/* ==========================================================================
   Triple Thread Labs — shared stylesheet
   Design system v2 ("Spec Sheet"). See brand-reference for full source of truth.
   ========================================================================== */

:root {
  /* Color */
  --black: #111111;
  --charcoal: #272727;
  --warm-gray: #4A4844;
  --mid-gray: #888480;
  --lt-gray: #C8C5C0;
  --page-bg: #ECEAE6;
  --off-white: #F5F4F1;
  --white: #FFFFFF;

  --green: #2D7A4F;
  --green-mid: #3A9962;
  --green-light: #E8F5EE;
  --green-pale: #F0FAF3;

  /* Hairlines */
  --line-on-white: #E0DEDA;
  --line-on-offwhite: #D8D5D1;
  --line-in-card: #EDEBE7;
  --line-on-pagebg: #D4D2CE;
  --line-on-pale: #DCF0E4;
  --line-on-dark: rgba(255,255,255,.1);
  --line-on-dark-soft: rgba(255,255,255,.09);

  --error: #B3261E;

  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-xl: 5px;

  --shadow-card: 0 1px 3px rgba(0,0,0,.06);
  --shadow-elevated: 0 8px 26px rgba(17,17,17,.08);
  --shadow-elevated-lg: 0 12px 34px rgba(17,17,17,.09);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: 'DM Sans', -apple-system, system-ui, sans-serif;
  font-weight: 300;
  background: var(--page-bg);
  color: var(--warm-gray);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font: inherit; }

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

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-family: 'Oswald', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--black);
}

p { text-wrap: pretty; }

.tabular { font-variant-numeric: tabular-nums; }

/* ============ LOGO ============ */
.logo { display: flex; align-items: center; gap: 10px; }
.logo__mark { display: flex; flex-direction: column; gap: 3px; flex-shrink: 0; }
.logo__mark span { display: block; height: 2px; border-radius: 100px; }
.logo__mark span:nth-child(1) { width: 38px; }
.logo__mark span:nth-child(2) { width: 27px; }
.logo__mark span:nth-child(3) { width: 17px; }

.logo__text { display: flex; flex-direction: column; gap: 2px; }
.logo__triple {
  font-family: 'Oswald', sans-serif;
  font-weight: 700;
  font-size: 9px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--mid-gray);
}
.logo__word { display: flex; align-items: baseline; line-height: 1; gap: 4px; }
.logo__thread {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-weight: 700;
  font-size: 21px;
}
.logo__labs { font-weight: 700; font-size: 21px; letter-spacing: -0.3px; }
.logo__dot { font-weight: 700; font-size: 21px; }

/* Light header variant (on white) */
.logo--light .logo__mark span:nth-child(1) { background: #272727; }
.logo--light .logo__mark span:nth-child(2) { background: var(--green); }
.logo--light .logo__mark span:nth-child(3) { background: #272727; }
.logo--light .logo__thread,
.logo--light .logo__labs { color: var(--charcoal); }
.logo--light .logo__dot { color: var(--green); }

/* Dark header variant (on black/charcoal) */
.logo--dark .logo__mark span:nth-child(1) { background: #DDDBD7; }
.logo--dark .logo__mark span:nth-child(2) { background: var(--green-mid); }
.logo--dark .logo__mark span:nth-child(3) { background: #DDDBD7; }
.logo--dark .logo__thread,
.logo--dark .logo__labs { color: #F0EFEC; }
.logo--dark .logo__dot { color: var(--green-mid); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Oswald', sans-serif;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: background 150ms ease, color 150ms ease, border-color 150ms ease, transform 150ms ease;
  min-height: 44px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--green);
  color: var(--white);
  padding: 16px 30px;
}
.btn-primary:hover { background: var(--green-mid); }

.btn-dark {
  background: var(--black);
  color: var(--white);
  padding: 16px 30px;
}
.btn-dark:hover { background: var(--charcoal); }

.btn-outline-dark {
  background: transparent;
  color: #F0EFEC;
  border: 1px solid #4A4844;
  padding: 15px 26px;
}
.btn-outline-dark:hover { background: rgba(255,255,255,.06); }

.btn-outline-light {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--lt-gray);
  padding: 15px 26px;
}
.btn-outline-light:hover { background: var(--off-white); }

.btn-sm {
  font-size: 11px;
  letter-spacing: 1.5px;
  padding: 9px 16px;
  min-height: 0;
}

.btn-full { width: 100%; }

/* ============ HEADER ============ */
.site-header {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}
.site-header--dark {
  background: var(--black);
  border-bottom: 1px solid var(--line-on-dark-soft);
}
.site-header--light {
  height: 66px;
  background: var(--white);
  border-bottom: 1px solid var(--line-on-white);
}

.site-nav { display: flex; align-items: center; gap: 30px; }
/* Compound selector wins over .desktop-only's plain `display: block` regardless
   of source order — .site-nav always needs flex, never the utility's default. */
.site-nav.desktop-only { display: flex; }
.site-nav__item {
  font-family: 'Oswald', sans-serif;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color 150ms ease;
}
.site-header--dark .site-nav__item { color: var(--mid-gray); }
.site-header--dark .site-nav__item:hover,
.site-header--dark .site-nav__item.is-current { color: #F0EFEC; }

.site-header--light .site-nav__item { color: var(--warm-gray); }
.site-header--light .site-nav__item:hover,
.site-header--light .site-nav__item.is-current { color: var(--black); }

/* ============ HEADER CTA ============ */
.header-cta {
  font-family: 'Oswald', sans-serif;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #fff;
  background: var(--green);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  transition: background 150ms ease;
}
.header-cta:hover { background: var(--green-mid); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 20px;
}
.nav-toggle span { display: block; width: 20px; height: 1.5px; background: #F0EFEC; }

/* ============ FOOTER ============ */
.site-footer {
  background: var(--black);
  padding: 34px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-footer__copy {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 1.5px;
  color: var(--warm-gray);
}
.site-footer__links { display: flex; gap: 22px; }
.site-footer__links a {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 1.5px;
  color: var(--mid-gray);
  transition: color 150ms ease;
}
.site-footer__links a:hover { color: #F0EFEC; }

/* ============ BADGES ============ */
.badge {
  display: inline-flex;
  font-family: 'Oswald', sans-serif;
  font-weight: 600;
  font-size: 8.5px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: var(--radius-sm);
}
.badge--fill { background: var(--green); color: var(--white); }
.badge--fill-mid { background: var(--green-mid); color: var(--black); }
.badge--outline { border: 1px solid var(--green); color: var(--green); padding: 2px 6px; }

/* ============ UTILITY ============ */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Oswald', sans-serif;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--green);
}
.eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--green);
}
.eyebrow--dark { color: var(--green-mid); }

.eyebrow--simple {
  font-family: 'Oswald', sans-serif;
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--green);
  display: block;
}

/* ============ SCROLL REVEAL ============ */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity 500ms ease, transform 500ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition-duration: 0.01ms !important; }
}

/* ============ RESPONSIVE HELPERS ============ */
.mobile-only { display: none; }
.desktop-only { display: block; }

@media (max-width: 900px) {
  .mobile-only { display: block; }
  .desktop-only { display: none; }
}