/* datasheet button — high visibility */
  .dl{background:linear-gradient(135deg,#EBA45E,#D07E32);color:#1b1005;border:0;font-weight:700;letter-spacing:.12em;box-shadow:0 10px 30px rgba(224,147,78,.30);animation:dlPulse 2.6s ease-in-out infinite}
  .dl:hover{background:linear-gradient(135deg,#F4B269,#DE8C3C);transform:translateY(-2px);box-shadow:0 16px 42px rgba(224,147,78,.5);border-color:transparent}
  .dl span{font-size:15px;animation:dlArrow 1.8s ease-in-out infinite}
  @keyframes dlPulse{0%,100%{box-shadow:0 10px 30px rgba(224,147,78,.28)}50%{box-shadow:0 12px 40px rgba(224,147,78,.55)}}
  @keyframes dlArrow{0%,100%{transform:translateY(0)}50%{transform:translateY(3px)}}
  .btn-ds{display:inline-flex;align-items:center;gap:9px;margin-left:12px;background:linear-gradient(135deg,#EBA45E,#D07E32);color:#1b1005;font-weight:700;box-shadow:0 10px 30px rgba(224,147,78,.30);animation:dlPulse 2.6s ease-in-out infinite}
  .btn-ds:hover{background:linear-gradient(135deg,#F4B269,#DE8C3C)}
  .btn-ds .ar{animation:dlArrow 1.8s ease-in-out infinite}
  @media(max-width:640px){.btn-ds{margin-left:0;margin-top:10px}}
  @media(prefers-reduced-motion:reduce){.dl,.btn-ds,.dl span,.btn-ds .ar{animation:none}}