/* =========================================================
   VizForBiz · Sito web · stylesheet condiviso
   Brand tokens + responsive web patterns
   ========================================================= */

:root {
  /* INK & PAPER */
  --ink:         #0B1B2E;
  --ink-soft:    #1A2740;
  --ink-line:    #2A3A55;
  --paper:       #F4F0E6;
  --bone:        #E6DFCC;
  --fog:         #C9C2AE;
  --slate:       #5A6470;
  --slate-soft:  #8A929D;
  --hairline:    rgba(11,27,46,0.12);
  --hairline-strong: rgba(11,27,46,0.2);

  /* ACCENT */
  --accent:      #E8512B;
  --accent-deep: #B83C1C;
  --accent-tint: #F6C9B8;

  /* DATA VIZ */
  --dv-1: #E8512B; --dv-2: #1F4E9D; --dv-3: #2E7D54;
  --dv-4: #D4A017; --dv-5: #6B3D7A; --dv-6: #2C7C8C;

  /* TYPE */
  --f-serif: 'IBM Plex Serif', Georgia, 'Times New Roman', serif;
  --f-sans:  'IBM Plex Sans', Helvetica, Arial, sans-serif;
  --f-mono:  'IBM Plex Mono', 'SF Mono', Menlo, monospace;

  /* SCALE */
  --t-mega:    clamp(56px, 11vw, 168px);
  --t-display: clamp(48px, 7vw, 110px);
  --t-h1:      clamp(36px, 5vw, 72px);
  --t-h2:      clamp(28px, 3vw, 48px);
  --t-h3:      clamp(20px, 1.6vw, 28px);
  --t-lede:    clamp(18px, 1.4vw, 22px);
  --t-body:    16px;
  --t-small:   13px;
  --t-micro:   11px;

  /* LAYOUT */
  --container: 1320px;
  --side-pad:  clamp(20px, 4vw, 56px);
  --nav-h:     72px;
  --section-y: clamp(80px, 9vw, 140px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: var(--t-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: 0; background: none; padding: 0; color: inherit; }
a { color: inherit; text-decoration: none; transition: color 0.18s; }
p { margin: 0 0 1em; max-width: 62ch; text-wrap: pretty; }

h1, h2, h3, h4 {
  font-family: var(--f-serif);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin: 0 0 0.4em;
  text-wrap: balance;
}

/* ============================== CONTAINER */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--side-pad);
}

/* ============================== NAVIGATION */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(244,240,230,0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}
.site-nav.dark {
  background: rgba(11,27,46,0.86);
  border-bottom-color: var(--ink-line);
  color: var(--paper);
}
.site-nav .container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-nav .brand-mark {
  font-family: var(--f-sans);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.035em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
}
.site-nav .brand-mark .dot {
  display: inline-block;
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
  margin: 0 3px;
  vertical-align: 0.18em;
}
.site-nav-links {
  display: flex;
  gap: 28px;
  font-family: var(--f-sans);
  font-size: 14px;
  font-weight: 500;
}
.site-nav-links a { color: var(--slate); }
.site-nav-links a:hover, .site-nav-links a.active { color: var(--ink); }
.site-nav.dark .site-nav-links a { color: var(--fog); }
.site-nav.dark .site-nav-links a:hover { color: var(--paper); }
.site-nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.02em;
  border-radius: 0;
  transition: background 0.18s;
}
.site-nav-cta:hover { background: var(--accent); color: var(--paper); }
.site-nav.dark .site-nav-cta { background: var(--accent); }
.site-nav.dark .site-nav-cta:hover { background: var(--accent-deep); }

/* Hamburger button — hidden on desktop */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px;
}
.nav-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  transition: transform 0.25s, opacity 0.25s;
}
.site-nav.dark .nav-burger span { background: var(--paper); }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 880px) {
  .nav-burger { display: flex; }
  .site-nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--hairline);
    padding: 8px 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: max-height 0.3s ease, opacity 0.2s ease;
    box-shadow: 0 18px 40px rgba(11,27,46,0.12);
  }
  .site-nav.dark .site-nav-links { background: var(--ink); border-bottom-color: var(--ink-line); }
  .site-nav-links.open {
    max-height: 80vh;
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav-links a {
    padding: 16px var(--side-pad);
    font-size: 17px;
    border-bottom: 1px solid var(--hairline);
  }
  .site-nav.dark .site-nav-links a { border-bottom-color: var(--ink-line); }
  .site-nav-links a:last-child { border-bottom: none; }
}

/* ============================== UTILS */
.mono { font-family: var(--f-mono); }
.serif { font-family: var(--f-serif); }
.italic { font-style: italic; }
.muted { color: var(--slate); }
.accent-text { color: var(--accent); }
.eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  display: inline-block;
}
.eyebrow.on-dark { color: var(--accent); }
.eyebrow.muted { color: var(--slate-soft); }

/* ============================== SECTION */
section { padding: var(--section-y) 0; position: relative; }
section.dark { background: var(--ink); color: var(--paper); }
section.dark h1, section.dark h2, section.dark h3, section.dark h4 { color: var(--paper); }
section.dark .muted { color: var(--fog); }
section.accent-bg { background: var(--accent); color: var(--paper); }
section.accent-bg h2, section.accent-bg h3 { color: var(--paper); }
section.bone-bg { background: var(--bone); }

.section-divider {
  height: 1px;
  background: var(--hairline);
  margin: 0 auto;
  max-width: var(--container);
}
section.dark + section.dark .section-divider,
section.dark .section-divider { background: var(--ink-line); }

/* ============================== HERO PRIMITIVES */
.hero-eyebrow {
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

/* ============================== BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  font-family: var(--f-sans);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.02em;
  border: 1px solid currentColor;
  background: transparent;
  color: var(--ink);
  transition: background 0.18s, color 0.18s, border-color 0.18s, transform 0.18s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: var(--paper);
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn-dark {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-dark:hover { background: var(--accent); border-color: var(--accent); }
.btn-ghost {
  background: transparent;
  color: currentColor;
  border-color: currentColor;
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
section.dark .btn-ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ============================== CARDS */
.card {
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--ink); }
.card.dark { background: var(--ink); color: var(--paper); border-color: var(--ink-line); }
.card.dark:hover { border-color: var(--accent); }

.card-tag {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.card h3 {
  font-family: var(--f-serif);
  font-size: 24px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}
.card p { color: var(--slate); margin: 0; font-size: 15px; line-height: 1.55; }
.card.dark p { color: var(--fog); }
.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}
.card.dark .card-meta { color: var(--fog); border-top-color: var(--ink-line); }

/* ============================== GRID */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 24px; }
.grid-2 > *, .grid-3 > *, .grid-4 > *, .grid-12 > * { min-width: 0; }

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-12 { grid-template-columns: repeat(2, 1fr); }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9, .span-12 { grid-column: span 2; }
}

/* ============================== FOOTER */
.site-foot {
  background: var(--ink);
  color: var(--paper);
  padding: 96px var(--side-pad) 40px;
}
.site-foot-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.site-foot-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--ink-line);
}
.site-foot-top > * { min-width: 0; }
.site-foot h5 {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog);
  margin: 0 0 16px;
  font-weight: 400;
}
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { font-family: var(--f-sans); font-size: 14px; color: var(--paper); line-height: 2; }
.site-foot li a { color: var(--paper); }
.site-foot li a:hover { color: var(--accent); }
.site-foot .brand-block .brand-name {
  font-family: var(--f-sans);
  font-weight: 700;
  font-size: 36px;
  letter-spacing: -0.035em;
  display: inline-block;
}
.site-foot .brand-block .brand-name .dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  margin: 0 3px;
  vertical-align: 0.3em;
}
.site-foot .brand-block p {
  font-family: var(--f-serif);
  font-style: italic;
  font-size: 18px;
  color: var(--fog);
  max-width: 36ch;
  margin: 20px 0 0;
  line-height: 1.4;
}
.site-foot-bottom {
  display: flex;
  justify-content: space-between;
  margin-top: 28px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fog);
}
@media (max-width: 800px) {
  .site-foot-top { grid-template-columns: 1fr 1fr; }
  .site-foot .brand-block { grid-column: span 2; }
  .site-foot-bottom { flex-direction: column; gap: 8px; }
}

/* ============================== NEWSLETTER BOX */
.nl-box {
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.nl-box.dark { background: var(--ink-soft); border-color: var(--ink-line); color: var(--paper); }
.nl-box.accent { background: var(--accent); color: var(--paper); border: none; }
.nl-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.nl-form input {
  flex: 1;
  min-width: 220px;
  padding: 14px 18px;
  font-family: var(--f-sans);
  font-size: 14px;
  background: transparent;
  border: 1px solid currentColor;
  color: inherit;
  outline: none;
}
.nl-form input::placeholder { color: currentColor; opacity: 0.5; }
.nl-form input:focus { border-color: var(--accent); }

/* ============================== TAG */
.tag {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--hairline);
  color: var(--slate);
}
.tag.accent { color: var(--accent); border-color: var(--accent); }
.tag.dark { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ============================== EVENT ROW */
.event-row {
  display: grid;
  grid-template-columns: 100px 1fr 180px 140px;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: center;
}
.event-row:last-child { border-bottom: none; }
.event-date {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
  line-height: 1.3;
}
.event-date strong {
  display: block;
  font-family: var(--f-serif);
  font-size: 40px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.02em;
}
section.dark .event-date strong { color: var(--paper); }
.event-title h3 {
  font-family: var(--f-serif);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 4px;
}
.event-title p { font-size: 14px; color: var(--slate); margin: 0; }
section.dark .event-title p { color: var(--fog); }
.event-meta {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.5;
}
section.dark .event-meta { color: var(--fog); }

@media (max-width: 800px) {
  .event-row { grid-template-columns: 1fr; gap: 12px; padding: 24px 0; }
}

/* ============================== INTERACTIVE CHART TOGGLE */
.chart-flip {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 32px;
}
.chart-flip-controls {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border: 1px solid var(--hairline);
  width: fit-content;
}
.chart-flip-controls button {
  padding: 10px 20px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
  background: transparent;
  transition: background 0.18s, color 0.18s;
}
.chart-flip-controls button.active {
  background: var(--ink);
  color: var(--paper);
}
.chart-flip-stage {
  position: relative;
  aspect-ratio: 16/9;
}
.chart-flip-stage > svg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0;
  transition: opacity 0.4s;
}
.chart-flip-stage > svg.active { opacity: 1; }
.chart-flip h3 {
  font-family: var(--f-serif);
  font-size: 28px;
  font-weight: 500;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.chart-flip .caption {
  margin-top: 16px;
  font-family: var(--f-serif);
  font-style: italic;
  color: var(--slate);
  font-size: 15px;
  max-width: 60ch;
}

/* ============================== STAT */
.stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px 0;
}
.stat .stat-num {
  font-family: var(--f-mono);
  font-size: clamp(48px, 6vw, 84px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--accent);
}
.stat .stat-label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate);
}
section.dark .stat .stat-label { color: var(--fog); }
.stat p {
  font-family: var(--f-serif);
  font-size: 17px;
  color: var(--ink);
  margin: 6px 0 0;
}
section.dark .stat p { color: var(--paper); }

/* ============================== ANIMATIONS */
@keyframes drawLine {
  from { stroke-dashoffset: 1000; }
  to { stroke-dashoffset: 0; }
}
@keyframes growBar {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  animation: fadeUp 0.7s ease-out forwards;
}
.fade-up.d1 { animation-delay: 0.1s; }
.fade-up.d2 { animation-delay: 0.2s; }
.fade-up.d3 { animation-delay: 0.3s; }
.fade-up.d4 { animation-delay: 0.4s; }

@media (max-width: 900px) {
  .reviews-3col { grid-template-columns: 1fr !important; }
}