:root {
  --color-deep-teal: #28595E;
  --color-deep-teal-hover: #1E4448;
  --color-signal-orange: #DB7950;
  --color-soft-sage: #869886;
  --color-warm-gray: #6F6B62;
  --color-ink: #1B2E30;
  --color-paper: #FAF9F7;
  --color-white: #FFFFFF;

  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 112px;

  --radius-sm: 6px;
  --radius-md: 12px;

  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --duration-standard: 200ms;
  --duration-reveal: 700ms;

  --z-nav: 100;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 168px;
  }
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.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;
}

/* ---------- Navigation ---------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-white);
  box-shadow: 0 1px 0 rgba(27, 46, 48, 0.08);
  padding: var(--space-sm) var(--space-md);
}

.nav-brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  color: var(--color-ink);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.nav-brand-product {
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: normal;
  color: var(--color-warm-gray);
}

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

.nav-link {
  color: var(--color-ink);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color var(--duration-standard) var(--ease-out-quart);
}

.nav-link.is-active,
.nav-link:hover,
.nav-link:focus-visible {
  border-bottom-color: var(--color-signal-orange);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 4px;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-deep-teal);
  color: var(--color-white);
  padding: var(--space-xl) var(--space-md);
  overflow: hidden;
}

.hero-signal {
  width: min(200px, 42vw);
  margin-bottom: var(--space-xs);
}

.hero-logo {
  display: block;
  width: 100%;
  height: auto;
  animation: logo-pulse 3.2s var(--ease-out-quart) infinite;
}

@keyframes logo-pulse {
  0%, 100% {
    filter: drop-shadow(0 0 0 rgba(219, 121, 80, 0));
  }
  50% {
    filter: drop-shadow(0 0 28px rgba(219, 121, 80, 0.6));
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-logo {
    animation: none;
    filter: drop-shadow(0 0 16px rgba(219, 121, 80, 0.25));
  }
}

.hero-content {
  max-width: 46rem;
}

.hero h1 {
  max-width: 44rem;
  margin-left: auto;
  margin-right: auto;
  font-size: clamp(2.25rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  text-wrap: balance;
}

.hero-sub {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.88);
  max-width: 38rem;
  margin: 0 auto;
  line-height: 1.65;
  text-wrap: pretty;
}

/* ---------- Backed by ---------- */

.backed {
  padding: var(--space-xl) var(--space-md);
  background: var(--color-paper);
  border-top: 1px solid rgba(27, 46, 48, 0.08);
  text-align: center;
}

.backed-label {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 var(--space-lg);
  text-wrap: balance;
}

.backed-logos {
  display: flex;
  justify-content: center;
  align-items: center;
}

.backed-logos a {
  display: inline-flex;
  border-radius: var(--radius-sm);
  transition: opacity var(--duration-standard) var(--ease-out-quart);
}

.backed-logos a:hover {
  opacity: 0.75;
}

.backed-logos a:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 4px;
}

.backed-logo {
  height: 72px;
  width: auto;
  display: block;
}

/* ---------- Crisis ---------- */

.crisis {
  padding: var(--space-xl) var(--space-md);
  background: var(--color-paper);
  border-top: 1px solid rgba(27, 46, 48, 0.08);
}

.crisis-inner {
  max-width: 42rem;
  margin: 0 auto;
}

.crisis-heading {
  display: flex;
  flex-direction: column;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 var(--space-lg);
  text-align: center;
  text-wrap: balance;
}

.crisis-heading-sub {
  margin-top: var(--space-xs);
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  font-weight: 500;
  letter-spacing: normal;
  color: var(--color-warm-gray);
}

.crisis-figure {
  margin: 0 0 var(--space-lg);
}

.crisis-chart {
  display: block;
  width: 100%;
  max-width: 28rem;
  height: auto;
  margin: 0 auto;
}

.crisis-figure-caption {
  margin: var(--space-xs) 0 0;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-warm-gray);
  text-align: center;
}

.crisis-mission {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-ink);
  margin: 0 0 var(--space-lg);
  text-wrap: pretty;
}

.crisis-stats p {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0 0 var(--space-md);
  max-width: 65ch;
}

.crisis-stats > p:last-child {
  margin-bottom: 0;
}

.crisis-cite {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  margin: 0 !important;
}

.crisis-source {
  color: var(--color-warm-gray);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-standard) var(--ease-out-quart);
}

.crisis-source:hover {
  color: var(--color-ink);
}

.crisis-source:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 2px;
  color: var(--color-ink);
}

.crisis-more {
  display: inline;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-warm-gray);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
  transition: color var(--duration-standard) var(--ease-out-quart);
}

.crisis-more:hover {
  color: var(--color-ink);
}

.crisis-more:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 2px;
  color: var(--color-ink);
}

.crisis-dialog {
  max-width: 32rem;
  width: calc(100% - var(--space-md) * 2);
  margin: auto;
  padding: var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-ink);
  box-shadow: 0 2px 12px rgba(27, 46, 48, 0.08);
}

.crisis-dialog::backdrop {
  background: rgba(27, 46, 48, 0.4);
}

.crisis-dialog p {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin: 0 0 var(--space-sm);
  max-width: 65ch;
}

.crisis-dialog p:last-child {
  margin-bottom: 0;
}

.crisis-dialog-close {
  float: right;
  background: none;
  border: none;
  padding: var(--space-xs);
  margin: calc(var(--space-xs) * -1) calc(var(--space-xs) * -1) 0 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-warm-gray);
  cursor: pointer;
  transition: color var(--duration-standard) var(--ease-out-quart);
}

.crisis-dialog-close:hover {
  color: var(--color-ink);
}

.crisis-dialog-close:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 2px;
  color: var(--color-ink);
}

@media (prefers-reduced-motion: no-preference) {
  .crisis-dialog {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
    transition: opacity 200ms var(--ease-out-quart),
                transform 200ms var(--ease-out-quart);
  }

  .crisis-dialog.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ---------- Technology ---------- */

.tech {
  padding: var(--space-xl) var(--space-md);
  background: var(--color-soft-sage);
}

.tech-heading {
  max-width: 64rem;
  margin: 0 auto var(--space-lg);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  text-align: center;
  text-wrap: balance;
}

.tech-grid {
  max-width: 64rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (max-width: 640px) {
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

.tech-card {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-white);
  border: 1px solid rgba(27, 46, 48, 0.08);
  box-shadow: 0 2px 12px rgba(27, 46, 48, 0.08);
}

.tech-card--tint {
  background: var(--color-paper);
  border-color: rgba(27, 46, 48, 0.06);
}

.tech-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-sm);
  color: var(--color-deep-teal);
}

.tech-icon svg {
  width: 100%;
  height: 100%;
}

.tech-icon-group {
  width: auto;
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
}

.tech-icon-group svg,
.tech-icon-group img {
  width: auto;
  height: 44px;
  display: block;
}

.tech-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 var(--space-xs);
  letter-spacing: -0.005em;
}

.tech-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-warm-gray);
  margin: 0;
  max-width: 40ch;
}

/* ---------- Contact ---------- */

.contact {
  padding: var(--space-xl) var(--space-md);
  background: var(--color-soft-sage);
  text-align: center;
}

.contact-inner {
  max-width: 34rem;
  margin: 0 auto;
}

.contact h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 var(--space-sm);
  text-wrap: balance;
}

.contact p {
  color: var(--color-ink);
  font-size: 1.0625rem;
  line-height: 1.6;
  margin: 0 0 var(--space-md);
}

.contact-email {
  display: inline-block;
  background: var(--color-deep-teal);
  color: var(--color-white);
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  transition: background var(--duration-standard) var(--ease-out-quart),
              box-shadow var(--duration-standard) var(--ease-out-quart),
              transform 100ms var(--ease-out-quart);
}

.contact-email:hover {
  background: var(--color-deep-teal-hover);
  box-shadow: 0 0 32px rgba(219, 121, 80, 0.25);
}

.contact-email:focus-visible {
  outline: 2px solid var(--color-signal-orange);
  outline-offset: 3px;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: var(--space-md);
  text-align: center;
  color: var(--color-warm-gray);
  font-size: 0.875rem;
  background: var(--color-paper);
}

/* ---------- Scroll reveal ---------- */

.reveal {
  opacity: 1;
  transform: none;
}

.reveal.is-ready {
  opacity: 0;
  transform: translateY(16px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-reveal) var(--ease-out-quart),
              transform var(--duration-reveal) var(--ease-out-quart);
  transition-delay: var(--reveal-delay, 0ms);
}

@media (prefers-reduced-motion: reduce) {
  .reveal.is-ready {
    opacity: 1;
    transform: none;
  }
  .reveal.is-visible {
    transition: none;
  }
}

/* Hero content is above the fold on load: it plays its own immediate
   entrance instead of waiting on the scroll-triggered IntersectionObserver,
   so the page's most important line is never hidden behind a JS boot delay. */
.hero .reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: hero-reveal var(--duration-reveal) var(--ease-out-quart) forwards;
  animation-delay: var(--reveal-delay, 0ms);
}

@keyframes hero-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero .reveal {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* Each section's reveal earns its own moment (the mirron-bio.com reference
   DESIGN.md cites) instead of repeating one uniform fade-up everywhere.
   Scoped entirely inside prefers-reduced-motion: no-preference so the base
   .reveal.is-ready / .reveal rules above remain the only ones in effect —
   and therefore fully honored — for anyone who prefers reduced motion. */
@media (prefers-reduced-motion: no-preference) {
  /* Crisis: a still, quiet moment — crossfade only, slightly slower, no
     rise. This is a reading beat, not an arrival. */
  .crisis-heading.reveal.is-ready,
  .crisis-stats .reveal.is-ready,
  .crisis-mission.reveal.is-ready {
    transform: none;
  }
  .crisis-heading.reveal.is-visible,
  .crisis-stats .reveal.is-visible,
  .crisis-mission.reveal.is-visible {
    transition-duration: 900ms;
  }

  /* Crisis chart: a discrete data object arriving, like the tech cards. */
  .crisis-chart.reveal.is-ready {
    transform: translateY(16px) scale(0.97);
  }
  .crisis-chart.reveal.is-visible {
    transform: translateY(0) scale(1);
  }

  /* Technology cards: settle into place — a touch of scale alongside the
     rise, so the grid feels like it's assembling rather than just fading. */
  .tech-card.reveal.is-ready {
    transform: translateY(16px) scale(0.97);
  }
  .tech-card.reveal.is-visible {
    transform: translateY(0) scale(1);
  }

  /* Backed by: the quietest moment on the page — a trust mark needs
     presence, not motion. Pure, slow crossfade. */
  .backed .reveal.is-ready {
    transform: none;
  }
  .backed .reveal.is-visible {
    transition-duration: 1100ms;
  }

  /* Contact: the closing, peak-end moment gets slightly more arrival
     presence than the mid-page sections. */
  .contact .reveal.is-ready {
    transform: translateY(24px);
  }
  .contact .reveal.is-visible {
    transition-duration: 800ms;
  }

  /* Primary CTA: quick press feedback on click, matching the 100-150ms
     "instant feedback" band rather than the section-reveal timings above. */
  .contact-email:active {
    transform: scale(0.97);
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-sm);
  }

  .nav-brand {
    white-space: nowrap;
  }

  .nav-links {
    width: 100%;
    gap: var(--space-sm);
  }

  .hero {
    padding: calc(var(--space-lg) + var(--space-sm)) var(--space-sm) var(--space-lg);
  }

  .crisis,
  .tech,
  .contact {
    padding: var(--space-lg) var(--space-sm);
  }

  .nav-links {
    gap: var(--space-sm);
  }
}