:root{--bg: #eef1f7;--panel: #ffffff;--ink: #17203a;--faint: #6b7690;--line: #d4dae6;--grid: rgba(23, 32, 58, .045);--grid-strong: rgba(23, 32, 58, .07);--mono: ui-monospace, "SFMono-Regular", Menlo, "Cascadia Mono", Consolas, monospace;--sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--maxw: 940px;--r: 4px}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:var(--sans);line-height:1.5;-webkit-font-smoothing:antialiased;background-color:var(--bg);background-image:linear-gradient(var(--grid-strong) 1px,transparent 1px),linear-gradient(90deg,var(--grid-strong) 1px,transparent 1px),linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:130px 130px,130px 130px,26px 26px,26px 26px;background-position:-1px -1px}h1,h2,h3{font-family:var(--mono);font-weight:700;letter-spacing:-.01em}a{color:inherit}button{font-family:inherit}:focus-visible{outline:2.5px solid var(--ink);outline-offset:2px;border-radius:2px}:focus:not(:focus-visible){outline:none}input[type=range],input[type=checkbox]{accent-color:#7b2fbe}.page{min-height:100vh;padding:26px 20px 72px}.wrap{max-width:var(--maxw);margin:0 auto}.wrap-wide{max-width:1180px;margin:0 auto}.ex-grid{display:grid;grid-template-columns:minmax(0,1fr) 244px;gap:30px;align-items:start}.ex-rail{position:sticky;top:66px;display:flex;flex-direction:column;gap:14px}@media(max-width:940px){.ex-grid{grid-template-columns:1fr}.ex-rail{position:static}}.eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin:0 0 6px}.prose{font-size:14.5px;line-height:1.65;color:var(--ink);max-width:68ch}.prose-muted{color:var(--faint)}.flashcard{border:1px solid var(--line);border-radius:4px;background:var(--panel);padding:11px 14px}.flashcard>summary{cursor:pointer;list-style:none;display:flex;align-items:baseline;gap:2px;font-size:13.5px;font-weight:600;color:var(--ink)}.flashcard>summary::-webkit-details-marker{display:none}.flashcard>summary:after{content:"+";margin-left:auto;padding-left:12px;font-family:var(--mono);font-weight:400;color:var(--faint)}.flashcard[open]>summary:after{content:"−"}.flashcard[open]{border-color:var(--faint)}.atlas-card{transition:transform .12s ease,box-shadow .12s ease}.atlas-card:hover{transform:translateY(-2px);box-shadow:3px 3px #17203a17}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}}@media(max-width:560px){.page{padding:20px 14px 56px}}