:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #8fbdf3f0;
  --highlight: #e94560;
  --text: #f5f6fa;
  --muted: #a0a4b8;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.15);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
  background: var(--primary);
  color: var(--text);
  min-height: 100vh;
}
header {
  background: var(--secondary);
  box-shadow: var(--shadow);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav {
  display: flex;
  gap: 2rem;
}
nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.1rem;
  transition: color 0.2s;
  position: relative;
}
nav a.active, nav a:hover {
  color: #ff7a95;
}
nav a.active::after, nav a:hover::after {
  content: '';
  display: block;
  height: 2px;
  background: #ff7a95;
  width: 100%;
  position: absolute;
  left: 0;
  bottom: -4px;
}
main {
  max-width: 900px;
  margin: 2rem auto;
  background: var(--secondary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
}
section {
  margin-bottom: 2.5rem;
}
h1, h2, h3 {
  color: var(--highlight);
  margin-top: 0;
}
p, li {
  color: var(--text);
  line-height: 1.7;
}
.button {
  background: var(--highlight);
  color: var(--text);
  border: none;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background 0.2s;
}
.button:hover {
  background: var(--accent);
}
.card {
  background: var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
footer {
  text-align: center;
  color: var(--muted);
  padding: 2rem 0 1rem;
  margin-top: 2rem;
}
footer .heart {
  color: var(--highlight);
}
@media (max-width: 600px) {
  header, main {
    padding: 1rem;
  }
  nav {
    gap: 1rem;
  }
  main {
    padding: 1.5rem 0.5rem;
  }
}