* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-weight: 300;
}

body {
  font-family: 'Source Sans Pro', sans-serif;
  color: white;
  font-weight: 300;
}

body input::placeholder {
  color: white;
  font-weight: 300;
}

.wrapper {
  background: linear-gradient(to bottom right, #50a3a2 0%, #53e3a6 100%);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wrapper.form-success h1 {
  transform: translateY(85px);
}

.container {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.container h1 {
  font-size: 40px;
  transition: all 1s ease-in-out;
  font-weight: 200;
}

form {
  padding: 20px 0;
  position: relative;
  z-index: 2;
}

form input {
  display: block;
  outline: 0;
  /* MODIFICACIÓN: Borde eliminado */
  border: none;
  background-color: rgba(255, 255, 255, 0.2);
  width: 250px;
  border-radius: 3px;
  padding: 10px 15px;
  margin: 0 auto 10px auto;
  text-align: center;
  font-size: 18px;
  color: white;
  transition: all 0.25s;
  font-weight: 300;
}

form input:hover {
  background-color: rgba(255, 255, 255, 0.4);
}

form input:focus {
  background-color: white;
  width: 300px;
  color: #53e3a6;
}

form button {
  outline: 0;
  background-color: white;
  border: 0;
  padding: 10px 15px;
  color: #53e3a6;
  border-radius: 3px;
  width: 250px;
  cursor: pointer;
  font-size: 18px;
  transition: all 0.25s;
}

form button:hover {
  background-color: rgb(245, 247, 249);
}

.bg-bubbles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.bg-bubbles li {
  position: absolute;
  list-style: none;
  display: block;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.15);
  bottom: -160px;
  animation: square 25s infinite linear;
}

/* ... (el resto de las reglas de .bg-bubbles li y @keyframes son las mismas) ... */
.bg-bubbles li:nth-child(1) {
  left: 10%;
}

.bg-bubbles li:nth-child(2) {
  left: 20%;
  width: 80px;
  height: 80px;
  animation-delay: 2s;
  animation-duration: 17s;
}

.bg-bubbles li:nth-child(3) {
  left: 25%;
  animation-delay: 4s;
}

.bg-bubbles li:nth-child(4) {
  left: 40%;
  width: 60px;
  height: 60px;
  animation-duration: 22s;
  background-color: rgba(255, 255, 255, 0.25);
}

.bg-bubbles li:nth-child(5) {
  left: 70%;
}

.bg-bubbles li:nth-child(6) {
  left: 80%;
  width: 120px;
  height: 120px;
  animation-delay: 3s;
  background-color: rgba(255, 255, 255, 0.2);
}

.bg-bubbles li:nth-child(7) {
  left: 32%;
  width: 160px;
  height: 160px;
  animation-delay: 7s;
}

.bg-bubbles li:nth-child(8) {
  left: 55%;
  width: 20px;
  height: 20px;
  animation-delay: 15s;
  animation-duration: 40s;
}

.bg-bubbles li:nth-child(9) {
  left: 25%;
  width: 10px;
  height: 10px;
  animation-delay: 2s;
  animation-duration: 40s;
  background-color: rgba(255, 255, 255, 0.3);
}

.bg-bubbles li:nth-child(10) {
  left: 90%;
  width: 160px;
  height: 160px;
  animation-delay: 11s;
}

@keyframes square {
  0% {
    transform: translateY(0);
  }

  100% {
    transform: translateY(-700px) rotate(600deg);
  }
}