/* global.css — Reset, base styles, layout primitives */

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

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-text-primary);
  line-height: 1.75;
  min-height: 100vh;
  transition: background var(--duration-base) var(--ease-subtle),
              color var(--duration-base) var(--ease-subtle);
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout containers */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Mode bar */
.mode-bar {
  position: relative;
  z-index: 90;
  background: var(--color-surface-secondary);
  border-bottom: 0.5px solid var(--color-border);
  padding: 8px var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  transition: background var(--duration-base) var(--ease-subtle);
}

.mode-bar__label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mode-toggle {
  width: 32px;
  height: 18px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background var(--duration-base) var(--ease-subtle);
  flex-shrink: 0;
}

.mode-toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 12px;
  height: 12px;
  background: var(--color-surface);
  border-radius: 50%;
  transition: transform var(--duration-base) var(--ease-spring),
              background var(--duration-base) var(--ease-subtle);
}

[data-theme="dark"] .mode-toggle {
  background: var(--color-accent);
}

[data-theme="dark"] .mode-toggle::after {
  transform: translateX(14px);
}

/* Site nav */
.site-nav {
  background: var(--color-surface);
  border-bottom: 0.5px solid var(--color-border);
  padding: 14px max(var(--space-xl), calc((100% - 1100px) / 2));
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  transition: background var(--duration-base) var(--ease-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-primary);
  font-weight: 500;
  white-space: nowrap;
  margin-right: var(--space-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-subtle);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-primary);
  font-weight: 500;
}

.nav-divider {
  width: 0.5px;
  height: 16px;
  background: var(--color-border);
  flex-shrink: 0;
}

.nav-foundations {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast) var(--ease-subtle);
}

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

.nav-spacer {
  flex: 1;
}

.nav-token-toggle {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.07em;
  padding: 4px 8px;
  border: 0.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-subtle),
              border-color var(--duration-fast) var(--ease-subtle),
              background var(--duration-fast) var(--ease-subtle);
}

.nav-token-toggle:hover,
.nav-token-toggle.active {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 6%, transparent);
}

/* Hamburger — mobile */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-spring),
              opacity var(--duration-fast) var(--ease-subtle);
}

/* Mobile nav drawer */
.nav-drawer {
  display: none;
  flex-direction: column;
  background: var(--color-surface);
  border-bottom: 0.5px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  gap: var(--space-md);
}

.nav-drawer a {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: var(--space-sm) 0;
  border-bottom: 0.5px solid var(--color-border);
}

.nav-drawer a:last-child { border-bottom: none; }

.nav-drawer.open { display: flex; }

/* Typography utilities */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.07em;
}

.breadcrumb a {
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast) var(--ease-subtle);
}

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

h1.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 0.95;
  letter-spacing: -0.01em;
}

h1.display .accent { color: var(--color-accent); }

h1.case-study-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 36px;
  line-height: 1.0;
  letter-spacing: -0.01em;
}

h2.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.0;
  letter-spacing: -0.01em;
}

.editorial {
  font-family: var(--font-editorial);
  font-style: italic;
}

.mono {
  font-family: var(--font-mono);
}

/* Pill utilities */
.pill {
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.pill-accent {
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
  color: var(--color-accent);
  border: 0.5px solid color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.pill-muted {
  background: color-mix(in srgb, var(--color-text-tertiary) 10%, transparent);
  color: var(--color-text-tertiary);
  border: 0.5px solid color-mix(in srgb, var(--color-text-tertiary) 20%, transparent);
}

/* Section divider trick */
.sections-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--color-border);
}

.section {
  background: var(--color-surface);
  padding: var(--space-2xl) var(--space-xl);
}

/* Page hero */
.page-hero {
  padding: var(--space-2xl) var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

/* Footer */
.site-footer {
  position: relative;
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 0.5px;
  background: var(--color-border);
}

.site-footer__logo {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.site-footer__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.site-footer__links a {
  font-size: 12px;
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast) var(--ease-subtle);
}

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

/* Token toggle overlay styles */
.tokens-on .tok-outline {
  outline: 1.5px dashed var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
  position: relative;
}

.tok-tag {
  display: none;
  position: absolute;
  top: -14px;
  left: 6px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  padding: 2px 5px;
  border-radius: 3px;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
  background: var(--color-text-primary);
  color: var(--color-surface);
}

[data-theme="dark"] .tok-tag {
  background: var(--color-accent);
  color: #0e1318;
}

.tokens-on .tok-tag { display: block; }

/* Responsive */
@media (max-width: 767px) {
  .site-nav {
    padding: 12px var(--space-md);
  }

  .nav-links,
  .nav-divider,
  .nav-foundations,
  .nav-token-toggle,
  .nav-spacer {
    display: none;
  }

  .nav-hamburger {
    display: flex;
    margin-left: auto;
  }

  h1.display {
    font-size: 36px;
  }

  .section {
    padding: var(--space-xl) var(--space-md);
  }

  .page-hero {
    padding: var(--space-xl) var(--space-md);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  h1.display {
    font-size: clamp(36px, 5vw, 52px);
  }
}