:root{--primary-color: #6200ea;--primary-light: #9d46ff;--primary-gradient: linear-gradient(135deg, #6200ea 0%, #9d46ff 100%);--accent-color: #00e5ff;--bg-color: #f3f4f8;--surface-color: #ffffff;--text-main: #2d2d2d;--text-muted: #666666;--card-bg: rgba(255, 255, 255, .95);--card-border: rgba(255, 255, 255, .5);--dashed-border: #e0e7ff;--input-bg: #ffffff;--input-border: #e0e0e0;--list-hover: #f5f0ff;--badge-bg: #ffffff;--upload-icon-bg: #f3f0ff;--shadow-sm: 0 2px 8px rgba(98, 0, 234, .05);--shadow-md: 0 8px 24px rgba(98, 0, 234, .12);--shadow-float: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-lg: 16px;--radius-md: 12px;--radius-xl: 24px}[data-theme=dark]{--bg-color: #121212;--surface-color: #1e1e1e;--text-main: #e0e0e0;--text-muted: #a0a0a0;--card-bg: rgba(30, 30, 35, .85);--card-border: rgba(255, 255, 255, .1);--dashed-border: #333333;--input-bg: #2d2d2d;--input-border: #444444;--list-hover: rgba(157, 70, 255, .15);--badge-bg: #2d2d2d;--upload-icon-bg: rgba(98, 0, 234, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 8px 24px rgba(0, 0, 0, .3);--shadow-float: 0 20px 25px -5px rgba(0, 0, 0, .3)}body{margin:0;padding-top:60px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);min-height:100vh;box-sizing:border-box;transition:background-color .3s ease,color .3s ease}#file-input{display:none}body:before{content:"";position:fixed;top:0;left:0;right:0;height:50vh;background:linear-gradient(135deg,var(--primary-color),var(--primary-light));border-bottom-left-radius:50% 40px;border-bottom-right-radius:50% 40px;z-index:-1;box-shadow:0 4px 20px #0000001a}#file-area{display:flex;flex-direction:column;justify-content:center;align-items:center;width:90%;max-width:800px;height:320px;margin:0 auto 40px;background-color:var(--card-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:var(--radius-xl);box-shadow:var(--shadow-float);cursor:pointer;position:relative;transition:transform .3s cubic-bezier(.34,1.56,.64,1),background-color .3s ease;border:1px solid var(--card-border);overflow:hidden;padding:20px;box-sizing:border-box}#file-area:after{content:"";position:absolute;inset:15px;border:2px dashed var(--dashed-border);border-radius:16px;pointer-events:none;transition:border-color .3s ease}#file-area:hover{transform:translateY(-5px)}#file-area:hover:after{border-color:var(--primary-color)}#file-area .upload-icon{color:var(--primary-color);background:var(--upload-icon-bg);padding:16px;border-radius:50%;margin-bottom:16px;display:flex}#file-area h2{font-size:1.8rem;font-weight:700;margin:0 0 10px;color:var(--text-main);z-index:2;letter-spacing:-.5px}#file-area p{font-size:1.1rem;color:var(--text-muted);opacity:.9;margin:0;z-index:2}.browse-btn{margin-top:20px;background-color:var(--primary-color);color:#fff;border:0;padding:10px 24px;border-radius:50px;font-weight:600;box-shadow:0 4px 10px #0000001a;cursor:pointer;z-index:2}#file-area.has-file .upload-icon{background:#e6fffa;color:#00c853}[data-theme=dark] #file-area.has-file .upload-icon{background:#00c85333}#file-area.has-file h2{color:#00c853}#file-area.has-file p{font-family:Courier New,monospace;background-color:var(--bg-color);color:var(--text-main);padding:8px 16px;border-radius:8px;border:1px solid var(--dashed-border);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:70%;display:block}#side-panel{position:absolute;top:0;right:0;width:auto;padding:2em;box-sizing:border-box;pointer-events:none;z-index:10;display:flex;gap:10px;justify-content:flex-end}#side-panel button,.theme-toggle{font-size:.9rem;padding:10px 24px;border:1px solid rgba(255,255,255,.3);border-radius:50px;background-color:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font-weight:600;cursor:pointer;pointer-events:all;transition:all .2s ease;box-shadow:none;display:inline-flex;align-items:center;justify-content:center}#side-panel button:hover,.theme-toggle:hover{background-color:#fff;color:var(--primary-color);transform:translateY(-2px)}.theme-toggle{padding:10px 14px;font-size:1.2rem}#format-containers{display:flex;justify-content:center;gap:20px;max-width:1200px;margin:0 auto 100px;padding:0 20px;position:relative;z-index:2}.format-container{display:flex;flex-flow:column nowrap;align-items:center;flex:1;padding:0}.format-container h2{text-align:center;margin-bottom:20px;font-size:.9rem;text-transform:uppercase;letter-spacing:1.5px;font-weight:800;color:var(--text-muted);background:var(--badge-bg);padding:8px 24px;border-radius:50px;box-shadow:var(--shadow-sm)}#from-container,#to-container{background-color:transparent}.search{width:80%;text-align:left;margin-bottom:20px;padding:12px 20px;border:1px solid var(--input-border);border-radius:50px;outline:none;box-shadow:var(--shadow-sm);transition:all .2s;font-size:1rem;background-color:var(--input-bg);color:var(--text-main)}.search:focus{border-color:var(--primary-color);box-shadow:0 0 0 4px #6200ea1a}.format-list{display:flex;flex-flow:column nowrap;width:100%;box-sizing:border-box;align-items:center;background-color:var(--surface-color);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-md);min-height:400px;max-height:60vh;overflow-y:auto;border:1px solid var(--input-border)}.format-list::-webkit-scrollbar{width:6px}.format-list::-webkit-scrollbar-thumb{background:#ddd;border-radius:4px}[data-theme=dark] .format-list::-webkit-scrollbar-thumb{background:#444}.format-list button{width:100%;margin:4px 0;padding:12px 16px;color:var(--text-muted);background-color:transparent;border:1px solid transparent;border-radius:var(--radius-md);font-family:inherit;font-weight:500;text-align:left;cursor:pointer;transition:all .2s ease;display:flex;justify-content:space-between}.format-list button:hover{background-color:var(--list-hover);color:var(--primary-color);transform:translate(4px)}button.selected{background-color:var(--primary-color)!important;color:#fff!important;font-weight:600;box-shadow:0 4px 12px #6200ea4d}#convert-button{position:fixed;left:50%;bottom:30px;transform:translate(-50%);font-size:1.2rem;font-weight:700;padding:16px 48px;border:0;border-radius:50px;background:linear-gradient(90deg,var(--primary-color),var(--primary-light));color:#fff;cursor:pointer;box-shadow:0 10px 25px #6200ea66;transition:all .3s cubic-bezier(.175,.885,.32,1.275);z-index:100;letter-spacing:1px;text-transform:uppercase}#convert-button:hover{transform:translate(-50%) scale(1.05);box-shadow:0 15px 35px #6200ea80}#convert-button:active{transform:translate(-50%) scale(.95)}.disabled{opacity:.5;filter:grayscale(1);pointer-events:none}#popup-bg{position:fixed;left:0;top:0;width:100%;height:100%;background-color:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200}#popup{position:fixed;left:50%;top:50%;width:300px;transform:translate(-50%,-50%);background-color:var(--surface-color);padding:30px;border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-md);z-index:201;color:var(--text-main)}#popup button{margin-top:15px;font-size:1rem;padding:10px 24px;border:0;border-radius:8px;background-color:var(--primary-color);color:#fff;cursor:pointer;transition:opacity .2s}#popup button:hover{opacity:.9}@media only screen and (max-width:800px){#drop-hint-text{display:none}#format-containers{flex-flow:column nowrap;margin-top:20px;gap:40px}.format-container{width:100%;padding:0}.format-list{min-height:auto}#side-panel{width:100%;text-align:right;padding:1em}#convert-button{width:90%;bottom:20px}body:before{height:40vh}#file-area{height:250px}}