* {
    padding: 0;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}

/* relativw */
.square1 {
    height: 25px;
    width: 25px;
    background-color: blue;
    position: relative;
    bottom: -20px;
    right: -50px;
}

/* absolute */
.banner {
    position: absolute;
    right: 0;
    top: 350px;
    margin-right: 20px;
    width: 80px;
    height: 65px;
    color: white;
    background-color: rgb(90, 90, 90);
    border-radius: 7px;
    display: flex;
    align-items: end;
    justify-content: center;
    font-size: 40px;
}

/* relative + absolute */
.card {
    position: relative;
    width: 250px;
    min-height: 350px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
}

.profile {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #555;
    margin: 0 auto 20px auto;
}

.name {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.btn {
    position: absolute;
    bottom: 15px;
    left: 15px;
    background: #e44;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
}

/* fixed */
.scroll-up-button{
    position: fixed;
    left: 0;
    bottom: 0;
    margin-bottom: 20px;
    margin-left: 20px;
    width: 65px;
    height: 65px;
    color: white;
    background-color: rgb(114, 137, 61);
    border-radius: 50%;
    display: flex;
    align-items: end;
    justify-content: center;
    font-size: 40px;
}

/* sticky */
.banner-sticky {
  position: sticky;
  top: 50px;
  width: 200px;
  padding: 20px;
  background-color: rgb(70, 70, 70);
  color: white;
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  border-radius: 10px;
}