.spine-head[data-astro-cid-nyxaer5z]{display:grid;grid-template-columns:minmax(0,.82fr) minmax(360px,.76fr);gap:clamp(24px,4vw,56px);align-items:end;margin-bottom:32px}.spine-head[data-astro-cid-nyxaer5z] .t-lead[data-astro-cid-nyxaer5z]{max-width:58ch}.spine-layout[data-astro-cid-nyxaer5z]{display:grid;grid-template-columns:minmax(240px,.34fr) minmax(0,1fr);gap:16px}.spine-rail[data-astro-cid-nyxaer5z]{display:grid;gap:9px}.spine-rail[data-astro-cid-nyxaer5z] button[data-astro-cid-nyxaer5z]{appearance:none;display:grid;grid-template-columns:42px minmax(0,1fr);gap:4px 12px;align-items:center;width:100%;padding:13px 14px;border:1px solid var(--t-line-light);border-radius:13px;background:#fff;color:var(--t-ink-text);text-align:left;cursor:pointer;box-shadow:0 12px 28px #0811090d;transition:border-color .2s var(--t-ease),background .2s var(--t-ease),transform .2s var(--t-ease)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-rail[data-astro-cid-nyxaer5z] button[data-astro-cid-nyxaer5z]{border-color:var(--t-line);background:#ffffff09;color:var(--t-text)}.spine-rail[data-astro-cid-nyxaer5z] button[data-astro-cid-nyxaer5z]:hover,.spine-rail[data-astro-cid-nyxaer5z] button[data-astro-cid-nyxaer5z].is-active{border-color:#57d98c6b;background:#2ea35c1a;transform:translateY(-1px)}.spine-rail[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z]{grid-row:span 2;display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:#2ea35c1a;color:var(--t-accent-deep);font:700 12px/1 var(--t-mono)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-rail[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z]{color:var(--t-accent-bright)}.spine-rail[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z]{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:17px;line-height:1.1}.spine-rail[data-astro-cid-nyxaer5z] em[data-astro-cid-nyxaer5z]{min-width:0;color:var(--t-ink-muted);font:500 13px/1.25 var(--t-sans);font-style:normal}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-rail[data-astro-cid-nyxaer5z] em[data-astro-cid-nyxaer5z]{color:var(--t-muted)}.spine-panel-wrap[data-astro-cid-nyxaer5z]{min-width:0;border:1px solid var(--t-line-light);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 22px 60px #08110914}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-wrap[data-astro-cid-nyxaer5z]{border-color:var(--t-line);background:#07110cc2;box-shadow:0 28px 70px #0000003d}.spine-panel-wrap[data-astro-cid-nyxaer5z] article[data-astro-cid-nyxaer5z]{min-height:100%;padding:clamp(24px,3.2vw,44px)}.spine-panel-wrap[data-astro-cid-nyxaer5z] article[data-astro-cid-nyxaer5z][hidden]{display:none}.spine-panel-top[data-astro-cid-nyxaer5z]{display:flex;justify-content:space-between;gap:18px;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--t-line-light)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-top[data-astro-cid-nyxaer5z]{border-bottom-color:#c2ccc421}.spine-panel-top[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.spine-panel-top[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z],.spine-facts[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.handoff-strip[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z]{font-family:var(--t-mono);font-size:11px;letter-spacing:0;text-transform:uppercase}.spine-panel-top[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.spine-facts[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.handoff-strip[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z]{color:var(--t-accent-deep)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-top[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.t-bg-surface[data-astro-cid-nyxaer5z] .spine-facts[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z],.t-bg-surface[data-astro-cid-nyxaer5z] .handoff-strip[data-astro-cid-nyxaer5z] span[data-astro-cid-nyxaer5z]{color:var(--t-accent-bright)}.spine-panel-top[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z]{color:var(--t-ink-muted)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-top[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z]{color:var(--t-muted)}.spine-panel-wrap[data-astro-cid-nyxaer5z] h3[data-astro-cid-nyxaer5z]{max-width:12ch;margin-top:26px;color:var(--t-ink-text);font-size:clamp(34px,4.5vw,64px);line-height:.98}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-wrap[data-astro-cid-nyxaer5z] h3[data-astro-cid-nyxaer5z]{color:var(--t-text)}.spine-panel-wrap[data-astro-cid-nyxaer5z] p[data-astro-cid-nyxaer5z]{max-width:72ch;margin-top:18px;color:var(--t-ink-muted);font-size:clamp(18px,1.5vw,23px);line-height:1.55}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-panel-wrap[data-astro-cid-nyxaer5z] p[data-astro-cid-nyxaer5z]{color:var(--t-muted)}.spine-facts[data-astro-cid-nyxaer5z]{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:30px}.spine-facts[data-astro-cid-nyxaer5z] div[data-astro-cid-nyxaer5z]{min-width:0;padding:16px;border:1px solid var(--t-line-light);border-radius:14px;background:var(--t-paper)}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-facts[data-astro-cid-nyxaer5z] div[data-astro-cid-nyxaer5z]{border-color:#c2ccc424;background:#ffffff09}.spine-facts[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z]{display:block;margin-top:9px;color:var(--t-ink-text);font-size:clamp(16px,1.16vw,18px);line-height:1.48}.t-bg-surface[data-astro-cid-nyxaer5z] .spine-facts[data-astro-cid-nyxaer5z] strong[data-astro-cid-nyxaer5z]{color:var(--t-text)}.handoff-strip[data-astro-cid-nyxaer5z]{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin-top:18px}.handoff-strip[data-astro-cid-nyxaer5z] article[data-astro-cid-nyxaer5z]{min-width:0;padding:15px;border:1px solid var(--t-line-light);border-radius:13px;background:#ffffffd1}.t-bg-surface[data-astro-cid-nyxaer5z] .handoff-strip[data-astro-cid-nyxaer5z] article[data-astro-cid-nyxaer5z]{border-color:var(--t-line);background:#ffffff09}.handoff-strip[data-astro-cid-nyxaer5z] p[data-astro-cid-nyxaer5z]{margin-top:9px;color:var(--t-ink-muted);font-size:14.5px;line-height:1.48}.t-bg-surface[data-astro-cid-nyxaer5z] .handoff-strip[data-astro-cid-nyxaer5z] p[data-astro-cid-nyxaer5z]{color:var(--t-muted)}@media(max-width:1080px){.spine-head[data-astro-cid-nyxaer5z],.spine-layout[data-astro-cid-nyxaer5z]{grid-template-columns:1fr}.spine-rail[data-astro-cid-nyxaer5z]{grid-template-columns:repeat(4,minmax(170px,1fr));overflow-x:auto}.handoff-strip[data-astro-cid-nyxaer5z]{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.spine-rail[data-astro-cid-nyxaer5z],.spine-facts[data-astro-cid-nyxaer5z],.handoff-strip[data-astro-cid-nyxaer5z]{grid-template-columns:1fr}.spine-panel-top[data-astro-cid-nyxaer5z]{display:grid}.spine-panel-wrap[data-astro-cid-nyxaer5z] h3[data-astro-cid-nyxaer5z]{max-width:none}}.problem-layout[data-astro-cid-d2jh5fun]{display:grid;grid-template-columns:minmax(360px,.78fr) minmax(0,1fr);gap:clamp(28px,4vw,58px);align-items:start}.problem-visual[data-astro-cid-d2jh5fun]{position:sticky;top:108px;min-height:620px;overflow:hidden;border:1px solid var(--t-line);border-radius:18px;background:#06100b;box-shadow:0 34px 88px #0000005c}.t-bg-paper[data-astro-cid-d2jh5fun] .problem-visual[data-astro-cid-d2jh5fun]{border-color:var(--t-line-light);box-shadow:0 24px 68px #0811091f}.problem-visual[data-astro-cid-d2jh5fun] img[data-astro-cid-d2jh5fun]{width:100%;height:100%;min-height:620px;object-fit:cover;object-position:50% 50%;filter:grayscale(.12) saturate(.92) contrast(1.1) brightness(.68)}.problem-visual[data-astro-cid-d2jh5fun]:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#0811091f,#081109e0),linear-gradient(90deg,#081109b8,#08110929)}.problem-overlay[data-astro-cid-d2jh5fun]{position:absolute;left:22px;right:22px;bottom:22px;z-index:1;padding:20px;border:1px solid rgba(194,204,196,.18);border-radius:16px;background:#060d09b8;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.problem-overlay[data-astro-cid-d2jh5fun] span[data-astro-cid-d2jh5fun],.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun] span[data-astro-cid-d2jh5fun],.problem-item[data-astro-cid-d2jh5fun] em[data-astro-cid-d2jh5fun]{font-family:var(--t-mono);font-size:11px;letter-spacing:0;text-transform:uppercase;color:var(--t-accent-bright);font-style:normal}.problem-overlay[data-astro-cid-d2jh5fun] strong[data-astro-cid-d2jh5fun]{display:block;margin-top:8px;font:600 clamp(46px,5vw,72px)/.9 var(--t-display);color:var(--t-text)}.problem-overlay[data-astro-cid-d2jh5fun] p[data-astro-cid-d2jh5fun]{margin-top:12px;color:var(--t-muted);font-size:clamp(16px,1.18vw,18px);line-height:1.55}.problem-head[data-astro-cid-d2jh5fun]{margin-bottom:24px}.problem-head[data-astro-cid-d2jh5fun] .t-lead[data-astro-cid-d2jh5fun]{max-width:66ch;margin-top:14px}.problem-list[data-astro-cid-d2jh5fun]{display:grid;gap:12px}.problem-item[data-astro-cid-d2jh5fun]{border:1px solid var(--t-line);border-radius:15px;background:#ffffff09;overflow:hidden}.t-bg-paper[data-astro-cid-d2jh5fun] .problem-item[data-astro-cid-d2jh5fun]{border-color:var(--t-line-light);background:#fff}.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun]{display:grid;grid-template-columns:44px minmax(0,1fr);gap:14px;align-items:center;padding:18px 20px;cursor:pointer;list-style:none}.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun]::-webkit-details-marker{display:none}.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun] span[data-astro-cid-d2jh5fun]{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:#57d98c1a}.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun] strong[data-astro-cid-d2jh5fun]{color:var(--t-text);font:600 clamp(20px,1.6vw,26px)/1.14 var(--t-display)}.t-bg-paper[data-astro-cid-d2jh5fun] .problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun] strong[data-astro-cid-d2jh5fun]{color:var(--t-ink-text)}.problem-item[data-astro-cid-d2jh5fun]>div[data-astro-cid-d2jh5fun]{display:grid;gap:10px;padding:0 20px 20px 78px}.problem-item[data-astro-cid-d2jh5fun] p[data-astro-cid-d2jh5fun]{color:var(--t-muted);font-size:clamp(16.5px,1.16vw,18.5px);line-height:1.6}.t-bg-paper[data-astro-cid-d2jh5fun] .problem-item[data-astro-cid-d2jh5fun] p[data-astro-cid-d2jh5fun]{color:var(--t-ink-muted)}.problem-item[data-astro-cid-d2jh5fun] b[data-astro-cid-d2jh5fun]{color:var(--t-accent-bright)}.t-bg-paper[data-astro-cid-d2jh5fun] .problem-item[data-astro-cid-d2jh5fun] b[data-astro-cid-d2jh5fun],.t-bg-paper[data-astro-cid-d2jh5fun] .problem-item[data-astro-cid-d2jh5fun] em[data-astro-cid-d2jh5fun]{color:var(--t-accent-deep)}.problem-item[data-astro-cid-d2jh5fun] em[data-astro-cid-d2jh5fun]{display:block;margin-top:4px;line-height:1.45}@media(max-width:980px){.problem-layout[data-astro-cid-d2jh5fun]{grid-template-columns:1fr}.problem-visual[data-astro-cid-d2jh5fun]{position:relative;top:auto;min-height:440px}.problem-visual[data-astro-cid-d2jh5fun] img[data-astro-cid-d2jh5fun]{min-height:440px}}@media(max-width:620px){.problem-item[data-astro-cid-d2jh5fun] summary[data-astro-cid-d2jh5fun]{grid-template-columns:1fr;gap:10px}.problem-item[data-astro-cid-d2jh5fun]>div[data-astro-cid-d2jh5fun]{padding:0 20px 20px}}