.gca-box,.gca-student,.gca-products{margin:20px 0;padding:20px;border:1px solid #ddd;border-radius:6px}
.gca-login{max-width:420px}.gca-login label{display:block;margin-bottom:6px}.gca-login input{width:100%;padding:10px;margin-bottom:12px;box-sizing:border-box}.gca-login button,.gca-product .button,.gca-cart-link .button{padding:10px 16px}
.gca-student{display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:#f7f7f7}.gca-student a{margin-left:auto}
.gca-product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.gca-product{border:1px solid #ddd;padding:16px;border-radius:6px}.gca-price{margin:10px 0 15px;font-weight:600}
.gca-message{padding:12px 16px;margin:15px 0;border-radius:4px}.gca-error{background:#fbeaea}.gca-success{background:#eaf7ea}
.gca-table{width:100%;border-collapse:collapse}.gca-table th,.gca-table td{padding:8px;border-bottom:1px solid #ddd;text-align:left}

.gca-professor-filters{display:flex;gap:12px;align-items:end;flex-wrap:wrap;margin-top:18px}
.gca-professor-filters label{display:flex;flex-direction:column;gap:5px;font-weight:600}
.gca-professor-filters select,.gca-professor-filters button{padding:8px 10px}
.gca-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}
.gca-summary>div{padding:16px;border:1px solid #ddd;border-radius:6px;background:#f7f7f7}
.gca-summary strong,.gca-summary span{display:block}
.gca-summary strong{font-size:24px}
.gca-summary span{margin-top:4px}
.gca-payment{font-weight:600}
.gca-payment-paid{color:#187a2f}
.gca-payment-pending{color:#a15c00}
.gca-table-wrap{overflow-x:auto}
@media(max-width:700px){.gca-summary{grid-template-columns:1fr}.gca-professor-filters{display:block}.gca-professor-filters label{margin-bottom:10px}}