.lc-shell{color:#153460;background:#fbfcff;min-height:100vh}.lc-main{max-width:1080px;margin:auto;padding:30px 28px 46px}.lc-heading{margin:26px 0 22px}.lc-heading h1{letter-spacing:-1px;margin:0 0 10px;font-size:clamp(34px,5vw,44px);font-weight:800;line-height:1.2}.lc-heading p{color:#506984;margin:0;font-size:17px;line-height:1.6}.lc-level-nav{flex-wrap:wrap;gap:10px;margin-bottom:30px;display:flex}.lc-level-nav a{border:1px solid var(--level-border);background:var(--level-bg);min-height:44px;color:var(--level-ink);border-radius:8px;justify-content:center;align-items:center;padding:9px 22px;font-size:16px;font-weight:650;text-decoration:none;display:inline-flex}.lc-level-section{margin:0 0 32px;scroll-margin-top:20px}.lc-section-heading{border-bottom:2px solid var(--level-border);align-items:baseline;gap:12px;margin-bottom:16px;padding-bottom:10px;display:flex}.lc-section-heading h2{color:var(--level-ink);margin:0;font-size:25px;font-weight:750;line-height:1.2}.lc-section-heading>span{color:#61788e;font-size:14px}.lc-cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;display:grid}.lc-card{border:1px solid var(--level-border);background:#fff;border-radius:14px;flex-direction:column;min-width:0;display:flex;overflow:hidden}.lc-card>header{background:var(--level-bg);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px;padding:16px 18px;display:flex}.lc-card h3{color:var(--level-ink);margin:0;font-size:21px;font-weight:750;line-height:1.2}.lc-card header>span{color:var(--level-ink);font-size:14px}.lc-preview{background:var(--level-light);flex:1;justify-content:center;align-items:center;padding:18px;display:flex}.lc-mini{isolation:isolate;width:130px;display:grid}.lc-mini>span{aspect-ratio:1;min-width:0;color:var(--level-ink);justify-content:center;align-items:center;font-size:7px;font-weight:700;line-height:1;display:flex}.lc-mini-cell{box-shadow:inset 0 0 0 .55px var(--level-ink);background:#fff}.lc-mini-given{background:var(--level-mark)}.lc-mini-block{background:color-mix(in srgb,var(--level-ink) 36%,var(--level-light))}.lc-mini-void{background:0 0}.lc-play-link{background:var(--level-bg);border-top:1px solid var(--level-border);min-height:48px;color:var(--level-ink);justify-content:center;align-items:center;gap:10px;font-size:16px;font-weight:700;text-decoration:none;display:flex}.lc-play-link:hover,.lc-level-nav a:hover{background:var(--level-mark)}.lc-play-link:focus-visible{outline:3px solid var(--level-ink);outline-offset:-4px}.lc-level-nav a:focus-visible{outline:3px solid var(--level-ink);outline-offset:-4px}.lc-rules{max-width:740px;margin-top:30px}.lc-rules h2{margin:0 0 10px;font-size:21px;font-weight:750}.lc-rules p{color:#59718c;margin:8px 0;font-size:16px;line-height:1.7}@media (max-width:800px){.lc-main{padding:22px 18px 40px}.lc-cards{gap:14px}.lc-card>header{padding:14px}.lc-card h3{font-size:20px}}@media (max-width:640px){.lc-main{max-width:460px}.lc-heading{margin-top:22px}.lc-heading p{font-size:16px}.lc-level-nav{gap:8px;margin-bottom:26px}.lc-level-nav a{flex:1;padding:9px 12px}.lc-cards{grid-template-columns:minmax(0,1fr)}.lc-card{grid-template-rows:1fr auto;grid-template-columns:1fr 116px;display:grid}.lc-card>header{flex-direction:column;grid-area:1/1;place-content:center;align-items:flex-start;gap:10px;padding:20px}.lc-preview{border-left:1px solid var(--level-border);grid-area:1/2/3;padding:14px 12px}.lc-mini{width:91px}.lc-mini>span{font-size:5px}.lc-play-link{grid-area:2/1;justify-content:flex-start;padding:12px 20px}.lc-section-heading h2{font-size:23px}}