/* ============================================================
   CAV PATHOLOGY · IHD · §5 "Reperfusion & Contraction Band Necrosis"
   Scoped to #cavIhdMiPathologyTopicContent. Content card reusing the
   designed-card language: header band, two-column contrast (divider),
   mechanism grid, arrow-chain chips, the FOCAL histology image +
   recognition callout, pearl. One card level (header/pearl are tinted
   bands; middle zones are flat blocks). All reader text #111 on light
   surfaces (histology image legible in light AND dark mode).
   ============================================================ */

#cavIhdMiPathologyTopicContent .crb { display: grid; gap: 20px; }

/* ---- Phase 1 header band (accent tint) ---- */
#cavIhdMiPathologyTopicContent .crb-head {
    display: grid; gap: 8px; padding: 16px 18px; border-radius: 14px; border-left: 4px solid var(--mi-accent, #9a1f17);
    background: #fbeaea; background: color-mix(in srgb, var(--mi-accent, #9a1f17) 8%, #ffffff);
}
#cavIhdMiPathologyTopicContent .crb-name { font-size: 19px; font-weight: 850; color: #111111; letter-spacing: -.015em; }
#cavIhdMiPathologyTopicContent .crb-ic { font-style: normal; }
#cavIhdMiPathologyTopicContent .crb-essence { margin: 0; font-size: 14.5px; font-weight: 600; color: #111111; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-essence strong { color: #111111; }
#cavIhdMiPathologyTopicContent .crb-callback { margin: 0; font-size: 13.5px; color: #111111; line-height: 1.45; }
#cavIhdMiPathologyTopicContent .crb-how { margin: 0; font-size: 13px; color: #111111; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-how strong { color: #111111; }
#cavIhdMiPathologyTopicContent .crb-muted { color: #6b7280; }

/* ---- beats + labels ---- */
#cavIhdMiPathologyTopicContent .crb-beat { display: grid; gap: 11px; }
#cavIhdMiPathologyTopicContent .crb-beat-label { display: flex; align-items: center; gap: 7px; color: #111111; font-size: 17px; font-weight: 850; letter-spacing: -.01em; }

/* calcium through-line — consistent emphasis in both mechanisms + chain */
#cavIhdMiPathologyTopicContent .crb-ca { font-weight: 800; color: #9a1f17; background: #fdeede; border-radius: 5px; padding: 0 4px; }

/* boxed emphasis container (two-faces contrast, recognition callout) */
#cavIhdMiPathologyTopicContent .crb-box { display: grid; gap: 11px; padding: 15px 17px; border: 1px solid rgba(15, 23, 42, .14); border-radius: 14px; background: #ffffff; }

/* ---- Phase 2 two-column contrast (divider; stacks on mobile) ---- */
#cavIhdMiPathologyTopicContent .crb-two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
#cavIhdMiPathologyTopicContent .crb-col-injure { border-left: 1px solid rgba(15, 23, 42, .14); padding-left: 20px; }
#cavIhdMiPathologyTopicContent .crb-col-h { font-size: 14px; font-weight: 850; color: #111111; margin-bottom: 4px; }
#cavIhdMiPathologyTopicContent .crb-col-save .crb-col-h { color: #047857; }
#cavIhdMiPathologyTopicContent .crb-col-injure .crb-col-h { color: #9a1f17; }
#cavIhdMiPathologyTopicContent .crb-col p { margin: 0; color: #111111; font-size: 14px; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-col p strong { color: #111111; }

/* ---- Phase 3 mechanisms — four squares, each with a "Mechanism" dropdown ---- */
#cavIhdMiPathologyTopicContent .crb-mech { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 0; }
#cavIhdMiPathologyTopicContent .crb-mech-card { display: flex; flex-direction: column; gap: 6px; padding: 12px; border: 1px solid rgba(15, 23, 42, .14); border-radius: 12px; background: #fff; }
#cavIhdMiPathologyTopicContent .crb-mech-name { font-size: 13.5px; font-weight: 850; color: #111111; letter-spacing: -.01em; }
#cavIhdMiPathologyTopicContent .crb-mech-brief { margin: 0; color: #111111; font-size: 12.5px; line-height: 1.4; }
#cavIhdMiPathologyTopicContent .crb-mech-dd { margin-top: auto; }
#cavIhdMiPathologyTopicContent .crb-mech-dd > summary {
    cursor: pointer; list-style: none; font-size: 11.5px; font-weight: 800; color: var(--mi-accent, #9a1f17);
    margin-top: 8px; padding-top: 8px; border-top: 1px solid rgba(15, 23, 42, .1); display: inline-flex; align-items: center; gap: 4px;
}
#cavIhdMiPathologyTopicContent .crb-mech-dd > summary::-webkit-details-marker { display: none; }
#cavIhdMiPathologyTopicContent .crb-mech-dd > summary::after { content: "▾"; font-size: 10px; transition: transform .15s ease; }
#cavIhdMiPathologyTopicContent .crb-mech-dd[open] > summary::after { transform: rotate(180deg); }
#cavIhdMiPathologyTopicContent .crb-mech-dd p { margin: 7px 0 0; color: #111111; font-size: 12.5px; line-height: 1.45; }
#cavIhdMiPathologyTopicContent .crb-mech-result { margin: 12px 0 0; color: #111111; font-size: 14px; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-mech-result strong { color: #111111; }

/* ---- Phase 4 arrow-chain chips (hover detail) ---- */
#cavIhdMiPathologyTopicContent .crb-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; }
#cavIhdMiPathologyTopicContent .crb-chip {
    position: relative; appearance: none; font: inherit; cursor: help; color: #111111;
    background: #f6f8fc; background: color-mix(in srgb, var(--mi-accent, #9a1f17) 7%, #ffffff);
    border: 1px solid #e2e8f0; border-color: color-mix(in srgb, var(--mi-accent, #9a1f17) 26%, #ffffff);
    border-radius: 9px; padding: 6px 10px; font-size: 13px; font-weight: 600; line-height: 1.2;
}
#cavIhdMiPathologyTopicContent .crb-chip:hover { background: color-mix(in srgb, var(--mi-accent, #9a1f17) 14%, #ffffff); }
#cavIhdMiPathologyTopicContent .crb-chip:focus-visible { outline: 2px solid var(--mi-accent, #9a1f17); outline-offset: 2px; }
#cavIhdMiPathologyTopicContent .crb-arrow { color: var(--mi-accent, #9a1f17); font-weight: 800; }
#cavIhdMiPathologyTopicContent .crb-tip {
    position: absolute; left: 50%; bottom: calc(100% + 9px); transform: translate(-50%, 4px);
    width: 250px; max-width: 72vw; z-index: 60; background: #0f172a; color: #fff; text-align: left;
    font-size: 12.5px; font-weight: 500; line-height: 1.5; padding: 9px 11px; border-radius: 9px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .28); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .15s ease;
}
#cavIhdMiPathologyTopicContent .crb-tip::after { content: ""; position: absolute; top: 100%; left: var(--tip-arrow, 50%); transform: translateX(-50%); border: 6px solid transparent; border-top-color: #0f172a; }
#cavIhdMiPathologyTopicContent .crb-chip:hover .crb-tip, #cavIhdMiPathologyTopicContent .crb-chip:focus .crb-tip, #cavIhdMiPathologyTopicContent .crb-chip:focus-within .crb-tip { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
/* emphasized timing callout (the time point is the headline) */
#cavIhdMiPathologyTopicContent .crb-timing {
    display: flex; align-items: center; gap: 12px; margin: 2px 0 0; padding: 11px 15px; border-radius: 12px;
    background: color-mix(in srgb, var(--mi-accent, #9a1f17) 9%, #fff); border: 1px solid color-mix(in srgb, var(--mi-accent, #9a1f17) 26%, #fff);
}
#cavIhdMiPathologyTopicContent .crb-timing-ic { font-size: 20px; flex: none; }
#cavIhdMiPathologyTopicContent .crb-timing-body { color: #111111; font-size: 14px; line-height: 1.45; }
#cavIhdMiPathologyTopicContent .crb-timing-when { font-size: 19px; font-weight: 850; color: var(--mi-accent, #9a1f17); letter-spacing: -.01em; }

/* ---- Phase 5 recognition row: sized preview (click → lightbox) + boxed callout ---- */
#cavIhdMiPathologyTopicContent .crb-recog-row { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 18px; align-items: start; }
#cavIhdMiPathologyTopicContent .crb-figure { margin: 0; display: grid; gap: 6px; }
/* sized preview — big enough to read, click to enlarge (native 4272×2848) */
#cavIhdMiPathologyTopicContent .crb-figure-btn { position: relative; appearance: none; display: block; width: 100%; padding: 6px; cursor: zoom-in; background: #fff; border: 1px solid rgba(15, 23, 42, .14); border-radius: 12px; }
#cavIhdMiPathologyTopicContent .crb-figure-btn:focus-visible { outline: 2px solid var(--mi-accent, #9a1f17); outline-offset: 2px; }
#cavIhdMiPathologyTopicContent .crb-figure-img { display: block; width: 100%; height: auto; border-radius: 8px; }
#cavIhdMiPathologyTopicContent .crb-zoom-badge { position: absolute; right: 12px; bottom: 12px; background: rgba(15, 23, 42, .82); color: #fff; font-size: 11px; font-weight: 700; padding: 4px 9px; border-radius: 999px; pointer-events: none; }
#cavIhdMiPathologyTopicContent .crb-attrib { font-size: 11px; color: #6b7280; text-align: center; line-height: 1.4; }
#cavIhdMiPathologyTopicContent .crb-attrib a { color: #6b7280; }

#cavIhdMiPathologyTopicContent .crb-recog { align-content: start; }
#cavIhdMiPathologyTopicContent .crb-predict { display: grid; gap: 8px; justify-items: start; }
#cavIhdMiPathologyTopicContent .crb-predict-q { color: #111111; font-size: 14.5px; font-weight: 700; }
#cavIhdMiPathologyTopicContent .crb-reveal {
    appearance: none; cursor: pointer; font: inherit; font-size: 13.5px; font-weight: 800; color: #fff;
    background: var(--mi-accent, #9a1f17); border: none; border-radius: 999px; padding: 8px 16px;
}
#cavIhdMiPathologyTopicContent .crb-reveal:hover { filter: brightness(1.08); }
#cavIhdMiPathologyTopicContent .crb-answer { color: #111111; font-size: 14.5px; line-height: 1.5; padding: 10px 13px; border-radius: 10px; background: #e7f7ee; border: 1px solid #a7e0c0; }
#cavIhdMiPathologyTopicContent .crb-answer strong { color: #111111; }

#cavIhdMiPathologyTopicContent .crb-recog-h { font-size: 14px; font-weight: 850; color: #111111; margin-bottom: 5px; }
#cavIhdMiPathologyTopicContent .crb-recog-list { margin: 0; padding-left: 18px; display: grid; gap: 5px; }
#cavIhdMiPathologyTopicContent .crb-recog-list li { color: #111111; font-size: 14px; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-recog-list strong { color: #111111; }

/* ---- Phase 6 pearl + cross-links ---- */
#cavIhdMiPathologyTopicContent .crb-pearl { padding: 16px 18px; gap: 10px; }
#cavIhdMiPathologyTopicContent .crb-callout-head { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
#cavIhdMiPathologyTopicContent .crb-pearl .solid-text-card__badge { color: var(--mi-accent, #9a1f17); background: #fff; border-color: color-mix(in srgb, var(--mi-accent, #9a1f17) 28%, #fff); }
#cavIhdMiPathologyTopicContent .crb-pearl p { margin: 0; color: #111111; font-size: 14.5px; line-height: 1.55; }
#cavIhdMiPathologyTopicContent .crb-pearl p strong { color: #111111; }
#cavIhdMiPathologyTopicContent .crb-forward { margin: 0; color: #111111; font-size: 13px; line-height: 1.5; }
#cavIhdMiPathologyTopicContent .crb-xlinks { display: flex; flex-wrap: wrap; gap: 10px; }
#cavIhdMiPathologyTopicContent .crb-xlink {
    appearance: none; cursor: pointer; font: inherit; display: inline-flex; align-items: center; gap: 4px;
    color: var(--mi-accent, #9a1f17); background: #fff; border: 1.5px solid var(--mi-accent, #9a1f17);
    border-radius: 999px; padding: 6px 14px; font-size: 12.5px; font-weight: 800;
}
#cavIhdMiPathologyTopicContent .crb-xlink:hover { background: color-mix(in srgb, var(--mi-accent, #9a1f17) 12%, #ffffff); }

/* ---- lightbox (click the preview to enlarge with the recognition note) ---- */
#cavIhdMiPathologyTopicContent .crb-lightbox { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 4vh 4vw; }
#cavIhdMiPathologyTopicContent .crb-lightbox[hidden] { display: none; }
#cavIhdMiPathologyTopicContent .crb-lb-backdrop { position: absolute; inset: 0; background: rgba(15, 23, 42, .72); }
#cavIhdMiPathologyTopicContent .crb-lb-panel { position: relative; z-index: 1; width: 100%; max-width: 1000px; max-height: 92vh; overflow: auto; background: #fff; border-radius: 14px; padding: 14px; box-shadow: 0 30px 70px rgba(0, 0, 0, .4); }
#cavIhdMiPathologyTopicContent .crb-lb-x { position: absolute; top: 8px; right: 10px; appearance: none; width: 32px; height: 32px; border: none; border-radius: 999px; background: rgba(15, 23, 42, .06); color: #111; font-size: 20px; line-height: 1; cursor: pointer; }
#cavIhdMiPathologyTopicContent .crb-lb-x:hover { background: rgba(15, 23, 42, .12); }
#cavIhdMiPathologyTopicContent .crb-lb-img { display: block; width: 100%; height: auto; border-radius: 10px; }
#cavIhdMiPathologyTopicContent .crb-lb-desc { margin-top: 10px; color: #111111; font-size: 14px; line-height: 1.55; }
#cavIhdMiPathologyTopicContent .crb-lb-desc strong { color: #111111; }
#cavIhdMiPathologyTopicContent .crb-lb-cite { margin-top: 6px; color: #6b7280; font-size: 11.5px; }

@media (prefers-reduced-motion: reduce) {
    #cavIhdMiPathologyTopicContent .crb-tip { transition: none; }
    #cavIhdMiPathologyTopicContent .crb-mech-dd > summary::after { transition: none; }
}
@media (max-width: 900px) {
    #cavIhdMiPathologyTopicContent .crb-mech { grid-template-columns: 1fr 1fr; }
    #cavIhdMiPathologyTopicContent .crb-recog-row { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
    #cavIhdMiPathologyTopicContent .crb-two { grid-template-columns: 1fr; gap: 14px; }
    #cavIhdMiPathologyTopicContent .crb-col-injure { border-left: none; padding-left: 0; border-top: 1px solid rgba(15, 23, 42, .14); padding-top: 14px; }
    #cavIhdMiPathologyTopicContent .crb-tip { width: 200px; }
}