* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: #fff;

  background:
    linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55)),
    url("img/background.webp");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.hero {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 30px;
}

.hero-content {
  max-width: 850px;
  animation: fadeUp 1s ease both;
}

.logo-mark {
  font-size: 4rem;
  margin-bottom: 10px;
  color: #8bc34a;
}

.brand {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: 10px;
  font-weight: 300;
}

.subtitle {
  margin: 10px 0 60px;
  font-size: 1.6rem;
  letter-spacing: 12px;
  color: #8bc34a;
}

h1 {
  margin: 0 0 25px;
  font-size: clamp(2.3rem, 6vw, 5rem);
  text-transform: uppercase;
  font-weight: 800;
}

.text {
  max-width: 720px;
  margin: 0 auto;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.6;
}

.thanks {
  margin: 25px 0 35px;
  font-size: 2rem;
  color: #8bc34a;
  font-style: italic;
}

.btn {
  display: inline-block;
  padding: 15px 38px;
  background: #7fb33d;
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 700;
  transition: 0.3s;
}

.btn:hover {
  background: #6aa12f;
  transform: translateY(-2px);
}

.email {
  margin-top: 18px;
}

.email a {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
}

.email a:hover {
  text-decoration: underline;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(25px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 600px) {
  body {
    background-attachment: scroll;
  }

  .brand {
    letter-spacing: 5px;
  }

  .subtitle {
    letter-spacing: 6px;
    margin-bottom: 40px;
  }

  .thanks {
    font-size: 1.5rem;
  }
}