/* ============================================================
   AIRLab — Main Stylesheet
   Autore: AIRLab Web
   Note: Tema scuro default, variabili CSS per switch tema,
         font Syne (display) + Source Serif 4 (body)
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,600;1,8..60,300&family=JetBrains+Mono:wght@400;500&display=swap');

/* ══════════════════════════════════════════════
   1. VARIABILI CSS — Tema Scuro (default)
   ══════════════════════════════════════════════ */
:root {
  /* Palette */
  --clr-bg:          #0b0e14;
  --clr-bg-2:        #111620;
  --clr-bg-3:        #171d2b;
  --clr-surface:     #1c2333;
  --clr-border:      #252e42;
  --clr-border-2:    #2e3a52;

  --clr-text:        #e8edf5;
  --clr-text-2:      #9aaabe;
  --clr-text-3:      #6b7d99;

  --clr-accent:      #4f8ef7;
  --clr-accent-2:    #7fb3ff;
  --clr-accent-glow: rgba(79, 142, 247, 0.18);

  --clr-success:     #3ecf8e;
  --clr-warning:     #f5a623;
  --clr-tag-bg:      rgba(79, 142, 247, 0.12);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'Source Serif 4', Georgia, serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* Spacing scale */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;

  /* Sizes */
  --container: 1160px;
  --nav-h: 68px;

  /* Radii */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.50);

  /* Transitions */
  --tr: 0.22s ease;
  --tr-slow: 0.4s ease;
}

/* ══════════════════════════════════════════════
   2. TEMA CHIARO
   ══════════════════════════════════════════════ */
[data-theme="light"] {
  --clr-bg:          #f4f6fb;
  --clr-bg-2:        #eef1f8;
  --clr-bg-3:        #e7ecf5;
  --clr-surface:     #ffffff;
  --clr-border:      #d8dfe9;
  --clr-border-2:    #c5ceda;

  --clr-text:        #111827;
  --clr-text-2:      #4b5a72;
  --clr-text-3:      #7a8a9e;

  --clr-accent:      #2563eb;
  --clr-accent-2:    #1d4ed8;
  --clr-accent-glow: rgba(37, 99, 235, 0.12);

  --clr-success:     #059669;
  --clr-warning:     #d97706;
  --clr-tag-bg:      rgba(37, 99, 235, 0.08);

  --shadow-card: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-hover: 0 6px 32px rgba(0,0,0,0.14);
}

/* ══════════════════════════════════════════════
   3. RESET & BASE
   ══════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  transition: background-color var(--tr-slow), color var(--tr-slow);
  min-height: 100vh;
  overflow-x: hidden;
}

img, svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--clr-accent);
  text-decoration: none;
  transition: color var(--tr), opacity var(--tr);
}

a:hover { color: var(--clr-accent-2); }

ul, ol { list-style: none; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  line-height: 1.2;
  color: var(--clr-text);
}

/* Focus visibile per accessibilità */
:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ══════════════════════════════════════════════
   4. LAYOUT HELPERS
   ══════════════════════════════════════════════ */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

.section {
  padding-block: var(--sp-24);
}

.section--alt {
  background-color: var(--clr-bg-2);
}

.section__header {
  margin-bottom: var(--sp-12);
}

.section__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  display: block;
  margin-bottom: var(--sp-3);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: var(--sp-4);
}

.section__subtitle {
  font-size: 1.125rem;
  color: var(--clr-text-2);
  max-width: 680px;
  font-weight: 300;
}

/* ══════════════════════════════════════════════
   5. NAVIGAZIONE
   ══════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--tr-slow), border-color var(--tr-slow);
}

/* Riga sottile accent sotto la navbar */
.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-accent);
  transition: width 0.6s ease;
}

.site-header.scrolled::after { width: 100%; }

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  width: 40px;
  height: 40px;
}

.nav__logouni-unibg {
  display: flex;
  align-items: center;
  width: 250px;
  height: 80px;
}

.logo-link img {
  display: block;
  margin: 0 auto;
}

/* Placeholder SVG logo */
.logo-placeholder {
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  background: var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  color: #fff;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--clr-text);
  letter-spacing: -0.02em;
}

.nav__logo-text span {
  color: var(--clr-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.nav__link {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-sm);
  transition: color var(--tr), background-color var(--tr);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link.active {
  color: var(--clr-text);
  background-color: var(--clr-surface);
}

.nav__link.active {
  color: var(--clr-accent);
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--clr-border);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--clr-text-2);
  cursor: pointer;
  transition: all var(--tr);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
}

.btn-icon:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-glow);
}

/* Menu mobile */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-2);
  border-radius: var(--r-sm);
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: all var(--tr);
}

/* ══════════════════════════════════════════════
   6. BOTTONI
   ══════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.625rem var(--sp-6);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all var(--tr);
  letter-spacing: 0.02em;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--clr-accent-2);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--clr-accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--clr-text);
  border: 1px solid var(--clr-border-2);
}

.btn--outline:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-glow);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--clr-text-2);
  padding: 0.5rem var(--sp-3);
  font-size: 0.8125rem;
}

.btn--ghost:hover {
  color: var(--clr-accent);
  background: var(--clr-accent-glow);
}

/* ══════════════════════════════════════════════
   7. CARDS
   ══════════════════════════════════════════════ */
.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: border-color var(--tr), box-shadow var(--tr), transform var(--tr);
}

.card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* ══════════════════════════════════════════════
   8. HOMEPAGE — HERO
   ══════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block: var(--sp-24);
}

/* Griglia decorativa di sfondo */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  pointer-events: none;
}

/* Alone luce accent */
.hero__glow {
  position: absolute;
  top: 10%;
  right: -10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--clr-accent-glow) 0%, transparent 65%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: var(--clr-tag-bg);
  border: 1px solid rgba(79,142,247,0.25);
  padding: var(--sp-2) var(--sp-4);
  border-radius: 100px;
  margin-bottom: var(--sp-8);
  animation: fadeInUp 0.6s ease both;
}

.hero__tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
  animation: pulse 2s ease infinite;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--clr-text);
  margin-bottom: var(--sp-3);
  animation: fadeInUp 0.6s 0.1s ease both;
}

.hero__title-accent { color: var(--clr-accent); }

.hero__subtitle {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  font-weight: 400;
  color: var(--clr-text-2);
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-6);
  animation: fadeInUp 0.6s 0.2s ease both;
}

.hero__desc {
  font-size: 1.125rem;
  color: var(--clr-text-2);
  font-weight: 300;
  max-width: 620px;
  margin-bottom: var(--sp-8);
  animation: fadeInUp 0.6s 0.3s ease both;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
  animation: fadeInUp 0.6s 0.4s ease both;
}

/* ══════════════════════════════════════════════
   9. HOMEPAGE — STATISTICHE
   ══════════════════════════════════════════════ */
.stats {
  padding-block: var(--sp-16);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-8);
}

.stat__number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--clr-accent);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--sp-1);
}

.stat__label {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ══════════════════════════════════════════════
   10. HOMEPAGE — ABOUT
   ══════════════════════════════════════════════ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}

.about__visual {
  position: relative;
}

.about__diagram {
  width: 100%;
  aspect-ratio: 1;
  max-width: 440px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about__diagram-inner {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--clr-accent-glow);
  border: 2px solid var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--clr-accent);
  z-index: 1;
}

.about__diagram-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--clr-border);
}

.about__diagram-ring:nth-child(1) { width: 220px; height: 220px; }
.about__diagram-ring:nth-child(2) { width: 300px; height: 300px; opacity: 0.6; }
.about__diagram-ring:nth-child(3) { width: 380px; height: 380px; opacity: 0.3; }

.about__text p + p { margin-top: var(--sp-4); }

/* ══════════════════════════════════════════════
   11. HOMEPAGE — AREE DI RICERCA
   ══════════════════════════════════════════════ */
.areas__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
}

.area-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: all var(--tr);
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
}

.area-card:hover {
  border-color: var(--clr-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.area-card__icon {
  width: 42px;
  height: 42px;
  border-radius: var(--r-sm);
  background: var(--clr-tag-bg);
  border: 1px solid rgba(79,142,247,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.area-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: var(--sp-2);
}

.area-card__desc {
  font-size: 0.9rem;
  color: var(--clr-text-2);
  line-height: 1.6;
}

/* ══════════════════════════════════════════════
   12. HOMEPAGE — NEWS
   ══════════════════════════════════════════════ */
.news__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.news-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: all var(--tr);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.news-card__date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-accent);
  margin-bottom: var(--sp-3);
  letter-spacing: 0.04em;
}

.news-card__title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--sp-3);
  line-height: 1.35;
}

.news-card__desc {
  font-size: 0.9rem;
  color: var(--clr-text-2);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--sp-4);
}

.news-card__link {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
}

/* ══════════════════════════════════════════════
   13. PAGINA PEOPLE
   ══════════════════════════════════════════════ */
.people-section { margin-bottom: var(--sp-16); }

.people-section__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--clr-border);
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--sp-6);
}

.person-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  transition: all var(--tr);
  text-align: center;
}

.person-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.person-card--featured {
  grid-column: span 2;
  display: flex;
  gap: var(--sp-8);
  text-align: left;
  align-items: flex-start;
}

.person-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--clr-bg-3);
  border: 2px solid var(--clr-border);
  margin: 0 auto var(--sp-4);
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--clr-accent);
}

.person-card--featured .person-card__avatar {
  width: 100px;
  height: 100px;
  font-size: 2rem;
  margin: 0;
}

.person-card__info { flex: 1; }

.person-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: var(--sp-1);
}

.person-card__role {
  font-size: 0.8125rem;
  color: var(--clr-accent);
  font-family: var(--font-mono);
  margin-bottom: var(--sp-3);
  letter-spacing: 0.02em;
}

.person-card__bio {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  line-height: 1.6;
  margin-bottom: var(--sp-3);
}

.person-card__interests {
  font-size: 0.8rem;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-4);
}

.person-card__interests strong {
  color: var(--clr-text-2);
  font-family: var(--font-display);
  font-weight: 600;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--clr-tag-bg);
  color: var(--clr-accent);
  border: 1px solid rgba(79,142,247,0.2);
  white-space: nowrap;
}

.person-card__links {
  display: flex;
  gap: var(--sp-2);
  justify-content: center;
  margin-top: var(--sp-3);
}

.person-card--featured .person-card__links { justify-content: flex-start; }

/* ══════════════════════════════════════════════
   14. PAGINA RESEARCH
   ══════════════════════════════════════════════ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--sp-6);
}

.research-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-8);
  transition: all var(--tr);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  position: relative;
  overflow: hidden;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--clr-accent);
  transform: scaleX(0);
  transition: transform var(--tr);
  transform-origin: left;
}

.research-card:hover::before { transform: scaleX(1); }

.research-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.research-card__icon {
  font-size: 1.75rem;
}

.research-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.research-card__desc {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.65;
  flex: 1;
}

.research-card__link {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  margin-top: auto;
}

/* ══════════════════════════════════════════════
   15. PAGINA PUBLICATIONS
   ══════════════════════════════════════════════ */
.pub-filters {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-4);
}

.filter-btn {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: var(--sp-2) var(--sp-4);
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  background: transparent;
  color: var(--clr-text-2);
  cursor: pointer;
  transition: all var(--tr);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
}

.pub-search {
  margin-bottom: var(--sp-8);
}

.search-input {
  width: 100%;
  max-width: 500px;
  padding: var(--sp-3) var(--sp-4);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-sm);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color var(--tr);
}

.search-input::placeholder { color: var(--clr-text-3); }
.search-input:focus {
  outline: none;
  border-color: var(--clr-accent);
}

.pub-year-group { margin-bottom: var(--sp-12); }

.pub-year-label {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--clr-border);
}

.pub-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-6);
  margin-bottom: var(--sp-4);
  transition: all var(--tr);
  display: flex;
  gap: var(--sp-6);
  align-items: flex-start;
}

.pub-item:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-card);
}

.pub-item__type {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 3px;
}

.pub-item__type--journal {
  background: rgba(62, 207, 142, 0.12);
  color: var(--clr-success);
  border: 1px solid rgba(62,207,142,0.25);
}

.pub-item__type--conference {
  background: var(--clr-tag-bg);
  color: var(--clr-accent);
  border: 1px solid rgba(79,142,247,0.25);
}

.pub-item__type--workshop {
  background: rgba(245,166,35,0.1);
  color: var(--clr-warning);
  border: 1px solid rgba(245,166,35,0.25);
}

.pub-item__content { flex: 1; }

.pub-item__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: var(--sp-2);
  line-height: 1.35;
}

.pub-item__authors {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  margin-bottom: var(--sp-2);
}

.pub-item__venue {
  font-size: 0.8125rem;
  color: var(--clr-text-3);
  font-style: italic;
  margin-bottom: var(--sp-3);
}

.pub-item__links {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

/* ══════════════════════════════════════════════
   16. PAGINA TESI
   ══════════════════════════════════════════════ */
.thesis-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
}

.thesis-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-8);
  transition: all var(--tr);
  display: flex;
  gap: var(--sp-8);
  align-items: flex-start;
}

.thesis-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-hover);
}

.thesis-card--taken {
  opacity: 0.6;
  pointer-events: none;
}

.thesis-card__meta {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  flex-shrink: 0;
  min-width: 120px;
}

.thesis-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  text-align: center;
}

.thesis-badge--available {
  background: rgba(62,207,142,0.12);
  color: var(--clr-success);
  border: 1px solid rgba(62,207,142,0.25);
}

.thesis-badge--taken {
  background: var(--clr-bg-3);
  color: var(--clr-text-3);
  border: 1px solid var(--clr-border);
}

.thesis-level {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--clr-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.thesis-card__content { flex: 1; }

.thesis-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1875rem;
  margin-bottom: var(--sp-3);
  line-height: 1.35;
}

.thesis-card__desc {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.65;
  margin-bottom: var(--sp-4);
}

.thesis-card__supervisor {
  font-size: 0.875rem;
  color: var(--clr-text-2);
  margin-bottom: var(--sp-3);
}

.thesis-card__supervisor strong {
  color: var(--clr-text);
  font-family: var(--font-display);
  font-weight: 600;
}

/* Guidelines */
.guidelines {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-12);
}

.guidelines__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
}

.guidelines__rulef {
  display: flex;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
}

.guide-block__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--clr-border);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  counter-reset: step;
}

.guide-step {
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
  counter-increment: step;
}

.guide-step::before {
  content: counter(step);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--clr-tag-bg);
  border: 1px solid rgba(79,142,247,0.25);
  color: var(--clr-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.guide-step p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.6;
}

.guide-chapters {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.guide-chapter {
  display: flex;
  gap: var(--sp-3);
  font-size: 0.9rem;
  color: var(--clr-text-2);
  padding: var(--sp-3);
  border-radius: var(--r-sm);
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
}

.guide-chapter strong {
  color: var(--clr-text);
  font-family: var(--font-display);
  white-space: nowrap;
}

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: var(--sp-3); }

.faq-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-5) var(--sp-6);
  background: none;
  border: none;
  color: var(--clr-text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  text-align: left;
  gap: var(--sp-4);
  transition: color var(--tr);
}

.faq-item__question:hover { color: var(--clr-accent); }

.faq-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--tr);
  font-size: 0.9rem;
  line-height: 1;
}

.faq-item.open .faq-icon {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 var(--sp-6);
}

.faq-item.open .faq-item__answer {
  max-height: 200px;
  padding-bottom: var(--sp-5);
}

.faq-item__answer p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.65;
}

/* ══════════════════════════════════════════════
   17. PAGINA INTERNA RESEARCH (topic)
   ══════════════════════════════════════════════ */
.page-hero {
  padding-block: var(--sp-16) var(--sp-12);
  border-bottom: 1px solid var(--clr-border);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.2;
}

.page-hero__content { position: relative; z-index: 1; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--clr-text-3);
  margin-bottom: var(--sp-6);
}

.breadcrumb a { color: var(--clr-text-3); }
.breadcrumb a:hover { color: var(--clr-accent); }
.breadcrumb span { color: var(--clr-text); }

/* ══════════════════════════════════════════════
   18. FOOTER
   ══════════════════════════════════════════════ */
.site-footer {
  background: var(--clr-bg-2);
  border-top: 1px solid var(--clr-border);
  padding-block: var(--sp-16) var(--sp-8);
  margin-top: var(--sp-24);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--clr-text);
}

.footer__brand span { color: var(--clr-accent); }

.footer__desc {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  line-height: 1.6;
  margin-bottom: var(--sp-6);
}

.footer__col-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--clr-text);
  margin-bottom: var(--sp-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  transition: color var(--tr);
}

.footer__link:hover { color: var(--clr-accent); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--clr-border);
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--clr-text-3);
}

.footer__legal {
  display: flex;
  gap: var(--sp-4);
}

.footer__legal a {
  font-size: 0.8125rem;
  color: var(--clr-text-3);
}

/* ══════════════════════════════════════════════
   19. ANIMAZIONI
   ══════════════════════════════════════════════ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Animazione scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger per figli */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0.05s; }
.reveal-stagger.visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.12s; }
.reveal-stagger.visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.19s; }
.reveal-stagger.visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.26s; }
.reveal-stagger.visible > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.33s; }
.reveal-stagger.visible > *:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.40s; }

/* ══════════════════════════════════════════════
   20. RESPONSIVE
   ══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8);
  }

  .about__grid { gap: var(--sp-8); }
  .guidelines__grid { grid-template-columns: 1fr; gap: var(--sp-8); }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  .nav__links { display: none; }

  .nav__burger { display: flex; }

  /* Menu mobile overlay */
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: var(--clr-bg);
    border-top: 1px solid var(--clr-border);
    padding: var(--sp-8) var(--sp-6);
    gap: var(--sp-2);
    z-index: 99;
    animation: fadeInUp 0.25s ease;
  }

  .nav__link {
    font-size: 1.125rem;
    padding: var(--sp-3) var(--sp-4);
  }

  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }

  .areas__grid { grid-template-columns: 1fr; }

  .news__grid { grid-template-columns: 1fr; }

  .about__grid { grid-template-columns: 1fr; }

  .about__visual { display: none; }

  .person-card--featured {
    grid-column: span 1;
    flex-direction: column;
  }

  .footer__grid { grid-template-columns: 1fr; gap: var(--sp-8); }

  .thesis-card { flex-direction: column; gap: var(--sp-4); }

  .thesis-card__meta { flex-direction: row; flex-wrap: wrap; align-items: center; }

  .pub-item { flex-direction: column; gap: var(--sp-3); }
}

@media (max-width: 480px) {
  .container { padding-inline: var(--sp-4); }
  .section { padding-block: var(--sp-16); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .guidelines { padding: var(--sp-6); }
}

/* ══════════════════════════════════════════════
   21. UTILITÀ
   ══════════════════════════════════════════════ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.text-accent { color: var(--clr-accent); }
.text-muted  { color: var(--clr-text-2); }

.divider {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin-block: var(--sp-12);
}

/* Scrollbar personalizzata */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--clr-accent); }

/* Print */
@media print {
  .site-header, .site-footer, .nav__controls { display: none; }
  body { background: #fff; color: #000; }
}