:root{color-scheme:dark;--ink:#f7f5ef;--muted:#a8b1bd;--panel:#151a22;--line:#313a48;--acid:#d8ff5e;--coral:#ff6b5f;--blue:#61b8ff;--wood:#9a5d32;--wood2:#60391f;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#090b0f;color:var(--ink)}body{background:radial-gradient(circle at 85% 0,#263552 0,transparent 34rem),radial-gradient(circle at 5% 30%,#222418 0,transparent 35rem),#090b0f}.shell{width:min(1180px,calc(100% - 32px));margin:auto;min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;justify-content:space-between;align-items:center;padding:24px 0;border-bottom:1px solid #ffffff18}.brand{display:flex;gap:12px;align-items:center;color:inherit;text-decoration:none}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--acid);color:#111;font-size:24px}.brand strong,.brand small{display:block}.brand small{color:var(--muted);margin-top:2px}.stats{display:flex;gap:24px}.stats span{min-width:58px}.stats small,.stats strong{display:block}.stats small{text-transform:uppercase;letter-spacing:.12em;color:var(--muted);font-size:10px}.stats strong{font-size:20px;margin-top:3px}.hero{display:grid;grid-template-columns:1fr 440px;gap:50px;align-items:end;padding:58px 0 34px}.eyebrow{color:var(--acid);font-weight:800;letter-spacing:.16em;text-transform:uppercase;font-size:12px}.hero h1{font-size:clamp(42px,6vw,78px);line-height:.93;letter-spacing:-.055em;margin:12px 0 20px}.hero h1 em{font-style:normal;color:var(--acid)}.lede{max-width:620px;color:#c4cbd3;font-size:18px;line-height:1.55}.controls-card{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:18px;border:1px solid var(--line);border-radius:18px;background:#11151bd9;box-shadow:0 24px 70px #0007}.controls-card label{color:var(--muted);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.1em}.controls-card select{display:block;width:100%;margin-top:7px;background:#090c11;color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:11px;font:inherit}.controls-card .primary{align-self:end}.primary{border:0;border-radius:9px;background:var(--acid);color:#111;padding:13px 20px;font-weight:900;font-size:15px;cursor:pointer}.primary:hover{filter:brightness(1.08)}.stage{border:1px solid var(--line);border-radius:24px;overflow:hidden;background:#0f131a;box-shadow:0 30px 80px #0008}.runway{position:relative;height:225px;overflow:hidden;background:linear-gradient(90deg,#0c1118,#182232 50%,#0c1118)}.runway:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(90deg,transparent 0,transparent calc(8.333% - 1px),#ffffff0b calc(8.333% - 1px),#ffffff0b 8.333%)}.target-zone{position:absolute;left:7%;right:7%;bottom:19px;height:58px;border:2px solid #d8ff5e55;border-radius:50%;box-shadow:0 0 34px #d8ff5e22;display:grid;place-items:center;color:#d8ff5e66;font-weight:900;letter-spacing:.3em}.note-orb{position:absolute;left:50%;top:20px;translate:-50% 0;width:84px;height:84px;border-radius:50%;display:grid;place-items:center;background:var(--acid);color:#111;font-weight:950;font-size:36px;box-shadow:0 0 0 8px #d8ff5e15,0 14px 35px #0008;opacity:.18;transition:background .15s,box-shadow .15s}.note-orb.active{opacity:1}.note-orb.correct{background:var(--blue)}.note-orb.wrong{background:var(--coral)}.runway-copy{position:absolute;left:24px;top:22px;display:flex;flex-direction:column;gap:4px}.runway-copy span{font-weight:800}.runway-copy small{color:var(--muted)}.timer{position:absolute;inset:auto 0 0;height:5px;background:#ffffff0c}.timer i{display:block;height:100%;width:0;background:var(--acid)}.neck-wrap{padding:28px 24px;background:linear-gradient(180deg,#121820,#0b0f14)}.neck-head{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.11em;margin-bottom:12px}.fretboard{display:grid;grid-template-columns:repeat(13,minmax(56px,1fr));min-width:780px;border-radius:11px;overflow:hidden;background:linear-gradient(var(--wood),var(--wood2));box-shadow:inset 0 0 30px #1c0c04}.fretboard button{position:relative;height:122px;border:0;border-right:3px solid #d7d7d799;background:transparent;color:#fff;cursor:pointer;font:inherit;text-shadow:0 2px 3px #000}.fretboard button:first-child{background:#171a1f;border-right:7px solid #f4ecd5}.fretboard button:hover,.fretboard button:focus-visible{background:#d8ff5e33;outline:2px solid var(--acid);outline-offset:-3px}.fretboard button .num{position:absolute;top:8px;left:50%;translate:-50%;font-size:11px;color:#ffffffaa}.fretboard button .note{display:grid;place-items:center;margin:auto;width:42px;height:42px;border-radius:50%;background:#07090cdd;font-size:16px;font-weight:900}.fretboard button.hit .note{background:var(--blue);color:#071321;scale:1.18}.fretboard button.miss .note{background:var(--coral);color:#200}.neck-wrap{overflow:auto}.keys{color:var(--muted);text-align:center;margin:18px 0 0;font-size:12px}kbd{border:1px solid #4b5665;border-bottom-width:3px;border-radius:4px;background:#1b222d;padding:2px 6px;color:#fff}.actions{display:flex;gap:10px;padding:0 24px 22px}.actions button{background:#181f29;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:10px 15px;cursor:pointer}.actions button:disabled{opacity:.4;cursor:not-allowed}footer{display:flex;justify-content:space-between;color:#737d8a;font-size:12px;padding:24px 2px 34px}footer a{color:#b8c4d3}.modal{position:fixed;inset:0;background:#050608d9;display:grid;place-items:center;padding:20px}.modal[hidden]{display:none}.modal-card{width:min(460px,100%);background:#151b23;border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:0 30px 100px #000}.modal-card h2{font-size:36px;margin:10px 0}.modal-card p:not(.eyebrow){color:var(--muted);line-height:1.6}.modal-card .primary{width:100%;margin-top:10px}@media(max-width:850px){.hero{grid-template-columns:1fr;padding-top:34px}.stats{gap:12px}.stats span{min-width:44px}.fretboard button{height:105px}footer{gap:16px;flex-direction:column}}@media(max-width:560px){.shell{width:min(100% - 20px,1180px)}.topbar{align-items:flex-start}.stats{display:grid;grid-template-columns:1fr 1fr}.hero h1{font-size:43px}.controls-card{grid-template-columns:1fr}.runway{height:205px}.runway-copy{max-width:52%}.note-orb{left:70%}}