/* Transit v3 — shared system */
:root {
  --sys-black: #0A0A0A;
  --sys-950: #0F0F0F;
  --sys-900: #141414;
  --sys-800: #1E1E1E;
  --sys-700: #2A2A2A;
  --sys-600: #363636;
  --sys-500: #4A4A4A;
  --sys-400: #6E6E6E;
  --sys-300: #9A9A9A;
  --sys-200: #D0D0D0;
  --sys-100: #EBEBEB;
  --sys-white: #F5F5F5;
  --volt: #C8FF00;
  --volt-dim: rgba(200, 255, 0, 0.15);
  --volt-ghost: rgba(200, 255, 0, 0.06);

  --grid: 48px;
  --pad-x: clamp(20px, 4vw, 48px);
  --density-row: 1.1;
  --density-pad: 1;
  --anim: 1;

  --ff-display: 'Barlow Condensed', 'Oswald', sans-serif;
  --ff-body: 'Barlow', system-ui, sans-serif;
  --ff-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--sys-black); color: var(--sys-white); font-family: var(--ff-body); font-weight: 300; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body { min-height: 100vh; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; color: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

/* Type */
.display {
  font-family: var(--ff-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 0.9;
}
.label {
  font-family: var(--ff-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 10px;
}
.mono { font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; }
.body { font-family: var(--ff-body); font-weight: 300; line-height: 1.55; }
.body strong { font-weight: 600; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  padding: 14px var(--pad-x);
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--sys-800);
  flex-wrap: nowrap;
}
.nav-cta { white-space: nowrap; flex-shrink: 0; }
.nav-left { display: flex; align-items: baseline; gap: 18px; min-width: 0; }
.wordmark { font-family: var(--ff-display); font-weight: 800; font-size: 22px; letter-spacing: -0.03em; }
.wordmark .dot { color: var(--volt); }
.nav-meta { display: none; }
@media (min-width: 1200px) { .nav-meta { display: flex; gap: 18px; align-items: center; } }
.nav-links { display: none; }
@media (min-width: 960px) {
  .nav-links { display: flex; gap: 22px; align-items: center; flex-wrap: nowrap; white-space: nowrap; }
}
.nav-link { font-family: var(--ff-display); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--sys-200); }
.nav-link:hover { color: var(--volt); }
.nav-link.active { color: var(--volt); }
.nav-cta {
  font-family: var(--ff-display); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em;
  padding: 10px 16px; background: var(--volt); color: var(--sys-black); border-radius: 2px;
}
.nav-burger { display: inline-flex; flex-direction: column; gap: 4px; padding: 8px; }
.nav-burger span { display: block; width: 20px; height: 1.5px; background: var(--sys-200); }
@media (min-width: 900px) { .nav-burger { display: none; } }

/* Section frame */
.section {
  border-top: 1px solid var(--sys-800);
  padding: calc(64px * var(--density-pad)) var(--pad-x);
}
.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--sys-800);
}
@media (min-width: 900px) {
  .section-head { grid-template-columns: auto 1fr auto; align-items: end; gap: 28px; }
}
.section-head .index { color: var(--volt); font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; }
.section-head .title { font-family: var(--ff-display); font-weight: 800; text-transform: uppercase; letter-spacing: -0.015em; font-size: clamp(32px, 5vw, 56px); line-height: 0.95; }
.section-head .meta { color: var(--sys-400); font-family: var(--ff-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; justify-self: start; }
@media (min-width: 900px) { .section-head .meta { justify-self: end; } }

/* Status pill */
.status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-display); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.14em; font-size: 10px;
  padding: 5px 9px;
  border: 1px solid var(--sys-700);
  color: var(--sys-200);
}
.status::before {
  content: ''; display: block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--volt); box-shadow: 0 0 8px var(--volt);
  animation: pulse calc(2s / var(--anim)) infinite;
}
.status.active { color: var(--volt); border-color: var(--volt-dim); }
.status.quiet::before { background: var(--sys-400); box-shadow: none; animation: none; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--ff-display); font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.14em; font-size: 13px;
  padding: 14px 20px;
  border: 1px solid var(--sys-700);
  color: var(--sys-white);
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}
.btn:hover { border-color: var(--volt); color: var(--volt); }
.btn-primary { background: var(--volt); color: var(--sys-black); border-color: var(--volt); }
.btn-primary:hover { background: var(--sys-white); color: var(--sys-black); border-color: var(--sys-white); }
.btn .arrow { display: inline-block; transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* Grid / infrastructure bg */
.grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--sys-800) 1px, transparent 1px),
    linear-gradient(to bottom, var(--sys-800) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  opacity: 0.35;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--sys-800);
  padding: 48px var(--pad-x) 24px;
  background: var(--sys-950);
}
footer.site-footer .row { display: grid; grid-template-columns: 1fr; gap: 32px; margin-bottom: 32px; }
@media (min-width: 720px) { footer.site-footer .row { grid-template-columns: 2fr 1fr 1fr 1fr; } }
footer.site-footer h4 { font-family: var(--ff-display); font-weight: 600; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--sys-400); margin-bottom: 14px; }
footer.site-footer ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
footer.site-footer a { color: var(--sys-200); font-size: 13px; }
footer.site-footer a:hover { color: var(--volt); }
footer.site-footer .legal { display: flex; justify-content: space-between; gap: 16px; padding-top: 24px; border-top: 1px solid var(--sys-800); color: var(--sys-400); font-family: var(--ff-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; flex-wrap: wrap; }

/* Bilingual — pages with data-en / data-es copy toggle via body.es class */
[data-es] { display: none; }
body.es [data-en] { display: none; }
body.es [data-es] { display: revert; }

/* Language toggle button (used in nav of bilingual pages) */
.lang-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--ff-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--sys-300); padding: 6px 10px;
  border: 1px solid var(--sys-700); background: transparent; cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.lang-toggle:hover { border-color: var(--volt); color: var(--volt); }
.lang-toggle .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--volt); display: inline-block; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}