/* ============================================================
   AiRA Framework — Design System
   Typography: Playfair Display (headings) + DM Sans (body)
   Palette: Editorial Warm — light theme, sharp edges, shadows
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500&family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Background */
  --bg-primary: #fefefe;
  --bg-secondary: #f5f3ef;
  --bg-tertiary: #ede9e3;
  --bg-inverse: #141311;

  /* Text */
  --text-primary: #141311;
  --text-secondary: #5c5550;
  --text-muted: #8c8580;
  --text-inverse: #fefefe;

  /* Accent */
  --accent: #2c5282;
  --accent-hover: #1a3a5c;
  --accent-light: #ebf2fa;
  --accent-secondary: #1e6b6b;
  --accent-secondary-hover: #155555;
  --accent-secondary-light: #e8f5f5;

  /* Border */
  --border: #d9d3cc;
  --border-light: #ebe5de;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(20, 19, 17, 0.06);
  --shadow-md: 0 4px 12px rgba(20, 19, 17, 0.08);
  --shadow-lg: 0 12px 40px rgba(20, 19, 17, 0.10);
  --shadow-xl: 0 20px 60px rgba(20, 19, 17, 0.12);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Container */
  --container-max: 1280px;
  --container-narrow: 900px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-hover);
}

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

video {
  max-width: 100%;
  display: block;
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

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

.section--sm { padding: var(--space-3xl) 0; }
.section--lg { padding: 120px 0; }

.section__label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: var(--space-md);
  display: block;
}

.section__title {
  margin-bottom: var(--space-md);
}

.section__subtitle {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

/* ── Grid ── */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* ── Flex Utilities ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.text-center { text-align: center; }

/* ── Header / Navigation ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(254, 254, 254, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.header__logo span {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.header__link:hover,
.header__link--active {
  color: var(--text-primary);
}

.header__link:hover::after,
.header__link--active::after {
  width: 100%;
}

.header__cta {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 24px;
  background: var(--accent);
  color: var(--text-inverse);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.header__cta:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-md);
  color: var(--text-inverse);
}

/* Mobile menu toggle */
.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.header__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Sidebar overlay (mobile only — hidden by default on desktop) */
.header__overlay {
  display: none;
}

/* Sidebar header row — hidden on desktop, shown inside sidebar on mobile */
.header__nav-header {
  display: none;
}

/* ── Footer ── */
.footer {
  background: var(--bg-inverse);
  color: var(--text-inverse);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

.footer__brand p {
  color: rgba(254, 254, 254, 0.6);
  font-size: 0.9rem;
  margin-top: var(--space-md);
  max-width: 320px;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(254, 254, 254, 0.4);
  margin-bottom: var(--space-lg);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  color: rgba(254, 254, 254, 0.7);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--text-inverse);
}

.footer__bottom {
  border-top: 1px solid rgba(254, 254, 254, 0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(254, 254, 254, 0.4);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 12px 28px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-md);
  color: var(--text-inverse);
}

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

.btn--secondary:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

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

.btn--outline:hover {
  background: var(--accent);
  color: var(--text-inverse);
}

.btn--lg {
  padding: 16px 36px;
  font-size: 1rem;
}

/* ── Cards ── */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  color: var(--accent);
  margin-bottom: var(--space-lg);
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.card__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ── Stat ── */
.stat {
  text-align: center;
  padding: var(--space-lg);
}

.stat__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat__label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  width: 100%;
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__image-card {
  width: 100%;
  max-width: 520px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-xl);
  position: relative;
}

.hero__image-card::before {
  content: '';
  position: absolute;
  top: -16px;
  left: -16px;
  right: 16px;
  bottom: 16px;
  border: 2px solid var(--accent);
  opacity: 0.3;
  z-index: -1;
  pointer-events: none;
}

.hero__image-card img {
  width: 100%;
  height: auto;
  display: block;
}

.hero__badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  background: var(--accent-light);
  padding: 8px 16px;
  margin-bottom: var(--space-xl);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 5.5vw, 5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
  color: var(--text-primary);
}

.hero__title em {
  font-style: italic;
  color: var(--accent);
}

.hero__text {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: var(--space-xl);
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

/* ── Section Divider ── */
.divider {
  border: none;
  height: 1px;
  background: var(--border-light);
  margin: 0;
}

/* ── Page Header ── */
.page-header {
  padding: 120px 0 var(--space-3xl);
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
}

.page-header__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

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

/* ── Feature Block ── */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  padding: var(--space-3xl) 0;
}

.feature-block--reverse .feature-block__media {
  order: -1;
}

.feature-block__label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: var(--space-md);
  display: block;
}

.feature-block__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.feature-block__text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.feature-block__media img {
  width: 100%;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
}

/* ── Architecture Diagram ── */
.architecture {
  width: 100%;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  margin: var(--space-xl) 0;
}

/* ── Step Flow ── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  counter-reset: step;
}

.step {
  position: relative;
  padding: var(--space-xl);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  counter-increment: step;
}

.step::before {
  content: '0' counter(step);
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.2;
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  line-height: 1;
}

.step__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.step__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

.step__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-secondary);
  background: var(--accent-secondary-light);
  padding: 4px 10px;
  margin-top: var(--space-md);
}

/* ── Quote / Testimonial ── */
.quote {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-3xl) 0;
}

.quote__text {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-style: italic;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.quote__attribution {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

/* ── Video Grid ── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 380px));
  gap: var(--space-xl);
  justify-content: center;
}

.video-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  max-width: 420px;
  margin: 0 auto;
}

.video-card video {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  background: #000;
}

.video-card__body {
  padding: var(--space-lg);
}

.video-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.video-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ── List Styles ── */
.list-check {
  list-style: none;
  padding: 0;
}

.list-check li {
  position: relative;
  padding-left: 28px;
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.list-check li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--accent-secondary-light);
  border: 2px solid var(--accent-secondary);
}

.list-check li::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--accent-secondary);
  border-bottom: 2px solid var(--accent-secondary);
  transform: rotate(-45deg);
}

/* ── Table ── */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border);
}

th {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-align: left;
  padding: var(--space-md) var(--space-lg);
}

td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: top;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--bg-secondary);
}

/* ── Tag ── */
.tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.tag--accent {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
}

.tag--secondary {
  color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  background: var(--accent-secondary-light);
}

/* ── CTA Banner ── */
.cta-banner {
  background: var(--bg-inverse);
  color: var(--text-inverse);
  padding: var(--space-3xl);
  text-align: center;
}

.cta-banner__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-inverse);
}

.cta-banner__text {
  font-size: 1.1rem;
  color: rgba(254, 254, 254, 0.6);
  max-width: 560px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
}

.cta-banner .btn--primary {
  background: var(--text-inverse);
  color: var(--bg-inverse);
  box-shadow: none;
}

.cta-banner .btn--primary:hover {
  background: rgba(254, 254, 254, 0.88);
  box-shadow: var(--shadow-lg);
}

.cta-banner .btn--outline {
  border-color: rgba(254, 254, 254, 0.3);
  color: var(--text-inverse);
}

.cta-banner .btn--outline:hover {
  border-color: var(--text-inverse);
  background: transparent;
}

/* ── Roadmap Timeline ── */
.timeline {
  position: relative;
  padding-left: 40px;
}

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

.timeline__item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -45px;
  top: 4px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--accent);
  background: var(--bg-primary);
}

.timeline__item--done::before {
  background: var(--accent);
}

.timeline__item--active::before {
  background: var(--bg-primary);
  box-shadow: 0 0 0 4px rgba(44, 82, 130, 0.2);
}

.timeline__priority {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.timeline__priority--high { color: var(--accent); }
.timeline__priority--medium { color: var(--accent-secondary); }
.timeline__priority--low { color: var(--text-muted); }

.timeline__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.timeline__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ── Contact Form ── */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  padding: 12px 16px;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath stroke='%235c5550' stroke-width='2' d='m1 1 5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  cursor: pointer;
}

/* ── Contact Layout ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info__item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  color: var(--accent);
}

.contact-info__icon svg {
  width: 20px;
  height: 20px;
}

.contact-info__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-info__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ── Partner Grid ── */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-lg);
}

.partner-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.partner-card:hover {
  box-shadow: var(--shadow-md);
}

.partner-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.partner-card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.partner-card__text {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ── Inline Logo ── */
.inline-logo {
  height: 40px;
  width: auto;
  display: inline-block;
  vertical-align: middle;
}

/* ── Stats Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.stats-grid .stat {
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — Mobile-First Overrides
   Desktop is perfect. These rules ONLY activate ≤1024px.
   ═══════════════════════════════════════════════════════════ */

/* ── Tablet (≤1024px) ── */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--auto { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }

  .feature-block {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .feature-block--reverse .feature-block__media { order: 0; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }

  /* Hero tablet */
  .hero__inner { grid-template-columns: 1fr; gap: var(--space-2xl); text-align: center; }
  .hero__content { order: 0; }
  .hero__visual { order: 1; }
  .hero__image-card { max-width: 360px; margin: 0 auto; }
  .hero__text { max-width: 100%; margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }

  /* Use-case blocks */
  .use-case-block { grid-template-columns: 1fr; }

  /* Page header */
  .page-header { padding: 110px 0 var(--space-2xl); }

  /* Container */
  .container { padding: 0 var(--space-lg); }
}

/* ── Mobile (≤768px) ── */
@media (max-width: 768px) {
  /* Spacing variables */
  :root {
    --space-4xl: 48px;
    --space-3xl: 36px;
    --space-2xl: 28px;
    --space-xl: 24px;
    --space-lg: 20px;
  }

  /* ── Header ── */
  .header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .header__inner {
    height: 60px;
    padding: 0 var(--space-md);
  }
  .header__logo img { height: 30px; }
  .header__logo span { font-size: 1.2rem; }
  .header__cta { display: none; }
  .header__toggle {
    display: flex;
    position: relative;
    z-index: 100;
  }

  /* ── Sidebar Overlay / Backdrop ── */
  .header__overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(20, 19, 17, 0.45);
    z-index: 101;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .header__overlay--visible {
    opacity: 1;
    pointer-events: auto;
  }

  /* ── Sidebar Navigation ── */
  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    max-width: 82vw;
    background: var(--bg-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-2xl);
    gap: var(--space-xs);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 102;
    overflow-y: auto;
    overscroll-behavior: contain;
    box-shadow: -8px 0 32px rgba(20, 19, 17, 0.1);
    border-left: 1px solid var(--border-light);
    border-top: none;
  }
  .header__nav--open { transform: translateX(0); }

  /* Sidebar header row (label + close button) */
  .header__nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-light);
  }
  .header__nav-header span {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
  }
  .header__nav-close {
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
  }
  .header__nav-close:hover {
    color: var(--text-primary);
  }
  .header__nav-close svg {
    width: 20px;
    height: 20px;
  }

  /* Sidebar nav links */
  .header__nav .header__link {
    font-size: 1.05rem;
    padding: var(--space-sm) 0;
    width: 100%;
  }
  .header__nav .header__link::after {
    display: none;
  }

  /* ── Hamburger to X animation ── */
  .header__toggle--open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .header__toggle--open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .header__toggle--open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ── Typography ── */
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.55rem; }
  h3 { font-size: 1.2rem; }
  h4 { font-size: 1.1rem; }
  .section__subtitle { font-size: 0.95rem; }

  /* ── Page header ── */
  .page-header {
    padding: 96px 0 var(--space-xl);
  }
  .page-header__title { font-size: 2rem; }
  .page-header__text { font-size: 0.95rem; max-width: 100%; }

  /* ── Hero ── */
  .hero {
    min-height: auto;
    padding: 96px 0 var(--space-xl);
  }
  .hero__inner { padding: 0 var(--space-md); }
  .hero__title { font-size: 1.85rem; line-height: 1.15; }
  .hero__text { font-size: 0.95rem; line-height: 1.6; }
  .hero__badge { font-size: 0.65rem; padding: 6px 10px; letter-spacing: 0.1em; }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
    width: 100%;
  }
  .hero__actions .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  /* ── Grids (all single-column) ── */
  .grid--2, .grid--3, .grid--4, .grid--auto { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
  .video-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
  }

  /* ── Sections ── */
  .section { padding: var(--space-3xl) 0; }
  .section--sm { padding: var(--space-2xl) 0; }
  .section__label { font-size: 0.65rem; margin-bottom: var(--space-sm); }

  /* ── Cards ── */
  .card { padding: var(--space-lg); }
  .card__icon { width: 40px; height: 40px; margin-bottom: var(--space-md); }
  .card__title { font-size: 1.15rem; }
  .card__text { font-size: 0.9rem; }

  /* ── Stats ── */
  .stat { padding: var(--space-md); }
  .stat__number { font-size: 2rem; }
  .stat__label { font-size: 0.75rem; }

  /* ── Steps ── */
  .step { padding: var(--space-lg); }
  .step::before { font-size: 2.5rem; top: var(--space-md); right: var(--space-md); }
  .step__title { font-size: 1.15rem; }

  /* ── Feature blocks ── */
  .feature-block { padding: var(--space-xl) 0; }
  .feature-block__title { font-size: 1.4rem; }
  .feature-block__text { font-size: 0.95rem; }
  .feature-block__media { margin-top: var(--space-lg); }

  /* ── Use-case blocks (Solutions page) ── */
  .use-case-block {
    grid-template-columns: 1fr;
    padding: var(--space-lg);
    gap: var(--space-lg);
  }
  .use-case-block__media { min-height: 160px; }

  /* ── Timeline (Roadmap page) ── */
  .timeline { padding-left: 24px; }
  .timeline::before { left: 4px; }
  .timeline__item::before { left: -28px; width: 10px; height: 10px; top: 6px; }
  .timeline__item { padding-bottom: var(--space-lg); }
  .timeline__title { font-size: 1.1rem; }

  /* ── Tables ── */
  th, td { padding: var(--space-sm) var(--space-md); font-size: 0.8rem; }

  /* ── Video cards ── */
  .video-card { max-width: 100%; }
  .video-card__body { padding: var(--space-md); }
  .video-card__title { font-size: 1.05rem; }

  /* ── Contact form ── */
  .form-label { font-size: 0.7rem; }
  .form-input, .form-select, .form-textarea { padding: 10px 14px; font-size: 0.9rem; }
  .form-textarea { min-height: 120px; }

  /* ── Contact info ── */
  .contact-info__item { gap: var(--space-sm); margin-bottom: var(--space-lg); }
  .contact-info__icon { width: 40px; height: 40px; }
  .contact-info__title { font-size: 1rem; }

  /* ── Partner cards ── */
  .partner-card { padding: var(--space-lg) var(--space-md); }
  .partner-card__title { font-size: 0.9rem; }
  .partner-card__text { font-size: 0.8rem; }

  /* ── CTA Banner ── */
  .cta-banner {
    padding: var(--space-2xl) var(--space-lg);
  }
  .cta-banner__title { font-size: 1.45rem; }
  .cta-banner__text { font-size: 0.9rem; max-width: 100%; }
  .cta-banner .btn { width: 100%; justify-content: center; }

  /* ── Highlight box ── */
  .highlight-box { padding: var(--space-md); }

  /* ── Buttons ── */
  .btn { padding: 10px 20px; font-size: 0.85rem; }
  .btn--lg { padding: 14px 28px; font-size: 0.9rem; }

  /* ── Footer ── */
  .footer {
    padding: var(--space-2xl) 0 var(--space-xl);
  }
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
    font-size: 0.75rem;
  }
  .footer__brand p { font-size: 0.85rem; max-width: 100%; }

  /* ── Container ── */
  .container { padding: 0 var(--space-md); }

  /* ── Architecture diagram ── */
  .architecture { margin: var(--space-lg) 0; }

  /* ── Newsletter form (contact page) ── */
  .newsletter-form {
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 100%;
  }
  .newsletter-form .btn { width: 100%; }
}

/* ── Small Mobile (≤480px) ── */
@media (max-width: 480px) {
  /* Tighter spacing */
  :root {
    --space-4xl: 36px;
    --space-3xl: 28px;
    --space-2xl: 24px;
    --space-xl: 20px;
    --space-lg: 16px;
    --space-md: 14px;
  }

  .container { padding: 0 var(--space-md); }

  /* Typography */
  h1 { font-size: 1.65rem; }
  h2 { font-size: 1.35rem; }
  h3 { font-size: 1.1rem; }
  .page-header { padding: 84px 0 var(--space-lg); }
  .page-header__title { font-size: 1.75rem; }
  .page-header__text { font-size: 0.9rem; }

  /* Hero */
  .hero { padding: 84px 0 var(--space-lg); }
  .hero__title { font-size: 1.65rem; }
  .hero__text { font-size: 0.9rem; }

  /* All grids single-column */
  .stats-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: 1fr; }
  .grid--auto { grid-template-columns: 1fr; }

  /* Stats */
  .stat__number { font-size: 1.75rem; }

  /* Cards */
  .card { padding: var(--space-md); }

  /* Footer */
  .footer__heading { font-size: 0.7rem; }
  .footer__links a { font-size: 0.85rem; }

  /* Buttons */
  .btn--lg { padding: 12px 20px; font-size: 0.85rem; }

  /* Video cards */
  .video-card__body { padding: var(--space-md); }

  /* CTA */
  .cta-banner { padding: var(--space-xl) var(--space-md); }
  .cta-banner__title { font-size: 1.3rem; }

  /* Quote */
  .quote__text { font-size: 1.15rem; }
}

/* ── Animation utilities ── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Highlight box ── */
.highlight-box {
  background: var(--accent-secondary-light);
  border-left: 4px solid var(--accent-secondary);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.highlight-box__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--accent-secondary);
}

.highlight-box__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent);
}

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

/* ── SR Only ── */
.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;
}

/* ── Three.js Background Canvas ── */
#three-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
}

/* ═══════════════════════════════════════════════════════════
   PAGE TRANSITIONS — 7 Unique Variants, One Per Page
   ═══════════════════════════════════════════════════════════ */

.transition-curtain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  pointer-events: none;
}

/* ── Shared panel base ── */
.transition-curtain__panel {
  position: absolute;
  background: #1a3a5c;
  overflow: hidden;
  transition: transform 0.65s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Geometric pattern on all panels */
.transition-curtain__panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(44, 82, 130, 0.3) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(44, 82, 130, 0.3) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(44, 82, 130, 0.3) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(44, 82, 130, 0.3) 75%);
  background-size: 40px 40px;
  background-position: 0 0, 0 20px, 20px -20px, -20px 0;
  opacity: 0.12;
}

/* No transition class — applied briefly to prevent initial animation flash */
.transition-curtain--instant .transition-curtain__panel,
.transition-curtain--instant.transition-curtain__overlay {
  transition: none !important;
}

/* ── Logo mark ── */
.transition-curtain__mark {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10000;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease 0.3s;
}
.transition-curtain__mark svg {
  width: 64px;
  height: 64px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
}
.transition-curtain--open .transition-curtain__mark {
  opacity: 0;
  transition: opacity 0.2s ease;
}

/* ═══════════════════════════════════════════════════
   VARIANT 1: --reveal (index.html — Home)
   Full overlay shrinks + fades from center. Grand entrance.
   ═══════════════════════════════════════════════════ */
.transition-curtain--reveal .transition-curtain__overlay {
  position: absolute;
  inset: 0;
  background: #1a3a5c;
  transition: transform 0.7s cubic-bezier(0.65, 0, 0.35, 1), opacity 0.5s ease 0.15s;
  transform: scale(1);
  opacity: 1;
}
.transition-curtain--reveal .transition-curtain__overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(44, 82, 130, 0.3) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(44, 82, 130, 0.3) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(44, 82, 130, 0.3) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(44, 82, 130, 0.3) 75%);
  background-size: 40px 40px;
  background-position: 0 0, 0 20px, 20px -20px, -20px 0;
  opacity: 0.12;
}
.transition-curtain--reveal.transition-curtain--open .transition-curtain__overlay {
  transform: scale(0);
  opacity: 0;
}

/* ═══════════════════════════════════════════════════
   VARIANT 2: --ascend (about.html — About)
   Single panel lifts upward. Information rising.
   ═══════════════════════════════════════════════════ */
.transition-curtain--ascend .transition-curtain__panel {
  inset: 0;
  transition: transform 0.7s cubic-bezier(0.65, 0, 0.35, 1);
  transform: translateY(0);
}
.transition-curtain--ascend.transition-curtain--open .transition-curtain__panel {
  transform: translateY(-100%);
}

/* ═══════════════════════════════════════════════════
   VARIANT 3: --split (features.html — Features)
   Two panels split left/right. Architecture unfolding.
   ═══════════════════════════════════════════════════ */
.transition-curtain--split {
  display: flex;
}
.transition-curtain--split .transition-curtain__panel--left {
  position: relative;
  width: 50%;
  height: 100%;
  flex: none;
  transform: translateX(0);
}
.transition-curtain--split .transition-curtain__panel--right {
  position: relative;
  width: 50%;
  height: 100%;
  flex: none;
  transform: translateX(0);
}
.transition-curtain--split.transition-curtain--open .transition-curtain__panel--left {
  transform: translateX(-100%);
}
.transition-curtain--split.transition-curtain--open .transition-curtain__panel--right {
  transform: translateX(100%);
}

/* ═══════════════════════════════════════════════════
   VARIANT 4: --vertical (solutions.html — Solutions)
   Two bars separate top/bottom. Sectors expanding.
   ═══════════════════════════════════════════════════ */
.transition-curtain--vertical .transition-curtain__panel--top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  transform: translateY(0);
}
.transition-curtain--vertical .transition-curtain__panel--bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50%;
  transform: translateY(0);
}
.transition-curtain--vertical.transition-curtain--open .transition-curtain__panel--top {
  transform: translateY(-100%);
}
.transition-curtain--vertical.transition-curtain--open .transition-curtain__panel--bottom {
  transform: translateY(100%);
}

/* ═══════════════════════════════════════════════════
   VARIANT 5: --slide-left (demo.html — Demo)
   Panel slides left with skew. Cinematic pan reveal.
   ═══════════════════════════════════════════════════ */
.transition-curtain--slide-left .transition-curtain__panel {
  inset: 0;
  transition: transform 0.7s cubic-bezier(0.7, 0, 0.3, 1);
  transform: translateX(0) skewX(0deg);
}
.transition-curtain--slide-left.transition-curtain--open .transition-curtain__panel {
  transform: translateX(-105%) skewX(-3deg);
}

/* ═══════════════════════════════════════════════════
   VARIANT 6: --wipe (roadmap.html — Roadmap)
   Panel wipes diagonally. Forward momentum.
   ═══════════════════════════════════════════════════ */
.transition-curtain--wipe .transition-curtain__panel {
  inset: 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  transition: clip-path 0.7s cubic-bezier(0.65, 0, 0.35, 1);
}
.transition-curtain--wipe.transition-curtain--open .transition-curtain__panel {
  clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
}

/* ═══════════════════════════════════════════════════
   VARIANT 7: --descend (contact.html — Contact)
   Panel drops down. Gateway opening.
   ═══════════════════════════════════════════════════ */
.transition-curtain--descend .transition-curtain__panel {
  inset: 0;
  transition: transform 0.7s cubic-bezier(0.65, 0, 0.35, 1);
  transform: translateY(0);
}
.transition-curtain--descend.transition-curtain--open .transition-curtain__panel {
  transform: translateY(100%);
}