:root{--bg:#f2f3fa;--surface:#fff;--surface-2:#f7f8fd;--ink:#1b1a2e;--muted:#6d6d8a;--line:#e4e5f0;--brand:#6c4cf1;--brand-2:#9b7bff;--accent:#ffc23c;--good:#16b981;--bad:#f2545b;--stage:#131a2b;--stage-2:#1b2438;--stage-line:#ffffff1f;--stage-ink:#e9eefb;--stage-muted:#93a2c4;--radius:14px;--radius-lg:22px;--shadow-sm:0 1px 2px #1b1a2e0f, 0 2px 8px #1b1a2e0d;--shadow:0 8px 28px #1b1a2e1f;--max:1340px;--header-h:64px;--rail-w:208px}*{box-sizing:border-box}html,body,#root{min-height:100%}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;margin:0;font-family:system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.6}h1,h2,h3{letter-spacing:-.015em;margin:0 0 .5em;line-height:1.25}p{margin:0 0 1em}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}.btn{border:1px solid 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var(--stage-line);grid-template-columns:repeat(9,1fr);gap:3px;width:100%;max-width:400px;padding:6px;display:grid}.mine-cell{cursor:pointer;touch-action:manipulation;-webkit-user-select:none;user-select:none;color:var(--stage-ink);border:0;border-radius:5px;place-items:center;padding:0;font-size:clamp(.8rem,3.4vw,1.05rem);font-weight:800;display:grid}.mine-cell.closed{background:linear-gradient(160deg,#2c3a5a,#202b45);border-top:1px solid #ffffff24}.mine-cell.closed:hover{background:linear-gradient(160deg,#35476c,#263351)}.mine-cell.open{cursor:default;background:#ffffff0f}.mine-cell.boom{background:var(--bad)}.mine-cell.n1{color:#7aa2ff}.mine-cell.n2{color:#5ee7a0}.mine-cell.n3{color:#ff8a80}.mine-cell.n4{color:#c4a5ff}.mine-cell.n5{color:#ffd66b}.mine-cell.n6{color:#6ee7ff}.mine-cell.n7,.mine-cell.n8{color:#fff}.memo-grid{grid-template-columns:repeat(4,1fr);gap:8px;width:100%;max-width:400px;display:grid}.memo-card{aspect-ratio:3/4;perspective:700px;cursor:pointer;background:0 0;border:0;padding:0}.memo-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .35s;display:block;position:relative}.memo-card.up .memo-inner{transform:rotateY(180deg)}.memo-back,.memo-front{backface-visibility:hidden;border:1px solid var(--stage-line);border-radius:12px;place-items:center;display:grid;position:absolute;inset:0}.memo-back{color:#b9c4e6;background:linear-gradient(150deg,#33427a,#232f52);font-size:1.4rem;font-weight:800}.memo-front{background:var(--stage-2);font-size:clamp(1.5rem,8vw,2.2rem);transform:rotateY(180deg)}.memo-card.matched .memo-front{border-color:var(--good);box-shadow:0 0 18px #16b98166}.whack-grid{aspect-ratio:1;grid-template-columns:repeat(3,1fr);gap:10px;width:100%;max-width:400px;display:grid}.whack-hole{border:1px solid var(--stage-line);cursor:pointer;touch-action:manipulation;background:radial-gradient(circle at 50% 30%,#22304e,#10182a 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0;border:0;padding:0 2px;font-size:.78rem}.msg-text{white-space:pre-wrap;word-break:break-word;margin:0;font-size:.94rem}.toast{z-index:60;background:var(--good);color:#fff;box-shadow:var(--shadow);border-radius:999px;padding:11px 20px;font-weight:700;animation:.25s rise;position:fixed;bottom:26px;left:50%;transform:translate(-50%)}@keyframes rise{0%{opacity:0;transform:translate(-50%,12px)}}.prose{max-width:68ch}.prose p{color:var(--muted)}.prose h2{margin-top:28px;font-size:1.1rem}.rules{gap:10px;padding:0;list-style:none;display:grid}.rules li{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);gap:10px;padding:12px 14px;font-size:.94rem;display:flex}.tick{color:var(--good);font-weight:800}.inline-link{color:var(--brand);font-weight:700}.footer{border-top:1px solid var(--line);text-align:center;color:var(--muted);flex-direction:column;align-items:center;gap:10px;padding:20px 0 30px;font-size:.86rem;display:flex}.footer-inner{display:contents}.footer-links{gap:16px;display:flex}.footer-links a:hover{color:var(--ink)}.dot{margin:0 6px}@media (width>=720px){.footer{text-align:left;flex-direction:row;justify-content:space-between}}