/* ── 19. Breadcrumbs that open to siblings ───────────── */
.s19 { height: 620px; background: var(--gray-0); color: var(--gray-850); }
.bc-top { position: absolute; left: 0; right: 0; top: 0; height: 64px; display: flex; align-items: center; gap: 26px; padding: 0 clamp(18px, 4cqw, 44px); border-bottom: 1px solid var(--gray-60); font-size: 13px; font-weight: 500; }
.bc-lg { font-size: 20px; font-weight: 550; letter-spacing: -0.022em; font-style: italic; }
.bc-top .bc-q { margin-left: auto; width: min(280px, 36cqw); height: 38px; border-radius: 9999px; background: var(--gray-40); display: flex; align-items: center; padding: 0 14px; color: var(--gray-450); font-weight: 400; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bc { position: absolute; left: clamp(18px, 4cqw, 44px); right: clamp(18px, 4cqw, 44px); top: 84px; z-index: 5; }
.bc-ol { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; flex-wrap: nowrap; }
.bc-li { display: flex; align-items: center; transition: opacity .3s ease, transform .45s cubic-bezier(.2,.9,.25,1); white-space: nowrap; }
.bc-li.in { opacity: 0; transform: translateX(-8px); }
.bc-li.out { opacity: 0; transform: translateX(6px); transition-duration: .14s; }
.bc-b { display: inline-flex; align-items: center; gap: 4px; border: 0; background: none; padding: 6px 8px; margin: 0 -2px; border-radius: 6px; font-size: 13px; color: var(--gray-500); cursor: default; transition: background .15s, color .15s; }
.bc-b:is(:hover, [data-hover]), .bc-b[aria-expanded="true"] { background: var(--gray-40); color: var(--gray-850); }
.bc-li:last-child .bc-b { color: var(--gray-850); font-weight: 550; }
.bc-b svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; opacity: .55; transition: transform .3s cubic-bezier(.2,.9,.25,1); }
.bc-b[aria-expanded="true"] svg { transform: rotate(180deg); }
.bc-sep { color: var(--gray-200); margin: 0 6px; font-size: 13px; }
.bc-li:last-child .bc-sep { display: none; }
.bc-dd { position: absolute; left: 0; top: 122px; z-index: 20; min-width: 190px; background: var(--gray-0); border-radius: 12px; box-shadow: 0 0 0 1px color-mix(in srgb, var(--gray-900) 6%, transparent), var(--e3); padding: 6px; opacity: 0; pointer-events: none; transform-origin: 20px 0; overflow: hidden; }
.bc-dd button { display: flex; align-items: center; justify-content: space-between; gap: 18px; width: 100%; border: 0; background: none; text-align: left; padding: 9px 10px; border-radius: 8px; font-size: 13px; color: var(--gray-850); cursor: default; white-space: nowrap; }
.bc-dd button:is(:hover, [data-hover]), .bc-dd button.kb { background: var(--gray-40); }
.bc-dd button span { color: var(--gray-350); font-size: 12px; font-variant-numeric: tabular-nums; }
.bc-dd button.cur { font-weight: 550; }
.bc-dd button.cur::after { content: ""; width: 12px; height: 7px; border-left: 2px solid var(--gray-850); border-bottom: 2px solid var(--gray-850); transform: rotate(-45deg) translateY(-2px); margin-left: 8px; }
.bc-page { position: absolute; left: clamp(18px, 4cqw, 44px); right: clamp(18px, 4cqw, 44px); top: 140px; }
.bc-t { margin: 0; font-size: clamp(32px, 5.6cqw, 56px); letter-spacing: -0.022em; font-weight: 550; transition: opacity .16s, transform .4s cubic-bezier(.2,.9,.25,1); }
.bc-t.out { opacity: 0; transform: translateY(6px); }
.bc-n { margin: 4px 0 0; font-size: 15px; color: var(--gray-450); }
.bc-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 26px; }
.bc-grid div { transition: opacity .3s ease calc(var(--d) * 50ms), transform .5s cubic-bezier(.2,.9,.25,1) calc(var(--d) * 50ms); }
.bc-grid.out div { opacity: 0; transform: translateY(10px); transition: opacity .12s, transform .12s; }
.bc-grid i { display: block; aspect-ratio: 1 / 1.1; border-radius: 8px; }
.bc-grid b { display: block; margin-top: 10px; font-size: 13px; font-weight: 550; }
.bc-grid span { font-size: 13px; color: var(--gray-450); }
@container (max-width: 700px) { .bc-grid { grid-template-columns: 1fr 1fr; } .bc-top span:not(.bc-lg):not(.bc-q) { display: none; } }