/* ============================================================
   TRANSVERSAL LABS — Global Stylesheet
   Brand System v1.0
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Inter:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

/* ── Design Tokens ── */
:root {
  /* Colors */
  --color-bg-primary:    #F2EDE4;
  --color-bg-secondary:  #E8E1D6;
  --color-bg-card:       #FAF8F4;
  --color-border:        #C8C0B2;
  --color-border-light:  #D9D4CA;

  --color-accent:        #3B82F6;
  --color-accent-dark:   #2563EB;
  --color-accent-ghost:  rgba(59, 130, 246, 0.08);
  --color-accent-glow:   rgba(59, 130, 246, 0.15);

  --color-text-primary:  #1A1A1A;
  --color-text-secondary:#3D3D3D;
  --color-text-muted:    #7A7570;
  --color-text-faint:    #A09890;

  /* Typography */
  --font-display: 'Oswald', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-ui:      'Space Grotesk', sans-serif;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;
  --space-10: 128px;

  /* Layout */
  --max-width: 1120px;
  --nav-height: 68px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition: 0.2s ease;
}

/* ── Base ── */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-9) 0;
}

.section--sm {
  padding: var(--space-7) 0;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(11, 13, 17, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Logo mark + wordmark */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.nav__logo-img {
  width: 40px;
  height: 40px;
  display: block;
  flex-shrink: 0;
}

.nav__logo-mark svg {
  display: block;
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.nav__logo-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #F8FAFC;
}

.nav__logo-sub {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #9CA3AF;
  margin-top: 4px;
}

.nav__link {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: #9CA3AF;          /* medium gray — readable on dark nav */
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: #F8FAFC;          /* near-white — clear active/hover state on dark nav */
}

.nav__cta {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-bg-primary);
  background: var(--color-accent);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Typography ── */
.eyebrow {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-3);
}

h1, .h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.05;
  color: var(--color-text-primary);
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.1;
  color: var(--color-text-primary);
}

h3, .h3 {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-primary);
}

.tagline {
  font-family: var(--font-body);
  font-size: clamp(16px, 2vw, 20px);
  font-style: italic;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

p {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

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

.btn--primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent-ghost);
  transform: translateY(-2px);
}

.btn--ghost {
  background: var(--color-accent-ghost);
  color: var(--color-accent);
}

.btn--ghost:hover {
  background: rgba(59, 130, 246, 0.18);
  transform: translateY(-2px);
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition), transform var(--transition);
}

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

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-7) 0;
}

/* ── Tags / Pills ── */
.tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.tag--accent {
  color: var(--color-accent);
  border-color: rgba(59, 130, 246, 0.3);
  background: var(--color-accent-ghost);
}

/* ── Section header ── */
.section-header {
  margin-bottom: var(--space-8);
}

.section-header p {
  max-width: 560px;
  margin-top: var(--space-4);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 0;
  margin-top: var(--space-9);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-primary);
}

.footer__links {
  display: flex;
  gap: var(--space-5);
}

.footer__link {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.footer__copy {
  font-size: 12px;
  color: var(--color-text-muted);
  width: 100%;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ── Logo SVG mark (reusable) ── */
.logo-mark { display: block; flex-shrink: 0; }

/* ── Utility ── */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-2       { gap: var(--space-2); }
.gap-3       { gap: var(--space-3); }
.gap-4       { gap: var(--space-4); }
.gap-5       { gap: var(--space-5); }
.mt-4        { margin-top: var(--space-4); }
.mt-5        { margin-top: var(--space-5); }
.mt-6        { margin-top: var(--space-6); }
.mt-7        { margin-top: var(--space-7); }

/* Nav links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #0B0D11;
    border-bottom: 1px solid #2A3040;
    padding: var(--space-5) var(--space-6);
    gap: var(--space-5);
  }
  .nav__toggle { display: flex; }
  .nav__cta { display: none; }
  .container { padding: 0 var(--space-5); }
  .section { padding: var(--space-7) 0; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
}