*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 14px;
  color: #00263E;
  font-family: "Noto Sans", Helvetica, Arial, sans-serif;
}

body {
  width: 510px;
  margin: 5rem auto;
  
}

header {
  width: 100%;
  height: auto;
  background-color: #00263E;
  border-radius: 10px 10px 0 0;
}

h1 {
  padding: 2.5rem;
  color: #ffffff;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5rem;
  font-size: 1rem;
  text-align: center;
}

main {
  display: grid;
  grid-template-columns: repeat(2, 250px);
  grid-template-rows: repeat(3, 250px);
  gap: 10px;
}

section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 20px 15px 30px 15px;
  background-color: #A5BAC9;
  border-radius: 5px;
}

h2 {
  margin-bottom: 2rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: #007DB4;
}

p {
  margin-bottom: 2rem;
  line-height: 1.5rem;
}

.placement {
  grid-column: 1;
  grid-row: 1;
  border-top-left-radius: 0px;
  border-top-right-radius: 0px;
}

.optimization {
  grid-column: 2;
  grid-row: 2;
}

.flexibility {
  grid-column: 1;
  grid-row: 3;
}

.img1 {
  background-image: url("https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiI2T_EcEiTAk-TUeJl0BCuZTptgbk73CA0x-VNiRgt-SQompi2oOC2UaZDSZspTwkYUhxN89WK_38k7C2aJ1unY8JrLY5EIlMPrC-bDK463GdBOHRtnblNG8ZGEnbgJ3IatfAyeCLJO30/s1200/poodle-puppy-tips.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  grid-column: 2;
  grid-row: 1;
  border-bottom-right-radius: 5px;
  border-bottom-left-radius: 5px;
}

.img2 {
  background-image: url("https://www.rd.com/wp-content/uploads/2021/03/GettyImages-1133605325-scaled-e1617227898456.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  grid-column: 1;
  grid-row: 2;
  border-radius: 5px;
}

.img3 {
  background-image: url("https://media.4-paws.org/5/f/d/4/5fd49bd37f22287c7172f7468839726c8e46150c/VIER%20PFOTEN_2019-03-15_001-2901x1934-2802x1934-1920x1325.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  grid-column: 2;
  grid-row: 3;
  border-radius: 5px;
}

a:link {
  color: #007DB4;
  text-decoration: none;
  font-weight: 700;
}

a:visited {
  color: #4E738A;
  text-decoration: none;
  font-weight: 700;
}

a:hover {
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 400;
}

a:active {
  color: #007DB4;
}