/* Cantiere delle Idee — Design System
   ANCE Toscana / Fiera dell'Edilizia 2026
   Editoriale, denso, mai decorativo. */

:root {
  /* Palette brand Generazione Cantiere 2026 */
  --c-blu: #055199;        /* primario */
  --c-blu-deep: #043e74;
  --c-blu-soft: #2772b5;
  --c-giallo: #fbea26;     /* primario */
  --c-giallo-deep: #d8c81f;
  --c-magenta: #e84082;    /* terzo (CTA, accenti) */
  --c-magenta-deep: #c52d6a;
  --c-celeste: #37beed;    /* extra (decorativo) */

  /* Backgrounds & ink (poco contrasto col bianco, niente carta naturale) */
  --c-bg: #FFFFFF;
  --c-bg-elev: #FFFFFF;
  --c-bg-sunken: #F4F1EA;
  --c-ink: #14171C;
  --c-ink-soft: #4B5159;
  --c-ink-mute: #8A8E94;
  --c-line: #E1DEDA;
  --c-line-strong: #C0BCB6;

  /* Alias retrocompat — i moduli esistenti usano questi nomi */
  --c-accent: var(--c-giallo);
  --c-accent-deep: var(--c-giallo-deep);
  --c-accent-ink: var(--c-blu);  /* testo blu su sfondo giallo */

  --c-area-a: var(--c-blu);
  --c-area-b: var(--c-celeste);
  --c-area-c: var(--c-magenta);

  --c-success: #2D7A4F;
  --c-warning: #C97A1F;
  --c-danger: #B3322B;

  --radius: 6px;
  --radius-sm: 3px;
  --shadow-card: 0 1px 2px rgba(20, 22, 26, 0.05), 0 8px 24px rgba(20, 22, 26, 0.06);
  --shadow-card-hover: 0 2px 4px rgba(20, 22, 26, 0.08), 0 18px 40px rgba(20, 22, 26, 0.10);

  --font-stack: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Charter", "Georgia", serif;
  --font-mono: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
}

/* Background neutro pulito — il colore arriva dalle sezioni accent (hero giallo, ecc.) */

a { color: inherit; }
button { font-family: inherit; }

/* ---------- Layout ---------- */

.shell {
  max-width: 1320px;
  margin: 0 auto;
  padding: 40px 32px 96px;
}

@media (min-width: 1600px) {
  .shell { max-width: 1600px; padding: 56px 64px 120px; }
}

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 28px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--c-line);
  position: relative;
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 80px;
  height: 4px;
  background: var(--c-blu);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-header__logo {
  display: block;
  height: 48px;
  width: auto;
  max-width: 100%;
}
@media (min-width: 720px) { .site-header__logo { height: 44px; } }

@media (max-width: 640px) {
  .site-header__meta { display: none; }
}

.site-header__meta {
  font-size: 11px;
  color: var(--c-ink-soft);
  text-align: right;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  line-height: 1.7;
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 44px 36px;
  margin: 0 0 56px;
  background: var(--c-giallo);
  border: 1px solid var(--c-giallo-deep);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

/* Triangolo magenta decorativo angolo bottom-right, mimick stile sito GCT */
.hero::before {
  content: "";
  position: absolute;
  bottom: -1px; right: -1px;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 0 56px 56px;
  border-color: transparent transparent var(--c-magenta) transparent;
  pointer-events: none;
}

.hero__copy { position: relative; z-index: 1; }

.hero__brand {
  display: block;
  width: 280px;
  max-width: 100%;
  height: auto;
  margin: 0 0 20px;
  background: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
}

.hero__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.02;
  color: var(--c-blu);
  text-transform: uppercase;
}

.hero__lede {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.55;
  color: var(--c-blu);
  max-width: 48ch;
}

.hero__lede em { color: var(--c-blu); font-style: normal; font-weight: 700; }
.hero__lede strong { color: var(--c-blu); font-weight: 700; }

.hero__cta { font-size: 14px; }

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__visual img {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 28px 22px;
    gap: 20px;
  }
  .hero__title { font-size: 30px; }
  .hero__visual img { max-width: 280px; }
  .hero::before { display: none; }
}

/* ---------- Section heading ---------- */

.section-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-blu);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.section-title::before {
  content: "";
  width: 18px;
  height: 3px;
  background: var(--c-magenta);
}

.section-lede {
  max-width: 680px;
  font-size: 16px;
  color: var(--c-ink-soft);
  margin: 0 0 36px;
  line-height: 1.6;
}

.section-lede em { color: var(--c-ink); font-style: normal; font-weight: 500; }
.section-lede strong { color: var(--c-ink); font-weight: 600; }

/* ---------- Gallery grid ---------- */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

@media (min-width: 1600px) {
  .gallery { grid-template-columns: repeat(3, 1fr); gap: 32px; }
}

.card {
  background: var(--c-bg-elev);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
              box-shadow 200ms cubic-bezier(0.2, 0.7, 0.2, 1),
              border-color 200ms ease;
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--c-accent);
  transition: width 240ms cubic-bezier(0.2, 0.7, 0.2, 1);
  z-index: 2;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--c-line-strong);
}

.card:hover::before { width: 100%; }

.card__thumb {
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(circle at 30% 20%, rgba(242, 194, 0, 0.10), transparent 55%),
    linear-gradient(135deg, #EEECE6 0%, #DDD9CF 100%);
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--c-line);
  position: relative;
  overflow: hidden;
}

.card__thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(20, 22, 26, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 22, 26, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.card__thumb svg {
  width: 70%;
  height: 70%;
  position: relative;
  z-index: 1;
}

.card__body {
  padding: 22px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
}

.card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 2px;
}

.badge {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 2px;
  background: transparent;
  color: var(--c-ink-soft);
  border: 1px solid var(--c-line-strong);
}

.badge--area-a { color: #fff; background: var(--c-area-a); border-color: var(--c-area-a); }
.badge--area-b { color: #fff; background: var(--c-area-b); border-color: var(--c-area-b); }
.badge--area-c { color: #fff; background: var(--c-area-c); border-color: var(--c-area-c); }
.badge--traccia {
  background: var(--c-blu);
  color: var(--c-giallo);
  border-color: var(--c-blu);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
  line-height: 1.25;
}

.card__desc {
  font-size: 14px;
  color: var(--c-ink-soft);
  margin: 0;
  line-height: 1.5;
}

.card__meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed var(--c-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--c-ink-soft);
}

.card__author {
  font-weight: 500;
  letter-spacing: 0.01em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--c-ink);
  color: #fff;
  border: 1px solid var(--c-ink);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 3px;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 120ms ease;
  font-family: inherit;
}

.btn:hover {
  background: var(--c-accent);
  color: var(--c-accent-ink);
  border-color: var(--c-accent);
}

.btn:active { transform: translateY(1px); }

.btn::after {
  content: "→";
  font-size: 14px;
  line-height: 1;
  transition: transform 160ms ease;
}

.btn:hover::after { transform: translateX(3px); }

.btn--ghost {
  background: transparent;
  color: var(--c-ink);
}
.btn--ghost::after { content: ""; }
.btn--ghost:hover { background: var(--c-ink); color: #fff; }

.btn--primary {
  background: var(--c-magenta);
  color: #fff;
  border-color: var(--c-magenta);
}
.btn--primary:hover {
  background: var(--c-magenta-deep);
  color: #fff;
  border-color: var(--c-magenta-deep);
}

.btn--no-arrow::after { content: ""; }

.btn[disabled], .btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}
.btn:disabled:hover { background: var(--c-ink); color: #fff; border-color: var(--c-ink); }

/* ---------- Empty state ---------- */

.empty-state {
  padding: 56px 24px;
  text-align: center;
  border: 1px dashed var(--c-line-strong);
  border-radius: var(--radius);
  color: var(--c-ink-soft);
  background: rgba(255, 255, 255, 0.4);
}

.empty-state h2 { margin: 0 0 8px; font-size: 18px; color: var(--c-ink); font-family: var(--font-display); }
.empty-state p { margin: 0; font-size: 14px; }

/* ---------- Footer ---------- */

.site-footer {
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--c-line);
  font-size: 12px;
  color: var(--c-ink-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  letter-spacing: 0.02em;
}

.site-footer__brands {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.site-footer__brands img {
  display: block;
  height: 40px;
  width: auto;
  opacity: 0.85;
  object-fit: contain;
}

.site-footer__meta {
  text-align: right;
  flex: 0 0 auto;
}

@media (max-width: 640px) {
  .site-footer { flex-direction: column; align-items: flex-start; gap: 16px; }
  .site-footer__brands { gap: 18px; }
  .site-footer__brands img { height: 32px; }
  .site-footer__meta { text-align: left; }
}

/* ---------- Game shell (shared) ---------- */

.game-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 96px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--c-line);
  gap: 16px;
  position: relative;
}

.game-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--c-accent);
}

.game-header__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.game-header__sub {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--c-ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.panel {
  background: var(--c-bg-elev);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px;
}

.stack > * + * { margin-top: 16px; }
.stack-tight > * + * { margin-top: 8px; }

.muted { color: var(--c-ink-soft); }
.small { font-size: 13px; }
.center { text-align: center; }

/* ---------- Utility: focus ring ---------- */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

[hidden] { display: none !important; }