*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;width:100%}.piano-container{background:#e3e3e3;padding:20px;border-radius:12px;box-shadow:0 20px 50px #00000026,inset 0 1px 1px #fffc;display:flex;flex-direction:column;gap:10px;width:fit-content;-webkit-user-select:none;user-select:none;position:relative}.piano-top-bar{display:flex;justify-content:space-between;align-items:center;padding:0 10px;height:60px}.speaker-grille{width:60px;height:60px;background-image:radial-gradient(#aaa 20%,transparent 20%);background-size:6px 6px;opacity:.6}.piano-title{font-family:Inter,sans-serif;font-weight:700;font-size:24px;letter-spacing:.1em;text-transform:uppercase;color:#ccc;text-shadow:1px 1px 0 rgba(255,255,255,.8),-1px -1px 0 rgba(0,0,0,.1);margin-left:20px;margin-right:auto}.instrument-selector{position:relative}.instrument-select{appearance:none;background:#d4d4d4;border:none;padding:8px 12px;border-radius:6px;font-family:Inter,sans-serif;font-size:12px;font-weight:600;color:#555;cursor:pointer;box-shadow:inset 0 1px 3px #0000001a;outline:none;transition:all .2s}.instrument-select:hover{background:#ccc;color:#333}.instrument-select:focus{box-shadow:inset 0 1px 3px #0003,0 0 0 2px #0000001a}.piano-keys-area{display:flex;position:relative;height:160px;align-items:flex-end;padding-top:0;transition:opacity .3s}.piano-keys-area.loading{opacity:.5;pointer-events:none}.key{cursor:pointer;transition:transform .1s cubic-bezier(.1,.7,1,.1),background .1s;position:relative;z-index:1;display:flex;justify-content:center;align-items:flex-end;padding-bottom:10px}.key.white{width:50px;height:100px;background:#f4f4f4;border-radius:25px;margin:0 4px;box-shadow:0 6px #ccc,0 10px 10px #0000001a;z-index:1}.key.white:active,.key.white.active{transform:translateY(4px);box-shadow:0 2px #ccc,0 4px 4px #0000001a;background:#fafafa}.key.black{width:0;padding:0;margin:0;border:none;background:transparent;box-shadow:none;position:relative;z-index:10;height:0;align-self:flex-start}.key.black:after{content:"";display:block;position:absolute;left:-18px;top:30px;width:36px;height:36px;background:#222;border-radius:50%;box-shadow:0 4px #000,0 6px 10px #0003;transition:transform .1s,box-shadow .1s}.key.black.active:after,.key.black:active:after{transform:translateY(4px);box-shadow:0 2px #000,0 3px 5px #0003;background:#111}.key-label{font-size:10px;font-weight:600;color:#999;margin-bottom:15px;font-family:Inter,sans-serif;pointer-events:none}.key.black .key-label{position:absolute;top:10px;left:-50px;width:100px;text-align:center;color:#666}:root{font-family:Inter,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;color:#333;background-color:#e0e0e0}body{margin:0;display:flex;justify-content:center;place-items:center;min-width:320px;min-height:100vh;background:#d4d4d4}.app-container{width:100%;max-width:1200px;margin:0 auto;padding:2rem;display:flex;flex-direction:column;align-items:center}header{margin-bottom:2rem}header h1{font-size:1.5em;font-weight:600;color:#444;letter-spacing:-.02em;text-transform:uppercase;margin:0}footer{margin-top:2rem;color:#888;font-size:.8em}