/* ===========================================================
   REV1 ENERGY — DESIGN SYSTEM
   Industrial navy/red brand · Cabinet Grotesk + Satoshi (tech-services refined)
   =========================================================== */

:root {
  /* Fluid type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7.5rem);

  /* 4px spacing system */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 500ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 680px;
  --content-default: 1080px;
  --content-wide: 1320px;
  --content-full: 1480px;

  --font-display: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-display-tracking: -0.02em;
  --font-body: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-editorial: 'Fraunces', 'Iowan Old Style', Georgia, serif;

  /* Chartreuse "live indicator" accent (secondary, HUD-style only) */
  --color-live: #dff140;
  --color-live-soft: rgba(223, 241, 64, 0.18);
}

/* SITE THEME — clean paper with navy primary (dark mode removed) */
:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-2: #fbfcfd;
  --color-surface-offset: #eef1f5;
  --color-surface-offset-2: #e4e8ee;
  --color-surface-dynamic: #dae0e9;
  --color-divider: #e1e5ec;
  --color-border: #ccd3dd;

  --color-text: #0c1a33;
  --color-text-muted: #4a5568;
  --color-text-faint: #8b95a6;
  --color-text-inverse: #ffffff;

  /* Rev1 navy — primary brand */
  --color-primary: #0a2b5c;
  --color-primary-hover: #071f44;
  --color-primary-active: #061633;
  --color-primary-highlight: #d7deeb;

  /* Rev1 red — accent */
  --color-accent: #ce1126;
  --color-accent-hover: #a90d1e;
  --color-accent-active: #870a17;
  --color-accent-highlight: #f6d4d8;

  --color-success: #1f8a4c;
  --color-warning: #c76216;
  --color-error: #b5142a;

  --shadow-xs: 0 1px 2px rgba(10, 20, 40, 0.06);
  --shadow-sm: 0 2px 6px rgba(10, 20, 40, 0.08);
  --shadow-md: 0 10px 30px rgba(10, 20, 40, 0.10);
  --shadow-lg: 0 24px 60px rgba(10, 20, 40, 0.14);
  --shadow-primary: 0 20px 50px rgba(10, 43, 92, 0.28);

  --gradient-hero: linear-gradient(135deg, #0a2b5c 0%, #061633 55%, #0a2b5c 100%);
  --gradient-accent: linear-gradient(135deg, #ce1126 0%, #870a17 100%);
  --gradient-cool: linear-gradient(180deg, #f6f7f9 0%, #e4e8ee 100%);

  --grid-line: rgba(10, 43, 92, 0.06);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1, 'liga' 1, 'cv11' 1, 'ss01' 1;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  text-wrap: balance;
  line-height: 1.1;
  color: var(--color-text);
  text-transform: uppercase;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'ss01' 1;
}

/* Refined tech: heavy but sentence-case, tighter tracking, no shouting uppercase */
h1 { font-weight: 700; letter-spacing: -0.035em; line-height: 1.02; text-transform: none; }
h2 { font-weight: 600; letter-spacing: -0.025em; line-height: 1.05; text-transform: none; }
h3 { font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; text-transform: none; }
h4 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; text-transform: none; }
h5, h6 { font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; font-size: var(--text-xs); }

p, li, figcaption {
  text-wrap: pretty;
  max-width: 72ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
a:hover { color: var(--color-accent); }

::selection {
  background: var(--color-accent);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button {
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-body);
}

@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;
  }
}

a, button, [role='button'], input, textarea, select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border-width: 0;
}

/* ======================  LAYOUT UTILITIES  ====================== */
.container { width: 100%; max-width: var(--content-full); margin-inline: auto; padding-inline: clamp(var(--space-4), 4vw, var(--space-12)); }
.container-wide { max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 4vw, var(--space-12)); }
.container-default { max-width: var(--content-default); margin-inline: auto; padding-inline: clamp(var(--space-4), 4vw, var(--space-12)); }
.container-narrow { max-width: var(--content-narrow); margin-inline: auto; padding-inline: clamp(var(--space-4), 4vw, var(--space-12)); }

section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
section.tight { padding-block: clamp(var(--space-10), 5vw, var(--space-20)); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

/* HUD-style data label — Anduril 'Elios' substitute */
.hud-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--color-text-muted);
}
.hud-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-live);
  box-shadow: 0 0 10px var(--color-live-soft);
  animation: hud-pulse 2s ease-in-out infinite;
}
@keyframes hud-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }

.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }

/* ==========================  BUTTONS  ========================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-transform: none;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(206, 17, 38, 0.28);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}
.btn-outline-light:hover {
  background: #fff;
  color: var(--color-primary);
}

.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); min-height: 52px; }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); min-height: 36px; }

.btn .arrow { transition: transform var(--transition-interactive); }
.btn:hover .arrow { transform: translateX(4px); }

/* ==========================  HEADER / NAV — Floating pill  ========================== */
.site-header {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: min(1160px, calc(100% - var(--space-6)));
  background: color-mix(in oklab, var(--color-bg) 55%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
  border-radius: 9999px;
  box-shadow: 0 2px 14px -8px rgba(0,0,0,0.12);
  opacity: 0.72;
  transition: opacity 240ms ease, background 240ms ease, box-shadow 240ms ease, border-color 240ms ease, top 240ms ease, transform 240ms ease;
}
.site-header:hover,
.site-header:focus-within {
  opacity: 1;
  background: color-mix(in oklab, var(--color-bg) 96%, transparent);
  box-shadow: 0 10px 30px -12px rgba(0,0,0,0.22);
  border-color: color-mix(in srgb, var(--color-text) 14%, transparent);
}
.site-header.scrolled {
  opacity: 0.88;
  background: color-mix(in oklab, var(--color-bg) 85%, transparent);
  border-color: color-mix(in srgb, var(--color-text) 12%, transparent);
  box-shadow: 0 8px 24px -10px rgba(0,0,0,0.2);
}
.site-header.scrolled:hover,
.site-header.scrolled:focus-within {
  opacity: 1;
  background: color-mix(in oklab, var(--color-bg) 98%, transparent);
  box-shadow: 0 14px 34px -12px rgba(0,0,0,0.28);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-3) var(--space-5);
  min-height: 56px;
}
@media (max-width: 640px) {
  .site-header {
    top: var(--space-3);
    width: calc(100% - var(--space-5));
    border-radius: 9999px;
  }
  .nav { padding: var(--space-2) var(--space-4); min-height: 52px; }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  line-height: 1;
  text-decoration: none;
  margin-right: var(--space-6);
}
.brand:hover { color: var(--color-text); }
.brand .logo-img {
  display: block;
  height: 36px;
  width: auto;
  flex-shrink: 0;
  transition: height var(--transition-interactive);
}
.site-header.scrolled .brand .logo-img { height: 32px; }
@media (min-width: 768px) {
  .brand .logo-img { height: 40px; }
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0 auto 0 0;
  flex-wrap: nowrap;
}
.nav-links li { white-space: nowrap; }
.nav-links a, .nav-dropdown > button { white-space: nowrap; }
.nav-links a {
  position: relative;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-transform: none;
  padding: var(--space-2) 0;
  border-radius: 0;
  transition: color var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-accent); background: transparent; }
.nav-links a.active { color: var(--color-text); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 0;
}

.nav-dropdown { position: relative; }
.nav-dropdown > button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-transform: none;
  padding: var(--space-2) 0;
  border-radius: 0;
  transition: color var(--transition-interactive);
}
.nav-dropdown > button:hover { color: var(--color-accent); background: transparent; }
.nav-dropdown > button svg { transition: transform var(--transition-interactive); }
.nav-dropdown.open > button svg { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 320px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-interactive);
}
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu a {
  display: flex;
  flex-direction: column;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text);
}
.nav-dropdown-menu a:hover {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}
.nav-dropdown-menu .item-title { font-weight: 600; font-size: var(--text-sm); }
.nav-dropdown-menu .item-desc { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 2px; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle, .menu-toggle {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
}
.theme-toggle:hover, .menu-toggle:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.menu-toggle { display: inline-flex; }

/* Show full nav inline starting at tablet-portrait and up */
@media (min-width: 820px) {
  .nav-links { display: flex; gap: var(--space-4); }
  .nav-links a,
  .nav-dropdown > button { font-size: 0.82rem; }
  .menu-toggle { display: none; }
  .brand { margin-right: var(--space-4); }
  .nav { gap: var(--space-4); padding-inline: var(--space-4); }
}
@media (min-width: 960px) {
  .nav-links { gap: var(--space-5); }
  .nav-links a,
  .nav-dropdown > button { font-size: 0.875rem; }
  .brand { margin-right: var(--space-6); }
  .nav { padding-inline: var(--space-5); }
}
@media (min-width: 1200px) {
  .nav-links { gap: var(--space-6); }
}

/* Mobile nav drawer */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-interactive), visibility var(--transition-interactive);
  overflow-y: auto;
}
.mobile-nav.open { opacity: 1; visibility: visible; }
.mobile-nav-inner {
  padding: calc(var(--space-16) + var(--space-4)) var(--space-6) var(--space-12);
  max-width: 520px;
  margin: 0 auto;
}
.mobile-nav a {
  display: block;
  padding: var(--space-4) 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-divider);
  line-height: 1.25;
  text-decoration: none;
}
.mobile-nav a:hover,
.mobile-nav a:focus-visible { color: var(--color-accent); }

/* Mobile nav section label */
.mobile-nav-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint, var(--color-text-muted));
  padding: var(--space-5) 0 var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

/* Mobile nav sub-links (service children) */
.mobile-nav .mobile-sublist {
  list-style: none;
  margin: 0;
  padding: 0;
}
.mobile-nav .mobile-sublist a {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  padding: var(--space-3) 0 var(--space-3) var(--space-5);
  position: relative;
}
.mobile-nav .mobile-sublist a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--color-accent);
  transform: translateY(-50%);
}
.mobile-nav .mobile-sublist .sub-desc {
  display: block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: 2px;
  letter-spacing: 0;
}

/* Mobile CTA button inside drawer */
.mobile-nav-cta {
  display: block;
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-6) !important;
  text-align: center;
  background: var(--color-accent);
  color: #fff !important;
  border: none !important;
  border-radius: 9999px;
  font-size: var(--text-base) !important;
  font-weight: 600 !important;
}
.mobile-nav-cta:hover,
.mobile-nav-cta:focus-visible { background: #a30d1e; color: #fff !important; }

.mobile-nav .close-btn {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text);
  border: 1px solid var(--color-divider);
  z-index: 201;
}

/* ==========================  FOOTER  ========================== */
.site-footer {
  background: var(--color-primary);
  color: #e2e8f0;
  padding-block: var(--space-20) var(--space-10);
  position: relative;
  overflow: hidden;
}


.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-10);
  margin-bottom: var(--space-16);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand h3 {
  color: #fff;
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.footer-brand p {
  color: rgba(255,255,255,0.72);
  font-size: var(--text-sm);
  max-width: 38ch;
}
.footer-brand .brand {
  color: #fff;
  margin-bottom: var(--space-4);
}
.footer-brand .brand .logo-img { height: 48px; }

.footer-col h4 {
  color: #fff;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-sm);
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.55);
  font-size: var(--text-xs);
  flex-wrap: wrap;
}
.footer-bottom .social {
  display: flex;
  gap: var(--space-3);
}
.footer-bottom .social a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.footer-bottom .social a:hover { background: var(--color-accent); }

/* ==========================  CARDS / MISC  ========================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* Grid background pattern */
.grid-bg {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Page header (interior pages) */
.page-hero {
  padding-top: clamp(120px, 14vh, 180px);
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-24));
  background: var(--gradient-hero);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at top, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at top, black 30%, transparent 80%);
}
.page-hero > .container { position: relative; }
.page-hero .eyebrow { color: var(--color-accent); }
.page-hero .eyebrow::before { background: var(--color-accent); }
.page-hero h1 {
  font-size: var(--text-2xl);
  color: #fff;
  margin-block: var(--space-4);
  max-width: 22ch;
}
.page-hero .lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.82);
  max-width: 58ch;
  font-weight: 300;
  line-height: 1.5;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in-view { opacity: 1; transform: none; }

/* Headings helpers */
.h1 { font-size: var(--text-2xl); }
.h2 { font-size: var(--text-xl); }
.h3 { font-size: var(--text-lg); }

/* Pull elements to front on hero */
.stack { display: flex; flex-direction: column; gap: var(--space-4); }
.row { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }

/* =========================================================
   Footer References / Sources block
   ========================================================= */
.footer-refs {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: var(--space-8) var(--space-6);
  margin-top: var(--space-10);
}
.footer-refs h4 {
  color: rgba(255,255,255,0.7);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  margin-bottom: var(--space-4);
}
.ref-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4) var(--space-8);
  counter-reset: none;
}
@media (max-width: 720px) {
  .ref-list { grid-template-columns: 1fr; }
}
.ref-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  line-height: 1.55;
  color: rgba(255,255,255,0.55);
  max-width: none;
  scroll-margin-top: 100px;
}
.ref-list li:target .ref-body {
  color: rgba(255,255,255,0.95);
  background: rgba(255,255,255,0.03);
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 200ms ease, color 200ms ease;
}
.ref-num {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: rgba(255,255,255,0.4);
  padding: 2px 7px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 3px;
  line-height: 1.2;
  min-width: 28px;
  text-align: center;
}
.ref-body { flex: 1; }
.ref-body em {
  color: rgba(255,255,255,0.8);
  font-style: italic;
  font-weight: 400;
}
.ref-body a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 150ms ease, color 150ms ease;
}
.ref-body a:hover {
  color: #ff5e6f;
  border-bottom-color: currentColor;
}