/* ═══════════════════════════════════════════════════════════════════════════
   RESAVYA ADVANCE MATERIALS — STYLESHEET v2
   Dark industrial precision. Space Grotesk × Inter × IBM Plex Mono.
   Redesigned for high contrast & premium readability.
════════════════════════════════════════════════════════════════════════════ */

/* ── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  /* Backgrounds — premium cream/off-white (no pure white) */
  --bg-primary:       #F9F8F6; /* Textured Off-White */
  --bg-secondary:     #F0EDE6; /* Slightly darker cream */
  --bg-card:          #F4F1EB; /* Warm cream */
  --bg-card-hover:    #EBE7DF;
  --border:           #D9DAE0; /* Light Cool Gray */
  --border-subtle:    #E5E6EB;
  --border-accent:    rgba(30, 58, 138, 0.2);

  /* Typography — Dark Navy Blue */
  --text-primary:     #111F4A; /* Deep Navy Blue */
  --text-secondary:   #1A2C6B; /* Medium Navy Blue */
  --text-muted:       #3A4B86;
  --text-dim:         #A1A5B3; /* Cool Gray */

  /* Accents — Deep Navy Blue & Off-White */
  --accent-primary:   #0F1C42; /* Deep Navy Blue */
  --accent-secondary: #1E3A8A; /* Medium Navy Blue */
  --accent-gradient:  #0F1C42; /* Solid Deep Navy */
  --accent-glow:      rgba(15, 28, 66, 0.2);
  --accent-glow-lg:   rgba(15, 28, 66, 0.1);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   40px;
  --space-2xl:  64px;
  --space-3xl:  96px;
  --space-4xl:  120px;

  /* Layout */
  --container:  1200px;
  --nav-h:      72px;

  /* Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;

  /* Transitions */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.7, 0, 0.84, 0);
  --duration:   0.28s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
textarea { resize: vertical; }

/* ── Container ─────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-lg); }
}

/* ── Mono label utility ────────────────────────────────────────────────────── */
.label-mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 13px 30px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  border-radius: var(--radius-sm);
  transition: all var(--duration) var(--ease-out);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-primary);
  color: #FFFFFF; /* High-contrast White on Navy */
  border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  color: #FFFFFF;
  border-color: var(--accent-secondary);
  box-shadow: 0 4px 14px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: #FFFFFF;
  background: var(--accent-primary);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* ── Status badges ─────────────────────────────────────────────────────────── */
.status-badge {
  display: inline-block;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-muted);
  margin-top: var(--space-md);
}

.status-badge-sm {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
}

/* ── Section shared ────────────────────────────────────────────────────────── */
.section {
  padding: var(--space-4xl) 0;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-lg);
  color: var(--accent-primary);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
}

.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent-primary);
  flex-shrink: 0;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.section-body {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

/* ── Reveal animation ──────────────────────────────────────────────────────── */
/* Default: visible. JS upgrades to animated if supported */
.reveal {
  opacity: 1;
  transform: none;
}

.reveal.will-animate {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

.reveal.will-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════════════════════════════
   NAVIGATION
════════════════════════════════════════════════════════════════════════════ */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out),
              backdrop-filter var(--duration) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nav-header.scrolled {
  background: rgba(15, 28, 66, 0.98); /* Navy Blue */
  border-color: rgba(30, 58, 138, 0.3);
}

.nav-header.scrolled .nav-link {
  color: #F9F8F6; /* Off-white */
}

.nav-header.scrolled .nav-link:hover {
  color: #FFFFFF;
}

.nav-header.scrolled .nav-logo-mark img {
  filter: brightness(0) invert(1);
}

.nav-header.scrolled .nav-cta {
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.7);
  background: transparent;
}

.nav-header.scrolled .nav-cta:hover {
  background: #FFFFFF;
  color: #0F1C42;
  border-color: #FFFFFF;
}

.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration) var(--ease-out);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-primary);
  transition: width var(--duration) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link--active { color: var(--text-primary); }

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link--active::after { width: 100%; }

.nav-cta { margin-left: var(--space-md); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}

.hamburger-bar {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all var(--duration) var(--ease-out);
  transform-origin: center;
}

.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
  background: #F9F8F6;
}
.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  background: #F9F8F6;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(15, 28, 66, 0.98); /* Deep Navy Blue */
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.mobile-link {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 600;
  color: #F9F8F6; /* Off-white on Navy */
  transition: color var(--duration) var(--ease-out);
}

.mobile-link:hover,
.mobile-link:focus-visible { color: #FFFFFF; }

.mobile-cta { margin-top: var(--space-lg); }

@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-inner { padding: 0 var(--space-lg); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   HERO
════════════════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
}

.hero.dark-theme {
  background: #0F1C42; /* Deep Navy Blue */
}

.hero.dark-theme::after {
  background:
    radial-gradient(ellipse 80% 70% at 70% 50%, rgba(30, 58, 138, 0.4) 0%, transparent 65%),
    linear-gradient(to bottom, transparent 40%, var(--bg-primary) 100%);
}

.hero.dark-theme .hero-headline {
  color: #F9F8F6; /* Off-White */
}

.hero.dark-theme .accent-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero.dark-theme .hero-body {
  color: #A1A5B3; /* Cool Gray */
}

.hero.dark-theme .hero-pre-label {
  color: #FFFFFF;
}

.hero.dark-theme .hero-pre-label::before {
  background: #FFFFFF;
}

.hero-bg-motif {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.15;
}

/* Canvas — hidden on mobile at CSS level (belt-and-suspenders with JS guard) */
.hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

@media (max-width: 1023px) {
  /* Hide canvas entirely on phones/tablets — prevents iOS WebKit OOM crash.
     A lightweight CSS geometric pattern is used instead. */
  .hero-bg-motif {
    opacity: 0;
    pointer-events: none;
  }

  /* CSS-only subtle hex dot pattern for mobile hero */
  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image:
      radial-gradient(circle, rgba(90, 110, 160, 0.18) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
  }
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Bottom gradient fade-to-page-bg */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 70% at 70% 50%, rgba(253, 251, 247, 0.4) 0%, transparent 65%),
    linear-gradient(to bottom, transparent 40%, var(--bg-primary) 100%);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  width: 100%;
}

/* ── Hero 2-Column Grid Layout ────────────────────────────────────────────── */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.hero-visual-card {
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: 0 15px 35px rgba(15, 28, 66, 0.05);
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out);
}

.hero-visual-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 20px 45px rgba(15, 28, 66, 0.1);
  transform: translateY(-2px);
}

.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-card-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  font-weight: 600;
}

.hero-status-pulse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #39D9FF;
  box-shadow: 0 0 8px #39D9FF;
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-nanotube-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: var(--space-md) 0 var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.hero-nanotube-svg {
  width: 100%;
  max-height: 180px;
  filter: drop-shadow(0 4px 15px rgba(15, 28, 66, 0.08));
}

.nanotube-mesh polygon {
  transition: stroke var(--duration) var(--ease-out), fill var(--duration) var(--ease-out);
}

.hero-visual-card:hover .nanotube-mesh polygon {
  stroke: var(--accent-primary);
}

.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.hero-metric-item {
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-metric-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.hero-metric-val {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Pre-label */
.hero-pre-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.hero-pre-label::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--accent-primary);
}

/* Hero headline */
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  max-width: 820px;
}

/* Hero body */
.hero-body {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Technical labels (annotation style) */
.hero-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.tech-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  opacity: 0.65;
  border: 1px solid rgba(30, 58, 138, 0.25);
  padding: 5px 10px;
  border-radius: 2px;
  background: rgba(253, 251, 247, 0.95);
}

.tl-1 { top: 20%; right: 7%; }
.tl-2 { top: 36%; right: 13%; }
.tl-3 { top: 52%; right: 9%; }
.tl-4 { top: 67%; right: 5%; }
.tl-5 { top: 79%; right: 15%; }

/* Scroll cue */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  z-index: 2;
  text-decoration: none;
  cursor: pointer;
  animation: fadeFloat 2.8s ease-in-out infinite;
  transition: opacity var(--duration) var(--ease-out);
}

.scroll-indicator:hover {
  animation-play-state: paused;
  opacity: 1 !important;
}

.scroll-indicator:hover .label-mono {
  color: var(--accent-primary);
}

.scroll-indicator .label-mono {
  color: var(--text-muted);
  font-size: 0.6rem;
  transition: color var(--duration) var(--ease-out);
}

.scroll-line {
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, var(--accent-primary), transparent);
  animation: scrollPulse 2.8s ease-in-out infinite;
}

@keyframes fadeFloat {
  0%, 100% { opacity: 0.35; transform: translateX(-50%) translateY(0); }
  50%       { opacity: 0.7;  transform: translateX(-50%) translateY(6px); }
}

@keyframes scrollPulse {
  0%    { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%   { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100%  { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}

@media (max-width: 960px) {
  .tech-label { display: none; }
  .hero-content { padding: var(--space-xl) var(--space-lg); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   INTRODUCTION / PIPELINE
════════════════════════════════════════════════════════════════════════════ */
.intro-section { background: var(--bg-secondary); }
.intro-body { max-width: 700px; }

.pipeline {
  display: flex;
  align-items: stretch;
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  gap: var(--space-md);
}

.pipeline-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
  padding: var(--space-xl) var(--space-lg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: border-color var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.pipeline-step:hover {
  border-color: var(--border);
  background: var(--bg-card-hover);
}

.pipeline-icon { color: var(--accent-primary); }

.pipeline-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.pipeline-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pipeline-connector {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding: 0 4px;
}

.pipeline-connector::before {
  content: '→';
  color: var(--text-dim);
  font-size: 1.1rem;
}

@media (max-width: 640px) {
  .pipeline {
    flex-direction: column;
    align-items: center;
  }
  .pipeline-connector::before { content: '↓'; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CHALLENGE
════════════════════════════════════════════════════════════════════════════ */
.challenge-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.challenge-inner { max-width: 1000px; }

.challenge-heading {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 2.9rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: var(--space-2xl);
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.challenge-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  transition: border-color var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.challenge-item:hover {
  border-color: var(--border);
  background: var(--bg-card-hover);
}

.challenge-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  min-width: 30px;
  flex-shrink: 0;
}

.challenge-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
}

.challenge-footer {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

@media (max-width: 768px) {
  .challenge-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .challenge-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   MATERIALS
════════════════════════════════════════════════════════════════════════════ */
.materials-section { background: var(--bg-secondary); }

/* Primary feature card */
.material-primary {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration) var(--ease-out);
}

.material-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), rgba(57,217,255,0.1), transparent);
}

.material-primary:hover { border-color: var(--border-accent); }

.material-primary-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-xl);
}

.material-primary-badge::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--accent-primary);
}

.material-primary-content {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.material-primary-visual {
  display: flex;
  justify-content: center;
}

.swcnt-svg {
  width: 140px;
  height: 140px;
  filter: drop-shadow(0 0 18px rgba(57, 217, 255, 0.25));
  animation: rotateSvg 22s linear infinite;
}

@keyframes rotateSvg {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .swcnt-svg { animation: none; }
}

.material-primary-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}

.material-primary-abbr {
  font-family: var(--font-mono);
  color: var(--accent-primary);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  display: block;
}

.material-primary-desc {
  font-size: 0.9875rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Materials grid */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.material-card {
  padding: var(--space-lg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  transition: border-color var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.material-card:hover {
  border-color: var(--border);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.material-card-abbr {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: block;
}

.material-card-name {
  font-family: var(--font-display);
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.35;
}

@media (max-width: 900px) {
  .material-primary-content { grid-template-columns: 1fr; }
  .material-primary-visual { justify-content: flex-start; }
  .materials-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .materials-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   APPLICATIONS (DARK INDUSTRIAL CONTRAST THEME)
════════════════════════════════════════════════════════════════════════════ */
.applications-section {
  background: #0F1C42; /* Deep Navy Blue */
  color: #F9F8F6;
}

.applications-section .section-heading {
  color: #FFFFFF;
}

.applications-section .section-body {
  color: #A1A5B3;
}

.applications-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.app-card {
  padding: var(--space-xl) var(--space-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: border-color var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
}

.app-card:hover {
  border-color: rgba(57, 217, 255, 0.5);
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
}

.app-card-icon {
  color: #39D9FF;
}

.app-card-icon svg path,
.app-card-icon svg rect,
.app-card-icon svg line {
  stroke: #39D9FF !important;
}

.app-card-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #FFFFFF;
  font-weight: 600;
}

.app-card-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.app-card-list li {
  font-size: 0.9rem;
  color: #D1D5DB;
  padding-left: var(--space-md);
  position: relative;
  line-height: 1.45;
}

.app-card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 1.5px;
  background: #39D9FF;
}

.app-card-note {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-sm);
  margin-top: auto;
}

@media (max-width: 960px) {
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .applications-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   EQUIPMENT
════════════════════════════════════════════════════════════════════════════ */
.equipment-section { background: var(--bg-secondary); }

.equipment-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.equip-card {
  padding: var(--space-xl);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: border-color var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.equip-card:hover {
  border-color: var(--border);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

.equip-card--featured {
  border-color: rgba(57, 217, 255, 0.22);
  background: #111C23;
  position: relative;
}

.equip-card--featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.equip-card--featured:hover { border-color: rgba(57, 217, 255, 0.45); }

.equip-card-abbr {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.equip-card-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.equip-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

@media (max-width: 900px) {
  .equipment-cards { grid-template-columns: 1fr; max-width: 560px; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   REACTOR VISUAL
════════════════════════════════════════════════════════════════════════════ */
.reactor-section {
  background: var(--bg-primary);
  padding: var(--space-4xl) 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.reactor-wrapper {
  display: grid;
  grid-template-columns: 200px auto 200px;
  gap: var(--space-xl);
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}

.reactor-svg-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

#reactor-svg {
  width: 100%;
  max-width: 400px;
  filter: drop-shadow(0 0 50px rgba(57, 217, 255, 0.08));
}

.reactor-flow-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: center;
}

/* Flow animation */
.flow-dash {
  stroke-dasharray: 3 2;
  animation: flowDown 1.4s linear infinite;
}

@keyframes flowDown {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -10; }
}

.mat-dot { animation: matPulse 2s ease-in-out infinite; }
.d1 { animation-delay: 0s; }
.d2 { animation-delay: 0.3s; }
.d3 { animation-delay: 0.6s; }
.d4 { animation-delay: 0.15s; }
.d5 { animation-delay: 0.45s; }

@keyframes matPulse {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 1; }
}

/* Labels */
.reactor-labels { display: flex; flex-direction: column; gap: var(--space-xl); }
.reactor-labels--left  { align-items: flex-end; }
.reactor-labels--right { align-items: flex-start; }

.reactor-label-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.rl-line {
  width: 36px;
  height: 1px;
  background: var(--border);
}

@media (max-width: 768px) {
  .reactor-wrapper { grid-template-columns: 1fr; }
  .reactor-labels  { display: none; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   ENGINEERING FOR SCALE
════════════════════════════════════════════════════════════════════════════ */
.engineering-section { background: var(--bg-secondary); }

.engineering-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.eng-item {
  padding: var(--space-xl);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: border-color var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.eng-item:hover {
  border-color: var(--border);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.eng-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: var(--space-xs);
}

.eng-title {
  font-family: var(--font-display);
  font-size: 1.075rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.015em;
}

.eng-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.eng-item--scale {
  border-color: rgba(155, 225, 93, 0.15);
  background: #0F1A11;
}

.eng-item--scale:hover { border-color: rgba(155, 225, 93, 0.3); }

.scale-steps {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-sm);
}

.scale-step {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scale-step--highlight {
  color: var(--accent-secondary);
  font-weight: 500;
}

.scale-arrow { color: var(--text-dim); font-size: 0.9rem; }

@media (max-width: 900px) {
  .engineering-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .engineering-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   R&D PROGRESSION
════════════════════════════════════════════════════════════════════════════ */
.rd-section { background: var(--bg-primary); }

.rd-progression {
  display: flex;
  align-items: stretch;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  overflow-x: auto;
  padding-bottom: var(--space-sm);
}

.rd-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
  min-width: 160px;
  padding: var(--space-lg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.rd-group--highlight {
  border-color: rgba(155, 225, 93, 0.2);
  background: #0F1A11;
}

.rd-group-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.rd-group--highlight .rd-group-label { color: var(--accent-secondary); }

.rd-steps { display: flex; flex-direction: column; gap: 6px; }

.rd-step {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding-left: var(--space-md);
  border-left: 1px solid var(--border-subtle);
  line-height: 1.5;
}

.rd-step--accent {
  color: var(--accent-secondary);
  border-left-color: rgba(155, 225, 93, 0.35);
}

.rd-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--text-dim);
}

@media (max-width: 768px) {
  .rd-progression { flex-direction: column; }
  .rd-connector svg { transform: rotate(90deg); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   ABOUT
════════════════════════════════════════════════════════════════════════════ */
.about-section { background: var(--bg-secondary); }

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about-secondary { color: var(--text-secondary); }

.about-institutional {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  padding: var(--space-lg);
  border-left: 2px solid var(--border);
  background: var(--bg-card);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: var(--space-xl);
}

/* Ecosystem visual */
.ecosystem {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  padding: var(--space-2xl) var(--space-xl);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.ecosystem-node {
  padding: 9px 20px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: border-color var(--duration) var(--ease-out),
              color var(--duration) var(--ease-out);
  position: relative;
  z-index: 1;
  cursor: default;
}

.ecosystem-node:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.ecosystem-connector {
  width: 1px;
  height: 20px;
  background: var(--border-subtle);
}

.ecosystem-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background: var(--bg-card);
  border: 1px solid var(--accent-primary);
  border-radius: 50%;
  width: 74px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 0 0 30px rgba(57, 217, 255, 0.15);
  transition: box-shadow var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out);
}

@media (max-width: 900px) {
  .about-inner { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOUNDER
════════════════════════════════════════════════════════════════════════════ */
.founder-section,
.team-section { background: var(--bg-primary); }

.founder-card {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  padding: var(--space-2xl);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  max-width: 760px;
  margin: 0 auto;
}

.founder-avatar {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.founder-initials {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.founder-name {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.founder-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-md);
  display: block;
}

.founder-bio {
  font-size: 0.9875rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-md);
}

.founder-location {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .founder-card { flex-direction: column; align-items: flex-start; gap: var(--space-lg); }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════════════════════════════════════ */
.contact-section { background: var(--bg-secondary); }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.contact-detail-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.contact-detail-value {
  font-size: 1.0625rem;
  color: var(--text-primary);
}

.contact-email {
  color: var(--accent-primary);
  transition: color var(--duration) var(--ease-out);
}

.contact-email:hover { color: var(--text-primary); }

/* ── Form ──────────────────────────────────────────────────────────────────── */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.form-label span { color: var(--accent-primary); margin-left: 2px; }

.form-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: 0.9875rem;
  color: var(--text-primary);
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  width: 100%;
  outline: none;
}

.form-input::placeholder { color: var(--text-dim); }

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(57, 217, 255, 0.08);
}

.form-input.error { border-color: #FF6B6B; box-shadow: 0 0 0 3px rgba(255,107,107,0.07); }

.form-textarea { min-height: 130px; }

.form-error {
  font-size: 0.78rem;
  color: #FF6B6B;
  min-height: 18px;
  font-family: var(--font-body);
}

.form-submit {
  width: 100%;
  justify-content: center;
  font-size: 0.9375rem;
  padding: 15px;
  position: relative;
  margin-top: 4px;
}

.form-submit[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-spinner {
  display: none;
  width: 17px;
  height: 17px;
  border: 2px solid rgba(5, 10, 13, 0.25);
  border-top-color: var(--bg-primary);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}

.form-submit.loading .btn-text { opacity: 0; }
.form-submit.loading .btn-spinner { display: block; position: absolute; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

[hidden],
.form-success[hidden],
.form-error-global[hidden] {
  display: none !important;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid rgba(30, 58, 138, 0.3);
  border-radius: var(--radius-sm);
  background: rgba(30, 58, 138, 0.05);
  font-size: 0.9375rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.form-error-global {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: var(--radius-sm);
  background: rgba(220, 38, 38, 0.05);
  font-size: 0.9375rem;
  color: #DC2626;
  font-weight: 500;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .contact-inner { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-2xl);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
  padding-bottom: var(--space-2xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  transition: opacity var(--duration) var(--ease-out);
}

.footer-logo:hover { opacity: 0.7; }

.footer-logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.footer-location {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer-nav { display: flex; justify-content: center; }

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--duration) var(--ease-out);
}

.footer-link:hover,
.footer-link:focus-visible { color: var(--text-primary); }

.footer-social {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
  align-items: flex-start;
}

.social-link {
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: border-color var(--duration) var(--ease-out),
              color var(--duration) var(--ease-out);
}

.social-link:hover,
.social-link:focus-visible {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-lg) 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-social { justify-content: flex-start; }
}

@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom .container { flex-direction: column; align-items: flex-start; }
}