid;grid-template-columns:225px 1fr;min-height:100vh}aside{border-right:1px solid var(--line);padding:35px 22px;background:#f0f1e9;position:sticky;top:0;height:100vh}.brand{font:32px 'Libre Caslon Text',Georgia,serif;letter-spacing:-1px}.brand span{color:#b98b54}.tag{font-size:12px;color:var(--muted);margin:10px 0 40px}nav{display:grid;gap:8px}nav button{text-align:left;background:transparent;border:0;display:flex;gap:12px;align-items:center}nav button.active{background:#dce6d9;font-weight:700}main{max-width:1100px;padding:32px 48px 70px;width:100%;margin:auto}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:40px;color:var(--muted);font-size:14px}.pill{border:1px solid var(--line);padding:8px 13px;border-radius:30px;background:#fff}h1,h2,h3,p{margin-top:0}h1{font:44px/1.15 'Libre Caslon Text',Georgia,serif;letter-spacing:-1px;margin-bottom:16px}h2{font:26px 'Libre Caslon Text',Georgia,serif}h3{font-size:18px;margin-bottom:8px}p{line-height:1.65;color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:11px;font-weight:700;color:var(--green);margin-bottom:15px}.hero{background:#e5ebdf;border:1px solid #d6dfcf;border-radius:22px;padding:34px;position:relative;overflow:hidden}.hero h2{font-size:33px;max-width:440px}.hero p{max-width:430px}.hero .sprout{position:absolute;right:35px;top:40px;width:150px;height:150px;border-radius:50%;border:1px solid #b5c4ad;display:grid;place-items:center;font-size:76px;color:#527456;background:#dce5d4}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px 0}.stat{padding:20px;background:#fff;border:1px solid var(--line);border-radius:15px}.stat strong{font:29px Georgia,serif;display:block;margin-bottom:8px}.small{font-size:13px;color:var(--muted)}.row{display:flex;align-items:center;justify-content:space-between;gap:14px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.number{width:36px;height:36px;background:#edf1e9;display:grid;place-items:center;border-radius:50%;font-size:14px;margin-bottom:20px}.meter{height:7px;border-radius:9px;background:#d7dfd2;overflow:hidden;margin:16px 0}.meter span{display:block;background:var(--green);height:100%}.phrase{padding:18px 0;border-bottom:1px solid var(--line)}.native{font-size:25px;color:#213f31;line-height:1.5}.reading{font-size:14px;color:#687b5d;margin:5px 0}.exercise{text-align:center;padding:40px 25px}.exercise input{text-align:center;max-width:520px;margin:15px auto}.feedback{padding:16px;border-radius:10px;background:#eef1e8;text-align:left;margin:16px 0;line-height:1.65}.error{background:#f8e9d9}.onboard{max-width:640px;margin:50px auto;padding:0 20px}.onboard .card{padding:32px}footer{margin-top:28px;font-size:12px;color:var(--muted)}.check{display:flex;gap:12px;align-items:center}.check input{width:20px}.notice{border-left:3px solid #b68b55;padding:10px 16px;background:#f2efe5;font-size:14px}.hidden{display:none}ul{line-height:1.8;color:var(--muted)}@media(max-width:760px),(max-height:500px){.layout{display:block}aside{height:auto;padding:18px 20px;position:static;border-right:0;border-bottom:1px solid var(--line)}.tag{display:none}.brand{font-size:27px}nav{position:fixed;bottom:0;left:0;right:0;grid-template-columns:repeat(6,1fr);gap:0;background:#f8faf5;border-top:1px solid var(--line);z-index:5;padding:6px 2px}nav button{font-size:10px;display:grid;text-align:center;gap:4px;padding:8px 2px;border-radius:9px}nav button span{font-size:19px}main{padding:23px 20px 100px}.top{margin-bottom:28px}h1{font-size:35px}.hero{padding:25px}.hero h2{font-size:29px;max-width:80%}.hero .sprout{width:65px;height:65px;font-size:32px;right:14px;top:25px}.hero p{max-width:85%}.grid{grid-template-columns:1fr}.stats{gap:8px}.stat{padding:15px 10px}.stat strong{font-size:24px}.small{font-size:12px}.onboard{margin:25px auto}}
.dialogue-line{padding:18px 0;border-bottom:1px solid var(--line)}.dialogue-line button{margin-top:8px}.dialogue-line p{margin:8px 0}.choices{display:grid;gap:12px}.choices button{text-align:left}.question{margin-top:30px}details{margin-top:24px;padding:18px 0}summary{cursor:pointer;min-height:44px;display:flex;align-items:center;color:var(--green);font-weight:600}.exercise #reveal{margin:15px 0}.exercise #revealed:not(:empty){padding:18px;background:#f2f4eb;border-radius:14px;margin:12px 0}.exercise #reveal+div p{margin-bottom:0}button:disabled{cursor:default}#storage{line-height:1.6}.row>span{min-width:0}.dialogue-line .native{overflow-wrap:anywhere}

.concept-visual{font-size:100px;text-align:center;margin:24px 0;line-height:1.3}.concept-preview{font-size:25px;line-height:1.8}#concept-help{margin:12px 0}

/* iPhone browser and Home Screen layouts; retain pinch zoom and Dynamic Type. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{min-height:100vh;min-height:100dvh}button,summary{touch-action:manipulation}input,select,textarea{font-size:16px}button,summary{min-height:44px}.layout,main,.grid>*{min-width:0}.native,.reading,h2,p{overflow-wrap:break-word}
@media(max-width:760px),(max-height:500px){
 aside{padding-top:calc(18px + env(safe-area-inset-top,0px));padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
 main{padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px));padding-bottom:calc(110px + env(safe-area-inset-bottom,0px))}
 nav{padding-bottom:calc(6px + env(safe-area-inset-bottom,0px));padding-left:max(2px,env(safe-area-inset-left,0px));padding-right:max(2px,env(safe-area-inset-right,0px))}
 nav button{min-width:0;min-height:48px}.top{gap:12px}.top>span{min-width:0}.pill{flex-shrink:0;max-width:50%;font-size:13px}.onboard{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
 body.editing nav{display:none}body.editing main{padding-bottom:40px}input{scroll-margin:24px}.exercise{padding:28px 18px}.row{flex-wrap:wrap}.stats .small{overflow-wrap:anywhere}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}