*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2)}.App,body{min-height:100vh}.App{display:flex;flex-direction:column}.app-header{background:rgba(255,255,255,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:2rem;text-align:center;color:white;border-bottom:1px solid rgba(255,255,255,.2)}.app-header h1{font-size:3rem;margin-bottom:.5rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.app-header p{font-size:1.2rem;opacity:.9}.app-main{flex:1 1;padding:2rem;max-width:1400px;margin:0 auto;width:100%}.card{background:rgba(255,255,255,.95);border-radius:16px;padding:1.5rem;box-shadow:0 8px 32px rgba(0,0,0,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);margin-bottom:1.5rem}.card h2{color:#2d3748;margin-bottom:1rem;font-size:1.5rem;font-weight:600}.card h3{color:#4a5568;margin-bottom:.75rem;font-size:1.2rem}.btn,.card h3{font-weight:500}.btn{background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;padding:.75rem 1.5rem;border-radius:8px;font-size:1rem;cursor:pointer;transition:all .3s ease;display:inline-flex;align-items:center;gap:.5rem}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,.4)}.btn:active{transform:translateY(0)}.btn-secondary{background:#e2e8f0;color:#4a5568}.btn-secondary:hover{background:#cbd5e0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.input{width:100%;padding:.75rem;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;transition:border-color .3s ease}.input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.grid{display:grid;grid-gap:1.5rem;gap:1.5rem}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.loading{display:flex;justify-content:center;align-items:center;padding:2rem}.spinner{width:40px;height:40px;border:4px solid #e2e8f0;border-top-color:#667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@media (max-width:768px){.app-header{padding:1rem}.app-header h1{font-size:2rem}.app-main{padding:1rem}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.upload-area{border:2px dashed #cbd5e0;border-radius:12px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s ease;background:#f7fafc}.upload-area.drag-active,.upload-area:hover{border-color:#667eea;background:#edf2f7;transform:translateY(-2px)}.upload-area p{margin:.5rem 0;color:#4a5568}.upload-area .text-muted{color:#a0aec0;font-size:.9rem}.text-center{text-align:center}.text-right{text-align:right}.text-muted{color:#a0aec0}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}