/* Gestionale Istituto Pablo Neruda — foglio di stile unico, niente build step.
   Stile "Liquid Glass": superfici translucide con sfocatura, profondità
   morbida, barra di navigazione che galleggia.
   Accento configurabile dalla tavolozza in alto (default azzurro).
   Responsive: da iPhone 12 Pro (390px) al desktop.
     - >= 900px : sidebar di vetro a sinistra
     - < 900px  : barra di navigazione flottante in basso, tabelle a schede
   Fallback solidi dove manca backdrop-filter o l'utente riduce la trasparenza.
*/

:root {
  /* Colore d'interfaccia — scelto dalla tavolozza in alto (salvato in
     localStorage). Default: azzurro. Le altre tinte sono nei blocchi
     [data-tema=...] qui sotto. Tutte le sfumature/glow usano --accento-rgb
     e --accento-chiaro, cosi' basta cambiare qui. */
  --accento:        #1780c4;   /* azzurro */
  --accento-scuro:  #0e5f96;
  --accento-chiaro: #4bb6ee;
  --accento-tenue:  #e3f0fb;
  --accento-rgb:    20, 128, 196;

  /* inchiostro / neutri */
  --ink: #201c28;
  --muted: #6a6577;
  --line: rgba(30, 24, 45, .10);
  --line-forte: rgba(30, 24, 45, .18);

  /* vetro (barre di navigazione) */
  --glass: rgba(255, 255, 255, .62);
  --glass-forte: rgba(255, 255, 255, .78);
  --glass-tenue: rgba(255, 255, 255, .42);
  --glass-brd: rgba(255, 255, 255, .65);
  --glass-blur: 22px;
  --glass-sat: 1.7;

  /* riquadri (card, stat): superfici piene, bordo netto. Niente vetro:
     l'effetto liquid glass resta sulle barre di navigazione. */
  --card-bg: #ffffff;
  --card-brd: rgba(22, 24, 40, .12);
  --card-head-bg: rgba(22, 24, 40, .028);

  /* base sotto il vetro */
  --bg: #ffffff;
  --surface: #f3f0f7;

  /* stati */
  --ok: #0c7a44;        --ok-bg: rgba(18, 160, 92, .16);
  --warn: #8a5a00;      --warn-bg: rgba(200, 140, 0, .18);
  --err: #bf2626;       --err-bg: rgba(210, 55, 55, .16);
  --info: #1657b8;      --info-bg: rgba(30, 110, 220, .16);
  --neutro: #56516a;    --neutro-bg: rgba(60, 55, 90, .12);

  /* tinte categoria (badge sigla di categoria, cap. 018) — fisse, non
     legate al tema/accento scelto dall'utente */
  --giallo: #8a6d00;   --giallo-bg: rgba(230, 180, 0, .18);
  --viola:  #6b21a8;   --viola-bg:  rgba(147, 51, 234, .16);
  --verde:  #0c7a44;   --verde-bg:  rgba(18, 160, 92, .16);
  --rosa:   #a3005a;   --rosa-bg:   rgba(219, 39, 119, .16);
  --ciano:  #0e7490;   --ciano-bg:  rgba(6, 182, 212, .16);
  --arancio:#b45309;   --arancio-bg:rgba(217, 119, 6, .16);
  --blu:    #1657b8;   --blu-bg:    rgba(30, 110, 220, .16);
  --marrone:#78350f;   --marrone-bg:rgba(146, 64, 14, .16);

  --radius: 16px;
  --radius-sm: 11px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(28, 20, 45, .06), 0 2px 10px rgba(28, 20, 45, .05);
  --shadow: 0 2px 8px rgba(28, 20, 45, .07), 0 14px 40px rgba(28, 20, 45, .10);
  --shadow-glass: inset 0 1px 0 rgba(255, 255, 255, .55), 0 10px 34px rgba(40, 20, 60, .13);

  --s1: 4px;  --s2: 8px;  --s3: 12px;  --s4: 16px;
  --s5: 24px; --s6: 32px; --s7: 48px;

  --topbar-h: 58px;
  --botnav-h: 64px;
  --sidenav-w: 236px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

/* --- Tavolozza: tinte selezionabili ----------------------------------
   Azzurro e' tornato quello originale (richiesta esplicita). Grigio/
   giallo/rosso richiesti dall'utente; verde/viola aggiunti a scelta
   nostra, tenuti lontani dai colori fissi dei badge di categoria
   (cap. 8c/8d: ciano/blu/viola/arancio/rosa/verde/giallo/marrone). */
:root[data-tema="azzurro"] {
  --accento: #1780c4; --accento-scuro: #0e5f96; --accento-chiaro: #4bb6ee;
  --accento-tenue: #e3f0fb; --accento-rgb: 20, 128, 196;
}
:root[data-tema="grigio"] {
  --accento: #5a6172; --accento-scuro: #3d4351; --accento-chiaro: #89909f;
  --accento-tenue: #eeeff1; --accento-rgb: 90, 97, 114;
}
:root[data-tema="giallo"] {
  --accento: #ecb913; --accento-scuro: #b38d0f; --accento-chiaro: #eecd63;
  --accento-tenue: #f9f5e7; --accento-rgb: 236, 185, 19;
}
:root[data-tema="rosso"] {
  --accento: #c5202e; --accento-scuro: #991520; --accento-chiaro: #e05c67;
  --accento-tenue: #f8e7e9; --accento-rgb: 197, 32, 46;
}
:root[data-tema="verde"] {
  --accento: #53bf1d; --accento-scuro: #3c9112; --accento-chiaro: #84e156;
  --accento-tenue: #edf8e7; --accento-rgb: 83, 191, 29;
}
:root[data-tema="viola"] {
  --accento: #bf1dbf; --accento-scuro: #911291; --accento-chiaro: #e156e1;
  --accento-tenue: #f8e7f8; --accento-rgb: 191, 29, 191;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f2eef7;
    --muted: #a49fb4;
    --line: rgba(255, 255, 255, .12);
    --line-forte: rgba(255, 255, 255, .22);

    --glass: rgba(40, 34, 54, .55);
    --glass-forte: rgba(48, 41, 64, .74);
    --glass-tenue: rgba(40, 34, 54, .36);
    --glass-brd: rgba(255, 255, 255, .14);

    --card-bg: #221d2e;
    --card-brd: rgba(255, 255, 255, .12);
    --card-head-bg: rgba(255, 255, 255, .045);

    --bg: #17141f;
    --surface: #100d17;

    --accento-tenue: rgba(var(--accento-rgb), .22);

    --ok-bg: rgba(18, 160, 92, .22);
    --warn-bg: rgba(200, 140, 0, .24);
    --err-bg: rgba(210, 55, 55, .24);
    --info-bg: rgba(60, 130, 240, .24);
    --neutro-bg: rgba(255, 255, 255, .10);

    --giallo-bg: rgba(230, 180, 0, .24);
    --viola-bg: rgba(147, 51, 234, .24);
    --verde-bg: rgba(18, 160, 92, .22);
    --rosa-bg: rgba(219, 39, 119, .24);
    --ciano-bg: rgba(6, 182, 212, .24);
    --arancio-bg: rgba(217, 119, 6, .24);
    --blu-bg: rgba(60, 130, 240, .24);
    --marrone-bg: rgba(180, 100, 40, .24);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow: 0 2px 8px rgba(0, 0, 0, .35), 0 16px 44px rgba(0, 0, 0, .45);
    --shadow-glass: inset 0 1px 0 rgba(255, 255, 255, .12), 0 12px 38px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { max-width: 100%; overflow-x: hidden; }
svg { max-width: 100%; }
img { max-width: 100%; height: auto; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
  background:
    radial-gradient(42rem 42rem at 88% -8%, rgba(var(--accento-rgb), .18), transparent 60%),
    radial-gradient(38rem 38rem at -6% 8%, rgba(60, 120, 240, .16), transparent 58%),
    radial-gradient(46rem 46rem at 50% 118%, rgba(120, 60, 220, .16), transparent 60%),
    var(--surface);
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--accento); text-decoration: none; }
a:hover { text-decoration: underline; }
@media (prefers-color-scheme: dark) { a { color: var(--accento-chiaro); } }

h1, h2, h3 { margin: 0 0 var(--s3); line-height: 1.24; font-weight: 680; letter-spacing: -.01em; }
h1 { font-size: 13px; font-weight: 700; letter-spacing: 0; margin-bottom: 4px; text-transform: uppercase; }
h2 { font-size: 17px; }
h3 { font-size: 15px; }

/* superficie di vetro riusabile */
.glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-brd);
}

/* =====================================================================
   LAYOUT
   ===================================================================== */
.app {
  display: grid;
  grid-template-columns: var(--sidenav-w) minmax(0, 1fr);
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas: "brand topbar" "nav main";
  min-height: 100vh;
  min-height: 100dvh;
}
.main, .topbar { min-width: 0; }

.brand {
  grid-area: brand;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s2);
  padding: 0 var(--s4);
  font-weight: 750;
  letter-spacing: -.01em;
  color: var(--ink) !important;
  font-size: 14px;
  text-decoration: none !important;
  background: var(--glass-forte);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.brand-logo { display: block; height: 42px; width: auto; max-width: 100%; }
.brand-grande .brand-logo { height: 64px; }
/* il bordeaux del logo scivola lentamente verso il blu scuro del brand e
   torna indietro, in loop */
@keyframes logo-tinta {
  0%, 100% { filter: hue-rotate(0deg); }
  50%      { filter: hue-rotate(-136deg); }
}
.brand-logo { animation: logo-tinta 12s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) {
  .brand-logo { animation: none; }
}
.brand-mobile { display: none; }

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s3);
  padding: 0 var(--s5);
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--glass);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-bottom: 1px solid var(--line);
}
.page-name { display: none; }

.sidenav {
  grid-area: nav;
  padding: var(--s4) var(--s3);
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: var(--glass-tenue);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-right: 1px solid var(--line);
}
.sidenav a {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: 10px var(--s3);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-weight: 550;
  font-size: 13px;
  text-transform: uppercase;
  min-height: 42px;
  transition: background .16s, transform .16s;
}
.sidenav a:hover { background: var(--glass-forte); text-decoration: none; }
.sidenav a.attivo {
  background: linear-gradient(135deg, rgba(var(--accento-rgb), .16), rgba(var(--accento-rgb), .08));
  color: var(--accento-scuro);
  box-shadow: inset 0 0 0 1px rgba(var(--accento-rgb), .22);
}
@media (prefers-color-scheme: dark) { .sidenav a.attivo { color: var(--accento-chiaro); } }
.sidenav a svg { width: 18px; height: 18px; flex: none; opacity: .9; }

.main {
  grid-area: main;
  padding: var(--s3) var(--s6) var(--s5);
  max-width: 1180px;
  width: 100%;
}

.botnav { display: none; }

/* utente in topbar */
.userbox { display: flex; align-items: center; gap: var(--s3); font-size: 13px; }
.userbox .chip {
  display: inline-flex; align-items: center; gap: var(--s2);
  padding: 5px var(--s3);
  border-radius: var(--radius-pill);
  background: var(--glass-forte);
  color: inherit !important;
  transition: background .15s;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-brd);
}
.userbox .chip svg { width: 15px; height: 15px; }
.userbox .chip:hover { background: rgba(var(--accento-rgb), .14); }
.userbox .ruolo { color: var(--muted); text-transform: capitalize; }

/* tavolozza dei colori */
.tavolozza { position: relative; display: flex; }
.tavolozza-btn { padding: 8px; }
.tavolozza-menu[hidden] { display: none; }
.tavolozza-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  display: flex; gap: var(--s2);
  padding: var(--s2) var(--s3);
  border-radius: var(--radius-sm);
  background: var(--glass-forte);
  -webkit-backdrop-filter: blur(22px) saturate(1.7);
  backdrop-filter: blur(22px) saturate(1.7);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow-glass);
  z-index: 40;
}
.tavolozza-menu button {
  width: 28px; height: 28px; padding: 0;
  border-radius: 50%;
  border: 2px solid var(--glass-brd);
  background: var(--sw);
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), 0 2px 6px rgba(0, 0, 0, .18);
  transition: transform .12s;
}
.tavolozza-menu button:hover { transform: scale(1.14); }
.tavolozza-menu button[aria-current="true"] {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

/* =====================================================================
   TESTATA PAGINA
   ===================================================================== */
.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--s4); margin-bottom: var(--s4);
}
.page-head .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: var(--s3); }
.crumbs a { color: var(--muted); }

/* =====================================================================
   CARD — lastra di vetro
   ===================================================================== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-brd);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;   /* i figli (header, tabella) seguono gli angoli arrotondati */
  display: flex;
  flex-direction: column;
}
.card + .card { margin-top: var(--s5); }
.card > .card-head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s3);
  padding: var(--s3) var(--s4);
  background: var(--card-head-bg);
  border-bottom: 1px solid var(--card-brd);
  font-weight: 640;
  flex-wrap: wrap;
}
.card > .card-body { padding: var(--s4); flex: 1 1 auto; }
.card > .card-body.tight { padding: 0; }

/* .grid-2/.grid-3: align-items stretch cosi' le card affiancate hanno la
   stessa altezza (es. Anagrafica / Contatti nella scheda studente), anche
   quando il contenuto non e' lungo uguale. */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s5); align-items: stretch; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s4); align-items: start; }
/* dentro una griglia i riquadri sono distanziati dal gap, mai dal margine */
.grid-2 > .card + .card, .grid-3 > .card + .card { margin-top: 0; }
/* la griglia stessa, come blocco, si distanzia da cio' che segue */
.grid-2 + *, .grid-3 + * { margin-top: var(--s5); }

.stat {
  display: block;
  padding: var(--s4);
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--card-brd);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
}
a.stat { cursor: pointer; transition: box-shadow .15s, transform .15s, border-color .15s; }
a.stat:hover { box-shadow: var(--shadow); transform: translateY(-1px); border-color: rgba(var(--accento-rgb), .35); text-decoration: none; }
.stat .k { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.stat .v { font-size: 23px; font-weight: 720; margin-top: var(--s1); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.stat .v.accento { color: var(--accento); }
@media (prefers-color-scheme: dark) { .stat .v.accento { color: var(--accento-chiaro); } }

/* =====================================================================
   TABELLE
   ===================================================================== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius); }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td {
  text-align: left;
  padding: 11px var(--s3);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
table.data thead th {
  background: var(--glass-tenue);
  color: var(--muted);
  font-weight: 640;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
table.data tbody tr { transition: background .14s; }
table.data tbody tr:hover { background: var(--accento-tenue); }
table.data td svg { width: 16px; height: 16px; vertical-align: middle; }
table.data td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.wrap { white-space: normal; }
table.data .riga-link { cursor: pointer; }
table.data tbody tr:last-child td { border-bottom: 0; }
.empty { padding: var(--s6); text-align: center; color: var(--muted); }

/* =====================================================================
   BADGE
   ===================================================================== */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  font-size: 11.5px;
  font-weight: 640;
  line-height: 1.7;
  white-space: nowrap;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.ok      { color: var(--ok);     background: var(--ok-bg); }
.badge.warn    { color: var(--warn);   background: var(--warn-bg); }
.badge.err     { color: var(--err);    background: var(--err-bg); }
.badge.info    { color: var(--info);   background: var(--info-bg); }
.badge.neutro  { color: var(--neutro); background: var(--neutro-bg); }
.badge.giallo  { color: var(--giallo); background: var(--giallo-bg); }
.badge.viola   { color: var(--viola);  background: var(--viola-bg); }
.badge.verde   { color: var(--verde);  background: var(--verde-bg); }
.badge.rosa    { color: var(--rosa);   background: var(--rosa-bg); }
.badge.ciano   { color: var(--ciano);  background: var(--ciano-bg); }
.badge.arancio { color: var(--arancio);background: var(--arancio-bg); }
.badge.blu     { color: var(--blu);    background: var(--blu-bg); }
.badge.marrone { color: var(--marrone);background: var(--marrone-bg); }
.badge.plain::before { display: none; }
@media (prefers-color-scheme: dark) {
  .badge.ok { color: #4fd39a; } .badge.warn { color: #f0b64c; }
  .badge.err { color: #ff8a8a; } .badge.info { color: #7db4ff; } .badge.neutro { color: #c8c3d8; }
  .badge.giallo { color: #f0d060; } .badge.viola { color: #c199f5; }
  .badge.verde { color: #4fd39a; } .badge.rosa { color: #ff7ec2; }
  .badge.ciano { color: #5fd4ea; } .badge.arancio { color: #f5a85c; }
  .badge.blu { color: #7db4ff; } .badge.marrone { color: #d19a6a; }
}

/* =====================================================================
   FORM
   ===================================================================== */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s4) var(--s5); min-width: 0; }
.form-grid .full { grid-column: 1 / -1; }
.card, .card-body, .toolbar { min-width: 0; }
select { max-width: 100%; }

.field { display: flex; flex-direction: column; gap: var(--s1); min-width: 0; }
.field[hidden] { display: none; }
.field > label { font-weight: 620; font-size: 12.5px; }
.field > label .req { color: var(--accento); margin-left: 2px; }
.field .hint { color: var(--muted); font-size: 12px; }
.field .err-msg { color: var(--err); font-size: 12px; }

input[type=text], input[type=email], input[type=tel], input[type=password],
input[type=date], input[type=number], input[type=search], select, textarea {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  font-size: 16px;                 /* >=16px: iOS non zooma sul focus */
  color: var(--ink);
  background: var(--glass-forte);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-forte);
  border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder, textarea::placeholder { color: var(--muted); opacity: .8; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accento);
  box-shadow: 0 0 0 4px var(--accento-tenue);
}
.field.invalid input, .field.invalid select { border-color: var(--err); }
.field.invalid input:focus { box-shadow: 0 0 0 4px var(--err-bg); }
textarea { min-height: 82px; resize: vertical; }

input[type=file] {
  width: 100%;
  font: inherit; font-size: 14px;
  color: var(--ink);
  padding: 8px 10px;
  background: var(--glass-forte);
  border: 1px dashed var(--line-forte);
  border-radius: var(--radius-sm);
}
input[type=file]::file-selector-button {
  font: inherit; font-weight: 640; font-size: 13px;
  margin-right: 10px;
  padding: 7px 12px;
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius-pill);
  background: var(--glass-forte);
  color: var(--ink);
  cursor: pointer;
}

.check { flex-direction: row; align-items: center; gap: var(--s2); }
.check input { width: 21px; height: 21px; accent-color: var(--accento); flex: none; }
.check label { font-weight: 520; }

.form-actions {
  display: flex; gap: var(--s3); align-items: center; flex-wrap: wrap;
  margin-top: var(--s5); padding-top: var(--s4);
  border-top: 1px solid var(--line);
}

/* =====================================================================
   BOTTONI — vetro lucido, target touch >= 44px
   ===================================================================== */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s2);
  padding: 11px 18px;
  min-height: 42px;
  font: inherit; font-weight: 640; font-size: 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-brd);
  background: var(--glass-forte);
  -webkit-backdrop-filter: blur(12px) saturate(1.6);
  backdrop-filter: blur(12px) saturate(1.6);
  color: var(--ink);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .08s, box-shadow .16s, background .16s;
}
.btn:hover { text-decoration: none; box-shadow: var(--shadow); }
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(145deg, var(--accento-chiaro), var(--accento) 60%, var(--accento-scuro));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), 0 6px 20px rgba(var(--accento-rgb), .38);
}
.btn-primary:hover { box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), 0 10px 28px rgba(var(--accento-rgb), .46); }
.btn-ghost { border-color: transparent; background: transparent; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
.btn-ghost:hover { background: var(--glass-forte); box-shadow: none; }
.btn-sm { padding: 8px 13px; min-height: 36px; font-size: 13px; }
.btn-danger { color: var(--err); }
.btn-danger:hover { background: var(--err-bg); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn svg { width: 16px; height: 16px; }

/* =====================================================================
   RICERCA / TOOLBAR
   ===================================================================== */
.toolbar { display: flex; gap: var(--s3); align-items: center; flex-wrap: wrap; margin-bottom: var(--s4); }
/* quando la toolbar e' l'unico contenuto del card-body (form di ricerca
   da solo, senza una tabella subito sotto nello stesso riquadro) il
   margine sotto e' ridondante col padding del card-body: via */
.card-body > .toolbar:only-child { margin-bottom: 0; }
.card-body:has(> .toolbar:only-child) { padding-bottom: var(--s2); }
.search { position: relative; flex: 1 1 220px; max-width: 420px; }
.search input {
  padding-left: 38px;
  /* input type="search" ha uno stile nativo diverso per browser (Safari
     in particolare aggiunge padding/margini propri): lo azzeriamo cosi'
     l'icona e il testo restano allineati come previsto ovunque. */
  -webkit-appearance: none;
  appearance: none;
}
.search input::-webkit-search-decoration,
.search input::-webkit-search-cancel-button,
.search input::-webkit-search-results-button,
.search input::-webkit-search-results-decoration { display: none; }
.search svg {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--muted); pointer-events: none;
}

/* =====================================================================
   FLASH
   ===================================================================== */
.flash-stack { display: flex; flex-direction: column; gap: var(--s2); margin-bottom: var(--s4); }
.flash {
  padding: var(--s3) var(--s4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-brd);
  font-size: 14px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.flash.ok    { background: var(--ok-bg);   color: var(--ok); }
.flash.error { background: var(--err-bg);  color: var(--err); }
.flash.info  { background: var(--info-bg); color: var(--info); }
@media (prefers-color-scheme: dark) {
  .flash.ok { color: #7fe0b4; } .flash.error { color: #ff9d9d; } .flash.info { color: #9cc5ff; }
}

/* =====================================================================
   CHIAVE-VALORE / FASI / PROGRESS
   ===================================================================== */
.kv { display: grid; grid-template-columns: 190px 1fr; gap: var(--s2) var(--s4); font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }

.fasi { list-style: none; margin: 0; padding: 0; }
.fasi li { display: flex; flex-wrap: wrap; align-items: flex-start; gap: var(--s2) var(--s3); padding: var(--s3) 0; border-bottom: 1px solid var(--line); }
.fasi li:last-child { border-bottom: 0; }
.fasi li > div { min-width: 0; }
/* il pallino della fase corrente e' un bottone (dentro un form): stesso
   posto del pallino statico, niente spostamento a destra. */
.fasi li > form { flex: none; margin: 0; }
.fasi .tick {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--line-forte); flex: none; margin-top: 1px;
  display: grid; place-items: center;
}
.fasi li.fatta .tick {
  background: linear-gradient(145deg, #16b06a, var(--ok));
  border-color: transparent; color: #fff;
  box-shadow: 0 2px 8px rgba(12, 122, 68, .4);
}
.fasi li.fatta .nome { color: var(--muted); }
.fasi .meta { color: var(--muted); font-size: 12px; margin-top: 2px; }
.fasi .tick svg { width: 14px; height: 14px; }
.tick-btn {
  appearance: none; padding: 0; background: var(--card-bg); cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
}
.tick-btn:hover { border-color: var(--accento); background: rgba(var(--accento-rgb), .12); }
.tick-btn:active { transform: scale(.9); }

.progress { height: 11px; background: var(--neutro-bg); border-radius: var(--radius-pill); overflow: hidden; min-width: 100px; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--accento-chiaro), var(--accento)); border-radius: inherit; }
.avanzamento-wrap { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }

/* =====================================================================
   LOGIN
   ===================================================================== */
.login-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh; min-height: 100dvh;
  width: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--s5);
}

/* --- sfondo animato: macchie di luce che respirano + simboli scolastici
   (tocco, libro, matita) che salgono lentamente, tipo "live wallpaper" --- */
.login-bg {
  position: fixed; inset: 0;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .6;
  animation: orb-respira ease-in-out infinite;
}
.orb-1 { width: 32rem; height: 32rem; top: -12%; left: -10%;
  background: rgba(var(--accento-rgb), .30); animation-duration: 24s; }
.orb-2 { width: 28rem; height: 28rem; bottom: -14%; right: -8%;
  background: rgba(122, 31, 61, .24); animation-duration: 30s; animation-delay: -8s; }
.orb-3 { width: 24rem; height: 24rem; top: 42%; left: 62%;
  background: rgba(60, 120, 240, .20); animation-duration: 27s; animation-delay: -16s; }
@keyframes orb-respira {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(4%, 6%) scale(1.1); }
  66%      { transform: translate(-5%, -3%) scale(0.93); }
}
@media (prefers-color-scheme: dark) {
  .orb-1 { background: rgba(var(--accento-rgb), .34); }
  .orb-2 { background: rgba(200, 90, 130, .22); }
  .orb-3 { background: rgba(80, 140, 255, .22); }
}
/* icone a tema studio/certificazione che attraversano lo sfondo: grandi
   ma appena percettibili, non devono competere con la card di login */
.drift {
  position: absolute;
  bottom: -24vh;
  width: 160px; height: 160px;
  color: var(--ink);
  opacity: 0;
  animation: drift-su linear infinite;
}
.drift-1 { left: 4%;   width: 180px; animation-duration: 38s; animation-delay: 0s; }
.drift-2 { left: 70%;  width: 150px; animation-duration: 46s; animation-delay: -14s; }
.drift-3 { left: 40%;  width: 120px; animation-duration: 32s; animation-delay: -25s; }
.drift-4 { left: 86%;  width: 200px; animation-duration: 52s; animation-delay: -38s; }
@keyframes drift-su {
  0%   { transform: translateY(0) rotate(0deg); opacity: 0; }
  15%  { opacity: .08; }
  85%  { opacity: .08; }
  100% { transform: translateY(-140vh) rotate(12deg); opacity: 0; }
}
@media (prefers-color-scheme: dark) { .drift { color: var(--ink); } }
@media (prefers-reduced-motion: reduce) {
  .orb, .drift { animation: none; }
  .drift { display: none; }
}
.login-card {
  width: 100%; max-width: 400px;
  padding: var(--s6);
  border-radius: 22px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(30px) saturate(1.8);
  backdrop-filter: blur(30px) saturate(1.8);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--shadow-glass);
}
.login-card .brand { border: 0; padding: 0; margin-bottom: var(--s5); background: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
.titolo-login-box {
  display: inline-block;
  color: var(--ink);
  background: transparent;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-weight: 640;
}
.login-card .field + .field { margin-top: var(--s4); }
.login-card .btn-primary { width: 100%; margin-top: var(--s5); }

/* =====================================================================
   MISC
   ===================================================================== */
.muted { color: var(--muted); }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.mt-0 { margin-top: 0; }
.tag-area { font-size: 11px; text-transform: capitalize; }
.chip-actions { display: flex; gap: var(--s2); flex-wrap: wrap; }
.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;
}

/* =====================================================================
   TABLET  (< 900px) — nav flottante in basso
   ===================================================================== */
@media (max-width: 899px) {
  /* il logo sopra basta: niente titolo ripetuto sotto, su schermo piccolo */
  .titolo-login { display: none; }

  .app {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: var(--topbar-h) 1fr;
    grid-template-areas: "topbar" "main";
  }
  /* solo la barra del logo della sidebar, non il logo grande di
     login/errore (stessa classe .brand, contesto diverso) */
  .app > .brand, .sidenav { display: none; }

  .topbar { padding: 0 var(--s4); padding-top: var(--safe-t); }
  .topbar-titolo { display: flex; align-items: center; min-width: 0; }
  .brand-mobile { display: flex; align-items: center; flex: none; }
  .brand-mobile .brand-logo { height: 36px; }

  .main {
    padding: var(--s2) var(--s4) var(--s4);
    padding-bottom: calc(var(--botnav-h) + var(--safe-b) + var(--s6));
  }

  .botnav {
    display: flex;
    position: fixed;
    left: var(--s3); right: var(--s3);
    bottom: calc(var(--safe-b) + var(--s2));
    z-index: 30;
    border-radius: 24px;
    padding: 6px;
    gap: 2px;
    background: var(--glass-forte);
    -webkit-backdrop-filter: blur(26px) saturate(1.8);
    backdrop-filter: blur(26px) saturate(1.8);
    border: 1px solid var(--glass-brd);
    box-shadow: var(--shadow-glass);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
  }
  .botnav::-webkit-scrollbar { display: none; }
  .botnav a {
    flex: 1 0 66px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 3px;
    padding: 8px 4px;
    min-height: calc(var(--botnav-h) - 12px);
    border-radius: 18px;
    color: var(--muted);
    font-size: 10.5px;
    font-weight: 640;
    text-decoration: none;
    transition: background .16s, color .16s;
  }
  .botnav a svg { width: 24px; height: 24px; }
  .botnav a.attivo {
    color: var(--accento);
    background: linear-gradient(135deg, rgba(var(--accento-rgb), .18), rgba(var(--accento-rgb), .08));
  }
  @media (prefers-color-scheme: dark) { .botnav a.attivo { color: var(--accento-chiaro); } }
  .botnav a span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  .grid-2 { grid-template-columns: 1fr; gap: var(--s4); }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; gap: var(--s4); }

  .userbox .chip-nome, .userbox .ruolo { display: none; }
  .page-head { flex-direction: column; gap: var(--s3); align-items: stretch; }
  .page-head .btn, .page-head form { width: 100%; }
  .search { max-width: none; }
  .toolbar { gap: var(--s2); }

  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dt { font-size: 12px; }
  .kv dd { margin-bottom: var(--s3); }
  .kv dd:last-child { margin-bottom: 0; }

  /* tabelle -> schede impilate */
  table.data.responsive thead { display: none; }
  table.data.responsive,
  table.data.responsive tbody,
  table.data.responsive tr,
  table.data.responsive td { display: block; }
  table.data.responsive tr {
    border: 1px solid var(--card-brd);
    border-radius: var(--radius-sm);
    margin: var(--s3) var(--s3);
    padding: var(--s1) 0;
    background: var(--card-head-bg);
  }
  table.data.responsive tr:hover { background: var(--card-head-bg); }
  table.data.responsive td {
    display: block;
    border: 0;
    border-top: 1px solid var(--line);
    padding: 9px var(--s4);
    white-space: normal !important;
    text-align: left;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  table.data.responsive tr td:first-child { border-top: 0; }
  table.data.responsive td.num { text-align: left; }
  table.data.responsive td::before {
    content: attr(data-label);
    display: block;
    color: var(--muted);
    font-size: 11px;
    font-weight: 640;
    text-transform: uppercase;
    letter-spacing: .03em;
    margin-bottom: 2px;
  }
  /* celle senza contenuto d'etichetta */
  table.data.responsive td[data-label=""]::before,
  table.data.responsive td:not([data-label])::before { content: none; }
  table.data.responsive td[data-label=""]:empty { display: none; }
  /* la freccetta di navigazione e le righe segnaposto: via sulle schede */
  table.data.responsive tr td.riga-vuota,
  table.data.responsive tr td.chevron { display: none; }
  table.data.responsive td.empty { text-align: center; padding: var(--s5); }
  table.data.responsive td.empty::before { content: none; }
  /* barra di avanzamento su tutta la larghezza della scheda, non 100px fissi */
  table.data.responsive td .avanzamento-wrap { display: flex; width: 100%; }
  table.data.responsive td .avanzamento-wrap .progress { flex: 1 1 auto; min-width: 0; }
}

/* =====================================================================
   MOBILE stretto  (<= 400px : iPhone 12 Pro)
   ===================================================================== */
@media (max-width: 400px) {
  body { font-size: 14px; }
  .main { padding: var(--s1) var(--s3) var(--s3); padding-bottom: calc(var(--botnav-h) + var(--safe-b) + var(--s6)); }
  .card > .card-body { padding: var(--s3); }
  .grid-3 { grid-template-columns: 1fr; }
  .botnav { left: var(--s2); right: var(--s2); }
  .botnav a span { font-size: 10px; }
  table.data.responsive tr { margin: var(--s3); }
}

/* =====================================================================
   FALLBACK — niente sfocatura o trasparenza ridotta -> superfici solide
   ===================================================================== */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  :root {
    --glass: var(--bg);
    --glass-forte: var(--bg);
    --glass-tenue: var(--surface);
  }
  body { background: var(--surface); }
}
@media (prefers-reduced-transparency: reduce) {
  :root {
    --glass: var(--bg);
    --glass-forte: var(--bg);
    --glass-tenue: var(--surface);
    --glass-blur: 0px;
  }
  body { background: var(--surface); }
  .btn-primary { background: var(--accento); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}