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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f5f5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Nav */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 2rem;
  width: 100%;
}

header {
  background: #fff;
  border-bottom: 1px solid #ddd;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: #1a1a1a;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav a {
  text-decoration: none;
  color: #555;
}

nav a.active {
  color: #1a1a1a;
  font-weight: 600;
}

nav a:hover {
  color: #1a1a1a;
}

/* Main */
main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

.hero {
  text-align: center;
  padding: 3rem 0;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.hero p {
  color: #555;
  font-size: 1.1rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 1.5rem;
}

.card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: #555;
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem;
  color: #888;
  font-size: 0.9rem;
  border-top: 1px solid #ddd;
  background: #fff;
}