:root{--primary-color:#6C5CE7;--secondary-color:#a29bfe;--background-color:#f8f9fa;--text-color:#2d3436;--border-color:#dfe6e9;--success-color:#00b894;--error-color:#d63031}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,'Open Sans','Helvetica Neue',sans-serif;background-color:#fff;color:var(--text-color);line-height:1.6}.container{max-width:600px;margin:0 auto;padding:20px}.header{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:32px;padding-top:20px}.logo img{width:32px;height:32px}.header h1{font-size:24px;font-weight:600;color:var(--primary-color)}.upload-section{margin-bottom:32px}.upload-area{border:1px dashed #6c5ce780;border-radius:12px;padding:32px;text-align:center;background-color:#6c5ce710;transition:border-color .3s ease}.upload-area.drag-over{border-color:var(--primary-color);background-color:rgba(108,92,231,.05)}.upload-icon{margin-bottom:16px}.upload-area p{color:var(--primary-color);margin-bottom:16px}.upload-button{background-color:var(--primary-color);color:#fff;border:none;padding:12px 24px;border-radius:8px;font-size:16px;cursor:pointer;transition:background-color .3s ease}.upload-button:hover{background-color:var(--secondary-color)}.files-section{background-color:#fff;border-radius:12px;border:1px solid #00000010;padding:20px;margin-bottom:24px}.files-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.files-header h2{font-size:18px;font-weight:600}.delete-all,.download-all{background:0 0;border:none;color:var(--error-color);cursor:pointer;font-size:14px;display:flex;align-items:center;gap:8px}.delete-all:disabled,.download-all:disabled{opacity:.5;cursor:not-allowed}.delete-all img,.download-all img{width:16px;height:16px;opacity:.8;transition:opacity .3s ease}.delete-all:hover img,.download-all:hover img{opacity:1}.download-all{color:var(--primary-color)}.files-list{display:flex;flex-direction:column;gap:12px}.file-item{display:flex;align-items:center;padding:12px;border:1px solid var(--border-color);border-radius:8px;background-color:#fff;box-shadow:0 2px 4px rgba(0,0,0,.1)}.file-play{width:32px;height:32px;border-radius:50%;background-color:var(--background-color);display:flex;align-items:center;justify-content:center;margin-right:12px;cursor:pointer;border:none;transition:background-color .3s ease}.file-play:hover{background-color:var(--border-color)}.file-play img{width:16px;height:16px;opacity:.8;transition:opacity .3s ease}.file-play:hover img{opacity:1}.file-info{flex-grow:1;min-width:0}.file-name{font-weight:500;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;position:relative}.file-name:hover::after{content:attr(title);position:absolute;left:0;top:-30px;background:var(--text-color);color:#fff;padding:4px 8px;border-radius:4px;font-size:12px;white-space:nowrap;z-index:1000}.file-meta{display:flex;gap:8px}.meta-tag{background-color:var(--background-color);padding:2px 8px;border-radius:12px;font-size:12px;color:#636e72}.file-delete,.file-download{background:0 0;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:8px;border-radius:4px;transition:background-color .3s ease}.file-delete{color:var(--error-color)}.file-download{color:var(--primary-color);text-decoration:none}.file-delete img,.file-download img{width:16px;height:16px;opacity:.8;transition:opacity .3s ease}.file-delete:hover,.file-download:hover{background-color:var(--background-color)}.file-delete:hover img,.file-download:hover img{opacity:1}.converter-status{text-align:center;margin-bottom:24px;position:relative;min-height:80px;background-color:#fff;border-radius:12px;border:1px solid #00000010;padding:20px}.converter-loading{position:absolute;top:0;left:0;width:100%;height:100%;background-color:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;border-radius:12px;gap:12px}.converter-loading.hidden{display:none}.loading-spinner{width:32px;height:32px;border:3px solid var(--background-color);border-top:3px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}#loadingText{color:var(--text-color);font-size:14px}.progress-bar{width:100%;height:4px;background-color:var(--border-color);border-radius:2px;margin:8px 0;overflow:hidden}.progress{height:100%;background-color:var(--primary-color);width:0;transition:width .3s ease}.status-text{font-size:14px;color:#636e72}.convert-button{width:100%;background-color:var(--primary-color);color:#fff;border:none;padding:16px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;margin-bottom:24px;transition:background-color .3s ease}.convert-button:hover{background-color:var(--secondary-color)}.format-selection{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;justify-content:center}.format-btn{background-color:var(--background-color);border:none;padding:8px 16px;border-radius:20px;cursor:pointer;transition:all .3s ease}.format-btn.active{background-color:var(--primary-color);color:#fff}.advanced-settings{background-color:#fff;border-radius:12px;border:1px solid #00000010;padding:20px;margin-bottom:24px}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;cursor:pointer}.settings-header h3{font-size:16px;font-weight:600}.toggle-settings{background:0 0;border:none;cursor:pointer;padding:4px}.toggle-settings img{width:24px;height:24px;transition:transform .3s ease;transform:rotate(0)}.settings-content{display:none}.settings-content.open{display:block}.advanced-settings.open .toggle-settings img,.settings-content.open~.settings-header .toggle-settings img{transform:rotate(180deg)}.setting-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:16px}.setting-select{padding:8px 32px 8px 12px;border-radius:6px;border:1px solid var(--border-color);background-color:#fff;min-width:120px;font-size:14px;color:var(--text-color);cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url('images/icon-chevron-down.svg');background-repeat:no-repeat;background-position:right 8px center;background-size:16px;transition:border-color .3s ease,box-shadow .3s ease}.setting-select:hover{border-color:var(--primary-color)}.setting-select:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(108,92,231,.1)}.setting-select::-ms-expand{display:none}.setting-row label{font-size:14px;color:var(--text-color);font-weight:500}.setting-select:disabled{background-color:var(--background-color);cursor:not-allowed;opacity:.7}.footer{background-color:#fff;border-top:1px solid #00000010;padding:60px 0 0;margin-top:60px;position:relative;left:50%;right:50%;width:100vw;margin-left:-50vw;margin-right:-50vw}.footer-content{max-width:800px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:40px;margin-bottom:40px;padding:0 20px}.footer-section h3{color:var(--text-color);font-size:18px;margin-bottom:20px;font-weight:600}.footer-section p{color:#636e72;line-height:1.6}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:12px}.footer-section ul li a{color:#636e72;text-decoration:none;transition:color .3s ease}.footer-section ul li a:hover{color:var(--primary-color)}.footer-bottom{text-align:center;padding:20px 0;background-color:#fff;color:#636e72;font-size:14px;width:100%}@media (max-width:480px){.container{padding-top:0;padding-left:1rem;padding-right:1rem}.upload-area{padding:20px}.format-selection{gap:6px}.format-btn{padding:6px 12px;font-size:14px}}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.8);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:1000;color:#fff;font-size:1.2em;text-align:center;transition:opacity .3s ease}.loading-overlay.hidden{opacity:0;pointer-events:none}.loading-spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s linear infinite;margin-bottom:20px}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{max-width:80%;margin:0 auto}.progress-container{width:100%;height:4px;background:#eee;border-radius:2px;overflow:hidden;margin:10px 0}.progress-bar{width:0;height:100%;background:#4caf50;transition:width .3s ease}.status-text{font-size:.9em;color:#666;margin:5px 0;min-height:1.2em}.upload-icon img{width:48px;height:48px;opacity:1;transition:opacity .3s ease,filter .3s ease;filter:invert(41%) sepia(90%) saturate(1642%) hue-rotate(227deg) brightness(101%) contrast(98%)}.upload-area:hover .upload-icon img{opacity:1}.navbar{background-color:#fff;border-bottom:1px solid #00000010;position:sticky;top:0;z-index:1000;padding:1rem 0}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}.nav-logo{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--primary-color);font-size:18px}.nav-links{display:flex;gap:24px}.nav-links a{color:var(--text-color);text-decoration:none;font-size:16px;transition:color .3s ease}.nav-links a:hover{color:var(--primary-color)}.nav-links a.active{color:var(--primary-color);font-weight:500}.container{max-width:800px;margin:0 auto;padding:40px 20px}@media (max-width:768px){.nav-links{display:none}.nav-container{justify-content:center}.footer-content{grid-template-columns:1fr;text-align:center}.footer-section{padding:0 20px}}