* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: sans-serif;
  background: #f5f5f5;
  color: #333;
}
.gnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #123458;
  color: #fff;
  position: sticky;
  top: 0;
}
.gnav .logo {
  font-size: 1.5rem;
  font-weight: bold;
}
.gnav nav a {
  margin-left: 1rem;
  color: #fff;
  text-decoration: none;
}
.exams-list {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.exams-list h1 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
}
.exams-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.exam-card {
  background: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
}
.exam-card h3 {
  margin-bottom: 0.5rem;
  color: #123458;
  font-size: 1.1rem;
}
.exam-card p {
  flex-grow: 1;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}
.exam-card .min-score {
  font-weight: bold;
  margin-bottom: 1rem;
}
.exam-card button {
  align-self: flex-end;
  background: #0066cc;
  border: none;
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  cursor: pointer;
}