:root{--panel-bg: rgba(255, 255, 255, .25);--text-color: #ffffff;--primary-color: #ffffff;--primary-light: rgba(255, 255, 255, .3);--shadow-color: rgba(0, 0, 0, .2);--border-color: rgba(255, 255, 255, .6);--slider-track: rgba(255, 255, 255, .3);--slider-thumb: #ffffff;--button-hover: #ffffff;--button-hover-text: #333;--gradient-angle: 120deg;--gradient-color-1: #215b69;--gradient-color-2: #37668d;--gradient-color-3: #704a8f;--gradient-color-4: #444070;--gradient-speed: 20s}@keyframes gradientAnimation{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse-loader-anim{0%{transform:translate(-50%,-50%) scale(.7);opacity:.8}to{transform:translate(-50%,-50%) scale(1.5);opacity:0}}body{font-family:Inter,sans-serif;background:linear-gradient(var(--gradient-angle),var(--gradient-color-1),var(--gradient-color-2),var(--gradient-color-3),var(--gradient-color-4));background-size:400% 400%;animation:gradientAnimation var(--gradient-speed) ease infinite;color:var(--text-color);margin:0;padding:1rem;transition:background-color .3s,color .3s;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;display:flex;flex-direction:column;box-sizing:border-box;position:relative}#visual-effects-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0;overflow:hidden}header,.app-description,#sound-selection-bar,#mixer-board,footer{position:relative;z-index:1}@keyframes floatUp{0%{transform:translateY(0) scale(var(--scale-start));opacity:0}10%{opacity:var(--opacity-max)}90%{opacity:var(--opacity-max)}to{transform:translateY(-120vh) scale(var(--scale-end));opacity:0}}.effect-shape-circle{position:absolute;border-radius:50%;background:#ffffff40;-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px);bottom:-10vh;animation:floatUp linear infinite}@keyframes expandFade{0%{transform:scale(0);opacity:var(--opacity-start);border-width:1px}50%{opacity:var(--opacity-max);border-width:var(--border-width-mid)}to{transform:scale(var(--scale-max));opacity:0;border-width:0}}.effect-shape-ring{position:absolute;border-radius:50%;border:2px solid rgba(255,255,255,.3);box-shadow:0 0 10px #ffffff1a;transform:translate(-50%,-50%);animation:expandFade linear infinite;background:transparent}.effect-shape-ripple{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.1);background:radial-gradient(circle,#ffffff0d,#fff0 70%);transform:translate(-50%,-50%);animation:expandFade linear infinite}@keyframes glowPulse{0%,to{opacity:var(--opacity-min);transform:scaleY(1)}50%{opacity:var(--opacity-max);transform:scaleY(1.2)}}.effect-shape-bar{position:absolute;bottom:0;background:linear-gradient(to top,#fff0,#ffffff40,#fff0);transform-origin:bottom center;animation:glowPulse 5s ease-in-out infinite}@keyframes floatDust{0%{transform:translate(0);opacity:0}20%{opacity:var(--opacity)}80%{opacity:var(--opacity)}to{transform:translate(var(--move-x),var(--move-y));opacity:0}}.effect-dust{position:absolute;background:#fffc;border-radius:50%;box-shadow:0 0 3px #ffffff80;animation:floatDust linear infinite}@keyframes moveFirefly{0%{transform:translate(0)}to{transform:translate(var(--move-x),var(--move-y))}}@keyframes flashFirefly{0%,to{opacity:.2;transform:scale(.8)}50%{opacity:.9;transform:scale(1.2)}}.effect-firefly{position:absolute;background:#ffecb3;border-radius:50%;box-shadow:0 0 6px #ffecb3,0 0 12px #ffe082;animation:moveFirefly ease-in-out infinite alternate,flashFirefly ease-in-out infinite}@keyframes fallSnow{0%{transform:translateY(0) translate(0);opacity:0}10%{opacity:var(--opacity)}90%{opacity:var(--opacity)}to{transform:translateY(105vh) translate(var(--sway));opacity:0}}.effect-snow{position:absolute;top:-2vh;background:#ffffffe6;border-radius:50%;filter:blur(1px);animation:fallSnow linear infinite}header{display:flex;justify-content:space-between;align-items:center;max-width:1400px;margin:0 auto 2rem;padding:0 1rem;width:100%;box-sizing:border-box}header h1{font-size:2rem;font-weight:700;margin:0;text-shadow:0 2px 4px var(--shadow-color)}header div{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:flex-end}#toggle-all,#clear-all,#settings-toggle,#save-preset,#load-preset,#generate-mix,#about-toggle,#how-to-use-toggle,#about-app-toggle{background-color:var(--panel-bg);color:var(--primary-color);border:1px solid var(--border-color);padding:.5rem 1rem;border-radius:8px;cursor:pointer;font-weight:500;transition:background-color .2s,color .2s;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}#toggle-all:hover,#clear-all:hover,#settings-toggle:hover,#save-preset:hover,#load-preset:hover,#generate-mix:hover,#about-toggle:hover,#how-to-use-toggle:hover,#about-app-toggle:hover{background-color:var(--button-hover);color:var(--button-hover-text)}.app-description{text-align:center;max-width:700px;margin:-1rem auto 2rem;padding:0 1rem;font-size:1.3rem;font-weight:500;line-height:1.6;text-shadow:0 1px 3px var(--shadow-color)}#sound-selection-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;max-width:1400px;margin:0 auto 2.5rem;padding:0 1rem}#sound-selection-bar button{background-color:#283241b3;color:var(--primary-color);border:1px solid rgba(255,255,255,.5);padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;font-weight:500;transition:background-color .2s,color .2s,transform .1s;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);font-size:1rem;box-shadow:0 2px 5px #0000001a}#sound-selection-bar button:hover{background-color:var(--button-hover);color:var(--button-hover-text);transform:translateY(-2px)}#sound-selection-bar button.category-btn-nature{background-color:#2e7d3bb3;border-color:#2e7d3b}#sound-selection-bar button.category-btn-nature:hover{background-color:#2e7d3b;color:#fff}#sound-selection-bar button.category-btn-animals{background-color:#b0a11ab3;border-color:#b0a11a}#sound-selection-bar button.category-btn-animals:hover{background-color:#b0a11a;color:#fff}#sound-selection-bar button.category-btn-music{background-color:#6b4899b3;border-color:#6b4899}#sound-selection-bar button.category-btn-music:hover{background-color:#6b4899;color:#fff}#sound-selection-bar button.category-btn-instrument{background-color:#ad8a39b3;border-color:#ad8a39}#sound-selection-bar button.category-btn-instrument:hover{background-color:#ad8a39;color:#fff}#sound-selection-bar button.category-btn-noise{background-color:#747875b3;border-color:#747875}#sound-selection-bar button.category-btn-noise:hover{background-color:#747875;color:#fff}#sound-selection-bar button.category-btn-upload{background-color:#4169e1b3;border-color:#4169e1}#sound-selection-bar button.category-btn-upload:hover{background-color:#4169e1;color:#fff}#mixer-board{display:flex;flex-direction:column;align-items:center;gap:1.25rem;max-width:800px;margin:0 auto;padding:1rem;width:100%;box-sizing:border-box}.active-sound-strip{display:flex;align-items:center;justify-content:space-between;gap:1rem;width:100%;background-color:var(--panel-bg);border-radius:16px;padding:1rem 1.5rem;box-shadow:0 4px 12px var(--shadow-color);border:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:box-shadow .3s,border-color .3s;position:relative;box-sizing:border-box}.active-sound-strip.playing{border-color:var(--primary-color);box-shadow:0 6px 20px #fff6;background-color:#ffffff59}.sound-info{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-width:80px;max-width:120px}.sound-icon{width:64px;height:64px;color:var(--text-color);flex-shrink:0;margin-bottom:.5rem;overflow:hidden}.sound-icon svg{width:100%;height:100%;display:block;object-fit:contain}.sound-name{font-size:.9rem;font-weight:500;opacity:.9;line-height:1.2}.sound-controls{display:flex;align-items:center;gap:1rem;flex-grow:1}.remove-sound{background:none;border:none;color:var(--primary-light);cursor:pointer;padding:.5rem;display:flex;align-items:center;justify-content:center;transition:color .2s;flex-shrink:0}.remove-sound:hover{color:var(--primary-color)}.remove-sound svg{width:24px;height:24px}.play-toggle{position:relative;flex-shrink:0;width:48px;height:48px;border-radius:50%;border:none;background-color:var(--primary-light);color:var(--primary-color);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .2s,color .2s}.play-toggle:hover{background-color:var(--primary-color);color:var(--button-hover-text)}.play-toggle:disabled{cursor:not-allowed;background-color:#0003;color:#95a5a6}.play-toggle svg{width:24px;height:24px;transition:opacity .2s}.play-icon{display:block}.pause-icon,.play-toggle.playing .play-icon{display:none}.play-toggle.playing .pause-icon{display:block}.play-toggle.playing{background-color:var(--primary-color);color:var(--button-hover-text)}.play-toggle .loader{position:absolute;top:50%;left:50%;width:24px;height:24px;border-radius:50%;background-color:var(--primary-color);animation:pulse-loader-anim 1.2s ease-out infinite;display:none;border:none}.play-toggle.loading .play-icon,.play-toggle.loading .pause-icon{opacity:0}.play-toggle.loading .loader{display:block}.slider-container{height:auto;display:flex;justify-content:center;align-items:center;flex-grow:1;width:100%}.volume-slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:8px;background-color:transparent;cursor:pointer;outline:none}.volume-slider::-webkit-slider-runnable-track{height:8px;background:var(--slider-track);border-radius:4px}.volume-slider::-moz-range-track{height:8px;background:var(--slider-track);border-radius:4px}.volume-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;margin-top:-6px;width:20px;height:20px;background:var(--slider-thumb);border-radius:50%;box-shadow:0 1px 3px #0000004d}.volume-slider::-moz-range-thumb{width:20px;height:20px;background:var(--slider-thumb);border-radius:50%;border:none;box-shadow:0 1px 3px #0000004d}#settings-panel,#generate-panel,#how-to-use-panel,#about-app-panel,#terms-panel,#sound-selection-panel{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(1);background-color:#000000b3;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);border:1px solid var(--border-color);border-radius:16px;padding:1.5rem 2rem;z-index:100;max-height:80vh;box-shadow:0 8px 32px #0000005e;transition:transform .3s ease,opacity .3s ease;opacity:1;display:flex;flex-direction:column}#settings-panel,#generate-panel{width:320px}#sound-selection-panel{width:400px;max-width:90vw;z-index:101}#settings-panel.hidden,#generate-panel.hidden,#how-to-use-panel.hidden,#about-app-panel.hidden,#terms-panel.hidden,#sound-selection-panel.hidden{transform:translate(-50%,-50%) scale(.9);opacity:0;pointer-events:none}#settings-panel h2,#generate-panel h2,#how-to-use-panel h2,#about-app-panel h2,#terms-panel h2,#sound-selection-panel h2{margin:0 0 1rem;text-align:center}#generate-panel p{text-align:center;font-size:.9rem;opacity:.8;margin:-.5rem 0 1rem}.close-button{position:absolute;top:10px;right:15px;background:none;border:none;color:var(--text-color);font-size:2rem;line-height:1;cursor:pointer;opacity:.7;transition:opacity .2s}.close-button:hover{opacity:1}.setting{margin-bottom:1rem}.setting label{display:block;margin-bottom:.5rem;font-size:.85rem;opacity:.9}.setting input[type=range]{width:100%}.setting select{width:100%;padding:.5rem;border-radius:8px;border:1px solid var(--border-color);background-color:#0003;color:var(--text-color);font-size:1rem;font-family:Inter,sans-serif;cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right .7rem center;background-size:1em}.setting select:focus{outline:none;border-color:var(--primary-color);background-color:#0006}.setting option{background-color:#333;color:#fff}.setting.colors{display:flex;justify-content:space-between;align-items:center}.setting.colors label{margin-bottom:0}.setting input[type=color]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:40px;height:40px;background-color:transparent;border:none;cursor:pointer}.setting input[type=color]::-webkit-color-swatch{border-radius:50%;border:2px solid var(--border-color)}.setting input[type=color]::-moz-color-swatch{border-radius:50%;border:2px solid var(--border-color)}#how-to-use-panel,#about-app-panel,#terms-panel{width:500px;max-width:90vw}.about-content{overflow-y:auto;padding-right:1rem}.about-content h3{margin-top:1.5rem;margin-bottom:.5rem;font-weight:500}.about-content h3:first-child{margin-top:0}.about-content ul{padding-left:20px;list-style-type:disc;line-height:1.6}.about-content li{margin-bottom:.75rem}.about-content p{line-height:1.6}#sound-list{overflow-y:auto;display:flex;flex-direction:column;gap:.75rem}#sound-list button{width:100%;text-align:left;background-color:var(--primary-light);border:1px solid transparent;color:var(--text-color);padding:.75rem 1rem;border-radius:8px;cursor:pointer;font-size:1rem;transition:background-color .2s,border-color .2s}#sound-list button:hover{background-color:#ffffff80;border-color:var(--border-color)}#sound-list button:disabled{opacity:.5;cursor:not-allowed;background-color:#0003}#generate-prompt{width:100%;box-sizing:border-box;padding:.75rem;border-radius:8px;border:1px solid var(--border-color);background-color:#0003;color:var(--text-color);font-family:Inter,sans-serif;font-size:1rem;resize:vertical}#generate-prompt:focus{outline:none;border-color:var(--primary-color)}#generate-button{width:100%;padding:.75rem 1rem;border-radius:8px;border:none;background-color:var(--primary-color);color:var(--button-hover-text);font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s,opacity .2s;display:flex;justify-content:center;align-items:center;height:48px}#generate-button:hover{opacity:.9}#generate-button:disabled{opacity:.6;cursor:not-allowed}.loader{width:20px;height:20px;border:3px solid rgba(0,0,0,.2);border-top-color:var(--button-hover-text);border-radius:50%;animation:spin 1s ease-in-out infinite}.hidden{display:none!important}footer{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;color:#ffffffe6;font-size:.9rem;max-width:1400px;margin:2rem auto 0;margin-top:auto;width:100%;box-sizing:border-box;flex-wrap:wrap;gap:1rem}.footer-left{display:flex;gap:1rem;align-items:center}.footer-right{display:flex;gap:.5rem;align-items:center}footer p{margin:0}footer button{background:none;border:none;color:var(--text-color);text-decoration:underline;cursor:pointer;font-size:.9rem;padding:0;opacity:.9;font-family:Inter,sans-serif}.footer-left button{background-color:var(--panel-bg);padding:.5rem 1rem;border-radius:8px;text-decoration:none;border:1px solid var(--border-color)}.footer-left button:hover{background-color:var(--button-hover);color:var(--button-hover-text);opacity:1}footer button:hover{opacity:1}.separator{opacity:.5}footer a{color:#ffffffe6;text-decoration:none;transition:color .2s}footer a.copyright-link{color:#fff;opacity:1}footer a:hover,footer a.copyright-link:hover{color:#a5d8ff}@media(max-width:680px){body{padding:.5rem}header{flex-direction:column;gap:1rem;text-align:center;margin-bottom:1.5rem}header div{justify-content:center}#mixer-board{gap:1rem;padding:.5rem}footer{flex-direction:column;text-align:center;gap:1.5rem}.footer-left,.footer-right{justify-content:center;width:100%}.footer-left{flex-direction:column;gap:.75rem}.active-sound-strip{flex-wrap:wrap;justify-content:center}.sound-info{width:100%;max-width:none;flex-direction:row;gap:1rem;margin-bottom:.5rem;text-align:left}.sound-info{flex-direction:column;margin-bottom:0;width:auto}.sound-controls{width:100%;justify-content:space-between}}