body {
  background-color: blue;
  margin: 0;
  padding: 0;
  background-size: cover;
  font-family: sans-serif;
  height: 100vh;
  color: #fff;
}

::placeholder { color: black; }

.wave{
  position: absolute;
  bottom: -.5rem;
  left: 0;
  height: 11rem;
  width: 100%;
  background: url(wave.png);
  background-size: 100rem 11rem;
  animation: waves 8s linear infinite;
  background-repeat: repeat-x;
}

.wave2{
  animation-direction: reverse;
  animation-duration: 6s;
  opacity: .3;
}

.wave3{
  animation-duration: 4s;
  opacity: .5;
}

@keyframes waves{
0%{
    background-position-x: 0;
}
100%{
    background-position-x: 100rem;
}
}

.login-box {
  background-color: blue;
  width: 320px;
  height: 420px;
  color: #fff;
  top: 50%;
  left: 50%;
  position: absolute;
  transform: translate(-50%, -50%);
  box-sizing: border-box;
  padding: 70px 30px;
}

.login-box .avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  position: absolute;
  top: -50px;
  left: calc(50% - 50px);
}

.login-box h1 {
  color: black;
  margin: 0;
  padding: 0 0 20px;
  text-align: center;
  font-size: 22px;
}

.login-box label {
  margin: 0;
  padding: 0;
  font-weight: bold;
  display: block;
}

.login-box input {
  color: black;
  width: 100%;
  margin-bottom: 20px;
}

.login-box input[type="text"], .login-box input[type="password"] {
  border: none;
  border-bottom: 1px solid #fff;
  background: transparent;
  outline: none;
  height: 40px;
  color: black;
  font-size: 16px;
}


.login-box input[type="submit"] {
  border: none;
  outline: none;
  height: 40px;
  background: #b80f22;
  color: #fff;
  font-size: 18px;
  border-radius: 20px;
}



.login-box input[type="submit"]:hover {
  cursor: pointer;
  background: #474e4b;
  color: #ffff;
}

.login-box a {
  text-decoration: none;
  font-size: 12px;
  line-height: 20px;
  color: black;
}

.login-box a:hover {
  color: #fff;
}

#error{
background-color: #9b9b9b;
color: black;
text-align: center;
font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
text-shadow: 1px 1px 2px red;
}