/* =========================================================================
   Vongoid — styles.css
   Engineering monograph aesthetic. Paper background, ink, one accent.
   ========================================================================= */

/* Tokens ---------------------------------------------------------------- */
:root {
  --bg:        #f1ede4;
  --bg-alt:    #ebe5d6;
  --bg-deep:   #e2dccb;
  --ink:       #15171c;
  --ink-2:     #3d3a35;
  --ink-3:     #76706a;
  --ink-4:     #a39c92;
  --rule:      #d6cfbf;
  --rule-soft: #e3dccc;
  --paper:     rgba(21, 23, 28, 0.025);
  --grid:      rgba(21, 23, 28, 0.045);
  --accent:    #b8421a;     /* terracotta */
  --accent-2:  #1c3b32;     /* deep teal, for technical diagrams */
  --teal:      #234d44;
  --teal-bg:   rgba(35, 77, 68, 0.05);

  --serif:     'Fraunces', 'Iowan Old Style', 'Charter', 'Georgia', serif;
  --display:   'Orbitron', 'Helvetica Neue', 'Arial', sans-serif;
  --mono:      'JetBrains Mono', 'Menlo', 'Consolas', monospace;

  --max:       1320px;
  --gutter:    clamp(20px, 4vw, 56px);
  --section:   clamp(96px, 14vh, 160px);
}

/* Reset ----------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1, 'ss01' 1, 'ss02' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* paper grain — extremely subtle, fixed to viewport */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='3'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.045 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
  opacity: 0.9;
}
/* very subtle paper grid behind the page */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right,  var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.7), transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.7), transparent 80%);
}

img, svg { display: block; max-width: 100%; }
svg { height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, blockquote, dl, dd { margin: 0; }
button { font: inherit; }

.skip {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--bg);
  padding: 8px 12px; z-index: 99;
}
.skip:focus { left: 16px; top: 16px; }

/* Selection */
::selection { background: var(--ink); color: var(--bg); }

/* Topbar ---------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(241, 237, 228, 0.88);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
}
.topbar__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand img {
  width: 138px; height: auto; display: block;
}
.nav {
  display: flex; justify-content: center; gap: 28px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.nav a {
  position: relative;
  padding: 6px 0;
  transition: color 200ms ease;
}
.nav a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--ink);
  transition: right 280ms cubic-bezier(.6,.05,.2,1);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { right: 0; }
.topbar__actions {
  display: flex;
  align-items: center;
  gap: 18px;
}
.topbar__rule {
  height: 1px;
  background: var(--rule);
}

/* Language toggle ------------------------------------------------------- */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--display);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  user-select: none;
}
.lang-toggle__btn {
  background: none;
  border: none;
  padding: 6px 2px;
  margin: 0;
  font: inherit;
  color: var(--ink-3);
  cursor: pointer;
  letter-spacing: inherit;
  text-transform: inherit;
  position: relative;
  transition: color 200ms ease;
}
.lang-toggle__btn:hover { color: var(--ink-2); }
.lang-toggle__btn.is-active {
  color: var(--ink);
}
.lang-toggle__btn.is-active::after {
  content: '';
  position: absolute;
  left: 2px; right: 2px; bottom: 0;
  height: 1px;
  background: var(--ink);
}
.lang-toggle__sep {
  color: var(--ink-4);
  font-size: 11px;
  font-weight: 400;
  line-height: 1;
}

/* CTA (shared) ---------------------------------------------------------- */
.cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background 200ms ease, color 200ms ease, transform 200ms ease;
  white-space: nowrap;
}
.cta svg { transition: transform 200ms ease; }
.cta:hover { background: var(--ink); color: var(--bg); }
.cta:hover svg { transform: translateX(3px); }

.cta--ghost {
  border-color: var(--ink-3);
  color: var(--ink-2);
}
.cta--ghost:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.cta--primary { background: var(--ink); color: var(--bg); }
.cta--primary:hover { background: var(--accent); border-color: var(--accent); }

.cta--text {
  border: none; padding: 12px 0;
  position: relative;
}
.cta--text::before {
  content: ''; position: absolute; left: 0; right: 0; bottom: 8px;
  height: 1px; background: var(--ink);
  transform-origin: right;
  transition: transform 320ms cubic-bezier(.7,0,.2,1);
}
.cta--text:hover { background: transparent; color: var(--ink); }
.cta--text:hover::before { transform: scaleX(0); transform-origin: right; }
.cta--text:hover svg { transform: translateX(3px); }

/* Hero ------------------------------------------------------------------ */
.hero {
  position: relative; z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(56px, 8vw, 110px) var(--gutter) clamp(80px, 12vw, 140px);
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
.hero__left { min-width: 0; }
.hero__diagram { min-width: 0; position: sticky; top: 100px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: clamp(28px, 4vw, 44px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  width: 100%;
}
.eyebrow .dot {
  width: 6px; height: 6px; background: var(--accent);
  display: inline-block; flex: none;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(0.7); }
}

.display {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(40px, 6.2vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: clamp(28px, 3.5vw, 40px);
  text-wrap: balance;
}
.display em, .display i { font-style: italic; }
.display__period { color: var(--accent); }

.lede {
  font-family: var(--serif);
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.45;
  color: var(--ink-2);
  max-width: 38em;
  margin-bottom: clamp(32px, 4vw, 44px);
  text-wrap: pretty;
}

.cta-row {
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap;
  margin-bottom: clamp(48px, 6vw, 72px);
}

.meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  max-width: 540px;
}
.meta div { display: flex; flex-direction: column; gap: 4px; }
.meta dt {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.meta dd {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-2);
}

/* Diagram (hero) -------------------------------------------------------- */
.diagram {
  border: 1px solid var(--rule);
  background: var(--bg);
  position: relative;
}
.diagram::before, .diagram::after {
  content: ''; position: absolute; width: 14px; height: 14px;
  border: 1px solid var(--ink);
  background: var(--bg);
}
.diagram::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.diagram::after  { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.diagram__chrome {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-2);
  background: var(--bg-alt);
}
.diagram__title { display: flex; gap: 14px; align-items: center; }
.diagram__id { font-family: var(--display); letter-spacing: 0.18em; color: var(--ink-3); }
.diagram__meta { display: flex; gap: 14px; align-items: center; }
.diagram__live { display: inline-flex; align-items: center; gap: 6px; }
.pulse {
  width: 6px; height: 6px; background: var(--accent);
  display: inline-block; border-radius: 0;
  animation: pulse 2.4s ease-in-out infinite;
}
.diagram__svg {
  width: 100%; height: auto; display: block;
  color: var(--ink-4);
}
.diagram__foot {
  display: flex; gap: 8px;
  padding: 8px 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-3);
  background: var(--bg-alt);
}

/* diagram svg internals */
.diagram__svg .grid rect { color: var(--ink-4); }
.diagram__svg .layer rect {
  fill: var(--bg);
  stroke: var(--ink-2);
  stroke-width: 0.9;
}
.diagram__svg .layer--gw rect { fill: var(--ink); stroke: var(--ink); }
.diagram__svg .layer--gw .lbl { fill: var(--bg); }
.diagram__svg .layer--gw .lbl-sub { fill: rgba(241,237,228,0.6); }
.diagram__svg .layer--mesh rect { fill: var(--teal-bg); stroke: var(--teal); }
.diagram__svg .layer--mesh .lbl { fill: var(--teal); }
.diagram__svg .layer--mesh .lbl-sub { fill: var(--teal); }
.diagram__svg .layer--obs rect { fill: var(--bg-alt); stroke: var(--ink-2); stroke-dasharray: 3 3; }
.diagram__svg .layer .lbl {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  fill: var(--ink);
  text-anchor: middle;
  letter-spacing: 0.02em;
}
.diagram__svg .layer .lbl--start { text-anchor: start; }
.diagram__svg .layer .lbl-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8.5px;
  fill: var(--ink-3);
  text-anchor: middle;
}
.diagram__svg .conn line,
.diagram__svg .conn path {
  stroke: var(--ink-3);
  stroke-width: 0.9;
  fill: none;
}
.diagram__svg .conn--loop path {
  stroke: var(--accent);
  stroke-dasharray: 3 3;
  opacity: 0.7;
}
.diagram__svg .ticks path {
  stroke: var(--ink);
  stroke-width: 1.4;
  fill: none;
  stroke-linecap: square;
}

/* ticker / marquee ------------------------------------------------------ */
.ticker {
  position: relative; z-index: 1;
  overflow: hidden;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  padding: 18px 0;
  margin-bottom: var(--section);
}
.ticker__track {
  display: flex; gap: 32px; align-items: center;
  white-space: nowrap;
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
  animation: ticker 60s linear infinite;
  width: max-content;
}
.ticker__dot { color: var(--accent); font-size: 8px; }
@keyframes ticker {
  to { transform: translateX(-50%); }
}

/* Section head --------------------------------------------------------- */
.section-head {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(40px, 6vw, 72px);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  align-items: start;
}
.section-head--inline { padding-bottom: 28px; align-items: baseline; }
.section-head__num {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  padding-top: 14px;
  position: relative;
}
.section-head__num::before {
  content: ''; position: absolute; top: 0; left: 0; width: 24px; height: 1px;
  background: var(--ink);
}
.section-head__title h2,
.stance__kicker {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(36px, 4.6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.022em;
  color: var(--ink);
  text-wrap: balance;
}
.section-head__title p {
  font-size: clamp(16px, 1.3vw, 19px);
  color: var(--ink-3);
  margin-top: 16px;
  max-width: 36em;
  line-height: 1.5;
  text-wrap: pretty;
}

/* Capabilities --------------------------------------------------------- */
.caps {
  position: relative; z-index: 1;
  margin-bottom: var(--section);
}
.caps__grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.card {
  position: relative;
  background: var(--bg);
  padding: 32px 28px 36px;
  display: flex; flex-direction: column;
  transition: background 320ms ease;
}
.card:hover { background: var(--bg-alt); }
.card__num {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
  margin-bottom: 18px;
}
.card__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin-bottom: 14px;
  text-wrap: balance;
}
.card p {
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 24px;
  text-wrap: pretty;
}
.card__diagram {
  margin-top: auto;
  border-top: 1px solid var(--rule-soft);
  padding-top: 20px;
  width: 100%; height: auto;
}
.card__diagram .d-frame { fill: none; stroke: var(--ink-3); stroke-width: 0.7; stroke-dasharray: 4 3; }
.card__diagram .d-line { stroke: var(--ink-3); stroke-width: 0.8; }
.card__diagram .d-box { fill: var(--bg); stroke: var(--ink-2); stroke-width: 0.8; }
.card__diagram .d-box--alt { fill: var(--bg-deep); stroke: var(--ink-3); }
.card__diagram .d-box--public { fill: var(--bg-alt); }
.card__diagram .d-box--private { fill: var(--ink); }
.card__diagram .d-box--private + .d-lbl,
.card__diagram .d-box--private + text + .d-lbl { fill: var(--bg); }
.card__diagram .d-pipe { fill: var(--ink); stroke: var(--ink); stroke-width: 0.8; }
.card__diagram .d-core { fill: var(--ink); stroke: var(--ink); }
.card__diagram .d-lbl {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8.5px;
  fill: var(--ink);
  letter-spacing: 0.02em;
}
.card__diagram .d-lbl--inv { fill: var(--bg); }
.card__diagram .d-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 7.5px;
  fill: var(--ink-3);
  letter-spacing: 0.02em;
}
.card__diagram .d-tick {
  font-family: 'Orbitron', sans-serif;
  font-size: 7px;
  fill: var(--ink-3);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.card__diagram .d-lbl-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8px;
  fill: var(--ink-2);
}

/* Stance --------------------------------------------------------------- */
.stance {
  position: relative; z-index: 1;
  background: var(--bg-alt);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: var(--section) 0;
  margin-bottom: var(--section);
}
.stance__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.pull {
  max-width: 32em;
  margin: 0 0 80px;
  font-family: var(--serif);
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.018em;
  color: var(--ink);
  font-weight: 380;
  text-wrap: balance;
}
.pull p { margin-bottom: 0.4em; }
.pull p:last-child { margin-bottom: 0; }
.pull em { font-style: italic; color: var(--accent); }

.tenets {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  padding-top: 32px;
  max-width: 100%;
}
.tenets li {
  display: flex; flex-direction: column; gap: 12px;
  padding: 0 20px 0 0;
  border-right: 1px dashed var(--rule);
  margin-right: 20px;
}
.tenets li:last-child { border-right: none; margin-right: 0; padding-right: 0; }
.tenets__num {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.tenets h4 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.005em;
  color: var(--ink);
  line-height: 1.2;
}
.tenets p {
  font-size: 14px;
  color: var(--ink-3);
  line-height: 1.5;
}

/* Method --------------------------------------------------------------- */
.method {
  position: relative; z-index: 1;
  max-width: var(--max);
  margin: 0 auto var(--section);
  padding: 0 var(--gutter);
}
.phases {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  position: relative;
}
.phases::before {
  content: ''; position: absolute; top: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(to right, var(--ink) 0%, var(--ink) 20%, var(--ink) 100%);
}
.phase {
  position: relative;
  padding: 28px 22px 28px 0;
  border-right: 1px solid var(--rule);
  margin-right: 22px;
  display: flex; flex-direction: column; gap: 12px;
}
.phase:last-child { border-right: none; margin-right: 0; padding-right: 0; }
.phase__rail {
  position: absolute; top: -5px; left: 0; width: 9px; height: 9px;
  background: var(--bg); border: 1px solid var(--ink);
  z-index: 1;
}
.phase--last .phase__rail { background: var(--accent); border-color: var(--accent); }
.phase__num {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
  margin-top: 16px;
}
.phase h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 26px;
  line-height: 1.05;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.phase p {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink-2);
  text-wrap: pretty;
}
.phase__out {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  padding-top: 16px;
  border-top: 1px solid var(--rule-soft);
  letter-spacing: 0.01em;
}

/* Stack ---------------------------------------------------------------- */
.stack {
  position: relative; z-index: 1;
  max-width: var(--max);
  margin: 0 auto var(--section);
  padding: 0 var(--gutter);
}
.stack__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}
.stack__col {
  padding: 32px 28px 36px 0;
  border-right: 1px dashed var(--rule);
  margin-right: 28px;
}
.stack__col:nth-child(4n) { border-right: none; margin-right: 0; padding-right: 0; }
.stack__h {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  font-weight: 500;
}
.stack__list {
  display: flex; flex-direction: column; gap: 8px;
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.stack__list li {
  position: relative; padding-left: 16px;
  transition: color 200ms ease;
}
.stack__list li::before {
  content: '·'; position: absolute; left: 0; color: var(--ink-4);
}
.stack__list li:hover { color: var(--accent); }

/* Contact -------------------------------------------------------------- */
.contact {
  position: relative; z-index: 1;
  background: var(--ink);
  color: var(--bg);
  padding: var(--section) 0;
  margin-bottom: 0;
}
.contact__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.contact .section-head__num { color: rgba(241,237,228,0.5); }
.contact .section-head__num::before { background: var(--bg); }
.contact .stance__kicker { color: var(--bg); }
.contact__h {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(40px, 5.5vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.022em;
  margin: 24px 0 28px;
  max-width: 12em;
  text-wrap: balance;
}
.contact__p {
  font-size: clamp(16px, 1.4vw, 19px);
  color: rgba(241, 237, 228, 0.7);
  max-width: 38em;
  margin-bottom: 48px;
  line-height: 1.5;
  text-wrap: pretty;
}
.contact__row { margin-bottom: 28px; }
.email {
  display: inline-flex; align-items: center; gap: 22px;
  padding: 24px 0;
  border-top: 1px solid rgba(241,237,228,0.2);
  border-bottom: 1px solid rgba(241,237,228,0.2);
  width: 100%;
  max-width: 720px;
  color: var(--bg);
  transition: gap 320ms cubic-bezier(.6,.05,.2,1);
}
.email:hover { gap: 32px; }
.email__label {
  font-family: var(--display);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(241, 237, 228, 0.55);
  min-width: 110px;
}
.email__addr {
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 36px);
  letter-spacing: -0.01em;
  color: var(--bg);
  flex: 1;
  font-weight: 400;
}
.email__arrow { color: var(--accent); }
.email:hover .email__arrow { transform: translateX(4px); transition: transform 320ms ease; }

.contact__small {
  font-size: 14px;
  color: rgba(241, 237, 228, 0.5);
  max-width: 38em;
  font-style: italic;
  font-family: var(--serif);
}

/* Footer --------------------------------------------------------------- */
.foot {
  position: relative; z-index: 1;
  border-top: 1px solid var(--rule);
  padding: 32px 0;
  background: var(--bg);
}
.foot__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
}
.foot__logo { width: 110px; opacity: 0.85; }
.foot__meta,
.foot__colophon {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
}
.foot__meta { justify-content: center; }
.foot__colophon { justify-self: end; }
.foot__sep { color: var(--ink-4); }
.foot__meta a:hover { color: var(--accent); }

/* Reveal on scroll ----------------------------------------------------- */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 800ms ease, transform 800ms cubic-bezier(.2,.6,.2,1);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }
.reveal[data-delay="5"] { transition-delay: 400ms; }

/* Responsive ----------------------------------------------------------- */
@media (max-width: 1080px) {
  .nav { display: none; }
  .topbar__inner { grid-template-columns: 1fr auto; }
  .topbar__actions { gap: 14px; }
  .hero__grid { grid-template-columns: 1fr; }
  .hero__diagram { position: static; }
  .caps__grid { grid-template-columns: repeat(2, 1fr); }
  .tenets { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .tenets li { border-right: none; padding-right: 0; margin-right: 0; padding-bottom: 28px; border-bottom: 1px dashed var(--rule); }
  .tenets li:nth-child(2n) { border-bottom: none; padding-bottom: 0; }
  .tenets li:nth-child(2n+1) { padding-right: 20px; border-right: 1px dashed var(--rule); }
  .tenets li:nth-child(2n) { padding-left: 20px; }
  .phases { grid-template-columns: 1fr; }
  .phase { border-right: none; border-bottom: 1px solid var(--rule); margin-right: 0; padding: 24px 0; }
  .phase:last-child { border-bottom: none; }
  .phase__rail { display: none; }
  .stack__grid { grid-template-columns: repeat(2, 1fr); }
  .stack__col:nth-child(4n) { border-right: 1px dashed var(--rule); margin-right: 28px; padding-right: 28px; }
  .stack__col:nth-child(2n) { border-right: none; margin-right: 0; padding-right: 0; }
  .foot__inner { grid-template-columns: 1fr; gap: 16px; text-align: center; justify-items: center; }
  .foot__meta, .foot__colophon { justify-content: center; justify-self: center; }
}

@media (max-width: 640px) {
  .topbar__inner { padding: 14px var(--gutter); }
  .topbar__inner .cta--ghost { display: none; }
  .brand img { width: 116px; }
  .lang-toggle { font-size: 10px; gap: 4px; }
  .lang-toggle__btn { padding: 6px 1px; }
  .meta { grid-template-columns: 1fr; gap: 14px; }
  .caps__grid { grid-template-columns: 1fr; }
  .tenets { grid-template-columns: 1fr; }
  .tenets li { border-right: none !important; padding-left: 0 !important; padding-right: 0 !important; border-bottom: 1px dashed var(--rule); }
  .tenets li:last-child { border-bottom: none; }
  .stack__grid { grid-template-columns: 1fr; }
  .stack__col { border-right: none !important; margin-right: 0 !important; padding-right: 0 !important; border-bottom: 1px dashed var(--rule); }
  .stack__col:last-child { border-bottom: none; }
  .email { flex-direction: column; align-items: flex-start; gap: 8px; }
  .email__arrow { align-self: flex-end; }
  .email:hover { gap: 8px; }
  .diagram__title { flex-direction: column; align-items: flex-start; gap: 4px; }
  .diagram__meta { gap: 8px; font-size: 10px; }
  .hero { padding-top: 56px; }
  .section-head { grid-template-columns: 1fr; gap: 12px; }
  .section-head__num { padding-top: 0; }
  .section-head__num::before { display: none; }
}

/* Focus styles --------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}