:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#172d43;background:#f5f5f1}*{box-sizing:border-box}body{margin:0}.shell{max-width:850px;margin:auto;padding:0 20px}header{display:flex;align-items:center;justify-content:space-between;padding:22px 0;border-bottom:1px solid #dce2e1}.brand{display:flex;gap:12px;align-items:center}.brandmark{display:grid;place-items:center;background:#d5ede5;border-radius:15px;color:#166958;width:43px;height:43px;font-size:28px}.brand b{display:block;font-size:22px;letter-spacing:-1px}.brand small{font-size:9px;letter-spacing:2px;color:#697d87}.hero{padding:42px 0 28px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2px;color:#14745f}.hero h1{font-size:clamp(39px,7vw,65px);letter-spacing:-2.5px;line-height:1.07;margin:16px 0}.hero em{font-style:normal;color:#18826c}.hero p{max-width:550px;line-height:1.65;color:#657782}.stats{display:flex;gap:12px;margin-top:28px}.stats>div{background:white;border:1px solid #e2e8e5;border-radius:15px;padding:14px 22px;min-width:110px}.stats strong{display:block;font-size:24px}.stats span{color:#6b7c86;font-size:12px}.tabs{display:flex;border-bottom:1px solid #dbe1df;gap:8px;margin-top:8px}.tab{border:0;background:none;padding:15px 17px;font-weight:700;color:#667a82;cursor:pointer}.tab.active{color:#136d5b;border-bottom:3px solid #167b65}.panel{padding:30px 0}.section-heading{margin:10px 0 16px}h2{font-size:22px;letter-spacing:-.6px;margin:6px 0}.persona-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:32px}.persona,.scenario{background:white;border:2px solid #e4eae7;border-radius:16px;padding:16px;text-align:left;cursor:pointer;color:inherit}.persona.selected,.scenario.selected{border-color:#15816a;background:#f0fbf5}.persona .face{font-size:27px;display:block;margin-bottom:6px}.persona strong,.scenario strong{display:block;margin-bottom:4px}.persona small,.scenario small{display:block;color:#72828b;line-height:1.5}.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:22px}.primary,.outline{border-radius:12px;padding:13px 18px;font-weight:750;font-size:14px;cursor:pointer}.primary{background:#157961;color:white;border:1px solid #157961}.primary:hover{background:#0c624f}.outline{background:white;border:1px solid #cad8d3;color:#176652}.wide{width:100%;display:flex;justify-content:space-between;font-size:16px;padding:18px}.hidden{display:none!important}.game-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.back{background:none;border:0;color:#397566;font-weight:700;cursor:pointer}.pill{background:#e1f0e9;color:#176652;border-radius:30px;padding:7px 12px;font-size:12px}.partner-head{display:flex;align-items:center;gap:12px;padding-bottom:15px;border-bottom:1px solid #dfe5e2}.avatar{background:#d7e7fb;width:54px;height:54px;display:grid;place-items:center;border-radius:17px;font-size:25px;font-weight:800;color:#29567a}.partner-head h2{margin:0}.partner-head p{margin:3px 0;color:#71818b;font-size:13px}.chat{min-height:180px;padding:20px 0;display:flex;flex-direction:column;gap:12px}.bubble{max-width:88%;padding:13px 16px;border-radius:17px;line-height:1.5;font-size:15px}.bubble.them{align-self:flex-start;background:white;border:1px solid #e1e8e5;border-bottom-left-radius:4px}.bubble.me{align-self:flex-end;background:#d9efe6;border-bottom-right-radius:4px}.composer,.feedback,.complete{background:white;border:1px solid #e1e8e5;border-radius:17px;padding:18px;margin:12px 0}.composer label{display:block;font-weight:750;margin-bottom:10px}textarea{width:100%;resize:vertical;min-height:95px;border:1px solid #d1ded8;border-radius:11px;padding:12px;font:inherit;line-height:1.5;color:#173448}textarea:focus{outline:2px solid #69bea9}.tip,.muted{font-size:13px;color:#72818b;margin:9px 0}.actions{display:flex;justify-content:space-between;gap:10px;margin-top:16px}.hint-box{background:#fff9e8;border:1px solid #f3e3b2;padding:12px;border-radius:11px;margin-top:12px;font-size:14px}.feedback{border-left:4px solid #1b8d72}.feedback h3{margin:0 0 10px}.feedback p{line-height:1.6}.feedback ul{padding-left:20px;line-height:1.7}.feedback .score{font-weight:800;color:#126b55}.feedback button{margin-top:6px}.complete{text-align:center;background:#eef9f2}.complete h2{color:#136a55}.challenge-list{display:grid;gap:12px}.challenge{background:white;border:1px solid #e0e9e4;padding:18px;border-radius:16px}.challenge h3{margin:0 0 6px}.challenge p{color:#687e86;font-size:14px;line-height:1.5}.challenge button{margin-top:8px}.history-item{background:white;border:1px solid #e1e9e4;padding:14px;border-radius:12px;margin:10px 0}.history-item small{display:block;color:#75858c;margin-top:4px}.danger{color:#a14343;margin-top:20px}footer{border-top:1px solid #dce2e0;padding:24px 0 35px;color:#8a999d;text-align:center;font-size:12px}@media(max-width:490px){.shell{padding:0 15px}.persona-grid,.scenario-grid{grid-template-columns:1fr}.stats>div{min-width:0;flex:1;padding:12px}.stats strong{font-size:21px}.stats span{font-size:10px}.hero{padding-top:27px}.actions{flex-direction:column}.actions button{width:100%}.tab{padding:14px 10px;font-size:13px}}