/* ============================================================
   ZTNSS.COM — Zero Trust Network Security Solutions
   style.css — Single Shared Stylesheet
   All pages link to this one file.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;600;700;900&family=Share+Tech+Mono&family=Rajdhani:wght@400;500;600;700&display=swap');

/* ── DESIGN TOKENS ── */
:root {
  --gold:       #C9A84C;
  --gold-light: #E8C96A;
  --gold-dark:  #8B6914;
  --cyan:       #00D4FF;
  --cyan-dim:   #007A99;
  --red:        #CC2200;
  --dark:       #080810;
  --dark2:      #0d0d1a;
  --dark3:      #111122;
  --steel:      #1a1a2e;
  --white:      #F0F0F0;
  --gray:       #999;
  --muted:      #555;
  --max:        1200px;
  --mono:       'Share Tech Mono', monospace;
  --head:       'Orbitron', monospace;
  --body:       'Rajdhani', sans-serif;
}

/* ── RESET ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--dark);
  color: var(--white);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ============================================================
   NAVIGATION  (sits ABOVE the header image)
   Desktop  : full horizontal bar, all links visible
   Tablet   : compressed font + padding; wraps to 2 rows if needed
   Mobile   : hamburger only — all links in slide-down drawer
   ============================================================ */
.site-nav {
  background: linear-gradient(180deg, #000 0%, #05050e 100%);
  border-bottom: 2px solid var(--gold-dark);
  position: sticky;
  top: 0;
  z-index: 500;
  box-shadow: 0 4px 24px rgba(0,0,0,.9);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  flex-wrap: nowrap;
}

/* ── Logo ── */
.nav-logo {
  font-family: var(--head);
  font-size: .78rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: .04em;
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: 10px;
}
.nav-logo span { color: var(--cyan); }

/* ── Desktop link list ── */
.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;          /* allows wrap on mid-sizes */
  gap: 0;
  flex: 1;
  justify-content: flex-end;
}
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 3px;
  font-family: var(--head);
  font-size: .52rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: 0 8px;
  height: 48px;
  border-right: 1px solid rgba(201,168,76,.12);
  transition: background .2s, color .2s;
  white-space: nowrap;
}
.nav-links > li > a:hover,
.nav-links > li > a.active {
  background: rgba(201,168,76,.12);
  color: var(--gold-light);
}
.nav-links > li > a.active {
  border-bottom: 2px solid var(--cyan);
  color: var(--cyan);
}

/* Caret */
.nav-links > li > a .caret {
  font-size: .4rem;
  opacity: .55;
  transition: transform .2s;
}
.nav-links > li:hover > a .caret { transform: rotate(180deg); }

/* CTA button */
.nav-cta > a {
  background: var(--gold) !important;
  color: #000 !important;
  font-weight: 900 !important;
  border-radius: 2px;
  padding: 0 10px !important;
  border-right: none !important;
  margin-left: 4px;
}
.nav-cta > a:hover { background: var(--gold-light) !important; }

/* ── Dropdown ── */
.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: #08080f;
  border: 1px solid rgba(201,168,76,.25);
  border-top: 2px solid var(--gold);
  box-shadow: 0 12px 40px rgba(0,0,0,.85);
  z-index: 600;
}
.nav-links > li:hover .dropdown { display: block; }
.dropdown li a {
  display: block;
  font-family: var(--body);
  font-size: .8rem;
  font-weight: 600;
  color: #bbb;
  text-transform: uppercase;
  letter-spacing: .03em;
  padding: 9px 14px;
  border-bottom: 1px solid rgba(255,255,255,.04);
  transition: all .15s;
}
.dropdown li a:hover {
  background: rgba(201,168,76,.08);
  color: var(--gold);
  padding-left: 20px;
}

/* ── Hamburger button (hidden on desktop) ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
  transition: all .3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ── Mobile drawer ── */
.mobile-nav {
  display: none;
  background: #05050e;
  border-top: 1px solid rgba(201,168,76,.18);
  padding: 6px 0 14px;
  max-height: 80vh;
  overflow-y: auto;
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block;
  font-family: var(--head);
  font-size: .6rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 10px 20px;
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.mobile-nav a:hover  { background: rgba(201,168,76,.08); color: var(--gold-light); }
.mobile-nav a.sub    { font-family: var(--body); font-size: .8rem; font-weight: 600; color: #bbb; padding-left: 36px; letter-spacing: .03em; }
.mobile-nav a.sub:hover { color: var(--gold); }
.mobile-nav a.m-cta  { background: var(--gold); color: #000; margin: 10px 20px 0; border-radius: 2px; text-align: center; border-bottom: none; font-size: .62rem; padding: 10px 20px; }

/* ============================================================
   HEADER IMAGE  (below nav)

   ============================================================ */
.site-header {
  width: 100%;
  background: #000;
  border-bottom: 3px solid var(--gold);
  line-height: 0;
}
.site-header img { width: 100%; height: auto; display: block; }

/* ============================================================
   MAIN WRAPPER
   ============================================================ */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1 {
  font-family: var(--head);
  color: var(--gold);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  text-shadow: 0 0 40px rgba(201,168,76,.4);
  line-height: 1.2;
}
h1 em { color: var(--white); font-style: normal; }
h2 {
  font-family: var(--head);
  color: var(--cyan);
  font-size: clamp(1rem, 2.5vw, 1.45rem);
  font-weight: 700;
  letter-spacing: .06em;
  margin: 36px 0 14px;
  text-transform: uppercase;
  border-left: 4px solid var(--gold);
  padding-left: 14px;
}
h3 {
  font-family: var(--body);
  color: var(--gold-light);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 18px 0 8px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
p { margin-bottom: 14px; color: #ccc; font-size: 1.02rem; line-height: 1.75; }
p strong { color: var(--gold-light); }
.mono { font-family: var(--mono); }
.section-label {
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--gold-dark);
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 36px 0;
}

/* ============================================================
   PAGE HERO BLOCK
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, #0a0a14 0%, #050510 50%, #080814 100%);
  border: 1px solid rgba(201,168,76,.3);
  border-radius: 4px;
  padding: 44px 36px 36px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
}
.page-hero::after {
  content: attr(data-icon);
  position: absolute; right: 32px; top: 50%;
  transform: translateY(-50%);
  font-size: 6rem; opacity: .05; pointer-events: none;
}
.page-hero h1 { color: var(--white); text-shadow: 0 0 40px rgba(201,168,76,.3); }
.page-hero h1 em { color: var(--gold); }
.page-hero .lead {
  font-size: 1.06rem; color: #bbb; max-width: 760px;
  border-left: 3px solid var(--gold-dark); padding-left: 14px;
  line-height: 1.8; margin-bottom: 0;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: linear-gradient(135deg, #0d0d1a 0%, #111128 100%);
  border: 1px solid rgba(201,168,76,.22);
  border-radius: 4px;
  padding: 26px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
}
.card:hover { border-color: rgba(201,168,76,.44); box-shadow: 0 8px 32px rgba(0,0,0,.5); }
.card h3 { margin-top: 0; }

/* ============================================================
   GRIDS
   ============================================================ */
.grid-2    { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3    { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 20px; }

/* ============================================================
   PILLAR CARDS  (zero trust overview page)
   ============================================================ */
.pillar-card {
  background: var(--steel);
  border: 1px solid rgba(0,212,255,.2);
  border-radius: 4px;
  padding: 22px;
  display: block;
  transition: all .25s;
}
.pillar-card:hover {
  border-color: var(--cyan);
  background: #1a1a35;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0,212,255,.12);
}
.pillar-num {
  font-family: var(--head);
  font-size: 2.4rem; font-weight: 900;
  color: rgba(201,168,76,.22);
  line-height: 1; margin-bottom: 8px;
}
.pillar-title {
  font-family: var(--head);
  color: var(--cyan);
  font-size: .76rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .07em;
  margin-bottom: 8px;
}
.pillar-desc { color: #aaa; font-size: .9rem; margin-bottom: 10px; }
.pillar-link {
  font-family: var(--mono);
  font-size: .66rem; color: var(--gold);
  letter-spacing: .08em; text-transform: uppercase;
}

/* ============================================================
   PILLAR DETAIL PAGES
   ============================================================ */
.pillar-hero {
  background: linear-gradient(135deg,#0a0a14 0%,#050510 50%,#080814 100%);
  border: 1px solid rgba(201,168,76,.3);
  border-radius: 4px;
  padding: 40px 32px 32px;
  margin-bottom: 32px;
  position: relative; overflow: hidden;
}
.pillar-hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-dark));
}
.pillar-hero h1 {
  color: var(--white);
  font-size: clamp(1.8rem,4vw,2.8rem);
  text-shadow: 0 0 40px rgba(201,168,76,.3);
  margin-bottom: 14px;
}
.pillar-hero h1 em { color: var(--gold); }
.pillar-number {
  font-family: var(--mono);
  font-size: .68rem; color: var(--gold-dark);
  letter-spacing: .14em; margin-bottom: 10px;
}
.back-link {
  font-family: var(--mono);
  font-size: .68rem; color: var(--gray);
  letter-spacing: .08em; display: inline-block;
  margin-bottom: 16px; transition: color .2s;
}
.back-link:hover { color: var(--gold); }
.pillar-tagline {
  font-size: 1.05rem; color: #bbb; max-width: 800px;
  line-height: 1.8;
  border-left: 3px solid var(--gold-dark); padding-left: 14px;
  margin-bottom: 0;
}

/* Content blocks inside pillar pages */
.content-block { margin-bottom: 36px; }
.content-block h3 {
  font-family: var(--mono);
  font-size: .74rem; color: var(--gold);
  letter-spacing: .14em; text-transform: uppercase;
  margin-bottom: 14px; padding-bottom: 8px;
  border-bottom: 1px solid rgba(201,168,76,.15);
}
.content-block p { max-width: 840px; }
.content-block strong { color: var(--gold-light); }

/* Activity / requirement list */
.req-list { display: flex; flex-direction: column; gap: 7px; }
.req-list li {
  color: #bbb; font-size: .97rem;
  padding: 10px 14px 10px 38px;
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(201,168,76,.08);
  border-radius: 3px; position: relative;
  transition: border-color .2s; line-height: 1.6;
}
.req-list li:hover { border-color: rgba(201,168,76,.22); }
.req-list li::before {
  content: '▸'; position: absolute; left: 14px; top: 11px;
  color: var(--gold-dark); font-size: .8rem;
}
.req-list li strong { color: var(--cyan); }

/* Callout / operational principle */
.callout {
  background: linear-gradient(135deg,#080a18,#0a1208);
  border: 1px solid rgba(0,212,255,.18);
  border-left: 4px solid var(--cyan);
  border-radius: 4px; padding: 22px 26px; margin: 28px 0;
}
.callout-label {
  font-family: var(--mono);
  font-size: .63rem; color: var(--cyan-dim);
  letter-spacing: .14em; text-transform: uppercase; margin-bottom: 10px;
}
.callout p { color: #ddd; max-width: 820px; margin-bottom: 0; }
.callout strong { color: var(--cyan); }

/* Highlight / warn boxes */
.highlight-box {
  background: rgba(0,212,255,.04);
  border: 1px solid rgba(0,212,255,.18);
  border-left: 4px solid var(--cyan);
  border-radius: 4px; padding: 16px 20px; margin: 16px 0;
}
.warn-box {
  background: rgba(201,168,76,.04);
  border: 1px solid rgba(201,168,76,.22);
  border-left: 4px solid var(--gold);
  border-radius: 4px; padding: 16px 20px; margin: 16px 0;
}

/* Technology / product rows */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px,1fr));
  gap: 12px; margin-top: 12px;
}
.tech-card {
  background: var(--dark2);
  border: 1px solid rgba(201,168,76,.22);
  border-radius: 3px; padding: 14px 16px;
}
.tech-type {
  font-family: var(--mono);
  font-size: .58rem; color: var(--muted);
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 5px;
}
.tech-name {
  font-family: var(--body);
  font-size: .92rem; font-weight: 700;
  color: var(--gold-light); margin-bottom: 4px;
}
.tech-note { font-size: .82rem; color: #777; line-height: 1.5; margin-bottom: 0; }

/* Standards / compliance tags */
.standards-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.std-tag {
  display: flex; flex-direction: column;
  background: var(--dark2);
  border: 1px solid rgba(201,168,76,.22);
  border-radius: 3px; padding: 10px 14px; min-width: 120px;
}
.std-label { font-family: var(--mono); font-size: .56rem; color: #555; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 4px; }
.std-val   { font-family: var(--body); font-size: .88rem; font-weight: 700; color: var(--gold-light); }

/* Pillar prev / next navigation */
.pillar-nav {
  display: flex; justify-content: space-between;
  padding: 18px 0;
  border-top: 1px solid rgba(201,168,76,.18);
  border-bottom: 1px solid rgba(201,168,76,.18);
  margin: 28px 0 40px; gap: 12px;
}
.pnav-link {
  font-family: var(--mono);
  font-size: .68rem; color: var(--gold);
  letter-spacing: .08em; text-transform: uppercase;
  padding: 8px 16px;
  border: 1px solid rgba(201,168,76,.28);
  border-radius: 2px; transition: all .2s;
}
.pnav-link:hover { background: rgba(201,168,76,.1); color: var(--gold-light); }
.pnav-link.next { margin-left: auto; }

/* ============================================================
   STAT BLOCKS
   ============================================================ */
.stat-row { display: flex; flex-wrap: wrap; gap: 16px; margin: 28px 0; }
.stat-box {
  flex: 1; min-width: 130px;
  background: rgba(201,168,76,.04);
  border: 1px solid rgba(201,168,76,.18);
  border-radius: 4px; padding: 20px 16px; text-align: center;
}
.stat-num {
  font-family: var(--head);
  font-size: clamp(2rem,4vw,3rem); font-weight: 900;
  color: var(--gold); line-height: 1; margin-bottom: 6px;
}
.stat-label { font-family: var(--mono); font-size: .62rem; color: var(--gray); letter-spacing: .1em; text-transform: uppercase; }

/* ============================================================
   CERT / CREDENTIAL BADGES
   ============================================================ */
.certs { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.cert {
  background: linear-gradient(135deg,#0d1a0d,#112211);
  border: 1px solid #2a4a2a;
  color: #6dce6d;
  font-family: var(--mono); font-size: .76rem;
  padding: 6px 14px; border-radius: 3px; letter-spacing: .06em;
}
.badge {
  display: inline-block;
  background: rgba(201,168,76,.1);
  border: 1px solid var(--gold-dark);
  color: var(--gold);
  font-family: var(--mono); font-size: .68rem;
  padding: 3px 10px; border-radius: 2px;
  letter-spacing: .08em; margin: 3px;
}

/* ============================================================
   FORMS
   ============================================================ */
.form-wrap {
  background: linear-gradient(135deg,#0d0d1a,#111128);
  border: 1px solid rgba(201,168,76,.28);
  border-radius: 4px; padding: 36px;
  position: relative; overflow: hidden;
}
.form-wrap::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg,var(--gold-dark),var(--gold),var(--gold-dark));
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: var(--mono); font-size: .66rem;
  color: var(--gold-dark); letter-spacing: .12em;
  text-transform: uppercase; margin-bottom: 7px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(201,168,76,.2);
  border-radius: 3px;
  color: var(--white);
  font-family: var(--body); font-size: 1rem;
  padding: 11px 14px; outline: none;
  transition: border-color .2s;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  background: rgba(201,168,76,.04);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-group select option { background: #0d0d1a; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-block;
  font-family: var(--head); font-size: .7rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  padding: 13px 28px; border-radius: 2px;
  transition: all .2s; cursor: pointer; border: none;
  text-decoration: none;
}
.btn-primary { background: var(--gold); color: #000; border: 2px solid var(--gold); }
.btn-primary:hover { background: var(--gold-light); border-color: var(--gold-light); }
.btn-outline { background: transparent; color: var(--gold); border: 2px solid var(--gold-dark); }
.btn-outline:hover { border-color: var(--gold); background: rgba(201,168,76,.08); }
.btn-full { width: 100%; text-align: center; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band {
  background: linear-gradient(135deg,#060610,#0d0d1a 50%,#060610);
  border-top: 1px solid rgba(201,168,76,.18);
  border-bottom: 1px solid rgba(201,168,76,.18);
  padding: 60px 24px; text-align: center;
  margin: 48px -24px 0;
}
.cta-band .cta-label {
  font-family: var(--mono); font-size: .68rem;
  color: var(--cyan-dim); letter-spacing: .14em;
  text-transform: uppercase; margin-bottom: 14px;
}
.cta-band h2 {
  border-left: none; padding-left: 0;
  font-size: clamp(1.3rem,3vw,2rem);
  color: var(--white);
  text-shadow: 0 0 40px rgba(201,168,76,.3);
  margin: 0 0 14px;
}
.cta-band h2 em { color: var(--gold); font-style: normal; }
.cta-band p { color: #888; max-width: 540px; margin: 0 auto 28px; }
.cta-band .btn-row { justify-content: center; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: #000;
  border-top: 2px solid var(--gold-dark);
}
.footer-body {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 28px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 36px;
}
.footer-logo {
  font-family: var(--head); font-size: 1.1rem;
  font-weight: 900; color: #333; margin-bottom: 10px;
}
.footer-logo span { color: var(--gold); }
.footer-brand p { color: var(--muted); font-size: .82rem; line-height: 1.7; margin-bottom: 5px; }
.footer-col-title {
  font-family: var(--mono); font-size: .6rem;
  color: var(--gold-dark); letter-spacing: .14em;
  text-transform: uppercase; margin-bottom: 12px;
  padding-bottom: 7px;
  border-bottom: 1px solid rgba(201,168,76,.1);
}
.footer-col ul li { margin-bottom: 6px; }
.footer-col ul li a { color: #555; font-size: .83rem; transition: color .2s; }
.footer-col ul li a:hover { color: var(--gold); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.04);
  padding: 16px 24px;
  max-width: var(--max); margin: 0 auto;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.footer-bottom p {
  font-family: var(--mono); font-size: .62rem;
  color: #333; letter-spacing: .06em; margin-bottom: 0;
}
.footer-bottom p span { color: var(--gold); }

/* ============================================================
   RESPONSIVE — LARGE TABLET  (≤ 1024px)
   Tighten nav link font and padding so all links fit one row
   ============================================================ */
@media (max-width: 1024px) {
  .nav-links > li > a {
    font-size: .48rem;
    padding: 0 6px;
    letter-spacing: .02em;
  }
  .nav-cta > a { padding: 0 8px !important; }
  .nav-logo { font-size: .7rem; }
}

/* ============================================================
   RESPONSIVE — TABLET  (≤ 900px)
   Switch to hamburger, collapse all desktop nav links
   ============================================================ */
@media (max-width: 900px) {
  /* Nav: hide desktop links, show hamburger */
  .nav-links  { display: none; }
  .hamburger  { display: flex; }
  .nav-inner  { height: 46px; padding: 0 14px; }
  .nav-logo   { font-size: .72rem; }

  /* Layout grids */
  .grid-3      { grid-template-columns: repeat(2,1fr); }
  .footer-body { grid-template-columns: 1fr 1fr; }
  .form-row    { grid-template-columns: 1fr; }
}

/* ============================================================
   RESPONSIVE — MOBILE  (≤ 640px)
   ============================================================ */
@media (max-width: 640px) {
  /* Nav already hamburger from 900px breakpoint */
  .nav-inner  { height: 44px; padding: 0 12px; }
  .nav-logo   { font-size: .68rem; }

  /* Collapse grids */
  .grid-2, .grid-3, .grid-auto, .tech-grid { grid-template-columns: 1fr; }

  /* Spacing */
  main        { padding: 24px 14px 56px; }
  .page-hero  { padding: 24px 16px 20px; }
  .page-hero::after { display: none; }
  .pillar-hero { padding: 22px 14px 18px; }
  .form-wrap  { padding: 22px 14px; }
  .cta-band   { margin: 36px -14px 0; padding: 40px 14px; }

  /* Pillar nav stack */
  .pillar-nav { flex-direction: column; }
  .pnav-link.next { margin-left: 0; }

  /* Stat row stack */
  .stat-row   { flex-direction: column; }
  .stat-box   { min-width: unset; }

  /* Footer stacks */
  .footer-body   { grid-template-columns: 1fr 1fr; gap: 18px; }
  .footer-brand  { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; }

  /* Era headers in hacker history */
  .era-header { flex-direction: column; gap: 8px; }

  /* Form row always single column on mobile */
  .form-row   { grid-template-columns: 1fr; }
}