/* ═══════════════════════════════════════════════════════
   THEME SYSTEM — Dark only
   ═══════════════════════════════════════════════════════ */

:root {
  --navy: #0A1628;
  --navy-deep: #060F1C;
  --surface: #0F1D2F;
  --card: #111E30;
  --card-hover: #162640;
  --border: #1A2D45;
  --border-light: #1E3250;
  --accent: #F97316;
  --accent-hover: #FB923C;
  --accent-dim: rgba(249,115,22,0.10);
  --accent-glow: rgba(249,115,22,0.15);
  --teal: #14B8A6;
  --teal-dim: rgba(20,184,166,0.10);
  --amber: #FBBF24;
  --amber-dim: rgba(251,191,36,0.15);
  --white: #F8FAFC;
  --text: #E2E8F0;
  --text-dim: #94A3B8;
  --text-muted: #64748B;
  --text-dark: #475569;
  --red: #EF4444;
  --nav-bg: rgba(10, 22, 40, 0.85);
  --nav-border: rgba(30, 50, 80, 0.5);
  --mobile-bg: rgba(6, 15, 28, 0.97);
  --shadow-card: none;
  --shadow-card-hover: none;
  color-scheme: dark;

  /* Shared non-theme tokens */
  --font-body: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-w: 1200px;
  --section-pad: clamp(4rem, 8vw, 7rem);
}

/* ═══════════════════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════════════════ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--navy);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ═══════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { opacity: 0; animation: fadeUp 0.7s ease forwards; }
.fade-up-d1 { animation-delay: 0.1s; }
.fade-up-d2 { animation-delay: 0.2s; }
.fade-up-d3 { animation-delay: 0.3s; }
.fade-up-d4 { animation-delay: 0.4s; }

/* ═══════════════════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════════════════ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}
section { padding: var(--section-pad) 0; position: relative; }

/* ═══════════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--nav-border);
  transition: all 0.3s ease;
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav-logo-icon { flex-shrink: 0; height: 32px; width: auto; }
.nav-logo-text {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--white);
  letter-spacing: -0.03em;
}
.nav-center {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-center a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.2s;
  position: relative;
}
.nav-center a:hover { color: var(--white); }
.nav-center a.active { color: var(--white); }
.nav-center a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-center a:hover::after { width: 100%; }
.nav-center a.active::after { width: 100%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1002;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1001;
  background: var(--mobile-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dim);
  transition: color 0.2s;
  padding: 0.5rem 0;
}
.mobile-menu a:hover,
.mobile-menu a.active { color: var(--white); }
.mobile-menu .btn-primary {
  margin-top: 1rem;
  font-size: 1rem;
  padding: 0.75rem 2rem;
}

/* ═══════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.25s ease;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: white;
  padding: 0.55rem 1.25rem;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(249,115,22,0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--border-light);
}
.btn-secondary:hover {
  border-color: var(--text-dim);
  color: var(--white);
}
.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding: 0;
  font-size: 0.85rem;
}
.btn-ghost:hover { color: var(--accent-hover); }
.btn-ghost svg { transition: transform 0.2s; }
.btn-ghost:hover svg { transform: translateX(3px); }
.btn-teal {
  background: var(--teal);
  color: white;
  padding: 0.55rem 1.25rem;
}

/* ═══════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-brand { max-width: 320px; }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}
.footer-logo-icon { flex-shrink: 0; height: 26px; width: auto; }
.footer-logo-text {
  font-weight: 800;
  font-size: 1rem;
  color: var(--white);
  letter-spacing: -0.03em;
}
.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: 3rem;
}
.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.footer-social a {
  color: var(--text-muted);
  transition: color 0.2s;
  margin-left: 1rem;
}
.footer-social a:hover { color: var(--white); }

/* ═══════════════════════════════════════════════════════
   SHARED RESPONSIVE (nav + footer)
   ═══════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-center { display: none; }
  .nav-toggle { display: block; }
  .nav-inner > .btn-primary { display: none; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
}