/* Fotonic. Un solo carattere, Archivo, usato su due larghezze:
   espanso e leggero per titoli e indice, normale per testi e dati. */

:root {
  --paper: #F2F3F1;
  --ink: #1D2125;
  --mute: #686E74;
  --rule: #CFD2D3;
  --ph: #DADCDC;
  --light: #E9C33F;

  --gutter: clamp(16px, 4vw, 56px);
  --step--1: 0.8125rem;
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem);
  --step-3: clamp(2rem, 1.2rem + 3.6vw, 4.25rem);
  --step-4: clamp(2.5rem, 1rem + 6vw, 6.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Archivo', system-ui, sans-serif;
  font-variation-settings: 'wdth' 100;
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; background: var(--ph); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-color: var(--mute); }
:focus-visible { outline: 3px solid var(--light); outline-offset: 3px; }
h1, h2, p, ul, dl, dd, figure { margin: 0; }
:where(ul[role="list"]) { list-style: none; padding: 0; }

.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { left: var(--gutter); top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 10; }

/* ---------- testata e piede ---------- */

.site-header {
  display: flex; align-items: baseline; justify-content: space-between; gap: 24px;
  padding: 22px var(--gutter);
}
.wordmark {
  font-variation-settings: 'wdth' 125; font-weight: 600; font-size: var(--step-1);
  letter-spacing: 0.01em; text-decoration: none;
}
.site-nav { display: flex; gap: clamp(16px, 3vw, 36px); font-size: var(--step-0); }
.site-nav a { text-decoration: none; color: var(--mute); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"] { text-decoration: underline; }

.site-footer {
  display: grid; gap: 20px; grid-template-columns: 1fr;
  margin-top: clamp(72px, 12vw, 160px);
  padding: 32px var(--gutter) 40px;
  border-top: 1px solid var(--rule);
  font-size: var(--step--1); color: var(--mute);
}
.site-footer a { color: var(--ink); }
@media (min-width: 760px) {
  .site-footer { grid-template-columns: 2fr 2fr 3fr; }
  .footer-legal { text-align: right; }
}

/* ---------- home ---------- */

.hero { padding: 0 var(--gutter); }
.hero-image { display: block; }
.hero-image img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
@media (min-width: 900px) { .hero-image img { aspect-ratio: 21 / 9; } }
.hero-caption { margin-top: 10px; font-size: var(--step--1); color: var(--mute); }
.hero-caption a { color: var(--ink); text-decoration: none; }

.intro {
  padding: clamp(56px, 10vw, 140px) var(--gutter) 0;
  display: grid; gap: 28px;
}
.intro-text {
  font-variation-settings: 'wdth' 118; font-weight: 300;
  font-size: var(--step-3); line-height: 1.08; letter-spacing: -0.01em;
  max-width: 17ch;
}
.intro-sub { max-width: 52ch; color: var(--mute); font-size: var(--step-1); line-height: 1.5; }
@media (min-width: 1100px) {
  .intro { grid-template-columns: 7fr 4fr; align-items: end; }
}

/* L'indice è l'elemento forte del sito: titoli larghi e leggeri, come luce su una parete. */
.index { padding: clamp(64px, 10vw, 140px) var(--gutter) 0; }
.section-h { font-size: var(--step-0); font-weight: 500; color: var(--mute); margin-bottom: 20px; }
.index-list { border-top: 1px solid var(--ink); }
.index-row { border-bottom: 1px solid var(--rule); }
.index-row a {
  position: relative;
  display: grid; grid-template-columns: auto auto 1fr; gap: 6px 16px; align-items: baseline;
  padding: 18px 0 20px; text-decoration: none;
}
.index-title {
  grid-column: 1 / -1;
  font-variation-settings: 'wdth' 125; font-weight: 300;
  font-size: var(--step-4); line-height: 1; letter-spacing: -0.02em;
  transition: color 0.2s;
}
.index-meta { font-size: var(--step--1); color: var(--mute); }
.index-year { font-variant-numeric: tabular-nums; text-align: right; }
.index-preview { display: none; }

@media (min-width: 900px) {
  .index-row a { grid-template-columns: minmax(0, 1fr) 11rem 9rem 3.5rem; padding: 22px 0; }
  .index-title { grid-column: auto; font-size: var(--step-3); }
  .index-year { text-align: right; }
  .index-preview {
    display: block; position: absolute; z-index: 2; pointer-events: none;
    right: 0; top: 50%; width: min(20vw, 280px);
    transform: translateY(-50%); opacity: 0; transition: opacity 0.2s;
  }
  .index-row a:hover .index-preview, .index-row a:focus-visible .index-preview { opacity: 1; }
  .index-list:hover .index-title { color: var(--mute); }
  .index-list:hover .index-row a:hover .index-title { color: var(--ink); }
}
.index-more { margin-top: 28px; }

/* ---------- testate di pagina ---------- */

.page-head { padding: clamp(40px, 8vw, 110px) var(--gutter) clamp(32px, 5vw, 64px); }
.page-title {
  font-variation-settings: 'wdth' 125; font-weight: 300;
  font-size: var(--step-4); line-height: 1; letter-spacing: -0.02em;
  max-width: 14ch;
}
.page-lead { margin-top: 28px; max-width: 46ch; font-size: var(--step-1); line-height: 1.5; color: var(--mute); }
.prose > p + p { margin-top: 1em; }
.prose > p:not(.page-lead) { max-width: 62ch; }
.contact-big { font-variation-settings: 'wdth' 118; font-weight: 400; font-size: var(--step-2); margin: 40px 0 8px; }

/* ---------- archivio ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 40px; }
.filters[hidden] { display: none; }
.filter, .filter-reset {
  font: inherit; color: var(--mute); background: none; border: 0; padding: 4px 0; cursor: pointer;
  border-bottom: 2px solid transparent;
}
.filter:hover { color: var(--ink); }
.filter[aria-pressed="true"] { color: var(--ink); border-bottom-color: var(--light); }
.filter-reset { color: var(--ink); text-decoration: underline; }

.grid {
  display: grid; gap: clamp(40px, 6vw, 72px) clamp(16px, 3vw, 40px);
  padding: 0 var(--gutter);
}
@media (min-width: 760px) { .grid { grid-template-columns: 1fr 1fr; } }
.card a { display: block; text-decoration: none; }
.card-image img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.card-title { display: block; margin-top: 14px; font-variation-settings: 'wdth' 118; font-size: var(--step-1); }
.card-meta { display: block; margin-top: 2px; font-size: var(--step--1); color: var(--mute); }
.card a:hover .card-title { text-decoration: underline; }
.card[hidden] { display: none; }
.grid-empty { padding: 0 var(--gutter); color: var(--mute); }

/* ---------- progetto ---------- */

.project-head { display: grid; gap: 32px; padding: clamp(40px, 8vw, 110px) var(--gutter) clamp(40px, 6vw, 80px); }
.project-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 24px; font-size: var(--step--1); }
.project-facts dt { color: var(--mute); }
.project-text { max-width: 58ch; font-size: var(--step-1); line-height: 1.55; }
@media (min-width: 1000px) {
  .project-head { grid-template-columns: 7fr 5fr; grid-template-areas: 'title title' 'facts text'; column-gap: 48px; }
  .project-head .page-title { grid-area: title; max-width: 18ch; }
  .project-facts { grid-area: facts; align-self: start; grid-template-columns: repeat(4, auto); justify-content: start; column-gap: 40px; }
  .project-text { grid-area: text; }
}

.gallery { display: grid; gap: clamp(16px, 2.4vw, 32px); padding: 0 var(--gutter); }
.g-row { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.g-row img { width: 100%; }
@media (min-width: 760px) {
  .g-pair { grid-template-columns: 1fr 1fr; align-items: start; }
  .g-single figure { width: 50%; margin: 0 auto; }
}

.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  margin-top: clamp(64px, 10vw, 120px); padding: 28px var(--gutter) 0;
  border-top: 1px solid var(--rule);
}
.pager a { text-decoration: none; font-variation-settings: 'wdth' 118; font-size: var(--step-1); line-height: 1.25; }
.pager a span { display: block; font-variation-settings: 'wdth' 100; font-size: var(--step--1); color: var(--mute); margin-bottom: 6px; }
.pager-next { text-align: right; }
.pager a:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}