:root{color-scheme:light;--paper:#f6f3eb;--ink:#202d29;--muted:#5e685f;--line:#d4d8ca;--accent:#244f42;--card:#e1e7d9;--focus:#a34410;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.55}a{color:inherit;text-underline-offset:.24em}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid var(--focus);outline-offset:5px}.wrap{max-width:1000px;margin:0 auto;padding:0 32px}.skip{position:absolute;top:-100px;left:16px;padding:12px;background:#fff;z-index:10}.skip:focus{top:12px}.header{min-height:110px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:700;letter-spacing:-.025em;text-decoration:none;display:flex;align-items:center;gap:10px}.brand-mark{font-size:32px;font-weight:400}.header nav,.footer div{display:flex;gap:24px}.header nav a{font-size:14px;text-decoration:none}.header nav a:hover{text-decoration:underline}.intro{margin:46px 0 36px;max-width:660px}.eyebrow{text-transform:uppercase;font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--muted);margin:0 0 19px}h1{font-size:clamp(38px,7vw,68px);letter-spacing:-.055em;line-height:1.06;margin:0 0 24px;font-weight:600}h2{font-size:25px;letter-spacing:-.035em;line-height:1.25;margin:34px 0 12px}.lead{font-size:18px;line-height:1.65;color:var(--muted);max-width:570px}.game-panel{border:1px solid var(--line);border-radius:24px;padding:28px;background:#fcfbf7}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px}.scores{display:flex;gap:36px;margin:0}.scores dt{font-size:12px;color:var(--muted)}.scores dd{margin:1px 0 0;font-size:30px;font-variant-numeric:tabular-nums;font-weight:600;line-height:1.2}.score-total{font-size:16px;font-weight:400;color:var(--muted)}.reset{min-height:44px;border:1px solid var(--line);background:transparent;color:var(--ink);padding:9px 15px;border-radius:9px;cursor:pointer;font-size:14px}.reset:hover{background:var(--card)}.reset span{margin-left:9px;font-size:20px}.hint{font-size:13px;color:var(--muted);margin:22px 0 19px;max-width:680px}.board{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.card{aspect-ratio:1.15;display:flex;align-items:center;justify-content:center;border:1px solid #ccd6c4;border-radius:14px;background:var(--card);color:var(--accent);cursor:pointer;position:relative;transition:background .15s,transform .15s}.card:hover:not([aria-disabled="true"]){background:#d2ddc8;transform:translateY(-2px)}.card .back{font-size:30px;opacity:.55}.card .front{display:none;width:62%;max-width:100px;height:auto}.card.is-open{background:#fff;border-color:#92aa95}.card.is-open .back,.card.is-matched .back{display:none}.card.is-open .front,.card.is-matched .front{display:block}.card.is-matched{background:#f0f3e9;border-color:#aac19f;cursor:default}.card.is-matched::after{content:"✓";position:absolute;right:10px;bottom:4px;font-size:15px;color:#356141}.card svg{width:100%;height:auto;display:block}.status{min-height:1.6em;margin:20px 0 0;font-size:14px;color:var(--accent);font-weight:600}.footnote{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:14px;margin:24px 0 70px}.footnote>span{font-size:25px}.footer{border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:96px;font-size:12px;color:var(--muted)}.footer p{font-weight:600}.prose{max-width:720px;margin:46px 0 80px}.prose h1{font-size:clamp(36px,6vw,58px)}.prose p,.prose li{max-width:650px}.prose ol,.prose ul{padding-left:24px}.prose li{padding-left:5px;margin:12px 0}.back-link{display:inline-block;margin-top:24px;background:var(--accent);color:white;text-decoration:none;padding:12px 20px;border-radius:9px;min-height:44px}.notice{border-left:3px solid var(--accent);padding:12px 20px;background:var(--card)}
@media(max-width:600px){.wrap{padding:0 20px}.header{min-height:86px;gap:14px}.brand{font-size:14px;gap:6px}.brand-mark{font-size:26px}.header nav{gap:15px}.header nav a{font-size:12px}.intro{margin-top:32px}.lead{font-size:16px}.game-panel{padding:18px;border-radius:18px}.board{gap:8px}.card{border-radius:10px;aspect-ratio:1}.card .back{font-size:24px}.card.is-matched::after{right:6px;bottom:2px;font-size:12px}.scores{gap:23px}.scores dd{font-size:25px}.reset{font-size:12px;padding:8px 11px}.hint{font-size:12px}.footer{align-items:flex-start;flex-direction:column;gap:4px;padding-top:18px;padding-bottom:20px}.footer div{gap:20px}.footnote{margin-bottom:45px}.prose{margin-top:30px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}

.tone-0{color:#a24d2a}.tone-1{color:#316552}.tone-2{color:#8a651b}.tone-3{color:#57577f}