:root {
  color-scheme: light;
  --color-background: #fbfaff;
  --color-surface: #ffffff;
  --color-surface-tint: #f3efff;
  --color-text: #17141f;
  --color-muted: #625d6b;
  --color-accent: #6435d4;
  --color-accent-dark: #47219e;
  --color-border: rgba(53, 40, 75, 0.13);
  --color-shadow: rgba(47, 31, 71, 0.12);
  --color-card: rgba(255, 255, 255, 0.78);
  --color-control: rgba(255, 255, 255, 0.72);
  --color-grid: rgba(100, 53, 212, 0.045);
  --color-glow-one: #c4adff;
  --color-glow-two: #e0d5ff;
  --color-on-dark: #ffffff;
  --font-sans:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --container: 70rem;
  --radius-large: 2rem;
  --radius-medium: 1.25rem;
  --shadow-card: 0 1.5rem 4rem var(--color-shadow);
}

[data-theme="dark"] {
  color-scheme: dark;
  --color-background: #100d16;
  --color-surface: #1c1725;
  --color-surface-tint: #181220;
  --color-text: #f6f1ff;
  --color-muted: #bbb2c8;
  --color-accent: #ad8cff;
  --color-accent-dark: #c7afff;
  --color-border: rgba(222, 208, 255, 0.16);
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-card: rgba(31, 24, 42, 0.82);
  --color-control: rgba(31, 24, 42, 0.82);
  --color-grid: rgba(187, 153, 255, 0.06);
  --color-glow-one: #5f3aa7;
  --color-glow-two: #382458;
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  margin: 0;
  overflow-x: hidden;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  transition:
    background-color 180ms ease,
    color 180ms ease;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:focus-visible {
  outline: 0.2rem solid var(--color-accent);
  outline-offset: 0.3rem;
  border-radius: 0.2rem;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.06;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

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

.container {
  width: min(var(--container), calc(100% - 2.5rem));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.7rem 1rem;
  transform: translateY(-200%);
  border-radius: 0.5rem;
  background: var(--color-text);
  color: var(--color-surface);
  font-weight: 700;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: absolute;
  z-index: 10;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 5.25rem;
  gap: 0.85rem 1.5rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: 9.5rem;
}

.brand-logo--dark {
  display: none;
}

[data-theme="dark"] .brand-logo--light {
  display: none;
}

[data-theme="dark"] .brand-logo--dark {
  display: block;
}

nav {
  grid-column: 1 / -1;
  grid-row: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(0.8rem, 3vw, 2rem);
}

nav a {
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 160ms ease;
}

nav a:hover {
  color: var(--color-accent);
}

.theme-picker {
  position: relative;
  grid-column: 2;
  grid-row: 1;
}

.theme-picker::after {
  position: absolute;
  top: 50%;
  right: 0.75rem;
  transform: translateY(-53%);
  color: var(--color-accent);
  content: "◐";
  font-size: 0.85rem;
  pointer-events: none;
}

.theme-picker select {
  min-width: 7.25rem;
  padding: 0.55rem 2rem 0.55rem 0.8rem;
  appearance: none;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-control);
  color: var(--color-text);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color 180ms ease,
    border-color 180ms ease;
}

.theme-picker select:hover {
  border-color: var(--color-accent);
}

.theme-picker select:focus-visible {
  outline: 0.2rem solid var(--color-accent);
  outline-offset: 0.2rem;
}

.hero {
  position: relative;
  display: grid;
  min-height: min(52rem, 100svh);
  place-items: center;
  overflow: hidden;
  padding-block: 9rem 6rem;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 4rem 4rem;
  content: "";
  mask-image: linear-gradient(to bottom, black 20%, transparent 92%);
}

.hero__glow {
  position: absolute;
  z-index: -1;
  width: 26rem;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(1rem);
  opacity: 0.75;
}

.hero__glow--one {
  top: -11rem;
  right: -10rem;
  background: radial-gradient(
    circle,
    var(--color-glow-one) 0%,
    transparent 68%
  );
}

.hero__glow--two {
  bottom: -15rem;
  left: -11rem;
  background: radial-gradient(
    circle,
    var(--color-glow-two) 0%,
    transparent 68%
  );
}

.hero__content {
  text-align: center;
}

.eyebrow {
  margin-bottom: 1.2rem;
  color: var(--color-accent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 13ch;
  margin: 0 auto 1.75rem;
  font-size: clamp(3.15rem, 10vw, 7.4rem);
  font-weight: 750;
  letter-spacing: -0.065em;
}

.hero__lead {
  max-width: 44rem;
  margin: 0 auto 2.3rem;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2.2vw, 1.32rem);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.text-link span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-control);
  transition:
    transform 160ms ease,
    border-color 160ms ease;
}

.text-link:hover span {
  transform: translateY(0.2rem);
  border-color: var(--color-accent);
}

.section {
  padding-block: clamp(5rem, 10vw, 8.5rem);
  scroll-margin-top: 2rem;
}

.section--tint {
  position: relative;
  border-block: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 80% 0%, rgba(183, 154, 255, 0.22), transparent 35%),
    var(--color-surface-tint);
}

.section-heading {
  max-width: 50rem;
  margin-bottom: 3rem;
}

.section-heading h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2.5rem, 7vw, 5.2rem);
}

.section-heading > p:last-child {
  max-width: 42rem;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.section-heading--compact {
  max-width: 42rem;
}

.principles {
  display: grid;
  gap: 1rem;
}

.principle-card {
  position: relative;
  min-height: 18rem;
  padding: 2rem;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-card);
  box-shadow: 0 1rem 3rem var(--color-shadow);
  backdrop-filter: blur(1rem);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.principle-card:hover {
  transform: translateY(-0.35rem);
  box-shadow: var(--shadow-card);
}

.principle-card::after {
  position: absolute;
  right: -3rem;
  bottom: -4rem;
  width: 9rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(100, 53, 212, 0.14), transparent 68%);
  content: "";
}

.principle-card__number {
  display: block;
  margin-bottom: 5rem;
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.principle-card h3 {
  margin-bottom: 0.8rem;
  font-size: 1.35rem;
}

.principle-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
  margin: 3.5rem 0 0;
  padding: 0;
  list-style: none;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2.85rem;
  width: 1px;
  background: linear-gradient(var(--color-accent), var(--color-border));
  content: "";
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 5.8rem 1fr;
  gap: 1.4rem;
  padding-block: 0 3.5rem;
}

.timeline li::before {
  position: absolute;
  top: 0.42rem;
  left: 2.57rem;
  width: 0.58rem;
  aspect-ratio: 1;
  border: 0.2rem solid var(--color-background);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(100, 53, 212, 0.35);
  content: "";
}

.timeline time {
  color: var(--color-accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.timeline h3 {
  margin-bottom: 0.55rem;
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.timeline p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.section--contact {
  padding-top: 2rem;
}

.contact-card {
  position: relative;
  display: grid;
  gap: 3rem;
  padding: clamp(2.2rem, 7vw, 5rem);
  overflow: hidden;
  border-radius: var(--radius-large);
  background:
    radial-gradient(circle at 88% 0%, rgba(194, 166, 255, 0.4), transparent 36%),
    linear-gradient(135deg, #1b1527, #30204b);
  color: var(--color-on-dark);
  box-shadow: var(--shadow-card);
}

.contact-card::after {
  position: absolute;
  right: -5rem;
  bottom: -8rem;
  width: 18rem;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
}

.contact-card .eyebrow {
  color: #cdbbff;
}

.contact-card h2 {
  max-width: 11ch;
  margin-bottom: 1rem;
  font-size: clamp(2.6rem, 7vw, 5rem);
}

.contact-card p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.7);
}

.contact-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  align-self: end;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.42);
  font-size: clamp(1rem, 3.5vw, 1.45rem);
  font-weight: 650;
  text-decoration: none;
  transition: border-color 160ms ease;
}

.contact-link:hover {
  border-color: #cdbbff;
}

.contact-link span {
  color: #cdbbff;
}

.site-footer {
  padding-block: 2.25rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  font-weight: 700;
  text-decoration: none;
}

.not-found-page {
  display: grid;
  min-height: 100svh;
  place-items: center;
  background:
    radial-gradient(circle at 85% 12%, rgba(195, 171, 255, 0.4), transparent 32%),
    radial-gradient(circle at 10% 90%, rgba(222, 211, 255, 0.7), transparent 35%),
    var(--color-background);
}

.not-found {
  width: min(42rem, calc(100% - 2.5rem));
  padding-block: 3rem;
  text-align: center;
}

.not-found .brand {
  margin-bottom: 4rem;
}

.not-found .brand img {
  width: 11rem;
  margin-inline: auto;
}

.not-found h1 {
  margin-bottom: 1.2rem;
  font-size: clamp(3rem, 10vw, 6rem);
}

.not-found > p:not(.eyebrow) {
  max-width: 34rem;
  margin: 0 auto 2rem;
  color: var(--color-muted);
}

@media (min-width: 48rem) {
  .container {
    width: min(var(--container), calc(100% - 5rem));
  }

  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    gap: 2rem;
    padding-block: 0;
  }

  .brand img {
    width: 11.5rem;
  }

  nav {
    grid-column: 2;
    grid-row: 1;
    justify-content: flex-end;
  }

  .theme-picker {
    grid-column: 3;
  }

  nav a {
    font-size: 0.82rem;
  }

  .hero {
    padding-top: 10rem;
  }

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

  .principle-card {
    min-height: 22rem;
    padding: 2.3rem;
  }

  .timeline {
    max-width: 58rem;
  }

  .timeline::before {
    left: 7.9rem;
  }

  .timeline li {
    grid-template-columns: 8rem 1fr;
    gap: 3.5rem;
    padding-bottom: 4.5rem;
  }

  .timeline li::before {
    left: 7.62rem;
  }

  .contact-card {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: end;
  }
}

@media (max-width: 34rem) {
  .site-header__inner {
    padding-block: 1.15rem;
  }

  nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding-top: 12rem;
  }

  .contact-link {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}