.demo-card {
  width: 100%;
  max-width: 420px;
  margin-left: auto;
}

.demo-card__inner {
  background: rgba(0, 0, 0, 0.92);
  border: 1px solid rgba(30, 215, 96, 0.35);
  border-radius: 18px;
  padding: 1.25rem 1.25rem 1.1rem;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
}

.demo-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  margin: 0 0 0.35rem;
}

.demo-card__subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  text-align: center;
  margin: 0 0 1rem;
  line-height: 1.35;
}

.demo-card__form {
  display: grid;
  gap: 0.65rem;
}

.demo-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  font-size: 0.95rem;
  outline: none;
}

.demo-input:focus {
  border-color: rgba(30, 215, 96, 0.7);
  box-shadow: 0 0 0 3px rgba(30, 215, 96, 0.18);
}

.demo-card__meta {
  text-align: center;
  font-size: 0.78rem;
  opacity: 0.7;
  margin: 0.25rem 0 0;
}

.demo-card__divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 0.9rem 0 0.75rem;
}

.demo-card__checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.45rem;
  font-size: 0.82rem;
  opacity: 0.9;
}

.demo-card__checks li {
  position: relative;
  padding-left: 1.35rem;
}

.demo-card__checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: #1ed760;
}

/* Accessibility helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}