:root { color-scheme: dark; font-family: system-ui, sans-serif; background: var(--tg-theme-bg-color, #17212b); color: var(--tg-theme-text-color, #fff); }
body { margin: 0; padding: 20px; }
main { max-width: 420px; margin: 0 auto; display: grid; gap: 18px; }
h1 { margin: 0; font-size: 24px; }
.status { margin: 0; color: var(--tg-theme-hint-color, #8f9aa7); }
button { min-height: 48px; border: 0; border-radius: 12px; font: inherit; font-weight: 650; color: var(--tg-theme-button-text-color, #fff); background: var(--tg-theme-button-color, #3390ec); }
button:disabled, input:disabled { opacity: .5; }
section { display: grid; gap: 10px; }
label { display: flex; justify-content: space-between; }
input { width: 100%; accent-color: var(--tg-theme-button-color, #3390ec); }
#error { min-height: 1.4em; margin: 0; color: #ff7b7b; }