/* =====================================================================
   SISTEMA VISIVO — Calcolo Codice Fiscale (blueprint §19)
   "Quiet-luxury fintech": preciso, onesto, calmo, sicuro.
   Tema chiaro UNICO (dark mode rifiutato in v1, §19). Nessun font esterno,
   nessuno asset esterno. Mobile-first 320px -> desktop.
   ===================================================================== */

:root{
  --verde:#0E6B4A;          /* primario / azione: "fiscal green" */
  --verde-scuro:#0A5339;
  --verde-tinta:#EAF4EE;    /* sfondi soft */
  --inchiostro:#1A2230;     /* quasi-nero caldo */
  --inchiostro-2:#5B6575;   /* secondario: label, helper */
  --superficie:#FFFFFF;
  --sfondo:#F5F7FA;
  --bordo:#E4E9F0;          /* hairline */
  --bordo-input:#CBD3DF;
  --risultato-da:#F0F7F3;   /* wash della card risultato */
  --successo:#0E6B4A;
  --avviso:#B45309;
  --errore:#B42318;
  --info:#1D4ED8;
  /* famiglie cromatiche del breakdown (sempre con etichetta, mai solo colore — §18) */
  --seg-cognome:#2563EB;
  --seg-nome:#1E40AF;
  --seg-data:#B45309;
  --seg-sesso:#0E6B4A;
  --seg-luogo:#6D28D9;
  --seg-controllo:#BE123C;
  --raggio:12px;
  --ombra:0 1px 2px rgba(26,34,48,.05),0 8px 24px rgba(26,34,48,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-serif:Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.5;
  color:var(--inchiostro);background:var(--sfondo);
}
h1,h2,h3{line-height:1.25;margin:1.6em 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(28px,5.5vw,34px);font-weight:700}
.hero h1{font-family:var(--font-serif)}          /* serif solo H1 hero, §19 */
h2{font-size:20px;font-weight:700}
h3{font-size:17px;font-weight:700}
p{margin:.7em 0}
a{color:var(--verde);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--verde-scuro)}
img,svg,canvas{max-width:100%;height:auto}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}

/* ---------- focus visibile ovunque (§18) ---------- */
:focus-visible{outline:3px solid var(--verde);outline-offset:2px;border-radius:6px}

/* ---------- utilità ---------- */
.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}
.lbl-mini{display:block;font-size:13px;color:var(--inchiostro-2);margin:0 0 4px}
.lbl-inline{display:inline;font-weight:400}
.seg-wide{max-width:440px}
.input-mono{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.06em}
.left{text-align:left}
.start{justify-content:flex-start}
.m0{margin:0}
.mt6{margin:.6em 0 0}
.tiny{font-size:11px}

/* ---------- header ---------- */
.site-header{background:var(--superficie);border-bottom:1px solid var(--bordo);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:12px;min-height:60px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--inchiostro);font-weight:700}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--verde);color:#fff;display:grid;place-items:center;font-family:var(--font-mono);font-weight:700;font-size:15px;flex:none}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--inchiostro-2)}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.main-nav a{display:block;padding:10px 12px;border-radius:8px;text-decoration:none;color:var(--inchiostro);font-weight:600;font-size:15px}
.main-nav a:hover{background:var(--verde-tinta);color:var(--verde-scuro)}
.main-nav a[aria-current="page"]{color:var(--verde);background:var(--verde-tinta)}

/* ---------- breadcrumb ---------- */
.crumbs{font-size:13px;color:var(--inchiostro-2);margin:14px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--bordo-input)}
.crumbs a{color:var(--inchiostro-2)}

/* ---------- layout contenuto ---------- */
.prose{max-width:760px}
.prose blockquote{border-left:4px solid var(--verde);background:var(--verde-tinta);margin:1.2em 0;padding:.9em 1.1em;border-radius:0 10px 10px 0}
.prose blockquote p{margin:.4em 0}
.prose table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:15px;display:block;overflow-x:auto;
  /* L-7: affordance di scorrimento orizzontale — ombre visibili solo dove c'è contenuto nascosto */
  background-image:linear-gradient(to right,#F5F7FA 30%,rgba(245,247,250,0)),linear-gradient(to left,#F5F7FA 30%,rgba(245,247,250,0)),radial-gradient(farthest-side at 0 50%,rgba(15,23,42,.16),rgba(15,23,42,0)),radial-gradient(farthest-side at 100% 50%,rgba(15,23,42,.16),rgba(15,23,42,0));
  background-repeat:no-repeat;background-size:40px 100%,40px 100%,14px 100%,14px 100%;
  background-position:0 0,100% 0,0 0,100% 0;background-attachment:local,local,scroll,scroll}
.prose thead th{background:var(--verde-tinta);text-align:left}
.prose th,.prose td{border:1px solid var(--bordo);padding:8px 10px;white-space:nowrap}
.prose table caption{text-align:left;font-weight:600;margin-bottom:.4em}
.prose code{font-family:var(--font-mono);font-size:.9em;background:#EEF1F6;padding:1px 6px;border-radius:6px}

/* ---------- hero tool-first ---------- */
.hero{padding:26px 0 8px}
.hero-sub{color:var(--inchiostro-2);font-size:17px;max-width:640px}
.badge-privacy{display:inline-flex;align-items:center;gap:8px;background:var(--verde-tinta);border:1px solid #CFE3D6;color:var(--verde-scuro);border-radius:999px;padding:7px 14px;font-size:14px;font-weight:600;margin:10px 0}
.badge-privacy svg{flex:none}

/* ---------- tab bar (firma del prodotto) ---------- */
.tabs{background:#EEF1F6;border-radius:14px;padding:4px;display:flex;gap:4px;margin:18px 0 0}
.tab{flex:1;text-align:center;padding:12px 8px;border-radius:10px;text-decoration:none;color:var(--inchiostro-2);font-weight:600;font-size:15px;min-height:48px;display:flex;align-items:center;justify-content:center;transition:background .12s,color .12s}
.tab:hover{color:var(--inchiostro)}
.tab[aria-selected="true"]{background:#fff;color:var(--verde);box-shadow:0 1px 3px rgba(26,34,48,.14);font-weight:700}

/* ---------- tool card ---------- */
.tool-card{background:var(--superficie);border:1px solid var(--bordo);border-radius:var(--raggio);box-shadow:var(--ombra);padding:20px;margin:14px 0 24px}
.tool-panel{padding-top:6px}
.disclaimer-top{font-size:13.5px;color:var(--inchiostro-2);background:#F0F4F8;border:1px solid var(--bordo);border-radius:10px;padding:10px 14px;margin:0 0 16px}
.field{margin:0 0 18px}
.field label,.field legend{display:block;font-size:14px;font-weight:600;color:var(--inchiostro-2);margin-bottom:7px}
.field fieldset{border:0;margin:0;padding:0}
.help{font-size:13px;color:var(--inchiostro-2);margin-top:6px}
input[type="text"],input[type="search"]{
  width:100%;min-height:48px;font-size:16px;font-family:var(--font);color:var(--inchiostro);
  border:1.5px solid var(--bordo-input);border-radius:10px;padding:10px 14px;background:#fff;
}
input:focus{border-color:var(--verde);outline:none;box-shadow:0 0 0 3px rgba(14,107,74,.18)}
input[aria-invalid="true"]{border-color:var(--errore)}
input[aria-invalid="true"]:focus{box-shadow:0 0 0 3px rgba(180,35,24,.16)}

/* data: tre segmenti digitabili */
.date-segs{display:flex;gap:8px;align-items:center}
.date-segs input{width:64px;text-align:center;font-family:var(--font-mono);font-size:18px;letter-spacing:.05em}
.date-segs input.anno{width:96px}
.date-sep{color:var(--inchiostro-2);font-weight:700}

/* segmented sesso */
.segmented{display:flex;background:#EEF1F6;border-radius:12px;padding:4px;gap:4px;max-width:340px}
.segmented label{flex:1;margin:0}
.segmented input{position:absolute;opacity:0;pointer-events:none}
.segmented span{display:flex;align-items:center;justify-content:center;min-height:48px;border-radius:9px;font-weight:600;color:var(--inchiostro-2);cursor:pointer;transition:background .12s,color .12s}
.segmented input:checked+span{background:#fff;color:var(--verde);box-shadow:0 1px 3px rgba(26,34,48,.14);font-weight:700}
.segmented input:focus-visible+span{outline:3px solid var(--verde);outline-offset:2px}

/* combobox luogo */
.combo{position:relative}
.combo-list{position:absolute;top:calc(100% + 4px);left:0;right:0;background:#fff;border:1px solid var(--bordo);border-radius:12px;box-shadow:var(--ombra);max-height:280px;overflow:auto;z-index:40;margin:0;padding:6px;list-style:none}
.combo-list[hidden]{display:none}
.combo-list li{padding:10px 12px;border-radius:8px;cursor:pointer;font-size:15px;display:flex;justify-content:space-between;gap:8px;align-items:baseline}
.combo-list li .code{font-family:var(--font-mono);font-size:13px;color:var(--inchiostro-2);background:#EEF1F6;padding:2px 8px;border-radius:6px;flex:none}
.combo-list li[aria-selected="true"],.combo-list li.active{background:var(--verde-tinta)}
.combo-list li small{color:var(--inchiostro-2);font-size:12.5px}
.combo-empty{padding:14px;color:var(--inchiostro-2);font-size:14px}
.luogo-scelto{display:flex;align-items:center;gap:10px;background:var(--verde-tinta);border:1px solid #CFE3D6;border-radius:10px;padding:10px 14px;margin-top:8px}
.luogo-scelto .code{font-family:var(--font-mono);font-weight:700;color:var(--verde-scuro)}
.luogo-scelto button{margin-left:auto}
.estero-panel{background:#FFFBEB;border:1px solid #F5DF9E;border-radius:10px;padding:12px 14px;font-size:14px;margin-top:10px;color:#7A4E0B}

/* ---------- bottoni ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:12px;font-size:16px;font-weight:600;border:0;cursor:pointer;text-decoration:none;transition:background .12s,transform .06s}
.btn-primary{background:var(--verde);color:#fff}
.btn-primary:hover{background:var(--verde-scuro);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:#fff;color:var(--verde);border:1.5px solid var(--verde)}
.btn-secondary:hover{background:var(--verde-tinta)}
.btn-ghost{background:transparent;color:var(--verde);padding:12px 14px}
.btn-ghost:hover{text-decoration:underline}
.btn[disabled]{opacity:.4;pointer-events:none}
.btn svg{flex:none}

/* ---------- errori che insegnano (§16) ---------- */
.err-msg{display:flex;gap:8px;font-size:14px;color:var(--errore);margin-top:7px;line-height:1.45}
.err-msg svg{flex:none;margin-top:2px}
.ok-msg{display:flex;gap:8px;font-size:14px;color:var(--verde-scuro);margin-top:7px}
.info-msg{display:flex;gap:8px;font-size:14px;color:var(--inchiostro-2);margin-top:7px}

/* ---------- result card ---------- */
.result-card{background:linear-gradient(180deg,var(--risultato-da),#fff 70%);border:1px solid var(--bordo);border-radius:var(--raggio);box-shadow:var(--ombra);padding:22px 20px;margin:20px 0;text-align:center}
.result-card h2,.result-card h3{margin-top:0}
.cf-code{font-family:var(--font-mono);font-weight:700;font-size:clamp(24px,7.2vw,32px);letter-spacing:.04em;margin:10px 0 4px;overflow-wrap:anywhere;color:var(--inchiostro);cursor:pointer;user-select:all}
.result-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:14px 0 6px}
.trust-line{font-size:13px;color:var(--inchiostro-2);margin:10px 0 0}
.result-warn{background:#FFFBEB;border:1px solid #F5DF9E;border-left:4px solid var(--avviso);border-radius:10px;padding:12px 14px;font-size:14px;text-align:left;margin:12px 0;color:#7A4E0B}
.result-warn a{color:#8A5A12}
.disclaimer-full{background:#F0F4F8;border:1px solid var(--bordo);border-left:4px solid var(--verde);border-radius:10px;padding:12px 14px;font-size:13.5px;text-align:left;margin:12px 0;color:var(--inchiostro-2)}
.result-empty{border:1.5px dashed var(--bordo-input);border-radius:var(--raggio);padding:26px 18px;color:var(--inchiostro-2);font-size:15px;margin:20px 0;text-align:center}

/* breakdown chips */
.chips{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:16px 0 4px}
.chip{width:44px;min-height:52px;border-radius:9px;border:1.5px solid;background:#fff;cursor:pointer;font-family:var(--font-mono);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;transition:transform .12s}
.chip b{font-size:17px}
.chip i{font-style:normal;font-size:10px;color:var(--inchiostro-2)}
.chip:hover{transform:translateY(-1px)}
.chip[aria-expanded="true"]{box-shadow:0 0 0 2px currentColor}
.chip.g-cognome{border-color:var(--seg-cognome);color:var(--seg-cognome);background:#EFF4FE}
.chip.g-nome{border-color:var(--seg-nome);color:var(--seg-nome);background:#EEF1FB}
.chip.g-data{border-color:var(--seg-data);color:var(--seg-data);background:#FBF3E8}
.chip.g-sesso{border-color:var(--seg-sesso);color:var(--seg-sesso);background:var(--verde-tinta)}
.chip.g-luogo{border-color:var(--seg-luogo);color:var(--seg-luogo);background:#F4EFFC}
.chip.g-controllo{border-color:var(--seg-controllo);color:var(--seg-controllo);background:#FCEEF1}
.chip-caption{background:#fff;border:1px solid var(--bordo);border-radius:10px;padding:12px 14px;font-size:14px;text-align:left;margin:8px 0;max-width:560px;margin-left:auto;margin-right:auto}
.chip-caption strong{display:block;margin-bottom:2px}
.chip-legend{display:flex;flex-wrap:wrap;gap:6px 14px;justify-content:center;font-size:12.5px;color:var(--inchiostro-2);margin-top:8px}
.chip-legend span{display:inline-flex;align-items:center;gap:5px}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block}
/* L-6: colori legenda breakdown spostati dall'inline style (CSP) */
.dot-cognome{background:#2563EB}.dot-nome{background:#1E40AF}.dot-data{background:#B45309}
.dot-sesso{background:#0E6B4A}.dot-luogo{background:#6D28D9}.dot-controllo{background:#BE123C}
/* L-6: textarea nascosta del fallback copia (prima: ta.style inline, vietato dal CSP) */
.copy-fallback{position:fixed;opacity:0;pointer-events:none}
/* L-6: allineamento card inverso (prima: card.style.textAlign inline) */
.result-card.sx{text-align:left}
/* L-6: centratura hint chip (prima: style="text-align:center" inline) */
.help-center{text-align:center}

/* omocodia varianti */
.varianti{margin:14px 0;text-align:left}
.varianti summary{cursor:pointer;font-weight:600;color:var(--verde);font-size:15px;min-height:44px;display:flex;align-items:center}
.varianti ol{font-family:var(--font-mono);font-size:14px;columns:2;column-gap:24px;margin:8px 0;padding-left:24px}
.varianti li{margin-bottom:4px;break-inside:avoid}

/* QR + stampa */
.qr-box{display:flex;gap:16px;align-items:center;justify-content:center;margin:14px 0;flex-wrap:wrap}
.qr-box canvas{image-rendering:pixelated;border:1px solid var(--bordo);border-radius:8px;background:#fff}
.qr-box p{font-size:13px;color:var(--inchiostro-2);max-width:220px;text-align:left;margin:0}

/* inverso / verifica */
.decode-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px;text-align:left}
.decode-table th,.decode-table td{border:1px solid var(--bordo);padding:9px 12px;vertical-align:top}
.decode-table th{background:var(--verde-tinta);width:38%;font-weight:600}
.note-list{text-align:left;font-size:14px;color:var(--inchiostro-2);margin:10px 0;padding-left:20px}
.verdetto{border-radius:var(--raggio);padding:18px;margin:16px 0;text-align:left;border:1.5px solid}
.verdetto h3{margin:0 0 8px;display:flex;align-items:center;gap:10px}
.verdetto-valido{background:#EFF8F2;border-color:#9FD4B4}
.verdetto-valido h3{color:var(--verde-scuro)}
.verdetto-omocodia{background:#FFFBEB;border-color:#EAC97A}
.verdetto-omocodia h3{color:#7A4E0B}
.verdetto-nonvalido{background:#FDF0EE;border-color:#E5A193}
.verdetto-nonvalido h3{color:var(--errore)}
.char-counter{font-size:13px;color:var(--inchiostro-2);font-family:var(--font-mono)}

/* ---------- sticky mini-result (mobile) ---------- */
.sticky-result{position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--bordo);box-shadow:0 -4px 18px rgba(26,34,48,.1);padding:10px 14px;display:none;align-items:center;gap:10px}
.sticky-result.show{display:flex}
.sticky-result .code{font-family:var(--font-mono);font-weight:700;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.sticky-result .btn{min-height:44px;padding:8px 16px;font-size:14px}
.sticky-result .close{background:none;border:0;font-size:20px;color:var(--inchiostro-2);cursor:pointer;padding:8px;min-width:44px;min-height:44px}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:76px;background:var(--inchiostro);color:#fff;padding:12px 20px;border-radius:999px;font-size:15px;font-weight:600;z-index:70;opacity:0;pointer-events:none;transition:opacity .2s}
.toast.show{opacity:1}

/* ---------- sezioni home ---------- */
.section{padding:34px 0}
.section h2{font-size:22px}
.cards{display:grid;gap:14px;grid-template-columns:1fr;margin-top:16px}
.card{background:#fff;border:1px solid var(--bordo);border-radius:var(--raggio);box-shadow:var(--ombra);padding:20px}
.card h3{margin-top:0}
.steps{list-style:none;counter-reset:passo;margin:18px 0 0;padding:0;display:grid;gap:12px;grid-template-columns:1fr}
.steps li{counter-increment:passo;background:#fff;border:1px solid var(--bordo);border-radius:var(--raggio);padding:16px 16px 16px 60px;position:relative}
.steps li::before{content:counter(passo);position:absolute;left:16px;top:16px;width:32px;height:32px;border-radius:50%;background:var(--verde);color:#fff;font-weight:700;display:grid;place-items:center}
.faq details{background:#fff;border:1px solid var(--bordo);border-radius:10px;margin-bottom:10px;padding:0}
.faq summary{cursor:pointer;font-weight:600;padding:14px 16px;min-height:48px;list-style:none;display:flex;justify-content:space-between;gap:10px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--verde);flex:none}
.faq details[open] summary::after{content:"–"}
.faq .answer{padding:0 16px 16px}

/* trust strip */
.trust-strip{display:grid;grid-template-columns:1fr;gap:10px;margin:18px 0}
.trust-item{display:flex;gap:10px;align-items:flex-start;background:#fff;border:1px solid var(--bordo);border-radius:10px;padding:12px 14px;font-size:14px}
.trust-item svg{flex:none;color:var(--verde);margin-top:2px}

/* ---------- CTA strumento (pagine contenuto) ---------- */
.tool-cta{background:linear-gradient(180deg,var(--risultato-da),#fff);border:1px solid var(--bordo);border-radius:var(--raggio);box-shadow:var(--ombra);padding:22px;margin:28px 0}
.tool-cta h2{margin-top:0}

/* ---------- footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--bordo);margin-top:44px;padding:30px 0 20px;font-size:14px;color:var(--inchiostro-2)}
.footer-grid{display:grid;gap:20px;grid-template-columns:1fr}
.site-footer nav ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.site-footer a{color:var(--inchiostro-2)}
.footer-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--bordo);font-size:13px}
.footer-note strong{color:var(--inchiostro)}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.mini-badge{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--bordo);border-radius:999px;padding:5px 12px;font-size:12.5px;color:var(--inchiostro-2)}
.mini-badge svg{color:var(--verde)}

/* ---------- responsive ---------- */
@media (min-width:640px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .trust-strip{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:2fr 1fr 1fr}
  .varianti ol{columns:3}
}
@media (min-width:1025px){
  .tool-layout{display:grid;grid-template-columns:minmax(0,620px) minmax(0,340px);gap:28px;align-items:start}
  .tool-side{position:sticky;top:84px;display:grid;gap:14px}
  .cards-3{grid-template-columns:repeat(3,1fr)}
}

/* ---------- reduced motion (§18/§20) ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* micro-interazioni ≤400ms, mai ritardanti (§20) */
.tab,.btn,.chip,.segmented span{transition-duration:.12s}
.err-msg{animation:slidein .18s ease-out}
@keyframes slidein{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- stampa (§15) ---------- */
@media print{
  .site-header,.site-footer,.tabs,.tool-panel form,.result-actions,.sticky-result,.toast,
  .tool-cta,.crumbs,.qr-box .qr-hint,.varianti,.chip-caption,.no-print{display:none !important}
  body{background:#fff}
  .result-card{box-shadow:none;border:1.5px solid #000}
  .cf-code{font-size:30px;color:#000}
  .print-only{display:block !important}
  .chips{display:none}
}
.print-only{display:none}
.print-table{width:100%;border-collapse:collapse;font-size:12px;margin-top:10px}
.print-table th,.print-table td{border:1px solid #999;padding:4px 8px;text-align:left}