.sequence-shell{width:min(1080px,calc(100% - 32px))}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.game-card{overflow:hidden;border:3px solid var(--ink);border-radius:5px;background:var(--panel);box-shadow:10px 10px 0 var(--shadow)}.game-heading{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:end;padding:30px 34px;border-bottom:3px solid var(--ink)}.eyebrow,.section-kicker{margin:0;color:var(--gold);font-size:.78rem;font-weight:800;letter-spacing:.12em}.eyebrow{margin-bottom:10px}.game-heading h1{max-width:820px;margin:0;font-size:clamp(2.25rem,7vw,4.8rem);line-height:.94}.lede{max-width:720px;margin:18px 0 0;color:var(--muted);line-height:1.6}.progress-box{min-width:150px;padding:16px;border:2px solid var(--line);border-radius:5px;background:#0a2026;text-align:center}.progress-box>span,.stat>span{display:block;margin-bottom:7px;color:var(--muted);font-size:.76rem;font-weight:800;letter-spacing:.1em}.progress-box strong{color:var(--gold);font-size:1.6rem}.mode-panel{display:flex;gap:20px;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:2px solid var(--line);background:#0a2026}.mode-switch{display:flex;flex:0 0 auto;gap:6px}.mode-switch button,.mute-button{border:2px solid var(--line);border-radius:5px;background:transparent;color:var(--muted);font-weight:800;cursor:pointer}.mode-switch button{padding:10px 14px}.mode-switch button[aria-pressed="true"]{border-color:var(--gold);background:var(--gold);color:var(--night)}.mode-description{margin:0;color:var(--muted);font-size:.84rem;line-height:1.45;text-align:right}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-bottom:3px solid var(--ink)}.stat{min-width:0;padding:18px 12px;border-right:2px solid var(--line);text-align:center}.stat:last-child{border-right:0}.stat strong{overflow-wrap:anywhere;font-size:clamp(1rem,3vw,1.55rem)}
.sequence-stage{display:flex;min-height:760px;flex-direction:column;align-items:center;padding:20px 28px 34px;background:linear-gradient(rgba(88,199,215,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(88,199,215,.04) 1px,transparent 1px),radial-gradient(circle at 50% 46%,#173b45 0,transparent 60%);background-size:24px 24px,24px 24px,auto}.audio-toolbar{display:flex;width:min(780px,100%);gap:14px;align-items:center;justify-content:space-between}.audio-toolbar p{margin:0;color:var(--muted);font-size:.72rem;line-height:1.45;text-align:right}.mute-button{display:flex;flex:0 0 auto;gap:7px;align-items:center;padding:9px 12px;color:var(--blue)}.mute-button[aria-pressed="true"]{border-color:var(--red);color:var(--red)}.mute-button:disabled{cursor:default;opacity:.55}.timing-wrap{width:min(780px,100%);margin-top:14px}.timing-wrap[hidden]{visibility:hidden}.timing-meta{display:flex;justify-content:space-between;margin-bottom:6px;color:var(--muted);font-size:.7rem;font-weight:800;letter-spacing:.1em}.timing-meta strong{color:var(--blue)}.timing-track{height:15px;overflow:hidden;border:2px solid var(--line);border-radius:5px;background:#071a1f}.timing-track span{display:block;width:100%;height:100%;border-radius:3px;background:var(--green);transform:scaleX(1);transform-origin:left center;will-change:transform}.timing-track span.is-danger{background:var(--red)}.stage-copy{min-height:124px;padding-top:20px;text-align:center}.stage-kicker{margin:0 0 8px;color:var(--gold);font-size:.76rem;font-weight:800;letter-spacing:.14em}.stage-copy h2{margin:0;font-size:clamp(1.5rem,5vw,2.45rem)}.stage-copy p:not(.stage-kicker){max-width:660px;margin:9px auto 0;color:var(--muted);line-height:1.5}.note-grid{display:grid;width:min(780px,100%);grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.note-button{display:grid;min-width:0;min-height:190px;grid-template-rows:1fr auto auto;gap:6px;place-items:center;padding:16px 10px;border:3px solid var(--ink);border-radius:5px;box-shadow:6px 6px 0 var(--shadow);color:#071a1f;cursor:pointer;touch-action:manipulation;transition:transform 90ms ease,filter 90ms ease,box-shadow 90ms ease}.note-button strong{font-size:clamp(2.4rem,7vw,4.5rem);line-height:1}.note-button>span{font-size:1.5rem}.note-button kbd{padding:2px 8px;border:1px solid #071a1f66;border-radius:5px;background:#071a1f22;color:#071a1f}.note-1{background:#58c7d7}.note-2{background:#f7c948}.note-3{background:#53dd83}.note-4{background:#ef5965}.note-button.is-pulse{z-index:1;filter:brightness(1.3);outline:5px solid var(--ink);outline-offset:3px;transform:translateY(-5px) scale(1.03);box-shadow:9px 11px 0 var(--shadow)}.note-button:disabled{cursor:default;opacity:.68}.note-button.is-pulse:disabled{opacity:1}.input-progress{min-height:29px;margin:12px 0 2px}.input-progress span{display:flex;max-width:min(760px,90vw);gap:5px;flex-wrap:wrap;justify-content:center}.input-progress i{width:10px;height:10px;border:1px solid var(--line);border-radius:5px;background:#12313a}.input-progress i.is-done{border-color:var(--green);background:var(--green)}.result-flash{display:flex;min-height:48px;flex-direction:column;align-items:center;justify-content:center;margin:4px 0}.result-flash[hidden]{visibility:hidden}.result-flash strong{font-size:1.35rem}.result-flash span{color:var(--muted);font-size:.78rem}.play-button{display:grid;width:min(430px,100%);min-height:64px;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:12px 18px;border:3px solid var(--gold);border-radius:5px;background:var(--gold);box-shadow:5px 5px 0 var(--shadow);color:var(--night);cursor:pointer}.play-button[hidden]{display:none}.play-button kbd{padding:3px 7px;border:1px solid #755e12;border-radius:5px;background:#d8aa25}.primary-button{width:min(430px,100%);border-radius:5px}.control-note{margin:14px 0 0;color:var(--muted);font-size:.74rem;line-height:1.5;text-align:center}.mode-switch button:focus-visible,.mute-button:focus-visible,.note-button:focus-visible,.play-button:focus-visible,.primary-button:focus-visible,.related-links a:focus-visible,.faq-list summary:focus-visible{outline:4px solid var(--blue);outline-offset:3px}.sequence-stage[data-state="correct"] .note-grid{outline:3px solid var(--green);outline-offset:6px}.sequence-stage[data-state="wrong"] .note-grid,.sequence-stage[data-state="game-over"] .note-grid{outline:3px solid var(--red);outline-offset:6px}
.content-section,.faq-section,.related-section{margin-top:48px}.content-section h2,.faq-section h2,.related-section h2,.info-panel h2{margin:8px 0 0}.steps-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:0;list-style:none}.steps-list li,.info-panel,.faq-list details,.related-links a{border:2px solid var(--line);border-radius:5px;background:var(--panel)}.steps-list li{display:flex;gap:14px;padding:20px}.steps-list li>span{color:var(--gold);font-size:1.25rem;font-weight:900}.steps-list p,.info-panel p,.faq-list p{margin:0;color:var(--muted);line-height:1.65}.reading-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:32px}.info-panel{padding:26px}.info-panel h2{margin-bottom:16px}.info-panel p+p{margin-top:12px}.faq-list{display:grid;gap:10px;margin-top:18px}.faq-list details{padding:18px 20px}.faq-list summary{color:var(--ink);font-weight:800;cursor:pointer}.faq-list p{margin-top:12px}.related-links{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}.related-links a{display:flex;gap:5px;flex-direction:column;padding:18px;color:var(--ink);text-decoration:none}.related-links a:hover{border-color:var(--gold)}.related-links small{color:var(--muted)}
@media(max-width:720px){.sequence-shell{width:min(100% - 20px,1080px)}.topbar{align-items:flex-start}.topbar-meta{flex-wrap:wrap;justify-content:flex-end}.game-heading{grid-template-columns:1fr;gap:18px;padding:24px 20px}.progress-box{min-width:0}.mode-panel{align-items:stretch;flex-direction:column}.mode-switch button{flex:1}.mode-description{text-align:left}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:2px solid var(--line)}.sequence-stage{padding:18px 12px 28px}.audio-toolbar{align-items:flex-start}.audio-toolbar p{max-width:230px}.note-grid{grid-template-columns:repeat(2,1fr);gap:9px}.note-button{min-height:135px}.steps-list,.reading-grid,.related-links{grid-template-columns:1fr}}
@media(max-width:430px){.topbar-meta{max-width:210px}.topbar-link{font-size:.63rem}.game-heading h1{font-size:clamp(2rem,10.5vw,3rem)}.stage-copy{min-height:145px}.audio-toolbar p{font-size:.64rem}.note-button{min-height:120px;padding:10px}.note-button strong{font-size:2.5rem}}
@media(prefers-reduced-motion:reduce){.note-button{transition:none}.note-button.is-pulse{transform:none}}