:root {
  --bg: #0f1020;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: #f5f6fb;
}

.hero {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  padding: 2rem 1.5rem 4rem;
}

.hero.small {
  padding-bottom: 2.5rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 960px;
  margin: 0 auto 3rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-links a {
  color: white;
  text-decoration: none;
  margin-left: 1.5rem;
  opacity: 0.9;
}

.nav-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.hero-content h1 {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.hero-content p {
  font-size: 1.05rem;
  opacity: 0.95;
  margin-bottom: 1.5rem;
}

button#fact-btn {
  background: white;
  color: var(--accent);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease;
}

button#fact-btn:hover {
  transform: translateY(-2px);
}

#fact-output {
  margin-top: 1rem;
  font-style: italic;
  min-height: 1.5rem;
}

.cards {
  max-width: 960px;
  margin: -2.5rem auto 3rem;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.card h2 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.about-content {
  max-width: 700px;
  margin: -2rem auto 3rem;
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.about-content h2 {
  margin-bottom: 1rem;
}

.about-content ul {
  padding-left: 1.25rem;
  line-height: 1.8;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #666;
  font-size: 0.9rem;
}