body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #0b0b0b;
  color: #e0e0e0;
}

header {
  background: linear-gradient(to right, #400000, #800000);
  padding: 2rem;
  text-align: center;
}

header h1 {
  font-size: 3rem;
  color: #ff2a2a;
  text-shadow: 0 0 10px #ff0000;
}

.tagline {
  font-style: italic;
  color: #ccc;
}

nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  background: #1a1a1a;
  padding: 1rem;
}

nav a {
  color: #ff4d4d;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}

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

section {
  margin-bottom: 3rem;
}

h2 {
  color: #ff4d4d;
  border-bottom: 1px solid #ff4d4d;
  padding-bottom: 0.5rem;
}

ul {
  list-style: square;
  padding-left: 1.5rem;
}

img {
  max-width: 100%;
  border: 2px solid #ff4d4d;
  box-shadow: 0 0 10px #ff0000;
}

.download-btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: #ff2a2a;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  box-shadow: 0 0 10px #ff0000;
}

.download-btn:hover {
  background: #cc0000;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #1a1a1a;
  color: #888;
}

@keyframes pulse {
  0%   { transform: scale(1); text-shadow: 0 0 10px #ff0000; color: #ff2a2a; }
  50%  { transform: scale(1.2); text-shadow: 0 0 25px #ff0000; color: #ff4d4d; }
  100% { transform: scale(1); text-shadow: 0 0 10px #ff0000; color: #ff2a2a; }
}

.pulsing {
  animation: pulse 1.5s ease-in-out;
}