:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  background: #f5f7fb;
  color: #172033;
}

@media (prefers-color-scheme: dark) {
  :root { background: #10131a; color: #eef1f7; }
  .card { background: #1a1f2a; border-color: #2e3747; }
  a { color: #9bc1ff; }
}

body { margin: 0; }
main { max-width: 820px; margin: 0 auto; padding: 48px 20px 72px; }
header { margin-bottom: 36px; }
h1 { margin: 0 0 8px; font-size: 2.2rem; letter-spacing: -0.03em; }
h2 { margin-top: 32px; font-size: 1.25rem; }
p { margin: 12px 0; }
a { color: #1459c7; }
.muted { color: #667085; }
@media (prefers-color-scheme: dark) { .muted { color: #aab3c2; } }
.card { background: #fff; border: 1px solid #e2e7f0; border-radius: 18px; padding: 24px; margin: 18px 0; }
.lang { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 640px) { .lang { grid-template-columns: 1fr; gap: 8px; } }
footer { margin-top: 44px; font-size: .9rem; }
nav a { margin-right: 18px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.demo-steps { padding-left: 1.5rem; }
.demo-steps li { margin: 8px 0; }
.demo-details { margin: 20px 0; }
.demo-details div { display: grid; grid-template-columns: minmax(130px, 0.35fr) 1fr; gap: 14px; padding: 8px 0; border-bottom: 1px solid #e2e7f0; }
.demo-details dt { font-weight: 600; }
.demo-details dd { margin: 0; overflow-wrap: anywhere; }
.demo-code { overflow-wrap: anywhere; word-break: break-word; }
.demo-input { box-sizing: border-box; width: 100%; min-height: 44px; margin-top: 8px; padding: 9px 11px; border: 1px solid #c8d1df; border-radius: 10px; background: #fff; color: inherit; font: inherit; }
.demo-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 16px; }
.demo-button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; box-sizing: border-box; padding: 9px 14px; border: 1px solid #1459c7; border-radius: 10px; background: #1459c7; color: #fff; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.demo-button:hover { background: #0e47a2; color: #fff; }
.demo-button-secondary { border-color: #9aa8bb; background: transparent; color: inherit; }
.demo-button-secondary:hover { background: #edf2f8; color: inherit; }
.demo-note { color: #667085; font-size: .95rem; }
.demo-status { min-height: 1.6em; margin-bottom: 0; color: #1459c7; font-weight: 600; }
.demo-check { margin-top: 18px; }
@media (prefers-color-scheme: dark) {
  .demo-details div { border-color: #2e3747; }
  .demo-input { border-color: #3a4659; background: #111722; }
  .demo-button-secondary:hover { background: #273143; }
  .demo-status { color: #9bc1ff; }
}
@media (max-width: 640px) {
  .demo-details div { grid-template-columns: 1fr; gap: 3px; }
  .demo-button { width: 100%; }
}