.no_teacher {
    background: #ffffff;
    height: calc(100vh - 100px);
    display: flex;
    justify-content: center;
    box-sizing: border-box;
    flex-direction: column;
    align-items: center;text-align: center;
}

.no_teacher img {
    width:80%;max-width: 400px;height: auto;margin-bottom: 30px;
}
.no_teacher p{
    margin-bottom: 15px;
    color: #555555;
    font-size: 20px;
    font-weight: bold;
}