*{box-sizing:border-box}body{margin:0;background:#f5f6f8;color:#17202a;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}header{position:sticky;top:0;z-index:9;background:#111827;color:#fff;padding:14px max(16px,calc((100% - 980px)/2));display:flex;justify-content:space-between;align-items:center}header div{display:flex;flex-direction:column}header strong{font-size:20px}header span{font-size:12px;opacity:.7}main{max-width:980px;margin:auto;padding:20px}.card{background:#fff;border:1px solid #e2e5e9;border-radius:16px;padding:22px;margin-bottom:15px;box-shadow:0 2px 10px #00000008}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:25px;align-items:end}.eyebrow,small{font-weight:800;letter-spacing:.1em;color:#697386;font-size:11px}.ptext{display:flex;justify-content:space-between;font-size:13px;margin-bottom:7px}.bar{height:10px;background:#edf0f3;border-radius:99px;overflow:hidden}.bar div{height:100%;background:#111827}nav{display:flex;gap:8px;overflow:auto;margin:17px 0}button,select,textarea{font:inherit;border:1px solid #d7dce1;background:#fff;border-radius:10px;padding:10px 13px}.tab.active,.primary{background:#111827;color:#fff;border-color:#111827}.panel{display:none}.panel.active{display:block}.phrase{padding:13px 0;border-bottom:1px solid #eee}.ms{font-size:20px;font-weight:750}.en{color:#697386;margin-top:3px}.natural{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:12px 0;border-bottom:1px solid #eee}.natural span{display:block;color:#697386;font-size:11px;font-weight:800}.flash{min-height:190px;border:1px solid #e2e5e9;border-radius:14px;padding:22px;display:flex;flex-direction:column;justify-content:center}.flash h3{font-size:24px}.answer{font-size:22px;font-weight:800}.hide{visibility:hidden}.actions{display:flex;gap:8px;justify-content:flex-end;margin-top:10px}textarea{width:100%;min-height:130px;margin-top:10px}.muted{color:#697386}.grammarItem{padding:15px;border:1px solid #e2e5e9;border-radius:12px;margin:10px 0}.grammarItem b{font-size:22px}.road{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.road div{border:1px solid #e2e5e9;border-radius:12px;padding:14px;display:flex;flex-direction:column;color:#697386}.road b{color:#17202a;margin-top:5px}.big{font-size:28px;font-weight:800}.daynav{display:flex;gap:8px}.daynav select{flex:1}footer{text-align:center;padding:28px;color:#697386;font-size:12px}@media(max-width:650px){main{padding:13px}.hero{grid-template-columns:1fr}.natural{grid-template-columns:1fr}.road{grid-template-columns:1fr 1fr}.card{padding:17px}.daynav{display:grid;grid-template-columns:1fr 1fr}.daynav select{grid-column:1/3;grid-row:1}}
.chat{min-height:300px;max-height:480px;overflow:auto;background:#f8f9fb;border:1px solid #e2e5e9;border-radius:14px;padding:14px;margin:12px 0}.bubble{max-width:82%;padding:11px 13px;border-radius:14px;margin:8px 0;line-height:1.4}.bot{background:#fff;border:1px solid #e2e5e9}.user{background:#111827;color:#fff;margin-left:auto}.coach{background:#eef1f5;border-left:4px solid #697386}.bubble small{display:block;margin-bottom:4px}.chatInput{display:flex;gap:8px}.chatInput input{flex:1;font:inherit;border:1px solid #d7dce1;border-radius:10px;padding:11px}