/* ============================================================
   Rax Systems — design tokens + full component vocabulary
   Defense-tech minimal: charcoal base, off-white text,
   one steel-blue accent. Space Grotesk + JetBrains Mono.
   Single stylesheet for the whole site (home + 4 inner pages).
   ============================================================ */

:root {
  /* ---- base surfaces ---- */
  --bg:        #0c0e10;            /* near-black charcoal */
  --bg-2:      #14171a;            /* slightly raised panel */
  --bg-3:      #1b1f23;            /* hover / deepest raise */
  --line:      rgba(255,255,255,.08);   /* hairline border */
  --line-2:    rgba(255,255,255,.14);   /* stronger hairline */

  /* ---- text ---- */
  --fg:        #e7eaec;            /* off-white */
  --fg-dim:    #8b9298;            /* muted */
  --fg-faint:  #5a6065;           /* faintest meta */

  /* ---- accent: steel blue ---- */
  --accent:        #4a8fc7;
  --accent-bright: #6fb0e6;
  --accent-soft:   rgba(74,143,199,.12);
  --accent-line:   rgba(74,143,199,.32);

  /* ---- geometry ---- */
  --r:     6px;
  --wrap:  1120px;

  /* ---- spacing scale ---- */
  --sp-1: .5rem;
  --sp-2: .85rem;
  --sp-3: 1.25rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 5rem;
  --pad:       clamp(20px, 5vw, 40px);
  --section-y: clamp(60px, 9vw, 116px);
  --header-h:  68px;

  /* ---- font-size scale ---- */
  --fs-eyebrow: .74rem;
  --fs-meta:    .8rem;
  --fs-body:    1.04rem;
  --fs-lead:    clamp(1.05rem, 1.8vw, 1.28rem);
  --fs-h-lg:    clamp(1.5rem, 3.2vw, 2.2rem);
  --fs-h-xl:    clamp(1.9rem, 4.4vw, 3rem);
  --fs-display: clamp(2.5rem, 7vw, 4.6rem);

  /* ---- type families ---- */
  --font-sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; border-radius: 2px; }

/* ============================================================
   Layout
   ============================================================ */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: var(--section-y); position: relative; }
.section + .section { border-top: 1px solid var(--line); }
.section--alt { background: var(--bg-2); }
.section--tight { padding-block: clamp(44px, 7vw, 80px); }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.6rem); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

/* a section heading block used across pages */
.shead { max-width: 64ch; margin-bottom: clamp(2rem, 4vw, 3.2rem); }
.shead--split {
  display: flex; justify-content: space-between; align-items: flex-end;
  gap: 1.5rem; flex-wrap: wrap; max-width: none;
}

/* ============================================================
   Typographic helpers
   ============================================================ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: var(--fs-eyebrow);
  color: var(--accent);
  margin: 0 0 1.1rem;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--accent);
  flex: none;
}

.index {
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: var(--fs-eyebrow);
  color: var(--fg-dim);
}
.index .accent { color: var(--accent); }

.display {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-display);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 0;
}
.display .ln { display: block; }

.h-xl {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-h-xl);
  line-height: 1.08;
  letter-spacing: -.015em;
  margin: 0;
}
.h-lg {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-h-lg);
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 0;
}

.accent { color: var(--accent); }

.lead { font-size: var(--fs-lead); color: var(--fg-dim); margin: 0; }

.prose { color: var(--fg-dim); max-width: 64ch; }
.prose p { margin: 0 0 1.1rem; }
.prose p:first-child { color: var(--fg); }
.prose p:last-child { margin-bottom: 0; }
.prose a:not(.btn) { color: var(--accent); border-bottom: 1px solid var(--accent-line); }
.prose a:not(.btn):hover { color: var(--accent-bright); border-color: var(--accent-bright); }

.muted { color: var(--fg-dim); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .8rem 1.4rem;
  border-radius: var(--r);
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s var(--ease), border-color .2s var(--ease),
              color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:hover .arr { transform: translateX(4px); }
.btn:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; }

.btn--solid {
  background: var(--accent);
  color: #06131f;
  border-color: var(--accent);
}
.btn--solid:hover { background: var(--accent-bright); border-color: var(--accent-bright); }

.btn--ghost {
  background: transparent;
  border-color: var(--line-2);
  color: var(--fg);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-bright); background: var(--accent-soft); }

.btn--accent {
  background: transparent;
  border-color: var(--accent);
  color: var(--accent-bright);
}
.btn--accent:hover { background: var(--accent-soft); }

.btn--lg { padding: .95rem 1.7rem; font-size: .86rem; }
.btn--sm { padding: .55rem 1rem; font-size: .76rem; }

.arr { display: inline-block; transition: transform .2s var(--ease); }

/* ============================================================
   Header / nav
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12,14,16,.86);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: .7rem; line-height: 1; }
.brand__name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: .14em;
  color: var(--fg);
}
.brand__sub {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .62rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--accent);
}
/* mark drawn in CSS so no binary asset is required */
.brand__mark {
  width: 26px; height: 26px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  position: relative;
  flex: none;
  background: var(--accent-soft);
}
.brand__mark::before,
.brand__mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
}
.brand__mark::before { left: 50%; top: 4px; bottom: 4px; width: 1px; transform: translateX(-.5px); }
.brand__mark::after  { top: 50%; left: 4px; right: 4px; height: 1px; transform: translateY(-.5px); }

.nav {
  display: flex;
  align-items: center;
  gap: 1.7rem;
  margin-left: auto;
}
.nav > a:not(.btn) {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--fg-dim);
  position: relative;
  padding: 4px 0;
  transition: color .2s var(--ease);
}
.nav > a:not(.btn)::after {
  content: "";
  position: absolute; left: 0; bottom: -3px;
  width: 0; height: 1px; background: var(--accent);
  transition: width .25s var(--ease);
}
.nav > a:not(.btn):hover { color: var(--fg); }
.nav > a:not(.btn):hover::after { width: 100%; }
.nav > a[aria-current="page"] { color: var(--fg); }
.nav > a[aria-current="page"]::after { width: 100%; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  height: 1.5px; width: 18px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding-block: clamp(64px, 12vw, 150px);
  border-bottom: 1px solid var(--line);
}
/* faint technical grid + crosshair texture, CSS only */
.hero::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 10%, #000 30%, transparent 80%);
          mask-image: radial-gradient(120% 90% at 70% 10%, #000 30%, transparent 80%);
  opacity: .5;
}
.hero::after {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background: radial-gradient(80% 60% at 78% 0%, var(--accent-soft) 0%, transparent 60%);
}
.hero__inner { position: relative; max-width: 880px; }
.hero__sub {
  font-size: var(--fs-lead);
  color: var(--fg-dim);
  max-width: 56ch;
  margin: 1.4rem 0 2rem;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .9rem; }

/* ============================================================
   Stats
   ============================================================ */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.5rem, 5vw, 3.5rem);
  margin-top: clamp(2.4rem, 5vw, 3.6rem);
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.stat { min-width: 90px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  color: var(--fg);
  line-height: 1;
  letter-spacing: -.01em;
}
.stat__num .accent { color: var(--accent); }
.stat__lab {
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--fg-dim);
  margin-top: .6rem;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: clamp(1.4rem, 2.6vw, 1.9rem);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
a.card:hover, .card--link:hover {
  border-color: var(--accent-line);
  background: var(--bg-3);
  transform: translateY(-2px);
}
.card__index {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--accent);
  text-transform: uppercase;
}
.card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -.01em;
  color: var(--fg);
  margin: 0;
}
.card__body { color: var(--fg-dim); margin: 0; font-size: .98rem; }
.card__meta {
  margin-top: auto;
  padding-top: .4rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}
a.card:hover .arr, .card--link:hover .arr { transform: translateX(4px); }

.tag-row { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .3rem; }
.tag {
  font-family: var(--font-mono);
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--fg-dim);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: .25rem .65rem;
  line-height: 1;
}

/* ============================================================
   Process steps
   ============================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}
.step {
  background: var(--bg-2);
  padding: clamp(1.3rem, 2.4vw, 1.8rem);
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.step__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .12em;
  color: var(--accent);
}
.step__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.08rem;
  color: var(--fg);
  margin: 0;
}
.step__body { color: var(--fg-dim); font-size: .92rem; margin: 0; }

/* ============================================================
   Work grid + lightbox
   ============================================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1rem, 2.4vw, 1.6rem);
}
.work-item {
  display: flex;
  flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.work-item:hover { border-color: var(--accent-line); transform: translateY(-2px); }
.work-item__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, var(--bg-3) 0%, var(--bg-2) 100%);
  border-bottom: 1px solid var(--line);
  cursor: zoom-in;
  overflow: hidden;
}
/* abstract CSS visual so the tile reads as intentional with no image file */
.work-item__media::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .6;
}
.work-item__media::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 30% 20%, var(--accent-soft), transparent 70%);
}
.work-item__media img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.work-item:hover .work-item__media img { transform: scale(1.04); }
.work-item__glyph {
  position: absolute;
  left: 18px; bottom: 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  z-index: 1;
}
.work-item__body {
  padding: clamp(1.2rem, 2.2vw, 1.6rem);
  display: flex;
  flex-direction: column;
  gap: .7rem;
}
.work-item__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.16rem;
  color: var(--fg);
  margin: 0;
}
.work-item__type {
  font-family: var(--font-mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
}
.work-item__desc { color: var(--fg-dim); font-size: .96rem; margin: 0; }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(7,9,11,.94);
  display: none;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
}
.lightbox.is-open { display: flex; }
.lightbox__panel {
  position: relative;
  max-width: min(92vw, 940px);
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  overflow: hidden;
}
.lightbox__media {
  aspect-ratio: 16 / 9;
  position: relative;
  background:
    linear-gradient(135deg, var(--bg-3), var(--bg-2));
}
.lightbox__media::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .6;
}
.lightbox__media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.lightbox__body { padding: 1.4rem 1.6rem; }
.lightbox__title { font-family: var(--font-sans); font-weight: 600; font-size: 1.2rem; margin: 0 0 .4rem; }
.lightbox__desc { color: var(--fg-dim); margin: 0; font-size: .98rem; }
.lightbox__close {
  position: absolute;
  top: 12px; right: 12px;
  z-index: 2;
  width: 40px; height: 40px;
  border-radius: var(--r);
  background: rgba(12,14,16,.7);
  border: 1px solid var(--line-2);
  color: var(--fg);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.lightbox__close:hover { background: var(--accent); border-color: var(--accent); color: #06131f; }

/* ============================================================
   Forms
   ============================================================ */
.form {
  display: grid;
  gap: 1.2rem;
  max-width: 620px;
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field { display: flex; flex-direction: column; gap: .5rem; }
.field--full { grid-column: 1 / -1; }
.field__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--fg-dim);
}
.field__label .req { color: var(--accent); }
.field input,
.field select,
.field textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--fg);
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  padding: .8rem .9rem;
  width: 100%;
  transition: border-color .2s var(--ease), background .2s var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.field textarea { min-height: 150px; resize: vertical; line-height: 1.55; }
.field select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--fg-dim) 50%),
    linear-gradient(135deg, var(--fg-dim) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 2px),
    calc(100% - 13px) calc(50% - 2px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2.4rem;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--fg-faint); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-3);
}
.field input:user-invalid,
.field textarea:user-invalid,
.field select:user-invalid { border-color: #c75a4a; }

.form__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.form__status {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .03em;
  margin: 0;
  min-height: 1.2em;
}
.form__status[data-state="loading"] { color: var(--fg-dim); }
.form__status[data-state="success"] { color: var(--accent-bright); }
.form__status[data-state="error"]   { color: #d8796a; }

.form__fallback { font-size: .92rem; color: var(--fg-dim); margin: 1.2rem 0 0; }
.form__fallback a { color: var(--accent); border-bottom: 1px solid var(--accent-line); }
.form__fallback a:hover { color: var(--accent-bright); }

/* ============================================================
   CTA strip
   ============================================================ */
.cta {
  text-align: center;
  max-width: 56ch;
  margin-inline: auto;
}
.cta .eyebrow { justify-content: center; }
.cta__btns { display: flex; flex-wrap: wrap; gap: .9rem; justify-content: center; margin-top: 1.8rem; }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  padding-block: clamp(46px, 6vw, 72px);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .72rem;
  color: var(--accent);
  margin: 0 0 1rem;
}
.footer__col--brand .brand { margin-bottom: 1rem; }
.footer__blurb { color: var(--fg-dim); max-width: 38ch; margin: 0; font-size: .96rem; }
.footer__col a,
.footer__col p { display: block; color: var(--fg-dim); margin: 0 0 .55rem; font-size: .94rem; }
.footer__col a { transition: color .2s var(--ease); }
.footer__col a:hover { color: var(--fg); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.6rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--fg-faint);
}

/* ============================================================
   Reveal animation
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .work-item:hover { transform: none; }
  * { scroll-behavior: auto !important; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 920px) {
  .grid--3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__col--brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; order: 2; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: .5rem var(--pad) 1.4rem;
    margin: 0;
    transform: translateY(-130%);
    transition: transform .3s var(--ease);
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); }
  .nav > a:not(.btn) {
    padding: 1rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }
  .nav > a:not(.btn)::after { display: none; }
  .nav .btn { margin-top: 1rem; justify-content: center; }

  .grid--2 { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .shead--split { align-items: flex-start; }
  .footer__inner { grid-template-columns: 1fr; gap: 1.8rem; }
}

@media (max-width: 400px) {
  .steps { grid-template-columns: 1fr; }
  .brand__sub { letter-spacing: .2em; }
}