/* Mobile-first, typeform-like layout */
.invis-calc { max-width: 760px; margin: 0 auto; padding: 12px; font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
.invis-calc__h { font-size: 1.25rem; margin: 0 0 12px 0; }
.invis-calc__form { display: block; }

.invis-calc__step { display: none; background: #fff; border: 1px solid #eee; border-radius: 14px; padding: 16px; box-shadow: 0 2px 10px rgba(0,0,0,0.04); margin-bottom: 12px; }
.invis-calc__step.is-active { display: block; }

.invis-calc__label { display: block; font-weight: 600; margin-bottom: 6px; }
.invis-calc__row { margin-bottom: 12px; }
.invis-hint { margin: 6px 0 0 0; font-size: 0.85rem; color: #666; }

.invis-input { width: 100%; border: 1px solid #ddd; border-radius: 10px; padding: 10px 12px; font-size: 16px; outline: none; }
.invis-input:focus { border-color: #7c3aed; box-shadow: 0 0 0 3px rgba(124,58,237,0.15); }

.invis-calc__nav { margin-top: 4px; display: flex; gap: 8px; }
.invis-btn { border: 1px solid #ddd; background: #f8f8f8; border-radius: 999px; padding: 10px 16px; font-weight: 600; cursor: pointer; }
.invis-btn:hover { background: #f1f1f1; }
.invis-btn--primary { border-color: #7c3aed; background: #7c3aed; color: #fff; }
.invis-btn--primary:hover { background: #6d28d9; }
.invis-btn--ghost { background: transparent; }

.invis-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 720px) {
  .invis-grid { grid-template-columns: 1fr 1fr; }
}
.invis-grid__col {}

.invis-warning { color: #b91c1c; background: #fee2e2; border: 1px solid #fecaca; padding: 8px 10px; border-radius: 10px; }
.invis-success { color: #065f46; background: #d1fae5; border: 1px solid #a7f3d0; padding: 8px 10px; border-radius: 10px; }

.invis-result { border: 1px dashed #e5e7eb; border-radius: 14px; padding: 14px; background: #fafafa; }
.invis-result__headline { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.invis-result__label { font-size: 0.95rem; color: #555; }
.invis-result__value { font-size: 2rem; font-weight: 800; }
.invis-result__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.invis-result__k { font-size: 0.85rem; color: #666; }
.invis-result__v { font-weight: 700; }

.invis-lead { margin-top: 14px; }
.invis-lead__row { display: flex; gap: 8px; }
.invis-lead__row .invis-input { flex: 1; }