:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--bg-color: #f9fafb;--text-main: #111827;--text-muted: #6b7280;--border-color: #e5e7eb}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-main);line-height:1.5}h1{font-size:2.25rem;font-weight:700;margin-bottom:1rem;color:var(--text-main)}.manual-link{display:flex;align-items:center;gap:.5rem}.external-id-input{width:140px;padding:.55rem .75rem;border:1px solid var(--border-color, #d1d5db);border-radius:6px;background:#fff;color:#111827;font-size:.875rem;outline:none;box-sizing:border-box}.external-id-input:focus{border-color:#4f46e5;box-shadow:0 0 0 2px #4f46e526}.external-id-input::-webkit-inner-spin-button,.external-id-input::-webkit-outer-spin-button{margin:0}.submit-button{padding:.55rem 1rem;border:none;border-radius:6px;background:#4f46e5;color:#fff;font-size:.875rem;font-weight:600;cursor:pointer;transition:background-color .15s ease,opacity .15s ease}.submit-button:hover:not(:disabled){background:#4338ca}.submit-button:disabled{opacity:.45;cursor:not-allowed}