* {
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  margin: 0;
  min-height: 100vh;
  line-height: 1.55;
  color: #2a2a2a;
  background: #e8edf2;
}

.page-header {
  background: #3d5a80;
  color: #f8fafc;
  padding: 1.75rem 1.25rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.page-header h1 {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.content {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 2.5rem;
}

.panel {
  background: #fff;
  border-radius: 10px;
  padding: 1.25rem 1.35rem 1.4rem;
  margin-bottom: 1.1rem;
  border: 1px solid #d6dee6;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: #3d5a80;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid #c8d4e0;
}

.panel p,
.panel div {
  margin: 0;
  font-size: 0.95rem;
}

.panel div p {
  margin: 0 0 0.65rem;
}

.panel div p:last-child {
  margin-bottom: 0;
}

#dateOutput {
  font-size: 1.05rem;
  font-weight: 500;
  color: #1e3a5f;
}

.panel code {
  font-size: 0.9em;
  background: #eef2f7;
  padding: 0.12em 0.4em;
  border-radius: 4px;
}