.subjects-container {
     max-width: 900px;
     margin: 40px auto;
     padding: 0 20px;
     font-family: 'Inter', sans-serif;
     color: #333;
 }

 .back-btn {
     display: inline-block;
     margin-bottom: 20px;
     text-decoration: none;
     color: #4f46e5;
     font-weight: 500;
     transition: color 0.3s ease;
 }

 .back-btn:hover {
     color: #3730a3;
 }

 .card {
     background: #fff;
     border-radius: 12px;
     box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
     padding: 25px;
     margin-bottom: 30px;
     transition: transform 0.3s ease, box-shadow 0.3s ease;
 }

 .card:hover {
     transform: translateY(-5px);
     box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
 }

 .section-title {
     font-size: 1.6rem;
     font-weight: bold;
     margin-bottom: 20px;
     border-bottom: 2px solid #4f46e5;
     padding-bottom: 5px;
     color: #111827;
 }

 table.student-info-table,
 table.payment-info-table {
     width: 100%;
     border-collapse: collapse;
 }

 table.student-info-table td,
 table.payment-info-table td {
     padding: 10px;
     border-bottom: 1px solid #e5e7eb;
 }

 .subject-group h3 {
     font-size: 1.2rem;
     font-weight: 600;
     margin-bottom: 10px;
 }

 .subject-group ul {
     list-style: none;
     padding-left: 0;
 }

 .subject-group li {
     background: #f8f8f8;
     margin-bottom: 8px;
     padding: 10px 15px;
     border-radius: 8px;
     display: flex;
     justify-content: space-between;
     align-items: center;
     transition: background 0.3s ease;
 }

 .subject-group li:hover {
     background: #e2e8f0;
 }

 .subject-name {
     font-weight: 500;
 }

 .subject-code {
     font-size: 0.9rem;
     color: #555;
 }

 .subject-group.compulsory li {
     border-left: 5px solid #4f46e5;
 }

 .subject-group.elective li {
     border-left: 5px solid #10b981;
 }

 .subject-group.optional li {
     border-left: 5px solid #f59e0b;
 }

 /* Fade-in Animation */
 @keyframes fadeInUp {
     0% {
         opacity: 0;
         transform: translateY(15px);
     }

     100% {
         opacity: 1;
         transform: translateY(0);
     }
 }

 .fade-in {
     animation: fadeInUp 0.6s ease forwards;
 }

 .fade-in.delay-1 {
     animation-delay: 0.15s;
 }

 .fade-in.delay-2 {
     animation-delay: 0.3s;
 }

 /* Responsive */
 @media (max-width: 600px) {
     .subject-group li {
         flex-direction: column;
         align-items: flex-start;
     }

     .subject-code {
         margin-top: 4px;
     }

     table.student-info-table td,
     table.payment-info-table td {
         display: block;
         width: 100%;
     }
 }