/* ============================================================
   QR Brandify — styles.css
   Coerente con il tema davidefrigoli.it
   Palette: off-white #fdfdfd · charcoal #1a1a1a · grigio #888
   Font: Literata (serif, titoli) + Inter (sans, UI)
   ============================================================ */

/* ============================================================
   FONT SELF-HOSTED (nessuna chiamata a Google Fonts)
   File woff2 in fonts/ · font-display: swap
   ============================================================ */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/inter-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/literata-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/literata-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/literata-700.woff2') format('woff2');
}

:root {
  --bg: #fdfdfd;
  --ink: #1a1a1a;
  --ink-soft: #333;
  --grey: #888;
  --grey-light: #999;
  --line: #eee;
  --line-mid: #ddd;
  /* Avviso soft (ambra/arancione) */
  --warn-bg: #fff7e6;
  --warn-border: #e8c87a;
  --warn-ink: #7a4e0a;
  /* Avviso errore bloccante (rosso su rosato) */
  --error-bg: #fdecea;
  --error-border: #e0a59e;
  --error-ink: #a02216;
  --serif: 'Literata', Georgia, serif;
  --sans: 'Inter', system-ui, sans-serif;
  --maxw: 1080px;
  --radius: 6px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); }

/* Focus state accessibile e visibile ovunque */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ============================================================
   HEADER
   ============================================================ */
.qr-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px;
}

.qr-brand {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
}

.qr-brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
}

.qr-brand-role {
  font-family: var(--sans);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--grey);
}

/* ============================================================
   TOOL — above the fold
   ============================================================ */
.qr-tool {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 20px 56px;
}

.qr-tool-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

/* --- Controlli --- */
.qr-eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--grey-light);
  margin: 0 0 10px;
}

#qr-h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 32px;
}

.qr-form {
  margin: 0;
  border: 0;
}

.qr-field {
  margin-bottom: 26px;
  padding: 0;
  border: 0;
}

.qr-field > label,
.qr-colors legend {
  display: block;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 10px;
  padding: 0;
}

#qr-input {
  width: 100%;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
  padding: 14px 16px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

#qr-input::placeholder { color: #bbb; }

#qr-input:focus {
  border-color: var(--ink);
  outline: none;
}

.qr-hint {
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--grey);
  margin: 8px 0 0;
}

/* --- Colori --- */
.qr-colors { margin-bottom: 26px; }

.qr-color-row {
  display: flex;
  gap: 28px;
}

.qr-color-row label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink-soft);
  cursor: pointer;
}

.qr-color-row input[type="color"] {
  width: 40px;
  height: 40px;
  padding: 2px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
}

/* --- Dropzone logo --- */
.qr-dropzone {
  position: relative;
  border: 1px dashed var(--line-mid);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  background: #fff;
  transition: border-color 0.2s, background 0.2s;
}

.qr-dropzone.is-dragover {
  border-color: var(--ink);
  background: #fafafa;
}

.qr-dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.qr-dropzone-text {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0 0 4px;
}

.qr-dropzone-link {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.qr-dropzone .qr-hint { margin-top: 6px; }

/* --- Avvisi (collocati sopra l'anteprima, nella colonna destra) --- */
.qr-warnings:empty { display: none; }

.qr-warnings {
  margin-bottom: 16px;
}

.qr-warning {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--sans);
  font-size: 0.82rem;
  line-height: 1.45;
  border: 1px solid;
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 10px;
}

.qr-warning:last-child { margin-bottom: 0; }

.qr-warning__icon {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 1px;
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  color: #fff;
}

.qr-warning__text { flex: 1; }

/* Livello soft: ambra/arancione, il QR si genera comunque */
.qr-warning--soft {
  color: var(--warn-ink);
  background: var(--warn-bg);
  border-color: var(--warn-border);
}
.qr-warning--soft .qr-warning__icon { background: #c9820c; }

/* Livello errore: rosso su rosato, azione fallita */
.qr-warning--error {
  color: var(--error-ink);
  background: var(--error-bg);
  border-color: var(--error-border);
}
.qr-warning--error .qr-warning__icon { background: #c0392b; }

/* ============================================================
   ANTEPRIMA (sticky su desktop)
   ============================================================ */
.qr-preview-sticky {
  position: sticky;
  top: 28px;
}

.qr-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
}

.qr-preview canvas,
.qr-preview svg {
  max-width: 100%;
  height: auto;
}

.qr-preview-placeholder {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--grey);
  text-align: center;
  margin: 0;
}

.qr-downloads {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.qr-btn {
  flex: 1;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 13px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: opacity 0.2s;
}

.qr-btn-primary {
  background: var(--ink);
  color: #fff;
}

.qr-btn-secondary {
  background: #fff;
  color: var(--ink);
}

.qr-btn:hover:not(:disabled) { opacity: 0.8; }

.qr-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.qr-download-hint {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--grey);
  text-align: center;
  margin: 12px 0 0;
}

/* --- Trust row --- */
.qr-trust {
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--grey);
  text-align: center;
  margin: 48px 0 0;
}

/* ============================================================
   CONTENUTO SEO
   ============================================================ */
.qr-content {
  max-width: 68ch;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

.qr-section {
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

.qr-section h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.25;
  color: var(--ink);
  margin: 0 0 24px;
}

.qr-section h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0 0 6px;
}

.qr-section p {
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-soft);
  margin: 0 0 1.2em;
}

.qr-section p:last-child { margin-bottom: 0; }

/* --- Come funziona --- */
.qr-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.qr-steps p { margin: 0; font-size: 1rem; }

/* --- Box privacy --- */
.qr-privacy p {
  font-size: 1.1rem;
}

/* --- Casi d'uso --- */
.qr-usecases {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.qr-usecases li {
  display: flex;
  flex-direction: column;
}

.qr-usecases strong {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
  margin-bottom: 2px;
}

.qr-usecases span {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink-soft);
}

/* --- FAQ --- */
.qr-faq details {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}

.qr-faq summary {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 28px;
}

.qr-faq summary::-webkit-details-marker { display: none; }

.qr-faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 400;
  font-size: 1.4rem;
  color: var(--grey);
  line-height: 1;
}

.qr-faq details[open] summary::after { content: "\2013"; }

.qr-faq details p {
  font-size: 1rem;
  margin: 12px 0 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.qr-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 20px 56px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.qr-footer p {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--grey);
  margin: 0;
}

.qr-footer a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
}

.qr-footer a:hover { color: var(--ink); }

/* ============================================================
   RESPONSIVE — mobile: anteprima sotto i controlli
   ============================================================ */
@media (max-width: 860px) {
  .qr-tool-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Su mobile la colonna controlli resta prima, l'anteprima sotto */
  .qr-preview-sticky {
    position: static;
  }

  #qr-h1 { font-size: 1.7rem; }
}

@media (max-width: 480px) {
  .qr-downloads { flex-direction: column; }
  .qr-color-row { gap: 18px; }
  #qr-h1 { font-size: 1.5rem; }
}