.card-button{text-align:left;color:inherit;cursor:pointer}.learning-switch{display:grid;grid-template-columns:1fr 1fr;background:#e9eeeb;border-radius:14px;padding:4px;margin-bottom:15px}.learning-switch button{border:0;background:transparent;padding:10px;border-radius:11px;color:var(--muted);font-size:11px;font-weight:700}.learning-switch button.active{background:#fff;color:var(--green);box-shadow:0 4px 12px rgba(23,55,44,.08)}.study-hero{padding:21px;border-radius:23px;color:#fff;background:linear-gradient(135deg,#123f33,#0a6a50);position:relative;overflow:hidden}.study-hero:after{content:"";position:absolute;width:150px;height:150px;border:28px solid rgba(255,255,255,.07);border-radius:50%;right:-45px;top:-58px}.study-hero .eyebrow{color:#c9e7dc}.study-hero h2{font-size:22px;margin:4px 0 6px;position:relative;z-index:1}.study-hero p{font-size:11px;line-height:1.5;color:#d3e7df;max-width:80%;margin:0}.study-hero button{border:0;background:#fff;color:var(--green);padding:10px 13px;border-radius:11px;font-size:10px;font-weight:700;margin-top:17px;position:relative;z-index:1}.study-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}.study-stat{padding:12px 8px;text-align:center;border:1px solid var(--line);background:#fff;border-radius:14px}.study-stat strong,.study-stat small{display:block}.study-stat strong{font-size:16px;color:var(--green)}.study-stat small{font-size:9px;color:var(--muted);margin-top:3px}.lesson-list{display:grid;gap:9px}.lesson{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:#fff;border-radius:16px;padding:13px}.lesson-icon{width:39px;height:39px;display:grid;place-items:center;border-radius:12px;background:var(--mint);color:var(--green);font-size:17px}.lesson>div{flex:1}.lesson strong,.lesson small{display:block}.lesson strong{font-size:12px}.lesson small{font-size:9px;color:var(--muted);margin-top:3px}.lesson button{border:0;background:#edf5f1;color:var(--green);width:31px;height:31px;border-radius:50%;font-weight:700}.rag-card{margin-top:25px;padding:17px;border-radius:20px;background:#122f28;color:#fff}.rag-head{display:flex;align-items:center;gap:10px}.rag-head>span{width:37px;height:37px;border-radius:12px;display:grid;place-items:center;background:#d1ad5d;color:#17352d;font-weight:700;font-size:11px}.rag-head>div{flex:1}.rag-head .eyebrow{color:#b8d7cc}.rag-head h3{font-size:13px;margin:0}.rag-status{font-size:8px;color:#efd99d;border:1px solid rgba(239,217,157,.35);border-radius:10px;padding:5px 7px}.rag-example{margin:14px 0 10px;padding:11px;border-radius:11px;background:rgba(255,255,255,.07);color:#c6d8d2;font-size:10px;line-height:1.5}.rag-card form{display:flex;gap:7px}.rag-card input{flex:1;min-width:0;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.08);color:#fff;border-radius:11px;padding:11px;font-size:10px}.rag-card form button{width:40px;border:0;border-radius:11px;background:#fff;color:var(--green);font-size:18px}.rag-card>small{display:block;margin-top:8px;color:#91aaa1;font-size:8px}.official-study-source{font-size:9px;line-height:1.5;color:var(--muted);padding:13px;margin-top:12px;border:1px dashed #cfd8d3;border-radius:13px}.official-study-source a{color:var(--green);font-weight:700}.quiz-question h3{font-size:17px;line-height:1.45;margin-bottom:14px}.quiz-options{display:grid;gap:8px}.quiz-options button{border:1px solid var(--line);background:#fff;padding:12px;text-align:left;border-radius:11px;font-size:11px}.quiz-options button.correct{background:#e6f4ec;border-color:#6ba886}.quiz-options button.wrong{background:#fbeceb;border-color:#d58b82}.quiz-feedback{font-size:11px;line-height:1.5;margin-top:12px}