* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #ffffff;
  color: #111111;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.content {
  padding: 48px 24px 24px;
  text-align: center;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-card {
  max-width: 720px;
  width: 100%;
  background: #ffffff;
  border: 1px solid #e5e5e5;
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.code {
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  color: #111111;
}

.title {
  font-size: 1.75rem;
  margin: 0 0 12px;
  font-weight: 600;
  color: #111111;
}

.message {
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 16px;
  color: #333333;
}

.site-footer {
  background: #ffffff;
  color: #000000;
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  padding: 24px 16px;
  box-sizing: border-box;
  width: 100%;
}

.footer-inner { display: inline-block; text-align: center; max-width: 900px; }
.footer-inner a { color: inherit; text-decoration: none; }
.footer-item { margin: 6px 0; }