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

body {
  background-color: #000;
  color: #fff;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100svh;
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

header {
  padding-top: 5rem;
  text-align: center;
}

.logo {
  max-width: 500px;
  width: 100%;
  height: auto;
}

.hero {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 2rem;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background-image: url("assets/hero.png");
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.activities {
  list-style: square;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.activities li {
  font-size: 1.25rem;
  text-transform: uppercase;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-shadow:
    0 0 8px rgba(0, 0, 0, 1),
    0 0 16px rgba(0, 0, 0, 0.9),
    0 0 32px rgba(0, 0, 0, 0.8),
    0 2px 4px rgba(0, 0, 0, 1);
  transition: opacity 0.2s;
}

.activities li:hover {
  opacity: 0.8;
}

.button-group {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  padding: 1rem 2rem;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #000;
  background-color: #fff;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color 0.2s,
    transform 0.2s;
}

.button span {
  display: inline-block;
}

.button:hover {
  background-color: #ddd;
  transform: translateY(-2px);
}

.button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

footer {
  width: 100%;
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-credential {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 0.05em;
}

.footer-credential a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-credential a:hover {
  color: #fff;
}

.footer-info {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.footer-info a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-info a:hover {
  color: #fff;
}

.footer-docs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  align-items: center;
}

.footer-docs a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-docs a:hover {
  color: #fff;
}

.separator {
  color: rgba(255, 255, 255, 0.3);
}

.footer-copyright {
  margin-top: 0.25rem;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 720px), (max-height: 720px) {
  body {
    height: auto;
    max-height: none;
    overflow-y: auto;
  }

  header {
    padding: 2.5rem 2rem 0;
  }

  .logo {
    max-width: 100%;
  }

  .hero {
    padding: 2rem 1.5rem;
  }

  .hero::before {
    opacity: 0.65;
    background-size: cover;
  }

  .hero-content {
    align-items: center;
    text-align: center;
  }

  .activities {
    list-style: none;
    align-items: center;
    gap: 1.5rem;
  }

  .activities li {
    font-size: 1.05rem;
    letter-spacing: 0.08em;
  }

  .button-group {
    width: 100%;
    flex-direction: column;
    align-items: center;
  }

  .button {
    width: min(100%, 320px);
    text-align: center;
  }

  .footer-info,
  .footer-docs {
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer-info .separator,
  .footer-docs .separator {
    display: none;
  }

  .footer-credential,
  .footer-info {
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
}