body {
  display: grid; place-items: center; padding: 24px 16px;
  /* fayans duvar */
  background:
    linear-gradient(var(--grout) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(90deg, var(--grout) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--tile);
}
main { width: 100%; max-width: 380px; display: grid; justify-items: center; }
.sign { font-size: 40px; padding: 8px 30px 10px; border-radius: 10px; box-shadow: inset 0 0 0 3px var(--enamel), inset 0 0 0 5px #fff, 0 6px 0 -2px var(--enamel-deep); position: relative; z-index: 1; margin-bottom: -22px; }
.slip { width: 100%; background: var(--paper); border: 1px solid var(--steel-line); border-radius: var(--r-md); padding: 40px 24px 20px; }
.lead { margin: 0 0 18px; color: var(--ink-2); }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
.slip .btn { width: 100%; margin-top: 22px; min-height: 54px; font-size: 18px; }
.err { color: var(--bad); font-weight: 600; min-height: 1.5em; margin: 12px 0 0; }