/* Atom Forge — design system (dark + crimson) */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Geist:wght@300;400;500;600;700&family=Geist+Mono:wght@300;400;500&family=Inter+Tight:wght@400;500;600;700;800;900&display=swap');

:root {
  --bg: #0E0E12;
  --bg-2: #16161B;
  --bg-3: #1E1E24;
  --surface: #25252C;
  --ink: #EDEBE6;
  --ink-dim: #A8A59E;
  --ink-mute: #6E6B63;
  --cream: #EDEBE6;
  --cream-2: #22222A;
  --cream-3: #2A2A32;
  --muted: #6E6B63;
  --crimson: #DC2A44;
  --crimson-deep: #A61630;
  --crimson-glow: #EB4A60;
  --ember: #DC2A44;
  --ember-deep: #A61630;
  --plasma: #DC2A44;
  --plasma-deep: #A61630;
  --line: rgba(237,235,230,0.09);
  --line-cream: rgba(237,235,230,0.09);

  --serif: 'Instrument Serif', ui-serif, Georgia, serif;
  --display: 'Inter Tight', 'Geist', ui-sans-serif, system-ui, sans-serif;
  --sans: 'Geist', ui-sans-serif, system-ui, sans-serif;
  --mono: 'Geist Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--bg); }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--crimson); color: var(--ink); }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* Typography */
.display {
  font-family: var(--display);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-feature-settings: 'ss01' 1, 'cv11' 1;
  text-wrap: balance;
  overflow-wrap: break-word;
  word-break: normal;
  hyphens: none;
}
h1.display, h2.display, h3.display { text-wrap: balance; }
.display-italic {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.eyebrow-dot::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--crimson);
  margin-right: 10px;
  vertical-align: middle;
  transform: translateY(-1px);
  box-shadow: 0 0 10px var(--crimson);
}

/* Layout */
.shell { max-width: 1440px; margin: 0 auto; padding: 0 40px; }
.shell-wide { max-width: 1680px; margin: 0 auto; padding: 0 32px; }
@media (max-width: 780px) {
  .shell, .shell-wide { padding: 0 20px; }
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(1.3);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
}
.logo-mark {
  width: 30px; height: 30px;
  position: relative;
  display: inline-block;
}
.nav-links {
  display: flex;
  gap: 2px;
  font-size: 13px;
  font-weight: 500;
}
.nav-link {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--ink);
  opacity: 0.72;
  transition: all 0.25s cubic-bezier(.2,.8,.2,1);
}
.nav-link:hover { opacity: 1; background: rgba(244,243,241,0.06); }
.nav-link.active {
  opacity: 1;
  background: var(--crimson);
  color: var(--ink);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.25s;
  will-change: transform;
}
.nav-cta:hover { background: var(--crimson); color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
  white-space: nowrap;
  will-change: transform;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--crimson);
  color: var(--ink);
}
.btn-primary:hover { background: var(--crimson-deep); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { border-color: var(--crimson); color: var(--crimson); }
.btn .arrow {
  width: 14px; height: 14px;
  transition: transform 0.3s cubic-bezier(.2,.8,.2,1);
}
.btn:hover .arrow { transform: translate(4px, -4px); }

/* Sections */
section { position: relative; }
.section-pad { padding: 140px 0; }
.section-pad-sm { padding: 80px 0; }
@media (max-width: 780px) {
  .section-pad { padding: 80px 0; }
  .section-pad-sm { padding: 48px 0; }
}

.divider { height: 1px; background: var(--line); margin: 0; }

/* Surface variants */
.surface-dark {
  background: var(--bg-2);
  color: var(--ink);
}
.surface-dark .eyebrow { color: var(--ink-mute); }
.surface-dark .divider { background: var(--line); }

/* Grid utilities */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Placeholder imagery */
.ph {
  position: relative;
  background-color: var(--bg-3);
  background-image:
    repeating-linear-gradient(135deg, rgba(244,243,241,0.04) 0 1px, transparent 1px 14px);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ph-dark {
  background-color: var(--bg);
  background-image:
    repeating-linear-gradient(135deg, rgba(244,243,241,0.04) 0 1px, transparent 1px 14px);
}
.ph-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  padding: 4px 10px;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-radius: 999px;
  border: 1px solid var(--line);
}
.ph-dark .ph-label {
  background: color-mix(in srgb, var(--bg) 70%, transparent);
}

/* Card hover */
.card-hover { transition: transform 0.4s cubic-bezier(.2,.8,.2,1), border-color 0.4s; will-change: transform; }
.card-hover:hover { transform: translateY(-6px); border-color: var(--crimson) !important; }

/* Footer */
.footer {
  background: var(--bg-2);
  color: var(--ink);
  padding: 100px 0 40px;
  border-top: 1px solid var(--line);
}
.footer a { opacity: 0.7; transition: opacity 0.2s, color 0.2s; }
.footer a:hover { opacity: 1; color: var(--crimson); }

/* Marquee */
.marquee {
  overflow: hidden;
  position: relative;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.marquee-track {
  display: flex;
  gap: 64px;
  width: max-content;
  align-items: center;
  will-change: transform;
}
.marquee-item {
  font-family: var(--display);
  font-weight: 700;
  font-size: 36px;
  letter-spacing: -0.03em;
  color: var(--ink);
  opacity: 0.45;
  display: flex;
  align-items: center;
  gap: 64px;
  white-space: nowrap;
  transition: opacity 0.3s, color 0.3s;
}
.marquee-item:hover { opacity: 1; color: var(--crimson); }
.marquee-item::after {
  content: '✦';
  color: var(--crimson);
  font-size: 18px;
  opacity: 0.9;
}

/* Magnetic underline */
.m-link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
}
.m-link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform-origin: left;
  transform: scaleX(1);
  transition: transform 0.4s cubic-bezier(.2,.8,.2,1);
}
.m-link:hover::after { transform: scaleX(0); transform-origin: right; }

/* Chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(244,243,241,0.06);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}
.surface-dark .chip { background: rgba(244,243,241,0.06); }

/* Reveal (used as GSAP target) */
.reveal { will-change: transform, opacity; }

/* Hero grid ticks */
.tick-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 40%, transparent 85%);
  pointer-events: none;
}

/* Orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  pointer-events: none;
  will-change: transform;
}

/* Logo mark — forge hammer glyph (the signature file hammer) */
.hammer-glyph {
  display: inline-block;
  vertical-align: middle;
}

/* Curved red accent (inspired by signature card) */
.curve-accent {
  position: absolute;
  pointer-events: none;
  will-change: transform;
}

/* Atom glyph container */
.atom-stage {
  position: relative;
  width: 100%;
  max-width: 640px;
  aspect-ratio: 1;
  margin: 0 auto;
}
.atom-core {
  position: absolute;
  left: 50%; top: 50%;
  width: 14%; height: 14%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--crimson-glow), var(--crimson) 55%, var(--crimson-deep) 100%);
  box-shadow:
    0 0 60px var(--crimson),
    0 0 120px var(--crimson-deep),
    inset 0 0 30px rgba(0,0,0,0.5);
  z-index: 5;
}
.atom-halo {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(225,29,56,0.35), transparent 55%);
  filter: blur(10px);
  pointer-events: none;
}
.atom-orbit {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  transform-origin: center;
}
.atom-orbit svg { display: block; width: 100%; height: 100%; overflow: visible; }
.atom-electron {
  fill: var(--ink);
  stroke: var(--crimson);
  stroke-width: 1;
  filter: drop-shadow(0 0 8px var(--crimson));
}
.atom-ring { fill: none; stroke: var(--line); stroke-width: 1; }

/* Hero letter reveal — CHANGE-style broken grid */
.letter-stage { display: inline-block; position: relative; overflow: hidden; }
.letter-stage .letter-char {
  display: inline-block;
  will-change: transform, opacity;
}

/* Underline sweep on nav links */
.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  left: 16px; right: 16px;
  bottom: 6px;
  height: 1px;
  background: var(--crimson);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(.2,.8,.2,1);
}
.nav-link:hover:not(.active)::after { transform: scaleX(1); transform-origin: left; }

/* Tweaks panel */
.tweaks {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 280px;
  background: var(--bg-2);
  color: var(--ink);
  border-radius: 14px;
  padding: 16px;
  font-size: 12px;
  z-index: 100;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  border: 1px solid var(--line);
  display: none;
}
.tweaks.on { display: block; }
.tweaks h4 { margin: 0 0 10px; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.14em; font-size: 10px; opacity: 0.6; font-weight: 400; }
.tweaks-row { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--line); }
.tweaks-row:last-child { border: none; }
.tweaks label { opacity: 0.85; }
.tweaks select, .tweaks input[type="color"] {
  background: rgba(244,243,241,0.06);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  font-family: var(--mono);
  font-size: 11px;
}
.tweaks input[type="color"] { padding: 0; width: 32px; height: 24px; }
.tweaks input[type="checkbox"] { accent-color: var(--crimson); }

/* Ribbon curve bg — inspired by signature */
.curve-ribbon {
  position: absolute;
  pointer-events: none;
  opacity: 0.9;
}

/* Mobile nav */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.nav-burger span.burger-x:first-child { transform: translateY(7px) rotate(45deg); }
.nav-burger span.burger-x:last-child  { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 49;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}
.nav-mobile-panel {
  position: absolute;
  top: 72px;
  left: 0; right: 0;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  padding: 20px 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-mobile-link {
  padding: 14px 12px;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  opacity: 0.72;
  border-radius: 10px;
  transition: background 0.2s, opacity 0.2s;
}
.nav-mobile-link:hover,
.nav-mobile-link.active { opacity: 1; background: rgba(244,243,241,0.06); }
.nav-mobile-link.active { color: var(--crimson); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-cta-desktop { display: none; }
  .nav-burger { display: flex; }
  .stat-strip { grid-template-columns: repeat(2, 1fr) !important; }
  .stat-strip > div { border-top: 1px solid var(--line); }
  .stat-strip > div:nth-child(odd) { border-left: none !important; }
  .footer-grid { grid-template-columns: 1fr 1fr !important; }
  .svc-grid { grid-template-columns: 1fr !important; }
}

/* Hover card reveal — used on service rows */
.row-link { position: relative; overflow: hidden; }
.row-link .row-fill {
  position: absolute;
  left: 0; right: 0; top: 100%;
  height: 100%;
  background: var(--crimson);
  transition: top 0.45s cubic-bezier(.2,.8,.2,1);
  z-index: 0;
}
.row-link:hover .row-fill { top: 0; }
.row-link > *:not(.row-fill) { position: relative; z-index: 1; }