/* base.css - variabili globali e utility comuni */
:root {
  --page-bg: #000000;
  --ottanio: var(--page-bg);
  --black: #000000;
  --white: #ffffff;

  /* Semantic theme tokens (preferire questi ai colori hardcoded) */
  --text-color: var(--white);
  --text-muted: #666;
  --text-on-light: #111;
  --accent-gold: #ffd700;

  /* Responsive sizing tokens */
  --ui-pad: clamp(10px, 1.6vw, 16px);
  --ui-gap: clamp(10px, 1.6vw, 16px);
  --ui-border: clamp(4px, 0.9vw, 8px);

  --font-sm: clamp(13px, 1.0vw, 15px);
  --font-base: clamp(14px, 1.1vw, 16px);
  --font-lg: clamp(15px, 1.25vw, 17px);
  --font-xl: clamp(16px, 1.5vw, 18px);

  --square-col-width: clamp(108px, 12vw, 160px);
  --square-dot-size: clamp(10px, 1.1vw, 12px);
  --square-label-size: var(--font-base);
  --place-image-max: clamp(260px, 34vw, 560px);

  --btns-offset-y: 24px;
  --north-offset-y: -6px;
  --east-offset-x: 24px;
  --south-offset-y: -6px;
  --west-offset-x: 20px;
  --accent-green: #32cd32;
  --accent-gray: #757575;
}

html, body { height:100%; }

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

/* Utility */
.no-select { user-select: none; }
.visually-hidden { position:absolute !important; width:1px !important; height:1px !important; padding:0 !important; margin:-1px !important; overflow:hidden !important; clip:rect(0 0 0 0) !important; white-space:nowrap !important; border:0 !important; }
.is-hidden { display: none !important; }

/* Base body fallback (solo se nessun foglio successivo sovrascrive) */
body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text-color);
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: var(--font-base);
  line-height: 1.35;
}

/* --- Intro page (odessa_intro.html) --- */
body.page-intro {
  overflow: auto; /* Permette lo scroll solo se necessario */
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

.page-intro #mainImage {
  width: auto;
  max-width: 75%;
  max-height: 75vh;
  max-height: 75svh;
  height: auto;
  object-fit: contain;
  margin-top: 10px;
  margin-bottom: 1em;
  display: block;
  margin-left: auto;
  margin-right: auto;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .page-intro #mainImage {
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: 75svh;
  }

  .page-intro #introduzione {
    max-width: 92%;
  }
}

.page-intro #introduzione {
  max-width: 75%;
  text-align: justify;
  margin-left: auto;
  margin-right: auto;
  padding: 0 0 50px 0;
  flex: 1;
  overflow-y: visible;
}

/* Riduce flicker/layout shift mentre viene aggiornato l'HTML del markdown */
.page-intro #introduzione.is-loading {
  visibility: hidden;
}

.page-intro #introduzione * { margin: 0; padding: 0; }
.page-intro #introduzione p { margin: 0 0 10px; }

.page-intro .continue-hint {
  margin-top: 12px;
  text-align: center;
  font-size: var(--font-sm);
  color: var(--text-muted);
}

.page-intro #mainImage,
.page-intro .dual-images__img {
  cursor: pointer;
}

.page-intro #mainImage:focus-visible,
.page-intro .dual-images__img:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 3px;
}

.page-intro .dual-images {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 10px;
  margin-bottom: 1em;
}

.page-intro .dual-images__img {
  width: 40%;
  height: auto;
  flex-shrink: 0;
  display: block;
}