.mb { max-width: 820px; margin: 0 auto; }
.mb-step { margin: 18px 0; }
.mb-card {
  border: 1px solid rgba(0,0,0,.12);
  border-radius: 16px;
  padding: 18px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(0,0,0,.06);
}
.mb-title { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.mb-note { display:block; margin-top: 10px; opacity: .75; }
.mb-choice { display:flex; gap:12px; flex-wrap:wrap; }
.mb-choice-btn {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,.15);
  background: #f7f7f7;
  cursor:pointer;
  font-weight: 600;
}
.mb-choice-btn:hover { filter: brightness(.98); }
.mb-select, .mb-input {
  width: 100%;
  max-width: 520px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.18);
}
.mb-switch { display:flex; gap:10px; align-items:center; font-weight: 600; }
.mb-actions { display:flex; gap:12px; flex-wrap:wrap; }
.mb-primary { padding: 12px 14px; border-radius: 14px; cursor:pointer; font-weight:800; }
.mb-summary { margin-top: 12px; padding: 12px; background:#f6f6f6; border-radius: 12px; min-height: 80px; }
.mb-ready { border-left: 6px solid rgba(0,0,0,.2); }
.is-hidden { display:none; }

.mb-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

@media (max-width: 640px) {
  .mb-grid { grid-template-columns: 1fr; }
}

.mb-card-btn {
  text-align: left;
  border: 1px solid rgba(0,0,0,.12);
  background: #fff;
  border-radius: 16px;
  padding: 12px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0,0,0,.06);
}

.mb-card-btn:hover { transform: translateY(-1px); }

.mb-choice-btn:hover {
  background: #efefef;
}

.mb-choice-btn.is-selected,
.mb-card-btn.is-selected {
  background: #f0f0f0;
  border-color: rgba(0,0,0,.25);
  box-shadow: 0 0 0 3px rgba(0,0,0,.15);
}


.mb-step.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}


.mb-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(0,0,0,.08);
  background: #f6f6f6;
}

.mb-card-label {
  margin-top: 10px;
  font-weight: 800;
  font-size: 16px;
}