/*
 * IMPOSSIBLE / first-person interface
 * Mobile-first, monochrome, and dependency-free. The 3D world owns the screen;
 * this layer supplies a restrained shooter HUD and two-thumb controls.
 */

:root {
  color-scheme: light;
  --paper: #d8d5cc;
  --paper-light: #f4f1e8;
  --paper-dark: #bcb8ae;
  --ink: #11110f;
  --ink-soft: #3d3c37;
  --line: rgba(17, 17, 15, 0.48);
  --glass: rgba(216, 213, 204, 0.76);
  --safe-top: max(12px, env(safe-area-inset-top));
  --safe-right: max(12px, env(safe-area-inset-right));
  --safe-bottom: max(12px, env(safe-area-inset-bottom));
  --safe-left: max(12px, env(safe-area-inset-left));
  font-family: "Courier New", Courier, monospace;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html,
body {
  width: 100%;
  min-width: 320px;
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  color: var(--ink);
  background: var(--paper) url("../img/paper-grain.svg");
  -webkit-font-smoothing: antialiased;
}

button,
a {
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

kbd {
  font: inherit;
}

.experience {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 100dvh;
  min-height: 480px;
  overflow: hidden;
  background: var(--paper);
}

.experience::before,
.experience::after {
  position: absolute;
  z-index: 8;
  inset: 0;
  pointer-events: none;
  content: "";
}

.experience::before {
  opacity: 0.13;
  background-image:
    repeating-linear-gradient(103deg, transparent 0 8px, rgba(17, 17, 15, 0.2) 8px 9px, transparent 9px 22px),
    repeating-linear-gradient(77deg, transparent 0 15px, rgba(255, 255, 255, 0.35) 15px 16px, transparent 16px 31px);
  mix-blend-mode: multiply;
}

.experience::after {
  z-index: 9;
  box-shadow:
    inset 0 0 0 1px rgba(17, 17, 15, 0.28),
    inset 0 0 110px rgba(17, 17, 15, 0.28);
  transition: box-shadow 500ms ease;
}

.experience.is-turning::after {
  box-shadow:
    inset 0 0 0 3px rgba(17, 17, 15, 0.8),
    inset 0 0 170px rgba(17, 17, 15, 0.62);
}

.scene {
  position: absolute;
  z-index: 1;
  inset: 0;
  overflow: hidden;
  cursor: crosshair;
  touch-action: none;
}

.scene:focus-visible {
  outline: 2px solid var(--paper-light);
  outline-offset: -5px;
}

.scene canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 700ms ease;
}

.experience[data-ready="true"] .scene canvas {
  opacity: 1;
}

.experience[data-locked="true"] .scene,
.experience[data-locked="true"] .scene canvas {
  cursor: none;
}

.topbar {
  position: absolute;
  z-index: 30;
  top: var(--safe-top);
  right: var(--safe-right);
  left: var(--safe-left);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 7px 12px;
  pointer-events: none;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  width: max-content;
  min-height: 38px;
  padding: 0 11px;
  color: var(--paper-light);
  background: var(--ink);
  border: 1px solid var(--ink);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-decoration: none;
  text-transform: uppercase;
  pointer-events: auto;
}

.wordmark:hover,
.wordmark:focus-visible {
  color: var(--ink);
  background: var(--paper-light);
  outline: none;
}

.slash {
  margin: 0 0.6em;
  opacity: 0.5;
}

.zone-readout {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  align-items: baseline;
  gap: 9px;
  width: max-content;
  min-height: 26px;
  padding: 6px 9px 5px;
  color: var(--ink);
  background: rgba(244, 241, 232, 0.74);
  border: 1px solid var(--line);
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.zone-readout strong {
  font-size: 0.68rem;
}

.reset-button {
  grid-column: 2;
  grid-row: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 70px;
  min-height: 38px;
  padding: 0 10px;
  color: var(--ink);
  background: rgba(244, 241, 232, 0.78);
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  font-size: 0.59rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  pointer-events: auto;
}

.reset-button span {
  font-size: 0.95rem;
}

.reset-button:hover,
.reset-button:focus-visible,
.reset-button:active {
  color: var(--paper-light);
  background: var(--ink);
  outline: none;
}

.loading-card {
  position: absolute;
  z-index: 40;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 46px;
  width: max-content;
  max-width: calc(100% - 36px);
  padding: 0 15px;
  color: var(--paper-light);
  background: var(--ink);
  border: 1px solid var(--paper-light);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translate(-50%, -50%);
  transition: opacity 300ms ease, visibility 300ms ease;
}

.loading-mark {
  width: 14px;
  height: 14px;
  border: 1px solid currentColor;
  animation: ink-turn 1.2s steps(4, end) infinite;
}

.experience[data-ready="true"] .loading-card {
  opacity: 0;
  visibility: hidden;
}

@keyframes ink-turn {
  to { transform: rotate(1turn); }
}

.webgl-message,
.noscript-message {
  position: fixed;
  z-index: 80;
  top: 50%;
  left: 50%;
  display: grid;
  gap: 7px;
  width: min(330px, calc(100% - 40px));
  padding: 22px;
  color: var(--paper-light);
  background: var(--ink);
  border: 1px solid var(--paper-light);
  text-align: center;
  transform: translate(-50%, -50%);
}

.webgl-message span,
.noscript-message {
  font-size: 0.72rem;
  line-height: 1.5;
}

.entry-panel {
  position: absolute;
  z-index: 25;
  inset: 0;
  display: grid;
  padding: 94px var(--safe-right) 118px var(--safe-left);
  place-items: center;
  background:
    linear-gradient(90deg, rgba(17, 17, 15, 0.08), transparent 45%),
    radial-gradient(circle at 50% 50%, transparent 0 20%, rgba(17, 17, 15, 0.26) 100%);
  opacity: 0;
  visibility: hidden;
  transition: opacity 500ms ease, visibility 500ms ease;
}

.experience[data-ready="true"][data-started="false"] .entry-panel {
  opacity: 1;
  visibility: visible;
}

.experience[data-started="true"] .entry-panel {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.entry-plate {
  position: relative;
  width: min(510px, 100%);
  padding: 24px 20px 20px;
  color: var(--paper-light);
  background: rgba(17, 17, 15, 0.9);
  border: 1px solid var(--paper-light);
  box-shadow:
    10px 10px 0 rgba(17, 17, 15, 0.27),
    inset 0 0 0 4px rgba(244, 241, 232, 0.08);
  backdrop-filter: blur(10px);
}

.entry-plate::before,
.entry-plate::after {
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--paper-light);
  content: "";
}

.entry-plate::before {
  top: 8px;
  left: 8px;
  border-top: 1px solid;
  border-left: 1px solid;
}

.entry-plate::after {
  right: 8px;
  bottom: 8px;
  border-right: 1px solid;
  border-bottom: 1px solid;
}

.entry-index {
  display: block;
  margin-bottom: 13px;
  color: rgba(244, 241, 232, 0.66);
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.entry-plate h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.15rem, 11vw, 4.7rem);
  font-weight: 400;
  line-height: 0.86;
  letter-spacing: -0.055em;
  text-transform: uppercase;
}

.entry-plate p {
  max-width: 430px;
  margin: 17px 0 20px;
  color: rgba(244, 241, 232, 0.76);
  font-size: 0.68rem;
  line-height: 1.55;
}

.enter-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--paper-light);
  cursor: pointer;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.enter-button span:last-child {
  font-size: 1.1rem;
}

.enter-button:hover,
.enter-button:focus-visible {
  color: var(--paper-light);
  background: transparent;
  outline: none;
}

.entry-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 13px;
  margin-top: 15px;
  color: rgba(244, 241, 232, 0.6);
  font-size: 0.52rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.entry-controls kbd {
  color: var(--paper-light);
  font-weight: 700;
}

.fps-ui {
  opacity: 0;
  visibility: hidden;
  transition: opacity 280ms ease, visibility 280ms ease;
}

.experience[data-started="true"] .fps-ui {
  opacity: 1;
  visibility: visible;
}

.crosshair {
  position: absolute;
  z-index: 20;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  pointer-events: none;
  transform: translate(-50%, -50%);
}

.crosshair span {
  position: absolute;
  background: var(--paper-light);
  box-shadow: 0 0 0 1px rgba(17, 17, 15, 0.62);
}

.crosshair span:nth-child(1),
.crosshair span:nth-child(2) {
  top: 19px;
  width: 10px;
  height: 1px;
}

.crosshair span:nth-child(1) { left: 1px; }
.crosshair span:nth-child(2) { right: 1px; }

.crosshair span:nth-child(3),
.crosshair span:nth-child(4) {
  left: 19px;
  width: 1px;
  height: 10px;
}

.crosshair span:nth-child(3) { top: 1px; }
.crosshair span:nth-child(4) { bottom: 1px; }

.crosshair i {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 3px;
  height: 3px;
  background: var(--ink);
  border: 1px solid var(--paper-light);
  border-radius: 50%;
}

.experience.is-firing .crosshair {
  transform: translate(-50%, -50%) scale(1.26);
}

.threshold-flash {
  position: absolute;
  z-index: 21;
  top: 50%;
  left: 50%;
  display: grid;
  min-width: 190px;
  padding: 10px 14px;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--ink);
  box-shadow: 7px 7px 0 rgba(17, 17, 15, 0.28);
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.94);
}

.threshold-flash span {
  font-size: 0.54rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.threshold-flash strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 400;
  line-height: 1;
}

.threshold-flash.is-visible {
  animation: gravity-flash 1.05s ease both;
}

.threshold-flash:not(.is-visible) {
  opacity: 0 !important;
}

@keyframes gravity-flash {
  0% { opacity: 0; transform: translate(-50%, -43%) scale(0.92); }
  16%, 66% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -58%) scale(0.96); }
}

.impact-readout {
  position: absolute;
  z-index: 20;
  top: calc(50% + 30px);
  left: 50%;
  padding: 3px 6px;
  color: var(--paper-light);
  background: rgba(17, 17, 15, 0.72);
  font-size: 0.5rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  pointer-events: none;
  transform: translateX(-50%);
}

.impact-readout:not(.is-visible) {
  opacity: 0 !important;
}

.desktop-hud,
.capture-hint {
  display: none;
}

.mobile-controls {
  position: absolute;
  z-index: 32;
  inset: 0;
  pointer-events: none;
}

.move-pad {
  position: absolute;
  bottom: calc(var(--safe-bottom) + 20px);
  left: var(--safe-left);
  display: grid;
  grid-template-columns: repeat(3, 42px);
  grid-template-rows: repeat(3, 42px);
  gap: 2px;
  width: 130px;
  height: 130px;
  pointer-events: auto;
  transform: rotate(-1deg);
}

.pad-button {
  display: grid;
  color: var(--paper-light);
  background: rgba(17, 17, 15, 0.76);
  border: 1px solid rgba(244, 241, 232, 0.72);
  border-radius: 4px;
  cursor: pointer;
  font-family: Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1;
  place-items: center;
  touch-action: none;
  user-select: none;
}

.pad-button.is-active,
.pad-button:active {
  color: var(--ink);
  background: var(--paper-light);
  transform: scale(0.94);
}

.pad-forward { grid-column: 2; grid-row: 1; }
.pad-left { grid-column: 1; grid-row: 2; }
.pad-right { grid-column: 3; grid-row: 2; }
.pad-back { grid-column: 2; grid-row: 3; }

.pad-center {
  grid-column: 2;
  grid-row: 2;
  margin: 11px;
  background: var(--ink);
  border: 1px solid var(--paper-light);
  border-radius: 50%;
}

.look-pad {
  position: absolute;
  right: var(--safe-right);
  bottom: calc(var(--safe-bottom) + 19px);
  display: grid;
  width: 118px;
  height: 118px;
  color: var(--paper-light);
  background: rgba(17, 17, 15, 0.34);
  border: 1px dashed rgba(244, 241, 232, 0.72);
  border-radius: 50%;
  cursor: move;
  place-content: center;
  text-align: center;
  pointer-events: auto;
  touch-action: none;
  user-select: none;
}

.look-pad strong {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.look-pad small {
  margin-top: 3px;
  font-size: 0.49rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.look-corners::before,
.look-corners::after {
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(244, 241, 232, 0.75);
  content: "";
  transform: translate(-50%, -50%);
}

.look-corners::before { width: 28px; height: 1px; }
.look-corners::after { width: 1px; height: 28px; }

.fire-button {
  position: absolute;
  right: calc(var(--safe-right) + 18px);
  bottom: calc(var(--safe-bottom) + 142px);
  display: grid;
  width: 72px;
  height: 72px;
  color: var(--ink);
  background: var(--paper-light);
  border: 4px double var(--ink);
  border-radius: 50%;
  box-shadow: 0 5px 0 rgba(17, 17, 15, 0.3);
  cursor: crosshair;
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  place-items: center;
  text-transform: uppercase;
  pointer-events: auto;
  touch-action: none;
  user-select: none;
}

.fire-button.is-active,
.fire-button:active {
  color: var(--paper-light);
  background: var(--ink);
  box-shadow: 0 2px 0 rgba(17, 17, 15, 0.4);
  transform: translateY(3px);
}

.sprint-indicator {
  position: absolute;
  z-index: 20;
  bottom: calc(var(--safe-bottom) + 161px);
  left: calc(var(--safe-left) + 6px);
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--paper-light);
  font-size: 0.49rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  pointer-events: none;
}

.sprint-indicator span {
  display: block;
  width: 25px;
  height: 3px;
  background: currentColor;
  transform: scaleX(0.25);
  transform-origin: left;
  transition: transform 160ms ease;
}

.sprint-indicator.is-active span {
  transform: scaleX(1);
}

.folio {
  position: absolute;
  z-index: 18;
  right: var(--safe-right);
  bottom: max(6px, env(safe-area-inset-bottom));
  left: var(--safe-left);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: rgba(244, 241, 232, 0.76);
  font-size: 0.45rem;
  letter-spacing: 0.08em;
  text-shadow: 0 1px 1px var(--ink);
  text-transform: uppercase;
  pointer-events: none;
}

@media (pointer: fine) and (min-width: 700px) {
  .topbar {
    top: max(18px, env(safe-area-inset-top));
    right: max(22px, env(safe-area-inset-right));
    left: max(22px, env(safe-area-inset-left));
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
  }

  .zone-readout {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
  }

  .reset-button {
    grid-column: 3;
    justify-self: end;
  }

  .entry-panel {
    justify-items: start;
    padding: 90px max(6vw, 60px) 70px;
  }

  .entry-plate {
    padding: 31px 30px 26px;
  }

  .entry-controls {
    grid-template-columns: repeat(4, auto);
  }

  .mobile-controls,
  .sprint-indicator {
    display: none;
  }

  .desktop-hud {
    position: absolute;
    z-index: 20;
    bottom: max(25px, env(safe-area-inset-bottom));
    left: max(22px, env(safe-area-inset-left));
    display: flex;
    gap: 16px;
    padding: 9px 11px;
    color: rgba(244, 241, 232, 0.72);
    background: rgba(17, 17, 15, 0.58);
    border: 1px solid rgba(244, 241, 232, 0.32);
    font-size: 0.5rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    backdrop-filter: blur(5px);
    pointer-events: none;
  }

  .desktop-hud b {
    color: var(--paper-light);
  }

  .capture-hint {
    position: absolute;
    z-index: 20;
    right: max(22px, env(safe-area-inset-right));
    bottom: max(25px, env(safe-area-inset-bottom));
    display: block;
    padding: 9px 11px;
    color: var(--paper-light);
    background: rgba(17, 17, 15, 0.58);
    border: 1px solid rgba(244, 241, 232, 0.32);
    font-size: 0.5rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    pointer-events: none;
  }

  .experience[data-locked="true"] .capture-hint {
    opacity: 0;
  }

  .folio {
    display: none;
  }
}

@media (max-height: 640px) {
  .entry-panel {
    padding-top: 66px;
    padding-bottom: 75px;
  }

  .entry-plate {
    padding: 18px;
  }

  .entry-plate h1 {
    font-size: 1.9rem;
  }

  .entry-plate p {
    margin: 10px 0 13px;
  }

  .entry-controls {
    display: none;
  }

  .move-pad {
    grid-template-columns: repeat(3, 37px);
    grid-template-rows: repeat(3, 37px);
    width: 115px;
    height: 115px;
  }

  .look-pad {
    width: 102px;
    height: 102px;
  }

  .fire-button {
    right: calc(var(--safe-right) + 12px);
    bottom: calc(var(--safe-bottom) + 117px);
    width: 62px;
    height: 62px;
  }

  .sprint-indicator {
    display: none;
  }
}

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