:root {
  color-scheme: dark;
  --bg: #080b0d;
  --surface: #0d1215;
  --line: rgba(171, 205, 211, 0.16);
  --line-strong: rgba(171, 205, 211, 0.34);
  --text: #eef7f7;
  --muted: #849498;
  --accent: #9ef5e9;
  --accent-soft: rgba(158, 245, 233, 0.12);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Monaco, "Cascadia Code", Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    linear-gradient(rgba(158, 245, 233, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(158, 245, 233, 0.024) 1px, transparent 1px),
    radial-gradient(circle at 50% 48%, rgba(42, 106, 103, 0.14), transparent 46%),
    var(--bg);
  background-size: 48px 48px, 48px 48px, auto, auto;
  font-family: var(--sans);
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(115deg, transparent 25%, rgba(255, 255, 255, 0.018) 50%, transparent 75%);
  background-size: 240% 100%;
  animation: ambient-scan 14s linear infinite;
}

.instrument {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(100%, 1440px);
  min-height: 100vh;
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.instrument::before,
.instrument::after {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  content: "";
  background: linear-gradient(transparent, var(--line) 8%, var(--line) 92%, transparent);
}

.instrument::before {
  left: clamp(1.25rem, 3vw, 2.5rem);
}

.instrument::after {
  right: clamp(1.25rem, 3vw, 2.5rem);
}

.instrument__header,
.instrument__footer {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-inline: clamp(0.9rem, 2.5vw, 2rem);
}

.instrument__header {
  min-height: 4rem;
  border-block: 1px solid var(--line);
}

.identity,
.system-state {
  display: flex;
  align-items: center;
}

.identity {
  gap: 0.75rem;
}

.identity__mark {
  width: 0.7rem;
  height: 0.7rem;
  border: 1px solid var(--accent);
  transform: rotate(45deg);
  box-shadow: inset 0 0 0 2px var(--bg);
  background: var(--accent);
}

h1,
.system-state,
.telemetry dt,
.countdown__copy,
.readout__index {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
}

.system-state {
  gap: 0.55rem;
  color: var(--muted);
}

.system-state__signal {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(158, 245, 233, 0.35);
  animation: signal 2.5s ease-out infinite;
}

.readout {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  justify-items: center;
  width: min(100%, 58rem);
  margin: auto;
  padding: clamp(3rem, 8vh, 7rem) clamp(1.5rem, 5vw, 4rem);
}

.readout__index {
  width: 100%;
  margin-bottom: 1.25rem;
  color: var(--muted);
  text-align: right;
}

.token-frame {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: clamp(13rem, 36vw, 25rem);
  border-block: 1px solid var(--line-strong);
  background: linear-gradient(90deg, transparent, rgba(158, 245, 233, 0.035) 50%, transparent);
}

.token-frame::before,
.token-frame::after {
  position: absolute;
  width: 4.5rem;
  height: 1px;
  content: "";
  background: var(--accent);
}

.token-frame::before {
  left: 0;
  top: -1px;
}

.token-frame::after {
  right: 0;
  bottom: -1px;
}

.token-frame__corner {
  position: absolute;
  width: 0.55rem;
  height: 0.55rem;
  border-color: var(--line-strong);
}

.token-frame__corner--tl {
  top: 0.75rem;
  left: 0;
  border-top: 1px solid;
  border-left: 1px solid;
}

.token-frame__corner--tr {
  top: 0.75rem;
  right: 0;
  border-top: 1px solid;
  border-right: 1px solid;
}

.token-frame__corner--bl {
  bottom: 0.75rem;
  left: 0;
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.token-frame__corner--br {
  right: 0;
  bottom: 0.75rem;
  border-right: 1px solid;
  border-bottom: 1px solid;
}

.copy-button {
  position: absolute;
  z-index: 2;
  top: 1.15rem;
  right: 1.15rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.25rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  color: var(--muted);
  background: rgba(8, 11, 13, 0.7);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.copy-button svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.25;
}

.copy-button:hover,
.copy-button:focus-visible,
.copy-button.is-copied {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  outline: none;
}

.token {
  display: block;
  color: var(--text);
  font-family: var(--mono);
  font-size: clamp(5.5rem, 20vw, 14rem);
  font-variant-numeric: tabular-nums slashed-zero;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 0.86;
  text-align: center;
  text-indent: 0.06em;
  text-shadow: 0 0 2.5rem rgba(158, 245, 233, 0.12);
}

.countdown {
  width: min(100%, 32rem);
  margin-top: clamp(2rem, 5vh, 3.5rem);
}

.countdown__copy {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  color: var(--muted);
}

.countdown__copy strong {
  color: var(--accent);
  font: inherit;
  font-variant-numeric: tabular-nums;
}

.progress-track {
  position: relative;
  height: 0.35rem;
  overflow: hidden;
  background: var(--accent-soft);
}

.progress-track::after {
  position: absolute;
  inset: 0;
  content: "";
  background: repeating-linear-gradient(90deg, transparent 0 calc(10% - 1px), var(--bg) calc(10% - 1px) 10%);
}

.progress-track__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  box-shadow: 0 0 1rem rgba(158, 245, 233, 0.4);
  will-change: transform;
}

.instrument__footer {
  align-items: end;
  min-height: 5.5rem;
  padding-block: 1.1rem;
  border-block: 1px solid var(--line);
}

.telemetry {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem clamp(2rem, 5vw, 5rem);
  margin: 0;
}

.telemetry div {
  display: grid;
  gap: 0.35rem;
}

.telemetry dt {
  color: var(--muted);
}

.telemetry dd,
.utc-clock {
  margin: 0;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.utc-clock {
  flex: 0 0 auto;
  color: var(--muted);
  text-align: right;
}

@keyframes signal {
  70%,
  100% {
    box-shadow: 0 0 0 0.55rem rgba(158, 245, 233, 0);
  }
}

@keyframes ambient-scan {
  to {
    background-position: -240% 0;
  }
}

@media (max-width: 760px) {
  body {
    background-size: 32px 32px, 32px 32px, auto, auto;
  }

  .instrument__header,
  .instrument__footer {
    padding-inline: 0.8rem;
  }

  .readout {
    padding-inline: 0.8rem;
  }

  .instrument__footer {
    display: grid;
    align-content: end;
  }

  .telemetry {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .telemetry div:first-child {
    grid-column: 1 / -1;
  }

  .utc-clock {
    text-align: left;
  }
}

@media (max-width: 460px) {
  .system-state {
    font-size: 0;
  }

  .system-state::after {
    font-size: 0.75rem;
    content: "UTC";
  }

  .token {
    font-size: clamp(4.5rem, 25vw, 7rem);
  }

  .copy-button {
    top: 0.8rem;
    right: 0.7rem;
    padding-inline: 0.55rem;
  }

  .copy-button span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  body::before,
  .system-state__signal {
    animation: none;
  }
}