body { background: #0f172a; color: #f1f5f9; font-family: sans-serif; display: flex; justify-content: center; padding: 40px; }
.container { width: 100%; max-width: 500px; background: #1e293b; padding: 30px; border-radius: 15px; box-shadow: 0 10px 25px rgba(0,0,0,0.3); text-align: center; }
.upload-zone { border: 2px dashed #475569; padding: 40px; cursor: pointer; margin-bottom: 20px; border-radius: 10px; }
button { background: #3b82f6; color: white; border: none; padding: 12px 20px; border-radius: 8px; cursor: pointer; margin: 5px; transition: 0.3s; }
button:hover { background: #2563eb; }
.spinner { border: 4px solid #f3f3f3; border-top: 4px solid #3b82f6; border-radius: 50%; width: 30px; height: 30px; animation: spin 1s linear infinite; margin: 20px auto; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
#res { background: #334155; padding: 20px; border-radius: 8px; margin-top: 20px; }