:root{--navy:#102a43;--blue:#1f5d78;--red:#d72d2d;--cream:#f7f3e8;--lime:#dff36b;--ink:#13202b;--muted:#61717e;--line:#d8e0e5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#eef4f6 0 520px,#fff 520px);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,a{font:inherit}.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;min-height:68px;padding:10px max(20px,calc((100vw - 1040px)/2));border-bottom:1px solid rgba(16,42,67,.12);background:rgba(255,255,255,.9);backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:9px;color:var(--navy);font-weight:850;text-decoration:none}.brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--navy);color:#fff;font-size:13px}.reset,.quiet,.nav-buttons button{border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--navy);padding:9px 14px;font-weight:750;cursor:pointer}main{width:min(100% - 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1040px)/2));background:var(--navy);color:#dbe9ef;font-size:13px}footer a{color:var(--lime);font-weight:800;text-decoration:none}:focus-visible{outline:3px solid #f0c34b;outline-offset:3px}@media(max-width:680px){body{background:linear-gradient(180deg,#eef4f6 0 600px,#fff 600px)}.topbar{min-height:60px}.reset{padding:8px 10px;font-size:12px}.intro{padding-top:42px}.lede{font-size:16px}.stats{grid-template-columns:repeat(3,1fr)}.stats>div{padding:11px}.stats strong{font-size:22px}.progress-wrap{grid-column:1/-1}.study{width:calc(100% + 16px);margin-left:-8px;padding:12px;border-radius:20px}.study-head{padding:7px 5px}.study-head .eyebrow{display:none}.filters{margin:14px 0}.filters button{padding:8px 10px;font-size:13px}.card{height:430px}.face{padding:22px 15px}.sign-art{height:235px;margin:14px}.ratings{grid-template-columns:1fr}.nav-buttons button{padding:9px 12px}footer{flex-direction:column}.answer{font-size:30px}.explanation{font-size:15px}}