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

body {
  font-family: 'Inter', sans-serif;
  background: #0f172a;
  color: #f1f5f9;
  padding: 2rem 1rem;
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

header {
  margin-bottom: 2rem;
  max-width: 800px;
}

h1 {
  font-size: 3rem;
  color: #38bdf8;
  margin-bottom: 0.5rem;
}

p {
  font-size: 1.25rem;
  color: #cbd5e1;
}

.section {
  background: #1e293b;
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  max-width: 1000px;
  width: 100%;
}

h2 {
  color: #7dd3fc;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 1.1rem;
  text-align: left;
}

th, td {
  padding: 1rem;
}

th {
  background: #334155;
  color: #f8fafc;
}

tr:nth-child(even) {
  background: #2d3748;
}

.tip {
  background: #0ea5e9;
  color: #f8fafc;
  padding: 1.5rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 1.1rem;
}

footer {
  font-size: 1rem;
  color: #94a3b8;
  margin-top: 3rem;
  text-align: center;
  max-width: 800px;
}

/* Responsive adjustments for phones */
@media (max-width: 600px) {
  h1 {
    font-size: 2.2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  p, .tip, table {
    font-size: 1rem;
  }

  .section {
    padding: 1.25rem;
  }

  th, td {
    padding: 0.75rem;
  }
}