:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--canvas:#f0f0f0;--recess:#f9f9f9;--surface:#fff;--raised:#e2e2e2;--ink:#000;--ink-soft:#0000009e;--ink-faint:#00000061;--ink-ghost:#0000001a;--radius-block:28px;--radius-surface:14px;--gap:4px}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--canvas:#111;--recess:#1a1a1a;--surface:#262626;--raised:#363636;--ink:#fff;--ink-soft:#ffffffa8;--ink-faint:#ffffff6b;--ink-ghost:#ffffff1f}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--canvas);color:var(--ink);letter-spacing:.01em;font-feature-settings:"palt" 1;-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Hiragino Kaku Gothic ProN,Yu Gothic Medium,Yu Gothic,Meiryo,system-ui,sans-serif;font-weight:500;line-height:1.8}::selection{background:var(--ink);color:var(--canvas)}:focus-visible{outline:3px solid var(--ink);outline-offset:3px}.num{font-variant-numeric:tabular-nums;letter-spacing:.015em;font-weight:800;font-stretch:125%}.page{max-width:1120px;padding:var(--gap);gap:var(--gap);flex-direction:column;margin:0 auto;display:flex}.block{background:var(--recess);border-radius:var(--radius-block);padding:clamp(28px,5.5vw,72px)}.brand{letter-spacing:-.02em;padding:26px clamp(28px,5.5vw,72px) 0;font-size:20px;font-weight:700}h1,h2{letter-spacing:-.035em;margin:0;font-weight:700;line-height:1.32}h1{letter-spacing:-.05em;font-size:clamp(34px,6.4vw,72px);font-weight:800;line-height:1.24}h2{font-size:clamp(26px,3.6vw,40px)}.lede{max-width:30em;color:var(--ink-soft);margin:22px 0 0;font-size:clamp(16px,1.55vw,19px)}.body{max-width:30em;color:var(--ink-soft);margin:18px 0 0;font-size:clamp(15px,1.25vw,17px)}.hero{padding-bottom:0;overflow:hidden}.shelf{justify-content:center;align-items:flex-end;gap:clamp(12px,2.4vw,30px);margin-top:clamp(40px,7vw,88px);display:flex}.shelf>*{transform-origin:50% 100%;flex:0 auto;width:clamp(96px,20vw,224px)}.shelf>:first-child{width:clamp(88px,18vw,200px)}.shelf>:nth-child(3){width:clamp(92px,19vw,210px)}@media (prefers-reduced-motion:no-preference){.shelf>*{animation:.7s cubic-bezier(.22,1,.36,1) backwards settle}.shelf>:first-child{animation-delay:60ms}.shelf>:nth-child(2){animation-delay:0s}.shelf>:nth-child(3){animation-delay:.12s}}@keyframes settle{0%{opacity:0;transform:translateY(18px)scaleY(.985)}}.book{aspect-ratio:3/4;background:var(--raised);filter:drop-shadow(0 3cqw 6cqw #00000059);border-radius:1.2cqw 3cqw 3cqw 1.2cqw;position:relative;overflow:hidden;container-type:inline-size}.book__emblem{width:100%;height:100%;color:var(--ink);opacity:.1;place-items:center;display:grid;position:absolute;top:0;left:4.25cqw;transform:translateY(18cqw)}.book__emblem svg{width:42cqw;height:42cqw}.book__sheen{background:linear-gradient(to bottom right,#ffffff1c 0%,#ffffff08 45%,#00000038 100%);position:absolute;inset:0}.book__groove{background:linear-gradient(90deg,#0000006b 0%,#0000000f 30%,#00000029 55%,#0000 100%);width:8.5cqw;position:absolute;inset:0 auto 0 0}.book__edge{background:#ffffff12;width:1px;position:absolute;inset:0 0 0 auto}.book__title{font-size:calc(10cqw * var(--fit,1));letter-spacing:-.01em;color:var(--ink);margin:0;font-weight:700;line-height:1.28;position:absolute;top:17cqw;left:8.5cqw;right:5cqw}.book__title span{white-space:nowrap;display:block}.pair{gap:var(--gap);grid-template-columns:1fr;margin-top:clamp(30px,4vw,48px);display:grid}@media (min-width:720px){.pair{grid-template-columns:1fr 1fr}}.objective{background:var(--surface);border-radius:var(--radius-surface);flex-wrap:wrap;grid-column:1/-1;align-items:baseline;gap:4px 14px;padding:18px 22px;display:flex}.objective__what{letter-spacing:-.02em;font-size:17px;font-weight:700}.objective__note{color:var(--ink-faint);font-size:13px}.item{background:var(--surface);border-radius:var(--radius-surface);padding:22px}.item__q{letter-spacing:-.015em;margin:0;font-size:16px;font-weight:700;line-height:1.6}.item__choices{flex-wrap:wrap;gap:6px;margin:16px 0 0;padding:0;list-style:none;display:flex}.item__choices li{color:var(--ink-soft);background:var(--raised);border-radius:999px;padding:6px 14px;font-size:13px}.item__choices li[data-correct]{background:var(--ink);color:var(--canvas);font-weight:700}.streak{gap:6px;margin-top:clamp(30px,4vw,44px);display:flex}.day{aspect-ratio:1;border-radius:var(--radius-surface);background:var(--surface);max-width:62px;color:var(--ink-faint);flex:1 1 0;place-items:center;font-size:clamp(13px,1.8vw,17px);display:grid}.day[data-answered]{background:var(--ink);color:var(--canvas)}.day[data-coming]{opacity:.4}.streak-caption{color:var(--ink-faint);margin:16px 0 0;font-size:13px}.catalogue{grid-template-columns:1fr;gap:clamp(24px,3.5vw,40px);margin-top:clamp(34px,5vw,56px);display:grid}@media (min-width:640px){.catalogue{grid-template-columns:repeat(3,1fr)}}.entry{align-items:flex-start;gap:20px;display:flex}@media (min-width:640px){.entry{flex-direction:column;gap:16px}}.entry .book{flex:none;width:108px}@media (min-width:640px){.entry .book{width:100%}}.entry__name{letter-spacing:-.025em;margin:0;font-size:16px;font-weight:700;line-height:1.5}.entry__sub{color:var(--ink-soft);margin:6px 0 0;font-size:13px}.tally{gap:18px;margin:14px 0 0;display:flex}.tally div{flex-direction:column;display:flex}.tally b{font-size:22px;line-height:1.1}.tally small{color:var(--ink-faint);letter-spacing:.02em;font-size:11px}.signup{gap:var(--gap);flex-wrap:wrap;max-width:520px;margin-top:30px;display:flex}.signup input{border-radius:var(--radius-surface);background:var(--surface);min-width:0;color:var(--ink);font:inherit;border:0;flex:240px;padding:16px 18px;font-size:15px}.signup input::placeholder{color:var(--ink-faint)}.signup button{border-radius:var(--radius-surface);background:var(--ink);color:var(--canvas);font:inherit;cursor:pointer;border:0;padding:16px 26px;font-size:15px;font-weight:700;transition:opacity .12s}.signup button:hover:not(:disabled){opacity:.82}.signup button:disabled{cursor:default;opacity:.45}.signup-note{color:var(--ink-faint);min-height:1.6em;margin:14px 0 0;font-size:13px}.foot{color:var(--ink-faint);flex-wrap:wrap;justify-content:space-between;gap:12px;padding:22px clamp(28px,5.5vw,72px) 34px;font-size:12px;display:flex}.foot a{color:var(--ink-soft);-webkit-text-decoration-color:var(--ink-ghost);text-decoration-color:var(--ink-ghost);text-underline-offset:3px}