/*
 * temario.css — lo stile delle pagine per argomento.
 *
 * Sta in un file suo e non dentro ogni pagina: sono quattro pagine generate, e un CSS
 * copiato quattro volte e' un CSS che dalla seconda correzione in poi diverge. Qui si
 * corregge una volta, e siccome il file si scarica una sola volta per tutte e quattro,
 * chi ne apre due paga il peso una volta sola.
 * I nomi e i valori sono quelli della home: e' lo stesso sito, non deve sembrare un
 * pezzo attaccato dopo.
 */
:root{
  --titolo:"Instrument Serif",Georgia,"Times New Roman",serif;
  --testo:"Instrument Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --tinta:#0f172a; --tenue:#64748b; --prosa:#475569; --linea:#e2e8f0;
  --fondo:#ffffff; --pannello:#f8fafc; --accento:#0d9488; --accento-scuro:#0f766e;
  --bene:#15803d; --bene-sfondo:#f0fdf4; --male:#b91c1c; --male-sfondo:#fef2f2;
  --notte:#0b1729; --notte-2:#123141; --vivo:#14b8a6;
  --su-notte:#eaf4f4; --su-notte-tenue:#a9c4c9;
  --uscita:cubic-bezier(.16,1,.3,1);
}
@media (prefers-color-scheme: dark){
  :root{ --tinta:#e2e8f0; --tenue:#94a3b8; --prosa:#cbd5e1; --linea:#1e293b;
         --fondo:#0b1220; --pannello:#111a2b; --accento:#2dd4bf; --accento-scuro:#5eead4;
         --bene:#4ade80; --bene-sfondo:#052e16; --male:#f87171; --male-sfondo:#3f1212;
         --notte:#08111f; --notte-2:#0f2836; }
}

*{box-sizing:border-box}
html{scrollbar-color:var(--linea) transparent}
body{margin:0;background:var(--fondo);color:var(--tinta);
     font:16px/1.65 var(--testo);
     -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--vivo);color:#04231f}
:focus-visible{outline:2px solid var(--vivo);outline-offset:3px;border-radius:6px}
a{color:var(--accento-scuro);text-underline-offset:3px;text-decoration-thickness:1px}
@media (prefers-color-scheme: dark){ a{color:var(--accento)} }

.avvolge{max-width:1080px;margin:0 auto;padding:0 22px}

/* ---- la testata, scura come la home ---- */
.testa-scura{background:linear-gradient(150deg,var(--notte) 0%,var(--notte-2) 100%);
             color:var(--su-notte);position:relative;overflow:hidden;
             padding:0 0 clamp(38px,6vw,58px)}
.testa-scura::after{content:'';position:absolute;right:-160px;top:-220px;
                    width:600px;height:600px;border-radius:50%;pointer-events:none;
                    background:radial-gradient(circle,rgba(20,184,166,.24),transparent 68%)}
.testa-scura > *{position:relative;z-index:1}
.riga-alta{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0 0}
.marchio{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;
         letter-spacing:-.025em;color:inherit;text-decoration:none}
.marchio svg{display:block;flex:none}
.riga-alta nav{display:flex;gap:20px}
.riga-alta nav a{font-size:14.5px;font-weight:500;color:var(--su-notte-tenue);
                 text-decoration:none;white-space:nowrap}
.riga-alta nav a:hover{color:#fff}

/* Le briciole: dicono a chi arriva da Google dov'e' finito, e a Google come e' fatto
   il sito. Senza, una pagina di argomento sembra un foglio volante. */
.briciole{margin:clamp(30px,5vw,44px) 0 14px;font-size:13.5px;color:var(--su-notte-tenue)}
.briciole a{color:var(--su-notte-tenue);text-decoration:none}
.briciole a:hover{color:#fff;text-decoration:underline}
.briciole span{margin:0 8px;opacity:.5}

h1{font-family:var(--titolo);font-weight:400;
   font-size:clamp(34px,5.6vw,54px);line-height:1.05;letter-spacing:-.02em;
   color:#fff;margin:0 0 16px;max-width:20ch;text-wrap:balance}
.sotto-titolo{font-size:clamp(16.5px,2.2vw,19px);line-height:1.55;
              color:var(--su-notte-tenue);max-width:58ch;margin:0}
.sotto-titolo strong{color:#fff;font-weight:600}

.cifre{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0 0}
.cifra{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.11);
       border-radius:12px;padding:12px 16px;display:flex;align-items:baseline;gap:9px}
.cifra b{font-size:21px;font-weight:700;color:#fff;letter-spacing:-.02em;
         font-variant-numeric:tabular-nums}
.cifra span{font-size:13px;color:var(--su-notte-tenue)}

/* ---- il corpo ---- */
section{padding:clamp(46px,7vw,72px) 0}
section.fascia{background:var(--pannello);
               border-top:1px solid var(--linea);border-bottom:1px solid var(--linea)}
section + section:not(.fascia){border-top:1px solid var(--linea)}
section.fascia + section{border-top:0}
.soprattitolo{display:block;font-size:12px;font-weight:700;letter-spacing:.14em;
              text-transform:uppercase;color:var(--accento-scuro);margin:0 0 12px}
@media (prefers-color-scheme: dark){ .soprattitolo{color:var(--accento)} }
h2{font-family:var(--titolo);font-weight:400;
   font-size:clamp(26px,4vw,36px);line-height:1.15;letter-spacing:-.015em;
   margin:0 0 14px;max-width:27ch;text-wrap:balance}
h3{font-size:18px;line-height:1.3;letter-spacing:-.02em;margin:0 0 6px;font-weight:700}
.guida{color:var(--prosa);max-width:64ch;margin:0;font-size:16.5px}
.tenue{color:var(--tenue);font-size:14px}

/* i temi ufficiali, uno per riga */
.temi{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-direction:column;gap:0;
      max-width:76ch}
.temi li{display:flex;gap:16px;align-items:baseline;padding:14px 0;
         border-bottom:1px solid var(--linea)}
.temi li:last-child{border-bottom:0}
.temi .num{flex:none;font-variant-numeric:tabular-nums;font-weight:700;font-size:14px;
           color:var(--accento-scuro);min-width:34px}
@media (prefers-color-scheme: dark){ .temi .num{color:var(--accento)} }
.temi .cosa{font-size:16px;line-height:1.45}

/* gli errori tipici: prosa, non scatolette */
.errori{margin:26px 0 0;display:flex;flex-direction:column;gap:24px;max-width:68ch}
.errore p{margin:0;color:var(--prosa);font-size:15.5px;line-height:1.62}

/* la domanda giocabile, uguale a quella della home */
.prova{background:var(--fondo);border:1px solid var(--linea);border-radius:18px;
       padding:clamp(20px,3.4vw,28px);margin:24px 0 0;max-width:860px}
.intestazione{display:flex;justify-content:space-between;align-items:baseline;
              gap:14px;flex-wrap:wrap;margin:0 0 14px}
.etichetta{font-size:12px;color:var(--tenue);border:1px solid var(--linea);
           border-radius:999px;padding:4px 12px;background:var(--pannello)}
.enunciado{font-size:clamp(16.5px,2.2vw,18.5px);line-height:1.5;font-weight:500;margin:0 0 18px}
.opciones{display:flex;flex-direction:column;gap:10px}
.opcion{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;
        font:inherit;padding:13px 15px;line-height:1.45;cursor:pointer;
        border:1px solid var(--linea);border-radius:10px;
        background:var(--fondo);color:var(--tinta);
        transition:border-color .15s,background .15s,transform .15s var(--uscita)}
.opcion:hover:not(.risolta){border-color:var(--accento);transform:translateX(2px)}
.opcion.risolta{cursor:default}
.opcion .letra{flex:none;width:24px;height:24px;border-radius:50%;
               border:1px solid var(--linea);display:grid;place-items:center;
               font-size:13px;font-weight:700;margin-top:1px}
.opcion.correcta{border-color:var(--bene);background:var(--bene-sfondo)}
.opcion.correcta .letra{background:var(--bene);border-color:var(--bene);color:#fff}
.opcion.fallada{border-color:var(--male);background:var(--male-sfondo)}
.opcion.fallada .letra{background:var(--male);border-color:var(--male);color:#fff}
.opcion.apagada{opacity:.55}
.explicacion{background:var(--pannello);border:1px solid var(--linea);
             padding:17px 19px;border-radius:12px;margin:15px 0 0;
             font-size:15.5px;line-height:1.6}
.explicacion .titolo{display:block;font-weight:700;font-size:12.5px;letter-spacing:.06em;
                     text-transform:uppercase;color:var(--accento-scuro);margin:0 0 9px}
@media (prefers-color-scheme: dark){ .explicacion .titolo{color:var(--accento)} }
.explicacion .fuente{display:block;margin-top:10px;color:var(--tenue);font-size:13px}
.apre{animation:apre .34s var(--uscita) both}
@keyframes apre{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* i vicini: gli altri domini. Servono a chi legge e a Google, che cosi' trova le
   altre pagine senza passare dalla mappa del sito. */
.vicini{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;
        margin:26px 0 0}
.vicino{display:block;text-decoration:none;color:inherit;
        background:var(--fondo);border:1px solid var(--linea);border-radius:14px;
        padding:17px 18px;transition:border-color .15s,transform .15s var(--uscita)}
.vicino:hover{border-color:var(--accento);transform:translateY(-2px)}
.vicino b{display:block;font-size:15.5px;line-height:1.3;letter-spacing:-.01em;margin:0 0 5px}
.vicino span{display:block;font-size:13px;color:var(--tenue);font-variant-numeric:tabular-nums}

/* la chiusura scura, come sulla home */
.chiusura{background:linear-gradient(150deg,var(--notte) 0%,var(--notte-2) 100%);
          color:var(--su-notte);border:1px solid rgba(255,255,255,.10);
          border-radius:20px;padding:clamp(30px,5vw,44px);
          margin:0 0 clamp(48px,7vw,76px);position:relative;overflow:hidden;text-align:center}
@media (prefers-color-scheme: dark){
  .chiusura{background:linear-gradient(150deg,#102434 0%,#16394a 100%);
            border-color:rgba(255,255,255,.13)}
}
.chiusura::after{content:'';position:absolute;left:50%;bottom:-260px;transform:translateX(-50%);
                 width:520px;height:420px;border-radius:50%;pointer-events:none;
                 background:radial-gradient(circle,rgba(20,184,166,.24),transparent 70%)}
.chiusura > *{position:relative;z-index:1}
.chiusura h2{color:#fff;margin:0 0 12px;max-width:26ch;margin-inline:auto}
.chiusura p{color:var(--su-notte-tenue);max-width:52ch;margin:0 auto}
.chiusura strong{color:#fff;font-weight:600}
.azione{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center;margin:26px 0 0}
.bottone{display:inline-flex;align-items:center;gap:9px;background:var(--vivo);color:#04231f;
         text-decoration:none;font-weight:700;font-size:16px;letter-spacing:-.01em;
         padding:14px 24px;border-radius:12px;
         box-shadow:0 10px 26px -12px rgba(20,184,166,.75);
         transition:transform .2s var(--uscita),box-shadow .2s var(--uscita),background .2s}
.bottone:hover{background:#2dd4bf;transform:translateY(-2px)}
.bottone svg{flex:none;transition:transform .2s var(--uscita)}
.bottone:hover svg{transform:translateX(3px)}
.bottone b{font-weight:800;font-variant-numeric:tabular-nums}
.bottone.calmo{background:transparent;color:#fff;box-shadow:none;
               border:1px solid rgba(255,255,255,.28)}
.bottone.calmo:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.5)}

footer{border-top:1px solid var(--linea);padding:38px 0 54px;background:var(--pannello);
       color:var(--tenue);font-size:13.5px;line-height:1.6}
footer p{margin:0 0 10px;max-width:74ch}
footer p:last-child{margin:0}
footer b{color:var(--tinta);font-weight:600}
.piede-alto{display:flex;gap:30px;flex-wrap:wrap;justify-content:space-between;
            align-items:flex-start;padding:0 0 24px;margin:0 0 22px;
            border-bottom:1px solid var(--linea)}
.piede-link{display:flex;gap:8px 22px;flex-wrap:wrap;margin:0}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
}