/* =============================================
   XIRVEX — Analisi e Pianificazione Strategica
   CSS principale
   ============================================= */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@700;800&display=swap');

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:        #f5f4f1;
  --color-surface:   #ffffff;
  --color-ink:       #1a1a1a;
  --color-ink-muted: #5a5a5a;
  --color-accent:    #1d3557;
  --color-accent-light: #e8edf4;
  --color-border:    #dcdbd7;
  --color-rule:      #c8c6c0;

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --max-w: 1320px;
  --radius: 4px;
  --transition: 0.22s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

/* ---- Container ---- */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 40px;
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(245, 244, 241, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.5px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.main-nav a:hover {
  color: var(--color-accent);
}

.main-nav a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  transition: var(--transition);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 16px 0;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  padding: 12px 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a:hover {
  background: var(--color-accent-light);
}

/* =============================================
   HERO
   ============================================= */
.hero {
  padding-top: 68px;
  background: var(--color-accent);
  color: #fff;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 580px;
}

.hero-content {
  padding: 80px 60px 80px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.hero-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
}

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  max-width: 480px;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: #fff;
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background var(--transition), transform var(--transition);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition);
}

.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
}

.hero-image {
  position: relative;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* =============================================
   SECTION BASE
   ============================================= */
section {
  padding-block: 96px;
}

.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-ink);
  max-width: 640px;
}

.section-title.center {
  text-align: center;
  margin-inline: auto;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-ink-muted);
  line-height: 1.7;
  max-width: 600px;
  margin-top: 16px;
}

.section-desc.center {
  text-align: center;
  margin-inline: auto;
}

.section-head {
  margin-bottom: 56px;
}

/* =============================================
   INTRO STATS STRIP
   ============================================= */
.stats-strip {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: 40px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  divide-x: 1px solid var(--color-border);
}

.stat-item {
  padding: 16px 32px;
  border-right: 1px solid var(--color-border);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  margin-top: 6px;
  line-height: 1.4;
}

/* =============================================
   TWO-COLUMN TEXT + IMAGE SECTIONS
   ============================================= */
.split-section {
  background: var(--color-bg);
}

.split-section.alt {
  background: var(--color-surface);
}

.split-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.split-inner.reverse {
  direction: rtl;
}

.split-inner.reverse > * {
  direction: ltr;
}

.split-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.split-text p {
  font-size: 0.975rem;
  color: var(--color-ink-muted);
  line-height: 1.75;
}

.split-text ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

.split-text ul li {
  font-size: 0.95rem;
  color: var(--color-ink-muted);
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.split-text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.split-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.10);
}

.split-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.split-image:hover img {
  transform: scale(1.02);
}

.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 4px;
  transition: gap var(--transition);
}

.inline-link:hover {
  gap: 10px;
}

.inline-link svg {
  width: 14px;
  height: 14px;
}

/* =============================================
   CARDS GRID — knowledge modules
   ============================================= */
.cards-section {
  background: var(--color-accent);
}

.cards-section .section-title,
.cards-section .section-label {
  color: #fff;
}

.cards-section .section-desc {
  color: rgba(255,255,255,0.7);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform var(--transition), background var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.12);
}

.card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.12);
  border-radius: var(--radius);
}

.card-icon svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-top: 4px;
  transition: gap var(--transition), color var(--transition);
}

.card-link:hover {
  gap: 10px;
  color: #fff;
}

.card-link svg {
  width: 12px;
  height: 12px;
}

/* Light variant cards */
.cards-grid.light .card {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.cards-grid.light .card:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
}

.cards-grid.light .card h3 {
  color: var(--color-ink);
}

.cards-grid.light .card p {
  color: var(--color-ink-muted);
}

.cards-grid.light .card-link {
  color: var(--color-accent);
}

.cards-grid.light .card-icon {
  background: var(--color-accent-light);
}

.cards-grid.light .card-icon svg {
  stroke: var(--color-accent);
}

/* =============================================
   MODEL TABLE
   ============================================= */
.table-section {
  background: var(--color-surface);
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-top: 48px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead {
  background: var(--color-accent);
  color: #fff;
}

thead th {
  padding: 16px 24px;
  text-align: left;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

tbody tr:last-child {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--color-accent-light);
}

tbody td {
  padding: 16px 24px;
  color: var(--color-ink);
  vertical-align: top;
  line-height: 1.55;
}

tbody td:first-child {
  font-weight: 600;
  color: var(--color-accent);
}

/* =============================================
   TIMELINE
   ============================================= */
.timeline-section {
  background: var(--color-bg);
}

.timeline {
  position: relative;
  margin-top: 56px;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
  padding-left: 40px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-year {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.timeline-item h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.9rem;
  color: var(--color-ink-muted);
  line-height: 1.7;
  max-width: 680px;
}

/* =============================================
   DISCLAIMER / LIMITAZIONI
   ============================================= */
.disclaimer-section {
  background: var(--color-accent-light);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding-block: 64px;
}

.disclaimer-box {
  border: 1px solid var(--color-accent);
  border-left: 4px solid var(--color-accent);
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 40px 48px;
}

.disclaimer-box h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.disclaimer-box p {
  font-size: 0.92rem;
  color: var(--color-ink-muted);
  line-height: 1.75;
  margin-bottom: 12px;
}

.disclaimer-box p:last-child {
  margin-bottom: 0;
}

/* =============================================
   CONTACTS
   ============================================= */
.contacts-section {
  background: var(--color-surface);
}

.contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  margin-top: 56px;
}

.contacts-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-item .label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.contact-item .value {
  font-size: 1rem;
  color: var(--color-ink);
}

.contact-item .value a {
  color: var(--color-ink);
  transition: color var(--transition);
}

.contact-item .value a:hover {
  color: var(--color-accent);
}

.contacts-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.10);
}

.contacts-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.65);
  padding-block: 64px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: #fff;
  font-size: 1.4rem;
  margin-bottom: 16px;
  display: block;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.65;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}

.footer-col ul a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .container {
    padding-inline: 32px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-image {
    height: 320px;
  }

  .hero-content {
    padding: 60px 0;
  }

  .split-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .split-inner.reverse {
    direction: ltr;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .stat-item:nth-child(3) {
    border-right: 1px solid var(--color-border);
  }

  .contacts-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .container {
    padding-inline: 20px;
  }

  section {
    padding-block: 64px;
  }

  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

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

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

  .stat-item:nth-child(3) {
    border-right: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero-content {
    padding: 48px 0;
  }

  .disclaimer-box {
    padding: 28px 24px;
  }
}

@media (max-width: 480px) {
  .stat-item {
    padding: 16px 20px;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: flex-start;
  }
}