.inst-section{padding:3.7rem 1rem 4.8rem;background:radial-gradient(circle at 0 0,#1f2937 0, #020617 55%);color:#e5e7eb;}
.inst-inner{max-width:1120px;margin:0 auto;}
.inst-header{text-align:center;margin-bottom:2.4rem;}
.inst-kicker{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:#9ca3af;margin-bottom:.25rem;font-weight:600;}
.inst-title{font-size:1.5rem;margin:0;color:#f9fafb;font-weight:700;}
.inst-sub{margin:.4rem auto 0;max-width:460px;font-size:.85rem;color:#9ca3af;}

.inst-slider{position:relative;margin-top:1.9rem;max-width:1120px;margin-left:auto;margin-right:auto;overflow:hidden;padding:0 2rem;}
.inst-track{display:flex;gap:1.4rem;transition:transform .35s ease;will-change:transform;}
.inst-card{flex:0 0 calc(25% - .95rem);position:relative;overflow:hidden;border-radius:1.3rem;background:#f9fafb;box-shadow:0 22px 50px rgba(15,23,42,.5);padding:1.1rem 1rem 1.6rem;display:flex;flex-direction:column;align-items:flex-start;min-height:410px;}
.inst-photo-wrap{position:relative;width:100%;max-width:269px;height:330px;display:flex;align-items:flex-end;justify-content:center;margin:0 auto;}
.inst-blob{position:absolute;inset:auto 0 0 0;height:80%;border-radius:40% 60% 0 0/55% 50% 0 0;opacity:.9;}
.inst-photo{position:relative;z-index:1;width:100%;height:100%;object-fit:cover;}
.inst-meta{margin-top:.9rem;}
.inst-role{font-size:.78rem;color:#6b7280;margin-bottom:.15rem;}
.inst-name{font-size:1rem;font-weight:700;margin:0;color:#020617;}

.inst-card-bg-1{background:#ffffff;}
.inst-card-bg-1 .inst-blob{background:#e0f2fe;}
.inst-card-bg-2{background:#ffffff;}
.inst-card-bg-2 .inst-blob{background:#dcfce7;}
.inst-card-bg-3{background:#ffffff;}
.inst-card-bg-3 .inst-blob{background:#fef3c7;}
.inst-card-bg-4{background:#ffffff;}
.inst-card-bg-4 .inst-blob{background:#fee2e2;}

.inst-share-btn{position:absolute;right:.9rem;bottom:1.35rem;width:34px;height:34px;border-radius:999px;border:none;background:#eff6ff;color:#2563eb;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 10px 22px rgba(37,99,235,.28);transition:transform .12s ease,box-shadow .12s ease,background-color .12s ease,color .12s ease;z-index:3;}
.inst-share-btn:hover{transform:translateY(-1px);background:#2563eb;color:#eff6ff;box-shadow:0 16px 30px rgba(37,99,235,.38);}
.inst-share-icon i{font-size:.95rem;}

.inst-share-panel{position:absolute;right:.9rem;bottom:3.1rem;display:flex;flex-direction:column;gap:.35rem;opacity:0;transform:translateY(6px);pointer-events:none;transition:opacity .18s ease,transform .18s ease;z-index:2;}
.inst-card.is-share-open .inst-share-panel{opacity:1;transform:translateY(0);pointer-events:auto;}
.inst-social{width:30px;height:30px;border-radius:999px;display:flex;align-items:center;justify-content:center;color:#ffffff;font-size:.76rem;text-decoration:none;box-shadow:0 10px 22px rgba(37,99,235,.35);}
.inst-social.fb{background:#1877f2;}
.inst-social.tw{background:#0f172a;}
.inst-social.ig{background:#e11d48;}
.inst-social.li{background:#0a66c2;}
.inst-nav{position:absolute;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:999px;border:1px solid #020617;background:radial-gradient(circle at 30% 30%,#1f2937 0,#020617 70%);color:#e5e7eb;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 18px rgba(0,0,0,.65);font-size:.85rem;transition:background-color .14s ease,color .14s ease,transform .14s ease,box-shadow .14s ease,border-color .14s ease;z-index:4;}
.inst-nav:hover{background:#2563eb;color:#eff6ff;transform:translateY(-50%) scale(1.05);box-shadow:0 12px 24px rgba(37,99,235,.55);border-color:#2563eb;}
.inst-prev{left:4px;}
.inst-next{right:4px;}

@media (max-width:900px){
  .inst-section{padding:2.8rem 1.1rem 3.2rem;}
  .inst-slider{padding:0 1.2rem;}
  .inst-card{flex:0 0 calc(50% - .9rem);min-height:380px;}
}
@media (max-width:640px){
  .inst-card{flex:0 0 100%;max-width:320px;margin:0 auto;min-height:360px;}
  .inst-prev{left:4px;}
  .inst-next{right:4px;}
}