* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f3f7fa;
  color: #17324d;
}
.page { max-width: 900px; margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; }
header {
  background: #0f4c75;
  color: white;
  padding: 24px 28px;
  border-radius: 0 0 14px 14px;
  text-align: center;
}
.brand { font-size: 28px; font-weight: 700; letter-spacing: .2px; }
.title { margin-top: 6px; font-size: 20px; font-weight: 600; }
main { padding: 24px; flex: 1; }
.card {
  background: white;
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 18px;
  box-shadow: 0 3px 12px rgba(0,0,0,.07);
}
h2 { margin: 0 0 20px; font-size: 22px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
label { font-weight: 600; font-size: 15px; }
input, select {
  width: 100%;
  margin-top: 8px;
  padding: 12px 13px;
  border: 1px solid #b9c7d3;
  border-radius: 8px;
  font-size: 16px;
  background: white;
}
input:focus, select:focus { outline: 2px solid #76a9c8; border-color: #0f4c75; }
button {
  margin-top: 22px;
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 8px;
  background: #0f4c75;
  color: white;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
.message { min-height: 24px; margin-top: 12px; font-size: 14px; font-weight: 600; }
.outputs { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.output-box {
  border: 1px solid #d6e0e7;
  border-radius: 10px;
  padding: 18px;
  background: #f8fbfd;
}
.output-box.wide { grid-column: 1 / -1; }
.output-box span { display: block; font-size: 14px; color: #5c6e7d; }
.output-box strong { display: block; margin-top: 8px; font-size: 28px; color: #0f4c75; }
.note { font-size: 13px; color: #5b6a75; line-height: 1.5; margin: 4px 4px 18px; }
footer { text-align: center; padding: 18px; color: #607383; font-size: 13px; }
@media (max-width: 650px) {
  main { padding: 16px; }
  .grid, .outputs { grid-template-columns: 1fr; }
  .output-box.wide { grid-column: auto; }
  header { padding: 20px 16px; }
  .brand { font-size: 24px; }
}