body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #121212;
  color: #f1f1f1;
}

.hero {
  background: linear-gradient(rgba(18, 18, 18, 0.8), rgba(18, 18, 18, 0.8)),
              url('images/hero.jpg') center/cover no-repeat;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}

.hero-overlay {
  background-color: rgba(0, 0, 0, 0.7);
  padding: 2rem;
  border-radius: 12px;
  max-width: 600px;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.btn,
.upload-label,
button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.75rem 1.5rem;
  background-color: #1e88e5;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}

section {
  padding: 2rem;
  max-width: 800px;
  margin: auto;
}

ul,
ol {
  padding-left: 1.5rem;
}

form input,
form button {
  margin: 0.5rem 0;
  padding: 0.5rem;
  width: 100%;
  max-width: 400px;
  display: block;
  border-radius: 6px;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  background-color: #1f1f1f;
  color: #aaa;
}

#preview img {
  margin-top: 1rem;
  max-width: 100%;
  border-radius: 8px;
}