body:not(.n310-show-legacy) .nback-tabs,body:not(.n310-show-legacy) #nbackDayNav,body:not(.n310-show-legacy) #nbackModePicker,body:not(.n310-show-legacy) #nbackNPicker,body:not(.n310-show-legacy) .nback-shell,body:not(.n310-show-legacy) .statsgrid,body:not(.n310-show-legacy) .nback-secondary,body:not(.n310-show-legacy) .n208-lab,body:not(.n310-show-legacy) .nback-guide,body:not(.n310-show-legacy) .nback-note{display:none!important}.n310-shell{padding:18px;margin-top:14px}.n310-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.n310-head h2{margin:.15rem 0 .35rem;font-size:clamp(1.35rem,3vw,2rem)}.n310-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.45}.n310-level{min-width:150px;text-align:right;padding:10px 12px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}.n310-level small,.n310-level strong,.n310-level span{display:block}.n310-level strong{font-size:1.5rem}.n310-level span{font-size:.78rem;color:var(--muted);margin-top:3px}.n310-modes{display:flex;gap:7px;overflow-x:auto;padding:12px 0 10px;scrollbar-width:thin}.n310-modes button{white-space:nowrap;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:9px 12px;font:inherit;font-weight:800;cursor:pointer}.n310-modes button.active{background:var(--accent);color:white;border-color:var(--accent)}.n310-setup{margin:0 0 12px;border:1px solid var(--line);border-radius:12px;padding:8px 12px;background:var(--soft)}.n310-setup summary{cursor:pointer;font-weight:800}.n310-setup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:10px 0}.n310-setup label{display:grid;gap:4px;font-size:.85rem;font-weight:800}.n310-setup select{width:100%;padding:9px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:inherit;font:inherit}.n310-setup p{margin:8px 0 2px;color:var(--muted);font-size:.84rem}.n310-live{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:12px 0}.n310-live>div{padding:9px;border:1px solid var(--line);border-radius:12px;background:var(--card)}.n310-live span,.n310-live strong{display:block}.n310-live span{font-size:.72rem;color:var(--muted);font-weight:700}.n310-live strong{font-size:1rem;margin-top:2px}.n310-stage{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px;align-items:center;margin:12px 0}.n310-grid{width:min(100%,430px);aspect-ratio:1;justify-self:center;display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:8px;border:1px solid var(--line);border-radius:22px;background:var(--soft)}.n310-cell{border:1px solid var(--line);border-radius:16px;background:var(--card);transition:transform .08s,background .08s,box-shadow .08s}.n310-cell.lit{background:var(--accent);box-shadow:0 0 0 5px color-mix(in srgb,var(--accent) 18%,transparent);transform:scale(.96)}.n310-grid.audio-only .n310-cell{opacity:.38}.n310-coach{padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--card)}.n310-coach>strong{display:block;font-size:1.25rem;margin:.2rem 0}.n310-coach p{color:var(--muted);font-size:.9rem;line-height:1.5}.n310-compare{padding:10px;border-radius:10px;background:var(--soft);font-size:.85rem;margin:8px 0}.n310-response{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px auto;max-width:680px}.n310-response button{min-height:82px;border:1px solid var(--line);border-radius:16px;background:var(--card);font:inherit;cursor:pointer}.n310-response button strong,.n310-response button small{display:block}.n310-response button strong{font-size:1rem}.n310-response button small{color:var(--muted);margin-top:3px}.n310-response button.marked{background:var(--accent);color:white}.n310-response button:disabled{opacity:.38}.n310-status{text-align:center;min-height:2.2em;color:var(--muted)}.n310-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.n310-result{margin-top:14px;padding:14px;border-radius:14px;background:var(--soft);line-height:1.5}.n310-result strong{font-size:1.1rem}.n310-below{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}.n310-below .card{padding:17px}.n310-below h2{font-size:1rem;margin-top:0}.n310-below p{color:var(--muted);line-height:1.5}.n310-recent-row{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:8px 0;border-bottom:1px solid var(--line)}.n310-recent-row small{grid-column:1/-1;color:var(--muted)}.n310-advanced{margin-top:16px;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:var(--soft)}.n310-advanced summary{font-weight:850;cursor:pointer}.n310-advanced p{color:var(--muted);font-size:.88rem;line-height:1.5}.n310-shell.running .n310-setup,.n310-shell.running .n310-modes{opacity:.55;pointer-events:none}.n310-shell.reduced .n310-cell{transition:none}
@media(max-width:760px){body.n310-page .mobile-dock{display:none}.nback-page{padding-bottom:38px}.gameheader p{display:none}.n310-shell{padding:11px}.n310-head{display:grid;gap:8px}.n310-level{text-align:left;display:flex;align-items:baseline;gap:8px;min-width:0}.n310-level small,.n310-level strong,.n310-level span{display:inline}.n310-head p{font-size:.86rem}.n310-setup-grid{grid-template-columns:1fr}.n310-live{grid-template-columns:repeat(3,1fr);gap:6px}.n310-live>div{padding:7px}.n310-stage{grid-template-columns:1fr;gap:8px;margin:8px 0}.n310-grid{width:min(100%,320px);border-radius:16px}.n310-coach{padding:10px}.n310-coach p{margin:.35rem 0;font-size:.82rem}.n310-response{gap:7px;margin:8px auto}.n310-response button{min-height:66px}.n310-below{grid-template-columns:1fr}.n310-actions .btn{padding:9px 11px}.n310-status{font-size:.85rem;margin:.5rem 0}}
@media(max-width:760px){.preview-note{display:none}.gameheader{padding-top:8px}.gameheader .eyebrow,.gameheader .scorebox,.gameheader h1 small{display:none!important}.gameheader h1{font-size:1.9rem;line-height:1.05;margin:5px 0 8px}.n310-shell{margin-top:8px}.n310-head .eyebrow{font-size:.7rem}.n310-head h2{font-size:1.18rem;margin:.08rem 0}.n310-head p{display:none}.n310-modes{padding:8px 0 7px}.n310-modes button{padding:8px 10px}.n310-setup{margin-bottom:7px;padding:6px 10px}.n310-live{margin:7px 0}.n310-stage{margin:5px 0}}