:root {
  --paper: #f4f4ef;
  --paper-rgb: 244, 244, 239;
  --ink: #11110f;
  --ink-rgb: 17, 17, 15;
  --muted: rgba(17, 17, 15, 0.64);
  --line: rgba(17, 17, 15, 0.24);
  --signal: #b7bd33;
  --pointer-x: 50vw;
  --pointer-y: 50vh;
  --window-shift-x: 0px;
  --window-shift-y: 0px;
  --font-sans: "Space Grotesk", Arial, sans-serif;
  --font-mono: "DM Mono", "SFMono-Regular", Consolas, monospace;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

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

html {
  background: var(--paper);
}

body {
  margin: 0;
  min-height: 100dvh;
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  transition: background-color 900ms cubic-bezier(0.65, 0, 0.35, 1), color 900ms cubic-bezier(0.65, 0, 0.35, 1);
}

body[data-state="inverse"] {
  --paper: #11110f;
  --paper-rgb: 17, 17, 15;
  --ink: #eeeee7;
  --ink-rgb: 238, 238, 231;
  --muted: rgba(238, 238, 231, 0.68);
  --line: rgba(238, 238, 231, 0.25);
  --signal: #d2d85b;
  color-scheme: dark;
}

a,
.data-stage {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.data-field,
.paper-grain {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.data-field {
  z-index: 0;
  pointer-events: none;
}

.paper-grain {
  z-index: 1;
  pointer-events: none;
  background-image: url("../images/walltexture.jpg");
  background-repeat: repeat;
  opacity: 0.28;
  mix-blend-mode: multiply;
  transition: opacity 900ms ease, filter 900ms ease;
}

body[data-state="inverse"] .paper-grain {
  opacity: 0.08;
  filter: invert(1);
  mix-blend-mode: screen;
}

.void-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: clamp(20px, 2.4vw, 34px) clamp(22px, 3vw, 46px);
  padding-top: max(clamp(20px, 2.4vw, 34px), env(safe-area-inset-top));
  padding-right: max(clamp(22px, 3vw, 46px), env(safe-area-inset-right));
  padding-left: max(clamp(22px, 3vw, 46px), env(safe-area-inset-left));
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.08em;
}

.return-link {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 4px;
  margin: -17px -4px;
  text-decoration: none;
}

.return-link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 11px;
  left: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0.32);
  transform-origin: left;
  transition: transform 180ms ease;
}

.return-link:hover::after,
.return-link:focus-visible::after {
  transform: scaleX(1);
}

.return-link:focus-visible,
.data-stage:focus-visible {
  outline: 1px solid currentColor;
  outline-offset: 6px;
}

.running-note {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  color: var(--muted);
}

.running-line {
  display: block;
  width: clamp(38px, 5vw, 76px);
  height: 1px;
  background: var(--line);
}

.data-stage {
  position: relative;
  z-index: 2;
  width: 100%;
  min-height: 100dvh;
  cursor: crosshair;
  outline: none;
  touch-action: none;
}

.field-word {
  position: absolute;
  top: 15vh;
  left: clamp(19px, 4vw, 62px);
  display: flex;
  flex-direction: column;
  margin: 0;
  color: rgba(var(--ink-rgb), 0.052);
  font-size: clamp(84px, 16vw, 260px);
  font-weight: 600;
  line-height: 0.68;
  letter-spacing: -0.095em;
  user-select: none;
  transition: color 700ms ease, letter-spacing 900ms cubic-bezier(0.65, 0, 0.35, 1);
}

body[data-state="register"] .field-word {
  color: rgba(var(--ink-rgb), 0.095);
  letter-spacing: -0.065em;
}

body[data-state="inverse"] .field-word {
  color: rgba(var(--ink-rgb), 0.075);
}

.system-window {
  position: absolute;
  border: 1px solid var(--line);
  background: rgba(var(--paper-rgb), 0.78);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
  transition: background-color 700ms ease, border-color 700ms ease, color 700ms ease, opacity 400ms ease, transform 650ms cubic-bezier(0.65, 0, 0.35, 1);
}

.system-window--reading {
  top: 21vh;
  right: clamp(22px, 5.3vw, 84px);
  width: clamp(220px, 22vw, 320px);
  transform: translate(calc(var(--window-shift-x) * -0.34), calc(var(--window-shift-y) * -0.34));
}

.window-rule {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 31px;
  padding: 7px 9px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.reading-grid {
  display: grid;
  grid-template-columns: 0.8fr 0.8fr 1.4fr;
  margin: 0;
}

.reading-grid div {
  min-width: 0;
  padding: 10px 9px 12px;
  border-right: 1px solid var(--line);
}

.reading-grid div:last-child {
  border-right: 0;
}

.reading-grid dt {
  margin: 0 0 8px;
  color: var(--muted);
}

.reading-grid dd {
  margin: 0;
  overflow: hidden;
  text-overflow: clip;
  white-space: nowrap;
}

.system-window--fragment {
  bottom: 12vh;
  left: clamp(22px, 8vw, 126px);
  width: clamp(230px, 24vw, 350px);
  opacity: 0;
  pointer-events: none;
  transform: translate(calc(var(--window-shift-x) * 0.22), calc(12px + var(--window-shift-y) * 0.22));
}

.system-window--fragment.is-visible {
  opacity: 1;
  transform: translate(calc(var(--window-shift-x) * 0.22), calc(var(--window-shift-y) * 0.22));
}

.system-window--fragment p {
  min-height: 59px;
  margin: 0;
  padding: 12px 10px 14px;
  max-width: 31ch;
}

.fragment-scale {
  height: 5px;
  border-top: 1px solid var(--line);
}

.fragment-scale span {
  display: block;
  width: 18%;
  height: 4px;
  background: var(--signal);
  transition: width 900ms cubic-bezier(0.65, 0, 0.35, 1), background-color 700ms ease;
}

body[data-state="register"] .fragment-scale span {
  width: 56%;
}

body[data-state="inverse"] .fragment-scale span {
  width: 91%;
}

.interaction-note,
.state-caption {
  position: absolute;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1.55;
  letter-spacing: 0.045em;
  color: var(--muted);
}

.interaction-note {
  right: max(clamp(22px, 4.5vw, 70px), env(safe-area-inset-right));
  bottom: max(clamp(24px, 4.5vw, 60px), env(safe-area-inset-bottom));
  text-align: right;
}

.interaction-note__mobile {
  display: none;
}

.state-caption {
  bottom: max(clamp(24px, 4.5vw, 60px), env(safe-area-inset-bottom));
  left: 50%;
  display: flex;
  gap: 30px;
  transform: translateX(-50%);
}

.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;
}

@media (max-width: 700px) {
  .void-header {
    padding-top: max(20px, env(safe-area-inset-top));
    padding-right: max(18px, env(safe-area-inset-right));
    padding-left: max(18px, env(safe-area-inset-left));
  }

  .running-note span:first-child {
    display: none;
  }

  .running-line {
    width: 40px;
  }

  .field-word {
    top: 14vh;
    left: 10px;
    font-size: clamp(78px, 28vw, 126px);
    line-height: 0.73;
  }

  .system-window--reading {
    top: auto;
    right: max(18px, env(safe-area-inset-right));
    bottom: max(14.5vh, calc(108px + env(safe-area-inset-bottom)));
    width: min(74vw, 280px);
  }

  .system-window--fragment {
    top: 31vh;
    bottom: auto;
    left: max(18px, env(safe-area-inset-left));
    width: min(67vw, 260px);
  }

  .interaction-note {
    right: max(18px, env(safe-area-inset-right));
    bottom: max(22px, env(safe-area-inset-bottom));
  }

  .interaction-note {
    font-size: 8px;
  }

  .state-caption {
    bottom: max(22px, env(safe-area-inset-bottom));
    left: max(18px, env(safe-area-inset-left));
    gap: 14px;
    transform: none;
    font-size: 8px;
  }

  .interaction-note__desktop {
    display: none;
  }

  .interaction-note__mobile {
    display: inline;
  }
}

@media (max-width: 420px) {
  .reading-grid {
    grid-template-columns: 0.7fr 0.7fr 1.25fr;
  }

  .reading-grid div {
    padding-right: 7px;
    padding-left: 7px;
  }

  .system-window--fragment p {
    min-height: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .data-stage {
    cursor: pointer;
  }
}

@media (prefers-contrast: more) {
  :root {
    --muted: rgba(17, 17, 15, 0.76);
    --line: rgba(17, 17, 15, 0.55);
  }

  body[data-state="inverse"] {
    --muted: rgba(238, 238, 231, 0.8);
    --line: rgba(238, 238, 231, 0.58);
  }
}