:root{--navy:#123f57;--blue:#145f83;--teal:#0c726d;--muted:#536977;--line:#dce7ea;--paper:#f5f8f9;--red:#a73139}*{box-sizing:border-box}body{margin:0;color:var(--navy);background:var(--paper);font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif}button,select{font:inherit}button,a,select,summary{touch-action:manipulation}button{cursor:pointer;border:0;border-radius:11px;padding:12px 19px;font-weight:650;background:#e9f0f3;color:var(--navy)}button:disabled{cursor:default;opacity:.5}a{color:var(--blue)}:focus-visible{outline:3px solid #c97518;outline-offset:4px}.skip{position:absolute;left:8px;top:-80px}.skip:focus{top:0;background:white;z-index:50}header{padding:25px max(5vw,20px);background:white;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:15px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;font-weight:750;color:var(--navy)}.brand small{display:block;font-size:12px;font-weight:450;color:var(--muted)}.logo{background:var(--navy);color:white;padding:12px 8px;border-radius:12px;font-size:20px}.pill{padding:7px 13px;border-radius:99px;background:#edf6f6;font-size:12px}main{max-width:1200px;margin:auto;padding:0 26px 60px}.hero{padding:56px 0 38px;display:grid;grid-template-columns:1.4fr 1fr;gap:65px;align-items:center}.eyebrow{font-size:11px;letter-spacing:1.8px;font-weight:750;color:var(--teal)}h1{font-size:clamp(32px,4vw,49px);line-height:1.15;letter-spacing:-1.5px;margin:18px 0 20px}h2{font-size:27px;line-height:1.25;margin:10px 0 22px}h3{font-size:19px;line-height:1.4}p{margin:12px 0;color:var(--muted)}.hero p{max-width:540px}.primary{background:var(--teal);color:white}.primary:hover{background:#075b58}.secondary{background:white;border:1px solid var(--line)}.hero .primary{margin-top:12px}.hero-card{background:var(--navy);color:white;padding:30px;border-radius:25px;box-shadow:0 16px 38px #123f5712}.hero-card .eyebrow{color:#9ee5dc}.hero-card p{color:#c2d4dd;font-size:13px}.stats{display:flex;gap:30px;margin:30px 0 20px}.stats b{display:block;font-size:34px;font-weight:650}.stats span{font-size:12px;color:#c2d4dd}progress{width:100%;height:8px;accent-color:#56c9ba}.notice{border:1px solid var(--line);border-left:4px solid #69aaa7;background:white;border-radius:12px;padding:16px 20px;font-size:13px;color:var(--muted)}.tabs{display:flex;gap:6px;margin:33px 0 35px;border-bottom:1px solid var(--line);padding-bottom:12px;overflow-x:auto}.tabs button{white-space:nowrap;background:transparent;font-size:14px}.tabs [aria-current]{background:var(--navy);color:white}.tabs span{font-size:12px;margin-left:3px}.sectionhead{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:12px}label{display:block;font-size:12px;font-weight:650;color:var(--muted)}select{display:block;max-width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:white;color:var(--navy);margin-top:5px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.quiz-options article,.info,.question,.result,.errorItem{background:white;border:1px solid var(--line);padding:24px;border-radius:17px}.card{display:flex;flex-direction:column;align-items:start}.card:hover{border-color:#74aaa7;box-shadow:0 6px 20px #123f5709}.card .number{font-size:12px;color:var(--teal);font-weight:750;display:flex;justify-content:space-between;width:100%}.card h3{margin:12px 0}.card p{font-size:13px;margin:0 0 20px}.card button{margin-top:auto;font-size:13px}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:20px}.quiz-options button{margin-top:20px}.quiz-options select{width:100%}.info{margin-bottom:18px}.info h3:first-child{margin-top:0}#sources li{margin:12px 0;font-size:14px}#quizArea{margin-top:25px}.question h3{font-size:22px}.quiz-meta{display:flex;justify-content:space-between;gap:20px;font-size:13px}.answers{display:grid;gap:12px;margin:20px 0}.answer{text-align:left;background:white;border:1px solid var(--line);font-weight:450}.answer.selected{border:2px solid var(--blue);background:#eef7fc}.answer.correct{border:2px solid var(--teal);background:#eef9f5}.answer.wrong{border:2px solid var(--red);background:#fff0f1}.explanation{padding:16px;border-radius:9px;background:#eef7f4;margin:18px 0}.quizControls{display:flex;gap:10px;flex-wrap:wrap}.errorItem{margin-top:15px}.errorItem p{font-size:14px}.result strong.score{font-size:40px;display:block;color:var(--teal)}.result details{border-top:1px solid var(--line);padding:15px 0}.result summary{font-weight:600;cursor:pointer}.result details p{font-size:14px}footer{background:white;border-top:1px solid var(--line);padding:25px 5vw;display:flex;justify-content:space-between;font-size:13px}footer span{color:var(--muted)}dialog{border:0;border-radius:22px;max-width:760px;width:calc(100% - 28px);max-height:90dvh;padding:35px;color:var(--navy);overflow:auto}dialog::backdrop{background:#092838b8;backdrop-filter:blur(4px)}.close{position:absolute;right:15px;top:12px;font-size:25px;padding:0 10px;background:white}.audio{background:var(--paper);padding:18px;border-radius:13px;display:flex;flex-wrap:wrap;gap:15px;align-items:end}.audioBtns{display:flex;flex-wrap:wrap;gap:7px}.audio button{font-size:13px;padding:10px 14px}.audio p{flex-basis:100%;font-size:12px;margin:0}.audio label{max-width:100%}.audio select{max-width:240px}.lessonText{font-size:18px;line-height:1.85;margin:25px 0}.remember{padding:18px 22px;background:#e9f5f1;border-radius:13px}.remember p{margin:5px 0 0}.case{margin:25px 0}.case details{padding:15px;background:var(--paper);border-radius:10px}.case summary{cursor:pointer}.source{font-size:12px}.lessonActions{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}[hidden]{display:none!important}@media(max-width:850px){.grid{grid-template-columns:repeat(2,1fr)}.hero{gap:25px;grid-template-columns:1fr 1fr}.stats{gap:20px}.stats b{font-size:28px}.hero-card{padding:25px}}@media(max-width:600px){header{padding:16px 20px}.pill{display:none}main{padding:0 18px 40px}.hero{grid-template-columns:1fr;padding-top:32px;gap:25px}.hero-card{padding:20px}.stats{margin:15px 0}.sectionhead{display:block}.sectionhead label{margin-bottom:20px}.sectionhead select{width:100%}.grid,.quiz-options{grid-template-columns:1fr}.card{padding:22px}.card h3{font-size:20px}.tabs{margin-top:24px;gap:2px}.tabs button{padding:11px 13px}.notice{font-size:12px}dialog{padding:28px 22px}.audio{padding:14px}.audioBtns{width:100%}.audio select{max-width:100%}footer{display:block}footer span{display:block;margin-top:5px}}

.studyFilters{display:flex;gap:12px;align-items:end}.studyFilters input{display:block;font:inherit;padding:11px 12px;margin-top:5px;border:1px solid var(--line);border-radius:8px;color:var(--navy);background:white;max-width:100%;width:240px}.sectionhead{align-items:center}.studyFilters select{max-width:240px}.voiceHint{line-height:1.5}@media(max-width:850px){.sectionhead{display:block}.studyFilters{margin-bottom:20px}.studyFilters label{flex:1}.studyFilters input,.studyFilters select{width:100%;max-width:100%}}@media(max-width:600px){.studyFilters{display:block}.studyFilters label{margin-bottom:12px}}