/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0b;
  --bg-alt: #101113;
  --border: #212327;
  --text: #f2f3f2;
  --text-muted: #9aa3ab;
  --text-faint: #6b7280;
  --accent: #6ee7b7;
  --accent-dim: #3f7a63;
  --radius: 8px;
  --max-width: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, p {
  margin: 0;
}

.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- Accessibility helpers ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  background: var(--accent);
  color: #06110c;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  z-index: 1000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(10, 10, 11, 0.92);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

.nav-desktop ul {
  display: flex;
  gap: 32px;
}

.nav-desktop a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.nav-cta {
  margin-left: auto;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-icon::before,
.menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.menu-icon::before {
  top: -6px;
}

.menu-icon::after {
  top: 6px;
}

.menu-toggle[aria-expanded="true"] .menu-icon {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 20px 24px 28px;
}

.nav-mobile[data-open="true"] {
  display: block;
}

.nav-mobile ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-mobile a {
  display: block;
  padding: 12px 4px;
  text-decoration: none;
  color: var(--text);
  font-size: 1rem;
  border-bottom: 1px solid var(--border);
}

.nav-mobile-cta {
  margin-top: 18px;
  width: 100%;
  text-align: center;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #06110c;
}

.btn-primary:hover {
  background: #86eec4;
}

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

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

/* ---------- Hero ---------- */
.hero {
  padding-block: 96px 80px;
  position: relative;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 46ch;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.orbital-svg {
  width: 100%;
  max-width: 480px;
}

.orbital-grid line {
  stroke: var(--border);
  stroke-width: 1;
}

.orbital-ring {
  fill: none;
  stroke: var(--border);
  stroke-width: 1;
}

.orbital-link {
  stroke: var(--accent-dim);
  stroke-width: 1;
}

.orbital-node {
  fill: var(--accent);
}

.orbital-core {
  fill: var(--bg-alt);
  stroke: var(--accent);
  stroke-width: 1.5;
}

.orbital-spin-slow,
.orbital-spin-fast {
  transform-origin: 260px 260px;
  animation: spin 40s linear infinite;
}

.orbital-spin-fast {
  animation-duration: 26s;
  animation-direction: reverse;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .orbital-spin-slow,
  .orbital-spin-fast {
    animation: none;
  }
}

/* ---------- Sections ---------- */
.section {
  padding-block: 88px;
  border-top: 1px solid var(--border);
}

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

.section-heading {
  margin-bottom: 44px;
  max-width: 60ch;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.about-copy p {
  color: var(--text-muted);
  font-size: 1.02rem;
  margin-bottom: 18px;
}

.about-copy p:last-child {
  margin-bottom: 0;
}

/* ---------- Capability grid ---------- */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.capability-card {
  background: var(--bg);
  padding: 36px 32px;
}

.capability-index {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.capability-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.capability-card p {
  color: var(--text-muted);
  font-size: 0.96rem;
}

/* ---------- Vision ---------- */
.vision-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.vision-lead {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 18px;
}

.vision-copy p:not(.vision-lead) {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ---------- Principles ---------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.principle {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  background: var(--bg);
}

.principle-index {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.principle h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.principle p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ---------- Contact ---------- */
.contact-section {
  text-align: center;
}

.contact-inner {
  max-width: 640px;
}

.contact-inner h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 18px;
}

.contact-text {
  color: var(--text-muted);
  font-size: 1.02rem;
  margin-bottom: 28px;
}

.contact-email {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 4px;
  transition: border-color 0.2s ease;
}

.contact-email:hover,
.contact-email:focus-visible {
  border-color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 44px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-logo {
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.footer-tag {
  color: var(--text-faint);
  font-size: 0.88rem;
}

.footer-nav {
  display: flex;
  gap: 24px;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.footer-copy {
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .orbital-svg {
    max-width: 320px;
  }

  .about-grid,
  .vision-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .nav-desktop,
  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

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

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

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

@media (max-width: 480px) {
  .hero {
    padding-block: 72px 56px;
  }

  .section {
    padding-block: 64px;
  }
}