body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #172033;
}
header {
  padding: 22px 5%;
  background: #fff;
  border-bottom: 1px solid #ddd;
  display: flex;
  justify-content: space-between;
}
main {
  max-width: 1200px;
  margin: 25px auto;
  padding: 0 20px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.cards div,
.panel {
  background: #fff;
  padding: 20px;
  border: 1px solid #e1e5ed;
  border-radius: 10px;
  margin-bottom: 20px;
}
.cards b,
.cards small {
  display: block;
}
.cards b {
  font-size: 30px;
  margin-top: 8px;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th,
td {
  padding: 10px;
  border-bottom: 1px solid #eee;
  text-align: left;
}
tr[data-email] {
  cursor: pointer;
}
select {
  padding: 10px;
  min-width: 260px;
}
pre {
  white-space: pre-wrap;
  background: #f5f6f8;
  padding: 12px;
  border-radius: 8px;
}
@media (max-width: 700px) {
  .cards {
    grid-template-columns: 1fr;
  }
}