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264px);margin:34px auto 0;padding:30px;box-shadow:0 20px 70px #0007}.obs-heading{grid-template-columns:1.15fr .85fr;align-items:end;gap:40px;display:grid}.obs-heading small{color:#54dfbd;letter-spacing:.14em;font:700 .62rem DM Mono,monospace}.obs-heading h2{letter-spacing:-.055em;max-width:780px;margin:10px 0 0;font-size:clamp(2rem,3.2vw,3.4rem);line-height:.97}.obs-heading p{color:#96a5b5;margin:0;line-height:1.65}.obs-steps{grid-template-columns:repeat(4,1fr);gap:10px;margin-top:28px;display:grid}.obs-steps article{background:#0c1420;border:1px solid #2c3b4d;border-radius:12px;min-height:150px;padding:18px}.obs-steps b,.obs-steps strong,.obs-steps span{display:block}.obs-steps b{color:#a970ff;font:700 .7rem DM Mono,monospace}.obs-steps strong{margin:20px 0 8px}.obs-steps span{color:#8998a9;font-size:.82rem;line-height:1.5}.obs-actions{align-items:center;gap:10px;margin-top:18px;display:flex}.obs-actions button,.obs-actions a{color:#edf3f8;background:#17212e;border:1px solid #34465c;border-radius:9px;padding:11px 14px;font-weight:750}.obs-actions button{color:#071019;background:linear-gradient(135deg,#54dfbd,#58adff);border:0}.obs-actions>span{color:#7f90a3}.arcade-banner-ad{color:#718095;letter-spacing:.13em;background:#0b111c99;border:1px dashed #45536a;border-radius:12px;justify-content:center;align-items:center;gap:14px;width:min(1520px,100% - 264px);min-height:92px;margin:18px auto 0;font:650 .6rem DM Mono,monospace;display:flex}.arcade-banner-ad small{color:#536176;letter-spacing:0}@keyframes arcade-shake{20%,60%{transform:translate(-7px)}40%,80%{transform:translate(7px)}}@media (width<=1280px){.arcade-layout{grid-template-columns:minmax(0,1fr);max-width:1120px}.ad-rail{display:none}.obs-guide,.arcade-banner-ad{width:min(1120px,100%)}}@media (width<=900px){.obs-heading{grid-template-columns:1fr;gap:16px}.obs-steps{grid-template-columns:repeat(2,1fr)}}@media (width<=760px){.arcade{padding:0 8px 14px}.arcade-header{grid-template-columns:1fr auto;padding:10px 0}.back-library{text-align:center;grid-area:2/1/auto/-1;width:100%}.arcade-brand b,.room-tools strong{display:none}.arcade-layout{min-height:0;margin-top:10px}.arcade-viewport{min-height:0;max-height:none}.arcade-gamebar{flex-wrap:wrap;gap:9px}.arcade-gamebar .hearts{margin-left:0}.arcade-controls>span{display:none}.arcade-controls{flex-wrap:wrap}.arcade-controls .score-notice,.restart-run{text-align:center;width:100%;margin-left:0}.touch-controls{width:100%;display:flex}.touch-controls button{flex:1}.obs-guide{padding:22px 16px}.obs-steps{grid-template-columns:1fr}.obs-actions{flex-direction:column;align-items:stretch}.obs-actions button,.obs-actions a{text-align:center}.arcade-banner-ad small{display:none}}