:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, "Noto Sans JP", sans-serif;
}

body {
  margin: 0;
  padding: 2rem 1rem;
  background: #f4f7fb;
  color: #172033;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 3rem;
  background: #fff;
  border: 1px solid #d9e1ee;
  border-radius: 0.75rem;
  box-shadow: 0 0.5rem 1.5rem #17203314;
}

h1 {
  margin: 0 0 1.5rem;
}

h2 {
  margin: 2.5rem 0 0.75rem;
}

p {
  margin: 1rem 0;
  line-height: 1.8;
}

.url {
  display: block;
  overflow-wrap: anywhere;
  padding: 1rem;
  background: #eef4ff;
  border-radius: 0.35rem;
}

.error {
  padding: 1rem;
  color: #991b1b;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 0.35rem;
}

label,
input,
button {
  display: block;
  margin-top: 0.75rem;
}

input[type="file"] {
  margin-bottom: 1rem;
  background: #f8fafc;
}

input,
button {
  box-sizing: border-box;
  width: 100%;
  padding: 0.65rem;
}

button {
  cursor: pointer;
  color: #fff;
  background: #2563eb;
  border: 0;
  border-radius: 0.35rem;
}