:root{--primary-color: #a729f5}body.dark-mode{background-color:#313e51;color:#fff}body.dark-mode .card{background-color:#3b4d66;color:#fff}body.dark-mode .text-muted{color:#abc1e1!important}.category-icon,.subject-icon{background-color:var(--primary-color)!important;width:50px;height:50px}.subject-item{transition:transform .2s;cursor:pointer}.subject-item:hover{transform:translateY(-2px)}.cursor-pointer{cursor:pointer}.swal2-popup{font-family:system-ui,-apple-system,sans-serif}body{background-color:#f4f6fa;color:#313e51;transition:background-color .3s ease,color .3s ease}body.dark-mode{background-color:#313e51!important;color:#fff}.theme-icon{width:24px;height:24px;object-fit:contain;cursor:pointer}#next-btn,#restart-btn{width:auto;max-width:150px}.option-card:hover{transform:scale(1.02);background-color:#f8f9fa;border-color:#0d6efd!important}.selected{background-color:#e7f1ff!important;font-weight:500}.dark-mode .card{background-color:#2c2f33!important;color:#f1f1f1}.dark-mode .option-card:hover{background-color:#3a3d41!important}.dark-mode .selected{background-color:#1e90ff!important;color:#fff}