.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.split-page{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(135deg,#667eea,#764ba2);background-attachment:fixed}.split-header{background:hsla(0,0%,100%,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,.1);padding:2rem 0;box-shadow:0 1px 3px rgba(0,0,0,.1)}.back-link{display:inline-flex;align-items:center;color:#667eea;font-weight:600;margin-bottom:1rem;transition:all .2s;text-decoration:none}.back-link:hover{color:#764ba2;transform:translateX(-4px)}.split-title{font-size:2.75rem;font-weight:800;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.split-subtitle{color:#64748b;font-size:1.125rem}.split-main{flex:1 1;padding:3rem 0}.split-container{max-width:800px;margin:0 auto}.upload-section{margin-bottom:2rem}.upload-label{display:block;cursor:pointer}.upload-area{border:3px dashed hsla(0,0%,100%,.5);border-radius:1.5rem;padding:3rem 2rem;text-align:center;background:hsla(0,0%,100%,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s;box-shadow:0 4px 6px rgba(0,0,0,.1)}.upload-label:hover .upload-area{border-color:hsla(0,0%,100%,.8);background:#fff;transform:translateY(-2px);box-shadow:0 8px 12px rgba(0,0,0,.15)}.upload-icon{font-size:3rem;margin-bottom:1rem}.upload-text{display:flex;flex-direction:column;gap:.5rem}.upload-text strong{color:#1e293b;font-size:1.125rem}.upload-text span{color:#64748b;font-size:.9375rem}.page-count{color:#3b82f6;font-weight:500}.upload-input{display:none}.error-message{background:#fee2e2;border:1px solid #fecaca;color:#991b1b;padding:1rem;border-radius:.5rem;margin-bottom:1.5rem}.preview-fallback{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:.875rem;background:#f1f5f9}.ranges-section{background:hsla(0,0%,100%,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.2);border-radius:1.5rem;padding:2.5rem;box-shadow:0 8px 16px rgba(0,0,0,.1)}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.section-title{font-size:1.75rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.add-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:.625rem 1.25rem;border-radius:.75rem;font-weight:600;transition:all .3s;box-shadow:0 4px 6px rgba(102,126,234,.3)}.add-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 12px rgba(102,126,234,.4)}.add-button:disabled{opacity:.5;cursor:not-allowed}.ranges-list{display:flex;flex-direction:column;gap:1.5rem;margin-bottom:2rem}.range-item{padding:1.5rem;background:#f8fafc;border-radius:.5rem;border:1px solid #e2e8f0}.range-label{font-weight:600;color:#475569;margin-bottom:1rem;font-size:.9375rem}.range-content{display:flex;flex-direction:column;gap:1.5rem}.range-inputs{display:flex;align-items:flex-end;gap:1rem;flex-wrap:wrap}.range-preview{margin-top:1rem;padding-top:1.5rem;border-top:2px solid #e2e8f0}.preview-label{font-size:.875rem;font-weight:600;color:#475569;margin-bottom:1rem}.preview-container{width:100%}.preview-pages{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:1.5rem;gap:1.5rem}.preview-page-item{display:flex;flex-direction:column;align-items:center}.preview-page-label{font-size:.75rem;font-weight:600;color:#64748b;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em}.range-pdf-preview{width:100%;height:200px;border:none;border-radius:.375rem;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.1);pointer-events:none}.input-group{display:flex;flex-direction:column;gap:.5rem;flex:1 1;min-width:120px}.input-group label{font-size:.875rem;color:#64748b;font-weight:500}.number-input{padding:.5rem;border:1px solid #cbd5e1;border-radius:.375rem;font-size:1rem;transition:border-color .2s}.number-input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.1)}.number-input:disabled{background:#f1f5f9;cursor:not-allowed}.range-separator{color:#64748b;font-weight:500;padding-bottom:.5rem}.remove-button{background:#ef4444;color:#fff;padding:.5rem 1rem;border-radius:.375rem;font-weight:500;font-size:.875rem;transition:background .2s}.remove-button:hover:not(:disabled){background:#dc2626}.remove-button:disabled{opacity:.5;cursor:not-allowed}.progress-section{margin-bottom:2rem}.progress-root{position:relative;overflow:hidden;background:#e2e8f0;border-radius:9999px;width:100%;height:.5rem;margin-bottom:.5rem}.progress-indicator{background:#3b82f6;height:100%;border-radius:9999px;transition:width .3s ease}.progress-text{text-align:center;color:#64748b;font-size:.875rem}.split-button{width:100%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:1.25rem;border-radius:.75rem;font-size:1.25rem;font-weight:700;transition:all .3s;box-shadow:0 4px 6px rgba(102,126,234,.3)}.split-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 16px rgba(102,126,234,.4)}.split-button:disabled{opacity:.5;cursor:not-allowed}.dialog-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:50}.dialog-content{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;border-radius:.5rem;padding:1.5rem;box-shadow:0 20px 25px -5px rgba(0,0,0,.1);z-index:51;width:90vw;max-width:400px}.dialog-title{font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.5rem}.dialog-description{color:#64748b;line-height:1.6}.dialog-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:.625rem 1.5rem;border-radius:.5rem;font-weight:600;transition:all .2s}.dialog-button:hover{transform:translateY(-1px);box-shadow:0 4px 6px rgba(102,126,234,.3)}.pdf-viewer-dialog{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;border-radius:1rem;padding:0;box-shadow:0 25px 50px -12px rgba(0,0,0,.25);z-index:51;width:90vw;max-width:900px;height:85vh;max-height:800px;display:flex;flex-direction:column;animation:contentShow .15s cubic-bezier(.16,1,.3,1)}.pdf-viewer-title{padding:1.5rem;font-size:1.25rem;font-weight:700;color:#1e293b;border-bottom:1px solid #e2e8f0;margin:0}.pdf-viewer-container{flex:1 1;overflow:hidden;padding:1.5rem;background:#f8fafc}.pdf-viewer-iframe{width:100%;height:100%;border:none;border-radius:.5rem;background:#fff;box-shadow:0 4px 6px rgba(0,0,0,.1)}@keyframes contentShow{0%{opacity:0;transform:translate(-50%,-48%) scale(.96)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@media (max-width:768px){.split-title{font-size:2rem}.ranges-section{padding:1.5rem}.range-inputs{flex-direction:column;align-items:stretch}.range-separator{display:none}.section-header{flex-direction:column;align-items:flex-start;gap:1rem}.add-button{width:100%}.preview-pages{grid-template-columns:1fr}.pdf-viewer-dialog{width:95vw;height:90vh;max-height:none}}