* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #f4f5f7;
  color: #1f2328;
  line-height: 1.5;
}

.container {
  max-width: 640px;
  margin: 3rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

h1 {
  margin-top: 0;
  font-size: 1.5rem;
}

form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

label {
  width: 100%;
  font-weight: 600;
}

input {
  flex: 1;
  min-width: 280px;
  padding: 0.5rem 0.75rem;
  border: 1px solid #d0d7de;
  border-radius: 6px;
  font: inherit;
}

button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  background: #0969da;
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: #0757b0;
}

.error {
  margin: 1rem 0 0;
  padding: 0.75rem;
  border-radius: 6px;
  background: #ffebe9;
  border: 1px solid #d1242f;
  color: #82071e;
}

.notice {
  margin: 1rem 0 0;
  padding: 0.75rem;
  border-radius: 6px;
  background: #fff8c5;
  border: 1px solid #d4a72c;
  color: #6a4a00;
}

#result {
  margin-top: 1rem;
}

table.details {
  width: 100%;
  border-collapse: collapse;
}

table.details th,
table.details td {
  padding: 0.5rem 0.75rem;
  border: 1px solid #d0d7de;
  text-align: left;
}

table.details th {
  width: 40%;
  background: #f6f8fa;
  font-weight: 600;
}

.error {
  margin: 1rem 0 0;
  padding: 0.75rem;
  border-radius: 6px;
  background: #ffebe9;
  border: 1px solid #d1242f;
  color: #82071e;
}

#result {
  margin-top: 1rem;
}

pre {
  padding: 1rem;
  overflow-x: auto;
  background: #0d1117;
  color: #e6edf3;
  border-radius: 6px;
  font-size: 0.875rem;
}