html, body {
    height: 100%;
}

body {
  font-family: 'Exo 2', sans-serif;
  font-size: 1.5vh;
  line-height: 1.5;
  display: flex;
  justify-content: center;
  background-color: #1f1f1f;
  margin: 0; /* Added to remove default body margin */
  overflow:hidden;
}

@media (min-width: 768px) {
  body {
    overflow: hidden;
  }
}

header {
  text-align: center;
  box-sizing: border-box;
  margin: 0 auto;
}

header h1 {
  font-size: 2.5vh;
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 1rem;
  color: #fff;
  font-family: 'Segoe UI', sans-serif;
}

.modern-button {
  border: none;
  padding: 15px; /* Combined padding properties */
  margin: 5px;
  font-size: 18px;
  color: #ddd;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
  text-decoration: none;
  text-align: center;
}

.modern-button:hover {
    transform: scale(1.05);
}

.vertical-table {
  display: flex;
  flex-direction: column;
  grid-auto-rows: auto; /* each section gets its own row */
  row-gap: 1rem;        /* optional spacing */
  max-width: -webkit-fill-available;
}