/* ============================================================
   Generatore di brani alternati — Strumenti per professionisti
   Stessa palette del Generatore di Schede:
   blu #1687B8, blu vivo #29ABE2, scuro #0E5F86
   ============================================================ */

:root {
  --blu: #1687b8;
  --blu-vivo: #29abe2;
  --blu-scuro: #0e5f86;
  --blu-fill: #e8f4fa;
  --sfondo: #e9eef2;
  --tile: #eef3f7;
  --testo: #2f3e4d;
  --nota: #78879a;
  --bianco: #ffffff;
  --raggio: 12px;
  --ombra: 0 1px 3px rgba(20, 60, 90, 0.08);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: "Poppins", system-ui, sans-serif;
  background: var(--sfondo);
  color: var(--testo);
}

/* ---------- Testata ---------- */

.testata {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 24px;
  background: var(--bianco);
  box-shadow: var(--ombra);
  position: sticky;
  top: 0;
  z-index: 10;
}

.testata-logo img { height: 40px; display: block; }

.testata-titolo {
  flex: 1;
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--blu);
  text-align: center;
}

.btn-istruzioni {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  font-family: inherit;
  font-size: 14px;
  color: var(--testo);
  background: var(--bianco);
  border: 1px solid #cfd8de;
  border-radius: 999px;
  cursor: pointer;
}
.btn-istruzioni:hover { border-color: var(--blu-vivo); color: var(--blu); }

.icona-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--testo);
  color: var(--bianco);
  font-size: 11px;
  font-weight: 700;
  font-style: italic;
}

/* ---------- Contenuto ---------- */

.contenuto { max-width: 1200px; margin: 0 auto; padding: 20px 16px 48px; }

.due-colonne {
  display: grid;
  grid-template-columns: minmax(340px, 480px) 1fr;
  gap: 28px;
  align-items: start;
}

.colonna-titolo {
  margin: 4px 0 14px;
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  text-align: center;
}

/* ---------- Pannello parametri ---------- */

.pannello-parametri {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tile {
  background: var(--tile);
  border-radius: 10px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.tile-etichetta { font-size: 14px; font-weight: 500; text-align: center; }
.tile-nota { font-size: 11.5px; color: var(--nota); font-weight: 400; }

.tile-larga { grid-column: 1 / -1; align-items: stretch; }
.tile-larga .tile-etichetta { text-align: left; }

.conta-parole { font-size: 12px; color: var(--nota); font-weight: 400; }

.campo-testo {
  width: 100%;
  padding: 11px 14px;
  font-family: inherit;
  font-size: 14px;
  color: var(--testo);
  background: var(--bianco);
  border: 1px solid #d5dde3;
  border-radius: 10px;
}
.campo-testo::placeholder { color: #a9b6c0; font-size: 13px; }
.campo-testo:focus {
  outline: none;
  border-color: var(--blu-vivo);
  box-shadow: 0 0 0 3px rgba(41, 171, 226, 0.18);
}

.area-brano { resize: vertical; min-height: 96px; line-height: 1.5; }

/* Tendina (preset per classe) */
.tendina {
  padding: 10px 14px;
  font-family: inherit;
  font-size: 14px;
  color: var(--testo);
  background: var(--bianco);
  border: 1px solid #d5dde3;
  border-radius: 10px;
  cursor: pointer;
}
.tendina:focus {
  outline: none;
  border-color: var(--blu-vivo);
  box-shadow: 0 0 0 3px rgba(41, 171, 226, 0.18);
}
.tendina-larga { width: 100%; }

/* ---------- Palette dei colori ---------- */

.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.swatch {
  width: 30px;
  height: 30px;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  transition: transform 0.12s ease;
}
.swatch:hover { transform: scale(1.12); }
.swatch.attivo {
  border-color: var(--bianco);
  box-shadow: 0 0 0 3px var(--blu-scuro);
}

/* «Invisibile»: cerchio bianco barrato */
.swatch-invisibile {
  background: var(--bianco);
  border: 2px solid #c3cdd5;
}
.swatch-invisibile::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 50%;
  height: 2px;
  background: #c3cdd5;
  transform: rotate(-45deg);
}
.swatch-invisibile.attivo { border-color: var(--bianco); }

/* ---------- Stepper ---------- */

.stepper { display: flex; align-items: center; gap: 10px; }

.stepper-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--blu);
  background: var(--bianco);
  color: var(--blu);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background 0.12s ease;
}
.stepper-btn:hover { background: var(--blu-fill); }
.stepper-btn:active { background: var(--blu); color: var(--bianco); }

.stepper-valore {
  min-width: 68px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
}

/* ---------- Segmento ---------- */

.segmento {
  display: flex;
  background: #dfe6ec;
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}

.segmento-btn {
  flex: 1;
  padding: 8px 12px;
  border: none;
  border-radius: 9px;
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  color: var(--nota);
  cursor: pointer;
}
.segmento-btn.attivo {
  background: var(--bianco);
  color: var(--blu);
  font-weight: 600;
  box-shadow: var(--ombra);
}

/* ---------- Interruttore sì/no ---------- */

.interruttore {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 74px;
  padding: 5px 14px 5px 6px;
  border: none;
  border-radius: 999px;
  background: #dfe6ec;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--nota);
  cursor: pointer;
  transition: background 0.15s ease;
}
.interruttore-pallino {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bianco);
  box-shadow: var(--ombra);
  transition: transform 0.15s ease;
}
.interruttore.acceso {
  background: var(--blu-scuro);
  color: var(--bianco);
  padding: 5px 6px 5px 14px;
}
.interruttore.acceso .interruttore-pallino { order: 2; }
.interruttore.acceso .interruttore-testo { order: 1; }

/* ---------- Avvisi e azioni ---------- */

.avviso {
  margin-top: 12px;
  padding: 12px 16px;
  background: #fff7e0;
  color: #8a6100;
  border-radius: 10px;
  font-size: 13.5px;
  line-height: 1.5;
}

.riga-azioni {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

.btn-crea {
  padding: 13px 30px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--bianco);
  background: var(--blu-scuro);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(14, 95, 134, 0.35);
}
.btn-crea:hover { background: var(--blu); }
.btn-crea:disabled { background: #a9b6c0; cursor: not-allowed; box-shadow: none; }

.btn-secondario {
  padding: 12px 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--blu);
  background: var(--bianco);
  border: 1px solid var(--blu);
  border-radius: 10px;
  cursor: pointer;
}
.btn-secondario:hover { background: var(--blu-fill); }

/* ---------- Anteprima: il foglio A4 ---------- */

.foglio-contenitore {
  position: relative;
  overflow: hidden;
}

/* Il foglio è largo davvero 210 mm e viene rimpicciolito via transform
   dal JS perché entri nella colonna: così i "va a capo" dell'anteprima
   coincidono (quasi) con quelli del PDF. */
.foglio {
  width: 210mm;
  min-height: 297mm;
  padding: 20mm;
  background: var(--bianco);
  box-shadow: 0 4px 18px rgba(20, 60, 90, 0.18);
  border-radius: 3px;
  transform-origin: top left;
  font-family: Helvetica, Arial, sans-serif;
}

.foglio-titolo {
  margin: 0 0 8mm;
  text-align: center;
  font-weight: 700;
  color: #1a1a1a;
}

.foglio-testo { margin: 0; }

.parola { display: inline-block; }
.parola-invisibile { opacity: 0.15; }

.foglio-vuoto {
  margin: 0;
  color: var(--nota);
  font-family: "Poppins", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.nota-anteprima {
  margin: 12px 0 0;
  font-size: 12.5px;
  color: var(--nota);
  line-height: 1.5;
  text-align: center;
}

/* ---------- Dialogo istruzioni ---------- */

dialog {
  max-width: 500px;
  border: none;
  border-radius: var(--raggio);
  padding: 28px;
  font-family: "Poppins", system-ui, sans-serif;
  color: var(--testo);
  box-shadow: 0 12px 40px rgba(20, 60, 90, 0.3);
}
dialog::backdrop { background: rgba(30, 50, 70, 0.45); }
dialog h3 { margin: 0 0 10px; color: var(--blu); }
dialog p { margin: 0 0 16px; line-height: 1.55; font-size: 14.5px; }

/* ---------- Notifica (toast) ---------- */

#toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  max-width: calc(100% - 32px);
  padding: 13px 22px;
  background: var(--blu-scuro);
  color: var(--bianco);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 600;
  text-align: center;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(14, 95, 134, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
}
#toast.mostra { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .due-colonne { grid-template-columns: 1fr; }
  .testata { flex-wrap: wrap; }
  .testata-titolo { font-size: 17px; }
}

@media (max-width: 560px) {
  .contenuto { padding: 16px 12px 40px; }
  .testata { gap: 12px; padding: 10px 14px; }
  .pannello-parametri { grid-template-columns: 1fr; }
  .riga-azioni { flex-wrap: wrap; }
  .riga-azioni .btn-crea { flex: 1 1 100%; order: -1; }
}