* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: auto;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    overflow: auto;
    background: linear-gradient(315deg, rgb(0, 0, 0) 3%, rgb(8, 71, 50) 38%, rgb(0, 0, 0) 68%, rgb(0, 0, 0) 98%);
    animation: gradient 15s ease infinite;
    background-size: 400% 400%;
    background-attachment: fixed;
}

@keyframes gradient {
    0% {
        background-position: 0% 0%;
    }
    50% {
        background-position: 100% 100%;
    }
    100% {
        background-position: 0% 0%;
    }
}

.wave {
    background: rgb(255 255 255 / 25%);
    border-radius: 1000% 1000% 0 0;
    position: fixed;
    width: 200%;
    height: 12em;
    animation: wave 10s -3s linear infinite;
    transform: translate3d(0, 0, 0);
    opacity: 0.8;
    bottom: 0;
    left: 0;
    z-index: -1;
}

.wave:nth-of-type(2) {
    bottom: -1.25em;
    animation: wave 18s linear reverse infinite;
    opacity: 0.8;
}

.wave:nth-of-type(3) {
    bottom: -2.5em;
    animation: wave 20s -1s reverse infinite;
    opacity: 0.9;
}

@keyframes wave {
    2% {
        transform: translateX(1);
    }

    25% {
        transform: translateX(-25%);
    }

    50% {
        transform: translateX(-50%);
    }

    75% {
        transform: translateX(-25%);
    }

    100% {
        transform: translateX(1);
    }
}

.login-container {
  background-color: rgba(41, 41, 41, 0.7); /* cinza com 70% de opacidade */
  padding: 40px;
  box-shadow: 0 10px 25px rgba(255, 255, 255, 0.034);
  width: 100%;
  max-width: 700px;
}

.login-container h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #ffffffc4;
}

form label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: #f7f7f7;
}

form input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
  transition: border 0.3s;
}

form input:focus {
  border-color: rgb(14, 235, 161);
  outline: none;
}

form button {
  width: 100%;
  padding: 12px;
  background-color: rgb(8, 56, 39);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

form button:hover {
  background-color: #18b478;
}

.signup {
  color: white;
  text-align: center;
  margin-top: 15px;
  font-size: 14px;
}

.signup a {
  color: rgb(14, 235, 161);
  text-decoration: none;
  font-weight: bold;
}

 .back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    background-color: #4444447a;
    color: #fff;
    border: none;
    border-radius: 100%;
    padding: 10px 15px;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.3s;
  }

  .back-button:hover {
    background-color: #666;
  }