/* Painted transitions: shallow cinematic crops with one matte glass chapter seal. */
.part-divider.chapter-threshold{position:relative;isolation:isolate;display:flex;align-items:stretch;justify-content:flex-start;flex-direction:row;width:min(940px,calc(100vw - 64px));height:200px;min-height:0;margin:72px 0 52px 50%;padding:0;transform:translateX(-50%);overflow:hidden;border:1px solid var(--glass-rim);border-radius:24px;background:var(--void);box-shadow:0 14px 45px #0003}
.chapter-threshold>img{position:absolute;inset:0;z-index:-2;width:100%;height:100%;display:block;object-fit:cover;max-width:none;margin:0;opacity:.94}
.part-divider.chapter-threshold:before{inset:0;z-index:-1;opacity:1;background:linear-gradient(90deg,rgba(var(--glass-base),.82),transparent 58%),linear-gradient(0deg,#0004,transparent 45%);pointer-events:none}
.chapter-threshold:after{content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;box-shadow:inset 0 1px 0 #ffe6cb70,inset 0 -1px 0 #0009;background:linear-gradient(120deg,#fbd8b608,transparent 38%)}
.threshold-glass{align-self:stretch;position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:7px;min-width:158px;margin:18px;padding:13px 28px;background:var(--cabin);border:1px solid var(--glass-rim);border-radius:15px;box-shadow:inset 0 1px 0 #ffdec433,0 8px 25px #0004}
.threshold-label{color:var(--steel);font:9px/1.4 var(--mono);letter-spacing:.23em;text-transform:uppercase}
.chapter-threshold .threshold-glass .numeral{font:54px/.95 var(--display)!important;color:var(--bone);letter-spacing:-.04em}
.threshold-ember{display:block;width:26px;height:1px;background:var(--ember-2);margin-top:6px;box-shadow:0 0 9px var(--ember)}
/* One local Loupe canvas moves between visible thresholds, below the opaque text seal. */
.chapter-threshold{scroll-margin-top:120px}
.chapter-threshold>canvas[data-loupe]{position:absolute;inset:0;z-index:0;width:100%;height:100%;pointer-events:none;opacity:.42;mix-blend-mode:screen;mask-image:linear-gradient(90deg,transparent 10%,#000 34%,#000 92%,transparent);border-radius:inherit}
.chapter-threshold .threshold-glass{z-index:1}
.chapter-threshold>canvas[data-loupe][hidden]{display:none}
.part-divider.chapter-threshold.double-rule{border-top:3px double var(--glass-rim);border-bottom:3px double var(--glass-rim)}
@media(max-width:1000px){.part-divider.chapter-threshold{width:min(880px,calc(100vw - 48px))}}
@media(max-width:700px){.part-divider.chapter-threshold{width:100%;height:162px;margin:48px 0 36px;transform:none;border-radius:20px}.threshold-glass{min-width:105px;margin:12px;padding:14px}.chapter-threshold .threshold-glass .numeral{font-size:43px!important}.threshold-label{font-size:8px}}
@media print{.part-divider.chapter-threshold{width:auto;height:auto;min-height:0;transform:none;margin:24px 0 12px;border:0;border-radius:0;box-shadow:none;background:#fff}.chapter-threshold>img,.chapter-threshold>canvas[data-loupe],.chapter-threshold:before,.chapter-threshold:after,.threshold-ember{display:none!important}.threshold-glass{display:flex;flex-direction:row;gap:15px;margin:0;padding:0;border:0;border-radius:0;background:#fff;box-shadow:none}.threshold-label,.chapter-threshold .threshold-glass .numeral{color:#111}}