:root{--background:#f7f7f8;--foreground:#1a1a1a;--border:#e0e0e0;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626}*{box-sizing:border-box}body{background:var(--background);color:var(--foreground);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--primary)}.page{max-width:960px;margin:0 auto;padding:32px 20px}.topbar{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.topbar-title{font-size:18px;font-weight:700}.btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:600;text-decoration:none;display:inline-block}.btn:hover{background:var(--primary-hover)}.btn-secondary{color:var(--foreground);border:1px solid var(--border);background:#fff}.btn-secondary:hover{background:#f0f0f0}.card{border:1px solid var(--border);background:#fff;border-radius:10px;padding:24px}table{border-collapse:collapse;background:#fff;border-radius:10px;width:100%;overflow:hidden}th,td{text-align:left;border-bottom:1px solid var(--border);padding:12px 14px;font-size:14px}th{background:#fafafa;font-weight:600}tr:last-child td{border-bottom:none}.form-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.form-field{flex-direction:column;gap:6px;display:flex}.form-field label{color:#444;font-size:13px;font-weight:600}.form-field input{border:1px solid var(--border);border-radius:6px;padding:10px 12px;font-size:14px}.error-box{color:var(--danger);background:#fef2f2;border:1px solid #fecaca;border-radius:6px;margin-bottom:16px;padding:10px 14px;font-size:14px}.empty-state{text-align:center;color:#666;padding:40px 20px}