.ct {
     width: 100%;
     max-width: 500px;
     margin: 25px auto;
 }

 .donation-card {
     background-color: white;
     border-radius: 20px;
     box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
     overflow: hidden;
 }

 .header {
     background: linear-gradient(to right, #2193b0, #6dd5ed);
     color: white;
     padding: 30px;
     text-align: center;
 }

 .header h1 {
     font-size: 28px;
     margin-bottom: 10px;
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 15px;
 }

 .header p {
     font-size: 16px;
     opacity: 0.9;
 }

 .form-container {
     padding: 30px;
 }

 .form-group {
     margin-bottom: 25px;
     position: relative;
 }

 .form-group label {
     display: block;
     margin-bottom: 8px;
     font-weight: 600;
     color: #333;
     font-size: 15px;
     display: flex;
     align-items: center;
     gap: 8px;
 }

 .form-group label i {
     color: #2193b0;
 }

 .input-with-icon {
     position: relative;
 }

 .input-with-icon i {
     position: absolute;
     left: 15px;
     top: 50%;
     transform: translateY(-50%);
     color: #6dd5ed;
 }

 input {
     width: 100%;
     padding: 15px 15px 15px 45px;
     border: 2px solid #e1e5e9;
     border-radius: 10px;
     font-size: 16px;
     transition: all 0.3s;
     background-color: #f9f9f9;
 }

 input:focus {
     outline: none;
     border-color: #2193b0;
     background-color: white;
     box-shadow: 0 0 0 3px rgba(33, 147, 176, 0.2);
 }

 .amount-options {
     display: flex;
     flex-wrap: wrap;
     gap: 10px;
     margin-top: 10px;
 }

 .amount-btn {
     flex: 1;
     min-width: 80px;
     padding: 12px 5px;
     background-color: #f0f8ff;
     border: 2px solid #e1e5e9;
     border-radius: 8px;
     font-size: 16px;
     font-weight: 600;
     color: #333;
     cursor: pointer;
     transition: all 0.3s;
     text-align: center;
 }

 .amount-btn:hover {
     background-color: #e1f5fe;
     border-color: #2193b0;
 }

 .amount-btn.active {
     background-color: #2193b0;
     color: white;
     border-color: #2193b0;
 }

 .error-message {
     color: #e74c3c;
     font-size: 14px;
     margin-top: 5px;
     display: none;
 }

 .submit-btn {
     width: 100%;
     padding: 17px;
     background: linear-gradient(to right, #2193b0, #6dd5ed);
     color: white;
     border: none;
     border-radius: 10px;
     font-size: 18px;
     font-weight: 600;
     cursor: pointer;
     transition: all 0.3s;
     display: flex;
     justify-content: center;
     align-items: center;
     gap: 10px;
     margin-top: 10px;
 }

 .submit-btn:hover {
     background: linear-gradient(to right, #1a7a94, #5bc0de);
     transform: translateY(-2px);
     box-shadow: 0 5px 15px rgba(33, 147, 176, 0.3);
 }

 .submit-btn:active {
     transform: translateY(0);
 }

 .submit-btn:disabled {
     background: #bdc3c7;
     cursor: not-allowed;
     transform: none;
     box-shadow: none;
 }

 .security-note {
     text-align: center;
     margin-top: 20px;
     font-size: 14px;
     color: #7f8c8d;
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 8px;
 }

 .success-message {
     display: none;
     text-align: center;
     padding: 20px;
     background-color: #d4edda;
     border-radius: 10px;
     margin-top: 20px;
     color: #155724;
     border: 1px solid #c3e6cb;
 }

 .success-message i {
     font-size: 40px;
     margin-bottom: 15px;
     color: #28a745;
 }

 .success-message h3 {
     margin-bottom: 10px;
 }

 .donation-summary {
     background-color: #f8f9fa;
     border-radius: 10px;
     padding: 15px;
     margin-top: 15px;
     border-left: 4px solid #2193b0;
 }

 .summary-item {
     display: flex;
     justify-content: space-between;
     margin-bottom: 8px;
     font-size: 15px;
 }

 .summary-item:last-child {
     margin-bottom: 0;
 }

 .summary-label {
     font-weight: 600;
     color: #555;
 }

 .summary-value {
     color: #2193b0;
     font-weight: 600;
 }

 .footer {
     text-align: center;
     padding: 20px;
     color: white;
     margin-top: 30px;
     opacity: 0.8;
     font-size: 14px;
 }

 @media (max-width: 600px) {
     .container {
         padding: 10px;
     }

     .form-container {
         padding: 20px;
     }

     .header {
         padding: 25px 20px;
     }

     .header h1 {
         font-size: 24px;
     }

     input {
         padding: 13px 13px 13px 40px;
     }

     .amount-btn {
         min-width: 70px;
         padding: 10px 5px;
         font-size: 15px;
     }
 }