.u20-page{--ink:#18374c;--blue:#006995;--line:#ccdbe4;color:var(--ink);background:#fff;font:17px/1.7 Arial,Helvetica,sans-serif;max-width:1160px;margin:auto;padding:28px 24px;overflow-wrap:anywhere}.u20-page *{box-sizing:border-box}.u20-page h1,.u20-page h2,.u20-page h3{color:var(--ink);font-family:inherit;line-height:1.2;letter-spacing:-.015em}.u20-page h1{font-size:clamp(30px,3.7vw,45px);margin:12px 0 20px}.u20-page h2{font-size:30px;margin:10px 0 24px}.u20-page h3{font-size:22px;margin:28px 0 12px}.u20-page p{margin:0 0 18px}.u20-page a{color:#006995;text-decoration:underline;text-underline-offset:3px}.u20-page a:focus-visible,.u20-page summary:focus-visible{outline:3px solid #c2510b;outline-offset:4px}.u20-hero{display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:center;padding:20px 0 35px;border-bottom:3px solid var(--blue)}.u20-page .u20-kicker{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#006995}.u20-lead{font-size:21px;line-height:1.55}.u20-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.u20-page a.u20-button,.u20-page a.u20-button:visited{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 18px;background:#b74b09;color:#fff;font-weight:700;text-decoration:none;border:2px solid #b74b09;border-radius:4px}.u20-page a.u20-button:hover{background:#933900}.u20-secondary{padding:12px 8px;font-weight:700}.u20-nav{display:flex;flex-wrap:wrap;gap:12px 24px;padding:18px 0;border-bottom:1px solid var(--line);font-size:15px}.u20-page section{padding:38px 0;border-bottom:1px solid var(--line);scroll-margin-top:35px}.u20-page figure{margin:20px 0 26px;min-width:0}.u20-page img{display:block;width:100%;height:auto;border:1px solid var(--line)}.u20-page figcaption{font-size:13px;color:#465f70;padding:9px 0;line-height:1.5}.u20-page .u20-photo{max-width:448px;margin:auto}.u20-two{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:start}.u20-table{overflow:auto;margin:24px 0;max-width:100%}.u20-page table{width:100%;border-collapse:collapse;min-width:640px;font-size:16px}.u20-page th,.u20-page td{text-align:left;vertical-align:top;padding:15px;border:1px solid var(--line)}.u20-page thead th{background:#eaf3f7;color:#18374c;-webkit-text-fill-color:#18374c}.u20-page tbody th{width:23%;color:#18374c;background:#f7fafb}.u20-page .u20-instrument{background:#f2f7fa;padding:30px 24px;margin:20px 0;border:1px solid var(--line)}.u20-equation{padding:16px;border-left:4px solid var(--blue);background:white;font-family:monospace;font-size:16px}.u20-note{padding:0 24px 12px;border-left:4px solid #c7864b;background:#fcf9f5}.u20-close{background:#edf4f8;border-top:3px solid var(--blue);padding:0 24px 24px;margin-top:28px}.u20-page details{border-top:1px solid var(--line);padding:18px 0}.u20-page summary{cursor:pointer;font-weight:bold;padding:4px 0}.u20-page details p{margin:14px 0 0}
.u20-tool{font:16px/1.6 Arial,sans-serif;color:#18374c;background:white;padding:24px;border:1px solid #b9d0dd}.u20-tool h3,.u20-tool h4{color:#18374c!important;-webkit-text-fill-color:#18374c}.u20-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:20px 0}.u20-fields label{display:block;font-weight:600;color:#18374c}.u20-fields input,.u20-fields select,.u20-fields textarea{display:block;width:100%;min-height:46px;color:#18374c;background:#fff;border:1px solid #718b9d;border-radius:3px;padding:10px;font:inherit;margin-top:6px}.u20-tool .u20-btn{border:1px solid #006995;background:#006995;color:#fff;-webkit-text-fill-color:#fff;border-radius:3px;min-height:46px;padding:10px 16px;font:700 15px/1.4 Arial,sans-serif;cursor:pointer;margin:4px 8px 4px 0}.u20-tool .u20-btn:hover{background:#004b6b}.u20-tool .u20-btn:disabled{background:#edf1f4;color:#4f6371;-webkit-text-fill-color:#4f6371;border-color:#96a9b6;cursor:not-allowed}.u20-tool :focus-visible{outline:3px solid #b74b09;outline-offset:3px}.u20-note-text{font-size:14px;color:#496274}.u20-result{margin:20px 0;padding:18px;background:#edf5f8;border-left:4px solid #006995}.u20-metrics{display:grid;grid-template-columns:1fr 1.4fr;gap:0;margin:10px 0}.u20-metrics dt,.u20-metrics dd{padding:12px 6px;margin:0;border-bottom:1px solid #c9dce8;overflow-wrap:anywhere}.u20-metrics dt{font-weight:700}.u20-wide{grid-column:1/-1}
@media(max-width:700px){.u20-page{padding:18px 16px;font-size:17px}.u20-hero,.u20-two{grid-template-columns:1fr;gap:16px}.u20-page h2{font-size:26px}.u20-page .u20-instrument{padding:24px 12px}.u20-fields,.u20-metrics{grid-template-columns:1fr}.u20-metrics dt{border:0;padding-bottom:0}.u20-tool{padding:18px 12px}.u20-page section{padding-top:30px;padding-bottom:30px}.u20-tool .u20-btn{width:100%;margin:5px 0}.u20-hero .u20-actions a{width:100%;text-align:center}.u20-nav{gap:10px 16px}.u20-page .u20-photo{max-width:360px}}
@media print{.u20-page{max-width:none;font-size:11pt}.u20-nav,.u20-actions,.u20-tool .u20-btn{display:none}.u20-table{overflow:visible}.u20-page table{min-width:0}.u20-page section{break-inside:auto}.u20-page figure{break-inside:avoid}}

.u20-page .u20-small-photo{max-width:271px}

.u20-intro{padding:12px 0 24px;border-bottom:3px solid #006995}.u20-split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.u20-page h1{max-width:940px;font-size:clamp(29px,3.3vw,41px)}.u20-caption{font-size:14px;color:#496274}.u20-steps{padding-left:28px;max-width:950px}.u20-steps li{padding:5px 0 12px}.u20-handoff{margin-top:28px;border-left:4px solid #006995;padding:2px 24px 18px;background:#f0f6f9}.u20-page a.rp-button,.u20-page a.rp-button:visited{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 20px;background:#b74b09;color:#fff!important;-webkit-text-fill-color:#fff!important;text-decoration:none;font-weight:700;border-radius:3px}.u20-page a.rp-button:hover{background:#933900}.u20-page [data-pcbs-tool]{min-width:0}.u20-page .u20-note-text{font-size:14px}#raypcb-page .u20-page table thead th,#raypcb-page .u20-page table tbody th{color:#18374c!important;-webkit-text-fill-color:#18374c!important;background:#eaf3f7!important}#raypcb-page .u20-page .u20-tool .u20-btn{color:#fff!important;-webkit-text-fill-color:#fff!important;background:#006995!important}#raypcb-page .u20-page .u20-tool .u20-btn:disabled{color:#4f6371!important;-webkit-text-fill-color:#4f6371!important;background:#edf1f4!important}#raypcb-page .u20-page .u20-tool .u20-btn:not(:disabled):hover{background:#004b6b!important}@media(max-width:700px){.u20-split{grid-template-columns:1fr}.u20-page .u20-handoff{padding:2px 16px 16px}.u20-page a.rp-button{width:100%}}
.u20-page{max-width:1120px;margin:0 auto;padding:24px 18px}.u20-page .u20-eyebrow{font-size:13px;letter-spacing:.08em;font-weight:700;color:#006995}.u20-page .u20-lead{font-size:20px;max-width:960px}.u20-page nav{display:flex;gap:12px 24px;flex-wrap:wrap;padding-top:12px}.u20-page .u20-spread{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:start}.u20-page .u20-spread figure{margin:0}.u20-page .u20-formula{border-left:4px solid #006995;background:#edf5f8;padding:16px 22px;margin:20px 0}.u20-formula span{display:block;font-size:15px;margin-top:7px}.u20-procedure{padding-left:28px}.u20-procedure li{padding:7px 0 15px}.u20-scroll{overflow-x:auto;max-width:100%;margin:24px 0}.u20-page .u20-scroll table{min-width:590px}.u20-page figure img{display:block;width:100%;height:auto}.u20-page figcaption{font-size:14px;line-height:1.6;color:#4b6678}.u20-page section{scroll-margin-top:24px}.u20-page p{max-width:1000px}.u20-page details{border-top:1px solid #c7d6df;padding:16px 0}.u20-page summary{font-weight:700;cursor:pointer}.u20-page :focus-visible{outline:3px solid #b74b09;outline-offset:4px}.u20-page .u20-tool label{display:block;color:#17374b!important;-webkit-text-fill-color:#17374b!important}.u20-page .u20-tool select,.u20-page .u20-tool input{background:#fff!important;color:#17374b!important;-webkit-text-fill-color:#17374b!important;min-height:46px}.u20-page .u20-tool button{touch-action:manipulation}@media(max-width:800px){.u20-page .u20-spread{display:block}.u20-page .u20-spread figure{margin-top:18px}}@media(max-width:600px){.u20-page{padding:16px 12px}.u20-page .u20-lead{font-size:18px}.u20-page nav{gap:10px 18px}.u20-page .u20-formula{padding:14px}.u20-page .u20-fields{grid-template-columns:1fr}.u20-page .u20-actions{flex-wrap:wrap}.u20-page .u20-actions button{flex:1 1 160px}}
.u20-page{max-width:1180px}.u20-page .u20-header{border-bottom:3px solid #006995;padding:12px 0 24px;margin-bottom:8px}.u20-page .u20-header h1{max-width:980px;font-size:clamp(29px,3.3vw,44px)}.u20-page .u20-header>p:first-of-type{font-size:20px;line-height:1.6}.u20-page .u20-header p{max-width:900px}.u20-page .u20-review-date{font-size:13px;color:#4b6678}.u20-page .u20-hero-grid{display:grid;grid-template-columns:1.08fr 1fr;gap:28px;align-items:start}.u20-page .u20-hero-grid figure{margin:0}.u20-page .u20-hero-grid h1{font-size:clamp(29px,3.1vw,40px)}.u20-page nav{padding:18px 0;border-bottom:1px solid #ccdbe4}.u20-page .u20-chapter{padding:32px 0}.u20-page .u20-chapter h2{font-size:28px}.u20-sequence .u20-chapter{border-left:2px solid #c3d8e3;padding-left:26px;margin-left:7px}.u20-reference .u20-chapter>p,.u20-reference .u20-chapter>h3{max-width:850px}.u20-reference .u20-chapter h2{border-left:5px solid #006995;padding-left:16px}.u20-casebook .u20-chapter:nth-of-type(3n){background:#f6f9fb;padding:28px 22px}.u20-workbench .u20-instrument{border-top:4px solid #006995;background:#f2f7fa}.u20-drawing .u20-chapter>figure{max-width:960px;margin-left:auto;margin-right:auto}.u20-selection .u20-scroll{border-top:3px solid #006995}.u20-page .u20-guide{background:#f7fafb;border-left:3px solid #819bab;padding:15px 18px;margin:16px 0}.u20-page .u20-guide p{font-size:15px;margin:0}.u20-page .u20-tool label{color:#17374b!important;-webkit-text-fill-color:#17374b!important}.u20-page h1,.u20-page h2,.u20-page h3,.u20-page h4{color:#17374b!important;-webkit-text-fill-color:#17374b!important}.u20-page th{color:#17374b!important;-webkit-text-fill-color:#17374b!important;background:#edf4f8!important}.u20-page .u20-tool input,.u20-page .u20-tool select,.u20-page .u20-tool textarea{color:#17374b!important;-webkit-text-fill-color:#17374b!important;background:#fff!important;max-width:100%}.u20-page img{aspect-ratio:1000/540}.u20-page .u20-file-hint{font-size:14px}.u20-page section:target{scroll-margin-top:24px}.u20-page figure a{display:block}.u20-page .u20-actions{align-items:stretch}.u20-page .u20-actions>a{display:inline-flex;align-items:center;justify-content:center}.u20-page .u20-chapter p{line-height:1.75}.u20-page .u20-tool{box-shadow:none;border-radius:3px}.u20-page .u20-tool .u20-result{min-height:86px}.u20-page .u20-tool dl{font-size:16px}.u20-page .u20-tool .u20-btn{min-height:46px}.u20-page .u20-scroll{overflow-x:auto;max-width:100%;margin:24px 0}.u20-page .u20-tool .u20-btn{color:#fff!important;-webkit-text-fill-color:#fff!important;background:#006995!important}.u20-page .u20-tool .u20-btn:disabled{color:#4f6371!important;-webkit-text-fill-color:#4f6371!important;background:#edf1f4!important}.u20-page .u20-scroll:focus-visible{outline:3px solid #b74b09;outline-offset:3px}.u20-page .u20-cta{border-top:3px solid #006995;background:#eff5f8;padding:22px;margin:28px 0}.u20-page .u20-cta h2{font-size:25px}.u20-page .u20-cta p{max-width:900px}
@media(max-width:850px){.u20-page .u20-hero-grid{display:block}.u20-page .u20-hero-grid figure{margin:18px 0}.u20-page{padding:20px 16px}.u20-page .u20-chapter h2{font-size:26px}}
@media(max-width:600px){.u20-page .u20-header>p:first-of-type{font-size:18px}.u20-sequence .u20-chapter{margin-left:0;padding-left:14px}.u20-casebook .u20-chapter:nth-of-type(3n){padding:22px 12px}.u20-page .u20-cta{padding:18px 12px}.u20-page .u20-actions>a{width:100%}.u20-page .u20-guide{padding:14px}.u20-page nav a{padding:5px 0}.u20-page .u20-chapter{padding-top:26px;padding-bottom:26px}}
@media(prefers-reduced-motion:reduce){.u20-page *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
