/* reasoonai — prototype landing page styles */

/* ---------------------------------------------------------------------------
   Font self-hostati. File .woff2 in website/fonts/. Comfortaa e Inter sono
   font variabili: un solo file per famiglia copre tutti i pesi usati
   (Comfortaa 500/600/700, Inter 400/500/600/700). Le unicode-range separano
   "latin" (contenuti attuali) da "latin-ext" (scaricato dal browser solo se
   compare un carattere che lo richiede). Nessuna richiesta di rete verso
   CDN esterni per i caratteri.
   --------------------------------------------------------------------------- */
@font-face {
  font-family: "Comfortaa";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("fonts/comfortaa-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Comfortaa";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("fonts/comfortaa-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------------------------------------------------------------------------
   Avviso per browser preistorici senza CSS custom properties (Internet
   Explorer 11 e precedenti). Quei browser ignorano @supports, quindi non
   applicano il display:none e vedono la barra; tutti i browser reali la
   nascondono. Stili con valori letterali: nessun var() qui.
   --------------------------------------------------------------------------- */
.legacy-banner {
  display: block;
  margin: 0;
  padding: 14px 20px;
  background: #10132b;
  color: #ffffff;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}
.legacy-banner a { color: #2cc6fa; }
@supports (--reasoonai: 0) {
  .legacy-banner { display: none; }
}

:root {
  --bg: #03040f;
  --surface: #0a0c1e;
  --surface-2: #10132b;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #ffffff;
  --text-dim: rgba(255, 255, 255, 0.68);
  --text-faint: rgba(255, 255, 255, 0.44);
  --cyan: #2cc6fa;
  --blue: #4d6cfa;
  --fuchsia: #c81fd6;
  --gradient: linear-gradient(120deg, var(--cyan) 0%, var(--blue) 55%, var(--fuchsia) 100%);
  --radius: 16px;
  --max-width: 1180px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Compensa l'header sticky (~92px): le sezioni raggiunte dai link del menu
     si fermano sotto l'header invece di finirci dietro. */
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "Comfortaa", "Inter", sans-serif;
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
}

p {
  margin: 0;
}

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

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  color: var(--cyan); /* fallback visibile se background-clip:text non si applica */
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (forced-colors: active) {
  /* Windows "contrasto elevato": niente testo invisibile, usa il colore di sistema */
  .gradient-text {
    -webkit-text-fill-color: currentColor;
  }
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 600;
  margin-bottom: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: #05060f;
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--cyan);
}

.btn-block {
  width: 100%;
}

/* Nav */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(3, 4, 15, 0.82);
  -webkit-backdrop-filter: blur(10px); /* Safari / iOS: richiede ancora il prefisso */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  height: 72px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-dim);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  border-top: none; /* prima sezione: nessun bordo sotto l'header */
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  bottom: auto;
  left: -10%;
  height: 520px;
  background: radial-gradient(60% 60% at 30% 20%, rgba(44, 198, 250, 0.16), transparent 70%),
              radial-gradient(50% 50% at 80% 30%, rgba(200, 31, 214, 0.14), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 860px;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}

.hero-lede {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 620px;
  margin-bottom: 18px;
}

.hero-slogan {
  font-size: 1rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-trust {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 0.85rem;
}

.hero-trust strong {
  color: var(--text);
  font-weight: 600;
}

/* Section shell */
section {
  padding: 88px 0;
  border-top: 1px solid var(--border);
}

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-dim);
  font-size: 1.02rem;
}

/* Hook banner */
.hook {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 56px 0;
}

.hook-inner {
  display: flex;
  gap: 40px;
  align-items: center;
  flex-wrap: wrap;
}

.hook-question {
  flex: 1 1 380px;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  font-family: "Comfortaa", sans-serif;
}

.hook-answer {
  flex: 1 1 340px;
  color: var(--text-dim);
  font-size: 1rem;
}

.hook-answer strong {
  color: var(--text);
}

/* Cards grid */
.grid {
  display: grid;
  gap: 24px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.2rem;
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* Principles */
.principle-card {
  position: relative;
}

.principle-number {
  position: absolute;
  top: 24px;
  right: 28px;
  font-family: "Comfortaa", sans-serif;
  font-size: 0.8rem;
  color: var(--text-faint);
}

.principle-banner {
  margin-top: 40px;
  border-radius: var(--radius);
  padding: 30px 34px;
  background: linear-gradient(120deg, rgba(44, 198, 250, 0.12), rgba(77, 108, 250, 0.12) 55%, rgba(200, 31, 214, 0.12));
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.principle-banner p {
  font-family: "Comfortaa", sans-serif;
  font-size: 1.15rem;
}

/* Case studies */
.case-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-meta {
  color: var(--text-faint);
  font-size: 0.82rem;
}

.case-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 6px 14px;
  font-size: 0.92rem;
}

.case-row dt {
  color: var(--text-faint);
  font-weight: 600;
}

.case-row dd {
  margin: 0 0 10px 0;
  color: var(--text-dim);
}

.case-result {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--text);
}

.case-result strong {
  color: var(--cyan);
}

.case-disclaimer {
  margin-top: 28px;
  font-size: 0.82rem;
  color: var(--text-faint);
  max-width: 700px;
}

/* Engineered by (specialists' background logos) */
#engineered-by {
  padding: 56px 0;
}

.engineered-label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: center;
  margin-bottom: 32px;
}

.engineered-logos {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 36px;
}

/* Etichetta interna alla colonna: la spaziatura la dà il gap del contenitore */
.engineered-logos .engineered-label {
  margin-bottom: 0;
}

.engineered-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 32px 40px;
}

.engineered-marquee {
  width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 64px, #000 calc(100% - 64px), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 64px, #000 calc(100% - 64px), transparent 100%);
}

.engineered-track {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  width: max-content;
  gap: 40px;
  animation: engineered-scroll 32s linear infinite;
}

.engineered-track:hover {
  animation-play-state: paused;
}

@keyframes engineered-scroll {
  from {
    transform: translateX(-50%);
  }
  to {
    transform: translateX(0%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .engineered-track {
    animation: none;
  }
}

.engineered-logo {
  height: 30px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.engineered-logo:hover {
  opacity: 1;
}

.engineered-logo.logo-alcoa,
.engineered-logo.logo-unibz,
.engineered-logo.logo-bt {
  height: 40px;
}

.engineered-logo.logo-arcelormittal {
  height: 38px;
}

.engineered-logo.logo-autodesk {
  height: 26px;
  max-width: 230px;
}

.engineered-logo.logo-unibo {
  height: 110px;
  max-width: 160px;
}

/* Method panel (RAG + fine-tuning) */
.method-panel {
  margin-top: 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

.method-copy h2 {
  font-size: 1.35rem;
  margin: 14px 0 16px;
}

.method-copy p {
  color: var(--text-dim);
  font-size: 0.96rem;
  margin-bottom: 14px;
}

.method-copy strong {
  color: var(--text);
}

.method-visual svg {
  width: 100%;
  height: auto;
}

.visual-caption {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-faint);
}

.workflow-panel {
  margin-top: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 40px;
}

.workflow-panel svg {
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
  display: block;
}

.workflow-panel .visual-caption {
  text-align: center;
  max-width: 640px;
  margin: 18px auto 0;
}

@media (max-width: 860px) {
  .method-panel {
    grid-template-columns: 1fr;
  }
}

/* Tiers */
.tier-card {
  display: flex;
  flex-direction: column;
}

.tier-name {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-weight: 700;
  margin-bottom: 8px;
}

.tier-audience {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.tier-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.tier-list li {
  padding-left: 20px;
  position: relative;
}

.tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient);
}

.tier-price {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-faint);
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step {
  border-left: 2px solid var(--border-strong);
  padding-left: 20px;
}

.step-index {
  font-family: "Comfortaa", sans-serif;
  color: var(--text-faint);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.step h3 {
  font-size: 1.02rem;
  margin-bottom: 8px;
}

.step p {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* Team */
.team-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.team-avatar {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--gradient);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Comfortaa", sans-serif;
  font-weight: 700;
  color: #05060f;
}

.team-name {
  font-size: 1.02rem;
  margin-bottom: 4px;
}

.team-role {
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.team-title {
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.team-bio {
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* CTA / contact */
.cta-section {
  background: var(--surface);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.cta-copy h2 {
  margin-bottom: 16px;
}

.cta-copy p {
  color: var(--text-dim);
  margin-bottom: 24px;
}

.cta-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.cta-list li {
  padding-left: 22px;
  position: relative;
}

.cta-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
}

.form-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.field {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.field input,
.field textarea {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 11px 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--cyan);
}

.form-note {
  margin-top: 14px;
  font-size: 0.8rem;
  color: var(--text-faint);
  text-align: center;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-faint);
  font-size: 0.85rem;
}

.footer-brand .brand-logo {
  height: 36px;
}

.footer-site {
  text-align: center;
  font-size: 0.85rem;
}

.footer-copyright {
  color: var(--text-faint);
  white-space: nowrap;
}

.footer-contact {
  text-align: left;
  font-size: 0.85rem;
}

.footer-contact a {
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.footer-contact a:hover {
  color: var(--cyan);
}

.footer-badge {
  font-family: "Comfortaa", "Inter", sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px 10px;
}

.footer-tagline {
  color: var(--text-faint);
  font-size: 0.82rem;
}

/* Mobile */
@media (max-width: 860px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
  .footer-brand,
  .footer-contact {
    text-align: center;
  }
  .footer-brand {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 720px) {
  .nav-links,
  .nav-cta .btn-ghost {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  body.nav-open .nav-links {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 18px;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .step {
    border-left: none;
    border-top: 2px solid var(--border-strong);
    padding-left: 0;
    padding-top: 16px;
  }
}

/* ---------------------------------------------------------------------------
   Fallback spaziatura per i browser senza "gap" nei flex container
   (Safari < 14.1, Chrome < 84, Firefox < 63). "inset" è arrivato nella
   stessa release di Safari del flex-gap, quindi "non supporta inset" è il
   proxy per intercettarli. Le griglie CSS non sono toccate: lì "gap"
   funziona anche su quei browser.
   --------------------------------------------------------------------------- */
@supports not (inset: 0) {

  /* Flex in colonna: spazio sopra ogni figlio dopo il primo */
  .case-card > * + *:not(.case-result) { margin-top: 16px; }
  .engineered-logos > * + * { margin-top: 36px; }
  .tier-list > * + * { margin-top: 10px; }
  .cta-list > * + * { margin-top: 12px; }
  .field > * + * { margin-top: 6px; }

  /* Flex in riga senza a-capo: spazio a sinistra */
  .nav-links > * + * { margin-left: 28px; }
  .team-card > * + * { margin-left: 18px; }
  .footer-brand > * + * { margin-left: 14px; }
  .engineered-track > * + * { margin-left: 40px; }
  .engineered-row > * + * { margin-left: 40px; }

  /* Flex in riga con a-capo: margine negativo sul contenitore, solo
     top/left per non toccare margin-bottom o il centraggio di .wrap */
  .hero-actions { margin-top: -14px; margin-left: -14px; }
  .hero-actions > * { margin-top: 14px; margin-left: 14px; }
  .hero-trust { margin-top: -28px; margin-left: -28px; }
  .hero-trust > * { margin-top: 28px; margin-left: 28px; }

  /* .hook-inner e .footer-inner hanno anche .wrap: niente margine negativo,
     solo spazio orizzontale, che diventa verticale quando impilano */
  .hook-inner > * + * { margin-left: 40px; }
  .footer-inner > * + * { margin-left: 24px; }
  @media (max-width: 860px) {
    .hook-inner > * + * { margin-left: 0; margin-top: 40px; }
    .footer-inner > * + * { margin-left: 0; margin-top: 24px; }
  }

  /* Menu mobile aperto: voci in colonna */
  @media (max-width: 720px) {
    body.nav-open .nav-links > * + * { margin-left: 0; margin-top: 18px; }
  }
}