:root {
  color-scheme: dark;
  --bg: #06111f;
  --bg-deep: #020916;
  --bg-panel: rgba(7, 22, 39, 0.82);
  --bg-panel-strong: rgba(8, 28, 49, 0.94);
  --surface: rgba(12, 31, 54, 0.72);
  --surface-solid: #0a1b31;
  --surface-soft: rgba(13, 39, 68, 0.58);
  --text: #dceef8;
  --text-soft: #a9c3da;
  --text-muted: #6f8ba6;
  --line: rgba(114, 218, 255, 0.2);
  --line-strong: rgba(114, 218, 255, 0.34);
  --accent: #21d7ff;
  --accent-2: #1aa8ff;
  --accent-soft: rgba(33, 215, 255, 0.12);
  --accent-glow: rgba(33, 215, 255, 0.35);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
  --radius: 8px;
  --max-width: 1360px;
  --transition: 180ms ease;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #edf6fb;
  --bg-deep: #dceaf4;
  --bg-panel: rgba(255, 255, 255, 0.82);
  --bg-panel-strong: rgba(255, 255, 255, 0.96);
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --surface-soft: rgba(231, 245, 252, 0.84);
  --text: #06111f;
  --text-soft: #40596f;
  --text-muted: #6d8296;
  --line: rgba(15, 92, 128, 0.16);
  --line-strong: rgba(15, 92, 128, 0.28);
  --accent: #00a8d7;
  --accent-2: #0877e8;
  --accent-soft: rgba(0, 168, 215, 0.12);
  --accent-glow: rgba(0, 168, 215, 0.22);
  --shadow: 0 24px 60px rgba(20, 58, 84, 0.16);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", "Public Sans", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 74% 0%, rgba(33, 215, 255, 0.17), transparent 28rem),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 36%, var(--bg-deep) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(88, 208, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88, 208, 255, 0.08) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.64), transparent 84%);
}

html[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(6, 70, 102, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 70, 102, 0.07) 1px, transparent 1px);
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

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

p,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding-left: 1.05rem;
}

.site-shell {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 1rem 0 2.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
  padding: 0.9rem 0;
  border: 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  border-radius: 0;
  background: color-mix(in srgb, var(--bg-panel-strong) 58%, transparent);
  box-shadow: none;
  backdrop-filter: blur(18px);
  transition: border-color var(--transition), background-color var(--transition);
}

.site-header.is-scrolled {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--bg-panel-strong) 86%, transparent);
}

html[data-theme="light"] .site-header {
  background: color-mix(in srgb, #071629 94%, transparent);
  border-bottom-color: rgba(0, 168, 215, 0.32);
  color: #dceef8;
}

html[data-theme="light"] .site-header.is-scrolled,
html[data-theme="light"] .header-actions.is-open {
  background: #071629;
}

html[data-theme="light"] .site-header .brand-lockup strong,
html[data-theme="light"] .site-header .site-nav a.is-current,
html[data-theme="light"] .site-header .external-nav a:hover,
html[data-theme="light"] .site-header .external-nav a:focus-visible {
  color: #f4fbff;
}

html[data-theme="light"] .site-header .site-nav a,
html[data-theme="light"] .site-header .external-nav a,
html[data-theme="light"] .site-header .brand-lockup span,
html[data-theme="light"] .site-header .theme-toggle button,
html[data-theme="light"] .site-header .lang-switch a {
  color: #a9c3da;
}

html[data-theme="light"] .site-header .theme-toggle button.is-active,
html[data-theme="light"] .site-header .lang-switch a.is-current {
  color: #02101a;
}

html[data-theme="light"] .nav-toggle {
  background: #071629;
  color: #dceef8;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.brand-logo {
  display: grid;
  place-items: center;
  min-width: 8.6rem;
  min-height: 2.2rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.brand-logo img {
  width: 7.8rem;
  height: auto;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  min-width: 0;
}

.brand-lockup strong {
  font-family: "Space Grotesk", "Sora", sans-serif;
  font-size: 0.92rem;
  line-height: 1;
}

.brand-lockup span {
  color: var(--text-muted);
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.site-nav,
.external-nav,
.footer-nav {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.site-nav a,
.external-nav a,
.footer-nav a {
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 700;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

.site-nav a {
  position: relative;
  padding: 0.36rem 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.1rem;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-current::after {
  transform: scaleX(1);
}

.site-nav a.is-current,
.external-nav a:hover,
.external-nav a:focus-visible,
.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--text);
}

.external-nav {
  gap: 0.72rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--line);
}

.external-nav a {
  padding: 0.34rem 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.theme-toggle,
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.16rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.theme-toggle button,
.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.35rem 0.62rem;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.theme-toggle button.is-active,
.lang-switch a.is-current {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #02101a;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.24rem;
  width: 2.65rem;
  height: 2.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.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;
}

.page-main {
  padding: 1.15rem 0 4rem;
}

.page-main > * + * {
  margin-top: clamp(2.4rem, 6vw, 4.8rem);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: min(760px, calc(100vh - 7.4rem));
  display: grid;
  align-items: stretch;
  border: 0;
  border-radius: 0;
  background:
    linear-gradient(90deg, rgba(2, 9, 22, 0.96) 0%, rgba(5, 17, 31, 0.88) 42%, rgba(5, 17, 31, 0.34) 100%),
    var(--hero-image, none) center right / cover no-repeat,
    linear-gradient(135deg, #020916, #071d34);
  box-shadow: none;
}

html[data-theme="light"] .hero {
  background:
    linear-gradient(90deg, rgba(2, 9, 22, 0.96) 0%, rgba(5, 17, 31, 0.88) 42%, rgba(5, 17, 31, 0.34) 100%),
    var(--hero-image, none) center right / cover no-repeat,
    linear-gradient(135deg, #020916, #071d34);
  color: #dceef8;
}

html[data-theme="light"] .hero h1 {
  color: color-mix(in srgb, #a9c3da 62%, #21d7ff 38%);
}

html[data-theme="light"] .hero .lead,
html[data-theme="light"] .hero .signal-panel li {
  color: #a9c3da;
}

.hero::before,
.tech-section::before,
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(94, 218, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 218, 255, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 88%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 10rem;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg));
}

html[data-theme="light"] .hero::after {
  background: linear-gradient(180deg, transparent, rgba(2, 9, 22, 0.94));
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(340px, 1fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.35rem, 4vw, 3rem);
}

.hero-copy {
  display: grid;
  gap: 1.15rem;
  max-width: 42rem;
}

.hero-kicker,
.section-kicker,
.card-kicker,
.meta {
  color: var(--accent);
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Space Grotesk", "Sora", sans-serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(4rem, 10vw, 8.4rem);
  line-height: 0.9;
  color: color-mix(in srgb, var(--text-soft) 70%, var(--accent) 30%);
}

h2 {
  font-size: clamp(2rem, 4.5vw, 4.25rem);
  line-height: 0.98;
}

h3 {
  font-size: clamp(1.12rem, 2vw, 1.45rem);
  line-height: 1.15;
}

.lead,
.intro,
.card p,
.project-row p,
.article-card p,
.resource-panel p,
.contact-card p,
.site-footer p,
.redirect-main p {
  color: var(--text-soft);
  line-height: 1.72;
}

.lead {
  max-width: 38rem;
  font-size: clamp(1.04rem, 2vw, 1.28rem);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding-top: 0.35rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.05rem;
  padding: 0.85rem 1.08rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  transition: transform var(--transition), border-color var(--transition), background-color var(--transition);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #02101a;
  box-shadow: 0 18px 42px var(--accent-glow);
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

html[data-theme="light"] .button-secondary {
  background: rgba(255, 255, 255, 0.86);
}

.signal-panel {
  align-self: end;
  justify-self: end;
  width: min(100%, 26rem);
  padding: 0.15rem 0 0.15rem 1.15rem;
  border: 0;
  border-left: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  backdrop-filter: none;
}

.signal-panel ul {
  display: grid;
  gap: 0.72rem;
  padding: 0;
  list-style: none;
}

.signal-panel li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: start;
  color: var(--text-soft);
  line-height: 1.5;
}

.signal-panel li::before,
.check-list li::before {
  content: "";
  width: 0.58rem;
  height: 0.58rem;
  margin-top: 0.43rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px var(--accent-glow);
}

.section-block,
.tech-section,
.page-hero {
  position: relative;
}

.section-block {
  display: grid;
  gap: 1.35rem;
}

.tech-section,
.page-hero {
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.page-hero {
  min-height: auto;
}

.page-hero h1 {
  font-size: clamp(2.9rem, 6.4vw, 5.8rem);
  line-height: 0.96;
}

.page-hero.has-image {
  min-height: min(640px, calc(100vh - 8rem));
  display: grid;
  align-items: stretch;
  border-top: 0;
  background:
    linear-gradient(90deg, rgba(2, 9, 22, 0.98) 0%, rgba(5, 17, 31, 0.86) 42%, rgba(5, 17, 31, 0.22) 100%),
    var(--page-hero-image, none) center right / cover no-repeat,
    linear-gradient(135deg, #020916, #071d34);
  color: #dceef8;
}

.page-hero.has-image .hero-grid {
  align-items: center;
  min-height: min(560px, calc(100vh - 9rem));
}

.page-hero.has-image .lead,
.page-hero.has-image .signal-panel li {
  color: #a9c3da;
}

.literacy-hero h1 {
  max-width: 50rem;
  font-size: clamp(2.65rem, 5.6vw, 5.15rem);
}

.project-detail-hero h1 {
  max-width: 44rem;
  font-size: clamp(2.65rem, 5.4vw, 5rem);
}

.section-head {
  display: grid;
  gap: 0.85rem;
  max-width: 48rem;
}

.split-layout,
.hero-grid,
.contact-grid,
.resources-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.86fr);
  align-items: start;
}

.card-grid,
.article-grid,
.project-list,
.notes-grid {
  display: grid;
  gap: 1rem;
}

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

.resource-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.article-card,
.resource-panel,
.contact-card,
.project-row,
.redirect-card {
  position: relative;
  border: 0;
  border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  border-radius: 0;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--surface) 24%, transparent),
    transparent 82%
  );
  box-shadow: none;
}

.card,
.article-card,
.resource-panel,
.contact-card,
.redirect-card {
  display: grid;
  gap: 0.72rem;
  padding: 1rem 0 0;
}

.card::before,
.article-card::before,
.project-row::before,
.resource-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 4rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
}

.card a,
.article-card a,
.resource-panel a,
.project-row a,
.inline-link {
  color: var(--accent);
  font-weight: 800;
}

.project-row {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0 0;
}

.project-thumb {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1.55;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #07111f;
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-copy {
  display: grid;
  gap: 0.45rem;
}

.project-copy h3 {
  font-size: 1.28rem;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  justify-content: flex-end;
}

.check-list {
  display: grid;
  gap: 0.72rem;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  color: var(--text-soft);
  line-height: 1.58;
}

.book-link {
  display: grid;
  gap: 0.6rem;
  min-height: 10.5rem;
}

.article-card time {
  color: var(--text-muted);
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.72rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 3.1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #02101a;
  font-weight: 900;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: start;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.footer-brand {
  display: grid;
  gap: 0.65rem;
  max-width: 32rem;
}

.footer-brand img {
  width: 8.2rem;
  padding: 0.32rem 0.44rem;
  border: 1px solid rgba(33, 215, 255, 0.28);
  border-radius: 6px;
  background: #07111f;
}

.footer-links {
  display: grid;
  gap: 0.9rem;
  justify-items: end;
}

.footer-nav {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-nav.external {
  gap: 0.65rem;
}

.footer-nav.external a {
  font-family: "IBM Plex Mono", "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.redirect-main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.redirect-card {
  width: min(100%, 34rem);
}

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

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 540ms ease, transform 540ms ease;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .site-header {
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-actions {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.9rem;
    border: 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: var(--surface-solid);
    box-shadow: none;
  }

  .header-actions.is-open {
    display: flex;
  }

  .site-nav,
  .external-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0;
    border: 0;
  }

  .site-nav a,
  .external-nav a {
    padding: 0.75rem 0;
    border: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
    border-radius: 0;
    background: transparent;
  }

  .site-nav a::after {
    display: none;
  }
}

@media (max-width: 1280px) {
  .brand-lockup {
    display: none;
  }
}

@media (max-width: 900px) {
  .site-shell {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .hero {
    min-height: auto;
  }

  .hero-inner,
  .split-layout,
  .hero-grid,
  .contact-grid,
  .resources-grid {
    grid-template-columns: 1fr;
  }

  .signal-panel {
    justify-self: stretch;
  }

  .card-grid,
  .article-grid,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  .project-row {
    grid-template-columns: 1fr;
  }

  .project-actions {
    justify-content: flex-start;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-items: start;
  }

  .footer-nav {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .site-header {
    top: 0;
  }

  .brand-logo {
    min-width: 7.4rem;
  }

  .brand-logo img {
    width: 6.7rem;
  }

  .brand-lockup {
    display: none;
  }

  h1 {
    font-size: clamp(3.05rem, 15vw, 4.25rem);
  }

  h2 {
    font-size: clamp(1.8rem, 11vw, 2.8rem);
  }

  .hero-inner,
  .tech-section,
  .page-hero {
    padding: 1rem;
  }

  .hero {
    background-position: 58% center;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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