:root{--navy:#184868;--wine:#783838;--ink:#24313a;--pale:#eaf1f5}*{box-sizing:border-box}body{margin:0;background:#f3f5f6;color:var(--ink);font:17px/1.6 system-ui,-apple-system,sans-serif}header{background:var(--navy);color:white;padding:22px max(20px,calc((100% - 1040px)/2));display:flex;gap:18px;align-items:center;border-bottom:5px solid var(--wine)}header img{width:120px;border-radius:4px;background:white;padding:4px}header div div{font-size:13px}main{max-width:1080px;margin:24px auto;padding:28px;background:white;border:1px solid #dae3e7;border-radius:12px}h1,h2,h3{color:var(--navy);line-height:1.3}h1{font-size:30px}h2{font-size:23px;margin-top:28px}h3{font-size:19px}a{color:#155d83;overflow-wrap:anywhere}nav{display:flex;align-items:center;justify-content:space-between;gap:12px}button,.button{background:var(--navy);color:white;border:0;border-radius:7px;padding:12px 16px;cursor:pointer;font:inherit;text-decoration:none;display:inline-block}label{display:block;font-size:14px;font-weight:600;margin-top:14px}input,select,textarea{width:100%;padding:11px;border:1px solid #b7cbd6;border-radius:6px;font:inherit;background:white}input[type=checkbox]{width:auto;margin-right:8px}.note,.case,.result{padding:18px;background:var(--pale);border-left:4px solid var(--navy);border-radius:6px;margin:18px 0}.policy-note{border-color:var(--wine);background:#faf3ee}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.checklist{list-style:none;padding:0}.checklist li{padding:12px 0;border-bottom:1px solid #dce4e8}.checklist li::before{content:'☐';margin-right:12px}details{margin:18px 0;padding:16px;border:1px solid #cddce4;border-radius:8px}summary{font-weight:700;cursor:pointer;color:var(--navy)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:10px;border-bottom:1px solid #dce4e8;text-align:left;vertical-align:top}th{background:var(--pale)}.table-scroll{overflow-x:auto}.error{border-left:4px solid #a02936;background:#fff0ef;padding:14px}.success{background:#edf7ef;padding:14px}.line{display:inline-block;min-width:190px;border-bottom:1px solid #637988;min-height:1.6em}footer{border-top:2px solid var(--wine);margin-top:32px;padding-top:14px;color:#5b6c77;font-size:12px}.muted{font-size:14px;color:#576b79}.worksheet li{margin:24px 0}.answers{margin-top:32px}.source-verified{font-size:14px}svg,img,iframe{max-width:100%}.lesson-content table{display:block;overflow-x:auto}@media(max-width:650px){header{padding:18px}header img{width:90px}main{margin:0;padding:20px 16px;border:0;border-radius:0}.grid{grid-template-columns:1fr}h1{font-size:26px}nav{align-items:flex-start}nav button{font-size:14px}th,td{min-width:110px}}@media print{body{background:white;font-size:11pt}header{padding:12px 0;background:white;color:var(--navy)}header img{width:95px}main{border:0;margin:0;max-width:none;padding:12px 0}.no-print{display:none!important}details{break-inside:avoid}h2,h3{break-after:avoid}.grid{display:block}.checklist li,.worksheet li{break-inside:avoid}.page-break{break-before:page}a{color:var(--navy)}}