.mit-root{--ink:#17170f;--ink-soft:#58564a;--stone-edge:#c7bfa4;--paper:#f2efe2;--paper-2:#eae5d2;--paper-3:#f7f4e9;--line:#ddd6bd;--accent:#23268C;--bad:#8C2F39;--cause:#23268C;--effect:#8C2F39;--both:rgba(233,182,90,.15);--spine-w:104px;--dot-x:80px;background:var(--paper);color:var(--ink);font-family:var(--font-inter),system-ui,sans-serif;min-height:100%;padding:34px clamp(16px,4vw,40px) 48px;max-width:1280px;margin:0 auto}.mit-root,.mit-root *,.mit-root :after,.mit-root :before{box-sizing:border-box}.mit-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:26px 0 16px}.mit-modebar{display:flex;gap:2px;padding:3px;border:1px solid var(--stone-edge);border-radius:8px;background:var(--paper-2);flex:0 0 auto}.mit-mode-btn{font-family:var(--font-inter),sans-serif;font-size:12.5px;font-weight:600;padding:6px 14px;border:none;border-radius:6px;background:transparent;color:var(--ink-soft);cursor:pointer}.mit-mode-btn.on{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}.mit-tier-toggle{flex:0 0 auto;font-family:var(--font-space-mono),monospace;font-size:10.5px;letter-spacing:.04em;padding:6px 12px;border:1px solid var(--stone-edge);border-radius:6px;background:var(--paper-2);color:var(--ink);cursor:pointer;white-space:nowrap}.mit-tier-toggle:hover:not(:disabled){background:#dcd6c6}.mit-tier-toggle:disabled{opacity:.45;cursor:default}.mit-eranav{display:flex;flex-wrap:wrap;gap:6px;margin-left:auto}.mit-eranav-btn{font-family:var(--font-space-mono),monospace;font-size:10.5px;letter-spacing:.04em;padding:6px 11px;border:1px solid var(--line);border-radius:999px;background:var(--paper-3);color:var(--ink-soft);cursor:pointer}.mit-eranav-btn:hover{border-color:var(--stone-edge);color:var(--ink);background:#fff}.mit-body{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;align-items:start}.mit-ladder{background:var(--paper-3);border:1px solid var(--line);border-radius:14px;padding:18px 22px 26px}.mit-ladder-head,.mit-rung{display:grid;grid-template-columns:minmax(0,1fr) var(--spine-w) minmax(0,1fr)}.mit-ladder-head{padding-bottom:4px;font-family:var(--font-space-mono),monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase}.mit-head-l{text-align:right;padding-right:12px;color:#8C4A3B}.mit-head-r{padding-left:12px;color:var(--accent)}.mit-era{transition:opacity .2s}.mit-era.is-dimmed{opacity:.38}.mit-era{scroll-margin-top:96px}.mit-era-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:center;gap:4px 10px;padding:22px 0 10px;margin-bottom:6px;border-bottom:1px dashed var(--stone-edge);text-align:center}.mit-era-name{margin:0;font-family:var(--font-fraunces),serif;font-weight:600;font-size:21px}.mit-era-range{font-family:var(--font-space-mono),monospace;font-size:11px;color:var(--ink-soft)}.mit-era-count{font-size:12.5px;color:var(--ink-soft)}.mit-era.is-revising .mit-era-head{border-bottom-color:var(--accent)}.mit-rungs{list-style:none;margin:0;padding:0}.mit-rung{position:relative;align-items:center;min-height:46px;padding:5px 0;border-radius:8px;transition:background .15s}.mit-rung.is-both{background:var(--both)}.mit-rung-side{display:flex;flex-wrap:wrap;gap:6px;min-width:0}.mit-rung-l{justify-content:flex-end;padding-right:12px}.mit-rung-r{justify-content:flex-start;padding-left:12px}.mit-rung-spine{position:relative;align-self:stretch;display:flex;flex-direction:column;justify-content:center}.mit-rung-spine:before{content:"";position:absolute;top:-5px;bottom:-5px;left:var(--dot-x);width:2px;margin-left:-1px;background:var(--stone-edge)}.mit-rung-wrap:first-child>.mit-rung:first-child .mit-rung-spine:before{top:50%}.mit-rung-wrap:last-child>.mit-rung:last-child .mit-rung-spine:before{bottom:50%}.mit-rung-year{width:calc(var(--dot-x) - 14px);text-align:right;font-family:var(--font-space-mono),monospace;font-size:12.5px;font-weight:700;color:var(--ink)}button.mit-rung-year{appearance:none;border:0;background:transparent;padding:0;cursor:pointer}.mit-rung-tag{width:calc(var(--dot-x) - 14px);text-align:right;font-family:var(--font-space-mono),monospace;font-size:8.5px;letter-spacing:.08em;text-transform:uppercase;color:#9a6a1c}.mit-rung-dot{position:absolute;top:50%;left:var(--dot-x);width:11px;height:11px;border-radius:50%;transform:translate(-50%,-50%);background:#8f8670;box-shadow:0 0 0 3px var(--paper-3)}.mit-rung.is-both .mit-rung-dot{background:#b9862f}.mit-rung.is-anchor .mit-rung-dot{width:15px;height:15px;background:var(--ink)}.mit-fold{min-height:30px}.mit-fold .mit-rung-dot{width:5px;height:5px;background:var(--stone-edge);box-shadow:none}.mit-fold-text{padding-left:12px;font-size:12px;font-style:italic;color:var(--ink-soft);opacity:.8}.mit-chip{max-width:100%;padding:6px 12px;border-radius:7px;cursor:pointer;text-align:left;font-family:var(--font-inter),sans-serif;font-size:13.5px;line-height:1.3;color:color-mix(in srgb,var(--chip) 72%,#000);background:color-mix(in srgb,var(--chip) 11%,#fff);border:1px solid color-mix(in srgb,var(--chip) 22%,transparent);transition:box-shadow .15s,transform .15s}.mit-chip:hover{box-shadow:0 2px 8px rgba(0,0,0,.12)}.mit-chip.is-anchor{background:var(--ink);color:var(--paper);border-color:var(--ink);font-family:var(--font-fraunces),serif;font-size:16px;font-weight:500;padding:7px 14px}.mit-chip.is-active{outline:2px solid var(--ink);outline-offset:2px}.mit-chip.is-cause{outline:2px dashed var(--cause);outline-offset:2px}.mit-chip.is-effect{outline:2px dashed var(--effect);outline-offset:2px}.mit-chip.is-placed{cursor:default;animation:mit-pop .25s ease-out}@keyframes mit-pop{0%{transform:scale(.7);opacity:0}to{transform:scale(1);opacity:1}}.mit-rung.is-target{cursor:pointer}.mit-rung.is-target:hover{background:rgba(35,38,140,.08)}.mit-rung.is-target .mit-rung-year{color:var(--accent);text-decoration:underline dotted;text-underline-offset:3px}.mit-rung.is-wrong{background:rgba(140,47,57,.16)}.mit-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:12px;max-height:calc(100vh - 112px);overflow-y:auto;scrollbar-width:thin}.mit-card{position:relative;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:#fff}.mit-eyebrow{font-family:var(--font-space-mono),monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}.mit-card-title{margin:6px 0 0;font-family:var(--font-fraunces),serif;font-weight:600;font-size:23px;line-height:1.2}.mit-detail{padding-right:40px}.mit-detail-close{position:absolute;top:10px;right:10px;width:28px;height:28px;border:none;background:transparent;font-size:20px;line-height:1;color:var(--ink-soft);cursor:pointer}.mit-detail-close:hover{color:var(--ink)}.mit-detail-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.mit-tag{font-family:var(--font-space-mono),monospace;font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;padding:2px 7px;border-radius:4px;color:color-mix(in srgb,var(--chip) 72%,#000);background:color-mix(in srgb,var(--chip) 13%,#fff)}.mit-tag-anchor{background:var(--ink);color:var(--paper)}.mit-detail-text{margin:10px 0 0;font-size:14px;line-height:1.55;color:var(--ink)}.mit-detail .mit-detail-text{margin-right:-20px}.mit-detail-group{display:flex;flex-direction:column;gap:6px;margin:14px -20px 0 0;padding-top:12px;border-top:1px solid var(--line)}.mit-detail-label{font-size:11.5px;color:var(--ink-soft)}.mit-label-cause{color:var(--cause)}.mit-label-effect{color:var(--effect)}.mit-detail-nolinks{margin:14px 0 0;font-size:12.5px;font-style:italic;color:var(--ink-soft)}.mit-mini{display:flex;flex-direction:column;gap:1px;width:100%;padding:8px 12px;border:1px solid transparent;border-radius:8px;text-align:left;cursor:pointer;background:color-mix(in srgb,var(--chip) 10%,#fff);color:color-mix(in srgb,var(--chip) 72%,#000);font-family:var(--font-inter),sans-serif}.mit-mini:hover{border-color:color-mix(in srgb,var(--chip) 30%,transparent)}.mit-mini.is-cause{border:1px dashed var(--cause)}.mit-mini.is-effect{border:1px dashed var(--effect)}.mit-mini-title{font-size:13.5px;font-weight:600;line-height:1.3}.mit-mini-meta{font-size:12px;opacity:.85}.mit-rule{padding:16px 20px;border-radius:14px;background:#f8ead7}.mit-rule .mit-eyebrow{color:#7a5a2a}.mit-rule p{margin:8px 0 0;font-size:13.5px;line-height:1.55}.mit-legend{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:6px 12px;font-size:12px;color:var(--ink-soft)}.mit-legend li{display:flex;align-items:center;gap:5px}.mit-legend-dot{width:9px;height:9px;border-radius:3px}.mit-btn{font-family:var(--font-inter),sans-serif;font-size:13.5px;font-weight:600;padding:10px 16px;border-radius:10px;border:1px solid var(--stone-edge);background:var(--paper-2);color:var(--ink);cursor:pointer}.mit-btn:hover{background:#dcd6c6}.mit-btn-dark{background:var(--ink);color:var(--paper);border-color:var(--ink)}.mit-btn-dark:hover{background:#2f2f25}.mit-btn-ghost{background:transparent;margin-top:14px;width:100%}.mit-revise-cta{width:100%;padding:13px 16px}.mit-revise-status{margin:6px 0 0;font-family:var(--font-space-mono),monospace;font-size:11px;letter-spacing:.03em;color:var(--ink-soft)}.mit-revise .mit-hint{margin:12px 0 10px}.mit-tray{display:flex;flex-wrap:wrap;gap:7px;max-height:calc(100vh - 380px);min-height:80px;overflow-y:auto;padding:2px}.mit-tray-card{font-family:var(--font-inter),sans-serif;font-size:12.5px;padding:7px 11px;border:1.5px solid var(--accent);border-radius:7px;background:var(--paper-3);color:var(--ink);cursor:pointer;text-align:left;animation:mit-tray-drop .32s ease-out backwards}.mit-tray-card:hover{background:#fff}.mit-tray-card.is-selected{background:var(--accent);color:#fff;box-shadow:0 2px 6px rgba(0,0,0,.2)}@keyframes mit-tray-drop{0%{transform:translateY(-16px);opacity:0}to{transform:translateY(0);opacity:1}}.mit-revise-done p{margin:14px 0 0;font-size:14px}.mit-revise-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.mit-hint{margin:0;font-size:12.5px;font-style:italic}.mit-foot,.mit-hint{color:var(--ink-soft)}.mit-foot{margin-top:22px;padding-top:14px;border-top:1px solid var(--line);font-family:var(--font-space-mono),monospace;font-size:10.5px;letter-spacing:.04em}@media (max-width:900px){.mit-body{grid-template-columns:minmax(0,1fr)}.mit-eranav{margin-left:0}.mit-aside{display:none}.mit-aside.is-open{display:flex;position:fixed;z-index:60;left:0;right:0;bottom:0;top:auto;max-height:58vh;padding:10px 12px calc(12px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--stone-edge);border-radius:16px 16px 0 0;box-shadow:0 -8px 30px rgba(23,23,15,.16)}.mit-aside.is-open .mit-revise-cta,.mit-aside.is-open .mit-rule{display:none}.mit-aside .mit-card{border:0;padding:8px 8px 4px;background:transparent}.mit-detail{padding-right:36px}.mit-tray{max-height:30vh}.mit-root.has-sheet{padding-bottom:60vh}}@media (max-width:640px){.mit-root{--spine-w:62px;--dot-x:48px}.mit-ladder{padding:10px 8px 18px;border-radius:10px}.mit-ladder-head{font-size:9px;letter-spacing:.05em}.mit-head-l{padding-right:6px}.mit-head-r{padding-left:6px}.mit-era-name{font-size:17px}.mit-rung{min-height:38px}.mit-rung-l{padding-right:6px}.mit-rung-r{padding-left:6px}.mit-rung-side{gap:4px}.mit-rung-year{font-size:10.5px}.mit-rung-tag,.mit-rung-year{width:calc(var(--dot-x) - 10px)}.mit-rung-tag{font-size:7.5px}.mit-chip{font-size:11.5px;padding:4px 8px;border-radius:5px}.mit-chip.is-anchor{font-size:13px;padding:5px 9px}.mit-fold-text{font-size:10.5px;padding-left:6px}.mit-card-title{font-size:20px}}[data-theme=dark] .mit-root{--ink:var(--d-ink);--ink-soft:var(--d-ink-soft);--stone-edge:var(--d-stone-edge);--paper:var(--d-paper);--paper-2:var(--d-paper-2);--paper-3:var(--d-paper-3);--line:var(--d-line);--accent:#a3a6ff;--bad:#ef9a9c;--cause:#a3a6ff;--effect:#ef9a9c;--both:rgba(233,182,90,.11)}[data-theme=dark] .mit-mode-btn.on{background:var(--d-hover);box-shadow:0 1px 3px rgba(0,0,0,.5)}[data-theme=dark] .mit-btn:hover,[data-theme=dark] .mit-eranav-btn:hover,[data-theme=dark] .mit-tier-toggle:hover:not(:disabled),[data-theme=dark] .mit-tray-card:hover{background:var(--d-hover)}[data-theme=dark] .mit-head-l{color:#e3a595}[data-theme=dark] .mit-rung-tag{color:#dcb067}[data-theme=dark] .mit-rung-dot{background:#7f7867}[data-theme=dark] .mit-chip{color:color-mix(in srgb,var(--chip) 45%,#fff);background:color-mix(in srgb,var(--chip) 22%,var(--d-surface));border-color:color-mix(in srgb,var(--chip) 40%,transparent)}[data-theme=dark] .mit-chip.is-anchor{color:var(--paper);background:var(--ink);border-color:var(--ink)}[data-theme=dark] .mit-chip:hover{box-shadow:0 2px 8px rgba(0,0,0,.5)}[data-theme=dark] .mit-rung.is-target:hover{background:rgba(163,166,255,.1)}[data-theme=dark] .mit-rung.is-wrong{background:rgba(239,154,156,.16)}[data-theme=dark] .mit-card{background:var(--d-surface)}[data-theme=dark] .mit-tag{color:color-mix(in srgb,var(--chip) 45%,#fff);background:color-mix(in srgb,var(--chip) 24%,var(--d-surface))}[data-theme=dark] .mit-tag-anchor{background:var(--ink);color:var(--paper)}[data-theme=dark] .mit-mini{background:color-mix(in srgb,var(--chip) 18%,var(--d-surface));color:color-mix(in srgb,var(--chip) 45%,#fff)}[data-theme=dark] .mit-rule{background:#2b2417}[data-theme=dark] .mit-rule .mit-eyebrow{color:#dcb67b}[data-theme=dark] .mit-btn-dark:hover{background:#d6d2c4}[data-theme=dark] .mit-tray-card.is-selected{color:#15140f;box-shadow:0 2px 6px rgba(0,0,0,.5)}@media (max-width:900px){[data-theme=dark] .mit-aside.is-open{box-shadow:0 -8px 30px rgba(0,0,0,.55)}}