body {
  font-family: system-ui, sans-serif;
  margin: 0;
  color: #1a1a1a;
  background: #fafafa;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: #1a1a1a;
  color: #fff;
}
header .brand {
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}
header nav a { color: #fff; text-decoration: none; }
header nav a:hover { text-decoration: underline; }
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}
table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #ddd; }
.msg { padding: 0.75rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.msg.error { background: #fdecea; color: #7a1414; border: 1px solid #f5b3ac; }
.msg.warning { background: #fff4e0; color: #7a4c00; border: 1px solid #ffd98a; }
.msg.success { background: #e6f4ea; color: #16512b; border: 1px solid #a6dcb5; }
.button, button.button {
  display: inline-block;
  background: #1a1a1a;
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
}
.link, button.link {
  background: none;
  border: none;
  color: #1a6fc9;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.field { margin-bottom: 0.9rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.25rem; }
.field.has-error { color: #7a1414; }
.field small { display: block; color: #666; }
pre { overflow-x: auto; background: #f0f0f0; padding: 0.75rem; border-radius: 4px; }