:root{--splitpdfs-primary-blue:#2c80ff;--splitpdfs-primary-dark:#1a5fd6;--splitpdfs-light-gray:#f5f7fa;--splitpdfs-medium-gray:#e1e5eb;--splitpdfs-dark-gray:#5a6778;--splitpdfs-text-color:#333;--splitpdfs-white:#ffffff;--splitpdfs-success:#28a745;--splitpdfs-error:#dc3545;--splitpdfs-warning:#ffc107;--splitpdfs-border-radius:8px;--splitpdfs-box-shadow:0 4px 12px rgba(0, 0, 0, 0.08);--splitpdfs-transition:all 0.3s ease}.splitpdfs-container{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:var(--splitpdfs-text-color);background-color:var(--splitpdfs-light-gray);padding:20px;max-width:1200px;margin:0 auto}.splitpdfs-header{text-align:center;margin-bottom:30px;padding:20px;background-color:var(--splitpdfs-white);border-radius:var(--splitpdfs-border-radius);box-shadow:var(--splitpdfs-box-shadow)}.splitpdfs-header h1{color:var(--splitpdfs-primary-dark);margin-bottom:10px;font-size:2.2rem}.splitpdfs-header p{color:var(--splitpdfs-dark-gray);font-size:1.1rem;max-width:800px;margin:0 auto}.splitpdfs-tagline{display:inline-block;background-color:#e8f0fe;color:var(--splitpdfs-primary-dark);padding:5px 15px;border-radius:20px;font-size:.9rem;margin-top:10px}.splitpdfs-main-container{display:grid;grid-template-columns:1fr;gap:30px}@media (min-width:992px){.splitpdfs-main-container{grid-template-columns:1fr 1fr}}.splitpdfs-card{background-color:var(--splitpdfs-white);border-radius:var(--splitpdfs-border-radius);box-shadow:var(--splitpdfs-box-shadow);padding:25px;margin-bottom:20px}.splitpdfs-card-title{display:flex;align-items:center;margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid var(--splitpdfs-medium-gray)}.splitpdfs-card-title i{color:var(--splitpdfs-primary-blue);margin-right:10px;font-size:1.2rem}.splitpdfs-card-title h2{color:var(--splitpdfs-primary-dark);font-size:1.4rem}.splitpdfs-upload-area{border:3px dashed var(--splitpdfs-medium-gray);border-radius:var(--splitpdfs-border-radius);padding:40px 20px;text-align:center;transition:var(--splitpdfs-transition);cursor:pointer;margin-bottom:20px;position:relative}.splitpdfs-upload-area:hover,.splitpdfs-upload-area.dragover{border-color:var(--splitpdfs-primary-blue);background-color:rgb(44 128 255 / .05)}.splitpdfs-upload-area i{font-size:3rem;color:var(--splitpdfs-primary-blue);margin-bottom:15px}.splitpdfs-upload-area h3{margin-bottom:10px;color:var(--splitpdfs-primary-dark)}.splitpdfs-upload-area p{color:var(--splitpdfs-dark-gray);margin-bottom:20px}.splitpdfs-btn{display:inline-block;background-color:var(--splitpdfs-primary-blue);color:#fff;border:none;padding:12px 24px;border-radius:var(--splitpdfs-border-radius);cursor:pointer;font-size:1rem;font-weight:600;transition:var(--splitpdfs-transition);text-align:center;text-decoration:none}.splitpdfs-btn:hover{background-color:var(--splitpdfs-primary-dark);transform:translateY(-2px)}.splitpdfs-btn:active{transform:translateY(0)}.splitpdfs-btn-secondary{background-color:var(--splitpdfs-medium-gray);color:var(--splitpdfs-text-color)}.splitpdfs-btn-secondary:hover{background-color:var(--splitpdfs-dark-gray);color:#fff}.splitpdfs-btn-success{background-color:var(--splitpdfs-success)}.splitpdfs-btn-success:hover{background-color:#218838}.splitpdfs-btn-disabled{background-color:var(--splitpdfs-medium-gray);cursor:not-allowed;opacity:.6}.splitpdfs-btn-disabled:hover{transform:none;background-color:var(--splitpdfs-medium-gray)}.splitpdfs-file-input{display:none}.splitpdfs-preview-container{max-height:400px;overflow-y:auto;margin-top:20px}.splitpdfs-preview-item{display:flex;align-items:center;padding:15px;background-color:var(--splitpdfs-light-gray);border-radius:var(--splitpdfs-border-radius);margin-bottom:10px;border:1px solid var(--splitpdfs-medium-gray)}.splitpdfs-preview-item i{color:var(--splitpdfs-primary-blue);font-size:1.5rem;margin-right:15px}.splitpdfs-file-info{flex-grow:1}.splitpdfs-file-info h4{margin-bottom:5px;color:var(--splitpdfs-primary-dark);word-break:break-all}.splitpdfs-file-info p{color:var(--splitpdfs-dark-gray);font-size:.9rem}.splitpdfs-remove-btn{background:none;border:none;color:var(--splitpdfs-error);font-size:1.2rem;cursor:pointer;padding:5px 10px;border-radius:50%;transition:var(--splitpdfs-transition)}.splitpdfs-remove-btn:hover{background-color:rgb(220 53 69 / .1)}.splitpdfs-split-options{margin-bottom:20px}.splitpdfs-option-group{margin-bottom:25px}.splitpdfs-option-group h3{margin-bottom:15px;color:var(--splitpdfs-primary-dark);font-size:1.1rem}.splitpdfs-radio-group{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:15px}.splitpdfs-radio-option{display:flex;align-items:center}.splitpdfs-radio-option input{margin-right:8px}.splitpdfs-radio-option label{cursor:pointer}.splitpdfs-form-group{margin-bottom:20px}.splitpdfs-form-group label{display:block;margin-bottom:8px;font-weight:600;color:var(--splitpdfs-primary-dark)}.splitpdfs-form-control{width:100%;padding:12px 15px;border:1px solid var(--splitpdfs-medium-gray);border-radius:var(--splitpdfs-border-radius);font-size:1rem;transition:var(--splitpdfs-transition)}.splitpdfs-form-control:focus{outline:none;border-color:var(--splitpdfs-primary-blue);box-shadow:0 0 0 3px rgb(44 128 255 / .2)}.splitpdfs-form-help{font-size:.85rem;color:var(--splitpdfs-dark-gray);margin-top:5px}.splitpdfs-advanced-options{background-color:var(--splitpdfs-light-gray);padding:20px;border-radius:var(--splitpdfs-border-radius);margin-top:20px;border-left:4px solid var(--splitpdfs-primary-blue)}.splitpdfs-advanced-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;cursor:pointer}.splitpdfs-advanced-header h3{color:var(--splitpdfs-primary-dark);font-size:1.1rem}.splitpdfs-advanced-content{display:none}.splitpdfs-advanced-content.show{display:block}.splitpdfs-checkbox-group{display:flex;align-items:center;margin-bottom:15px}.splitpdfs-checkbox-group input{margin-right:10px}.splitpdfs-progress-container{margin:30px 0;display:none}.splitpdfs-progress-container.active{display:block}.splitpdfs-progress-header{display:flex;justify-content:space-between;margin-bottom:10px}.splitpdfs-progress-bar{height:12px;background-color:var(--splitpdfs-medium-gray);border-radius:6px;overflow:hidden;margin-bottom:10px}.splitpdfs-progress-fill{height:100%;background:linear-gradient(90deg,var(--splitpdfs-primary-blue),var(--splitpdfs-primary-dark));width:0%;transition:width 0.3s ease;border-radius:6px}.splitpdfs-progress-status{margin-top:8px;font-size:.9rem;color:var(--splitpdfs-dark-gray);text-align:center}.splitpdfs-message{padding:15px;border-radius:var(--splitpdfs-border-radius);margin-bottom:20px;display:none}.splitpdfs-message.show{display:block}.splitpdfs-message-success{background-color:rgb(40 167 69 / .1);border-left:4px solid var(--splitpdfs-success);color:#155724}.splitpdfs-message-error{background-color:rgb(220 53 69 / .1);border-left:4px solid var(--splitpdfs-error);color:#721c24}.splitpdfs-message-info{background-color:rgb(44 128 255 / .1);border-left:4px solid var(--splitpdfs-primary-blue);color:var(--splitpdfs-primary-dark)}.splitpdfs-footer{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid var(--splitpdfs-medium-gray);color:var(--splitpdfs-dark-gray);font-size:.9rem}.splitpdfs-footer a{color:var(--splitpdfs-primary-blue);text-decoration:none}.splitpdfs-footer a:hover{text-decoration:underline}@media (max-width:768px){.splitpdfs-container{padding:15px}.splitpdfs-header h1{font-size:1.8rem}.splitpdfs-card{padding:20px}.splitpdfs-radio-group{flex-direction:column;gap:10px}}.splitpdfs-spinner{display:inline-block;width:20px;height:20px;border:3px solid rgb(255 255 255 / .3);border-radius:50%;border-top-color:#fff;animation:splitpdfs-spin 1s ease-in-out infinite}@keyframes splitpdfs-spin{to{transform:rotate(360deg)}}