body { font-family: 'Segoe UI', sans-serif; margin: 0; padding: 20px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; }
.container { max-width: 600px; margin: 0 auto; background: white; padding: 40px; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
h1 { color: #333; text-align: center; margin-bottom: 10px; }
.upload-form { text-align: center; margin: 30px 0; }
input[type="file"] { width: 100%; padding: 15px; border: 2px dashed #667eea; border-radius: 10px; margin-bottom: 20px; }
button { background: #667eea; color: white; padding: 15px 40px; border: none; border-radius: 50px; font-size: 16px; cursor: pointer; transition: all 0.3s; }
button:hover { background: #5a67d8; transform: translateY(-2px); }
.stats { background: #f7fafc; padding: 20px; border-radius: 15px; margin: 20px 0; text-align: center; }
.download-buttons { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 15px 30px; text-decoration: none; border-radius: 50px; font-weight: bold; transition: all 0.3s; }
.btn-primary { background: #48bb78; color: white; }
.btn-secondary { background: #ed8936; color: white; }
.btn-back { background: #a0aec0; color: white; margin-top: 20px; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }