/* ===========================================================
   OSTALIA — Pagina Tutorial
   Usa le variabili e i componenti di ../styles.css (nav, btn,
   container, cta-band, footer): qui c'è solo quello che è nuovo.
   =========================================================== */

/* voce attiva nel menu */
.nav-links a.attivo{color:var(--deep);font-weight:700}

/* ---------- banner ---------- */
.tut-hero{
  position:relative;overflow:hidden;
  padding:140px 0 64px;
  background:var(--grad-warm);
  color:#fff;
}
.tut-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;
  width:520px;height:520px;border-radius:50%;
  background:rgba(255,255,255,.18);filter:blur(10px);
}
.tut-hero .container{position:relative;z-index:1}
.tut-hero h1{color:#fff;font-size:clamp(2.2rem,4.6vw,3.4rem);margin-bottom:16px}
.tut-hero .lead{color:rgba(255,255,255,.94);max-width:680px}
.tut-hero .pill{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.35);color:#fff;box-shadow:none;backdrop-filter:blur(6px)}
.tut-hero .pill .spark{background:#fff}
.tut-hero-stat{
  display:flex;flex-wrap:wrap;gap:12px 34px;margin-top:26px;
  font-size:.92rem;color:rgba(255,255,255,.9);
}
.tut-hero-stat b{font-family:var(--display);font-size:1.25rem;color:#fff;margin-right:6px}

/* ---------- barra degli strumenti ---------- */
.tut-section{padding:54px 0 76px}
/* Due righe volute: titolo e ricerca sopra, le etichette sotto a tutta
   larghezza. Con sette argomenti su una riga sola la ricerca andava a capo
   da sola, e il risultato sembrava sbagliato invece che voluto. */
.tut-toolbar{
  display:grid;grid-template-columns:1fr auto;align-items:center;
  gap:16px;margin-bottom:30px;
}
.tut-h2{font-size:1.6rem;grid-row:1;grid-column:1}
.tut-filtri{grid-row:2;grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px}
.tut-filtri button{
  font-family:var(--display);font-weight:600;font-size:.88rem;
  padding:.5rem 1.05rem;border-radius:999px;cursor:pointer;
  background:#fff;border:1px solid var(--line);color:var(--slate-2);
  transition:background .2s,color .2s,border-color .2s,transform .2s;
}
.tut-filtri button:hover{transform:translateY(-1px);border-color:var(--terra);color:var(--deep)}
.tut-filtri button.attivo{background:var(--grad-warm);border-color:transparent;color:#fff;box-shadow:0 8px 18px rgba(201,83,59,.26)}
.tut-cerca{
  grid-row:1;grid-column:2;justify-self:end;
  display:flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:.5rem 1rem;min-width:260px;color:var(--muted);
}
.tut-cerca:focus-within{border-color:var(--terra);box-shadow:0 0 0 3px rgba(226,125,90,.16)}
.tut-cerca svg{width:18px;height:18px;flex-shrink:0}
.tut-cerca input{border:0;outline:0;font:inherit;font-size:.92rem;color:var(--ink);background:transparent;width:100%}

/* ---------- griglia delle schede ---------- */
.tut-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media (max-width:1080px){.tut-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:860px){.tut-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.tut-grid{grid-template-columns:1fr}}

.tut-card{
  display:flex;flex-direction:column;text-align:left;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;padding:0;cursor:pointer;font:inherit;color:inherit;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.tut-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.tut-card:focus-visible{outline:3px solid var(--terra);outline-offset:2px}

.tut-cover{position:relative;aspect-ratio:16/9;background:#f4eee4;overflow:hidden}
.tut-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.tut-card:hover .tut-cover img{transform:scale(1.04)}
.tut-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(35,48,58,0) 55%,rgba(35,48,58,.45) 100%);
}
.tut-play{
  position:absolute;inset:0;margin:auto;z-index:2;
  width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(255,255,255,.92);color:var(--deep);
  box-shadow:0 10px 26px rgba(45,59,67,.28);
  transform:scale(.88);opacity:.92;transition:transform .25s ease,opacity .25s ease;
}
.tut-play svg{width:24px;height:24px;margin-left:3px}
.tut-card:hover .tut-play{transform:scale(1);opacity:1}
.tut-durata{
  position:absolute;right:10px;bottom:10px;z-index:2;
  background:rgba(35,48,58,.82);color:#fff;
  font-size:.74rem;font-weight:700;letter-spacing:.02em;
  padding:.18rem .5rem;border-radius:7px;
}

.tut-body{padding:16px 17px 4px;flex:1}
.tut-body h3{font-size:1.04rem;line-height:1.25;margin-bottom:10px}
.tut-chip{
  display:inline-block;font-size:.74rem;font-weight:700;
  padding:.22rem .62rem;border-radius:999px;
  color:var(--deep);background:rgba(246,184,92,.16);border:1px solid rgba(226,125,90,.34);
}
.tut-body p{font-size:.88rem;line-height:1.5;margin-top:11px;color:var(--muted)}
.tut-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:16px;padding:11px 17px;border-top:1px solid var(--line);
  font-size:.8rem;color:var(--muted);font-weight:600;
}
.tut-foot span{display:inline-flex;align-items:center;gap:6px}
.tut-foot svg{width:15px;height:15px}

/* schede dei video non ancora girati */
.tut-card.inarrivo{cursor:default;background:#fdfaf5}
.tut-card.inarrivo:hover{transform:none;box-shadow:none;border-color:var(--line)}
.tut-card.inarrivo .tut-cover{background:var(--grad-soft);display:grid;place-items:center}
.tut-card.inarrivo .tut-cover::after{display:none}
.tut-card.inarrivo .tut-cover svg{width:46px;height:46px;color:var(--terra);opacity:.6}
.tut-card.inarrivo h3{color:var(--slate-2)}
.tut-attesa{
  position:absolute;left:10px;top:10px;z-index:2;
  background:#fff;border:1px solid var(--line);color:var(--deep);
  font-size:.72rem;font-weight:700;padding:.2rem .6rem;border-radius:999px;
}

.tut-vuoto{text-align:center;color:var(--muted);margin-top:34px}
.tut-vuoto button{background:none;border:0;color:var(--deep);font:inherit;font-weight:700;cursor:pointer;text-decoration:underline}

.tut-noscript{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.tut-noscript ul{margin:12px 0 0 18px}
.tut-noscript a{color:var(--deep);font-weight:600;text-decoration:underline}

/* ---------- lettore ---------- */
.tut-modal{position:fixed;inset:0;z-index:120;display:grid;place-items:center;padding:24px}
.tut-modal[hidden]{display:none}
.tut-modal-sfondo{position:absolute;inset:0;background:rgba(35,48,58,.74);backdrop-filter:blur(4px)}
.tut-modal-box{
  position:relative;z-index:1;width:min(1180px,100%);max-height:88vh;
  display:grid;grid-template-columns:1.78fr .82fr;
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.tut-chiudi{
  position:absolute;right:12px;top:10px;z-index:3;
  width:36px;height:36px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(255,255,255,.92);color:var(--slate);
  font-size:1.5rem;line-height:1;display:grid;place-items:center;
  box-shadow:var(--shadow-sm);
}
.tut-chiudi:hover{background:#fff;color:var(--deep)}
.tut-player{background:#000;display:flex;align-items:center}
.tut-player video{width:100%;max-height:90vh;display:block;aspect-ratio:16/9;background:#000}
.tut-modal-info{padding:24px 24px 26px;overflow-y:auto;display:flex;flex-direction:column;min-height:0}
/* Niente compressione: in colonna flex i pezzi si schiacciavano a vicenda e il
   pulsante finiva sopra l'elenco dei capitoli. */
.tut-modal-info > *{flex-shrink:0}
.tut-modal-info .tut-chip{align-self:flex-start;margin-right:42px}
.tut-modal-info h3{font-size:1.3rem;margin:12px 0 8px;padding-right:36px}
.tut-modal-info > p{font-size:.92rem;color:var(--slate-2)}
.tut-modal-info h4{
  display:flex;align-items:center;gap:8px;
  font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  margin:22px 0 10px;
}
/* I capitoli scorrono dentro la colonna: senza tetto, un video da diciassette
   capitoli allungava la finestra e lasciava mezzo schermo di nero intorno al
   filmato, che è alto la metà. */
.tut-capitoli{list-style:none;display:flex;flex-direction:column;gap:2px;margin:0;padding:0 4px 0 0;overflow-y:auto;max-height:34vh;min-height:0}
.tut-capitoli button{
  width:100%;display:flex;gap:11px;align-items:baseline;
  background:none;border:0;cursor:pointer;font:inherit;text-align:left;
  padding:.44rem .6rem;border-radius:10px;color:var(--slate-2);font-size:.9rem;
  transition:background .15s,color .15s;
}
.tut-capitoli button:hover{background:#faf5ec;color:var(--deep)}
.tut-capitoli button b{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.82rem;font-weight:600;color:var(--terra);flex-shrink:0;min-width:34px;
}
.tut-capitoli li.attivo button{background:var(--grad-soft);color:var(--deep);font-weight:600}
.tut-capitoli li.attivo button b{color:var(--deep)}
.tut-modal-cta{margin-top:20px;justify-content:center}

/* Sul telefono il lettore è un foglio a tutto schermo: il filmato in alto,
   fermo, e sotto la scheda che scorre. Le righe sono dichiarate perché la
   seconda possa scorrere davvero invece di essere tagliata. */
@media (max-width:900px){
  .tut-modal{padding:0}
  .tut-modal-box{
    grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr);
    height:100vh;max-height:100vh;border-radius:0;
  }
  .tut-player video{max-height:40vh}
  .tut-modal-info{overflow-y:auto}
  .tut-capitoli{max-height:none;overflow:visible}
}
@media (max-width:680px){
  .tut-hero{padding:120px 0 48px}
  .tut-toolbar{grid-template-columns:1fr;gap:12px}
  .tut-h2,.tut-filtri,.tut-cerca{grid-row:auto;grid-column:1}
  .tut-cerca{width:100%;justify-self:stretch}
}