/* REVENANT — three colors, rules and rectangles. Saul Bass, not neon. */
:root {
  --paper: #f2efe6;
  --ink: #1b1e26;
  --signal: #cc2a1c;
  --disp: "Archivo Black", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  overflow: hidden;
  background: var(--ink);
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  user-select: none;
  touch-action: none;
}

#app {
  position: fixed;
  inset: 0;
  background: var(--ink);
}
#game {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* -------- HUD -------- */
#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  padding: max(14px, env(safe-area-inset-top)) 16px 16px;
}
#hud button,
#hud input {
  pointer-events: auto;
}

#topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 8px;
}
#chamber-name {
  font-family: var(--disp);
  font-weight: 900;
  font-size: clamp(13px, 2.4vw, 18px);
  letter-spacing: 0.04em;
  color: var(--paper);
  text-transform: uppercase;
}
#chamber-hint {
  font-size: clamp(10px, 1.6vw, 13px);
  color: var(--paper);
  opacity: 0.6;
  margin-top: 2px;
  max-width: 34ch;
}
#loop-info {
  justify-self: end;
  text-align: right;
  font-family: var(--mono);
  font-size: clamp(10px, 1.6vw, 13px);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper);
  opacity: 0.85;
}

#timer-wrap {
  justify-self: center;
  text-align: center;
  transition: transform 0.12s ease;
}
#timer-wrap.hidden {
  display: none;
}
#timer {
  font-family: var(--disp);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 90px);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
#timer-wrap.urgent #timer {
  color: var(--signal);
}
#timer-wrap.urgent {
  animation: none;
}

#bottombar {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: max(14px, env(safe-area-inset-bottom));
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
}
.left-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.ghost-btn-quiet {
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(242, 239, 230, 0.35);
}
.ghost-btn-quiet:hover {
  background: var(--paper);
  color: var(--ink);
}
#controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.key {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--paper);
  opacity: 0.5;
  border: 1px solid rgba(242, 239, 230, 0.22);
  padding: 3px 6px;
  white-space: nowrap;
}
.ghost-btn {
  font-family: var(--disp);
  font-size: 12px;
  letter-spacing: 0.06em;
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 9px 14px;
  cursor: pointer;
  text-transform: uppercase;
}
.ghost-btn:hover {
  background: var(--signal);
}

#toast {
  position: absolute;
  top: 46%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.96);
  font-family: var(--disp);
  font-size: clamp(16px, 4vw, 30px);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 20px;
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
  text-align: center;
  pointer-events: none;
}
#toast.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

#hint-reveal {
  position: absolute;
  left: 50%;
  bottom: 64px;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 12px;
  background: rgba(27, 30, 38, 0.9);
  color: var(--paper);
  border: none;
  padding: 8px 14px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
#hint-reveal.show {
  opacity: 1;
  pointer-events: auto;
}
#hint-reveal b {
  color: var(--signal);
}

.scrub {
  position: absolute;
  left: 50%;
  bottom: 58px;
  transform: translateX(-50%);
  width: min(560px, 82vw);
  display: none;
}
.scrub.show {
  display: block;
}
.scrub input {
  width: 100%;
  accent-color: var(--signal);
}

/* -------- Title poster -------- */
#title {
  position: absolute;
  inset: 0;
  background: var(--paper);
  display: grid;
  place-items: center;
  z-index: 20;
  transition: opacity 0.5s ease, visibility 0.5s;
  overflow: hidden;
}
#title.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.poster {
  text-align: center;
  padding: 24px;
  max-width: 560px;
  position: relative;
}
/* the mark: YOU + three ghosts, a graphic of the whole idea */
.poster-mark {
  position: relative;
  height: 92px;
  margin: 0 auto 10px;
  width: 220px;
}
.poster-mark span {
  position: absolute;
  top: 50%;
  width: 34px;
  height: 34px;
  transform: translateY(-50%);
  background: var(--ink);
}
.poster-mark .you {
  left: 50%;
  margin-left: -17px;
  outline: 3px solid var(--paper);
  box-shadow: 0 0 0 5px var(--ink);
  z-index: 4;
}
.poster-mark .g {
  left: 50%;
  margin-left: -17px;
}
.poster-mark .g1 {
  transform: translate(-58px, -50%);
  opacity: 0.5;
}
.poster-mark .g2 {
  transform: translate(-108px, -50%);
  opacity: 0.32;
}
.poster-mark .g3 {
  transform: translate(-156px, -50%);
  opacity: 0.18;
}
.poster-title {
  font-family: var(--disp);
  font-weight: 900;
  font-size: clamp(52px, 15vw, 120px);
  letter-spacing: -0.04em;
  line-height: 0.82;
  color: var(--ink);
  text-transform: uppercase;
}
.poster-title::first-letter {
  color: var(--signal);
}
.poster-tag {
  font-family: var(--disp);
  font-size: clamp(15px, 3.4vw, 22px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin: 18px 0 20px;
  color: var(--ink);
  text-transform: uppercase;
}
.poster-how {
  max-width: 440px;
  margin: 0 auto 24px;
  text-align: left;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  padding: 14px 4px;
}
.poster-how p {
  font-size: clamp(13px, 2.6vw, 15px);
  line-height: 1.4;
  color: var(--ink);
  margin: 6px 0;
}
.poster-how b {
  color: var(--signal);
}
.start {
  font-family: var(--disp);
  font-size: clamp(15px, 3.6vw, 20px);
  letter-spacing: 0.08em;
  background: var(--signal);
  color: var(--paper);
  border: none;
  padding: 14px 26px;
  cursor: pointer;
  text-transform: uppercase;
  transition: transform 0.1s ease;
}
.start:hover {
  transform: scale(1.04);
}
.start:active {
  transform: scale(0.98);
}
.poster-foot {
  margin-top: 26px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: var(--ink);
  opacity: 0.55;
}

/* -------- Inspector -------- */
#inspector {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(12, 14, 19, 0.94);
  color: #cdd6e2;
  font-family: var(--mono);
  padding: 20px;
  overflow: auto;
  display: none;
}
#inspector.show {
  display: block;
}
.insp-head {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 14px;
  border-bottom: 1px solid #2a3140;
  padding-bottom: 10px;
}
.insp-close {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--disp);
  font-size: 12px;
  letter-spacing: 0.06em;
  background: var(--signal);
  color: var(--paper);
  border: none;
  padding: 9px 14px;
  cursor: pointer;
}
.insp-close:hover {
  background: var(--paper);
  color: var(--ink);
}
.insp-title {
  font-family: var(--disp);
  font-size: 20px;
  letter-spacing: 0.1em;
  color: #eef2f7;
}
.insp-sub {
  font-size: 12px;
  color: #7f8a9b;
}
.insp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.insp-card {
  border: 1px solid #2a3140;
  padding: 12px;
  background: rgba(20, 24, 32, 0.6);
}
.insp-card.insp-wide {
  grid-column: 1 / -1;
}
.insp-card h4 {
  font-family: var(--disp);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: #9fd8b4;
  margin-bottom: 8px;
}
.insp-mono {
  font-size: 13px;
  line-height: 1.5;
  color: #d8e0ea;
}
.insp-mono b {
  color: #fff;
}
.insp-mono .dim {
  color: #6f7a8a;
}
.insp-big {
  font-size: 22px;
  letter-spacing: 0.04em;
  color: #fff;
}
.insp-note {
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.45;
  color: #8894a5;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.insp-btn {
  font-family: var(--disp);
  font-size: 12px;
  letter-spacing: 0.06em;
  background: #9fd8b4;
  color: #0c0e13;
  border: none;
  padding: 9px 12px;
  cursor: pointer;
  margin-bottom: 8px;
}
.insp-btn:hover {
  background: #bff3cf;
}
#i-chain,
#i-frames {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 8px;
  background: #0c0e13;
  border: 1px solid #202634;
}
.ok {
  color: #7ee0a0;
}
.bad {
  color: var(--signal);
}

@media (max-width: 560px) {
  #controls .key:nth-child(n + 4) {
    display: none;
  }
  #chamber-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  #title,
  #toast,
  .start,
  #timer-wrap {
    transition: none;
  }
}