:root {
  --ink: oklch(0.22 0.03 250);
  --paper: oklch(0.98 0.008 85);
  --institution: oklch(0.38 0.12 250);
  --institution-foreground: oklch(0.99 0 0);
  --accent-violet: oklch(0.55 0.16 295);
  --signal-high: oklch(0.62 0.14 45);
  --muted: oklch(0.48 0.02 250);
  --border: oklch(0.9 0.01 85);
  --card: oklch(1 0.004 85);
  --radius: 0.75rem;
  --page-max: 72rem;
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100svh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

.font-data {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 15% -10%, oklch(0.55 0.16 295 / 14%), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%, oklch(0.38 0.12 250 / 12%), transparent 50%);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  color: var(--institution);
}

.brand-wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.125rem;
  line-height: 1;
}

.brand-appalti {
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.brand-watch {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--institution);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
}

.lang-btn {
  border: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  color: var(--muted);
  transition: color 0.15s, background 0.15s;
}

.lang-btn.is-active {
  background: var(--institution);
  color: var(--institution-foreground);
}

.lang-sep {
  color: var(--border);
  font-size: 0.75rem;
  user-select: none;
}

.hero {
  display: grid;
  gap: 3rem;
  align-items: center;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: 1.05fr 0.95fr;
    padding-top: 3rem;
    padding-bottom: 5rem;
  }
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  color: var(--muted);
}

.beta-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--institution);
  background: oklch(0.38 0.12 250 / 10%);
  border: 1px solid oklch(0.38 0.12 250 / 18%);
}

.hero-title {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2.125rem, 5.5vw, 3.25rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-lead {
  margin: 0 0 2rem;
  max-width: 38rem;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--muted);
}

.hero-lead strong {
  color: var(--ink);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.875rem;
}

.hero-note {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.hero-note code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
  background: oklch(0.38 0.12 250 / 8%);
  color: var(--institution);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.35rem;
  border-radius: calc(var(--radius) * 1.1);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn svg {
  width: 1.125rem;
  height: 1.125rem;
}

.btn-primary {
  color: var(--institution-foreground);
  background: var(--institution);
  box-shadow: 0 1px 2px oklch(0.22 0.03 250 / 12%), 0 8px 24px oklch(0.38 0.12 250 / 22%);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px oklch(0.22 0.03 250 / 14%), 0 12px 32px oklch(0.38 0.12 250 / 28%);
}

.btn-lg {
  padding: 0.95rem 1.5rem;
  font-size: 1rem;
  white-space: nowrap;
}

.hero-visual {
  position: relative;
  min-height: 22rem;
}

.preview-card {
  position: absolute;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.2);
  background: var(--card);
  box-shadow: 0 12px 40px oklch(0.22 0.03 250 / 8%);
}

.preview-card--main {
  inset: 0 8% 18% 0;
  padding: 1.25rem 1.35rem;
}

.preview-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.preview-stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--institution);
  line-height: 1.2;
}

.preview-stat-caption {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--muted);
}

.preview-bars {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  height: 5.5rem;
  margin-top: 1.25rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.preview-bars span {
  flex: 1;
  height: var(--h);
  border-radius: 0.35rem 0.35rem 0.1rem 0.1rem;
  background: linear-gradient(180deg, oklch(0.55 0.1 250 / 55%), oklch(0.38 0.12 250 / 85%));
}

.preview-card--signal {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  right: 0;
  bottom: 38%;
  width: min(16rem, 72%);
  padding: 0.875rem 1rem;
  animation: float 6s ease-in-out infinite;
}

.signal-dot {
  width: 0.5rem;
  height: 0.5rem;
  margin-top: 0.35rem;
  border-radius: 50%;
  background: var(--signal-high);
  box-shadow: 0 0 0 4px oklch(0.62 0.14 45 / 18%);
  flex-shrink: 0;
}

.preview-signal-title {
  margin: 0;
  font-size: 0.6875rem;
  color: var(--institution);
}

.preview-signal-body {
  margin: 0.2rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.45;
}

.preview-card--map {
  left: 6%;
  bottom: 0;
  width: 9.5rem;
  height: 9.5rem;
  display: grid;
  place-items: center;
  animation: float 7s ease-in-out infinite reverse;
}

.italy-outline {
  width: 4.75rem;
  height: 5.5rem;
  color: var(--institution);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@media (max-width: 600px) {
  .hero {
    gap: 2rem;
  }

  .hero-visual {
    min-height: 19rem;
    margin: 0 auto;
    width: 100%;
    max-width: 26rem;
  }

  .preview-card--signal {
    width: min(15rem, 80%);
  }

  .preview-card--map {
    width: 8rem;
    height: 8rem;
  }
}

@media (max-width: 360px) {
  .hero-cta .btn-primary {
    width: 100%;
  }
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--muted);
}

.features,
.steps {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.feature-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.feature-card {
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.2);
  background: var(--card);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.feature-card:hover {
  border-color: oklch(0.38 0.12 250 / 25%);
  box-shadow: 0 8px 28px oklch(0.22 0.03 250 / 6%);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1rem;
  border-radius: 0.65rem;
  color: var(--institution);
  background: oklch(0.38 0.12 250 / 10%);
}

.feature-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--muted);
}

.steps-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .steps-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.step {
  display: flex;
  gap: 1rem;
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.2);
  background: linear-gradient(180deg, var(--card), oklch(0.98 0.008 85 / 60%));
}

.step-num {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--institution);
  opacity: 0.7;
}

.step h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 600;
}

.step p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
}

.cta-band {
  max-width: var(--page-max);
  margin: 0 auto 4rem;
  padding: 0 1.5rem;
}

.cta-band-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem 1.75rem;
  border-radius: calc(var(--radius) * 1.5);
  border: 1px solid oklch(0.38 0.12 250 / 20%);
  background: linear-gradient(135deg, oklch(0.38 0.12 250 / 10%), oklch(0.55 0.16 295 / 8%));
}

@media (min-width: 768px) {
  .cta-band-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 2.25rem 2rem;
  }
}

.cta-band-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.cta-band-lead {
  margin: 0;
  max-width: 32rem;
  font-size: 0.9375rem;
  color: var(--muted);
}

.site-footer {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid var(--border);
}

.footer-disclaimer {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink);
}

.footer-attribution {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Stats band ─────────────────────────────── */
.stats {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 1.5rem 1rem;
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.2);
  background: var(--border);
}

@media (min-width: 768px) {
  .stats-inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1.5rem 1rem;
  text-align: center;
  background: var(--card);
}

.stat-value {
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 500;
  line-height: 1;
  color: var(--institution);
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Signals explained ──────────────────────── */
.signals {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.signal-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .signal-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .signal-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.signal-item {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.2);
  background: var(--card);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.signal-item:hover {
  border-color: oklch(0.62 0.14 45 / 35%);
  box-shadow: 0 8px 28px oklch(0.22 0.03 250 / 6%);
}

.signal-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--signal-high);
  background: oklch(0.62 0.14 45 / 12%);
}

.signal-item h3 {
  margin: 0 0 0.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.signal-item p {
  margin: 0;
  font-size: 0.8438rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ── FAQ ────────────────────────────────────── */
.faq {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.1);
  background: var(--card);
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--institution);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  margin: 0;
  padding: 0 1.25rem 1.1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--muted);
}

.faq-item p code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
  background: oklch(0.38 0.12 250 / 8%);
  color: var(--institution);
}

/* ── Enhanced footer ────────────────────────── */
.footer-top {
  display: grid;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
  }
}

.footer-tagline {
  margin: 0.875rem 0 0;
  max-width: 24rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col-title {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-col a {
  font-size: 0.875rem;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--institution);
}

.is-hidden {
  display: none !important;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}