:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--secondary-color: #64748b;--success-color: #059669;--danger-color: #dc2626;--warning-color: #d97706;--background-color: #f8fafc;--card-background: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--radius-md: .5rem;--radius-lg: .75rem}body{margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--background-color);color:var(--text-primary);line-height:1.5}.container{max-width:1200px;margin:2rem auto;padding:0 1rem}.header{background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));padding:2rem;border-radius:var(--radius-lg);margin-bottom:2rem;box-shadow:var(--shadow-lg)}.header h1{margin:0;color:#fff;font-size:2rem;font-weight:600;text-align:center}.form-section,.table-section{background:var(--card-background);padding:2rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);margin-bottom:2rem}h2{color:var(--text-primary);font-size:1.5rem;margin-top:0;margin-bottom:1.5rem;font-weight:600}.center-management{display:flex;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.center-select{flex:1;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:1rem;color:var(--text-primary);background-color:var(--card-background);transition:all .2s ease;min-width:200px}.center-select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.new-center-button{padding:.75rem 1.5rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.new-center-button:hover{background-color:var(--primary-hover)}.new-center-form{display:flex;gap:1rem;padding:1.5rem;background-color:var(--background-color);border-radius:var(--radius-md);margin-bottom:1.5rem;flex-wrap:wrap}.new-center-input{flex:1;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:1rem;transition:all .2s ease;min-width:200px}.new-center-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}.create-center-button{padding:.75rem 1.5rem;background-color:var(--success-color);color:#fff;border:none;border-radius:var(--radius-md);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap}.create-center-button:hover{background-color:#047857}.file-input{width:100%;padding:2rem;border:2px dashed var(--border-color);border-radius:var(--radius-md);margin:1rem 0;width:calc(100% - 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