/* A quiet chain field guide. Native controls; no motion or runtime dependency. */
.chains-guide{--ch-accent:#1e575b;--ch-line:#adc1c1;--ch-paper:#f0ede4;--ch-red:#914438;padding-block:30px 78px;color:var(--ink)}
html[data-theme=dark] .chains-guide{--ch-accent:#a7dbd8;--ch-line:#4c7478;--ch-paper:#202c31;--ch-red:#f3b1a5}
.chains-guide a{color:inherit;text-underline-offset:.23em}.chains-guide a:focus-visible,.chains-guide input:focus-visible{outline:3px solid var(--ch-accent);outline-offset:4px}
.ch-breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;font-size:14px;line-height:1.6;color:var(--muted);margin-bottom:44px}
.ch-heading{max-width:880px;margin-inline:auto;text-align:center;margin-bottom:44px}.ch-heading .eyebrow{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--ch-accent);font-size:12px;line-height:1.7;letter-spacing:1.3px}.ch-heading .eyebrow img{flex:none;width:30px;height:30px;filter:brightness(0)}html[data-theme=dark] .ch-heading .eyebrow img{filter:brightness(0) invert(1)}
.ch-heading h1{font:400 clamp(43px,5.5vw,72px)/1.07 var(--serif);letter-spacing:-.035em;text-wrap:balance;margin:24px 0}.ch-heading .lede{font-size:18px;line-height:1.8;max-width:70ch;margin:0 auto}
.ch-inspection{display:grid;grid-template-columns:1.35fr 1fr;gap:38px;align-items:start;margin-bottom:44px}.ch-modern-photo{margin:0;min-width:0}.ch-modern-photo>a:first-child,.ch-history-photo>a{display:block;text-decoration:none}.ch-modern-photo img{display:block;width:100%;height:auto;object-fit:contain;border:1px solid var(--ch-line)}
.ch-modern-photo>a:first-child>span,.ch-history-photo>a>span{display:flex;justify-content:space-between;gap:15px;align-items:center;min-height:44px;border-bottom:1px solid var(--ch-line);font-size:14px;padding-inline:4px}.ch-modern-photo figcaption,.ch-history-photo figcaption{font-size:15px;line-height:1.7;color:var(--muted);margin-top:15px}.ch-gift{font-size:15px;line-height:1.7;padding-left:15px;border-left:2px solid var(--ch-line);margin:20px 0 12px}.ch-review-link{display:inline-flex;align-items:center;gap:20px;min-height:44px;font-size:15px;line-height:1.6}
.ch-field-sheet{background:var(--ch-paper);border:1px solid var(--ch-line);box-shadow:5px 5px 0 color-mix(in srgb,var(--ch-line) 25%,transparent);padding:25px 25px 12px}.ch-field-sheet>.eyebrow{font-size:11px;line-height:1.7;letter-spacing:1.3px;color:var(--ch-accent);margin:0 0 12px}.ch-field-sheet fieldset{padding:0;margin:0;border:0;min-width:0}.ch-field-sheet legend{font:400 29px/1.2 var(--serif);padding:0;max-width:100%}.ch-field-sheet fieldset>p{font-size:14px;line-height:1.7;margin:15px 0 18px}
.ch-check{display:grid;grid-template-columns:24px minmax(0,1fr);gap:13px;align-items:start;border-top:1px solid var(--ch-line);padding-block:13px}.ch-check input{appearance:auto;width:22px;height:22px;margin:3px 0 0;accent-color:var(--ch-red);cursor:pointer}.ch-check label{display:block;min-height:44px;cursor:pointer}.ch-check strong{display:block;font-size:16px;line-height:1.6;font-weight:600}.ch-check span{display:block;font-size:14px;line-height:1.65;margin-top:2px}.ch-check input:checked+label strong{color:var(--ch-red)}
.ch-index{display:flex;flex-wrap:wrap;justify-content:center;gap:0 24px;border-block:1px solid var(--ch-line);padding:13px 0;margin-bottom:24px}.ch-index a{display:flex;align-items:center;min-height:44px;font-size:15px;line-height:1.5;color:var(--ch-accent)}
.ch-reading{max-width:1020px;margin:auto}.ch-section{border-bottom:1px solid var(--ch-line);padding-block:38px;scroll-margin-top:160px}.ch-section-copy{max-width:70ch;margin-inline:auto}.ch-section-number{font:400 25px/1.2 var(--serif);color:var(--ch-accent);margin:0 0 17px}.ch-section h2{font:400 clamp(29px,3vw,39px)/1.2 var(--serif);letter-spacing:-.02em;text-wrap:balance;margin:0 0 24px}.ch-section-copy>p:not(.ch-section-number){font-size:18px;line-height:1.85;margin:0 0 20px}.ch-reading-links{display:flex;flex-wrap:wrap;gap:5px 24px;margin-top:24px}.ch-reading-links a{display:flex;align-items:center;min-height:44px;font-size:15px;line-height:1.6}
.ch-history{display:grid;grid-template-columns:1.2fr .8fr;gap:42px;align-items:start}.ch-history-photo{margin:0;max-width:430px;width:100%;justify-self:center}.ch-history-photo img{display:block;width:100%;height:auto;object-fit:contain;border:1px solid var(--ch-line)}
.ch-next{display:grid;grid-template-columns:1fr 1fr;gap:0 35px;padding-top:38px}.ch-next h2{font:400 32px/1.2 var(--serif);grid-column:1/-1;margin:0 0 24px}.ch-next>a{display:block;min-height:90px;padding:20px 0;border-top:1px solid var(--ch-line);text-decoration:none}.ch-next span{display:block;font-size:14px;line-height:1.7;color:var(--muted)}.ch-next strong{display:block;font:400 28px/1.4 var(--serif);margin-top:10px}.ch-next a:hover strong{text-decoration:underline}
@media(max-width:899px){.ch-inspection,.ch-history{grid-template-columns:1fr;gap:28px}.ch-modern-photo{max-width:680px;margin:auto}.ch-field-sheet{width:100%;box-sizing:border-box}.ch-field-sheet fieldset{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.ch-field-sheet legend,.ch-field-sheet fieldset>p{grid-column:1/-1}.ch-history-photo{max-width:430px}.ch-heading .lede{max-width:60ch}}
@media(max-width:480px){.chains-guide{padding-top:24px}.ch-breadcrumbs{margin-bottom:30px}.ch-heading{text-align:left;margin-bottom:30px}.ch-heading .eyebrow{justify-content:flex-start;align-items:flex-start;font-size:11px;gap:10px}.ch-heading h1{font-size:43px}.ch-heading .lede,.ch-section-copy>p:not(.ch-section-number){font-size:17px}.ch-field-sheet{padding:23px 20px 10px}.ch-field-sheet fieldset{display:block}.ch-index{justify-content:flex-start;gap:0 20px}.ch-history{gap:18px}.ch-next{grid-template-columns:1fr}.ch-section{padding-block:30px}.ch-modern-photo figcaption,.ch-history-photo figcaption{font-size:15px}}
@media(forced-colors:active){.ch-field-sheet{background:Canvas;color:CanvasText;border-color:CanvasText;box-shadow:none}.ch-check input{forced-color-adjust:auto}.ch-check input:checked+label strong{color:CanvasText}.ch-index a{color:LinkText}}
@media print{.ch-field-sheet,.ch-index,.ch-next{display:none}.ch-inspection,.ch-history{display:block}.ch-modern-photo,.ch-history-photo{max-width:500px}.ch-section{break-inside:avoid}}