* {
  padding: 0;
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.flex {
  display: flex;
}

.inline-block {
  display: inline-block;
}

.py-1 {
  padding: 1rem 0;
}

.px-1 {
  padding: 0 1rem;
}

.main {
  width: 80%;
  margin: auto;
}

.my-img {
  width: 3rem;
  height: 3rem;
  border-radius: 100%;
}

.space-between {
  justify-content: space-between;
}

.btn {
  padding: 1rem 3rem;
  color: white;
  border: transparent;
  border-radius: 4px;
}

.btn:hover {
  cursor: pointer;
  opacity: 0.8;
}

.btn:active {
  background-color: darkgreen;
  opacity: 1;
}

#like-btn {
  background-color: cornflowerblue
}

#like-btn[disabled] {
  background-color: #dddddd; /* Màu nền xám nhạt */
  color: #999999; /* Màu chữ xám nhạt */
  cursor: not-allowed; /* Không cho phép cursor pointer */}

#dislike-btn {
  background-color: mediumseagreen
}

#dislike-btn[disabled] {
  background-color: #dddddd; /* Màu nền xám nhạt */
  color: #999999; /* Màu chữ xám nhạt */
  cursor: not-allowed; /* Không cho phép cursor pointer */}

#banner {
  color: white;
  background-color: mediumseagreen;
  padding: 5rem 0;
  text-align: center;
}

#joke {
  padding-top: 4rem;
  text-align: center;
}

#joke>hr {
  margin: auto;
  border: 0;
  border-top: 1px solid lightgrey;
  width: 80%;
  margin-top: 4rem;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex-grow: 1;
}

header {
  box-shadow: 0 0 4px 0px;
  z-index: 1;
}

footer {
  font-size: small;
  background-color: white;
  text-align: center;
  border-top: 1px solid silver;
  padding: 1.5rem 0;
}