.insc-wrap{display:flex; gap:18px; align-items:flex-start}
  .insc-left{flex: 1 1 680px; min-width: 320px}
  .insc-right{flex: 0 0 320px; position:sticky; top:90px}
  @media (max-width: 980px){
    .insc-wrap{flex-direction:column}
    .insc-right{position:static; width:100%}
  }

  .promo-btn{
    display:block;
    background:#b30000;
    color:#fff;
    text-decoration:none;
    text-align:center;
    font-weight:800;
    padding:12px 14px;
    border-radius:12px;
    box-shadow:0 6px 16px rgba(0,0,0,.18);
    animation:pulsePromo 1.6s infinite;
    letter-spacing:.2px;
  }
  .promo-btn:hover{filter:brightness(1.05)}
  @keyframes pulsePromo{
    0%{transform:scale(1); box-shadow:0 6px 16px rgba(0,0,0,.18)}
    50%{transform:scale(1.03); box-shadow:0 10px 26px rgba(179,0,0,.28)}
    100%{transform:scale(1); box-shadow:0 6px 16px rgba(0,0,0,.18)}
  }

  .side-card{
    background:#fff;
    border-radius:12px;
    box-shadow:0 6px 16px rgba(0,0,0,.10);
    border:1px solid #e6e6e6;
    padding:14px;
    margin-top:12px;
    font-size:13px;
    line-height:1.45;
  }
  .side-card h3{margin:0 0 10px 0; font-size:15px}
  .side-strong{color:#0b6b2a; font-weight:800}
  .side-muted{color:#555}
  .side-list{margin:10px 0 0 18px; padding:0}
  .side-list li{margin:6px 0}