Exemple de formulaire de connexion HTML

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HTML

CSS

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@200;300;400;500;600;700&display=swap");

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

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  padding: 0 10px;
  background: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
}

body::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: url("https://i.postimg.cc/0jv27Qvw/20008380-645221846.jpg"), #000;
  background-position: center;
  background-size: cover;
  z-index: -1;
}

.wrapper {
  width: 400px;
  border-radius: 15px;
  padding: 40px;
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);
  transition: all 0.3s ease;
}

.wrapper:hover {
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
}

form {
  display: flex;
  flex-direction: column;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 25px;
  color: #ffffff;
  letter-spacing: 1px;
}

.input-field {
  position: relative;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
  margin: 20px 0;
}

.input-field label {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  color: #ffffff;
  font-size: 16px;
  pointer-events: none;
  transition: 0.3s ease;
}

.input-field input {
  width: 100%;
  height: 40px;
  background: transparent;
  border: none;
  outline: none;
  font-size: 16px;
  color: #ffffff;
  padding: 0 10px;
}

.input-field input:focus~label,
.input-field input:valid~label {
  font-size: 0.9rem;
  top: 10px;
  transform: translateY(-150%);
  color: #ffdde1;
}

.forget {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 25px 0 35px 0;
  color: #ffffff;
}

#remember {
  accent-color: #ffdde1;
}

.forget label {
  display: flex;
  align-items: center;
}

.forget label p {
  margin-left: 8px;
}

.wrapper a {
  color: #ffdde1;
  text-decoration: none;
}

.wrapper a:hover {
  text-decoration: underline;
}

button {
  background-color: #271930;
 color: #ffffff;
  font-weight: 600;
  border: none;
  padding: 15px 20px;
  cursor: pointer;
  border-radius: 25px;
  font-size: 16px;
  border: 2px solid transparent;
  transition: all 0.3s ease;
}

button:hover {
  color: #000000;
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
}

.register {
  text-align: center;
  margin-top: 30px;
  color: #ffffff;
}