body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1a1a1a;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  border-bottom: 1px solid #ddd;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
}

.layout {
  display: flex;
  gap: 2rem;
}

.layout main {
  flex: 3;
}

.layout aside {
  flex: 1;
  border-left: 1px solid #ddd;
  padding-left: 1rem;
}

.session-status {
  font-size: 0.9rem;
  color: #555;
}

.button-to {
  display: inline;
}

.button-to button {
  background: none;
  border: none;
  color: #b00020;
  cursor: pointer;
  padding: 0;
  font: inherit;
  text-decoration: underline;
}

.flash-notice {
  background: #eef7ee;
  border: 1px solid #bcd8bc;
  padding: 0.5rem 0.75rem;
  margin-bottom: 1rem;
}