:root{--font-sans: "Segoe UI";--color-neutral-400: #a3a3a3;--color-accent: rgb(139 92 246);--color-accent-hover: rgb(167 139 250);--bg-app: rgb(15 15 15);--bg-surface: rgb(31 31 31);--bg-surface-hover: rgb(38 38 38);--border-color: rgb(64 64 64);--text-primary: rgb(245 245 245);--text-muted: var(--color-neutral-400);--header-height: 3.5rem;--radius: .5rem}*,*:before,*:after{box-sizing:border-box}html,body,#root{height:100%}html{scrollbar-width:none;-ms-overflow-style:none}html::-webkit-scrollbar{display:none}body{margin:0;font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-primary);line-height:1.5}h1,h2,h3,p,span,ul{margin:0}button,ul{list-style:none;padding:0;margin-bottom:.5rem}a{color:inherit;text-decoration:none}button{font-family:inherit;color:inherit}span{display:inline-block;color:var(--text-muted);font-size:.875rem;margin-bottom:.25rem}.link-button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;border-radius:.375rem;font-size:.875rem;font-weight:500;padding:.375rem .75rem;cursor:pointer;opacity:.75;transition:opacity .15s ease,background-color .15s ease}.link-button:hover{opacity:1;background-color:var(--bg-surface-hover)}.app-shell{min-height:100vh;display:grid;grid-template-rows:var(--header-height) 1fr;grid-template-areas:"header" "main"}.header{grid-area:header;position:sticky;top:0;z-index:10;background-color:var(--bg-surface);border-bottom:1px solid var(--border-color)}.header-inner{width:100%;max-width:1200px;height:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 2rem}.header h1{font-size:1.125rem;font-weight:600}.header h1 a{color:var(--text-primary)}.header-controls{display:flex;align-items:center;gap:1rem}.select-control{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border-color);background:var(--bg-app);color:var(--text-primary);border-radius:var(--radius);padding:.375rem .75rem;font-size:.8125rem;cursor:pointer}.select-control:focus{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 1px var(--color-accent)}.list-group:first-child h3{margin-top:0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin:1.5rem 0 .5rem}.section-heading h3{margin:0}.detail-pane{grid-area:main;width:100%;max-width:1200px;margin:0 auto;padding:2rem}.detail-pane h2{font-size:1.5rem;font-weight:600;margin-bottom:.5rem}.detail-pane h3{font-size:.9375rem;font-weight:600;margin:1.5rem 0 .5rem}.detail-pane p{color:var(--text-muted);font-size:.875rem;margin-bottom:.25rem}.scale-detail ul,.chord-detail ul,.list-group ul{display:flex;flex-wrap:wrap;gap:.5rem}.scale-detail li,.chord-detail li,.list-group li{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius);padding:.375rem .75rem;font-size:.875rem;overflow:hidden}.scale-detail li:not(.note-row),.chord-detail li:not(.note-row),.list-group li{color:var(--color-accent-hover);cursor:pointer}.note-row{-webkit-user-select:none;user-select:none}.note-row.is-playable{cursor:pointer}.note-picker{display:flex;flex-wrap:wrap;gap:.5rem}.note-picker button{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius);padding:.375rem .75rem;font-size:.875rem;cursor:pointer}.note-picker button.is-selected{background-color:var(--color-accent);border-color:var(--color-accent)}.piano{position:relative;height:120px;display:flex;background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius);overflow:hidden}.piano-key-white{flex:1;border-right:1px solid var(--border-color);background-color:#f2f2f2;cursor:pointer}.piano-key-white:last-child{border-right:none}.piano-key-white.is-active{background-color:var(--color-accent)}.piano-key-white.is-root{background-color:var(--color-accent-hover)}.piano-key-black{position:absolute;top:0;width:4.5%;height:62%;background-color:#111;border-radius:0 0 3px 3px;cursor:pointer;z-index:2}.piano-key-black.is-active{background-color:var(--color-accent);border:1px solid var(--border-color)}.piano-key-black.is-root{background-color:var(--color-accent-hover);border:1px solid var(--border-color)}