.main-card{background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.3)}.course-row{background:#f8f9fa;padding:1rem;border-radius:10px;margin-bottom:1rem;transition:.3s}.course-row:hover{background:#e9ecef;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.1)}.btn-remove{min-width:40px;height:40px;border-radius:50%;padding:0;font-size:1.2rem;transition:.2s}.btn-remove:hover{transform:rotate(90deg)}.gpa-display{font-size:3rem;font-weight:700;color:var(--primary-color);text-shadow:2px 2px 4px rgba(0,0,0,.1)}.empty-state{text-align:center;padding:3rem 1rem;color:#6c757d}.empty-state-icon{font-size:4rem;margin-bottom:1rem}.chart-container{position:relative;height:300px;margin-top:1rem}.action-buttons{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center}@media (max-width:768px){.gpa-display{font-size:2rem}.btn{font-size:.9rem}}.fade-in{animation:.3s ease-in fadeIn}@keyframes fadeIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.tooltip-icon{cursor:help;margin-left:.25rem;color:#6c757d}.input-error{border-color:var(--danger-color)!important;background-color:#fff5f5}.validation-message{font-size:.875rem;color:var(--danger-color);margin-top:.25rem}