/* ============================================
   FORM VALIDATION
   Reusable error/invalid state for .input fields
   used by any form (admin, materials, mix-design).
   Pair with the corresponding server-side error
   message rendered as <p class="form-error">…
   ============================================ */

.input.is-invalid {
  border-color: var(--color-danger, #ef4444);
  border-width: 1.5px;
  background-color: var(--color-danger-light, #fef2f2);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.08);
}

.input.is-invalid:focus {
  outline: none;
  border-color: var(--color-danger, #ef4444);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* Dark mode: deeper danger tint */
.dark .input.is-invalid,
[data-theme="dark"] .input.is-invalid {
  background-color: rgba(239, 68, 68, 0.08);
  border-color: var(--color-danger, #ef4444);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.10);
}

/* Inline error message below a field */
.form-error {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.8125rem;       /* 13px */
  line-height: 1.25rem;
  color: var(--color-danger, #ef4444);
}

.form-error::before {
  content: "⚠";                /* exclamation / warning glyph */
  display: inline-block;
  margin-right: 0.25rem;
  font-weight: 700;
}

/* Dark-mode contrast tweak */
.dark .form-error,
[data-theme="dark"] .form-error {
  color: #fca5a5;              /* tailwind red-300 — readable on dark bg */
}

.dark .form-error::before,
[data-theme="dark"] .form-error::before {
  color: #fca5a5;
}