/* app.css — interfaccia dell'app (Università Inclusiva).
 *
 * Requisiti: WCAG 2.2 AA — contrasto ≥ 4.5:1 (testo) e ≥ 3:1 (bordi, focus, stati),
 * focus visibile, target ≥ 24×24, nessuna informazione affidata al solo colore,
 * usabile da tastiera, zoom 200% senza perdita di contenuto.
 *
 * TEMI: le variabili sono definite per tema. Il tema di sistema si applica solo se
 * l'utente NON ha scelto esplicitamente (`html[data-theme]` vince sul media query).
 * Regola chiave: `--brand-bg` è SEMPRE uno sfondo scuro/opaco e `--on-brand` il
 * colore del testo che ci sta sopra; `--brand` serve solo per testo/bordi su `--bg`.
 * (Prima l'header usava --brand come sfondo con testo bianco: in tema scuro dava
 * 1.98:1, cioè illeggibile.)
 */

/* ---------- tema chiaro (predefinito) ---------- */
:root{
  --bg:#ffffff; --fg:#14202a;
  --brand:#0E3A4F;                 /* testo/bordi su --bg */
  --brand-bg:#0E3A4F;              /* sfondo header/footer */
  --on-brand:#ffffff;              /* testo su --brand-bg */
  --accent:#2E8B57; --on-accent:#000000;
  --focus:#8a5a00;
  --field-bd:#5a6b76; --err:#a4123f; --muted:#4a5860; --card:#f4f7f9;
  --badge-pending:#7a4f00; --badge-approved:#1c6b3a; --badge-rejected:#a4123f;
  /* personalizzazione utente (barra accessibilità) */
  --ui-scale:1; --ui-line:1.6; --ui-letter:0em; --ui-word:0em;
  --ui-font: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

/* ---------- tema scuro: automatico solo se l'utente non ha scelto ---------- */
@media (prefers-color-scheme: dark){
  :root:not([data-theme]){
    --bg:#0f1519; --fg:#e7edf2;
    --brand:#7fc0e6;               /* chiaro: ok come TESTO su fondo scuro */
    --brand-bg:#0b2c3c;            /* sfondo header: resta scuro */
    --on-brand:#eaf4fb;
    --accent:#5cc98a; --on-accent:#04150b;
    --focus:#ffd400;
    --field-bd:#8aa0ac; --err:#ff8fb0; --muted:#aab8c0; --card:#161e24;
    --badge-pending:#f0b429; --badge-approved:#5cc98a; --badge-rejected:#ff8fb0;
  }
}

/* ---------- scelte esplicite dell'utente ---------- */
:root[data-theme="scuro"]{
  --bg:#0f1519; --fg:#e7edf2;
  --brand:#7fc0e6; --brand-bg:#0b2c3c; --on-brand:#eaf4fb;
  --accent:#5cc98a; --on-accent:#04150b;
  --focus:#ffd400;
  --field-bd:#8aa0ac; --err:#ff8fb0; --muted:#aab8c0; --card:#161e24;
  --badge-pending:#f0b429; --badge-approved:#5cc98a; --badge-rejected:#ff8fb0;
}
:root[data-theme="seppia"]{
  --bg:#f6ecd8; --fg:#3f3018;
  --brand:#5a3d10; --brand-bg:#5a3d10; --on-brand:#fdf6e8;
  --accent:#2E8B57; --on-accent:#000000;
  --focus:#7a4f00;
  --field-bd:#7a6640; --err:#8c1030; --muted:#5b4a2c; --card:#efe2c8;
  --badge-pending:#7a4f00; --badge-approved:#1c6b3a; --badge-rejected:#8c1030;
}
:root[data-theme="altocontrasto"]{
  --bg:#000000; --fg:#ffffff;
  --brand:#ffd400; --brand-bg:#000000; --on-brand:#ffffff;
  --accent:#ffd400; --on-accent:#000000;
  --focus:#ffd400;
  --field-bd:#ffffff; --err:#ff9aa2; --muted:#f2f2f2; --card:#0a0a0a;
  --badge-pending:#ffd400; --badge-approved:#7cf29b; --badge-rejected:#ff9aa2;
}

*{ box-sizing:border-box; }

html,body{ margin:0; background:var(--bg); color:var(--fg); }

body{
  font-family:var(--ui-font);
  font-size:calc(1rem * var(--ui-scale));
  line-height:var(--ui-line);
  letter-spacing:var(--ui-letter);
  word-spacing:var(--ui-word);
}
/* carattere ad alta leggibilità (opzione della barra accessibilità) */
html[data-font="leggibile"]{
  --ui-font:"Atkinson Hyperlegible", Verdana, "Trebuchet MS", system-ui, sans-serif;
}

/* nessuna animazione per chi la disattiva a livello di sistema */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{ transition-duration:.01ms !important; animation-duration:.01ms !important; }
}

.skip{ position:absolute; left:-999px; top:0; background:var(--brand-bg); color:var(--on-brand);
  padding:.6rem 1rem; z-index:100; }
.skip:focus{ left:0; }

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

:focus-visible{ outline:3px solid var(--focus); outline-offset:2px; border-radius:4px; }

main{ max-width:800px; margin:0 auto; padding:1.4rem 1.1rem 3rem; }
h1{ font-size:calc(1.7rem * var(--ui-scale)); line-height:1.25; }
h2{ font-size:calc(1.3rem * var(--ui-scale)); }
.lead strong{ color:var(--fg); }

form{ margin-top:1.5rem; }
.field{ margin-bottom:1.2rem; }
.grid{ display:grid; grid-template-columns:1fr 1fr; gap:1.2rem; }
@media (max-width:560px){ .grid{ grid-template-columns:1fr; } }

label{ display:block; font-weight:600; margin-bottom:.35rem; }

/* target ≥ 24×24 (WCAG 2.2 AA 2.5.8): checkbox e radio ingranditi */
.checkbox{ display:flex; align-items:flex-start; gap:.6rem; }
.checkbox label{ font-weight:400; margin:0; }
.checkbox input[type=checkbox]{ width:1.5rem; height:1.5rem; margin-top:.15rem; flex:none;
  accent-color:var(--accent); }

.sourcetype{ border:2px solid var(--field-bd); border-radius:10px; padding:.6rem .9rem 1rem; }
.sourcetype legend{ font-weight:600; padding:0 .4rem; }
.radio{ display:flex; align-items:center; gap:.6rem; margin-top:.5rem; }
.radio label{ font-weight:400; margin:0; }
.radio input[type=radio]{ width:1.5rem; height:1.5rem; flex:none; accent-color:var(--accent); }

input[type=text], input[type=email], select, input[type=file], textarea{
  width:100%; font:inherit; padding:.6rem .7rem; color:var(--fg); background:var(--bg);
  border:2px solid var(--field-bd); border-radius:8px; min-height:44px; }
textarea{ min-height:6rem; }
input[type=file]{ padding:.5rem; }
input[aria-invalid="true"], textarea[aria-invalid="true"], select[aria-invalid="true"]{
  border-color:var(--err); border-width:3px; }
.help{ margin:.35rem 0 0; font-size:.9em; color:var(--muted); }
.field-error{ margin:.35rem 0 0; font-size:.92em; color:var(--err); font-weight:600; }

.btn-primary, .btn-secondary{
  display:inline-block; font:inherit; font-weight:600; cursor:pointer; text-decoration:none;
  padding:.7rem 1.2rem; border-radius:10px; min-height:48px; border:2px solid transparent; }
.btn-primary{ background:var(--accent); color:var(--on-accent); border-color:var(--accent); }
.btn-primary:hover{ filter:brightness(1.06); }
.btn-secondary{ background:transparent; color:var(--brand); border-color:var(--brand); }
button[disabled], a[aria-disabled=true]{ opacity:.6; cursor:not-allowed; }

/* stato / avanzamento */
#status-panel, #result-panel{ margin-top:2rem; background:var(--card); border:1px solid var(--field-bd);
  border-radius:12px; padding:1.1rem 1.2rem; }
.progress-wrap{ display:flex; align-items:center; gap:.8rem; }
#progressbar{ flex:1; height:1.4rem; background:var(--bg); border-radius:999px;
  border:2px solid var(--field-bd); overflow:hidden; }
#progress-fill{ display:block; height:100%; width:0%; background:var(--accent); transition:width .3s; }
#progress-pct{ font-variant-numeric:tabular-nums; font-weight:700; min-width:3.2ch; text-align:right; }
.status-text{ margin:.7rem 0 0; font-weight:600; }
.status-text.error{ color:var(--err); }

.metrics{ display:grid; grid-template-columns:auto 1fr; gap:.3rem 1rem; margin:.4rem 0 1rem; }
.metrics dt{ font-weight:600; color:var(--muted); }
.metrics dd{ margin:0; }
.actions{ display:flex; gap:.8rem; flex-wrap:wrap; }

.sr-only{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; }

/* ---- intestazione/footer in stile universitainclusiva.it ---- */
.site-header{ background:var(--brand-bg); color:var(--on-brand); border-bottom:3px solid var(--accent); }
.site-header-in{ max-width:960px; margin:0 auto; padding:.6rem 1.1rem; display:flex;
  align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; }
.site-logo{ display:flex; align-items:center; gap:.7rem; color:var(--on-brand); text-decoration:none; }
.site-logo img{ border-radius:8px; background:#fff; display:block; }
.site-titles{ display:flex; flex-direction:column; line-height:1.15; }
.site-name{ font-weight:800; font-size:1.15em; letter-spacing:.02em; }
.site-tagline{ font-size:.85em; }
.site-nav ul{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:.3rem .2rem; }
.site-nav a{ display:inline-block; color:var(--on-brand); text-decoration:underline; font-weight:600;
  font-size:.95em; padding:.5rem .7rem; border-radius:8px; min-height:24px; }
.site-nav a:hover{ background:rgba(255,255,255,.14); }
/* nell'header il ring giallo su fondo chiaro non basterebbe: doppio anello */
.site-header a:focus-visible{ outline:3px solid var(--focus); outline-offset:2px;
  box-shadow:0 0 0 6px rgba(0,0,0,.55); }

.site-footer{ background:var(--brand-bg); color:var(--on-brand); border-top:3px solid var(--accent);
  margin-top:2.5rem; }
.site-footer-in{ max-width:960px; margin:0 auto; padding:1.2rem 1.1rem; font-size:.95em; }
.site-footer a{ color:var(--on-brand); text-decoration:underline; }
.foot-tag{ font-weight:700; margin-top:0; }

@media (max-width:640px){
  .site-header-in{ flex-direction:column; align-items:flex-start; }
  .site-nav ul{ gap:.1rem; }
}

/* ---------------- barra di accessibilità (a11y.js) ---------------- */
.a11y-bar{ background:var(--card); border-bottom:2px solid var(--field-bd); }
.a11y-bar-in{ max-width:960px; margin:0 auto; padding:.4rem 1.1rem; display:flex;
  justify-content:flex-end; }
#a11y-toggle{ font:inherit; font-size:.95em; font-weight:600; cursor:pointer;
  background:var(--bg); color:var(--fg); border:2px solid var(--field-bd);
  border-radius:8px; padding:.4rem .8rem; min-height:36px; }
#a11y-panel{ max-width:960px; margin:0 auto; padding:.8rem 1.1rem 1rem; }
#a11y-panel[hidden]{ display:none; }
.a11y-group{ display:flex; align-items:center; gap:.5rem; flex-wrap:wrap;
  padding:.5rem 0; border-top:1px solid var(--field-bd); }
.a11y-group:first-of-type{ border-top:0; }
.a11y-group > .a11y-legend{ font-weight:700; font-size:.95em; min-width:9rem; }
.a11y-btn{ font:inherit; font-size:.95em; cursor:pointer; background:var(--bg); color:var(--fg);
  border:2px solid var(--field-bd); border-radius:8px; padding:.35rem .7rem;
  min-height:32px; min-width:32px; }
.a11y-btn[aria-pressed="true"]{ background:var(--accent); color:var(--on-accent);
  border-color:var(--accent); }
.a11y-btn[aria-pressed="true"]::after{ content:" ✓"; }   /* non solo colore */
.a11y-value{ font-variant-numeric:tabular-nums; font-weight:700; min-width:4.5ch; }

/* barra "chi è connesso" nella pagina dello strumento */
.session-bar{ display:flex; align-items:center; gap:.8rem; flex-wrap:wrap;
  margin:.2rem 0 1rem; padding:.5rem .8rem; background:var(--card);
  border:1px solid var(--field-bd); border-radius:8px; font-size:.95em; }
.btn-link{ font:inherit; font-size:1em; font-weight:600; cursor:pointer;
  background:none; border:2px solid transparent; color:var(--brand);
  text-decoration:underline; padding:.35rem .5rem; border-radius:6px;
  min-height:32px; min-width:32px; }
.btn-link:hover{ background:rgba(128,128,128,.12); }