/* Tokens mirror main/tools/theme/theme.js so the page shares the platform's identity. */
:root,
:root[data-theme="light"] {
  --theme-bg-primary: #ffffff;
  --theme-bg-secondary: #f7f7f5;
  --theme-bg-tertiary: #eeeeea;
  --theme-text-primary: #18181b;
  --theme-text-secondary: #52525b;
  --theme-text-tertiary: #a1a1aa;
  --theme-text-inverse: #ffffff;
  --theme-border-subtle: #e4e4e7;
  --theme-border-default: #d4d4d8;
  --theme-color-primary: #2d5cf6;
  --theme-surface-raised: #ffffff;
  --theme-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --theme-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --about-cta-bg: #2d5cf6;
  --about-cta-text: #ffffff;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --theme-bg-primary: #0f0f10;
  --theme-bg-secondary: #18181b;
  --theme-bg-tertiary: #27272a;
  --theme-text-primary: #fafafa;
  --theme-text-secondary: #a1a1aa;
  --theme-text-tertiary: #71717a;
  --theme-text-inverse: #18181b;
  --theme-border-subtle: #27272a;
  --theme-border-default: #3f3f46;
  --theme-color-primary: #6b8cff;
  --theme-surface-raised: #1c1c1f;
  --theme-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --theme-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --about-cta-bg: #1e3fb8;
  --about-cta-text: #ffffff;
  color-scheme: dark;
}

:root {
  --theme-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --theme-radius-sm: 6px;
  --theme-radius-md: 10px;
  --theme-radius-lg: 14px;
  --theme-radius-full: 9999px;
  --about-primary-soft: color-mix(in srgb, var(--theme-color-primary) 12%, transparent);
  --about-header-height: 64px;
  --about-gutter: 16px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--about-header-height);
}

.about {
  margin: 0;
  background: var(--theme-bg-primary);
  color: var(--theme-text-primary);
  font-family: var(--theme-font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

:where(.about) a {
  color: inherit;
}

:where(.about) :where(h1, h2, h3) {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

:where(.about) p {
  margin: 0;
}

:where(.about) :where(ul, ol) {
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--about-gutter);
}

/* Logos swap with the theme without JS. */
:root[data-theme="dark"] .about-logo-light,
:root:not([data-theme="dark"]) .about-logo-dark {
  display: none;
}

/* Header */

.about-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-top: env(safe-area-inset-top, 0px);
  background: color-mix(in srgb, var(--theme-bg-tertiary) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  box-shadow: var(--theme-shadow-sm);
}

.about-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--about-header-height);
}

.about-header-brand {
  display: inline-flex;
  align-items: center;
  flex: none;
}

.about-header-logo {
  width: auto;
  height: 48px;
}

.about-header-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.about-icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: var(--theme-radius-md);
  background: transparent;
  color: var(--theme-text-primary);
  cursor: pointer;
  transition: background 120ms ease;
}

.about-icon-button:hover {
  background: var(--theme-bg-secondary);
}

.about-language {
  position: relative;
}

.about-language[hidden] {
  display: none;
}

/* The native select sits invisibly over the globe, so a click opens the
   platform's own language list (the picker on phones). */
.about-language-select {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  font-size: 16px;
  cursor: pointer;
}

:root[data-theme="dark"] .about-theme-moon,
:root:not([data-theme="dark"]) .about-theme-sun {
  display: none;
}

.about-language:has(.about-language-select:focus-visible),
.about-icon-button:focus-visible,
.about-button:focus-visible,
.about-tile-link:focus-visible {
  outline: 2px solid var(--theme-color-primary);
  outline-offset: 2px;
}

/* Buttons */

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--theme-radius-md);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.about-button:hover {
  transform: translateY(-1px);
}

/* Shared section pieces */

.about-section {
  padding: 88px 0;
}

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

.about-hero + .about-section {
  padding-top: 56px;
}

.about-eyebrow {
  margin-bottom: 12px;
  color: var(--theme-color-primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-title {
  max-width: 24ch;
  margin-bottom: 20px;
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  font-weight: 700;
}

.about-title + :is(.about-grid, .about-why-list) {
  margin-top: 20px;
}

.about-lead {
  max-width: 64ch;
  margin-bottom: 40px;
  color: var(--theme-text-secondary);
  font-size: 18px;
}

.about-prose {
  display: grid;
  gap: 16px;
  max-width: 64ch;
  color: var(--theme-text-secondary);
  font-size: 17px;
}

.about-grid {
  display: grid;
  gap: 20px;
}

.about-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.about-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.about-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
  padding: 28px;
  border: 1px solid var(--theme-border-subtle);
  border-radius: var(--theme-radius-lg);
  background: var(--theme-surface-raised);
  box-shadow: var(--theme-shadow-sm);
}

.about-card h3 {
  font-size: 19px;
  font-weight: 700;
}

.about-card p {
  color: var(--theme-text-secondary);
  font-size: 15px;
}

.about-tile-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--theme-radius-md);
  background: var(--about-primary-soft);
  color: var(--theme-color-primary);
}

/* Hero */

.about-hero {
  position: relative;
  padding: 96px 0 40px;
  background:
    radial-gradient(900px 480px at 85% -10%, var(--about-primary-soft), transparent 70%),
    radial-gradient(700px 420px at -10% 110%, var(--about-primary-soft), transparent 70%),
    var(--theme-bg-primary);
  overflow: hidden;
}

.about-hero-title {
  max-width: 20ch;
  margin-bottom: 24px;
  font-size: clamp(2.25rem, 5.4vw, 3.75rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.about-highlight {
  color: var(--theme-color-primary);
}

.about-hero-lead {
  max-width: 60ch;
  color: var(--theme-text-secondary);
  font-size: clamp(17px, 1.6vw, 20px);
}

/* Why */

.about-why-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.about-why-item {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 24px;
  border-radius: var(--theme-radius-lg);
  background: var(--theme-surface-raised);
  border: 1px solid var(--theme-border-subtle);
  font-size: 17px;
}

.about-why-index {
  flex: none;
  color: var(--theme-color-primary);
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.about-why-closing {
  max-width: 60ch;
  margin-top: 40px;
  padding-left: 20px;
  border-left: 3px solid var(--theme-color-primary);
  font-size: 19px;
  font-weight: 600;
}

/* Approach */

.about-approach {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.about-quote {
  margin: 0;
  padding: 40px;
  border-radius: var(--theme-radius-lg);
  background: var(--theme-bg-secondary);
  border: 1px solid var(--theme-border-subtle);
}

.about-quote blockquote {
  position: relative;
  margin: 0;
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.about-quote blockquote::before {
  content: '\201C';
  display: block;
  height: 0.6em;
  color: var(--theme-color-primary);
  font-size: 4em;
  line-height: 1;
}

/* Pillars */

.about-pillar-index {
  color: var(--theme-color-primary);
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

/* Ecosystem */

.about-tile {
  gap: 10px;
}

.about-tile h3 {
  margin-top: 8px;
}

.about-tile p {
  flex: 1;
}

.about-tile-link {
  text-decoration: none;
  transition: transform 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.about-tile-link:hover {
  transform: translateY(-3px);
  border-color: var(--theme-color-primary);
  box-shadow: var(--theme-shadow-md);
}

.about-tile-open {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--theme-color-primary);
  font-size: 14px;
  font-weight: 600;
}

/* Principles */

.about-principle {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.about-principle h3 {
  margin-top: 8px;
  font-size: 19px;
  font-weight: 700;
}

.about-principle p {
  color: var(--theme-text-secondary);
  font-size: 15px;
}

/* Audience */

.about-audience-inner {
  max-width: 860px;
  text-align: center;
}

.about-audience-inner .about-title {
  max-width: none;
}

.about-audience-text {
  color: var(--theme-text-secondary);
  font-size: clamp(18px, 2vw, 22px);
}

/* Call to action */

.about-cta {
  padding: 88px 0;
  background:
    radial-gradient(700px 360px at 90% 0%, rgba(255, 255, 255, 0.18), transparent 70%),
    var(--about-cta-bg);
  color: var(--about-cta-text);
}

.about-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.about-cta h2 {
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  font-weight: 800;
}

.about-cta p {
  max-width: 52ch;
  margin-bottom: 12px;
  font-size: 18px;
  opacity: 0.9;
}

.about-cta .about-actions {
  justify-content: center;
}

.about-button-ghost {
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
  color: #ffffff;
}

.about-button-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.about-share-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 8px;
}

.about-share-list[hidden] {
  display: none;
}

.about-share-link {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  color: #ffffff;
  transition: background 120ms ease, transform 150ms ease;
}

.about-share-link:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.about-cta .about-button:focus-visible,
.about-share-link:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* Footer: a single quiet line below the call to action, the way to the contact form. */

.about-footer {
  padding: 28px 0 calc(28px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--theme-border-subtle);
  background: var(--theme-bg-secondary);
}

.about-footer-inner {
  display: flex;
  justify-content: center;
}

.about-footer-contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--theme-radius-md);
  color: var(--theme-text-secondary);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: color 120ms ease;
}

.about-footer-contact:hover {
  color: var(--theme-color-primary);
}

.about-footer-contact:focus-visible {
  outline: 2px solid var(--theme-color-primary);
  outline-offset: 2px;
}

.about-noscript {
  padding: 64px var(--about-gutter);
}

/* Reveal on scroll */

.about-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.about-reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .about-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .about-button:hover,
  .about-tile-link:hover {
    transform: none;
  }
}

/* Responsive */

@media (min-width: 768px) {
  :root {
    --about-gutter: 32px;
  }
}

@media (max-width: 1024px) {
  .about-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-approach {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .about-section,
  .about-cta {
    padding: 64px 0;
  }

  .about-hero {
    padding: 64px 0 32px;
  }

  .about-hero + .about-section {
    padding-top: 40px;
  }

  .about-grid-3,
  .about-why-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-quote {
    padding: 28px;
  }
}

@media (max-width: 560px) {
  :root {
    --about-header-height: 56px;
  }

  .about-header-logo {
    height: 40px;
  }

  .about-grid-4 {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-card {
    padding: 22px;
  }

  .about-tile,
  .about-principle {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 6px 16px;
    align-items: start;
  }

  .about-tile .about-tile-icon {
    grid-column: 1;
    grid-row: 1 / span 3;
  }

  .about-principle .about-tile-icon {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .about-tile h3,
  .about-principle h3 {
    margin-top: 10px;
  }

  .about-tile-open {
    margin-top: 6px;
  }

  .about-actions .about-button {
    flex: 1 1 100%;
  }
}