* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #1f2937;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  background:
    linear-gradient(135deg, rgba(43, 108, 176, 0.14), rgba(21, 128, 61, 0.08)),
    #f4f8fb;
}

header {
  padding: 42px 24px;
  text-align: center;
  color: white;
  background: linear-gradient(135deg, #1f4e79, #2b6cb0);
  border-bottom: 5px solid #38a169;
}

header h1 {
  margin: 0 0 10px;
  font-size: 2.4rem;
}

header p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
}

nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 14px 20px;
  background-color: white;
  border-bottom: 1px solid #d9e2ec;
  box-shadow: 0 4px 14px rgba(31, 78, 121, 0.08);
}

nav a {
  color: #1f4e79;
  font-weight: bold;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
}

nav a:hover,
nav a:focus {
  color: white;
  background-color: #2b6cb0;
}

nav a:focus,
a:focus {
  outline: 3px solid rgba(56, 161, 105, 0.35);
  outline-offset: 2px;
}

main {
  width: min(100% - 32px, 1050px);
  margin: 32px auto;
}

section {
  margin-bottom: 28px;
  padding: 24px;
  background-color: white;
  border: 1px solid #d9e2ec;
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(31, 78, 121, 0.08);
}

h2 {
  margin-top: 0;
  color: #1f4e79;
  border-bottom: 2px solid #38a169;
  padding-bottom: 8px;
}

p {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 0 0 1px #d9e2ec;
}

th, td {
  border: 1px solid #d9e2ec;
  padding: 12px;
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}

th {
  background-color: #2b6cb0;
  color: white;
}

td:first-child {
  width: 32%;
  color: #1f4e79;
  font-weight: bold;
}

tr:nth-child(even) {
  background-color: #f4f8fb;
}

ul {
  display: grid;
  gap: 14px;
  padding-left: 0;
  list-style: none;
}

li {
  padding: 16px;
  background-color: #f8fbfd;
  border-left: 5px solid #38a169;
  border-radius: 6px;
}

a {
  color: #2b6cb0;
}

a:hover,
a:focus {
  color: #1f4e79;
}

footer {
  padding: 20px;
  text-align: center;
  color: white;
  background-color: #1f2937;
}

footer p {
  margin: 0;
}

@media (max-width: 700px) {
  header {
    padding: 32px 18px;
  }

  header h1 {
    font-size: 2rem;
  }

  nav {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  main {
    width: min(100% - 20px, 1050px);
    margin: 20px auto;
  }

  section {
    padding: 18px;
  }

  table,
  tbody,
  tr,
  th,
  td {
    display: block;
    width: 100%;
  }

  th {
    display: none;
  }

  tr {
    border-bottom: 1px solid #d9e2ec;
  }

  tr:first-child {
    border-bottom: 0;
  }

  td {
    border-bottom: 0;
  }

  td:first-child {
    width: 100%;
    padding-bottom: 4px;
  }
}