/* ==========================================================================
   L.U.I.R.S. — Libera Università Internazionale per la Ricerca Scientifica
   Foglio di stile condiviso — design responsive, leggero, accessibile
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #555555;
  --color-primary: #7a1f1f;      /* bordeaux istituzionale, richiama lo stile accademico */
  --color-primary-dark: #5c1717;
  --color-link: #7a1f1f;
  --color-link-visited: #4b3b8f;
  --color-border: #ddd2c8;
  --color-surface: #faf7f2;
  --color-header-bg: #fffdf9;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1000px; /* = larghezza nativa del watermark sfondo-classico.gif (1000x998) */
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #171412;
    --color-text: #ece7e1;
    --color-muted: #b9b0a6;
    --color-primary: #d99a9a;
    --color-primary-dark: #e8b8b8;
    --color-link: #e3a9a9;
    --color-link-visited: #c3b3f0;
    --color-border: #3a332c;
    --color-surface: #211d19;
    --color-header-bg: #1c1815;
  }
}

* { 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; }

/* ---------- Banner versione (solo home) ---------- */
.version-banner {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  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; }

/* ---------- Barra opzioni (toggle sfondo classico) ---------- */
.options-bar {
  text-align: center;
  padding: 0.5rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

.theme-toggle input { cursor: pointer; }

/* ---------- Tema "sfondo classico" ---------- */
body.theme-classic {
  background: #ffffff;
  font-family: "Times New Roman", Times, serif;
}

body.theme-classic .site-header,
body.theme-classic .options-bar {
  background: #ffffff;
}

body.theme-classic main {
  background: #ffffff url("../images/sfondo-classico.gif") repeat;
  border: 1px solid #999999;
  border-radius: 0;
}

body.theme-classic h1,
body.theme-classic h2,
body.theme-classic h3,
body.theme-classic .site-title {
  font-family: "Times New Roman", Times, serif;
}

body.theme-classic a { color: blue; }
body.theme-classic a:visited { color: purple; }

body.theme-classic .home-grid a.tile,
body.theme-classic .card,
body.theme-classic .pub-note {
  background: rgba(250, 247, 242, 0.9);
}

@media (prefers-color-scheme: dark) {
  body.theme-classic {
    background: #ffffff;
    color: #1a1a1a;
  }
  body.theme-classic .site-header,
  body.theme-classic .options-bar {
    background: #ffffff;
    color: #1a1a1a;
  }
  body.theme-classic main {
    background: #ffffff url("../images/sfondo-classico.gif") repeat;
    color: #1a1a1a;
  }
}

/* ---------- 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: 0.04em;
  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;
}

/* ---------- 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(0,0,0,0.08);
  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; }

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

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

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

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

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

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

.scopi-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; }

.pub-note {
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

/* ---------- Elogi ---------- */
.elogio {
  margin: 2.5rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.elogio:first-of-type { border-top: none; padding-top: 0; }

.elogio-intro { color: var(--color-muted); text-align: center; margin-bottom: 0.25rem; }

.elogio-nome {
  text-align: center;
  font-family: var(--font-serif);
  color: var(--color-primary);
  margin: 0.25rem 0 0.1rem;
}

.elogio-carica {
  text-align: center;
  color: var(--color-muted);
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.elogio-testo {
  font-family: var(--font-serif);
  max-width: 42em;
  margin: 0 auto;
}

.elogio-photo { text-align: center; margin: 1rem 0; }
.elogio-photo img { max-width: 220px; border: 1px solid var(--color-border); border-radius: 6px; }
.elogio-photo figcaption { font-size: 0.85rem; color: var(--color-muted); margin-top: 0.35rem; }

/* ---------- 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 { columns: 2; column-gap: 2.5rem; }
  .site-title { font-size: 2rem; }
}

@media print {
  .site-nav, .site-footer { display: none; }
}