@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Sora:wght@500;600;700&display=swap');

:root {
  --abyss: #0B0F14;
  --graphite: #1B222B;
  --aurora: #6C8CFF;
  --frost: #F3F6FA;
  --haze: #9AA4B2;
  --aurora-dim: rgba(108, 140, 255, 0.15);
  --aurora-glow: rgba(108, 140, 255, 0.35);
  --header-h: 72px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
  --max-w: 1180px;
  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--frost);
  background: var(--abyss);
  -webkit-font-smoothing: antialiased;
}

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

a { color: currentColor; text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.82; }

a.btn,
a.btn:hover,
a.btn-aurora,
a.btn-aurora:hover,
a.btn-outline,
a.btn-outline:hover {
  opacity: 1;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--frost);
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }

p { margin-bottom: 1rem; color: var(--haze); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1rem 1.25rem; color: var(--haze); }
li { margin-bottom: 0.4rem; }

.surface-abyss { background: var(--abyss); color: var(--frost); }
.surface-frost { background: var(--frost); color: var(--abyss); }
.surface-graphite { background: var(--graphite); color: var(--frost); }
.surface-aurora { background: var(--aurora); color: var(--abyss); }

.surface-frost p,
.surface-frost li { color: #3a4450; }
.surface-frost h1,
.surface-frost h2,
.surface-frost h3 { color: var(--abyss); }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition), position var(--transition);
}

.site-header.is-sticky {
  position: fixed;
  background: rgba(11, 15, 20, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(108, 140, 255, 0.12);
  padding: 0.65rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--frost);
  letter-spacing: -0.02em;
}

.logo span { color: var(--aurora); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(108, 140, 255, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  color: var(--frost);
  cursor: pointer;
  font-size: 0.85rem;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
}

.main-nav a {
  display: block;
  padding: 0.5rem 0.85rem;
  color: var(--haze);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--frost);
  background: rgba(108, 140, 255, 0.1);
}

.nav-cta {
  margin-left: 0.5rem;
}

.nav-cta .btn-aurora {
  white-space: nowrap;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: 0 2px 12px rgba(11, 15, 20, 0.35);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), filter var(--transition);
  text-decoration: none;
}

.btn-aurora,
.main-nav a.btn-aurora {
  background: var(--aurora);
  color: var(--abyss);
}

.btn-aurora:hover,
.main-nav a.btn-aurora:hover {
  background: #8099ff;
  color: var(--abyss);
  box-shadow: 0 4px 24px var(--aurora-glow);
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.btn-outline {
  background: transparent;
  color: var(--frost);
  border: 1px solid rgba(243, 246, 250, 0.25);
}

.btn-outline:hover {
  border-color: var(--aurora);
  color: var(--aurora);
}

.btn-sm { padding: 0.55rem 1.15rem; font-size: 0.875rem; line-height: 1.3; }

/* Hero FLOW CONSOLE */
.hero-console {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}

@media (max-width: 768px) {
  .hero-console { min-height: 82vh; }
}

.hero-vortex-motif {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  z-index: 2;
  pointer-events: none;
}

.hero-console__badge {
  position: absolute;
  top: calc(var(--header-h) + 1.5rem);
  right: 1.5rem;
  z-index: 3;
  padding: 0.75rem 1.1rem;
  background: rgba(243, 246, 250, 0.07);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(154, 164, 178, 0.35);
  border-radius: var(--radius);
}

.badge-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--aurora);
  margin-bottom: 0.5rem;
}

.badge-rail {
  display: flex;
  gap: 0.35rem;
  font-family: ui-monospace, monospace;
  font-size: 0.65rem;
  color: var(--haze);
  letter-spacing: 0.04em;
}

.badge-rail span {
  padding: 0.15rem 0.3rem;
  border-left: 1px solid var(--aurora);
}

.hero-console .eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--aurora);
  margin-bottom: 1rem;
}

.hero-trust-strip {
  position: relative;
  z-index: 2;
  padding: 1rem 1.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--haze);
  border-top: 1px solid rgba(154, 164, 178, 0.35);
  text-align: center;
}

.hero-console__bg {
  position: absolute;
  inset: 0;
  background: url('/images/neuralvortex-01-hero-console.jpg') center/cover no-repeat;
}

.hero-console__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 15, 20, 0.88) 0%, rgba(11, 15, 20, 0.65) 50%, rgba(27, 34, 43, 0.75) 100%);
}

.hero-console__content {
  position: relative;
  z-index: 2;
  padding: calc(var(--header-h) + 4rem) 0 4rem;
  max-width: 720px;
}

.hero-console__content h1 { margin-bottom: 1.25rem; }
.hero-console__content h1 .aurora { color: var(--aurora); }

.hero-console__lead {
  font-size: 1.15rem;
  color: var(--haze);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-console__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  position: relative;
}

.page-hero--image {
  min-height: 340px;
  display: flex;
  align-items: flex-end;
}

.page-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.page-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--abyss) 0%, rgba(11, 15, 20, 0.7) 100%);
}

.page-hero__inner {
  position: relative;
  z-index: 2;
  padding-bottom: 2rem;
}

.page-hero__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--aurora);
  margin-bottom: 0.75rem;
}

/* Sections */
.section { padding: 4.5rem 0; }
.section--compact { padding: 3rem 0; }

.section-header {
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.section-header p { font-size: 1.05rem; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--graphite);
  border: 1px solid rgba(108, 140, 255, 0.1);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(108, 140, 255, 0.3);
  transform: translateY(-2px);
}

.card h3 { color: var(--frost); }

.card-icon {
  width: 40px;
  height: 40px;
  background: var(--aurora-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--aurora);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
}

.image-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(108, 140, 255, 0.12);
}

.image-frame img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--aurora);
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--haze);
}

/* Services list */
.service-block {
  padding: 2rem 0;
  border-bottom: 1px solid rgba(108, 140, 255, 0.1);
}

.service-block:last-child { border-bottom: none; }

.service-block h3 {
  color: var(--aurora);
  font-size: 1.35rem;
}

/* Work cases */
.case-card {
  background: var(--graphite);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(108, 140, 255, 0.1);
}

.case-card__img img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

.case-card__body { padding: 1.5rem; }

.case-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--aurora);
  background: var(--aurora-dim);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

/* FAQ */
.faq-list { max-width: 780px; }

.faq-item {
  border-bottom: 1px solid rgba(108, 140, 255, 0.12);
  padding: 1.25rem 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--frost);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

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

.faq-item summary::after {
  content: '+';
  color: var(--aurora);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.faq-item[open] summary::after { content: 'в€’'; }

.faq-item .faq-answer {
  padding-top: 1rem;
  color: var(--haze);
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--frost);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--abyss);
  border: 1px solid rgba(108, 140, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--frost);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--aurora);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.form-group--full { grid-column: 1 / -1; }

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--haze);
}

.form-check input { margin-top: 0.25rem; accent-color: var(--aurora); }

.hp,
.hp-field {
  position: absolute;
  left: -9999px;
  width: 0;
  height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.form-error {
  background: rgba(255, 80, 80, 0.1);
  border: 1px solid rgba(255, 80, 80, 0.3);
  color: #ff8080;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* Legal prose */
.legal-content {
  max-width: 780px;
}

.legal-content h2 {
  margin-top: 2.5rem;
  font-size: 1.35rem;
}

.legal-content h2:first-child { margin-top: 0; }

.legal-content h3 {
  margin-top: 1.5rem;
  font-size: 1.1rem;
  color: var(--haze);
}

.legal-meta {
  font-size: 0.85rem;
  color: var(--haze);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(108, 140, 255, 0.12);
}

/* CTA band */
.cta-band {
  text-align: center;
  padding: 3.5rem 2rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--graphite) 0%, rgba(108, 140, 255, 0.12) 100%);
  border: 1px solid rgba(108, 140, 255, 0.2);
}

.cta-band h2 { margin-bottom: 0.75rem; }
.cta-band p { max-width: 520px; margin: 0 auto 1.5rem; }

/* Footer */
.site-footer {
  padding: 3.5rem 0 2rem;
  border-top: 1px solid rgba(108, 140, 255, 0.12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand .logo { margin-bottom: 0.75rem; display: inline-block; }

.footer-brand p { font-size: 0.9rem; }

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--haze);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  margin: 0;
}

.footer-col li { margin-bottom: 0.5rem; }

.footer-col a {
  color: var(--haze);
  font-size: 0.9rem;
}

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

.footer-contact address {
  font-style: normal;
  font-size: 0.9rem;
  color: var(--haze);
  line-height: 1.7;
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(108, 140, 255, 0.08);
  font-size: 0.8rem;
  color: var(--haze);
}

.footer-bottom a { color: var(--haze); font-size: 0.8rem; }

/* 404 */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: calc(var(--header-h) + 3rem) 0 4rem;
}

.error-page h1 { margin-bottom: 1rem; }
.error-page p { max-width: 480px; margin: 0 auto 2rem; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--graphite);
  color: var(--frost);
  border-top: 1px solid rgba(108, 140, 255, 0.35);
  padding: 1.25rem 1.5rem;
  transform: translateY(100%);
  transition: transform 0.35s ease;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.35);
}

.cookie-banner.is-visible { transform: translateY(0); }

/* Scroll reveal */
.js .reveal { opacity: 1; transform: translateY(0); transition: opacity 0.7s ease, transform 0.7s ease; }
@media (prefers-reduced-motion: no-preference) {
  .js .reveal:not(.is-visible) { opacity: 0.92; transform: translateY(14px); }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
}

.cookie-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cookie-text {
  flex: 1;
  min-width: 260px;
  font-size: 0.85rem;
  color: var(--haze);
}

.cookie-text a { color: var(--aurora); }

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
}

.cookie-actions .btn {
  min-height: 2.25rem;
}

.cookie-actions .btn-aurora {
  background: var(--aurora);
  color: var(--abyss);
  border: 1px solid var(--aurora);
}

.cookie-actions .btn-outline {
  background: rgba(243, 246, 250, 0.08);
  color: var(--frost);
  border: 1px solid rgba(243, 246, 250, 0.55);
}

.cookie-actions .btn-outline:hover {
  background: rgba(108, 140, 255, 0.14);
  color: var(--frost);
  border-color: var(--aurora);
  opacity: 1;
}

.cookie-panel {
  display: none;
  width: 100%;
  padding-top: 1rem;
  border-top: 1px solid rgba(108, 140, 255, 0.12);
  margin-top: 0.5rem;
}

.cookie-panel.is-open { display: block; }

.cookie-panel label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--haze);
  margin-bottom: 0.5rem;
}

.cookie-panel input { accent-color: var(--aurora); }

/* Thanks page */
.thanks-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 3rem) 0 4rem;
}

.thanks-box {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
}

.thanks-box h1 { margin-bottom: 1rem; }

/* Responsive */
@media (max-width: 900px) {
  .grid-2, .grid-3, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .footer-grid { gap: 1.5rem; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(300px, 85vw);
    height: 100vh;
    background: var(--graphite);
    padding: 5rem 1.5rem 2rem;
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
  }

  .main-nav.is-open { transform: translateX(0); }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav a { padding: 0.75rem 1rem; }

  .nav-cta { margin-left: 0; margin-top: 0.5rem; }

  .hero-console__badge {
    top: calc(var(--header-h) + 0.75rem);
    right: 1rem;
    font-size: 0.65rem;
  }

  .section { padding: 3rem 0; }
}