:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}#root{width:100%;min-height:100vh}.app{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);padding:2rem 1rem}.container{max-width:800px;margin:0 auto}header{text-align:center;color:#fff;margin-bottom:2rem}header h1{font-size:2.5rem;margin:0 0 .5rem;font-weight:700;text-shadow:0 2px 4px rgba(0,0,0,.2)}header p{font-size:1.1rem;margin:0 0 1rem;opacity:.9}.datetime-display{display:inline-flex;align-items:center;gap:.5rem;background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:.5rem 1rem;border-radius:20px;font-size:.9rem;font-weight:500;margin-top:.5rem;border:1px solid rgba(255,255,255,.2);transition:all .3s ease}.datetime-display:hover{background:#fff3;transform:translateY(-2px);box-shadow:0 4px 12px #0003}.datetime-icon{font-size:1rem}.datetime-text{color:#fff;font-family:Courier New,monospace;letter-spacing:.5px}.inapp-modal{position:fixed;inset:0;background:#0f172a80;display:flex;align-items:center;justify-content:center;padding:1rem;z-index:20}.inapp-card{background:#fff;color:#1f2937;border-radius:16px;padding:1.25rem 1.5rem;max-width:420px;width:100%;box-shadow:0 20px 45px #00000040;text-align:center}.inapp-title{font-size:1.1rem;font-weight:700;margin-bottom:.4rem}.inapp-text{font-size:.95rem;color:#4b5563;margin-bottom:1rem}.inapp-actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}.inapp-button{background:#667eea;color:#fff;border:none;padding:.6rem 1rem;border-radius:10px;font-weight:600;cursor:pointer;transition:all .2s ease}.inapp-button:hover{background:#5568d3;transform:translateY(-1px)}.inapp-secondary{background:#e5e7eb;color:#111827;border:none;padding:.6rem 1rem;border-radius:10px;font-weight:600;cursor:pointer;transition:all .2s ease}.inapp-secondary:hover{background:#d1d5db}.drop-zone{background:#fff;border:3px dashed #cbd5e0;border-radius:12px;padding:3rem 2rem;text-align:center;transition:all .3s ease;cursor:pointer;margin-bottom:2rem}.drop-zone.dragging{border-color:#667eea;background:#f0f4ff;transform:scale(1.02)}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-icon{width:64px;height:64px;color:#667eea;margin-bottom:.5rem}.drop-zone-text{font-size:1.25rem;font-weight:600;color:#2d3748;margin:0}.drop-zone-subtext{font-size:1rem;color:#718096;margin:0}.file-input{display:none}.file-input-label{display:inline-block;padding:.75rem 1.5rem;background:#667eea;color:#fff;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;font-size:1rem}.file-input-label:hover{background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.error-message{background:#fed7d7;color:#c53030;padding:1rem;border-radius:8px;margin-bottom:1.5rem;border-left:4px solid #c53030}.pdf-list{background:#fff;border-radius:12px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 4px 6px #0000001a}.pdf-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:1rem;border-bottom:2px solid #e2e8f0}.pdf-list-header h2{margin:0;color:#2d3748;font-size:1.5rem}.clear-button{background:#fc8181;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;font-weight:600;cursor:pointer;transition:all .2s ease;font-size:.9rem}.clear-button:hover{background:#f56565;transform:translateY(-1px)}.pdf-items{display:flex;flex-direction:column;gap:.75rem}.pdf-item{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:#f7fafc;border-radius:8px;border:1px solid #e2e8f0;transition:all .2s ease}.pdf-item:hover{background:#edf2f7;border-color:#cbd5e0}.pdf-item-info{display:flex;align-items:center;gap:1rem;flex:1;min-width:0}.pdf-number{background:#667eea;color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.pdf-details{flex:1;min-width:0}.pdf-name{font-weight:600;color:#2d3748;margin-bottom:.25rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pdf-size{font-size:.875rem;color:#718096}.pdf-item-actions{display:flex;gap:.5rem;align-items:center}.move-button,.remove-button{background:transparent;border:1px solid #cbd5e0;color:#4a5568;width:32px;height:32px;border-radius:6px;cursor:pointer;font-size:1.25rem;display:flex;align-items:center;justify-content:center;transition:all .2s ease;font-weight:600}.move-button:hover{background:#e2e8f0;border-color:#a0aec0}.remove-button{color:#e53e3e;border-color:#fc8181}.remove-button:hover{background:#fed7d7;border-color:#f56565}.actions{text-align:center}.combine-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:1rem 2.5rem;border-radius:8px;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.combine-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea80}.combine-button:disabled{opacity:.6;cursor:not-allowed}@media(max-width:640px){header h1{font-size:2rem}.drop-zone{padding:2rem 1rem}.pdf-item{flex-direction:column;align-items:flex-start;gap:1rem}.pdf-item-actions{width:100%;justify-content:flex-end}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}