:root{--paper: #f4f3f0;--paper-2: #fbfaf8;--navy: #152238;--oxide: #9e2b1e;--ink: #16181b;--muted: #5c5f63;--line: #e3e1dc;--line-strong: #8a857b;--navy-line: #2a3a54;--oxide-light: #e58a67;--sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--fs-display: clamp(2.15rem, 1.4rem + 3.5vw, 4rem);--fs-h2: clamp(1.7rem, 1.2rem + 2.2vw, 2.6rem);--fs-h3: clamp(1.05rem, .95rem + .55vw, 1.3rem);--fs-lead: clamp(1.05rem, .98rem + .5vw, 1.3rem);--fs-body: 1.0625rem;--fs-small: .9375rem;--space-1: .5rem;--space-2: 1rem;--space-3: 1.5rem;--space-4: 2rem;--space-5: 3rem;--space-6: 5rem;--space-7: 8rem;--maxw: 1280px;--maxw-prose: 42rem;--radius: 14px;--radius-sm: 9px;--ease: cubic-bezier(.22, 1, .36, 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var(--ease)}.btn:active{transform:translateY(1px)}.btn-sm{padding:.5rem 1rem;min-height:44px}.btn-primary{background:var(--navy);color:var(--paper)}.btn-primary:hover{background:#1d2f4d}.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line-strong)}.btn-ghost:hover{border-color:var(--navy)}:focus-visible{outline:2px solid var(--oxide);outline-offset:2px}.solve :focus-visible,.control :focus-visible,.pteaser :focus-visible{outline-color:var(--oxide-light)}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}.nav[data-astro-cid-dmqpwcec]{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}.nav__inner[data-astro-cid-dmqpwcec]{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;height:64px}.nav__brand[data-astro-cid-dmqpwcec]{justify-self:start;display:inline-flex;align-items:center;gap:.55rem;font-weight:700;letter-spacing:-.02em;font-size:1.15rem;color:var(--navy);text-decoration:none}.nav__links[data-astro-cid-dmqpwcec]{justify-self:center;display:flex;align-items:center;gap:1.8rem}.nav__links[data-astro-cid-dmqpwcec] a[data-astro-cid-dmqpwcec]{color:var(--navy);text-decoration:none;font-size:var(--fs-small);font-weight:500}.nav__links[data-astro-cid-dmqpwcec] a[data-astro-cid-dmqpwcec]:hover{color:var(--oxide)}.nav__actions[data-astro-cid-dmqpwcec]{justify-self:end}@media(max-width:720px){.nav__inner[data-astro-cid-dmqpwcec]{grid-template-columns:1fr auto}.nav__links[data-astro-cid-dmqpwcec]{display:none}}.footer[data-astro-cid-sz7xmlte]{padding-bottom:var(--space-4);padding-top:var(--space-5)}.footer__card[data-astro-cid-sz7xmlte]{background:var(--navy);color:var(--paper);border:1px solid var(--navy-line);border-radius:22px;padding:clamp(1.75rem,1.2rem + 2.5vw,3rem);box-shadow:0 24px 60px #1522382e}.footer__top[data-astro-cid-sz7xmlte]{display:grid;grid-template-columns:1.3fr 2fr;gap:var(--space-5)}.footer__logo[data-astro-cid-sz7xmlte]{display:inline-flex;align-items:center;gap:.55rem;font-weight:700;font-size:1.2rem;letter-spacing:-.02em;color:var(--paper);text-decoration:none}.footer__tag[data-astro-cid-sz7xmlte]{color:#9fb0c9;font-size:var(--fs-small);line-height:1.6;margin-top:.85rem;max-width:24rem}.footer__social[data-astro-cid-sz7xmlte]{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;margin-top:1.1rem;border-radius:10px;border:1px solid var(--navy-line);color:#9fb0c9;transition:color .2s var(--ease),border-color .2s 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