@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap";:root{--bg-color: #07080c;--panel-bg: rgba(13, 16, 23, .75);--panel-border: rgba(255, 255, 255, .08);--text-primary: #ffffff;--text-secondary: #8d95a5;--accent-gold: #feca57;--accent-pink: #ff5376;--accent-orange: #ff9f43;--accent-green: #2ecc71;--font-main: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", monospace;--gutter: 24px;--nav-zone: 84px;--panel-w: 440px;--player-h: 76px;--free-left: calc(var(--gutter) * 2 + var(--panel-w))}*{box-sizing:border-box;margin:0;padding:0;-webkit-user-select:none;user-select:none}body,html{width:100%;height:100%;overflow:hidden;background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-main);-webkit-font-smoothing:antialiased}#app-container{position:relative;width:100vw;height:100vh;display:flex;flex-direction:column;background:radial-gradient(circle at center,#0b0d14,#06070a)}#render-viewport{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}#canvas-2d{position:absolute;top:0;left:0;width:100%;height:100%}#viewport-3d{position:absolute;top:0;left:0;width:100%;height:100%;display:none}#harmonic-header{position:absolute;top:var(--nav-zone);left:var(--free-left);right:var(--gutter);text-align:center;z-index:10;pointer-events:none}.panel-collapsed #harmonic-header{left:var(--gutter)}.header-category{font-family:var(--font-main);font-size:13px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--accent-gold);margin-bottom:8px;text-shadow:0 0 12px rgba(254,202,87,.4)}.header-title{font-family:var(--font-main);font-size:44px;font-weight:800;letter-spacing:5px;color:#fff;text-shadow:0 0 20px rgba(255,255,255,.5),0 0 40px rgba(255,255,255,.2)}.header-notes-badge .line-break{flex-basis:100%;height:0}.header-notes-badge{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:8px;font-size:18px;font-weight:700;letter-spacing:2px}#top-nav{position:absolute;top:20px;right:var(--gutter);display:flex;gap:10px;z-index:20}.nav-btn .nav-ico{margin-right:6px}.nav-btn{background:#ffffff0f;border:1px solid var(--panel-border);color:var(--text-primary);padding:8px 16px;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.nav-btn:hover{background:#ffffff1f;border-color:#ffffff40;box-shadow:0 0 14px #ffffff26}.nav-btn.active{background:#feca572e;border-color:var(--accent-gold);color:var(--accent-gold);box-shadow:0 0 16px #feca5759}#controls-panel{position:absolute;bottom:var(--gutter);left:var(--gutter);width:var(--panel-w);max-height:calc(100vh - var(--nav-zone) - var(--gutter));overflow-y:auto;background:var(--panel-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--panel-border);border-radius:16px;padding:20px;z-index:20;box-shadow:0 12px 36px #0009;transition:transform .3s cubic-bezier(.16,1,.3,1),visibility 0s linear 0s}#controls-panel.collapsed{transform:translate(calc(-100% - var(--gutter) - 10px));visibility:hidden;transition:transform .3s cubic-bezier(.16,1,.3,1),visibility 0s linear .3s}#panel-toggle{position:absolute;bottom:24px;left:24px;z-index:21;display:none;background:var(--panel-bg);border:1px solid var(--panel-border);color:var(--text-primary);border-radius:50%;width:44px;height:44px;cursor:pointer;font-size:18px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}#controls-panel.collapsed~#panel-toggle{display:flex;align-items:center;justify-content:center}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,.06)}.panel-header h3{font-size:15px;font-weight:700;letter-spacing:1px;color:#fff}.close-panel-btn{background:none;border:none;color:var(--text-secondary);font-size:18px;cursor:pointer}.control-group{margin-bottom:18px}.control-label{display:flex;justify-content:space-between;font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}.control-val{color:var(--accent-gold);font-family:var(--font-mono);font-weight:700}input[type=range]{-webkit-appearance:none;width:100%;height:5px;background:#ffffff1a;border-radius:4px;outline:none;cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 0 10px #fffc,0 0 18px var(--accent-gold);cursor:pointer;transition:transform .1s ease}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}.presets-grid{display:flex;flex-wrap:wrap;gap:6px}.preset-chip{background:#ffffff0d;border:1px solid rgba(255,255,255,.08);color:#e0e0e0;padding:5px 10px;border-radius:8px;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s ease}.preset-chip:hover{background:#ffffff1f;border-color:#fff3}.preset-chip.active{background:#ff9f4333;border-color:var(--accent-orange);color:var(--accent-orange);box-shadow:0 0 10px #ff9f434d}.ratio-input-wrapper{display:flex;gap:8px}.ratio-input-wrapper input{flex:1;background:#0006;border:1px solid var(--panel-border);color:#fff;padding:7px 12px;border-radius:8px;font-family:var(--font-mono);font-size:13px;outline:none}.ratio-input-wrapper input:focus{border-color:var(--accent-gold);box-shadow:0 0 10px #feca574d}.ratio-input-wrapper input.invalid{border-color:var(--accent-pink);box-shadow:0 0 10px #ff53764d}.ratio-error{margin-top:6px;font-size:11px;color:var(--accent-pink)}#val-slowmo{text-transform:none}.control-sub{margin-left:6px;font-family:var(--font-mono);text-transform:none;letter-spacing:0;color:var(--text-secondary);font-weight:500}.ratio-input-wrapper button{background:#ffffff14;border:1px solid var(--panel-border);color:#fff;padding:0 14px;border-radius:8px;cursor:pointer;font-weight:600;font-size:12px}.info-content-box{background:#00000073;border:1px solid rgba(255,255,255,.07);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:8px}.info-freq-row{font-family:var(--font-mono);font-size:12px;font-weight:700;color:var(--accent-gold);letter-spacing:.5px}.info-explanation{font-size:12px;line-height:1.45;color:#d1d5db}.info-acoustic-status{font-size:11px;font-weight:600;padding:5px 8px;border-radius:6px;background:#ffffff0d;border-left:3px solid var(--accent-gold);color:#e5e7eb}.piano-container{display:flex;position:relative;height:64px;background:#000;padding:3px;border-radius:6px;border:1px solid rgba(255,255,255,.1);overflow:hidden;margin-top:6px}.piano-white-keys{display:flex;width:100%;height:100%}.piano-key-white{flex:1;background:#f0f0f0;border-right:1px solid #aaa;border-radius:0 0 3px 3px;cursor:pointer;transition:background .1s}.piano-key-white:last-child{border-right:none}.piano-key-white:hover{background:#fff}.piano-key-white.active{background:#ff9f43!important;box-shadow:inset 0 0 10px #0006,0 0 12px #ff9f43}.piano-black-keys{position:absolute;top:3px;left:3px;right:3px;height:60%;pointer-events:none;display:flex}.piano-black-slot{flex:1;position:relative}.piano-key-black{position:absolute;right:-25%;width:50%;height:100%;background:#151515;border:1px solid #333;border-radius:0 0 2px 2px;pointer-events:auto;cursor:pointer;z-index:2;transition:background .1s}.piano-key-black:hover{background:#252525}.piano-key-black.active{background:#ff5376!important;box-shadow:0 0 12px #ff5376}.btn-group{display:flex;gap:8px}.btn-toggle{flex:1;background:#ffffff0d;border:1px solid var(--panel-border);color:var(--text-secondary);padding:7px 10px;border-radius:8px;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s ease}.btn-toggle.active{background:#2ecc7126;border-color:var(--accent-green);color:var(--accent-green);box-shadow:0 0 10px #2ecc714d}#bottom-strip{position:absolute;bottom:var(--gutter);right:var(--gutter);display:flex;flex-direction:column;align-items:flex-end;gap:8px;z-index:20}.waveform-card{background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--panel-border);border-radius:12px;padding:10px 14px;display:flex;flex-direction:column;gap:4px}.waveform-label{font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--text-secondary)}#waveform-canvas{width:240px;height:48px}#intervals-grid-view{position:absolute;top:0;left:0;width:100%;height:100%;z-index:15;background:#08090c;overflow-y:auto;padding:var(--nav-zone) 60px 120px;display:none}.tab-matrix #bottom-strip{display:none}.grid-header{text-align:center;margin-bottom:36px}.grid-header .subtitle{font-size:14px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--text-secondary);margin-bottom:6px}.grid-header .main-title{font-size:48px;font-weight:800;letter-spacing:6px;color:#fff;text-shadow:0 0 24px rgba(255,255,255,.4)}.intervals-grid-container{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;max-width:1100px;margin:0 auto}.interval-card{background:#ffffff05;border:1px solid rgba(255,255,255,.05);border-radius:16px;padding:16px;display:flex;flex-direction:column;align-items:center;cursor:pointer;transition:all .25s cubic-bezier(.16,1,.3,1)}.interval-card:hover{background:#ffffff0d;border-color:#fff3;transform:translateY(-4px);box-shadow:0 10px 30px #00000080}.card-header{font-size:18px;font-weight:700;margin-bottom:12px;display:flex;gap:8px;align-items:center}.card-header .note-badge{font-weight:800}.card-header .ratio-text{color:#fff;letter-spacing:1px}.card-canvas{width:180px;max-width:100%;aspect-ratio:1}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:#0003}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.nav-btn.primary-glow{background:linear-gradient(135deg,#2ecc7133,#3498db40);border:1px solid rgba(46,204,113,.5);color:#a8ff78;box-shadow:0 0 15px #2ecc7140;font-weight:700}.nav-btn.primary-glow:hover{background:linear-gradient(135deg,#2ecc7159,#3498db66);border-color:#2ecc71;color:#fff;box-shadow:0 0 22px #2ecc7173}#media-player-bar{position:absolute;bottom:var(--gutter);left:var(--free-left);right:var(--gutter);margin:0 auto;max-width:840px;min-height:var(--player-h);background:#0d1018e0;border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-radius:14px;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;z-index:100;box-shadow:0 12px 40px #000000a6,0 0 20px #2ecc711a;transition:opacity .3s ease,transform .3s ease}#media-player-bar.hidden{opacity:0;pointer-events:none;transform:translateY(30px)}.panel-collapsed #media-player-bar,.tab-matrix #media-player-bar{left:calc(var(--gutter) * 2 + 44px)}.media-active #bottom-strip{bottom:calc(var(--gutter) + var(--player-h) + 12px)}.player-left{display:flex;align-items:center;gap:12px;min-width:170px;max-width:220px}.player-icon{font-size:26px;display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:#ffffff0d;border-radius:10px;border:1px solid rgba(255,255,255,.08)}.player-info{overflow:hidden;display:flex;flex-direction:column}.player-title{font-size:13px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.5px}.player-meta{font-size:11px;color:#8892b0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.player-center{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;max-width:400px}.player-controls{display:flex;align-items:center;gap:10px}.player-btn{background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:#fff;border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:13px;transition:all .2s ease}.player-btn:hover{background:#ffffff26;border-color:#ffffff4d;transform:scale(1.05)}.player-btn.player-btn-main{width:38px;height:38px;font-size:16px;background:#2ecc71;color:#0b0d14;font-weight:700;border:none;box-shadow:0 0 14px #2ecc7180}.player-btn.player-btn-main:hover{background:#a8ff78;box-shadow:0 0 20px #2ecc71b3;transform:scale(1.08)}.player-btn.active{color:#2ecc71;border-color:#2ecc7180;background:#2ecc7126}.player-speed-select{display:flex;align-items:center;background:#ffffff0a;border-radius:6px;padding:2px;border:1px solid rgba(255,255,255,.08);margin-left:6px}.speed-btn{background:none;border:none;color:#8892b0;font-size:10px;font-weight:600;padding:3px 6px;border-radius:4px;cursor:pointer;transition:all .15s ease}.speed-btn:hover{color:#fff}.speed-btn.active{background:#ffffff26;color:#fff}.player-timeline-wrapper{width:100%;display:flex;align-items:center;gap:10px}.player-time{font-family:var(--font-mono);font-size:11px;color:#8892b0;min-width:36px}.player-scrubber{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:4px;border-radius:2px;background:#ffffff26;outline:none;cursor:pointer;transition:background .2s ease}.player-scrubber::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:12px;height:12px;border-radius:50%;background:#2ecc71;box-shadow:0 0 8px #2ecc71;cursor:pointer;transition:transform .15s ease}.player-scrubber::-webkit-slider-thumb:hover{transform:scale(1.3)}.player-right{display:flex;align-items:center;gap:10px}.audio-mode-selector{display:flex;background:#ffffff0d;border-radius:6px;padding:2px;border:1px solid rgba(255,255,255,.08)}.mode-btn{background:none;border:none;color:#8892b0;font-size:10px;font-weight:600;padding:4px 8px;border-radius:4px;cursor:pointer;transition:all .15s ease}.mode-btn:hover{color:#fff}.mode-btn.active{background:#2ecc7140;color:#a8ff78;border:1px solid rgba(46,204,113,.4)}.player-btn-close{background:none;border:none;color:#8892b0;font-size:14px}.player-btn-close:hover{color:#ff5376;background:#ff537626}#drop-overlay{position:absolute;top:0;left:0;width:100vw;height:100vh;background:#07080cd9;backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);z-index:9999;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .25s ease}#drop-overlay.drag-active{opacity:1;pointer-events:auto}.drop-content{border:2px dashed rgba(46,204,113,.6);border-radius:20px;padding:60px 80px;text-align:center;background:#2ecc710d;box-shadow:0 0 50px #2ecc7133}.drop-icon{font-size:54px;margin-bottom:16px;animation:pulseDrop 1.5s infinite}@keyframes pulseDrop{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}.drop-content h2{font-size:24px;font-weight:700;color:#fff;margin-bottom:8px}.drop-content p{font-size:13px;color:#8892b0}@media(max-width:1280px){:root{--gutter: 20px;--nav-zone: 72px;--panel-w: 380px}#top-nav{top:16px;gap:6px}.nav-btn{padding:7px 12px;font-size:12px}.nav-btn .nav-ico{margin-right:4px}.header-title{font-size:38px}.header-notes-badge{font-size:16px}#controls-panel{padding:16px}#intervals-grid-view{padding-left:40px;padding-right:40px}.intervals-grid-container{gap:20px}}@media(max-width:1024px){.nav-btn .nav-label{display:none}.nav-btn .nav-ico{margin-right:0}.nav-btn{padding:7px 11px;font-size:15px}.intervals-grid-container{grid-template-columns:repeat(3,1fr)}}@media(max-width:768px){:root{--gutter: 8px;--nav-zone: 56px;--sheet-h: 46vh;--player-h: 112px}#top-nav{top:8px;left:var(--gutter);right:var(--gutter);justify-content:space-between;gap:4px}.nav-btn{flex:1 1 0;min-width:0;padding:7px 0;font-size:16px;border-radius:12px}#harmonic-header,.panel-collapsed #harmonic-header{left:var(--gutter);right:var(--gutter)}.header-category{font-size:11px;letter-spacing:2px;margin-bottom:4px}.header-title{font-size:28px;letter-spacing:3px}.header-notes-badge{font-size:13px;gap:6px;letter-spacing:1px;margin-top:4px}.header-notes-badge small{font-size:11px!important}#controls-panel{left:0;right:0;bottom:0;width:auto;height:var(--sheet-h);max-height:none;border-radius:16px 16px 0 0;border-bottom:none;padding:12px 16px 16px}#controls-panel.collapsed{transform:translateY(100%)}#panel-toggle{left:auto;right:12px;bottom:12px}.media-active #panel-toggle{bottom:calc(var(--player-h) + 20px)}#bottom-strip{display:none}#media-player-bar,.panel-collapsed #media-player-bar,.tab-matrix #media-player-bar{left:var(--gutter);right:var(--gutter);bottom:calc(var(--sheet-h) + var(--gutter));max-width:none;flex-wrap:wrap;gap:8px 10px;padding:10px 12px}.panel-collapsed #media-player-bar,.tab-matrix #media-player-bar{bottom:var(--gutter)}.player-left{flex:1 1 0;min-width:0;max-width:none}.player-icon{display:none}.player-right{gap:6px}.mode-btn{padding:4px 6px}.player-center{order:3;flex:1 1 100%;max-width:none}#intervals-grid-view{padding:var(--nav-zone) 12px 140px}.grid-header{margin-bottom:20px}.grid-header .subtitle{font-size:11px;letter-spacing:3px}.grid-header .main-title{font-size:30px;letter-spacing:4px}.intervals-grid-container{grid-template-columns:repeat(2,1fr);gap:12px}.interval-card{padding:10px}.card-canvas{width:100%}.drop-content{margin:16px;padding:32px 20px}}.nav-btn.suggested{border-color:#a8ff78b3;color:#a8ff78;animation:tunnelPulse 1.8s ease-in-out infinite}@keyframes tunnelPulse{0%,to{box-shadow:0 0 6px #a8ff7840}50%{box-shadow:0 0 18px #a8ff7899}}.midi-device{width:100%;margin-top:8px;background:#0006;border:1px solid var(--panel-border);color:#fff;border-radius:8px;padding:6px 10px;font-family:var(--font-main);font-size:12px}.midi-status{margin-top:6px;font-size:11px;color:var(--accent-green)}.midi-status.error{color:var(--accent-pink)}#btn-midi-keyboard:disabled{opacity:.45;cursor:not-allowed}