:root {
  --color-bg: #0B1A2C;
  --color-card: #142A44;
  --color-gold: #D4AF37;
  --color-text: #E8ECF1;
  --color-text-secondary: #A0B0C0;
  --color-border: #2C4058;
  --color-hover: #3B5E7A;
  --color-gold-dim: rgba(212, 175, 55, 0.15);
  --nav-width: 280px;
  --max-width: 1200px;
  --font-primary: 'Inter', 'Helvetica Neue', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'SFMono-Regular', 'Menlo', 'Monaco', 'Consolas', monospace;
  --transition: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-primary);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--color-text); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus-visible { color: var(--color-gold); }
a:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; color: var(--color-text); }
::selection { background: var(--color-gold); color: var(--color-bg); }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-hover); }

/* Skip Link */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  background: var(--color-gold);
  color: var(--color-bg);
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 0 0 4px 4px;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0; color: var(--color-bg); }

/* Header / Left Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: linear-gradient(135deg, #0B1A2C 0%, #0F2240 100%);
  border-right: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
}
.nav-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1100;
  width: 44px;
  height: 44px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background var(--transition), border-color var(--transition);
}
.nav-toggle:hover, .nav-toggle:focus-visible { background: var(--color-hover); border-color: var(--color-gold); }
.nav-toggle:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; }
.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2.5rem 1.75rem 1.5rem;
}
.nav-brand { margin-bottom: 2.5rem; }
.nav-logo {
  display: inline-block;
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.03em;
  color: var(--color-gold);
  margin-bottom: 0.4rem;
  transition: opacity var(--transition);
}
.nav-logo:hover { opacity: 0.85; color: var(--color-gold); }
.nav-tagline {
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-left: 2px solid var(--color-gold);
  padding-left: 0.75rem;
}
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}
.nav-links a {
  display: block;
  padding: 0.65rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text);
  border-radius: 4px;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  position: relative;
}
.nav-links a:hover {
  background: var(--color-gold-dim);
  color: var(--color-gold);
  padding-left: 1.25rem;
}
.nav-links a:focus-visible {
  background: var(--color-gold-dim);
  color: var(--color-gold);
  outline: none;
  box-shadow: inset 0 0 0 2px var(--color-gold);
}
.nav-links a[aria-current="page"] {
  color: var(--color-gold);
  font-weight: 600;
  background: var(--color-gold-dim);
  border-left: 3px solid var(--color-gold);
  padding-left: 1rem;
}
.nav-decoration {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  position: relative;
}
.nav-decoration::before {
  content: '';
  position: absolute;
  top: -1px;
  right: 0;
  width: 40%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold));
}
.nav-coord {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  opacity: 0.7;
}

/* Footer */
.site-footer {
  background: #081524;
  border-top: 1px solid var(--color-border);
  padding: 3rem 1.5rem 1.5rem;
  margin-top: auto;
}
.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1fr;
  gap: 2.5rem;
}
.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.footer-trust {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 32em;
}
.footer-heading {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.5rem;
}
.footer-contact-item {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.4rem;
  line-height: 1.5;
}
.footer-contact-note {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  margin-top: 0.75rem;
  line-height: 1.6;
  opacity: 0.8;
  border-left: 2px solid var(--color-gold);
  padding-left: 0.75rem;
}
.footer-link {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 0.3rem 0;
  transition: color var(--transition), padding-left var(--transition);
}
.footer-link:hover { color: var(--color-gold); padding-left: 0.4rem; }
.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}
.footer-icp, .footer-copy { opacity: 0.7; }

/* Main Content Wrapper (for pages) */
.main-content {
  margin-left: var(--nav-width);
  padding: 2rem 2.5rem 3rem;
  flex: 1;
  min-height: 100vh;
}
.content-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Scroll Progress Bar (created by JS) */
.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--nav-width);
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), #E8C54A);
  z-index: 999;
  width: 0%;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 1024px) {
  :root { --nav-width: 240px; }
  .nav-inner { padding: 2rem 1.25rem 1.25rem; }
  .nav-logo { font-size: 1.5rem; }
  .main-content { padding: 1.5rem 1.5rem 2rem; }
}
@media (max-width: 768px) {
  :root { --nav-width: 0px; }
  .nav-toggle { display: flex; }
  .site-header {
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .site-header[data-open] { transform: translateX(0); }
  .site-header[data-open] + .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 999;
    backdrop-filter: blur(4px);
  }
  .nav-inner { padding: 2rem 1.5rem 1.5rem; }
  .main-content {
    margin-left: 0;
    padding: 1.25rem;
  }
  .scroll-progress { left: 0; }
  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .footer-trust { max-width: none; }
}
@media (max-width: 480px) {
  .nav-inner { padding: 1.5rem 1.25rem 1rem; }
  .nav-logo { font-size: 1.35rem; }
  .nav-links a { padding: 0.55rem 0.6rem; font-size: 0.9rem; }
  .main-content { padding: 1rem; }
  .site-footer { padding: 2rem 1rem 1rem; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  .site-header { transition: none; }
}

/* Utility */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }