:root {
  --bg: #0a0c10;
  --surface: #12151b;
  --surface-2: #171b23;
  --ink: #e7ebf1;
  --muted: #93a1b3;
  --line: rgba(255, 255, 255, 0.09);
  --brand: #7c5cff;
  --brand-2: #22d3ee;
  --brand-ink: #0a0c10;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 12, 16, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: clamp(0.68rem, 2.2vw, 0.98rem);
  white-space: nowrap;
}

.brand-mark--accent {
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.topnav a:not(.lang-btn) {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
}

.topnav a:not(.lang-btn):hover,
.topnav a:not(.lang-btn):focus-visible {
  color: var(--ink);
}

.menu-separator {
  width: 1px;
  height: 20px;
  background: var(--line);
}

.lang-menu, .footer-lang {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 26px;
  padding: 0 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--muted);
}

.lang-btn.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  padding: 9px 8px;
  cursor: pointer;
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
  border-color: var(--brand-2);
  background: rgba(255, 255, 255, 0.1);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  margin: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover, .btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 8px 30px rgba(124, 92, 255, 0.35);
}

.btn-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: var(--brand-2);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 12%, rgba(124, 92, 255, 0.22), transparent 42%),
    radial-gradient(circle at 85% 8%, rgba(34, 211, 238, 0.16), transparent 40%),
    var(--bg);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 12, 16, 0.35), rgba(10, 12, 16, 0.92) 88%);
}

.hero-body {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--brand-2);
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0 auto 32px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ---- Sections ---- */
.section {
  padding: 100px 0;
  border-top: 1px solid var(--line);
}

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

.section-head {
  max-width: 700px;
  margin: 0 0 48px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  margin: 6px 0 14px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.section-head-text {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ---- Split layout (engine / ai cluster) ---- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.split-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 20px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.visual-voxels {
  background:
    repeating-linear-gradient(0deg, rgba(124, 92, 255, 0.18) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, rgba(34, 211, 238, 0.18) 0 1px, transparent 1px 22px),
    radial-gradient(circle at 30% 30%, rgba(124, 92, 255, 0.35), transparent 55%),
    radial-gradient(circle at 75% 70%, rgba(34, 211, 238, 0.28), transparent 50%),
    var(--surface-2);
}

.visual-cluster {
  background-image:
    radial-gradient(circle, rgba(34, 211, 238, 0.55) 1.5px, transparent 1.6px);
  background-size: 26px 26px;
  background-position: 0 0;
  background-color: var(--surface-2);
}

.visual-cluster::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 35%, rgba(124, 92, 255, 0.35), transparent 50%),
    radial-gradient(circle at 75% 65%, rgba(34, 211, 238, 0.3), transparent 50%);
}

.feature-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.feature-list li {
  padding-left: 28px;
  position: relative;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.65;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.feature-list strong {
  color: var(--ink);
}

/* ---- Gallery ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.gallery-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  overflow: hidden;
}

.gallery-visual {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(124, 92, 255, 0.16), rgba(34, 211, 238, 0.12)),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 14px);
  border-bottom: 1px dashed var(--line);
}

.gallery-visual span {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.gallery-body {
  padding: 18px 20px 22px;
}

.gallery-tag {
  display: inline-block;
  margin: 0 0 10px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--brand-2);
}

.gallery-body h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.gallery-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---- Process ---- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.process-step {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 22px;
  background: var(--surface);
}

.process-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.process-step h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.process-step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ---- Contact CTA ---- */
.contact-section {
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(124, 92, 255, 0.18), transparent 55%),
    var(--bg);
}

.contact-section .section-head {
  margin-left: auto;
  margin-right: auto;
}

.contact-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 24px;
  background: var(--surface);
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 32ch;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.footer-nav a:hover, .footer-nav a:focus-visible {
  color: var(--ink);
}

.footer-copy {
  max-width: 1180px;
  margin: 32px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.footer-copy a {
  color: var(--brand-2);
  text-decoration: none;
}

/* ---- Legal page ---- */
.legal-body h2 {
  font-size: 1.3rem;
  margin: 36px 0 12px;
}

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

.legal-body p, .legal-body li {
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.96rem;
}

.legal-body ul {
  padding-left: 20px;
}

.legal-hero {
  padding: 64px 0 8px;
}

/* ---- 404 ---- */
.error-section {
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.error-section .section-head {
  margin: 0 auto;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
  }

  .topnav {
    display: none;
    position: fixed;
    left: 12px;
    right: 12px;
    top: 66px;
    max-height: calc(100vh - 82px);
    overflow-y: auto;
    background: rgba(15, 18, 24, 0.98);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  }

  .topnav a:not(.lang-btn) {
    font-size: 1rem;
    padding: 4px 0;
  }

  .topnav.is-open {
    display: flex;
  }

  .menu-separator {
    display: none;
  }

  .lang-menu {
    width: 100%;
    justify-content: flex-start;
  }

  .section {
    padding: 64px 0;
  }

  .hero-body {
    padding: 100px 20px 56px;
  }

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

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}