styles.css

 * {

  margin: 0;

  padding: 0;

  box-sizing: border-box;

}

body {

  display: flex;

  justify-content: center;

  align-items: center;

  min-height: 100vh;

  background: url(https://wallpapercave.com/wp/wp2939885.jpg) no-repeat;

  background-size: cover;

  background-position: center;

}

header {

  position: fixed;

  top: 0;

  left: 0;

  width: 100%;

  padding: 20% 100px;

  background: transparent;

  display: flex;

  justify-content: space-between;

  align-items: center;

  z-index: 99;

}

.logo {

  font-size: 2em;

  color: #fff;

  user-select: none;

}

.navigation a {

  position: relative;

  font-size: 1.1em;

  color: #fff;

  text-decoration: none;

  font-weight: 500;

  margin-left: 40px;

}

.navigation a::after {

  content: attr();

  position: absolute;

  left: 0;

  bottom: -6px;

  width: 100%;

  height: 3px;

  background: #fff;

  border-radius: 5px;

  transform-origin: right;

  transform: scaleX(0);

  transition: transform 0.5s;

}

.navigation a:hover::after {

  transform-origin: left;

  transform: scaleX(1);

}

.navigation .btnLogin-popup {

  width: 130px;

  height: 50px;

  background: transparent;

  border: 2px solid #fff;

  outline: none;

  border-radius: 6px;

  cursor: pointer;

  font-size: 1.1em;

  color: #fff;

  font-weight: 500;

  margin-left: 40px;

}

.navigation .btnLogin-popup:hover .wrapper {

  position: relative;

  width: 400px;

  height: 440px;

  background: transparent;

  border: 2px solid rgba (255, 255, 255, 0.5);

  border-radius: 20px;

  backdrop-filter: blur(20px);

  box-shadow: 0 0 30px rgba(255, 255, 255, 0.5);

  display: flex;

  justify-content: center;

}

.wrapper {

  position: relative;

  width: 400px;

  height: 440px;

  background: transparent;

  border: 2px solid rgba(225, 225, 225, 0.5);

  border-radius: 20px;

  backdrop-filter: blur(20px);

  box-shadow: 0 0 30px rgba(255, 255, 255, 0.5);

  display: flex;

  justify-content: center;

  align-items: center;

}

.wrapper .form-box {

  width: 100%;

  padding: 40px;

}

.wrapper .icon-close {

  position: absolute;

  top: 0;

  right: 0;

  width: 45px;

  background: #162938;

  font-size: 2em;

  color: #fff;

  display: flex;

  justify-content: center;

  align-items: center;

  border-bottom-left-radius: 20px;

  cursor: pointer;

  z-index: 1;

}

.form-box h2 {

  font-size: 2em;

  color: #ffffff;

  text-align: center;

}

.input-box {

  position: relative;

  width: 100%;

  height: 50px;

  border-bottom: 2px solid #ffffff;

  margin: 30px 0;

}

.input-box label {

  position: absolute;

  top: 50%;

  left: 5px;

  transform: translateY(-50%);

  font-size: 1em;

  color: #fff;

  pointer-events: none;

}

.input-box input {

  width: 100%;

  height: 100%;

  background: transparent;

  border: none;

  outline: none;

}

.input-box .icon {

  position: absolute;

  right: 8px;

  font-size: 1.2rem;

  color: #fff;

  line-height: 57px;

}

.remember-forgot {

  font-size: 0.9em;

  color: #fff;

  font-weight: 500;

  margin: -15px 0 15px;

  display: flex;

  justify-content: space-between;

}

.remember-forgot label input {

  accent-color: #fff;

  margin-right: 3px;

}

.remember-forgot a {

  color: aliceblue;

  text-decoration: none;

}

.remember-forgot a:hover {

  text-decoration: underline;

}

.btn {

  width: 100%;

  height: 45px;

  background: #162938;

  border: none;

  outline: none;

  border-radius: 6px;

  cursor: pointer;

  font-size: 1em;

  color: #fff;

  font-weight: 500;

}

.login-register {

  font-size: 0.9em;

  color: #162938;

  text-align: center;

  font-weight: 500;

  margin: 25px 0 10px;

}

.login-register p a {

  color: #162938;

  text-decoration: none;

  font-weight: 600;

}