/* page frame shared by index.html and session.html; page <style> blocks load after this file and override it */
:root{--text:#18181b;--muted:#71717a;--hair:#e6e6e9;--bubble:#f2f2f3;--side:#fafafa;--link:#2f6fed;--sw:236px}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font:15.5px/1.6 Inter,-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Helvetica,Arial,sans-serif;color:var(--text);background:#fff;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
#app{display:flex;min-height:100vh}
#side{width:var(--sw);flex-shrink:0;position:sticky;top:0;height:100vh;background:var(--side);border-right:1px solid var(--hair);display:flex;flex-direction:column;padding:18px 10px 14px}
#side .t{font-size:13.5px;font-weight:600;padding:0 8px;letter-spacing:-.01em}
#side .d{font-size:12px;color:var(--muted);padding:2px 8px 12px}
#side .top-link{display:flex;align-items:center;gap:9px;padding:7px 8px;margin:0 0 4px;border-radius:7px;font-size:13.5px;font-weight:500;color:var(--text);text-decoration:none}
#side .top-link:last-of-type{margin-bottom:8px}
#side .top-link.on{background:#ededef}
#side .top-link svg{width:16px;height:16px;stroke:var(--muted);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
@media(hover:hover){#side .top-link:hover{background:#f0f0f2;text-decoration:none}}
#side nav{flex:1;overflow:auto}
#side nav a{display:block;padding:6px 8px;border-radius:7px;font-size:13px;line-height:1.35;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#side nav a span{color:var(--muted);display:inline-block;width:20px}
#side nav a.on{background:#ededef}
#side nav a:hover{text-decoration:none}
@media(hover:hover) and (pointer:fine){#side nav a:hover{background:#f0f0f2}}
main{flex:1;min-width:0;padding:34px 40px 120px;display:flex;flex-direction:column;align-items:center}
main>*{width:100%;max-width:720px}
.bubble{background:var(--bubble);padding:11px 16px;border-radius:18px;max-width:78%;white-space:pre-wrap;overflow-wrap:anywhere}
.ts{font-size:12.5px;color:var(--muted);margin:6px 4px 0}
/* shared components: logos, reflection, hover dates, diagrams */
.who{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted)}
.who img{width:16px;height:16px;border-radius:4px;object-fit:contain}
.hov{opacity:0;transition:opacity 120ms ease-out}
h2:hover+.hov,.ph:hover>.w.hov,.ch:hover>.w.hov,.u:hover .hov,.turn:hover .u .hov{opacity:1}
@media(hover:none){.hov{opacity:1}}
.dia{margin:14px 0 6px}
.dia img{width:100%;display:block;border-radius:10px;border:1px solid var(--hair);background:#fff}
.dia figcaption{font-size:13.5px;color:var(--muted);margin-top:8px}
.dia figcaption b{font-weight:500;color:var(--text)}
/* bb-style worked block */
.wb{margin:18px 0 0}
.wb>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;color:var(--muted);font-size:14.5px;user-select:none}
.wb>summary::-webkit-details-marker{display:none}
.wb>summary .c{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform 120ms ease-out;flex-shrink:0;position:relative;top:1px}
.wb[open]>summary .c{transform:rotate(180deg)}
.wb>summary .who{margin-left:auto}
.wb .in{margin:8px 0 0 6px;padding-left:16px;border-left:1px solid var(--hair)}
.wb .nr{font-size:14.5px;color:var(--text);margin:8px 0;white-space:pre-wrap}
.wb .tr{display:flex;align-items:flex-start;gap:8px;color:var(--muted);font-size:14px;padding:4px 0}
.wb .tr svg{width:15px;height:15px;flex-shrink:0;margin-top:3px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.wb .tr b{font-weight:500;color:var(--muted);margin-right:4px}
.wb details.tg>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:6px;color:var(--muted);font-size:14px;padding:4px 0}
.wb details.tg>summary::-webkit-details-marker{display:none}
.wb details.tg>summary .c{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform 120ms ease-out;flex-shrink:0}
.wb details.tg[open]>summary .c{transform:rotate(90deg)}
.wb details.tg .tr{padding-left:10px}
.wb .fin{margin:10px 0 4px;padding-top:8px;border-top:1px dashed var(--hair);color:var(--muted);font-size:13.5px}.wb .fin>b{display:block;margin-bottom:6px}
.wb .fin p{margin:0 0 6px}.wb .fin ul{margin:0 0 6px 18px}
/* right message rail */
#rail{position:fixed;right:14px;top:10vh;height:80vh;display:flex;flex-direction:column;justify-content:space-between;gap:0;z-index:20}
#rail a{display:block;width:14px;height:1.5px;background:#d4d4d8;border-radius:1px;position:relative;box-sizing:content-box;padding:1px 0;background-clip:content-box}
#rail a.on{width:22px;height:2.5px;background:var(--text);background-clip:content-box}
#rail a:hover{background:var(--text)}
#rail .pv{display:none;position:absolute;right:26px;top:50%;transform:translateY(-50%);width:320px;background:#fff;border:1px solid var(--hair);border-radius:12px;padding:10px 14px;box-shadow:0 6px 24px rgba(0,0,0,.08);font-size:13.5px;line-height:1.45;text-align:left;white-space:normal}
#rail a:hover .pv{display:block}
#rail .pv b{display:block;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#rail .pv span{display:block;color:var(--muted);margin-top:2px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}
#rail:not(.dense){top:50%;transform:translateY(-50%);height:auto;gap:7px;justify-content:flex-start}#rail:not(.dense) a{height:2px;padding:2px 0}
@media(max-width:1100px){#rail{display:none}}
/* inspector stats: tinted panel, white cards */
.insp{--mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;margin:16px 0 4px;border:1px solid var(--hair);border-radius:12px;background:var(--side,#fafafa);padding:8px;font-size:13px;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.insp .ic{background:#fff;border:1px solid var(--hair);border-radius:9px;padding:9px 12px 10px;min-width:0}
.insp .ic:last-child:nth-child(odd){grid-column:1/-1}
.insp h4{font-size:11.5px;font-weight:500;color:var(--muted);margin-bottom:4px;display:flex;justify-content:space-between;align-items:center}
.insp h4 em{font-style:normal;font-family:var(--mono);font-size:11px}
.insp .kv .r{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:4px 0;border-top:1px solid var(--hair);font-size:12.5px}
.insp .kv .r:first-child{border-top:0}
.insp .kv span{color:var(--muted);display:flex;align-items:center;gap:7px;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.insp .kv span i{width:8px;height:8px;border-radius:2px;flex-shrink:0}
.insp .kv span.t{color:var(--text)}
.insp .kv em{font-style:normal;font-family:var(--mono);font-size:12px;text-align:right;color:var(--text);font-variant-numeric:tabular-nums;white-space:nowrap}
.insp .kv em small{font-size:11px;color:var(--muted);margin-left:6px}
.insp .meter{display:flex;height:6px;border-radius:3px;overflow:hidden;gap:1px;background:#f4f4f5;margin:6px 0 8px}
.insp .meter i{display:block;height:100%;min-width:1.5px}
.insp .lbls{display:flex;flex-wrap:wrap;gap:5px;margin-top:4px}
.insp .lbl{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;height:24px;padding:0 8px 0 5px;border-radius:6px;background:#f4f4f5;color:var(--text)}
.insp a.lbl{text-decoration:none;transition:background 120ms ease-out}
.insp a.lbl:hover{background:#e4e4e7}
.insp .lbl img{width:14px;height:14px;border-radius:3px;object-fit:contain}
.insp .lbl em{font-style:normal;font-family:var(--mono);font-size:11.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.insp .lbl .sk{display:grid;place-items:center;width:14px;height:14px;border-radius:3px;background:#e4dcf7;color:#6c45b8;font-size:9px;line-height:1}
.insp details>summary{list-style:none;cursor:pointer;user-select:none;display:flex;align-items:center;gap:5px;color:var(--muted);font-size:12px;padding:5px 0 0;border-top:1px solid var(--hair);margin-top:2px}
.insp details>summary::-webkit-details-marker{display:none}
.insp details .kv{margin-top:2px}
.insp details .kv .r:first-child{border-top:1px solid var(--hair)}
.insp .chev{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform 120ms ease-out;flex-shrink:0}
.insp details[open] .chev{transform:rotate(90deg)}
@media(max-width:600px){.insp{grid-template-columns:1fr}.insp .ic:last-child:nth-child(odd){grid-column:auto}}