/* Palette dello studio: blu, nero, grigi neutri e bianco. */
:root {
  --paper: #f5f6f8;
  --ink: #191b22;
  --muted: #565e6c;
  --line: #dce0e7;
  --accent: #2929d6;
  --dark: #171a23;
  --blue-light: #eceeff;
  --radius: 7px;
  --panel-radius: 11px;
}

body { background: var(--paper); }
h1, h2, h3 { color: inherit; }
h1 em { font-style: normal; color: var(--accent); }
.eyebrow { color: var(--muted); }
.site-header { background: #fff; }
.site-header nav { gap: 18px; }
.site-header nav > a { padding: 9px 10px; border-radius: var(--radius); }
.site-header nav > a:hover { color: var(--accent); background: var(--blue-light); }
.site-header a[aria-current="page"] { background: var(--blue-light); border-bottom: 0; }
.site-header .nav-contact {
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  padding: 10px 16px;
  gap: 18px;
}
.site-header .nav-contact:hover { background: #1b1ba7; color: #fff; }

.button, .text-link, .project-open, .project-filters button,
.gallery-toolbar button, .gallery-bottom button, .menu-toggle {
  border-radius: var(--radius);
  transition: background .18s, color .18s, border-color .18s, box-shadow .18s;
}
.button-dark {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #fff;
  box-shadow: 0 3px 0 #1b1ba7;
  font-weight: 600;
}
.button-dark:hover { background: #1b1ba7; border-color: #1b1ba7; }
.button-dark:active { box-shadow: 0 1px 0 #1b1ba7; transform: translateY(2px); }
.text-link {
  background: #fff;
  border: 1px solid #cbd0dc;
  color: var(--ink);
  padding: 10px 16px;
  min-height: 42px;
}
.text-link:hover { background: var(--blue-light); border-color: var(--accent); color: var(--accent); }
.hero-visual { border-radius: var(--panel-radius); overflow: hidden; color: #cad0df; }
.drawing-caption, .drawing-footer { color: #cad0df; }
.engineering-drawing [stroke="#688186"] { stroke: #828b9f; }
.engineering-drawing [stroke="#c7d4cf"] { stroke: #e0e4ed; }
.engineering-drawing [stroke="#d9926d"] { stroke: #8585ff; }
.engineering-drawing [stroke="#7ca6ad"] { stroke: #969ced; }
.engineering-drawing [stroke="#82999a"] { stroke: #8d95a8; }
.engineering-drawing [fill="#9cb2b3"] { fill: #b8bfd0; }

.service-list { border-top: 0; }
.service-list details {
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: #fff;
  overflow: hidden;
  margin-bottom: 11px;
}
.service-list summary { padding: 22px 24px; }
.service-list summary:hover { background: #f0f2f8; }
.service-list details[open] { border-color: #aaaee9; }
.service-list details[open] summary { background: var(--blue-light); }
.service-list .service-body { padding: 24px 30px 27px 83px; }
.expand {
  background: #eef0f5;
  border-radius: 5px;
  color: var(--accent);
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
}
.public-inner > .eyebrow, .project-focus .eyebrow { color: #bfc5d5; }
.public-inner p:not(.eyebrow), .project-focus p:not(.eyebrow) { color: #d1d5df; }
.public-symbol { color: #9999ff; }
.public-works .text-link { background: #fff; color: var(--ink); border-color: #fff; }
.public-works .text-link:hover { background: var(--blue-light); color: var(--accent); }
.contact { background: #e9ecf2; }
.contact-label { color: #505866; }
.contact-phone, .contact-email { border-radius: var(--radius); }
.contact-phone:hover, .contact-email:hover { color: var(--accent); }

.project-filters button {
  background: #fff;
  border-color: #cbd0dc;
  padding: 10px 17px;
  font-weight: 500;
}
.project-filters button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.project-filters button:hover { background: var(--blue-light); border-color: var(--accent); color: var(--accent); }
.project-filters button[aria-pressed="true"]:hover { background: #1b1ba7; color: #fff; }
.project-card { border-radius: var(--panel-radius); }
.project-card-image { border-radius: var(--panel-radius); background: #e7eaf0; }
.image-kind { background: #fff; color: var(--ink); border-radius: 5px; }
.project-open {
  display: inline-flex;
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #fff;
  padding: 9px 15px;
  gap: 24px;
  min-height: 42px;
}
.project-open > span { color: #fff; font-size: 19px; }
.project-card-link:hover .project-open { background: #1b1ba7; border-color: #1b1ba7; }
.project-card--featured { overflow: hidden; }
.project-card--featured .project-card-image { border-radius: 0; }
.project-card--featured .eyebrow { color: #ababff; }
.project-card--featured .project-place, .project-card--featured .project-summary,
.project-card--featured .eyebrow > span { color: #d1d5df; }
.project-card--featured .project-open > span { color: #fff; }
.project-cover > img { border-radius: var(--panel-radius); background: #e7eaf0; }
.project-figure > a, .gallery-large { border-radius: var(--panel-radius); overflow: hidden; }
.gallery-enlarge { background: var(--accent); color: #fff; border-radius: 5px; }
.project-figure > a:hover .gallery-enlarge { background: #1b1ba7; }
.gallery-dialog { border-radius: var(--panel-radius); }
.gallery-dialog::backdrop { background: #11141ceb; }
.gallery-toolbar button, .gallery-bottom button { background: #fff; border-color: #cbd0dc; }
.gallery-toolbar button:hover, .gallery-bottom button:hover { background: var(--accent); border-color: var(--accent); }
.back-link { padding: 9px 13px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); }
.back-link:hover { background: var(--blue-light); border-color: var(--accent); }
.next-project-link { padding: 16px 20px; border-radius: var(--panel-radius); }
.next-project-link:hover { background: var(--blue-light); }

.service-references {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.service-references h4 {
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink);
}
.service-references p { font-size: 12px; line-height: 1.85; margin: 0 0 7px; }
.service-references strong { font-weight: 600; color: var(--ink); }
.service-references a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.service-references a:hover { color: #161684; }
.services-norm-note { font-size: 11px; color: var(--muted); line-height: 1.8; margin: 20px 0 0; max-width: 850px; }

.hero-photos { align-self: center; min-width: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--panel-radius); overflow: hidden; }
.hero-photo-frame { margin: 0; }
.hero-main-photo { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; object-position: center 54%; background: #e8ebf2; }
.hero-photo-caption { display: flex; flex-direction: column; gap: 4px; padding: 19px 22px 15px; }
.hero-photo-title { font: 23px/1.3 var(--serif); color: var(--ink); }
.hero-photo-description { color: var(--muted); font-size: 12px; line-height: 1.6; }
.hero-photo-choices { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; padding: 0 18px 18px; }
.hero-photo-choices[hidden] { display: none; }
.hero-photo-choice { cursor: pointer; position: relative; display: block; padding: 3px; border: 2px solid transparent; background: #fff; border-radius: 7px; min-width: 0; }
.hero-photo-choice img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 3px; }
.hero-photo-choice > span { position: absolute; right: 7px; bottom: 6px; font-size: 8px; line-height: 1.5; background: #171a23d9; color: #fff; padding: 1px 4px; border-radius: 2px; }
.hero-photo-choice[aria-pressed="true"] { border-color: var(--accent); background: var(--blue-light); }
.hero-photo-choice:hover { border-color: #aaaee9; }
.hero-photo-choice[aria-pressed="true"]:hover { border-color: var(--accent); }
@media (max-width: 760px) {
  .hero-photos { width: 100%; max-width: 550px; margin: 0 auto; }
  .hero-main-photo { aspect-ratio: 4 / 3; }
  .hero-photo-caption { padding: 16px 17px 13px; }
  .hero-photo-title { font-size: 22px; }
  .hero-photo-choices { padding: 0 12px 14px; gap: 5px; }
}

@media (min-width: 761px) and (max-width: 1000px) {
  .brand-logo { width: 225px; }
  .site-header nav { gap: 5px; }
  .site-header nav > a { padding: 9px 7px; }
  .site-header .nav-contact { padding: 10px 12px; gap: 10px; }
}
@media (max-width: 760px) {
  .menu-toggle { border: 1px solid var(--line); background: #f0f2f7; padding: 7px 11px; }
  .site-header nav { gap: 8px; }
  .service-list summary { padding: 19px 15px; gap: 12px; }
  .service-list .service-body { padding: 20px 18px 24px; }
  .project-filters button { padding: 9px 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .button, .text-link, .project-open, .project-filters button,
  .gallery-toolbar button, .gallery-bottom button, .menu-toggle { transition: none; }
}

.site-footer { flex-wrap: wrap; }