:root{--bg-color: #f0f0f3;--text-color: #1d1d1f;--accent-color: #e63946;--glass-bg: rgba(255, 255, 255, .45);--glass-border: rgba(255, 255, 255, .5);--shadow: 0 8px 32px 0 rgba(0, 0, 0, .08)}[data-theme=dark]{--bg-color: #0c0c0e;--text-color: #f5f5f7;--glass-bg: rgba(28, 28, 30, .6);--glass-border: rgba(255, 255, 255, .08);--shadow: 0 8px 32px 0 rgba(0, 0, 0, .37)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:Inter,-apple-system,system-ui,sans-serif;background:var(--bg-color);color:var(--text-color);margin:0;display:flex;flex-direction:column;height:100vh;align-items:center;transition:background .3s,color .3s;overflow:hidden}body.allow-scroll{height:auto;overflow:auto}.header-container{width:100%;max-width:800px;padding:20px;display:flex;align-items:center;justify-content:space-between;transition:all .3s;z-index:100}.home-header{justify-content:center;flex-direction:column;text-align:center;margin-top:30px;gap:10px}.home-logo{width:60px;height:auto;margin-bottom:-5px}.home-header header h1{font-size:2.2rem;font-weight:800;margin:0;letter-spacing:-2px;line-height:1;color:var(--accent-color)}.home-header header p{font-size:1rem;opacity:.6;margin:5px 0 0}.tool-header{background:var(--glass-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--glass-border);max-width:100%;padding:12px 20px;top:0;position:sticky}.tool-nav-wrapper{display:flex;align-items:baseline;gap:15px}.brand-link{font-size:1.4rem;font-weight:800;text-decoration:none;color:var(--accent-color);letter-spacing:-1px}.tool-name-label{font-weight:600;font-size:.9rem;opacity:.5;text-transform:uppercase;letter-spacing:1px;padding-left:15px;border-left:1px solid var(--glass-border)}.theme-btn-header{background:var(--glass-bg);border:1px solid var(--glass-border);cursor:pointer;padding:8px;border-radius:50%;color:var(--text-color);display:flex;align-items:center;justify-content:center}[data-theme=dark] .icon-sun{display:block}[data-theme=dark] .icon-moon,.icon-sun{display:none}.icon-moon{display:block}.theme-btn-header svg{width:20px;height:20px}.glass{background:var(--glass-bg);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);border:1px solid var(--glass-border);border-radius:20px;box-shadow:var(--shadow)}.menu-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;padding:15px;max-width:500px;width:100%;flex:1;align-content:center;margin:0 auto}.menu-item{text-decoration:none;color:inherit;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:12px;transition:transform .2s,background .3s;min-height:0;width:100%}.menu-item:hover{transform:translateY(-5px);background:var(--glass-bg)}.menu-item .icon{width:32px;height:32px;margin-bottom:8px;stroke:var(--accent-color)}.menu-item span{font-weight:700;font-size:.8rem;text-align:center}.menu-item:last-child{grid-column:span 2;aspect-ratio:auto;min-height:50px;padding:8px 15px;flex-direction:row;gap:12px;justify-content:center}.menu-item:last-child .icon{margin-bottom:0;width:24px;height:24px}.tuner-container,.metronome-container,.tanpura-container,.instructions-content{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;max-width:600px;padding:10px 20px;flex:1;min-height:0}.tanpura-container{padding:10px 20px;gap:10px}.action-btn{margin-top:15px;padding:12px 40px;font-weight:800;font-size:1rem;cursor:pointer;border:1px solid var(--glass-border);color:var(--text-color);background:var(--glass-bg);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);transition:all .2s;border-radius:50px;width:fit-content;min-width:160px;text-align:center}.action-btn:hover{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.action-btn:active{transform:scale(.95)}.metronome-controls{display:flex;align-items:center;gap:20px;padding:15px;margin-top:25px;width:95%;max-width:450px;border-radius:50px}.btn-round{width:48px;height:48px;border-radius:50%;border:1px solid var(--glass-border);background:var(--glass-bg);color:var(--text-color);font-size:1.8rem;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:0;padding-bottom:4px;transition:all .2s;user-select:none;-webkit-user-select:none;touch-action:manipulation}.btn-round:hover{background:var(--accent-color);color:#fff}#bpm-slider{flex:1;appearance:none;-webkit-appearance:none;background:transparent;cursor:pointer}#bpm-slider::-webkit-slider-runnable-track{width:100%;height:6px;background:var(--glass-border);border-radius:3px}#bpm-slider::-webkit-slider-thumb{-webkit-appearance:none;height:22px;width:22px;border-radius:50%;background:var(--accent-color);margin-top:-8px;box-shadow:0 0 12px #ff4d4d4d}.tanpura-controls{margin-top:0;padding:15px;width:95%;max-width:480px;display:flex;flex-direction:column;align-items:center;gap:20px}.label-heading{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;opacity:.5}.preset-group,.mode-group{display:flex;gap:8px;flex-wrap:nowrap;justify-content:center;width:100%}.preset-btn,.mode-btn{padding:10px 12px;flex:1;min-width:0;border-radius:12px;border:1px solid var(--glass-border);background:var(--glass-bg);color:var(--text-color);font-weight:700;cursor:pointer;transition:all .2s;font-size:.75rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.preset-btn:hover,.mode-btn:hover{border-color:var(--accent-color);color:var(--accent-color)}.preset-btn.active,.mode-btn.active{background:var(--accent-color);color:#fff;border-color:var(--accent-color);box-shadow:0 0 15px #ff4d4d4d}.meter-wrapper,.visualizer-wrapper{position:relative;width:300px;height:300px;display:flex;justify-content:center;align-items:center;margin-bottom:20px}.central-circle{position:absolute;bottom:0;left:50%;transform:translate(-50%);width:140px;height:140px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:10;pointer-events:none}.note-display{margin-top:-40px;padding:10px 30px;border-radius:100px;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:10}.frequency-display{padding:10px 30px;border-radius:15px;display:flex;align-items:center;justify-content:center}.frequency-display span{margin:0 2px}#current-swar,#current-note{font-size:3.2rem;font-weight:800;color:var(--accent-color);line-height:1}.current-note{font-size:3.2rem;font-weight:800;color:var(--accent-color)}.hint{font-size:.8em;margin:2em 0 0}#detailed-info{display:flex;flex-direction:column;align-items:center;margin-top:20px;gap:2px}#frequency-display{font-weight:700;font-size:1rem}#cents-display{opacity:.5;font-size:.8rem}.arc-meter{width:300px;height:150px;background:var(--glass-border);border-radius:150px 150px 0 0;position:relative;border:1px solid var(--glass-border);overflow:hidden;z-index:1}.needle{position:absolute;bottom:0;left:50%;width:2px;height:130px;background:var(--accent-color);transform-origin:bottom center;transition:transform .1s ease-out;z-index:2}.beat-visualizer{width:100px;height:100px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:20px}.dot{width:30px;height:30px;background:var(--accent-color);border-radius:50%}.dot.flash{transform:scale(1.75);background:#fff;box-shadow:0 0 50px #fff}.drone-visualizer-strings{width:220px;height:100px;display:flex;justify-content:space-around;z-index:1;margin-bottom:5px}.drone-string{width:2px;height:100%;background:var(--glass-border);border-radius:4px}.drone-string.vibrating{animation:vibrate-string .1s infinite alternate;background:var(--accent-color);box-shadow:0 0 10px var(--accent-color)}@keyframes vibrate-string{0%{transform:scaleX(1);opacity:1}to{transform:scaleX(4);opacity:.4}}.frequency-display{padding:8px 24px;border-radius:50px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;color:var(--accent-color)}@media(max-width:500px){.menu-grid{gap:10px;padding:10px}.home-header header h1{font-size:2rem}.action-btn{min-width:150px;padding:10px 32px}}.footer{padding:5px;font-size:.7rem;opacity:.3;text-align:center;width:100%}.home-theme-toggle{margin:10px auto 15%;width:44px;height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:50%;background:var(--glass-bg);border:1px solid var(--glass-border);color:var(--text-color)}.home-theme-toggle svg{width:22px;height:22px}