:root{--bg:#f5f3ee;--surface:#fff;--surface-2:#efece5;--text:#1d2433;--text-muted:#5b6372;--border:#d9d4c8;--accent:#c2410c;--accent-text:#fff;--accent-soft:#fde3d0;--held:#e0892b;--held-soft:#fbe3c6;--danger:#b3261e;--danger-soft:#fbe2df;--case:#141821;--case-top:#232937;--case-edge:#2e3546;--white-key:#fbfbfc;--white-key-shade:#cfd3db;--black-key:#12141b;--black-key-shade:#353b4c;--lcd-bg:#0c1317;--lcd-edge:#26313a;--lcd-text:#c6f1df;--lcd-dim:#6e8c84;--font-mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--white-w:clamp(40px, calc((100vw - 64px) / 14), 64px);--black-w:calc(var(--white-w) * .62);--key-h:clamp(150px, 26vw, 220px);--radius:4px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);-webkit-text-size-adjust:100%;font-family:system-ui,-apple-system,Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,sans-serif;line-height:1.6}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#14161c;--surface:#1d2029;--surface-2:#262a35;--text:#e8e9ee;--text-muted:#a3a8b6;--border:#363b49;--accent:#ff9f4a;--accent-text:#1f1305;--accent-soft:#4a2a14;--held:#f2a65a;--held-soft:#4a3520;--danger:#ff8a80;--danger-soft:#45201d;--case:#0a0c11;--case-top:#171b25;--case-edge:#282e3c;--white-key:#e4e6eb;--white-key-shade:#a9aebb;--black-key:#07080b;--black-key-shade:#2a2f3c}}*,:before,:after{box-sizing:border-box}body{background:var(--bg);min-width:320px;margin:0}button,input,select{font:inherit;color:inherit}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}fieldset{border:0;min-width:0;margin:0;padding:0}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app{max-width:1040px;margin:0 auto;padding:16px}.app-header{border-bottom:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px;margin-bottom:16px;padding-bottom:16px;display:flex}.brand h1{letter-spacing:.01em;margin:0;font-size:1.5rem}.brand__tagline{color:var(--text-muted);margin:0;font-size:.875rem}.controls{flex-wrap:wrap;align-items:center;gap:12px 20px;display:flex}.led{--led:color-mix(in srgb, var(--text-muted) 35%, transparent);--led-glow:transparent;background:var(--led);width:12px;height:3px;box-shadow:0 0 6px 1px var(--led-glow);border-radius:2px;flex:none}[aria-pressed=true]>.led{--led:var(--accent);--led-glow:color-mix(in srgb, var(--accent) 70%, transparent)}.segmented{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-2);gap:3px;padding:3px;display:inline-flex}.segmented__button{min-height:40px;color:var(--text-muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:2px;align-items:center;gap:8px;padding:0 14px;display:inline-flex}.segmented__button[aria-pressed=true]{border-color:var(--border);background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px #0000001f}.volume,.field{align-items:center;gap:8px;display:inline-flex}.volume input{width:120px;accent-color:var(--accent)}.volume__value{text-align:right;font-variant-numeric:tabular-nums;min-width:2.5ch;color:var(--text-muted)}.field select{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);min-height:40px;padding:0 10px}.octave{align-items:center;gap:8px;display:inline-flex}.octave__range{text-align:center;font-variant-numeric:tabular-nums;min-width:6.5em;font-weight:600}.icon-button{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;width:40px;height:40px;font-size:1.125rem}.icon-button:disabled,.button:disabled{opacity:.45;cursor:not-allowed}.mode-hint,.key-guide{color:var(--text-muted);margin:12px 0 8px;font-size:.875rem}.key-guide{margin-top:8px}.scope{border:1px solid var(--lcd-edge);border-radius:var(--radius);background:var(--lcd-bg);margin:0 0 10px;padding:8px 10px 6px;box-shadow:inset 0 2px 10px #0000008c}.scope__screen{width:100%;height:88px;display:block}.scope__caption{font-family:var(--font-mono);letter-spacing:.04em;color:var(--lcd-dim);flex-wrap:wrap;justify-content:space-between;gap:0 12px;margin-top:4px;font-size:.6875rem;display:flex}.keyboard-case{border:1px solid var(--case-edge);border-radius:var(--radius);background:linear-gradient(to bottom, var(--case-top), var(--case));padding:10px 10px 6px;box-shadow:inset 0 1px #ffffff14,0 6px 16px #0000002e}.keyboard-scroll{overscroll-behavior-x:contain;scrollbar-color:var(--case-edge) transparent;-webkit-overflow-scrolling:touch;padding-bottom:6px;overflow-x:auto}.keyboard{width:calc(var(--white-w) * var(--white-count));height:var(--key-h);-webkit-user-select:none;user-select:none;margin:0 auto;display:flex;position:relative}.keyboard:before{content:"";z-index:2;pointer-events:none;background:linear-gradient(#00000073,#0000);height:10px;position:absolute;inset:0 0 auto}.key{--led:transparent;--led-glow:transparent;cursor:pointer;touch-action:manipulation;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;border:0;flex-direction:column;justify-content:flex-end;align-items:center;gap:3px;padding:0 0 14px;transition:background-color 80ms,box-shadow .12s,transform 60ms;display:flex;position:relative}.key:after{content:"";background:var(--led);height:3px;box-shadow:0 0 6px 1px var(--led-glow);border-radius:2px;position:absolute;bottom:3px;left:22%;right:22%}.key:focus-visible{outline-offset:-6px}.key--white{--led:#0000001a;flex:0 0 var(--white-w);background-color:var(--white-key);height:100%;box-shadow:inset 0 -9px 0 var(--white-key-shade), inset 0 -10px 0 #ffffff80;color:#2a2f3c;background-image:linear-gradient(#0000001a,#0000 14% 78%,#0000000d);background-clip:padding-box;border-inline:1px solid #0000;border-radius:0 0 6px 6px}.key--black{--led:#ffffff14;z-index:1;width:var(--black-w);background:linear-gradient(to bottom, var(--black-key), var(--black-key-shade) 87%, var(--black-key) 88%, var(--black-key));color:#f0f0f0;border-radius:0 0 5px 5px;height:62%;padding-bottom:16px;position:absolute;top:0;box-shadow:inset 1px 0 #ffffff12,inset -1px 0 #00000080,0 4px 6px #00000073}.key__label{font-size:.75rem;font-weight:600;line-height:1.2}.key__hint{opacity:.55;font-size:.625rem;line-height:1.2;font-family:var(--font-mono)}.key__marker{font-size:.625rem;line-height:1;position:absolute;top:14px}.key__degree{background:var(--case);color:#fff;text-align:center;border-radius:999px;min-width:2em;padding:1px 5px;font-size:.6875rem;font-weight:700;line-height:1.4}.key__degree--root{background:var(--accent);color:var(--accent-text)}.key--black .key__degree{color:#fff;background:0 0;border:1px solid #ffffffbf;min-width:0;padding:0 3px;font-size:.625rem}.key--black .key__degree--root{color:var(--black-key);background:#fff;border-color:#fff}.key.is-selected{--led:var(--accent);--led-glow:color-mix(in srgb, var(--accent) 70%, transparent)}.key--white.is-selected{background-color:color-mix(in srgb, var(--accent) 20%, var(--white-key));box-shadow:inset 0 0 0 3px var(--accent), inset 0 -9px 0 color-mix(in srgb, var(--accent) 35%, var(--white-key-shade)), inset 0 0 18px color-mix(in srgb, var(--accent) 35%, transparent)}.key--black.is-selected{--led:#fff;--led-glow:var(--accent);background:linear-gradient(to bottom, color-mix(in srgb, var(--accent) 35%, var(--black-key)), color-mix(in srgb, var(--accent) 65%, var(--black-key)) 87%, color-mix(in srgb, var(--accent) 40%, var(--black-key)) 88%);box-shadow:inset 0 0 0 3px color-mix(in srgb, var(--accent) 45%, #fff), 0 0 16px color-mix(in srgb, var(--accent) 60%, transparent)}.key.is-selected .key__marker{color:var(--accent);text-shadow:0 0 6px var(--accent)}.key--black.is-selected .key__marker{color:#fff}.key.is-held{--led:var(--held);--led-glow:color-mix(in srgb, var(--held) 75%, transparent);transform:translateY(2px)}.key--white.is-held{background-color:color-mix(in srgb, var(--held) 30%, var(--white-key));box-shadow:inset 0 -4px 0 color-mix(in srgb, var(--held) 40%, var(--white-key-shade)), inset 0 4px 8px #0003, inset 0 0 18px color-mix(in srgb, var(--held) 45%, transparent)}.key--black.is-held{--led:#fff;--led-glow:var(--held);background:linear-gradient(to bottom, color-mix(in srgb, var(--held) 35%, var(--black-key)), color-mix(in srgb, var(--held) 70%, var(--black-key)) 94%, color-mix(in srgb, var(--held) 40%, var(--black-key)) 95%);box-shadow:inset 0 4px 8px #00000059, 0 0 16px color-mix(in srgb, var(--held) 60%, transparent)}.chord-actions{flex-wrap:wrap;align-items:center;gap:10px 12px;margin-top:12px;display:flex}.chord-actions__count{color:var(--text-muted);font-size:.875rem}.button{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);cursor:pointer;min-height:44px;padding:0 20px;font-weight:600}.button--primary{border-color:var(--accent);background:var(--accent);color:var(--accent-text)}.button--toggle{align-items:center;gap:8px;display:inline-flex}.button__state{min-width:2em;color:var(--text-muted);text-align:left;font-size:.75rem}.button--toggle[aria-pressed=true] .button__state{color:var(--text)}.messages{margin-top:12px}.message{border-radius:var(--radius);background:var(--accent-soft);margin:0 0 6px;padding:8px 12px;font-size:.875rem}.message--error{background:var(--danger-soft);color:var(--danger)}.analysis{gap:24px 40px;margin-top:24px;display:grid}.analysis>*{min-width:0}.result{border:1px solid var(--lcd-edge);border-radius:var(--radius);background:var(--lcd-bg);min-height:116px;color:var(--lcd-text);flex-wrap:wrap;align-items:flex-start;gap:12px 48px;padding:16px 20px;display:flex;box-shadow:inset 0 2px 10px #0000008c}.result__label{letter-spacing:.08em;color:var(--lcd-dim);margin:0;font-size:.75rem;font-weight:600}.result__symbol{font-family:var(--font-mono);text-shadow:0 0 12px color-mix(in srgb, var(--lcd-text) 35%, transparent);margin:0;font-size:2.5rem;font-weight:600;line-height:1.2}.result__sub{margin:2px 0 0}.result__none{margin:4px 0 0;font-size:1.125rem;font-weight:600}.result__placeholder{color:var(--lcd-dim);margin:0}.result__alternatives ul{gap:2px;margin:4px 0 0;padding:0;list-style:none;display:grid}.result__alternatives li{align-items:baseline;gap:10px;display:flex}.result__alt-symbol{min-width:5ch;font-family:var(--font-mono);font-size:1.25rem;font-weight:600}.result__alt-name{color:var(--lcd-dim);font-size:.8125rem}.panel{border-top:1px solid var(--border);padding-top:12px}.panel__title{letter-spacing:.04em;margin:0 0 8px;font-size:.875rem}.panel__subtitle{margin:16px 0 6px;font-size:.875rem}.panel p{margin:0 0 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1fr}.analysis .result{grid-column:1/-1}}@media (width<=560px){.app{padding:12px}.app-header{flex-direction:column;align-items:stretch;gap:8px;margin-bottom:10px;padding-bottom:10px}.brand{flex-wrap:wrap;align-items:baseline;gap:0 10px;display:flex}.brand h1{font-size:1.25rem;line-height:1.3}.brand__tagline{font-size:.75rem}.controls--header,.controls--sound{gap:8px 12px}.segmented__button{gap:6px;min-height:36px;padding:0 10px}.volume{flex:1 0 140px;gap:6px;min-width:0}.volume input{flex:1;width:auto;min-width:0}.field{flex:1 0 140px;min-width:0}.field>span{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.field select{flex:1;min-width:0;padding:0 6px}.octave{gap:4px}.octave__title{display:none}.octave__range{min-width:4.5em}.mode-hint{margin:8px 0 6px;font-size:.8125rem;line-height:1.5}.scope{margin-bottom:8px;padding:6px 8px 4px}.scope__screen{height:60px}.scope__caption{margin-top:2px}.key--white .key__degree+.key__hint{display:none}.chord-actions{gap:8px;margin-top:8px}.chord-actions .button{flex:40%;min-height:40px}.chord-actions .button--toggle{flex:none;gap:6px;padding:0 12px}.chord-actions__count{order:0;margin-left:auto}.chord-actions .button:not(.button--toggle){order:1}.messages{margin-top:8px}.analysis{gap:16px;margin-top:16px}.result{gap:8px 24px;min-height:88px;padding:10px 14px}.result__symbol{font-size:2rem}.panel{padding-top:10px}.panel__title{margin-bottom:4px}.panel__subtitle{margin:12px 0 4px}.notes-table{font-size:.875rem}.notes-table th,.notes-table td{padding:4px 8px}.structure{font-size:1rem}.interval-list{gap:2px}.interval-list__notes{min-width:7em}.app-footer{margin-top:16px}}@media (hover:none) and (pointer:coarse){.key-guide{display:none}}@media (prefers-reduced-motion:reduce){.key{transition:none}}