* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #fff;
}

.container {
  width: 80%;
  margin: 0 auto;
  display: flex;
  height: 100vh;
  align-items: center;
}

.left,
.right {
  width: 50%;
  padding: 50px;
  margin-top: -300px;
}

.left h1 {
  font-size: 48px;
  font-weight: bold;
  margin-bottom: 10px;
}

.left p {
  font-size: 16px;
  color: #555;
  margin-bottom: 30px;
}
.left hr {
  margin-bottom: 30px;
  width: 90%;
}
.btn-social {
  display: inline-block;
  padding: 10px 20px;
  color: white;
  text-decoration: none;
  margin-right: 10px;
}

.btn-google {
  background-color: #dd4b39;
}

.btn-facebook {
  background-color: #3b5998;
}
.back {
  display: block;
  text-decoration: none;
  color: #222;
  margin-top: 15px;
}
.right input {
  width: 100%;
  padding: 15px;
  margin-bottom: 20px;
  border: none;
  background: #eee;
  font-size: 16px;
}

.right .note {
  font-size: 12px;
  color: #999;
  margin-bottom: 20px;
}
/*?*/
.right .note a {
  color: #4a61dd;
  text-decoration: none;
}

.login-btn {
  padding: 15px 30px;
  background-color: #333;
  color: white;
  font-weight: bold;
  border: none;
  cursor: pointer;
}

.extra {
  display: inline-block;
  margin-left: 15px;
  font-size: 14px;
  color: #444;
}

.extra a {
  color: #000;
  text-decoration: none;
  font-weight: bold;
}
/*?*/
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  .left,
  .right {
    width: 100%;
    padding: 20px;
  }
}