style.css

@import url("https://fonts.googleapis.com/css2?family=Lato:wght@400;700&display=swap");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.black-theme {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #161623;
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  font-family: "Lato", sans-serif;
  letter-spacing: 0.5px;
  font-weight: 400;
}
.black-theme:before {
  position: absolute;
  content: "";
  left: 40%;
  bottom: -40%;
  width: 600px;
  height: 600px;
  background: linear-gradient(#FF5722, #FF9800);
  border-radius: 50%;
}
.black-theme .card {
  width: 350px;
  height: 500px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  overflow: hidden;
}
.black-theme .card .card__top {
  height: 155px;
  position: relative;
}
.black-theme .card .card__top img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.black-theme .card .card__top .profile__photo {
  width: 130px;
  height: 130px;
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translatex(-50%);
}
.black-theme .card .card__top .profile__photo img {
  width: 100%;
  border-radius: 50%;
  height: 100%;
  object-fit: cover;
  border: 7px solid rgba(0, 0, 0, 0.35);
}
.black-theme .card .card__content {
  text-align: center;
  color: #fff;
  padding: 5em 2.5em;
}
.black-theme .card .card__content h2 {
  font-weight: 700;
  font-size: 24px;
}
.black-theme .card .card__content h3 {
  font-weight: 400;
  margin: 5px 0 30px;
  font-size: 16px;
}
.black-theme .card .card__content p {
  text-align: left;
}
.black-theme .card .card__content p span {
  margin-right: 10px;
}
.black-theme .card .card__content p a {
  text-decoration: none;
  color: #fff;
}
.black-theme .card .card__content p a:hover {
  text-decoration: underline;
}
.black-theme .card .card__content p + p {
  margin-top: 10px;
}
.black-theme .card a.button {
  text-decoration: none;
  color: #fff;
  background: rgba(0, 0, 0, 0.85);
  padding: 9px 30px 10px 30px;
  display: inline-block;
  margin-top: 2em;
}
.black-theme .card a.button:hover {
  background: rgba(0, 0, 0, 0.7);
}

.white-theme {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #3fe2f2;
  background-image: linear-gradient(135deg, #3fe2f2 0%, #43dbc0 16%, #29b7f2 49%, #3cabe8 86%);
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  font-family: "Lato", sans-serif;
  letter-spacing: 0.5px;
  font-weight: 400;
}
.white-theme:before {
  position: absolute;
  content: "";
  left: 40%;
  bottom: -40%;
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, #3fe2f2 0%, #43dbc0 24%, #3cabe8 91%);
  border-radius: 50%;
}
.white-theme .card {
  width: 350px;
  height: 500px;
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  backdrop-filter: blur(4px);
  border-radius: 10px;
  overflow: hidden;
}
.white-theme .card .card__top {
  height: 155px;
  position: relative;
}
.white-theme .card .card__top img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.white-theme .card .card__top .profile__photo {
  width: 130px;
  height: 130px;
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translatex(-50%);
}
.white-theme .card .card__top .profile__photo img {
  width: 100%;
  border-radius: 50%;
  height: 100%;
  object-fit: cover;
  border: 8px solid rgba(255, 255, 255, 0.55);
}
.white-theme .card .card__content {
  text-align: center;
  color: rgba(0, 0, 0, 0.85);
  padding: 5em 2.5em;
}
.white-theme .card .card__content h2 {
  font-weight: 700;
  font-size: 24px;
}
.white-theme .card .card__content h3 {
  font-weight: 400;
  margin: 5px 0 30px;
  font-size: 16px;
}
.white-theme .card .card__content p {
  text-align: left;
}
.white-theme .card .card__content p span {
  margin-right: 10px;
}
.white-theme .card .card__content p a {
  text-decoration: none;
  color: rgba(0, 0, 0, 0.85);
}
.white-theme .card .card__content p a:hover {
  text-decoration: underline;
}
.white-theme .card .card__content p + p {
  margin-top: 10px;
}
.white-theme .card a.button {
  text-decoration: none;
  color: #fff;
  background: rgba(0, 0, 0, 0.85);
  padding: 9px 30px 10px 30px;
  display: inline-block;
  margin-top: 2em;
}
.white-theme .card a.button:hover {
  background: rgba(0, 0, 0, 0.7);
}

#switch {
  position: absolute;
  top: 35px;
  right: 35px;
  background: #fff;
  border-radius: 50px;
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
#switch:hover i {
  animation: rotation 1.5s linear forwards infinite;
}
#switch i {
  font-size: 1.5rem;
}
@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}