/*  style.css — Nostra Collezione.
 *  Impianto da sala espositiva: fondo profondo e interfaccia silenziosa,
 *  perché il colore lo mettano i dipinti. Nessuna dipendenza esterna
 *  oltre ai font, che degradano su uno stack di sistema.
 */

/* ---------- token ---------- */

:root {
  --fondo:        #14120f;
  --fondo-2:      #1c1916;
  --fondo-3:      #232019;
  --bordo:        #332e26;
  --testo:        #f0ebe2;
  --testo-2:      #b5aa99;
  --testo-3:      #8a8072;
  --oro:          #c9a227;
  --oro-tenue:    #e0c56a;
  --mat:          #0e0c0a;   /* fondo dietro le opere: neutro, non nero */
  --ombra:        0 1px 2px rgba(0,0,0,.5), 0 8px 24px rgba(0,0,0,.35);
  --r:            2px;
  --serif:        "EB Garamond", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans:         "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max:          1360px;
  --transizione:  180ms cubic-bezier(.2,.6,.3,1);
}

:root[data-tema="chiaro"] {
  --fondo:     #f7f4ee;
  --fondo-2:   #fffdf8;
  --fondo-3:   #efeae0;
  --bordo:     #ddd5c6;
  --testo:     #201c16;
  --testo-2:   #5d5548;
  --testo-3:   #837a6b;
  --oro:       #8a6d10;
  --oro-tenue: #6d5608;
  --mat:       #e8e3d8;
  --ombra:     0 1px 2px rgba(60,50,30,.10), 0 8px 24px rgba(60,50,30,.10);
}

/* ---------- base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--fondo);
  color: var(--testo);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body.bloccato { overflow: hidden; }

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.15; margin: 0; }

a { color: var(--oro-tenue); }

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

.contenitore { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 3rem); }

.salta {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--oro); color: #14120f; padding: .75rem 1.25rem; font-weight: 600;
}
.salta:focus { left: .5rem; top: .5rem; }

/*  Intestazione presente per chi naviga con lo screen reader, invisibile
 *  a schermo. Diversa da .salta, che è un link e deve poter comparire.   */
.solo-lettori {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.occhiello {
  font-family: var(--sans);
  font-size: .72rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--oro); margin: 0 0 1rem;
}

/* ---------- testata ---------- */

.testata {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--fondo) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bordo);
}
@supports not (backdrop-filter: blur(1px)) { .testata { background: var(--fondo); } }

.testata__in { display: flex; align-items: center; gap: 1.5rem; min-height: 60px; }
.testata__marchio { font-family: var(--serif); font-size: 1.05rem; letter-spacing: .01em; margin-right: auto; }
.testata__nav { display: flex; gap: 1.5rem; }
.testata__nav a {
  color: var(--testo-2); text-decoration: none; font-size: .85rem;
  letter-spacing: .04em; transition: color var(--transizione);
}
.testata__nav a:hover { color: var(--testo); }

.btn-icona {
  background: none; border: 1px solid var(--bordo); color: var(--testo-2);
  border-radius: var(--r); cursor: pointer; font: inherit;
  font-size: .78rem; font-weight: 600; letter-spacing: .06em;
  min-width: 38px; height: 32px; padding-inline: .5rem;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color var(--transizione), border-color var(--transizione);
}
.btn-icona:hover { color: var(--testo); border-color: var(--testo-3); }
.btn-icona svg { width: 15px; height: 15px; }

.sole { display: none; } .luna { display: block; }
:root[data-tema="chiaro"] .sole { display: block; }
:root[data-tema="chiaro"] .luna { display: none; }

/* ---------- apertura ---------- */

/*  I bersagli dei link interni non devono finire sotto la testata sticky. */
#collezione, #catalogo, #contatti { scroll-margin-top: calc(var(--h-testata, 61px) + 1.5rem); }

.hero { padding: clamp(4rem, 12vh, 8rem) 0 clamp(3rem, 8vh, 5rem); border-bottom: 1px solid var(--bordo); }
.hero h1 { font-size: clamp(2.6rem, 7vw, 5rem); letter-spacing: -.015em; }
.hero__sotto { font-family: var(--serif); font-size: clamp(1.1rem, 2.4vw, 1.6rem); color: var(--testo-2); margin: 1rem 0 0; max-width: 34ch; }

.stat { display: flex; flex-wrap: wrap; gap: clamp(1.75rem, 5vw, 4rem); margin-top: clamp(2.5rem, 6vh, 4rem); }
.stat div { display: flex; flex-direction: column; }
.stat b { font-family: var(--serif); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 500; color: var(--oro-tenue); line-height: 1; }
.stat span { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--testo-3); margin-top: .6rem; }

.btn-primario {
  display: inline-block; margin-top: 2.5rem;
  background: var(--oro); color: #14120f;
  border: 0; border-radius: var(--r); cursor: pointer;
  font: inherit; font-weight: 600; font-size: .9rem; letter-spacing: .03em;
  padding: .8rem 1.75rem; text-decoration: none;
  transition: background var(--transizione), transform var(--transizione);
}
.btn-primario:hover { background: var(--oro-tenue); transform: translateY(-1px); }

/* ---------- introduzione ---------- */

.intro { padding: clamp(3.5rem, 9vh, 6rem) 0; border-bottom: 1px solid var(--bordo); }
.intro__griglia { display: grid; grid-template-columns: minmax(0,1fr); gap: 2rem; }
@media (min-width: 900px) { .intro__griglia { grid-template-columns: 22ch minmax(0,1fr); gap: 4rem; } }
.intro h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.intro p { color: var(--testo-2); max-width: 68ch; margin: 0 0 1.15rem; }
.intro p:last-child { margin-bottom: 0; }

/* ---------- barra dei filtri ---------- */

/*  Su schermo stretto i filtri NON sono appiccicati in alto: impilati
 *  occupavano 248px, cioè sei decimi di un viewport da telefono. Restano
 *  in cima al catalogo e scorrono via.                                   */
.strumenti {
  background: color-mix(in srgb, var(--fondo) 92%, transparent);
  border-bottom: 1px solid var(--bordo);
  padding: 1rem 0;
}
@supports not (backdrop-filter: blur(1px)) { .strumenti { background: var(--fondo); } }

.strumenti__in {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  align-items: end;
  gap: .75rem 1rem;
}

.campo { display: flex; flex-direction: column; gap: .35rem; min-width: 0; }
.campo > label { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--testo-3); }
.campo--cerca { grid-column: 1 / -1; }

input[type="text"], input[type="email"], select, textarea {
  background: var(--fondo-2); color: var(--testo);
  border: 1px solid var(--bordo); border-radius: var(--r);
  font: inherit; font-size: .88rem; padding: .5rem .7rem; width: 100%;
  transition: border-color var(--transizione);
}
input:hover, select:hover, textarea:hover { border-color: var(--testo-3); }
input::placeholder, textarea::placeholder { color: var(--testo-3); }
select { cursor: pointer; }

.btn-testo {
  text-align: left; align-self: center;
  background: none; border: 0; color: var(--testo-3); cursor: pointer;
  font: inherit; font-size: .8rem; padding: .5rem 0; text-decoration: underline;
  text-underline-offset: 3px; transition: color var(--transizione);
}
.btn-testo:hover { color: var(--testo); }

.conteggio {
  font-family: var(--serif); font-size: .95rem; color: var(--testo-2);
  align-self: center; white-space: nowrap;
}

/*  Da 900px in su la barra sta su una riga sola: torna appiccicata sotto
 *  la testata, dove serve davvero mentre si scorre un catalogo lungo.    */
@media (min-width: 900px) {
  .strumenti {
    position: sticky; top: var(--h-testata, 61px); z-index: 30;
    backdrop-filter: blur(12px);
  }
  .strumenti__in { display: flex; flex-wrap: wrap; align-items: flex-end; gap: .9rem 1.25rem; }
  .campo { flex: 0 1 10rem; }
  .campo--cerca { flex: 1 1 15rem; }
  .conteggio { margin-left: auto; align-self: flex-end; padding-bottom: .5rem; }
  .btn-testo { align-self: flex-end; }
}

/* ---------- griglia delle opere ---------- */

.catalogo { padding: clamp(2rem, 5vh, 3.5rem) 0 clamp(4rem, 10vh, 6rem); }

/*  Masonry: le opere hanno proporzioni molto diverse (62 verticali,
 *  52 orizzontali, 14 quadrate) e non vanno mai ritagliate. Le colonne
 *  sono riempite dal JS in ordine di lettura — `columns` CSS le
 *  riempirebbe una alla volta, mettendo in cima le schede 1, 28, 55 e 82. */
.griglia { display: flex; align-items: flex-start; gap: 1.75rem; }
.griglia__col { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; gap: 1.75rem; }

.card { break-inside: avoid; }

.card__btn {
  display: block; width: 100%; text-align: left;
  background: none; border: 0; padding: 0; cursor: pointer; color: inherit; font: inherit;
}

.card__figura {
  display: block; position: relative; background: var(--mat);
  border: 1px solid var(--bordo); border-radius: var(--r);
  overflow: hidden; box-shadow: var(--ombra);
  transition: border-color var(--transizione), transform var(--transizione);
}
.card__btn:hover .card__figura { border-color: var(--oro); transform: translateY(-2px); }
.card__figura img { width: 100%; }

.card__badge {
  position: absolute; right: .5rem; bottom: .5rem;
  background: rgba(10,8,6,.82); color: #f0ebe2;
  font-size: .66rem; letter-spacing: .05em;
  padding: .2rem .5rem; border-radius: var(--r);
  backdrop-filter: blur(4px);
}

.card__testo { display: block; padding-top: .8rem; }
.card__n { display: block; font-size: .66rem; letter-spacing: .14em; text-transform: uppercase; color: var(--oro); }
.card__autore { display: block; font-size: .8rem; color: var(--testo-2); margin-top: .3rem; }
.card__titolo { display: block; font-family: var(--serif); font-size: 1.12rem; line-height: 1.25; margin-top: .15rem; }
.card__meta { display: block; font-size: .74rem; color: var(--testo-3); margin-top: .35rem; }

.vuoto { text-align: center; padding: 5rem 1rem; }
.vuoto p { color: var(--testo-3); margin: .5rem 0 0; }
.vuoto strong { font-family: var(--serif); font-size: 1.3rem; font-weight: 500; }

/* ---------- scheda a tutta pagina ---------- */

.lb { position: fixed; inset: 0; z-index: 60; display: flex; }
.lb[hidden] { display: none; }
.lb__sfondo { position: absolute; inset: 0; background: rgba(6,5,4,.88); backdrop-filter: blur(6px); border: 0; cursor: zoom-out; }

.lb__pannello {
  position: relative; margin: auto; width: min(1180px, 100% - 1.5rem); max-height: calc(100dvh - 1.5rem);
  background: var(--fondo-2); border: 1px solid var(--bordo); border-radius: var(--r);
  box-shadow: 0 30px 80px rgba(0,0,0,.6);
  display: grid; grid-template-columns: minmax(0,1fr); overflow: auto;
}
@media (min-width: 880px) { .lb__pannello { grid-template-columns: minmax(0,1.35fr) minmax(340px,.85fr); overflow: hidden; } }

.lb__vista { background: var(--mat); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 1.5rem; gap: 1rem; min-height: 240px; }
/*  L'immagine non supera mai la propria risoluzione nativa: le foto della
 *  perizia sono piccole e ingrandirle le sgranerebbe.                      */
.lb__figura img { max-height: min(66dvh, 560px); width: auto; object-fit: contain; box-shadow: 0 6px 30px rgba(0,0,0,.45); }

.lb__strip { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; }
.strip__b { background: none; border: 1px solid var(--bordo); border-radius: var(--r); padding: 0; cursor: pointer; overflow: hidden; line-height: 0; transition: border-color var(--transizione); }
.strip__b img { width: 54px; height: 54px; object-fit: cover; }
.strip__b:hover { border-color: var(--testo-3); }
.strip__b.is-attiva { border-color: var(--oro); }

.lb__dati { padding: clamp(1.5rem, 3vw, 2.25rem); overflow-y: auto; display: flex; flex-direction: column; }
.lb__n { font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--oro); }
.lb__titolo { font-size: clamp(1.5rem, 3vw, 2rem); margin: .5rem 0 1.25rem; }

.lb__tag { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.5rem; }
.tag { font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--testo-2); border: 1px solid var(--bordo); border-radius: var(--r); padding: .22rem .55rem; }

.lb__lista { margin: 0; display: flex; flex-direction: column; gap: 1rem; }
.dato dt { font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--testo-3); }
.dato dd { margin: .25rem 0 0; font-family: var(--serif); font-size: 1.02rem; line-height: 1.45; color: var(--testo); }

.lb__pieno { margin-top: auto; padding-top: 1.75rem; }
.lb__risoluzione { font-size: .7rem; color: var(--testo-3); margin: 0 0 1rem; }
.lb__nav { display: flex; align-items: center; gap: .75rem; border-top: 1px solid var(--bordo); padding-top: 1rem; }
.lb__pos { font-size: .78rem; color: var(--testo-3); font-variant-numeric: tabular-nums; }

.lb__chiudi { position: absolute; top: .6rem; right: .6rem; z-index: 2; background: rgba(10,8,6,.7); }
:root[data-tema="chiaro"] .lb__chiudi { background: rgba(255,253,248,.85); }

/* ---------- contatti ---------- */

.contatti { padding: clamp(4rem, 10vh, 6rem) 0; border-top: 1px solid var(--bordo); background: var(--fondo-2); }
.contatti__griglia { display: grid; grid-template-columns: minmax(0,1fr); gap: 2.5rem; }
@media (min-width: 900px) { .contatti__griglia { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 4rem; } }
.contatti h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); }
.contatti__intro { color: var(--testo-2); margin: 1rem 0 1.5rem; max-width: 46ch; }

.contatti__dati { margin: 0 0 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.contatti__dati a { text-decoration: none; border-bottom: 1px solid currentColor; }
.contatti__dati a:hover { color: var(--oro); }

.form { display: flex; flex-direction: column; gap: 1rem; }
.form textarea { resize: vertical; min-height: 8rem; }
.form__nota { font-size: .74rem; color: var(--testo-3); margin: 0; }
.errore { color: #e8836b; font-size: .82rem; margin: 0; }
:root[data-tema="chiaro"] .errore { color: #b03d1f; }

.avviso { border: 1px dashed var(--bordo); border-radius: var(--r); padding: 1.25rem; color: var(--testo-2); font-size: .88rem; }

/* ---------- piede ---------- */

.piede { border-top: 1px solid var(--bordo); padding: 2.5rem 0; font-size: .78rem; color: var(--testo-3); }
.piede p { margin: 0 0 .75rem; max-width: 72ch; }
.piede__riga { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between; margin-top: 1.5rem; }
.piede a { color: var(--testo-2); }

/* ---------- movimento ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .card__btn:hover .card__figura, .btn-primario:hover { transform: none; }
}

/* ---------- stampa ---------- */

@media print {
  .testata, .strumenti, .hero .btn-primario, .contatti, .lb, .salta { display: none !important; }
  body { background: #fff; color: #000; }
  .griglia { display: block; }
  .griglia__col { display: block; }
  .card { break-inside: avoid; margin-bottom: 1rem; }
}