/* Danfoss inverter sizing tool -- vanilla CSS, no framework.
   --danfoss-red e' una stima visiva dai riferimenti di brand forniti
   (screenshot store.danfoss.com), non campionata pixel-per-pixel.
   Sostituire con il valore esatto da brand guideline se disponibile. */

:root {
  --danfoss-red: #e2001a;
  --danfoss-red-dark: #b80015;
  --ink: #1a1a1a;
  --ink-muted: #5c5c5c;
  --border: #e2e2e2;
  --bg: #ffffff;
  --bg-subtle: #f7f7f7;
  --warning-bg: #fff4d6;
  --warning-border: #e8b400;
  --radius: 10px;
  --font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
}

.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;
}

/* ---------- Topbar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.topbar__brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.topbar__brand-sub {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 700;
}

.topbar__controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.dataset-info {
  font-style: italic;
  color: var(--ink-muted);
  font-size: 0.72rem;
  white-space: nowrap;
}

.dataset-info[hidden] {
  display: none;
}

/* Dropdown lingua minimale, senza bordo pesante */
select.lang-switch {
  appearance: none;
  -webkit-appearance: none;
  background: transparent url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%235c5c5c' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")
    no-repeat right 6px center;
  border: none;
  border-radius: 6px;
  padding: 5px 20px 5px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-muted);
  cursor: pointer;
}

select.lang-switch:hover,
select.lang-switch:focus {
  background-color: var(--bg-subtle);
  color: var(--ink);
  outline: none;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--ink-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--bg-subtle);
  color: var(--ink);
}

/* ---------- Page layout ---------- */

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px 16px 40px;
}

.form-card {
  max-width: 640px;
  margin: 0 auto;
}

@media (min-width: 960px) {
  .page {
    max-width: 1200px;
  }
}

.page__heading {
  font-size: 1.2rem;
  margin: 0 0 12px;
  text-align: center;
}

/* ---------- Form ---------- */
/* Griglia compatta: 1 colonna sui telefoni piu' stretti, 2 colonne da
   480px in su, cosi' l'utente scrolla il meno possibile prima dei
   risultati (vedi .field--full per i campi a piena larghezza). */

.form-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px 16px;
}

@media (min-width: 480px) {
  .form-card {
    grid-template-columns: 1fr 1fr;
  }

  .field--full {
    grid-column: 1 / -1;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.field label {
  font-weight: 600;
  font-size: 0.92rem;
}

.field__label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

#margin-value {
  font-weight: 700;
  color: var(--danfoss-red);
}

.field__input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.field input[type="number"],
.field input[type="password"],
.field select {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  width: 100%;
}

.field input[type="number"] {
  flex: 1;
}

.field__unit {
  color: var(--ink-muted);
  font-weight: 600;
}

.field input:focus,
.field select:focus {
  outline: 2px solid var(--danfoss-red);
  outline-offset: 1px;
}

.field__help {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.25;
  color: var(--ink-muted);
}

.field__error {
  margin: 0;
  font-size: 0.82rem;
  color: var(--danfoss-red-dark);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--danfoss-red);
}

/* ---------- Duty mode toggle ---------- */

.field--toggle {
  gap: 4px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
}

.toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.toggle__track {
  position: relative;
  width: 40px;
  height: 22px;
  flex: 0 0 auto;
  background: var(--border);
  border-radius: 999px;
  transition: background-color 0.15s ease;
}

.toggle__track::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s ease;
}

.toggle input[type="checkbox"]:checked + .toggle__track {
  background: var(--danfoss-red);
}

.toggle input[type="checkbox"]:checked + .toggle__track::before {
  transform: translateX(18px);
}

.toggle input[type="checkbox"]:focus-visible + .toggle__track {
  outline: 2px solid var(--danfoss-red);
  outline-offset: 2px;
}

/* ---------- Results ---------- */

.results {
  margin-top: 18px;
}

.results h2 {
  font-size: 1.1rem;
  margin: 0 0 4px;
}

.results__intro {
  margin: 0 0 10px;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.results__hint {
  color: var(--ink-muted);
  font-style: italic;
  font-size: 0.9rem;
}

/* Elenco verticale di righe orizzontali (una per famiglia), non piu' una
   griglia di card affiancate: ogni famiglia occupa tutta la larghezza
   disponibile, foto a sinistra + dati a destra. */
.results__grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 14px;
  background: #fff;
}

.result-card--incompatible {
  background: var(--bg-subtle);
  color: var(--ink-muted);
  align-items: baseline;
  flex-wrap: wrap;
}

.result-card--incompatible .result-card__family {
  flex: 0 0 auto;
  min-width: 86px;
}

.result-card__image-wrap {
  flex: 0 0 72px;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-subtle);
  border-radius: 6px;
  overflow: hidden;
}

.result-card__image-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.result-card__body {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-card__heading {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.result-card__family {
  font-weight: 700;
  font-size: 1rem;
}

.result-card__size {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--danfoss-red);
}

.result-card__data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px 16px;
}

@media (min-width: 560px) {
  .result-card__data-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .result-card__data-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.result-card__row {
  font-size: 0.8rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.result-card__row strong {
  color: var(--ink);
  font-weight: 600;
}

.badge-unverified {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: center;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: #7a5c00;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}

.result-card__footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 4px;
}

.result-card__link {
  display: inline-block;
  text-align: center;
  padding: 7px 14px;
  border-radius: 6px;
  background: var(--danfoss-red);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.82rem;
  flex: 0 0 auto;
}

.result-card__link:hover {
  background: var(--danfoss-red-dark);
}

.result-card__reason {
  font-size: 0.85rem;
  font-style: italic;
}

.result-card__source-note {
  margin: 0;
  font-size: 0.74rem;
  line-height: 1.35;
  color: var(--ink-muted);
  flex: 1 1 220px;
}

.result-card__source-note a {
  color: var(--danfoss-red);
  font-weight: 600;
}

/* Sotto i 420px la foto si riduce ulteriormente, ma la riga resta
   orizzontale (foto a sinistra, dati a destra) anche sui telefoni piu'
   stretti -- non torna mai a un blocco impilato verticalmente. */
@media (max-width: 420px) {
  .result-card {
    padding: 10px;
    gap: 10px;
  }

  .result-card__image-wrap {
    flex-basis: 52px;
    width: 52px;
    height: 52px;
  }
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  padding: 16px;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--ink-muted);
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- Admin modal ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 100;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal h2 {
  margin: 0;
  font-size: 1.1rem;
}

.modal__note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-muted);
  background: var(--bg-subtle);
  padding: 8px 10px;
  border-radius: 6px;
}

.modal__note--success {
  background: #e6f4ea;
  color: #1e6b34;
}

.modal__note--error {
  background: #fdeceb;
  color: var(--danfoss-red-dark);
}

.modal__error {
  margin: 0;
  font-size: 0.82rem;
  color: var(--danfoss-red-dark);
}

.admin-action {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

.admin-action:first-child {
  border-top: none;
  padding-top: 0;
}

.admin-action__file-label {
  display: inline-block;
  text-align: center;
  cursor: pointer;
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn--primary {
  background: var(--danfoss-red);
  color: #fff;
}

.btn--primary:disabled {
  background: #d9a3a9;
  cursor: not-allowed;
}

.btn--secondary {
  background: none;
  border-color: var(--border);
  color: var(--ink);
}

.btn--secondary:hover {
  background: var(--bg-subtle);
}

@media (max-width: 480px) {
  .topbar {
    flex-wrap: wrap;
    gap: 10px;
  }
}