:root{--bg:#f7f8f5;--panel:#fff;--ink:#1f2933;--muted:#64707d;--line:#d9ded6;--brand:#0f766e;--brand-dark:#115e59;--accent:#b45309;--danger:#b91c1c}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);margin:0;font-family:Arial,Noto Sans TC,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.shell{min-height:100vh;padding:28px}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;display:flex}.brand-title{font-size:22px;font-weight:700}.muted{color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px}.stack{gap:16px;display:grid}.grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;display:grid}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.field{gap:6px;display:grid}.field-full{grid-column:1/-1}label{color:var(--muted);font-size:14px}input,textarea,select{border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:6px;width:100%;padding:10px 12px}textarea{resize:vertical;min-height:96px}.actions{flex-wrap:wrap;gap:10px;display:flex}.button{background:var(--brand);border:1px solid var(--brand);color:#fff;cursor:pointer;border-radius:6px;align-items:center;min-height:40px;padding:9px 14px;font-weight:700;display:inline-flex}.button:hover{background:var(--brand-dark)}.button.secondary{border-color:var(--line);color:var(--ink);background:#fff}.button.danger{color:var(--danger);background:#fff;border-color:#f3c4c4}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;padding:10px}th{color:var(--muted);font-size:13px;font-weight:700}.status{border-radius:999px;padding:4px 8px;font-size:12px;font-weight:700;display:inline-block}.status-REGISTERED{color:#166534;background:#dcfce7}.status-WAITLISTED{color:#92400e;background:#fef3c7}.status-CANCELLED{color:#991b1b;background:#fee2e2}.login{place-items:center;min-height:100vh;padding:20px;display:grid}.login .panel{width:100%;max-width:420px}@media (max-width:720px){.shell{padding:16px}.topbar{flex-direction:column;align-items:flex-start;gap:12px}.form-grid{grid-template-columns:1fr}}