:root {
  --navy: #0b2e4a;
  --blue: #1f6f9f;
  --light: #f5f8fb;
  --text: #1f2933;
  --muted: #5f6b76;
  --border: #d9e2ec;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: white;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  border-bottom: 1px solid var(--border);
  background: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

nav a {
  color: var(--navy);
  text-decoration: none;
  margin-left: 18px;
  font-weight: 600;
}

nav a:hover {
  color: var(--blue);
}

.hero {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: center;
  padding: 48px 0;
}

.hero img {
  width: 260px;
  border-radius: 14px;
}

h1, h2, h3 {
  color: var(--navy);
  line-height: 1.2;
}

.subtitle {
  color: var(--muted);
  font-size: 1.1rem;
}

.button-row {
  margin-top: 20px;
}

.button {
  display: inline-block;
  padding: 10px 16px;
  margin-right: 10px;
  border-radius: 8px;
  background: var(--navy);
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.button.secondary {
  background: var(--light);
  color: var(--navy);
  border: 1px solid var(--border);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin: 20px 0 36px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  background: var(--light);
}

.card h3 {
  margin-top: 0;
}

.alumni-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 30px;
}

.alumni-table th,
.alumni-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

.alumni-table th {
  background: var(--light);
  color: var(--navy);
}

footer {
  margin-top: 50px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 700px) {
  .hero {
    grid-template-columns: 1fr;
  }

  nav {
    display: block;
  }

  nav a {
    display: inline-block;
    margin: 8px 12px 0 0;
  }
}