:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{box-sizing:border-box}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg-color: #121212;--text-primary: #ffffff;--text-secondary: #aaaaaa;--accent-color: #00d4ff;--success-color: #00ff9d;--warning-color: #ff5e5e;--card-bg: #1e1e1e;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:var(--text-primary);background-color:var(--bg-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;justify-content:center}#root{width:100%;max-width:1280px;margin:0 auto;text-align:center}.tuner-container{display:flex;flex-direction:column;align-items:center;gap:2rem;padding:2rem;width:100%;max-width:500px;margin:auto}header h1{font-size:3.5rem;margin:0;letter-spacing:-2px;background:linear-gradient(135deg,var(--accent-color),#ffffff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}header p{margin:.5rem 0;color:var(--text-secondary);font-size:1.2rem}.display-area{background:var(--card-bg);border-radius:20px;padding:2rem;width:100%;box-shadow:0 4px 30px #00000080;transition:box-shadow .3s ease}.note-display{font-size:8rem;font-weight:900;line-height:1;transition:color .1s ease}.note-display.neutral{color:var(--text-secondary)}.note-display.in-tune{color:var(--success-color);text-shadow:0 0 30px rgba(0,255,157,.3)}.note-display.out-of-tune{color:var(--warning-color)}.frequency-display{font-size:1.5rem;color:var(--text-secondary);font-family:monospace;margin-top:1rem}.meter-container-gauge{background:var(--card-bg);border-radius:20px 20px 10px 10px;padding:1rem;width:100%;max-width:300px;margin:0 auto;box-shadow:inset 0 0 20px #00000080;display:flex;justify-content:center}.gauge-svg{width:100%;height:auto;display:block;overflow:visible}.gauge-svg text{font-family:monospace;font-weight:700}.gauge-svg .needle{transition:transform .1s cubic-bezier(.1,.7,1,.1)}.start-btn{background-color:var(--card-bg);color:var(--text-primary);border:1px solid var(--text-secondary);padding:1rem 3rem;font-size:1.5rem;border-radius:50px;cursor:pointer;transition:all .2s;text-transform:uppercase;font-weight:600;letter-spacing:1px}.start-btn:hover{background-color:var(--text-primary);color:var(--bg-color);border-color:var(--text-primary);box-shadow:0 0 20px #ffffff4d}.start-btn.active{border-color:var(--warning-color);color:var(--warning-color);background:transparent}.start-btn.active:hover{background:var(--warning-color);color:#fff}footer{color:var(--text-secondary);font-size:.8rem;margin-top:auto}@media(max-width:400px){header h1{font-size:2.5rem}.note-display{font-size:6rem}}