/* =====================================================
   Retroage Engineering — design system
   Quiet luxury. Editorial. Native-typography first.
   ===================================================== */

:root {
  --bg:            #0a0a0c;
  --bg-1:          #0f0f12;
  --bg-2:          #14141a;
  --line:          rgba(255, 255, 255, 0.08);
  --line-strong:   rgba(255, 255, 255, 0.14);

  --ink:           #f4f4f6;
  --ink-2:         #c8c8d0;
  --ink-3:         #8a8a96;
  --ink-4:         #5a5a66;

  --accent:        #c4ff3d;          /* electric pistachio — singular accent */
  --accent-ink:    #0a0a0c;
  --accent-soft:   rgba(196, 255, 61, 0.12);

  --serif:         'Tiempos', 'PP Editorial New', 'Source Serif Pro', 'Georgia', serif;
  --sans:          'Inter var', 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
  --mono:          'JetBrains Mono', 'SF Mono', 'IBM Plex Mono', 'Menlo', monospace;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --container: 1240px;
  --pad: clamp(20px, 4vw, 40px);
  --section-y: clamp(96px, 12vw, 168px);

  --t-fast:   180ms cubic-bezier(.22, 1, .36, 1);
  --t-base:   320ms cubic-bezier(.22, 1, .36, 1);
  --t-slow:   620ms cubic-bezier(.22, 1, .36, 1);
}

@supports (font-variation-settings: normal) {
  :root { --sans: 'Inter var', system-ui, -apple-system, BlinkMacSystemFont, sans-serif; }
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
  background: var(--bg);
  color-scheme: dark;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--sans);
  font-feature-settings: 'ss01', 'cv11', 'calt';
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(196,255,61,.05), transparent 60%),
    radial-gradient(900px 600px at -10% 30%, rgba(80,120,255,.06), transparent 60%),
    var(--bg);
}

::selection { background: var(--accent); color: var(--accent-ink); }

a { color: inherit; text-decoration: none; }

/* ---------- Atmospheric layers ---------- */
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: .035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}
.mesh {
  position: fixed; inset: -10%; pointer-events: none; z-index: 0; filter: blur(80px);
  background:
    radial-gradient(600px 400px at 18% 20%, rgba(196,255,61,.08), transparent 70%),
    radial-gradient(700px 500px at 85% 40%, rgba(120,80,255,.10), transparent 65%),
    radial-gradient(500px 400px at 60% 90%, rgba(60,160,255,.07), transparent 70%);
  opacity: .85;
}

/* ---------- Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad);
  position: relative;
  z-index: 2;
}

main { position: relative; z-index: 2; }

.section { padding: var(--section-y) 0; position: relative; }
.section-tinted {
  background: linear-gradient(180deg, transparent, rgba(255,255,255,.015) 20%, rgba(255,255,255,.015) 80%, transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  padding: 16px 0;
  transition: background var(--t-base), border-color var(--t-base), padding var(--t-base);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(10, 10, 12, 0.72);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom-color: var(--line);
  padding: 10px 0;
}
.nav {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 32px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); letter-spacing: -0.01em;
}
.brand-mark { width: 28px; height: 28px; color: var(--ink); }
.brand-word {
  font-weight: 600; font-size: 15px; letter-spacing: -0.01em;
  display: inline-flex; align-items: baseline; gap: 6px;
}
.brand-sub {
  font-weight: 400; color: var(--ink-3); font-size: 13px;
  letter-spacing: 0.04em; text-transform: uppercase;
}

.primary {
  display: flex; gap: 26px; justify-self: center;
}
.primary a {
  font-size: 14px; color: var(--ink-2); position: relative; padding: 6px 0;
  transition: color var(--t-fast);
}
.primary a:hover { color: var(--ink); }
.primary a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: var(--ink); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-base);
}
.primary a:hover::after { transform: scaleX(1); }

.menu-btn {
  display: none;
  background: transparent; border: 1px solid var(--line); border-radius: 10px;
  width: 40px; height: 40px; padding: 10px; cursor: pointer; color: var(--ink);
}
.menu-btn span { display: block; height: 1.5px; background: currentColor; margin: 4px 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 14px; font-weight: 500; letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-base), color var(--t-base), border-color var(--t-base), box-shadow var(--t-base);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 10px 16px; font-size: 13px; }
.btn-md { padding: 14px 22px; }
.btn-lg { padding: 18px 28px; font-size: 15px; }

.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, 0 10px 28px -10px rgba(196,255,61,.5);
}
.btn-primary:hover {
  box-shadow: 0 1px 0 rgba(255,255,255,.18) inset, 0 14px 36px -10px rgba(196,255,61,.6);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255,255,255,.02);
  border-color: var(--line-strong);
  color: var(--ink);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.22);
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(96px, 16vw, 200px) 0 clamp(72px, 10vw, 120px);
  position: relative;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink-3); margin: 0 0 28px;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px;
  background: rgba(255,255,255,.02);
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--accent-soft); }
  50% { box-shadow: 0 0 0 8px transparent; }
}

.display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(44px, 8vw, 104px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
  max-width: 14ch;
}
.display em {
  font-style: italic;
  color: var(--ink-2);
  font-feature-settings: 'ss01';
}
.kerning { letter-spacing: -0.01em; color: var(--accent); font-style: italic; font-family: var(--serif); }

.lede {
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 56ch;
  margin: 0 0 40px;
}

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 80px; }

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 0;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat-strip > div { padding: 0 24px; border-left: 1px solid var(--line); }
.stat-strip > div:first-child { padding-left: 0; border-left: none; }
.stat-strip dt {
  font-size: 12px; color: var(--ink-3); margin: 0 0 8px;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.stat-strip dd {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(22px, 2.2vw, 32px);
  letter-spacing: -0.02em;
  color: var(--ink);
}
.stat-strip dd span { color: var(--accent); margin-left: 2px; }

/* ---------- Trust strip ---------- */
.strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
  background: linear-gradient(180deg, rgba(255,255,255,.012), transparent);
}
.strip-row {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.strip-label {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px; color: var(--ink-4);
  margin-right: 10px;
}
.strip-row .bullet { color: var(--ink-4); }

/* ---------- Section heads ---------- */
.section-head {
  max-width: 760px;
  margin: 0 0 56px;
}
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 18px;
}
.h-display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
}
.h-mega {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 7.5vw, 96px);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
}
.h-mega em { font-style: italic; color: var(--accent); }
.sub {
  font-size: 17px; color: var(--ink-2); max-width: 56ch; margin: 0;
}

/* ---------- Work grid ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.card {
  grid-column: span 4;
  background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.005));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-base), background var(--t-base), transform var(--t-base);
  display: flex; flex-direction: column; gap: 14px;
  min-height: 220px;
}
.card::before {
  content: ''; position: absolute; inset: -1px;
  background: linear-gradient(135deg, transparent, transparent 60%, rgba(196,255,61,.12));
  opacity: 0; transition: opacity var(--t-base);
  border-radius: inherit; pointer-events: none;
}
.card:hover {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  transform: translateY(-2px);
}
.card:hover::before { opacity: 1; }

.card-feature {
  grid-column: span 12;
  min-height: 320px;
  background:
    radial-gradient(700px 400px at 90% 0%, rgba(196,255,61,.10), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  padding: 40px;
}
.card-feature .card-title {
  font-size: clamp(36px, 4.4vw, 56px);
  margin-top: 8px;
}
.card-feature .card-desc {
  font-size: 18px; max-width: 56ch;
}

.card-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-3);
}
.tag {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.02);
}
.status {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--ink-2);
}
.status::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}

.card-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(22px, 2.2vw, 30px);
  letter-spacing: -0.02em;
  margin: 0;
}
.card-desc { color: var(--ink-2); margin: 0; font-size: 15.5px; line-height: 1.5; }
.card-list {
  list-style: none; padding: 0; margin: 8px 0 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px;
}
.card-list li {
  font-family: var(--mono); font-size: 12px; color: var(--ink-3);
  padding-left: 18px; position: relative;
}
.card-list li::before {
  content: ''; position: absolute; left: 0; top: 50%;
  width: 10px; height: 1px; background: var(--accent);
}
.card-foot {
  margin-top: auto; padding-top: 20px;
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: 12px; color: var(--ink-3);
  border-top: 1px solid var(--line);
}
.card-foot .arrow { transition: transform var(--t-base); color: var(--accent); }
.card-feature:hover .card-foot .arrow { transform: translateX(6px); }

/* ---------- Principles ---------- */
.principles { }
.principles-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.principle {
  padding: 40px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 14px;
  position: relative;
  transition: background var(--t-base);
}
.principle:hover { background: rgba(255,255,255,.015); }
.principle-num {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  color: var(--ink-4); text-transform: uppercase;
}
.principle h3 {
  font-family: var(--serif); font-weight: 400; font-size: clamp(22px, 2.4vw, 30px);
  margin: 0; letter-spacing: -0.02em; color: var(--ink);
}
.principle p { color: var(--ink-2); margin: 0; max-width: 52ch; line-height: 1.6; }
.principle p em { color: var(--ink); font-style: italic; }

/* ---------- Studio block ---------- */
.studio {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px;
  align-items: start;
}
.studio-text > p {
  color: var(--ink-2);
  font-size: 17px; max-width: 58ch; margin: 0 0 18px;
}
.studio-text .btn { margin-top: 16px; }

.studio-card {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.005));
  padding: 8px 24px;
  align-self: stretch;
}
.studio-card-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.studio-card-row:last-child { border-bottom: none; }
.studio-card-row .k {
  font-family: var(--mono); font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink-3);
}
.studio-card-row .v { color: var(--ink); font-size: 14.5px; }

/* ---------- Contact ---------- */
.section-contact {
  text-align: center;
  background:
    radial-gradient(900px 500px at 50% 100%, rgba(196,255,61,.06), transparent 60%),
    transparent;
}
.contact { max-width: 980px; margin: 0 auto; }
.contact .kicker { text-align: center; }
.contact .h-mega { margin-left: auto; margin-right: auto; }
.contact-sub {
  font-size: 17px; color: var(--ink-2); max-width: 60ch; margin: 0 auto 36px;
}
.contact .btn-lg { font-family: var(--mono); font-size: 14.5px; letter-spacing: 0.01em; }
.contact-foot {
  margin: 28px 0 0; color: var(--ink-3); font-size: 14px;
}
.contact-foot a { color: var(--ink); border-bottom: 1px solid var(--line-strong); }
.contact-foot a:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,.4));
  position: relative; z-index: 2;
}
.footer {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}
.footer-brand .brand-word { font-size: 16px; }
.footer-brand p {
  margin: 14px 0 0; color: var(--ink-3); max-width: 36ch; font-size: 14.5px; line-height: 1.55;
}
.footer-cols {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.footer-col h4 {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-3); margin: 0 0 18px; font-weight: 500;
}
.footer-col a {
  display: block; padding: 6px 0; color: var(--ink-2); font-size: 14.5px;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--ink-3); font-size: 13px;
}
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px;
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-2);
  background: rgba(255,255,255,.02);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Long-form (privacy / terms) ---------- */
.legal-hero { padding: clamp(120px, 14vw, 180px) 0 0; }
.legal-hero .display { font-size: clamp(40px, 6vw, 76px); margin-bottom: 18px; max-width: none; }
.legal-meta { color: var(--ink-3); font-family: var(--mono); font-size: 13px; margin: 0; }
.legal-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; color: var(--ink-2);
  margin: 32px 0 24px;
}
.legal-back:hover { color: var(--accent); }

.prose {
  max-width: 68ch;
  margin: 32px 0 0;
  font-size: 16.5px; line-height: 1.75; color: var(--ink-2);
}
.prose h2 {
  font-family: var(--serif); font-weight: 400; font-size: 26px;
  letter-spacing: -0.015em; color: var(--ink);
  margin: 48px 0 14px;
}
.prose p { margin: 0 0 18px; }
.prose a { color: var(--accent); border-bottom: 1px solid currentColor; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav { grid-template-columns: 1fr auto auto; gap: 16px; }
  .primary {
    position: fixed; inset: 64px 12px auto 12px;
    background: rgba(10, 10, 12, 0.96);
    backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 18px;
    flex-direction: column;
    gap: 4px; align-items: stretch;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity var(--t-base), transform var(--t-base);
    z-index: 60;
  }
  .primary.open { opacity: 1; transform: none; pointer-events: auto; }
  .primary a { padding: 14px 12px; border-radius: 10px; font-size: 15px; }
  .primary a:hover { background: rgba(255,255,255,.04); }
  .primary a::after { display: none; }
  .menu-btn { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; }
  .nav .btn-ghost { display: none; }

  .stat-strip { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-strip > div { padding: 12px 16px; border-left: none; border-top: 1px solid var(--line); }
  .stat-strip > div:nth-child(-n+2) { border-top: none; }

  .card { grid-column: span 6; }
  .card-feature { grid-column: span 12; padding: 28px; }
  .card-feature .card-list { grid-template-columns: 1fr; }

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

  .studio { grid-template-columns: 1fr; gap: 32px; }

  .footer { grid-template-columns: 1fr; gap: 32px; }
  .footer-cols { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .footer-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
}

@media (max-width: 600px) {
  .card { grid-column: span 12; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .display { font-size: clamp(40px, 12vw, 64px); }
  .h-mega { font-size: clamp(36px, 12vw, 64px); }
}