*{margin:0;padding:0;box-sizing:border-box}input,td input,textarea{-webkit-user-select:text;-moz-user-select:text;-ms-user-select:text;user-select:text}html{height:100%;overflow-x:hidden;color-scheme:dark}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#1a1a2e 0,#16213e 100%);min-height:100vh;color:#fff;position:relative}.container{max-width:none;margin:0 auto;padding:20px;padding-left:350px;padding-right:30px;transition:padding-left .3s cubic-bezier(.4, 0, .2, 1)}body.sidebar-collapsed .container{padding-left:80px}body:not(.sidebar-open) .container{padding-left:20px;padding-right:20px;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;min-height:100vh}body:not(.sidebar-open) .container .error-message,body:not(.sidebar-open) .container .upload-section,body:not(.sidebar-open) .container header{max-width:800px;width:100%}body:not(.sidebar-open) .container header{text-align:center;margin-top:40px}body:not(.sidebar-open) .container .upload-section{margin-top:30px}header{text-align:center;padding:30px 0;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:30px;opacity:0;animation:slideDown .6s ease-out .2s forwards}@keyframes slideDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{from{opacity:0;transform:translateX(50px)}to{opacity:1;transform:translateX(0)}}@keyframes slideOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(50px)}}header h1{font-size:3.5em;background:linear-gradient(90deg,#00d9ff,#74b9ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:15px;font-weight:800;letter-spacing:2px}header p{color:#888;font-size:1.3em}.upload-section{background:rgba(255,255,255,.05);border-radius:15px;padding:40px;text-align:center;border:2px dashed rgba(255,255,255,.2);margin-bottom:30px;transition:all .4s cubic-bezier(.4, 0, .2, 1);opacity:0;animation:fadeInUp .6s ease-out .4s forwards}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.upload-section:hover{border-color:#00d9ff;background:rgba(0,217,255,.05);transform:translateY(-5px);box-shadow:0 20px 40px rgba(0,217,255,.1)}.upload-section.dragover{border-color:#74b9ff;background:rgba(116,185,255,.1);transform:scale(1.02)}.upload-icon{font-size:4em;margin-bottom:20px;animation:float 3s ease-in-out infinite}@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}.upload-section h2{margin-bottom:15px;color:#fff}.upload-section p{color:#888;margin-bottom:20px}input[type=file]{display:none}.btn{background:linear-gradient(90deg,#00d9ff,#74b9ff);color:#1a1a2e;border:none;padding:15px 40px;font-size:1.1em;font-weight:700;border-radius:30px;cursor:pointer;transition:all .4s cubic-bezier(.4, 0, .2, 1);position:relative;overflow:hidden}.btn::after{content:'';position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,.3);border-radius:50%;transform:translate(-50%,-50%);transition:width .6s,height .6s}.btn:hover::after{width:300px;height:300px}.btn:hover{transform:translateY(-3px);box-shadow:0 15px 35px rgba(0,217,255,.4)}.btn:active{transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-secondary{background:rgba(255,255,255,.12);color:#ddd;margin-left:10px;border:1px solid rgba(255,255,255,.25)}.btn-secondary:hover{background:rgba(255,255,255,.22);color:#fff;border-color:rgba(255,255,255,.4)}