:root {
  --carta: #F0EFE6;
  --carta-scura: #E6E4D6;
  --inchiostro: #1C2620;
  --inchiostro-tenue: #5B6459;
  --bordo: #D3CFC0;
  --verde: #2F6B4F;
  --verde-chiaro: #E4EEE7;
  --rosso: #A23E3E;
  --rosso-chiaro: #F5E9E9;
  --font-testo: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-numeri: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--carta);
  color: var(--inchiostro);
  font-family: var(--font-testo);
  min-height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

h1 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 4px;
}

.sottotitolo {
  color: var(--inchiostro-tenue);
  margin: 0 0 20px;
  font-size: 0.95rem;
}

button, input {
  font-family: inherit;
  font-size: 1rem;
}

:focus-visible {
  outline: 3px solid var(--verde);
  outline-offset: 2px;
}

/* -------------------------------------------------- pagina login/centrata */

.pagina-centrata {
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.scheda-login {
  background: #fff;
  border: 1px solid var(--bordo);
  border-radius: 10px;
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
}

.etichetta-barcode {
  font-family: var(--font-numeri);
  letter-spacing: 2px;
  color: var(--inchiostro-tenue);
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.scheda-login form { display: flex; flex-direction: column; gap: 16px; margin-top: 20px; }
.scheda-login label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: var(--inchiostro-tenue); }
.scheda-login input {
  padding: 12px 14px;
  border: 1px solid var(--bordo);
  border-radius: 8px;
  background: var(--carta);
  color: var(--inchiostro);
}
.scheda-login button {
  margin-top: 8px;
  padding: 13px;
  border: none;
  border-radius: 8px;
  background: var(--verde);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.scheda-login button:active { opacity: 0.85; }

.messaggio-errore {
  background: var(--rosso-chiaro);
  color: var(--rosso);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  margin: 0 0 4px;
}

/* --------------------------------------------------------------- barra alta */

.barra-alta {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--carta);
  border-bottom: 1px solid var(--bordo);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.barra-alta-sinistra { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.barra-alta-sinistra strong { font-size: 0.95rem; }

.link-supermercato {
  background: none;
  border: none;
  padding: 0;
  color: var(--verde);
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60vw;
}

.barra-alta-destra { display: flex; gap: 14px; align-items: center; }

.pulsante-testo {
  background: none;
  border: none;
  color: var(--inchiostro-tenue);
  font-size: 0.85rem;
  text-decoration: none;
  cursor: pointer;
  padding: 6px 0;
}

main {
  flex: 1;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.schermata[hidden] { display: none; }

/* -------------------------------------------------------- form supermercato */

#form-supermercato { display: flex; flex-direction: column; gap: 14px; }
#input-supermercato {
  padding: 14px;
  border: 1px solid var(--bordo);
  border-radius: 8px;
  background: #fff;
}

/* ------------------------------------------------------------- scansione */

#schermata-scansione { text-align: center; padding-top: 40px; }

.pulsante-scansione {
  width: 100%;
  padding: 28px 16px;
  border: 2px dashed var(--verde);
  border-radius: 14px;
  background: var(--verde-chiaro);
  color: var(--verde);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.icona-scansione {
  font-family: var(--font-numeri);
  font-size: 1.8rem;
  letter-spacing: 1px;
}

.suggerimento { color: var(--inchiostro-tenue); font-size: 0.85rem; margin-top: 16px; }

#reader {
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 16px;
  border: 1px solid var(--bordo);
}

/* --------------------------------------------------------------- prodotto */

.numero-barcode {
  font-family: var(--font-numeri);
  letter-spacing: 1px;
  color: var(--inchiostro-tenue);
  text-align: center;
  margin: 0 0 20px;
}

#form-prodotto { display: flex; flex-direction: column; gap: 16px; }
#form-prodotto label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: var(--inchiostro-tenue); }
#form-prodotto input[type="text"] {
  padding: 13px 14px;
  border: 1px solid var(--bordo);
  border-radius: 8px;
  background: #fff;
}

.campo-prezzo {
  display: flex;
  align-items: center;
  border: 1px solid var(--bordo);
  border-radius: 8px;
  background: #fff;
  padding: 0 14px;
}
.campo-prezzo span { color: var(--inchiostro-tenue); }
.campo-prezzo input {
  border: none;
  padding: 13px 8px;
  font-family: var(--font-numeri);
  font-size: 1.2rem;
  flex: 1;
  background: transparent;
}
.campo-prezzo input:focus { outline: none; }

#form-prodotto button[type="submit"] {
  padding: 14px;
  border: none;
  border-radius: 8px;
  background: var(--verde);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
}

.confronto-prezzi { border-top: 1px solid var(--bordo); padding-top: 14px; }
.titolo-confronto { font-size: 0.85rem; color: var(--inchiostro-tenue); margin: 0 0 10px; }
.nessun-prezzo { font-size: 0.9rem; color: var(--inchiostro-tenue); }

.riga-prezzo {
  display: flex;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 0.92rem;
}
.riga-prezzo.migliore { background: var(--verde-chiaro); color: var(--verde); font-weight: 600; }
.valore-prezzo { font-family: var(--font-numeri); }

/* -------------------------------------------------------------- cronologia */

#input-cerca {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--bordo);
  border-radius: 8px;
  background: #fff;
  margin-bottom: 16px;
}

.voce-cronologia {
  border-bottom: 1px solid var(--bordo);
  padding: 10px 2px;
}
.voce-cronologia-testa { display: flex; justify-content: space-between; gap: 10px; }
.voce-cronologia-dettagli { color: var(--inchiostro-tenue); font-size: 0.8rem; margin-top: 2px; }

#btn-chiudi-cronologia { display: block; margin: 20px auto 0; }