/* ============================================================
   cyber-defence.ai — EmilyAI
   Three-theme stylesheet: light · dark · terminal (VT100)
   ============================================================ */

/* --- CSS Custom Properties ---------------------------------- */
:root {
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --transition-speed: 0.3s;
  --border-radius: 0.5rem;
  --max-width: 1140px;
}

/* ---------- DARK THEME (default, matches socinabox) ---------- */
[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1c1c1c;
  --bg-nav: rgba(10,10,10,0.95);
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent: #00e5a0;
  --accent-hover: #00cc8e;
  --accent-dim: rgba(0,229,160,0.1);
  --accent-border: rgba(0,229,160,0.2);
  --border: #222222;
  --border-light: #1a1a1a;
  --link: #00e5a0;
  --link-hover: #ffffff;
  --badge-bg: rgba(0,229,160,0.12);
  --badge-text: #00e5a0;
  --blockquote-bg: #111111;
  --blockquote-border: #00e5a0;
  --hero-gradient: linear-gradient(180deg, #0a0a0a 0%, #0d1a14 100%);
  --code-bg: #1a1a1a;
}

/* ---------- LIGHT THEME ------------------------------------- */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;
  --bg-nav: rgba(255,255,255,0.97);
  --text-primary: #111111;
  --text-secondary: #555555;
  --text-muted: #999999;
  --accent: #007a52;
  --accent-hover: #005c3e;
  --accent-dim: rgba(0,122,82,0.06);
  --accent-border: rgba(0,122,82,0.15);
  --border: #e0e0e0;
  --border-light: #eeeeee;
  --link: #007a52;
  --link-hover: #111111;
  --badge-bg: rgba(0,122,82,0.08);
  --badge-text: #007a52;
  --blockquote-bg: #f9f9f9;
  --blockquote-border: #007a52;
  --hero-gradient: linear-gradient(180deg, #ffffff 0%, #f0faf5 100%);
  --code-bg: #f3f3f3;
}

/* ---------- VT100 TERMINAL THEME ---------------------------- */
[data-theme="terminal"] {
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: #0a0a0a;
  --bg-card-hover: #111111;
  --bg-nav: rgba(0,0,0,0.98);
  --text-primary: #33ff33;
  --text-secondary: #22aa22;
  --text-muted: #116611;
  --accent: #33ff33;
  --accent-hover: #66ff66;
  --accent-dim: rgba(51,255,51,0.05);
  --accent-border: rgba(51,255,51,0.2);
  --border: #1a3a1a;
  --border-light: #112211;
  --link: #33ff33;
  --link-hover: #66ff66;
  --badge-bg: rgba(51,255,51,0.08);
  --badge-text: #33ff33;
  --blockquote-bg: #050505;
  --blockquote-border: #33ff33;
  --hero-gradient: linear-gradient(180deg, #000000 0%, #001a00 100%);
  --code-bg: #0a0a0a;
}

[data-theme="terminal"] * {
  font-family: 'IBM Plex Mono', 'Courier New', monospace !important;
  border-radius: 0 !important;
}

[data-theme="terminal"] body {
  text-shadow: 0 0 3px rgba(51,255,51,0.3);
}

[data-theme="terminal"] .btn {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid #33ff33 !important;
}

[data-theme="terminal"] .card,
[data-theme="terminal"] .stat-card,
[data-theme="terminal"] .feature-card {
  border: 1px solid #1a3a1a !important;
}

/* Scanline overlay for terminal mode */
[data-theme="terminal"] body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.15) 2px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* --- Global Reset & Base ------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition-speed), color var(--transition-speed);
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color var(--transition-speed);
}
a:hover { color: var(--link-hover); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

h2 em, h1 em {
  font-style: italic;
  color: var(--accent);
}

p { color: var(--text-secondary); max-width: 70ch; }

img { max-width: 100%; height: auto; }

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* --- Navigation --------------------------------------------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-speed);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav-brand span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-speed);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme switcher */
.theme-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 2rem;
  padding: 0.2rem;
}

.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  border-radius: 2rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: all var(--transition-speed);
  line-height: 1;
}
.theme-btn:hover { color: var(--text-primary); }
.theme-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 991px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-nav);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
    gap: 1rem;
  }
  .nav-links.open { display: flex; }
}

/* --- Buttons ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-speed);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg-primary);
  transform: translateY(-1px);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* --- Hero --------------------------------------------------- */
.hero {
  background: var(--hero-gradient);
  padding: 10rem 1.5rem 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 50% 60%, var(--accent-dim), transparent);
  pointer-events: none;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
  padding: 0.4rem 1rem;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 2rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.15rem;
  margin: 0 auto 2.5rem;
  max-width: 600px;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Stat Cards --------------------------------------------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: -3rem auto 0;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  transition: border-color var(--transition-speed);
}
.stat-card:hover { border-color: var(--accent-border); }

.stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Sections ----------------------------------------------- */
.section {
  padding: 6rem 1.5rem;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.section h2 {
  margin-bottom: 1rem;
}

.section > .section-inner > p.section-lead {
  font-size: 1.05rem;
  margin-bottom: 3rem;
}

.bg-alt { background: var(--bg-secondary); }

/* --- Feature Cards ------------------------------------------ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: border-color var(--transition-speed), transform var(--transition-speed);
}
.feature-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-size: 1.2rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.feature-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* --- How it Works / Process --------------------------------- */
.process-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 3rem;
  position: relative;
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.process-step:last-child { border-bottom: none; }

.step-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
}

.process-step h3 {
  margin-bottom: 0.5rem;
}

.process-step p {
  margin: 0;
  font-size: 0.95rem;
}

/* --- Architecture Diagram ----------------------------------- */
.architecture-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
  margin-top: 3rem;
  text-align: center;
}

.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin: 2rem 0;
}

.arch-node {
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: var(--border-radius);
  padding: 1rem 1.5rem;
  min-width: 140px;
  text-align: center;
}

.arch-node-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.25rem;
}

.arch-node-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.arch-arrow {
  color: var(--accent);
  font-size: 1.2rem;
  padding: 0 0.75rem;
  opacity: 0.5;
}

.arch-node.emily {
  background: var(--accent);
  border-color: var(--accent);
}
.arch-node.emily .arch-node-label,
.arch-node.emily .arch-node-name {
  color: var(--bg-primary);
}

/* --- Testimonials / Quotes ---------------------------------- */
.quote-card {
  background: var(--blockquote-bg);
  border-left: 3px solid var(--blockquote-border);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  padding: 2rem;
  margin: 2rem 0;
}

.quote-card blockquote {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.7;
}

.quote-card cite {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: normal;
}

/* --- Timeline ----------------------------------------------- */
.timeline {
  margin-top: 3rem;
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-primary);
  transform: translateX(-4px);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.timeline-item h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.timeline-item p {
  font-size: 0.9rem;
  margin: 0;
}

/* --- FAQ Accordion ------------------------------------------ */
.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  padding: 1.25rem 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition-speed);
}
.faq-question:hover { color: var(--accent); }

.faq-question i {
  transition: transform var(--transition-speed);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.faq-item.open .faq-question i { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: 1.25rem;
}

.faq-answer p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Distinction Cards -------------------------------------- */
.distinction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.distinction-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: border-color var(--transition-speed), transform var(--transition-speed);
}
.distinction-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.distinction-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
  font-size: 1.2rem;
}

.distinction-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.distinction-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* --- Engine Cards ------------------------------------------- */
.engine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.engine-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: border-color var(--transition-speed), transform var(--transition-speed);
  position: relative;
}
.engine-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.engine-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.2;
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}

.engine-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.engine-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* --- Info Cards Row ----------------------------------------- */
.info-cards-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: border-color var(--transition-speed);
}
.info-card:hover {
  border-color: var(--accent-border);
}

.info-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.info-card h3 i {
  color: var(--accent);
  font-size: 0.9rem;
}

.info-card p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* --- Knowledge Split ---------------------------------------- */
.knowledge-split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.knowledge-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
}

.knowledge-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.knowledge-header i {
  color: var(--accent);
  font-size: 1.3rem;
}

.knowledge-header h3 {
  margin: 0;
  font-size: 1.2rem;
}

.knowledge-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.6rem;
  border-radius: 2rem;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.emily-tag {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
}

.knowledge-col p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.knowledge-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.knowledge-list li {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

.knowledge-list li strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.25rem;
}

/* --- Limitations -------------------------------------------- */
.limitations-list {
  margin-top: 2rem;
}

.limitation-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}
.limitation-item:last-child {
  border-bottom: none;
}

.limitation-item h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.limitation-item h3 i {
  color: var(--accent);
  font-size: 0.85rem;
}

.limitation-item p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* --- CTA Banner --------------------------------------------- */
.cta-banner {
  text-align: center;
  padding: 5rem 1.5rem;
  background: var(--hero-gradient);
  position: relative;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 500px 300px at 50% 50%, var(--accent-dim), transparent);
  pointer-events: none;
}

.cta-banner .section-inner { position: relative; z-index: 1; }

.cta-banner h2 { margin-bottom: 1rem; }

.cta-banner p {
  margin: 0 auto 2rem;
  max-width: 550px;
}

.cta-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1.5rem;
}

/* --- Footer ------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.footer-brand span { color: var(--accent); }

.footer-links {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li { margin-bottom: 0.4rem; }

.footer-col a {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Utility ------------------------------------------------ */
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }

/* --- Animations --------------------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* --- Responsive --------------------------------------------- */
@media (max-width: 768px) {
  .hero { padding: 8rem 1.5rem 5rem; }
  .stats-row { grid-template-columns: repeat(2, 1fr); margin-top: -2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .distinction-grid { grid-template-columns: 1fr; }
  .engine-grid { grid-template-columns: 1fr; }
  .info-cards-row { grid-template-columns: 1fr; }
  .knowledge-split { grid-template-columns: 1fr; }
  .arch-flow { flex-direction: column; }
  .arch-arrow { transform: rotate(90deg); padding: 0.5rem 0; }
  .process-step { grid-template-columns: 50px 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 1.5rem; }
}

/* --- Print -------------------------------------------------- */
@media print {
  .site-nav, .theme-switcher, .nav-toggle, .cta-banner { display: none; }
  body { color: #000; background: #fff; }
}