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

@font-face {
  font-family: "IBM Plex Mono";
  src: url("/ibm-plex-mono-600.woff2") format("woff2");
  font-display: swap;
  font-style: normal;
  font-weight: 600;
}

:root {
  color-scheme: dark;
  --paper: #d8d8cf;
  --dim: #73736e;
  --black: #090908;
  --red: #b82032;
  --line: rgba(216, 216, 207, 0.24);
  font-family: "IBM Plex Mono", "Cascadia Mono", "Courier New", monospace;
}

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

html, body {
  width: 100%;
  min-height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--black);
  color: var(--paper);
}

button, kbd {
  font: inherit;
}

.apparatus {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  background: #090908;
}

.apparatus::before,
.apparatus::after {
  position: absolute;
  z-index: 4;
  content: "";
  pointer-events: none;
}

.apparatus::before {
  inset: 18px;
  border: 1px solid rgba(216, 216, 207, 0.11);
}

.apparatus::after {
  top: 18px;
  left: 18px;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--paper);
  border-left: 2px solid var(--paper);
}

.scene {
  position: absolute;
  z-index: 1;
  inset: 0;
  cursor: crosshair;
  touch-action: manipulation;
}

.scene canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.grain {
  position: absolute;
  z-index: 3;
  inset: -30%;
  background: url("/noise.svg") repeat;
  opacity: 0.16;
  mix-blend-mode: screen;
  pointer-events: none;
  transform: rotate(0.01deg);
}

.static-fallback {
  position: absolute;
  z-index: 1;
  top: 48%;
  left: 62%;
  display: none;
  width: min(460px, 72vw);
  height: auto;
  transform: translate(-50%, -50%);
  filter: grayscale(0.45) contrast(1.15);
}

.no-webgl .scene {
  display: none;
}

.no-webgl .static-fallback {
  display: block;
}

.registry {
  position: absolute;
  z-index: 5;
  top: max(38px, env(safe-area-inset-top));
  left: max(42px, env(safe-area-inset-left));
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1;
  pointer-events: none;
}

.registry-mark {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.registry-index {
  color: var(--red);
  font-size: 0.68rem;
}

.classification {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: max(34px, env(safe-area-inset-left));
  display: flex;
  gap: 16px;
  color: var(--dim);
  font-size: 0.57rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transform: translateY(-50%) rotate(-90deg) translateX(-50%);
  transform-origin: left top;
  pointer-events: none;
}

.classification span:first-child {
  color: rgba(216, 216, 207, 0.7);
}

.locator {
  position: absolute;
  z-index: 5;
  color: rgba(216, 216, 207, 0.38);
  font-size: 0.54rem;
  letter-spacing: 0.12em;
  pointer-events: none;
}

.locator-a {
  top: max(40px, env(safe-area-inset-top));
  right: max(42px, env(safe-area-inset-right));
}

.locator-b {
  right: max(42px, env(safe-area-inset-right));
  bottom: max(38px, env(safe-area-inset-bottom));
}

.terminal {
  position: absolute;
  z-index: 6;
  bottom: max(42px, env(safe-area-inset-bottom));
  left: max(64px, calc(env(safe-area-inset-left) + 24px));
  display: grid;
  width: 320px;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "status action"
    "hint action";
  align-items: center;
  gap: 9px 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(216, 216, 207, 0.52);
}

.terminal::before {
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  content: "";
  background: var(--paper);
}

.terminal-status {
  grid-area: status;
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.status-led {
  width: 7px;
  height: 7px;
  background: var(--paper);
}

.terminal.guardian-result .status-led {
  background: #6da2af;
}

.terminal.slashed-result .status-led {
  background: var(--red);
}

.terminal.flipping .status-led {
  animation: hard-blink 260ms steps(1, end) infinite;
}

.input-hint {
  grid-area: hint;
  color: var(--dim);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
}

.input-hint kbd {
  color: rgba(216, 216, 207, 0.68);
}

.flip-button {
  grid-area: action;
  min-width: 100px;
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid rgba(216, 216, 207, 0.7);
  border-radius: 0;
  background: transparent;
  color: var(--paper);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  white-space: nowrap;
  cursor: pointer;
  transition: none;
}

.flip-button:hover:not(:disabled),
.flip-button:focus-visible {
  outline: none;
  background: var(--paper);
  color: var(--black);
}

.flip-button:active:not(:disabled) {
  transform: translate(2px, 2px);
}

.flip-button:disabled {
  cursor: wait;
  opacity: 0.36;
}

.loader {
  position: absolute;
  z-index: 9;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 0 0 max(44px, env(safe-area-inset-bottom)) max(44px, env(safe-area-inset-left));
  background: var(--black);
  color: var(--paper);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  transition: opacity 180ms linear, visibility 180ms linear;
}

.loader.hidden {
  visibility: hidden;
  opacity: 0;
}

.loader-cursor {
  animation: hard-blink 520ms steps(1, end) infinite;
}

.noscript-message {
  position: fixed;
  z-index: 10;
  right: 24px;
  bottom: 24px;
  left: 24px;
  margin: 0;
  color: var(--paper);
  font-size: 0.7rem;
  text-align: center;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  clip-path: inset(50%) !important;
}

@keyframes hard-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@media (max-width: 760px) {
  .apparatus::before {
    inset: 10px;
  }

  .apparatus::after {
    top: 10px;
    left: 10px;
    width: 24px;
    height: 24px;
  }

  .registry {
    top: max(26px, env(safe-area-inset-top));
    left: max(28px, env(safe-area-inset-left));
  }

  .locator-a {
    top: max(28px, env(safe-area-inset-top));
    right: max(28px, env(safe-area-inset-right));
  }

  .locator-b,
  .classification {
    display: none;
  }

  .terminal {
    right: max(26px, env(safe-area-inset-right));
    bottom: max(28px, env(safe-area-inset-bottom));
    left: max(26px, env(safe-area-inset-left));
    width: auto;
  }

  .static-fallback {
    top: 45%;
    left: 50%;
  }
}

@media (max-width: 430px) {
  .registry-mark {
    font-size: 0.76rem;
  }

  .locator-a {
    font-size: 0.48rem;
  }

  .terminal {
    grid-template-columns: 1fr 110px;
    gap: 8px 14px;
  }

  .flip-button {
    min-width: 110px;
    min-height: 48px;
  }
}

@media (max-height: 620px) {
  .terminal {
    bottom: max(24px, env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}