/* Base layout & font */
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(145deg, #0d1117, #1a1f2b);
  color: #f2f2f2;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

/* Main layout */
main {
  padding: 3rem 1rem;
  max-width: 700px;
  width: 100%;
}

/* Hero card with Bitcoin logo */
.hero-card {
  background: #161b22;
  border: 1px solid #2f2f2f;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  text-align: center;
  margin-bottom: 2rem;
}

.hero-card h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: #f7931a;
}

.hero-card p {
  font-size: 1.1rem;
  line-height: 1.6;
}

/* Bitcoin logo */
.btc-logo {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
}

/* Blog card */
.blog-card {
  background: #0e1218;
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid #2f2f2f;
}

.blog-card h2 {
  color: #f7931a;
  margin-bottom: 1rem;
}

.blog-card ul {
  list-style-type: none;
  padding-left: 0;
}

.blog-card li {
  margin: 0.8rem 0;
  font-size: 1.05rem;
}

a {
  color: #58a6ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Button style */
.button {
  margin-top: 1rem;
  background-color: #f7931a;
  color: #1a1a1a;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  transition: background 0.3s ease;
}

.button:hover {
  background-color: #ffa53d;
}

/* Footer */
footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: #888;
}