/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0d12;
  --bg-elevated: #10141b;
  --bg-elevated-2: #141922;
  --text: #eef1f5;
  --text-muted: #9099a8;
  --text-dim: #626b7a;
  --accent: #c9a961;
  --accent-soft: rgba(201, 169, 97, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --font-head: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --container: 1120px;
  --header-h: 76px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #0a0d12;
  padding: 10px 16px;
  z-index: 200;
  font-weight: 600;
}
.skip-link:focus { left: 24px; top: 24px; }

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

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background-color .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.site-header.scrolled {
  background: rgba(10, 13, 18, 0.82);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
}
.nav a { transition: color .2s ease; }
.nav a:hover { color: var(--text); }
.nav-cta {
  color: var(--text) !important;
  border: 1px solid var(--border-strong);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  transition: border-color .2s ease, background-color .2s ease;
}
.nav-cta:hover { border-color: var(--accent); background: var(--accent-soft); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--text);
  margin: 0 auto;
  transition: transform .25s ease, opacity .25s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
#network {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, transparent 0%, var(--bg) 92%),
    linear-gradient(180deg, rgba(10,13,18,0.2) 0%, var(--bg) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform .2s ease, background-color .2s ease, border-color .2s ease, color .2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #0a0d12;
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.scroll-cue {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px; height: 42px;
  border: 1.5px solid var(--border-strong);
  border-radius: 999px;
}
.scroll-cue span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  background: var(--accent);
  border-radius: 999px;
  animation: scroll-cue 1.8s ease-in-out infinite;
}
@keyframes scroll-cue {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(14px); }
  100% { opacity: 0; transform: translateY(14px); }
}

/* ---------- Sections ---------- */
.section {
  padding: 7.5rem 0;
}
.section-alt {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head { margin-bottom: 3rem; max-width: 640px; }
.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}
.lede {
  font-size: 1.15rem;
  color: var(--text);
}
.about-grid p { color: var(--text-muted); }
.about-grid .lede { color: var(--text); }

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--bg-elevated-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem 1.75rem;
  transition: border-color .25s ease, transform .25s ease;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
}
.card-icon {
  width: 42px; height: 42px;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}
.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Principles ---------- */
.principles-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.principle {
  display: flex;
  gap: 2rem;
  align-items: baseline;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}
.principle:last-child { border-bottom: 1px solid var(--border); }
.principle-num {
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
  min-width: 2.5rem;
}
.principle h3 { font-size: 1.15rem; margin-bottom: 0.4rem; }
.principle p { color: var(--text-muted); max-width: 560px; }

/* ---------- Contact ---------- */
.contact-inner {
  text-align: center;
  max-width: 640px;
}
.contact-inner h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); margin-bottom: 0.75rem; }
.contact-sub { color: var(--text-muted); margin-bottom: 2.25rem; }
.contact-inner .btn { margin: 0 auto; }
.fine-print {
  margin-top: 1.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-inner span { color: var(--text-muted); font-weight: 500; }
.disclaimer { max-width: 760px; line-height: 1.6; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-cue span { animation: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 24px 1.5rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .nav.open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
  }
  .nav a { padding: 0.85rem 0; width: 100%; border-bottom: 1px solid var(--border); }
  .nav-cta { margin-top: 0.75rem; text-align: center; border-bottom: 1px solid var(--border-strong) !important; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .section { padding: 5rem 0; }
  .principle { flex-direction: column; gap: 0.5rem; }
}