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

body {
  background: linear-gradient(to bottom, #0f0f0f, #1a1a1a);
  color: white;
  line-height: 1.6;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

.logo {
  width: 60px;
  margin-bottom: 10px;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.3rem;
}

.tagline {
  color: #33ff99;
  font-size: 1.1rem;
}

.features {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  margin-bottom: 40px;
}

.feature-card {
  background: #2a2a2a;
  padding: 20px;
  border-radius: 12px;
  width: 100%;
  max-width: 600px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.3s ease;
}

.feature-card:hover {
  transform: scale(1.02);
  background: #333;
}

.feature-card h2 {
  font-size: 1.4rem;
  margin-bottom: 5px;
}

.feature-card p {
  color: #ccc;
  font-size: 0.95rem;
}

.detail {
  margin-top: 10px;
  display: none;
  font-size: 0.95rem;
  color: #8fffcf;
}

.form-section {
  text-align: center;
  margin-top: 40px;
}

.form-section h2 {
  margin-bottom: 10px;
  font-size: 1.3rem;
}

form input[type="email"] {
  padding: 10px;
  width: 250px;
  border-radius: 6px;
  border: none;
  margin-right: 10px;
}

form button {
  background-color: #33ff99;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

form button:hover {
  background-color: #2ee08f;
}

footer {
  margin-top: 60px;
  text-align: center;
  font-size: 0.9rem;
  color: #888;
}