/* Form */
.form .input-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.input-group label {
  top: 0;
  position: absolute;
  color: gray;
  padding: 1rem 0.5rem;
  cursor: text;
  transition: font-size 0.3s, padding 0.3s;
  user-select: none;
}

.form .input-form::placeholder {
  visibility: hidden;
  color: #00000000;
}

.form .input-form {
  display: block;
  width: 100%;
  border: none;
  border-bottom: gray 3px solid;
  padding: 1.3rem 0.5rem 0.7rem;
  font-size: 1rem;
  border-radius: 5px;
  box-sizing: border-box;
}

.form textarea {
  resize: none;
}

.input-group .input-form:focus + label,
.input-group .input-form:not(:placeholder-shown) + label {
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
}

.form .input-form:focus-visible {
  outline: none;
  border-bottom: var(--blue) solid 3px;
}

.form .input-form:focus-visible + label {
  color: var(--blue);
}

.invalid-input-message {
  color: red;
  display: none;
  position: absolute;
  bottom: -1.3rem;
}

.form .invalid-input-group .input-form {
  border-bottom: red solid 3px;
}

.form .invalid-input-group .input-form + label {
  color: red;
}

.invalid-input-group .invalid-input-message {
  display: block;
}

.form .btn.form-button {
  margin-top: 0.5rem;
  transition: filter 0.3s, background-color 0.3s, color 0.3s;
}

.form .btn.form-button:disabled {
  filter: brightness(80%) contrast(90%);
  cursor: unset;
}