body {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 20px;
  font-family: 'Arial', sans-serif;
  overflow-x: hidden;
}

/* From Uiverse.io by andrew-demchenk0 */ 
.wrapper {
  --input-focus: #2d8cf0;
  --font-color: #323232;
  --font-color-sub: #666;
  --bg-color: #fff;
  --bg-color-alt: #666;
  --main-color: #323232;
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  margin-top: 40vh;
}

/* switch card */
.switch {
  transform: translateY(-200px);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 30px;
  width: 50px;
  height: 20px;
}

.card-side::before {
  position: absolute;
  content: 'Entrar';
  left: -70px;
  top: 0;
  width: 100px;
  text-decoration: underline;
  color: var(--font-color);
  font-weight: 600;
}

.card-side::after {
  position: absolute;
  content: 'Cadastrar';
  left: 70px;
  top: 0;
  width: 100px;
  text-decoration: none;
  color: var(--font-color);
  font-weight: 600;
}

.toggle {
  cursor: pointer;
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  box-sizing: border-box;
  border-radius: 5px;
  border: 2px solid var(--main-color);
  box-shadow: 4px 4px var(--main-color);
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-colorcolor);
  transition: 0.3s;
}

.slider:before {
  cursor: pointer;
  box-sizing: border-box;
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  border: 2px solid var(--main-color);
  border-radius: 5px;
  left: -2px;
  bottom: 2px;
  background-color: var(--bg-color);
  box-shadow: 0 3px 0 var(--main-color);
  transition: 0.3s;
}

.toggle:checked + .slider {
  background-color: var(--input-focus);
}

.toggle:checked + .slider:before {
  transform: translateX(30px);
}

.toggle:checked ~ .card-side:before {
  text-decoration: none;
}

.toggle:checked ~ .card-side:after {
  text-decoration: underline;
}

/* card */ 
.flip-card__inner {
  width: 300px;
  height: 350px;
  position: relative;
  background-color: transparent;
  perspective: 1000px;
  text-align: center;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.toggle:checked ~ .flip-card__inner {
  transform: rotateY(180deg);
}

.toggle:checked ~ .flip-card__front {
  box-shadow: none;
}

.flip-card__front, .flip-card__back {
  padding: 20px;
  position: absolute;
  display: flex;
  flex-direction: column;
  justify-content: center;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  background: lightgrey;
  gap: 20px;
  border-radius: 5px;
  border: 2px solid var(--main-color);
  box-shadow: 4px 4px var(--main-color);
}

.flip-card__back {
  width: 100%;
  transform: rotateY(180deg);
}

.flip-card__form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.title {
  margin: 20px 0 20px 0;
  font-size: 25px;
  font-weight: 900;
  text-align: center;
  color: var(--main-color);
}

.flip-card__input {
  width: 250px;
  height: 40px;
  border-radius: 5px;
  border: 2px solid var(--main-color);
  background-color: var(--bg-color);
  box-shadow: 4px 4px var(--main-color);
  font-size: 15px;
  font-weight: 600;
  color: var(--font-color);
  padding: 5px 10px;
  outline: none;
}

.flip-card__input::placeholder {
  color: var(--font-color-sub);
  opacity: 0.8;
}

.flip-card__input:focus {
  border: 2px solid var(--input-focus);
}

.flip-card__btn:active, .button-confirm:active {
  box-shadow: 0px 0px var(--main-color);
  transform: translate(3px, 3px);
}

.flip-card__btn {
  margin: 20px 0 20px 0;
  width: 120px;
  height: 40px;
  border-radius: 5px;
  border: 2px solid var(--main-color);
  background-color: var(--bg-color);
  box-shadow: 4px 4px var(--main-color);
  font-size: 17px;
  font-weight: 600;
  color: var(--font-color);
  cursor: pointer;
} 

.forgot-password {
  margin-top: 10px;
  text-align: center;
  text-decoration: underline;
  color: #2d8cf0;
}

.forgot-password a {
  color: #08d;
  text-decoration: none;
  font-size: 1.3rem;
}

.forgot-password a:hover {
  text-decoration: underline;
}

.success-message {
  background-color: #d4edda;
  color: #12e042;
  padding: 10px;
  margin: 10px 0;
  border: 1px solid #c3e6cb;
  border-radius: 5px;
  text-align: center;
}

.error-message {
  background-color: #ff4d4d;
  color: white;
  text-align: center;
  padding: 10px;
  border-radius: 5px;
  font-weight: bold;
  margin-bottom: 15px;
}

.success-message {
  background-color: #4CAF50;
  color: white;
  text-align: center;
  padding: 10px;
  border-radius: 5px;
  font-weight: bold;
  margin-bottom: 15px;
}

/* Quando o body estiver com a classe .dark-mode */
body.dark-mode .flip-card__front,
body.dark-mode .flip-card__back {
  /* Borda e sombra brancas */
  border: 2px solid #fff !important;
  box-shadow: 4px 4px #fff !important;
}

/* Para mudar o texto "Entrar" / "Cadastrar" (card-side::before e ::after) para branco */
body.dark-mode .card-side::before,
body.dark-mode .card-side::after {
  color: #fff !important; 
}