:root{color-scheme:light;--ink:#172b3c;--muted:#5c6e7e;--line:#dbe3eb;--paper:#fff;--page:#f3f6f9;--record:#0d6a73;--record-bg:#e0f2f1;--control:#275eaa;--control-bg:#e8f0fc;--jtag:#684ca9;--jtag-bg:#eee9fa;--ground:#516577;--ground-bg:#e9eef2;--reference:#86601b;--reference-bg:#fff1d5;--power:#a8492d;--power-bg:#ffeadf;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
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.clock-brief{scroll-margin-top:25px;display:grid;grid-template-columns:minmax(210px,.6fr) minmax(0,1.4fr);gap:12px 28px;margin-top:18px;padding:22px 25px;background:#e8f0f4;border-left:4px solid #4e8099}.clock-heading h3{font-size:1.48rem;margin:0 0 10px}.clock-heading>p:not(.eyebrow),.clock-grid p,.clock-choice{font-size:.77rem;line-height:1.55;color:#4b6272;margin:0}.clock-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.clock-grid>div{border-top:2px solid #adc4d0;padding-top:9px}.clock-grid strong,.clock-choice strong{font-size:.78rem;color:#243f52}.clock-grid p{margin-top:6px}.clock-choice{grid-column:1/-1;border-top:1px solid #bfd1dc;padding-top:11px;margin-top:3px}
.comparison-section{padding-top:72px}.table-wrap{overflow-x:auto;background:white;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;font-size:.78rem}thead{background:#eaf0f5}th,td{text-align:left;vertical-align:top;padding:14px 15px;border-bottom:1px solid #e3e9ee}thead th{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:#566b7d}tbody tr:last-child>*{border-bottom:0}tbody tr{cursor:pointer}tbody tr:hover,tbody tr[data-highlight=true]{background:#f0f7fa}tbody tr[data-selected=true]{background:#e7f2f6;box-shadow:inset 4px 0 #245f7c}tbody th{font-size:1.05rem;font-variant-numeric:tabular-nums;color:#24465b;width:70px}tbody td:nth-child(2){min-width:320px}tbody td:nth-child(3){min-width:170px;color:#405769}tbody td:nth-child(4){min-width:175px;color:#526574}td strong{font-weight:750}td small{display:block;color:#60717e;font-size:.7rem;line-height:1.45;margin-top:3px}.role{display:inline-block;font-size:.59rem;font-weight:770;letter-spacing:.06em;text-transform:uppercase;padding:4px 6px;border-radius:3px;margin-right:9px}.role-record{color:var(--record);background:var(--record-bg)}.role-control{color:var(--control);background:var(--control-bg)}.role-jtag{color:var(--jtag);background:var(--jtag-bg)}.role-ground{color:var(--ground);background:var(--ground-bg)}.role-reference{color:var(--reference);background:var(--reference-bg)}.role-power{color:var(--power);background:var(--power-bg)}.shell-note{font-size:.8rem;line-height:1.6;margin:14px 0 0;color:#526574}
.next-section{display:grid;grid-template-columns:minmax(210px,.6fr) minmax(0,1.4fr);gap:40px;padding:72px 0;border-bottom:1px solid var(--line)}.next-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.next-grid>div{border-top:2px solid #9bb6c4;padding-top:14px}.next-grid strong{font-size:.87rem}.next-grid p{font-size:.76rem;line-height:1.62;color:var(--muted);margin:7px 0 0}.page-footer{display:flex;justify-content:space-between;gap:25px;padding-top:27px;font-size:.73rem;line-height:1.6;color:var(--muted)}.page-footer strong{color:var(--ink)}.page-footer p{margin:5px 0 0}.page-footer>a{white-space:nowrap;font-weight:700}
@media(max-width:1150px){.diagram-grid{grid-template-columns:1fr}.datasheet-card{display:block}.pdf-shell{height:520px}.pin-card{padding:26px 30px}.clock-brief,.next-section{grid-template-columns:1fr;gap:25px}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.pin{transition:none}}
@media print{body{background:white}.site-header nav,.intro-actions,.pdf-controls,.pin-detail,.skip-link{display:none}.site-header,main{max-width:none;padding:0 15mm}.intro{padding:8mm 0}.intro h1{font-size:33pt}.scope-note{box-shadow:none;border:1px solid var(--line)}.safety-callout{margin:6mm 0 9mm}.diagram-grid{grid-template-columns:1fr 1fr}.pin-card,.datasheet-card{padding:4mm;break-inside:avoid}.pin{height:6mm;font-size:7pt}.pin-row{gap:1mm}.diagram-wrap{padding:3mm}.pdf-shell{height:75mm}.comparison-section{padding-top:8mm}.table-wrap{overflow:visible}.next-section{padding:10mm 0}thead{display:table-header-group}tr{break-inside:avoid}}
.revision-notice{max-width:1320px;margin:16px auto 0;padding:13px 18px;border-left:4px solid #b88543;background:#fff7e9;color:#5c492f;font-size:12px;line-height:1.6}
.revision-notice a{font-weight:700;margin-left:5px}