* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: #3e5164;
  color: #fff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.ss-panel { width: min(420px, 100%); text-align: center; color: #fff; }
.ss-title { font-size: 22px; font-weight: 700; margin: 0 0 8px; color: #fff; }
.ss-hint { opacity: 0.85; margin: 0 0 16px; font-size: 15px; }
.ss-dots { font-size: 28px; letter-spacing: 0.3em; margin: 0 0 12px; color: #fff; }
.ss-err { color: #ffd6d6; min-height: 1.2em; }
.ss-pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.ss-pad button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  background: #5b7084;
  color: #fff;
  border: 0;
  border-radius: 2px;
  font-size: 22px;
  font-weight: 700;
  font-family: inherit;
  line-height: 1;
}