/* Base styling */
body {
  background-color: #000;
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  margin: 0;
}
.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
}

/* Headline and tagline styling */
h1 {
  font-size: 2.5em;
  color: #39ff14;                    /* Neon lime green */
  text-shadow: 0 0 5px #39ff14;      /* Glow effect */
  margin: 0 0 10px;
}
.tagline {
  font-size: 1.2em;
  color: #D300FF;                    /* Neon purple */
  text-shadow: 0 0 5px #D300FF;
  margin: 0 0 30px;
}

/* Launch message styling */
.message {
  font-size: 1em;
  margin-bottom: 30px;
  padding: 0 15px;
}

/* Email sign-up form styling */
form {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 30px;
}
input[type="email"] {
  width: 100%;
  padding: 10px;
  font-size: 1em;
  border: 2px solid #555;
  border-radius: 4px;
  background: transparent;
  color: #fff;
  box-sizing: border-box;
  margin-bottom: 10px;
}
input::placeholder {
  color: #aaa;
}
input[type="email"]:focus {
  outline: none;
  border-color: #D300FF;
  box-shadow: 0 0 5px #D300FF;
}
input[type="email"]:focus:invalid {
  border-color: #e74c3c;
  box-shadow: 0 0 5px #e74c3c;
}
input[type="email"]:focus:valid {
  border-color: #39ff14;
  box-shadow: 0 0 5px #39ff14;
}
button {
  padding: 10px 20px;
  font-size: 1em;
  border: none;
  border-radius: 4px;
  background-color: #D300FF;
  color: #fff;
  cursor: pointer;
}
button:hover {
  background-color: #39ff14;
  color: #000;
}

/* Responsive layout for larger screens */
@media (min-width: 600px) {
  form {
    flex-direction: row;
    justify-content: center;
  }
  input[type="email"] {
    flex: 1;
    margin-right: 10px;
    margin-bottom: 0;
  }
  button {
    margin: 0;
  }
}