:root {
  color-scheme: light dark;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--tg-theme-bg-color, #fff);
  color: var(--tg-theme-text-color, #17212b);
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 16px; line-height: 1.5; }
main { max-width: 640px; margin: auto; padding: 24px 20px calc(28px + env(safe-area-inset-bottom)); }
h1 { font-size: 24px; line-height: 1.25; margin: 0 0 16px; }
h2 { font-size: 20px; }
p { margin: 12px 0; }
a { color: var(--tg-theme-link-color, #1675b6); }
details { margin: 24px 0; padding-bottom: 8px; }
summary { font-weight: 600; cursor: pointer; }
ol { padding-left: 22px; }
li { padding: 4px 0; }
form { display: flex; flex-direction: column; gap: 8px; }
label { margin-top: 8px; font-weight: 500; }
input { width: 100%; min-width: 0; min-height: 44px; font: inherit; padding: 10px 12px;
  color: inherit; background: var(--tg-theme-secondary-bg-color, #f1f3f5);
  border: 1px solid var(--tg-theme-hint-color, #768392); border-radius: 8px; }
input:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--tg-theme-link-color, #1675b6); outline-offset: 2px;
}
.note { color: var(--tg-theme-hint-color, #56616c); }
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 12px 0; }
.consent input { width: 20px; min-height: 20px; height: 20px; margin: 3px 0 0; flex-shrink: 0; }
button { width: 100%; min-height: 48px; margin: 12px 0; padding: 12px; border: 0; border-radius: 8px;
  font: inherit; font-weight: 600; cursor: pointer; background: var(--tg-theme-button-color, #1675b6);
  color: var(--tg-theme-button-text-color, #fff); }
button:disabled { opacity: .6; cursor: wait; }
#error { color: #c93d3d; padding: 12px 0; }
[hidden] { display: none !important; }
@media (prefers-color-scheme: dark) {
  :root { background: var(--tg-theme-bg-color, #17212b); color: var(--tg-theme-text-color, #f5f5f5); }
  input { background: var(--tg-theme-secondary-bg-color, #242f3d); }
  .note { color: var(--tg-theme-hint-color, #b1bac4); }
  #error { color: #ff9696; }
}