/* ==========================================================================
   AES — Accademia Europea delle Scienze / European Science Academy
   Foglio di stile condiviso — design responsive, leggero, accessibile
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-text: #14202b;
  --color-muted: #4d5c68;
  --color-primary: #1f5f8b;      /* blu istituzionale, richiama lo sfondo storico del sito */
  --color-primary-dark: #163f5c;
  --color-link: #1f5f8b;
  --color-link-visited: #5a3b8f;
  --color-border: #d4dfe6;
  --color-surface: #f3f7fa;
  --color-header-bg: #fbfdfe;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #10161c;
    --color-text: #e7edf2;
    --color-muted: #a9b7c2;
    --color-primary: #7fb4dd;
    --color-primary-dark: #a7cbe8;
    --color-link: #8fc0e6;
    --color-link-visited: #c3b3f0;
    --color-border: #2b3944;
    --color-surface: #17212a;
    --color-header-bg: #131b22;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

img { max-width: 100%; height: auto; }

a { color: var(--color-link); }
a:visited { color: var(--color-link-visited); }
a:hover, a:focus { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75em 1em;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Header / navigazione ---------- */
.site-header {
  background: var(--color-header-bg);
  border-bottom: 3px solid var(--color-primary);
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem 1rem;
  text-align: center;
}

.site-title {
  font-family: var(--font-serif);
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  color: var(--color-primary);
}

.site-title a { color: inherit; text-decoration: none; }

.site-subtitle {
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.site-nav { margin-top: 1rem; }

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0.5rem;
  padding: 0;
  margin: 0;
}

.site-nav a {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  text-decoration: none;
  color: var(--color-text);
  border-radius: 4px;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a:focus {
  background: var(--color-surface);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  background: var(--color-primary);
  color: #fff;
  font-weight: bold;
}

/* ---------- Banner versione (anteprima sito nuovo) ---------- */
.version-banner {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10000;
  background: #1f6f3f;
  color: #ffffff;
  padding: 14px 16px;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

.version-banner a {
  display: inline-block;
  background: #ffffff;
  color: #1f6f3f;
  padding: 7px 16px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  margin-left: 12px;
}

.version-banner a:visited { color: #1f6f3f; }
.version-banner a:hover, .version-banner a:focus { text-decoration: none; opacity: 0.9; }

/* Selettore lingua: barra separata, sopra l'header, per le 14 lingue.
   Colori fissi (non legati alle variabili di tema chiaro/scuro): la barra
   deve restare leggibile in entrambi i temi, e --color-primary-dark si
   inverte da scuro a chiaro passando al tema scuro, il che vanificava il
   contrasto con il testo bianco. */
.lang-bar {
  background: #0c2438;
  color: #ffffff;
  text-align: center;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  line-height: 1.7;
}
.lang-bar a { color: #ffffff; text-decoration: none; margin: 0 0.25rem; }
.lang-bar a:visited { color: #ffffff; }
.lang-bar a:hover, .lang-bar a:focus { text-decoration: underline; }
.lang-bar a[aria-current="true"] { font-weight: bold; text-decoration: underline; color: #ffd166; }

/* ---------- Contenuto ---------- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-title {
  font-family: var(--font-serif);
  color: var(--color-primary);
  text-align: center;
  margin-top: 0;
}

.lead {
  text-align: center;
  color: var(--color-muted);
  font-size: 1.1rem;
  max-width: 40em;
  margin: 0 auto 2rem;
}

h1, h2, h3 { font-family: var(--font-serif); line-height: 1.3; }

h2 {
  color: var(--color-primary-dark);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.3rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.home-grid a.tile {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.home-grid a.tile:hover,
.home-grid a.tile:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(20, 32, 43, 0.1);
  text-decoration: none;
}

.home-grid a.tile h2 {
  margin: 0 0 0.4rem;
  border: none;
  padding: 0;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.home-grid a.tile p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }

/* ---------- Presidente ---------- */
.presidente-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
}

.presidente-photo { flex: 0 0 220px; text-align: center; }

.presidente-photo img {
  width: 220px;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.presidente-bio { flex: 1 1 320px; }

.presidente-contact { margin-top: 0.75rem; font-size: 0.95rem; }

/* ---------- Liste scopi / discipline / pubblicazioni ---------- */
.scopi-list, .aree-list {
  columns: 1;
  padding-left: 1.25rem;
}

.scopi-list li, .aree-list li { margin-bottom: 0.6rem; }

.pub-list { list-style: none; padding-left: 0; }

.pub-list li {
  margin-bottom: 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dotted var(--color-border);
}

.pub-title { display: block; font-weight: 600; }
.pub-dedica { display: block; color: var(--color-muted); font-style: italic; font-size: 0.95rem; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 2rem 1rem;
  margin-top: 3rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.site-footer a { color: var(--color-muted); }

/* ---------- Responsive ---------- */
@media (min-width: 700px) {
  .scopi-list, .aree-list { columns: 2; column-gap: 2.5rem; }
  .site-title { font-size: 2rem; }
}

@media print {
  .site-nav, .site-footer, .lang-bar, .version-banner { display: none; }
}