/* CODIS - Concetto Di Salvo Studio™: foglio di stile unico del sito.
   Linguaggio da studio di architettura: carta, inchiostro, filetti sottili, griglia a 12 colonne,
   etichette maiuscole spaziate, curve di livello come unico ornamento. */
:root {
  --carta: #ffffff;
  --inchiostro: #121211;
  --grigio: #77756f;
  --filetto: #d9d7d2;
  --tenue: #f2f1ee;
  --lava: #a3361b;          /* unico colore, usato con parsimonia */
  --curve: #b9b4a8;
  --max: 1320px;
  --gutter: clamp(16px, 4vw, 48px);
  --sans: "Helvetica Neue", Helvetica, "Inter", "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --carta: #121211; --inchiostro: #ecebe6; --grigio: #9a978f; --filetto: #34332f; --tenue: #1c1c1a; --lava: #e07a55; --curve: #3d3b36;
  }
}
:root[data-theme="dark"] {
  --carta: #121211; --inchiostro: #ecebe6; --grigio: #9a978f; --filetto: #34332f; --tenue: #1c1c1a; --lava: #e07a55; --curve: #3d3b36;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--carta); color: var(--inchiostro);
  font: 400 17px/1.6 var(--sans); letter-spacing: .005em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
p a, .testo a { border-bottom: 1px solid var(--filetto); transition: border-color .2s; }
p a:hover, .testo a:hover { border-color: var(--inchiostro); }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* etichetta tecnica: maiuscolo spaziato, come nei cartigli */
.etichetta, nav a, .indice .num, .indice .tipo, .cartiglio, footer.sito .piccolo {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .16em; font-weight: 500;
}

/* --- intestazione --- */
header.sito {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--carta) 88%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--filetto);
}
header.sito .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 32px; min-height: 68px; }
.marchio { display: flex; align-items: baseline; gap: 14px; }
.marchio b { font-weight: 700; font-size: 1.15rem; letter-spacing: .42em; }
.marchio span { font-size: .72rem; color: var(--grigio); letter-spacing: .08em; }
nav { display: flex; flex-wrap: wrap; gap: 6px 26px; }
nav a { color: var(--grigio); padding: 4px 0; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
nav a:hover { color: var(--inchiostro); }
nav a[aria-current="page"] { color: var(--inchiostro); border-color: var(--inchiostro); }

/* --- apertura (home) --- */
.apertura { position: relative; border-bottom: 1px solid var(--filetto); overflow: hidden; }
.apertura::before {
  content: ""; position: absolute; inset: 0; background: var(--curve);
  -webkit-mask: url(/img/curve.svg) center / cover no-repeat; mask: url(/img/curve.svg) center / cover no-repeat;
  opacity: .9; pointer-events: none;
}
.apertura .wrap { position: relative; min-height: min(86vh, 860px); display: grid; align-content: end; padding-top: 96px; padding-bottom: 56px; }
.apertura h1 {
  font: 300 clamp(2.6rem, 7.4vw, 6.6rem)/1 var(--sans); letter-spacing: -.035em; margin: 0; max-width: 13ch;
}
.apertura h1 em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
.apertura .sotto { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--inchiostro); }
.apertura .sotto p { margin: 0; color: var(--grigio); max-width: 34em; }
.coordinate { font-variant-numeric: tabular-nums; }

/* --- intestazione di pagina interna --- */
.testata { border-bottom: 1px solid var(--filetto); }
.testata .wrap { padding-top: clamp(56px, 10vw, 120px); padding-bottom: 40px; display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
.testata .etichetta { grid-column: 1 / span 3; color: var(--grigio); padding-top: .9em; }
.testata h1 { grid-column: 4 / -1; font: 300 clamp(2.2rem, 5.4vw, 4.6rem)/1.02 var(--sans); letter-spacing: -.03em; margin: 0; }
.testata .lead { grid-column: 4 / span 7; margin: 24px 0 0; color: var(--grigio); font-size: 1.12rem; }

/* --- sezioni a due colonne: etichetta a sinistra, contenuto a destra --- */
.sezione { border-bottom: 1px solid var(--filetto); }
.sezione .wrap { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; padding-top: 56px; padding-bottom: 64px; }
.sezione .etichetta { grid-column: 1 / span 3; color: var(--grigio); }
.sezione .testo { grid-column: 4 / span 7; }
.sezione .testo.largo { grid-column: 4 / -1; }
.sezione h2 { font: 300 clamp(1.6rem, 3vw, 2.3rem)/1.15 var(--sans); letter-spacing: -.02em; margin: 0 0 18px; }
.sezione h3 { font-size: 1.05rem; font-weight: 600; margin: 0 0 6px; }
.testo p { margin: 0 0 1em; }

/* --- indice numerato (servizi, progetti, sezioni della home) --- */
.indice { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--inchiostro); }
.indice li { border-bottom: 1px solid var(--filetto); }
.indice a, .indice .riga {
  display: grid; grid-template-columns: 3.5rem 1fr auto; gap: 8px 20px; align-items: baseline; padding: 22px 0;
}
.indice .num { color: var(--grigio); }
.indice .titolo { font: 300 clamp(1.3rem, 2.6vw, 1.9rem)/1.2 var(--sans); letter-spacing: -.015em; }
.indice .desc { grid-column: 2 / 3; color: var(--grigio); font-size: .95rem; max-width: 46em; }
.indice .tipo { color: var(--grigio); white-space: nowrap; }
.indice a .titolo { transition: transform .35s cubic-bezier(.2,.7,.2,1); }
.indice a:hover .titolo { transform: translateX(10px); }
.indice a::after { content: "\2192"; grid-column: 3; grid-row: 1; justify-self: end; color: var(--grigio); transition: color .2s, transform .35s; }
.indice a:hover::after { color: var(--lava); transform: translateX(4px); }
.indice a .tipo { display: none; }

/* --- tavola: riquadro con curve di livello, cartiglio e didascalia --- */
.tavola { position: relative; aspect-ratio: 16 / 9; border: 1px solid var(--inchiostro); background: var(--tenue); overflow: hidden; }
.tavola::before {
  content: ""; position: absolute; inset: 0; background: var(--curve);
  -webkit-mask: url(/img/curve.svg) 70% 40% / 160% no-repeat; mask: url(/img/curve.svg) 70% 40% / 160% no-repeat;
}
.tavola .cartiglio {
  position: absolute; right: 0; bottom: 0; background: var(--carta); border-left: 1px solid var(--inchiostro); border-top: 1px solid var(--inchiostro);
  display: grid; grid-template-columns: auto auto; gap: 4px 18px; padding: 12px 16px; color: var(--inchiostro);
}
.tavola .cartiglio span:nth-child(odd) { color: var(--grigio); }
.didascalia { display: flex; justify-content: space-between; gap: 16px; margin-top: 12px; color: var(--grigio); font-size: .9rem; }

/* --- elementi comuni --- */
.bottone {
  display: inline-flex; align-items: center; gap: 14px; border: 1px solid var(--inchiostro); padding: 14px 22px;
  font-size: .78rem; text-transform: uppercase; letter-spacing: .16em; font-weight: 500;
  transition: background .2s, color .2s;
}
.bottone::after { content: "\2192"; }
.bottone:hover { background: var(--inchiostro); color: var(--carta); }
.nota { border-left: 1px solid var(--lava); padding: 2px 0 2px 16px; color: var(--grigio); font-size: .95rem; margin: 28px 0; }
.dati { display: grid; grid-template-columns: max-content 1fr; gap: 10px 32px; margin: 0; }
.dati dt { color: var(--grigio); font-size: .72rem; text-transform: uppercase; letter-spacing: .16em; padding-top: .3em; }
.dati dd { margin: 0; }

/* --- piede --- */
footer.sito { padding: 64px 0 28px; }
footer.sito .grande { font: 700 clamp(3rem, 14vw, 11rem)/.85 var(--sans); letter-spacing: .12em; margin: 0 0 36px; color: var(--inchiostro); }
footer.sito .colonne { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; padding-top: 20px; border-top: 1px solid var(--inchiostro); }
footer.sito .colonne p { margin: 0; color: var(--grigio); font-size: .92rem; }
footer.sito .colonne a:hover { color: var(--inchiostro); }
footer.sito .piccolo { color: var(--grigio); margin-top: 40px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* --- comparsa morbida al caricamento --- */
@media (prefers-reduced-motion: no-preference) {
  main > * { animation: sale .8s cubic-bezier(.2,.7,.2,1) both; }
  main > *:nth-child(2) { animation-delay: .08s; }
  main > *:nth-child(3) { animation-delay: .16s; }
  @keyframes sale { from { opacity: 0; transform: translateY(14px); } }
}

/* --- schermi stretti --- */
@media (max-width: 820px) {
  .testata .etichetta, .testata h1, .testata .lead,
  .sezione .etichetta, .sezione .testo, .sezione .testo.largo { grid-column: 1 / -1; }
  .marchio span { display: none; }
  .indice a, .indice .riga { grid-template-columns: 2.4rem 1fr auto; }
  .indice .desc { grid-column: 2 / -1; }
}


/* ===== Manifesto (home): testo grande con rimandi numerati, alla maniera degli studi-laboratorio ===== */
.manifesto { background: var(--inchiostro); color: var(--carta); position: relative; overflow: hidden; }
.manifesto::before {
  content: ""; position: absolute; inset: 0; background: #ffffff; opacity: .09;
  -webkit-mask: url(/img/curve.svg) center / cover no-repeat; mask: url(/img/curve.svg) center / cover no-repeat;
}
.manifesto .wrap { position: relative; padding-top: clamp(80px, 14vh, 160px); padding-bottom: clamp(64px, 10vh, 120px); }
.manifesto .etichetta { color: #9a978f; margin: 0 0 28px; font-family: var(--mono); letter-spacing: .08em; }
.manifesto p.grande {
  font: 400 clamp(1.9rem, 4.6vw, 4.1rem)/1.12 var(--sans); letter-spacing: -.025em; margin: 0; max-width: 21ch;
}
.manifesto a { color: inherit; border-bottom: 2px solid currentColor; padding-bottom: .02em; transition: color .2s; }
.manifesto a:hover { color: var(--lava); }
.manifesto a sup {
  display: inline-grid; place-items: center; width: 1.05em; height: 1.05em; margin-left: .12em; border-radius: 50%;
  background: currentColor; font: 600 .32em/1 var(--mono); vertical-align: .9em;
}
.manifesto a sup span { color: var(--inchiostro); }
.manifesto .piede { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 64px; padding-top: 18px; border-top: 1px solid #3a3935; font: .78rem/1.4 var(--mono); color: #9a978f; }

/* ===== Registro dei progetti: tabella filtrabile ===== */
.filtri { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.filtri button {
  font: 500 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--grigio);
  background: none; border: 1px solid var(--filetto); border-radius: 999px; padding: 9px 14px; cursor: pointer;
}
.filtri button[aria-pressed="true"], .filtri button:hover { color: var(--carta); background: var(--inchiostro); border-color: var(--inchiostro); }
.registro { width: 100%; border-collapse: collapse; font-size: .95rem; }
.registro th { text-align: left; font: 500 .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--grigio); padding: 0 12px 12px 0; border-bottom: 1px solid var(--inchiostro); }
.registro td { padding: 18px 12px 18px 0; border-bottom: 1px solid var(--filetto); vertical-align: baseline; }
.registro td:first-child, .registro td.mono { font-family: var(--mono); font-size: .82rem; color: var(--grigio); white-space: nowrap; }
.registro td.nome { font-size: 1.25rem; letter-spacing: -.01em; }
.registro tr[data-link] { cursor: pointer; }
.registro tr[data-link]:hover td.nome { color: var(--lava); }
.registro tr.nascosta { display: none; }
.stato { display: inline-flex; align-items: center; gap: 8px; }
.stato::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--grigio); }
.stato.attivo::before { background: #2f9e5b; }
@media (max-width: 820px) { .registro .facoltativa { display: none; } }

/* ===== Finestra sul gemello: il modello 3D dentro la pagina, caricato su richiesta ===== */
.finestra { position: relative; aspect-ratio: 16 / 9; border: 1px solid var(--inchiostro); background: #111; overflow: hidden; }
.finestra iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.finestra .copertina {
  position: absolute; inset: 0; display: grid; place-content: center; gap: 18px; text-align: center; color: #fff;
  background: #121211; cursor: pointer; border: 0; width: 100%; font: inherit;
}
.finestra .copertina::before {
  content: ""; position: absolute; inset: 0; background: #fff; opacity: .14;
  -webkit-mask: url(/img/curve.svg) 60% 40% / 140% no-repeat; mask: url(/img/curve.svg) 60% 40% / 140% no-repeat;
}
.finestra .copertina > * { position: relative; }
.finestra .copertina b { font: 300 clamp(1.6rem, 3.4vw, 2.8rem)/1.1 var(--sans); letter-spacing: -.02em; }
.finestra .copertina span { font: .74rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: #bdbab2; }
.finestra .copertina:hover b { color: #ffb398; }
.barra-finestra { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 12px; font: .78rem/1.4 var(--mono); color: var(--grigio); }
.barra-finestra a { color: var(--inchiostro); border-bottom: 1px solid var(--filetto); }