@font-face {
  font-family: 'Space Grotesk';
  src: url('assets/fonts/space-grotesk.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('assets/fonts/ibm-plex-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'IBM Plex Mono';
  src: url('assets/fonts/ibm-plex-mono-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --abyss: #08111b;
  --hull: #0e1a28;
  --line: rgba(233, 242, 252, 0.09);
  --line-strong: rgba(233, 242, 252, 0.16);
  --foam: #e9f2fc;
  --fog: #8a9bb2;
  --signal: #5bd6ac;
  --signal-ink: #04251b;
  --font-sans: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --r-win: 14px;
  --shadow-shot: 0 24px 70px rgba(2, 8, 16, 0.6), 0 1px 0 rgba(255, 255, 255, 0.05) inset;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background: var(--abyss);
  color: var(--foam);
  font: 400 1rem / 1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

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

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

ul {
  list-style: none;
}

::selection {
  background: rgba(91, 214, 172, 0.28);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--signal);
  color: var(--signal-ink);
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
}

.skip:focus {
  left: 0;
}

h1,
h2,
h3 {
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.55rem, 1.1rem + 1.8vw, 2.15rem);
}

h3 {
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}

p {
  color: var(--fog);
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 17, 27, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav__in {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand img {
  width: 24px;
  height: auto;
}

.nav__links {
  display: flex;
  gap: 28px;
  margin-inline: auto;
}

.nav__links a {
  font-size: 0.9375rem;
  color: var(--fog);
  transition: color 0.2s;
}

.nav__links a:hover {
  color: var(--foam);
}

.nav__cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang {
  font: 500 0.855rem / 1 var(--font-sans);
  color: var(--fog);
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.lang:hover {
  color: var(--foam);
  border-color: rgba(233, 242, 252, 0.3);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: 500 0.9375rem / 1 var(--font-sans);
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform 0.22s cubic-bezier(0.2, 0.7, 0.3, 1), background-color 0.22s, border-color 0.22s;
}

.btn--sm {
  padding: 10px 18px;
  font-size: 0.9rem;
}

.btn--primary {
  background: var(--signal);
  color: var(--signal-ink);
}

.btn--primary:hover {
  background: #6fe0ba;
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0) scale(0.98);
}

.btn--ghost {
  border-color: var(--line-strong);
  color: var(--foam);
}

.btn--ghost:hover {
  border-color: rgba(233, 242, 252, 0.32);
  background: rgba(233, 242, 252, 0.05);
  transform: translateY(-1px);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 84px 0 100px;
}

.dotfield {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-image: radial-gradient(rgba(138, 155, 178, 0.17) 1px, transparent 1.7px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 55%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 55%, transparent 100%);
}

.dotfield::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(91, 214, 172, 0.9) 1px, transparent 1.8px);
  background-size: 26px 26px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(105deg, transparent 0 10%, #000 25% 45%, transparent 62%);
  mask-image: linear-gradient(105deg, transparent 0 10%, #000 25% 45%, transparent 62%);
  -webkit-mask-size: 340% 100%;
  mask-size: 340% 100%;
  -webkit-mask-position: 135% 0;
  mask-position: 135% 0;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  animation: sweep 2s cubic-bezier(0.3, 0.6, 0.3, 1) 0.2s both;
}

@keyframes sweep {
  to {
    -webkit-mask-position: -60% 0;
    mask-position: -60% 0;
  }
}

.rise {
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.85s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px;
  align-items: center;
}

.hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
  max-width: 560px;
}

h1 {
  font-size: clamp(2.35rem, 1.5rem + 3.4vw, 3.7rem);
  letter-spacing: -0.03em;
}

.hero__sub {
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 46ch;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero__copy .rise:nth-child(1) {
  animation-delay: 0.05s;
}

.hero__copy .rise:nth-child(2) {
  animation-delay: 0.16s;
}

.hero__copy .rise:nth-child(3) {
  animation-delay: 0.27s;
}

.hero__grid > figure.rise {
  animation-delay: 0.3s;
}

@media (min-width: 1280px) {
  .hero__grid > .shot--hero {
    margin-right: calc((100vw - 1180px) / -2);
  }
}

/* ---------- shots ---------- */

.shot {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-win);
  background: var(--hull);
  overflow: hidden;
  box-shadow: var(--shadow-shot);
}

.shot img {
  width: 100%;
}

.shot-zoom {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
}

.shot__cap {
  margin-top: 16px;
  font-size: 0.85rem;
  line-height: 1.6;
  max-width: 56ch;
}

/* ---------- sections ---------- */

.sec {
  padding: 100px 0;
}

.sec__close {
  margin-top: 44px;
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 62ch;
}

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}

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

/* ---------- verify steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 44px;
  position: relative;
  margin-top: 12px;
}

.steps::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 0;
  right: 0;
  border-top: 1px dotted rgba(138, 155, 178, 0.3);
}

.step__num {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-bottom: 18px;
  padding-right: 14px;
  background: var(--abyss);
  font: 500 0.8125rem / 1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--signal);
}

.step h3 {
  margin-bottom: 10px;
}

.step p {
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 40ch;
}

/* ---------- screens rail ---------- */

.rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: clamp(300px, 44vw, 620px);
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px calc(max(24px, (100vw - 1180px) / 2)) 26px;
  scroll-padding-inline: calc(max(24px, (100vw - 1180px) / 2));
  scrollbar-width: thin;
  scrollbar-color: rgba(138, 155, 178, 0.35) transparent;
}

.rail::-webkit-scrollbar {
  height: 8px;
}

.rail::-webkit-scrollbar-thumb {
  background: rgba(138, 155, 178, 0.35);
  border-radius: 999px;
}

.rail::-webkit-scrollbar-track {
  background: transparent;
}

.card-shot {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-shot .shot {
  box-shadow: 0 18px 50px rgba(2, 8, 16, 0.5), 0 1px 0 rgba(255, 255, 255, 0.04) inset;
}

.card-shot h3 {
  margin-top: 6px;
}

.card-shot p {
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 52ch;
}

#screens h2 {
  margin-bottom: 40px;
}

/* ---------- protocols / sources ---------- */

.protos {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 64px;
  margin-top: 44px;
}

.protos__col h3 {
  margin-bottom: 18px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.chip {
  font: 400 0.8125rem / 1 var(--font-mono);
  color: var(--foam);
  background: rgba(233, 242, 252, 0.03);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 9px 14px;
}

.note {
  font: 400 0.8125rem / 1.6 var(--font-mono);
  color: var(--fog);
}

.protos__col > p:not(.note) {
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 52ch;
}

.protos__col + .protos__col {
  border-left: 1px solid var(--line);
  padding-left: 64px;
}

/* ---------- split ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 64px;
  align-items: center;
}

.split__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.split__copy h2 {
  margin-bottom: 6px;
}

.split__copy p:not(.note) {
  font-size: 0.9625rem;
  line-height: 1.68;
  max-width: 50ch;
}

/* ---------- inside ---------- */

.inside {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 56px;
  margin-top: 48px;
}

.cluster h3 {
  padding-bottom: 14px;
}

.kv {
  border-top: 1px solid var(--line);
  padding-top: 6px;
}

.kv__row {
  padding: 12px 0;
}

.kv__row dt {
  font: 400 0.75rem / 1 var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--fog);
  margin-bottom: 7px;
}

.kv__row dd {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(233, 242, 252, 0.86);
}

/* ---------- warning ---------- */

.warn {
  border-block: 1px solid var(--line-strong);
  background: var(--hull);
  padding: 88px 0;
}

.warn h2 {
  max-width: 24ch;
}

.warn p {
  margin-top: 22px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(233, 242, 252, 0.85);
  max-width: 66ch;
}

.warn .warn__close {
  margin-top: 26px;
  font-size: 1rem;
  color: var(--fog);
}

/* ---------- final cta ---------- */

.cta {
  text-align: center;
  padding: 130px 0 110px;
}

.cta__logo {
  width: 52px;
  margin: 0 auto 28px;
}

.cta h2 {
  font-size: clamp(1.8rem, 1.2rem + 2.2vw, 2.6rem);
  max-width: 22ch;
  margin-inline: auto;
}

.cta p {
  margin: 18px auto 0;
  font-size: 1.0625rem;
  max-width: 48ch;
}

.cta__row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

/* ---------- lightbox ---------- */

html.lb-open {
  overflow: hidden;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(4, 9, 15, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.25s;
}

.lightbox[hidden] {
  display: none;
}

.lightbox.open {
  opacity: 1;
}

.lightbox img {
  max-width: min(1400px, 94vw);
  max-height: 90vh;
  width: auto;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-win);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.6);
  transform: scale(0.97);
  transition: transform 0.25s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.lightbox.open img {
  transform: scale(1);
}

.lightbox__close {
  position: fixed;
  top: 22px;
  right: 24px;
  z-index: 1;
  font: 500 0.9375rem / 1 var(--font-sans);
  color: var(--foam);
  background: rgba(14, 26, 40, 0.8);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 10px 18px;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

.lightbox__close:hover {
  border-color: rgba(233, 242, 252, 0.32);
  background: rgba(233, 242, 252, 0.06);
}

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--line);
  padding: 40px 0 56px;
}

.foot__in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.foot p {
  font-size: 0.9rem;
}

.foot nav {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
}

.foot nav a {
  font-size: 0.9rem;
  color: var(--fog);
  transition: color 0.2s;
}

.foot nav a:hover {
  color: var(--foam);
}

/* ---------- responsive ---------- */

@media (max-width: 1024px) {
  .hero {
    padding: 64px 0 80px;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero__copy {
    max-width: 640px;
  }
}

@media (max-width: 1000px) {
  .inside {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

@media (max-width: 900px) {
  .protos {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .protos__col + .protos__col {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 44px;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 860px) {
  .nav__links {
    display: none;
  }

  .nav__cta {
    margin-left: auto;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .steps::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .sec {
    padding: 68px 0;
  }

  .cta {
    padding: 90px 0 80px;
  }

  .warn {
    padding: 64px 0;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(1180px, 100% - 40px);
  }

  .nav__dl {
    display: none;
  }
}

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

  .rise {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .dotfield::after {
    animation: none;
    opacity: 0;
  }

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

  .lightbox,
  .lightbox img {
    transition: none;
  }

  .btn--primary:hover,
  .btn--ghost:hover {
    transform: none;
  }
}