.backdrop{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}.site-header,.home{position:relative;z-index:1}.card{background:var(--panel)}.site-title{font-size:clamp(2.2rem,6vw,3.6rem);line-height:1}.site-tagline{margin:.5rem 0 0;color:var(--ink-soft);font-size:1.05rem}.home{max-width:1180px;margin:0 auto;padding:0 clamp(1rem,4vw,3rem) 4rem}.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 2rem}.filter{font-family:var(--font-ui)}.filter[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.card{display:flex;flex-direction:column;background:var(--panel);border:1.5px solid var(--rule);border-radius:var(--radius);box-shadow:var(--card-shadow);text-decoration:none;color:inherit;overflow:hidden;transition:box-shadow .16s ease,transform .16s ease,border-color .16s ease}a.card:hover{transform:translate(-2px,-3px);box-shadow:var(--card-shadow-hover);border-color:var(--ink-soft)}a.card:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.card--locked{opacity:.72;cursor:default}.card__art{position:relative;aspect-ratio:16 / 9;background:var(--paper);border-bottom:1.5px solid var(--rule)}.card__art canvas{display:block;width:100%;height:100%}.card__body{padding:1rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.4rem;flex:1}.card__meta{display:flex;gap:.4rem;align-items:center}.chip{font-family:var(--font-ui);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;padding:.2em .6em;border-radius:999px;border:1px solid var(--rule);color:var(--ink-soft)}.chip--math{border-color:var(--c1);color:var(--c1)}.chip--physics{border-color:var(--c3);color:var(--c3)}.chip--space{border-color:var(--c4);color:var(--c4)}.chip--status{margin-left:auto;border-style:dashed}.card__title{font-size:1.5rem}.card__blurb{margin:0;color:var(--ink-soft);font-size:.94rem;line-height:1.45}.home-footer{margin-top:3rem;color:var(--ink-faint);font-size:.9rem;border-top:1px solid var(--rule);padding-top:1.25rem}