.bir-container{max-width:980px;margin:40px auto;padding:0 16px}
.bir-card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;box-shadow:0 6px 24px rgba(2,6,23,.06);padding:24px}
.bir-card h1{margin:0 0 8px;font-size:28px}
.bir-card .lead{margin:0 0 24px;color:#475569}
fieldset{border:0;margin:0 0 20px;padding:0}
legend{font-weight:700;margin-bottom:8px}
.grid{display:grid;gap:16px}
.grid.one{grid-template-columns:1fr}
.grid.two{grid-template-columns:1fr 1fr}
.grid.three{grid-template-columns:1fr 1fr 1fr}
@media (max-width:780px){.grid.two,.grid.three{grid-template-columns:1fr}}
label{display:block;font-weight:600;margin-bottom:6px}
.required::after{content:" *";color:#dc2626;font-weight:700}
input,select,textarea{width:100%;border:1px solid #cbd5e1;border-radius:10px;padding:12px;background:#fff;color:#0f172a}
textarea{min-height:160px;resize:vertical}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.btn{appearance:none;border:0;border-radius:12px;padding:12px 18px;font-weight:700;cursor:pointer;background:#e2e8f0;color:#0f172a}
.btn-primary{background:#0ea5e9;color:#fff}
.btn-secondary{background:#94a3b8;color:#fff}
canvas{background:#fff;border:1px dashed #94a3b8;border-radius:10px;touch-action:none;display:block;width:100%;height:auto}
.notice{padding:12px 14px;border-radius:12px;background:#ecfeff;border:1px solid #a5f3fc;color:#075985;margin:16px 0}
.error{padding:12px 14px;border-radius:12px;background:#fef2f2;border:1px solid #fecaca;color:#991b1b;margin:16px 0}
.success{padding:12px 14px;border-radius:12px;background:#ecfdf5;border:1px solid #bbf7d0;color:#065f46;margin:16px 0}
small.helper{display:block;color:#64748b;margin-top:6px}