/* ═══════════════════════════════════════════
   INVERSION GTM - SHARED STYLES
   Left rail layout (desktop) + mobile drawer
═══════════════════════════════════════════ */

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

:root {
  --bg:            #FAFAF8;
  --surface:       #F2F1EE;
  --surface-hover: #EAEAE7;
  --text:          #0A0A0A;
  --text-mid:      #444444;
  --text-dim:      #888888;
  --border:        rgba(0,0,0,0.09);
  --border-solid:  #E2E1DE;
  --dark-bg:       #0A0A0A;
  --dark-surface:  #111111;
  --dark-white:    #EDEDED;
  --dark-mid:      #AAAAAA;
  --dark-dim:      #666666;
  --dark-border:   rgba(255,255,255,0.06);
  --dark-grid:     rgba(255,255,255,0.04);
  --red:           #DB143B;
  --red-hover:     #B8102F;
  --rail:          280px;
  --mob-bar:       56px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Archivo', sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
}

/* ══════════════════════════════════════════
   LEFT RAIL (desktop)
══════════════════════════════════════════ */

#rail {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--rail);
  background: var(--dark-bg);
  border-right: 1px solid var(--dark-border);
  display: flex;
  flex-direction: column;
  padding: 36px 32px;
  z-index: 200;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.brand-mark {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: block;
}

.rail-logo {
  font-family: 'Archivo', sans-serif;
  font-size: 13px; font-weight: 800;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--dark-white); text-decoration: none;
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.rail-gtm { color: var(--red); }

.rail-sub {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--dark-dim); margin-bottom: 36px;
}

.rail-thesis {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  font-size: 14px; line-height: 1.65;
  color: var(--dark-mid);
  padding-bottom: 28px;
  border-bottom: 1px solid var(--dark-border);
  margin-bottom: 28px;
}

.rail-thesis strong {
  font-family: 'Archivo', sans-serif;
  font-style: normal; font-weight: 700;
  color: var(--dark-white);
}

#rail nav {
  display: flex; flex-direction: column;
  gap: 2px; flex: 1;
}

#rail nav a {
  font-family: 'Geist Mono', monospace;
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--dark-dim); text-decoration: none;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

#rail nav a:hover { color: var(--dark-white); background: var(--dark-grid); }
#rail nav a.active { color: var(--dark-white); border-left-color: var(--red); }

.rail-bottom {
  margin-top: auto;
  padding-top: 28px;
  border-top: 1px solid var(--dark-border);
}

.rail-bottom-label {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--dark-dim); margin-bottom: 10px;
}

.btn-rail {
  display: block;
  background: var(--red); color: white;
  font-family: 'Archivo', sans-serif;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 10px 14px; text-decoration: none;
  text-align: center; transition: background 0.2s;
  margin-bottom: 12px;
}

.btn-rail:hover { background: var(--red-hover); }

.rail-contact {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; color: var(--dark-dim);
  letter-spacing: 0.04em; line-height: 1.9;
}

.rail-contact a { color: var(--dark-dim); text-decoration: none; transition: color 0.2s; }
.rail-contact a:hover { color: var(--dark-white); }

/* ══════════════════════════════════════════
   MOBILE BAR (hidden on desktop)
══════════════════════════════════════════ */

#mob-bar {
  display: none;
}

/* ══════════════════════════════════════════
   OVERLAY (hidden until rail opens on mobile)
══════════════════════════════════════════ */

#rail-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 199;
  opacity: 0;
  transition: opacity 0.3s ease;
}

body.rail-open #rail-overlay {
  opacity: 1;
}

/* ── MAIN ── */
#main { margin-left: var(--rail); flex: 1; min-height: 100vh; }

/* ══════════════════════════════════════════
   PANELS
══════════════════════════════════════════ */
.panel        { padding: 64px 72px; border-bottom: 1px solid var(--border-solid); background: var(--bg); }
.panel-surface{ padding: 64px 72px; border-bottom: 1px solid var(--border-solid); background: var(--surface); }
.panel-dark   { padding: 64px 72px; border-bottom: 1px solid var(--dark-border);  background: var(--dark-bg); }
.panel-red    { padding: 56px 72px; background: var(--red); }

/* ══════════════════════════════════════════
   TYPOGRAPHY
══════════════════════════════════════════ */
.mono-label {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 6px;
}

.mono-label-light {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dark-dim); margin-bottom: 6px;
}

.mono-label-red {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--red); margin-bottom: 6px;
  display: flex; align-items: center; gap: 10px;
}
.mono-label-red::before {
  content: ''; display: block;
  width: 18px; height: 1px; background: var(--red); flex-shrink: 0;
}

.panel-h2 {
  font-family: 'Archivo', sans-serif;
  font-size: clamp(28px, 3vw, 40px); font-weight: 900;
  letter-spacing: -0.02em; text-transform: uppercase;
  color: var(--text); line-height: 1.05; margin-bottom: 40px;
}

.panel-h2-light {
  font-family: 'Archivo', sans-serif;
  font-size: clamp(28px, 3vw, 40px); font-weight: 900;
  letter-spacing: -0.02em; text-transform: uppercase;
  color: var(--dark-white); line-height: 1.05; margin-bottom: 40px;
}

.serif-italic {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
}

/* ══════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════ */
.btn-red {
  display: inline-block;
  background: var(--red); color: white;
  font-family: 'Archivo', sans-serif;
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 12px 24px; text-decoration: none;
  transition: background 0.2s;
}
.btn-red:hover { background: var(--red-hover); }

.btn-outline {
  display: inline-block;
  background: transparent; color: var(--text);
  font-family: 'Archivo', sans-serif;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 11px 24px; text-decoration: none;
  border: 1px solid var(--border-solid);
  transition: background 0.2s, border-color 0.2s;
}
.btn-outline:hover { background: var(--surface-hover); border-color: var(--text); }

.btn-ghost {
  font-family: 'Archivo', sans-serif;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-mid); text-decoration: none;
  border-bottom: 1px solid var(--border-solid); padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text); }

/* ══════════════════════════════════════════
   QUOTE BAND
══════════════════════════════════════════ */
.panel-red blockquote {
  font-family: 'Instrument Serif', serif; font-style: italic;
  font-size: clamp(22px, 3vw, 34px); color: white;
  line-height: 1.45; max-width: 760px;
}
.panel-red blockquote strong {
  font-family: 'Archivo', sans-serif;
  font-style: normal; font-weight: 800;
}

/* ══════════════════════════════════════════
   OFFERING CARDS
══════════════════════════════════════════ */
.offerings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border-solid);
  border: 1px solid var(--border-solid);
  margin-top: 40px;
}

.offer-card {
  background: var(--bg);
  padding: 36px 32px;
  position: relative;
  text-decoration: none; color: inherit;
  transition: background 0.2s;
  display: flex; flex-direction: column;
}
.offer-card:hover { background: var(--surface-hover); }
.offer-card:hover .offer-arrow { color: var(--red); transform: translate(3px,-3px); }
.offer-arrow {
  position: absolute; top: 28px; right: 28px;
  font-size: 16px; color: var(--border-solid);
  transition: color 0.2s, transform 0.2s;
}
.offer-label {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--red); margin-bottom: 14px;
}
.offer-title {
  font-family: 'Archivo', sans-serif;
  font-size: 20px; font-weight: 800;
  letter-spacing: -0.02em; color: var(--text);
  margin-bottom: 10px; text-transform: uppercase;
  line-height: 1.1;
}
.offer-body {
  font-size: 14px; line-height: 1.65;
  color: var(--text-mid); flex: 1; margin-bottom: 20px;
}
.offer-meta {
  font-family: 'Geist Mono', monospace;
  font-size: 11px; font-weight: 500; color: var(--text-dim);
  border-top: 1px solid var(--border-solid); padding-top: 14px;
  letter-spacing: 0.04em;
}
.offer-meta span { color: var(--red); font-weight: 600; }

/* ══════════════════════════════════════════
   BOOKS STRIP
══════════════════════════════════════════ */
.books-strip {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--border-solid);
  border: 1px solid var(--border-solid); margin-top: 2px;
}
.book-cell { background: var(--surface); padding: 28px; }
.book-num {
  font-family: 'Geist Mono', monospace;
  font-size: 10px; color: var(--text-dim);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 10px;
}
.book-title {
  font-family: 'Archivo', sans-serif;
  font-size: 16px; font-weight: 800;
  letter-spacing: -0.01em; color: var(--text); margin-bottom: 8px;
}
.book-desc {
  font-family: 'Instrument Serif', serif;
  font-style: italic; font-size: 13px;
  color: var(--text-mid); line-height: 1.55;
}

/* book-card / book-strip variants (books page) */
.book-card { background: var(--bg); padding: 32px 28px; }
.book-n { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--red); letter-spacing: 0.1em; margin-bottom: 12px; text-transform: uppercase; }
.book-title-lg { font-family: 'Archivo', sans-serif; font-size: 18px; font-weight: 900; color: var(--text); line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 10px; }
.book-title-lg .r { color: var(--red); }
.book-sub { font-family: 'Instrument Serif', serif; font-style: italic; font-size: 14px; line-height: 1.6; color: var(--text-mid); }

/* ══════════════════════════════════════════
   CAREER STRIP
══════════════════════════════════════════ */
.career-strip {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2px; background: var(--dark-border); margin-top: 40px;
}
.career-cell { background: var(--dark-bg); padding: 28px 24px; }
.career-period { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--red); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.career-co { font-family: 'Archivo', sans-serif; font-size: 14px; font-weight: 800; color: var(--dark-white); text-transform: uppercase; letter-spacing: 0.01em; margin-bottom: 4px; }
.career-role { font-size: 12px; color: var(--dark-dim); line-height: 1.5; }

/* ══════════════════════════════════════════
   PRINCIPLES
══════════════════════════════════════════ */
.principles-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 2px solid var(--dark-white); margin-top: 40px;
}
.princ {
  padding: 40px 0; border-bottom: 1px solid var(--dark-border);
}
.princ:nth-child(even) { padding-left: 48px; border-left: 1px solid var(--dark-border); }
.princ-n { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--red); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 8px; }
.princ-h { font-family: 'Archivo', sans-serif; font-size: 16px; font-weight: 800; color: var(--dark-white); margin-bottom: 10px; letter-spacing: -0.01em; }
.princ-text { font-size: 14px; line-height: 1.7; color: var(--dark-mid); }
.princ-text strong { font-family: 'Archivo', sans-serif; font-style: normal; font-weight: 600; color: var(--text); }
.princ-text a { color: var(--red); text-decoration: none; }

/* ══════════════════════════════════════════
   WHO LIST
══════════════════════════════════════════ */
.who-list { border-top: 2px solid var(--text); }
.who-item {
  display: grid; grid-template-columns: 56px 1fr;
  gap: 24px; padding: 28px 0;
  border-bottom: 1px solid var(--border-solid);
  align-items: start;
}
.who-n { font-family: 'Archivo', sans-serif; font-size: 28px; font-weight: 900; color: var(--border-solid); line-height: 1.1; letter-spacing: -0.03em; }
.who-h { font-family: 'Archivo', sans-serif; font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 6px; letter-spacing: -0.01em; }
.who-b { font-size: 14px; line-height: 1.65; color: var(--text-mid); }

/* ══════════════════════════════════════════
   PROCESS ROWS
══════════════════════════════════════════ */
.process-list { border-top: 2px solid var(--dark-white); }
.process-row {
  display: grid; grid-template-columns: 48px 1fr auto;
  gap: 28px; align-items: start;
  padding: 28px 0; border-bottom: 1px solid var(--dark-border);
}
.process-n { font-family: 'Archivo', sans-serif; font-size: 40px; font-weight: 900; color: var(--dark-grid); line-height: 1; letter-spacing: -0.04em; }
.process-h { font-family: 'Archivo', sans-serif; font-size: 15px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.02em; color: var(--dark-white); margin-bottom: 8px; }
.process-b { font-size: 13px; line-height: 1.65; color: var(--dark-dim); }
.process-tag { font-family: 'Geist Mono', monospace; font-size: 10px; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--red); border: 1px solid rgba(219,20,59,0.3); padding: 4px 10px; white-space: nowrap; align-self: start; margin-top: 4px; }

/* ══════════════════════════════════════════
   STAT ROW
══════════════════════════════════════════ */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--border-solid); margin-top: 48px; }
.stat-cell { padding: 24px 0; border-right: 1px solid var(--border-solid); padding-right: 28px; }
.stat-cell:last-child { border-right: none; }
.stat-n { font-family: 'Archivo', sans-serif; font-size: 40px; font-weight: 900; letter-spacing: -0.03em; color: var(--text); line-height: 1; margin-bottom: 4px; }
.stat-n .r { color: var(--red); }
.stat-l { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; }

/* ══════════════════════════════════════════
   CTA SPLIT
══════════════════════════════════════════ */
.cta-split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.cta-h { font-family: 'Archivo', sans-serif; font-size: clamp(26px, 3vw, 42px); font-weight: 900; text-transform: uppercase; letter-spacing: -0.02em; color: var(--text); line-height: 1.05; margin-bottom: 14px; }
.cta-p { font-family: 'Instrument Serif', serif; font-style: italic; font-size: 17px; color: var(--text-mid); line-height: 1.6; }
.cta-actions { display: flex; flex-direction: column; gap: 10px; }
.cta-note { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--text-dim); text-align: center; letter-spacing: 0.04em; margin-top: 4px; }
.cta-note a { color: var(--red); text-decoration: none; }

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
footer { background: var(--dark-bg); padding: 40px 72px 32px; border-top: 1px solid var(--dark-border); }
.footer-top { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 16px; padding-bottom: 20px; border-bottom: 1px solid var(--dark-border); margin-bottom: 16px; }
.footer-brand { font-family: 'Archivo', sans-serif; font-size: 13px; font-weight: 700; color: var(--dark-white); letter-spacing: 0.02em; }
.footer-brand span { font-weight: 400; color: var(--dark-dim); font-size: 11px; margin-left: 10px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { font-family: 'Geist Mono', monospace; font-size: 10px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--dark-dim); text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--dark-white); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-copy { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--dark-dim); letter-spacing: 0.04em; }

/* ══════════════════════════════════════════
   REVEAL ANIMATIONS
══════════════════════════════════════════ */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.45s ease, transform 0.45s ease; }
.reveal.visible { opacity: 1; transform: none; }
.rv1 { transition-delay: 0.07s; }
.rv2 { transition-delay: 0.14s; }
.rv3 { transition-delay: 0.21s; }

/* ══════════════════════════════════════════
   INNER PAGE HERO
══════════════════════════════════════════ */
.page-hero { background: var(--dark-bg); padding: 72px 80px 64px; border-bottom: 1px solid var(--dark-border); }
.page-hero-eyebrow { font-family: 'Geist Mono', monospace; font-size: 10px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--red); margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.page-hero-eyebrow::before { content: ''; display: block; width: 18px; height: 1px; background: var(--red); }
.page-hero h1 { font-family: 'Archivo', sans-serif; font-size: clamp(40px, 5vw, 72px); font-weight: 900; letter-spacing: -0.03em; text-transform: uppercase; color: var(--dark-white); line-height: 1.0; margin-bottom: 20px; }
.page-hero-sub { font-family: 'Instrument Serif', serif; font-style: italic; font-size: clamp(17px, 2vw, 22px); color: var(--dark-mid); max-width: 640px; line-height: 1.5; }

/* ══════════════════════════════════════════
   NUMBERED FEATURES
══════════════════════════════════════════ */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--border-solid); border: 1px solid var(--border-solid); }
.feature-cell { background: var(--bg); padding: 32px 28px; }
.feature-n { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--red); letter-spacing: 0.1em; margin-bottom: 10px; }
.feature-h { font-family: 'Archivo', sans-serif; font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 8px; letter-spacing: -0.01em; }
.feature-b { font-size: 14px; line-height: 1.65; color: var(--text-mid); }
.feature-grid-dark { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--dark-border); border: 1px solid var(--dark-border); }
.feature-cell-dark { background: var(--dark-bg); padding: 32px 28px; }
.feature-n-dark { font-family: 'Geist Mono', monospace; font-size: 10px; color: var(--red); letter-spacing: 0.1em; margin-bottom: 10px; }
.feature-h-dark { font-family: 'Archivo', sans-serif; font-size: 15px; font-weight: 700; color: var(--dark-white); margin-bottom: 8px; }
.feature-b-dark { font-size: 13px; line-height: 1.65; color: var(--dark-dim); }

/* ══════════════════════════════════════════
   PIPELINE STAGES
══════════════════════════════════════════ */
.stages { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--border-solid); border: 1px solid var(--border-solid); }
.stage { background: var(--bg); padding: 24px 16px; }
.stage-n { font-family: 'Geist Mono', monospace; font-size: 9px; color: var(--red); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 8px; }
.stage-name { font-family: 'Archivo', sans-serif; font-size: 13px; font-weight: 800; color: var(--text); text-transform: uppercase; margin-bottom: 6px; letter-spacing: 0.02em; }
.stage-def { font-size: 12px; line-height: 1.55; color: var(--text-mid); }

/* ══════════════════════════════════════════
   MOBILE - ≤ 900px
   Rail becomes a slide-in drawer
══════════════════════════════════════════ */
@media (max-width: 900px) {

  body { display: block; overflow-x: hidden; }

  /* Rail slides off-screen by default */
  #rail {
    transform: translateX(-100%);
    width: 280px;
    /* stay fixed, stay full-height - just hidden */
  }

  /* When open, slide in */
  body.rail-open #rail {
    transform: translateX(0);
  }

  /* Show the overlay */
  #rail-overlay {
    display: block;
    pointer-events: none;
  }

  body.rail-open #rail-overlay {
    pointer-events: auto;
  }

  /* Mobile top bar */
  #mob-bar {
    display: flex;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--mob-bar);
    background: var(--dark-bg);
    border-bottom: 2px solid var(--red);
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 198;
  }

  .mob-logo {
    font-family: 'Archivo', sans-serif;
    font-size: 13px; font-weight: 800;
    letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--dark-white); text-decoration: none;
    display: flex;
    align-items: center;
    gap: 7px;
  }

  .mob-logo span { color: var(--red); }

  .mob-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none; border: none; cursor: pointer;
    padding: 8px;
  }

  .mob-burger span {
    display: block; width: 22px; height: 2px;
    background: var(--dark-white);
    transition: transform 0.25s, opacity 0.25s;
  }

  body.rail-open .mob-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.rail-open .mob-burger span:nth-child(2) { opacity: 0; }
  body.rail-open .mob-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Push content down so mobile bar doesn't cover it */
  #main {
    margin-left: 0;
    padding-top: var(--mob-bar);
  }

  /* Content layout fixes */
  .panel, .panel-surface, .panel-dark, .panel-red { padding: 48px 20px; }
  footer { padding: 32px 20px 24px; }
  .page-hero { padding: 48px 20px 40px; }

  /* Grids collapse */
  .offerings-grid      { grid-template-columns: 1fr; }
  .books-strip         { grid-template-columns: 1fr; }
  .career-strip        { grid-template-columns: 1fr 1fr; }
  .principles-grid     { grid-template-columns: 1fr; }
  .princ:nth-child(even) { padding: 32px 0; border-left: none; }
  .cta-split           { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid,
  .feature-grid-dark   { grid-template-columns: 1fr; }
  .stages              { grid-template-columns: repeat(3, 1fr); }
  .stat-row            { grid-template-columns: 1fr 1fr; }
  .process-row         { grid-template-columns: 40px 1fr; }
  .process-tag         { display: none; }
}

@media (max-width: 480px) {
  .career-strip { grid-template-columns: 1fr; }
  .stat-row     { grid-template-columns: 1fr 1fr; }
  .stages       { grid-template-columns: repeat(2, 1fr); }
}