/* ==========================================================================
   Nocturne — endless archive
   ========================================================================== */

:root {
  --bg: #000;
  --fg: #ece7de;
  --fg-dim: rgba(236, 231, 222, 0.55);
  --fg-faint: rgba(236, 231, 222, 0.22);
  --line: rgba(236, 231, 222, 0.16);
  --accent: #ece7de;

  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --sans: 'Inter Tight', 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.7, 0, 0.2, 1);
  --gutter: clamp(16px, 2.6vw, 40px);
}

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

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font: 400 14px/1.45 var(--sans);
  letter-spacing: 0.005em;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 4px;
}

::selection {
  background: var(--fg);
  color: #000;
}

.stage,
.webgl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.webgl {
  display: block;
  touch-action: none;
  cursor: grab;
}

.is-dragging .webgl {
  cursor: grabbing;
}

.is-hovering .webgl {
  cursor: pointer;
}

.has-cursor,
.has-cursor * {
  cursor: none !important;
}

/* Atmosphere ---------------------------------------------------------------- */

.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 50%, transparent 55%, rgba(0, 0, 0, 0.7) 100%);
  z-index: 1;
}

.grain {
  position: fixed;
  inset: -50%;
  pointer-events: none;
  z-index: 2;
  opacity: 0.07;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 0.9s steps(6) infinite;
  mix-blend-mode: overlay;
}

@keyframes grain {
  0% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -4%); }
  60% { transform: translate(-4%, -1%); }
  80% { transform: translate(3%, 3%); }
  100% { transform: translate(0, 0); }
}

/* Utility ---------------------------------------------------------------------- */

.only-touch { display: none; }
.is-touch .only-touch { display: inline; }
.is-touch .only-pointer { display: none; }

.mono,
.hud__caption,
.hud__num,
.hud__sub,
.hud__hint,
.hud__sound,
.detail__top,
.detail__kicker,
.detail__meta dt,
.detail__nav,
.loader__top,
.loader__bottom {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* HUD ---------------------------------------------------------------------------- */

.hud {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  padding: var(--gutter);
  padding-top: max(var(--gutter), env(safe-area-inset-top));
  padding-bottom: max(var(--gutter), env(safe-area-inset-bottom));
  transition: opacity 0.8s var(--ease-out);
}

.hud.is-muted {
  opacity: 0;
}

.hud.is-muted .hud__controls {
  pointer-events: none;
}

.hud__item {
  position: absolute;
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 1.2s var(--ease-out) calc(var(--d) * 110ms),
    transform 1.4s var(--ease-out) calc(var(--d) * 110ms);
}

.hud.is-visible .hud__item {
  opacity: 1;
  transform: none;
}

.hud__brand {
  top: var(--gutter);
  left: var(--gutter);
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.hud__mark {
  font: italic 400 30px/0.9 var(--serif);
  letter-spacing: -0.01em;
}

.hud__sub {
  color: var(--fg-dim);
  font-size: 10px;
  line-height: 1.5;
  padding-top: 2px;
}

.hud__room {
  top: var(--gutter);
  right: var(--gutter);
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.hud__caption {
  color: var(--fg-dim);
  font-size: 10px;
}

.hud__room .roll {
  font: italic 400 30px/1 var(--serif);
}

.hud__room .num {
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  vertical-align: 0.9em;
  margin-right: 6px;
  color: var(--fg-dim);
  font-style: normal;
}

.hud__work {
  left: var(--gutter);
  bottom: var(--gutter);
  display: flex;
  align-items: baseline;
  gap: 14px;
  max-width: 50vw;
}

.hud__num {
  color: var(--fg-dim);
}

.hud__title {
  font: 400 clamp(26px, 3vw, 40px) / 1 var(--serif);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.roll {
  display: inline-block;
  transition: opacity 0.18s linear, transform 0.18s ease-in;
}

.roll.is-out {
  opacity: 0;
  transform: translateY(-35%);
}

.roll.is-in {
  animation: roll-in 0.7s var(--ease-out) both;
}

@keyframes roll-in {
  from { opacity: 0; transform: translateY(45%); }
  to { opacity: 1; transform: none; }
}

.hud__hint {
  left: 50%;
  bottom: var(--gutter);
  margin: 0;
  translate: -50% 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--fg-dim);
  font-size: 10px;
  white-space: nowrap;
}

.hud__hint.is-gone {
  opacity: 0 !important;
  transition: opacity 1.6s var(--ease-out);
}

.hud__hint-line {
  width: 28px;
  height: 1px;
  background: var(--fg-dim);
  transform-origin: left;
  animation: hint-line 2.4s var(--ease-in-out) infinite;
}

@keyframes hint-line {
  0% { transform: scaleX(0); transform-origin: left; }
  45% { transform: scaleX(1); transform-origin: left; }
  55% { transform: scaleX(1); transform-origin: right; }
  100% { transform: scaleX(0); transform-origin: right; }
}

.hud__controls {
  right: var(--gutter);
  bottom: var(--gutter);
  display: flex;
  align-items: center;
  gap: 22px;
  pointer-events: auto;
}

.hud__track {
  width: 120px;
  height: 1px;
  background: var(--line);
  overflow: hidden;
}

.hud__track span {
  display: block;
  height: 100%;
  background: var(--fg);
  transform-origin: left;
  transform: scaleX(0);
}

.hud__sound {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-dim);
  font-size: 10px;
  padding: 8px 0;
  transition: color 0.4s var(--ease-out);
}

.hud__sound:hover,
.hud__sound[aria-pressed='true'] {
  color: var(--fg);
}

.hud__eq {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 10px;
}

.hud__eq i {
  width: 2px;
  height: 2px;
  background: currentColor;
  transition: height 0.4s var(--ease-out);
}

.hud__sound[aria-pressed='true'] .hud__eq i {
  animation: eq 1.1s ease-in-out infinite alternate;
}

.hud__sound[aria-pressed='true'] .hud__eq i:nth-child(2) { animation-delay: -0.4s; }
.hud__sound[aria-pressed='true'] .hud__eq i:nth-child(3) { animation-delay: -0.8s; }

@keyframes eq {
  from { height: 2px; }
  to { height: 10px; }
}

/* Keyboard index: invisible until focused into. */
.hud__index {
  position: absolute;
  left: var(--gutter);
  top: 50%;
  translate: 0 -50%;
  pointer-events: auto;
  clip-path: inset(50%);
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.hud__index:focus-within {
  clip-path: none;
  width: auto;
  height: auto;
  max-height: 80vh;
  overflow: auto;
  padding: 20px 24px;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  z-index: 5;
}

.hud__index h2 {
  font: 500 10px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 12px;
}

.hud__index ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hud__index button {
  display: block;
  padding: 4px 0;
  font: 400 18px/1.3 var(--serif);
  text-align: left;
}

/* Detail view -------------------------------------------------------------------- */

.detail {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  padding: var(--gutter);
  padding-top: max(var(--gutter), env(safe-area-inset-top));
  padding-bottom: max(var(--gutter), env(safe-area-inset-bottom));
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.detail:focus {
  outline: none;
}

.detail[hidden] {
  display: none;
}

.letterbox {
  position: absolute;
  left: 0;
  right: 0;
  height: 7vh;
  background: #000;
  transform: scaleY(0);
  transition: transform 1.2s var(--ease-in-out);
}

.letterbox--top { top: 0; transform-origin: top; }
.letterbox--bottom { bottom: 0; transform-origin: bottom; }

.detail.is-framing .letterbox {
  transform: scaleY(1);
  transition-delay: 0.15s;
}

.detail__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.25) 45%, transparent 70%),
    linear-gradient(to right, rgba(0, 0, 0, 0.55) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 1s var(--ease-out);
}

.detail.is-open .detail__shade {
  opacity: 1;
}

.detail__top,
.detail__body,
.detail__nav {
  position: relative;
  z-index: 1;
}

.detail__top {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 10px;
}

.detail__room {
  color: var(--fg-dim);
}

.detail__close {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  pointer-events: auto;
  padding: 10px 0;
}

.detail__x {
  position: relative;
  width: 26px;
  height: 26px;
  border: 1px solid var(--fg-faint);
  border-radius: 50%;
  transition: border-color 0.4s var(--ease-out), transform 0.6s var(--ease-out);
}

.detail__x::before,
.detail__x::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1px;
  background: currentColor;
  translate: -50% -50%;
  rotate: 45deg;
}

.detail__x::after {
  rotate: -45deg;
}

.detail__close:hover .detail__x {
  border-color: var(--fg);
  transform: rotate(90deg);
}

.detail__body {
  align-self: end;
  max-width: min(760px, 100%);
  padding-bottom: 28px;
}

.detail__kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 10px;
}

.detail__title {
  margin: 0 0 26px;
  font: 400 clamp(52px, 8.4vw, 150px) / 0.88 var(--serif);
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.detail__title .mask {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
  padding-bottom: 0.08em;
  margin-bottom: -0.08em;
}

.detail__title .mask > span {
  display: inline-block;
  transform: translateY(110%) rotate(4deg);
  transform-origin: left bottom;
  transition: transform 0.5s var(--ease-in-out);
}

.detail.is-open .detail__title .mask > span {
  transform: none;
  transition: transform 1.3s var(--ease-out) calc(120ms + var(--i) * 80ms);
}

.detail__desc {
  margin: 0 0 30px;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.55;
  color: rgba(236, 231, 222, 0.82);
}

.detail__meta {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, auto);
  justify-content: start;
  gap: 8px 44px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.detail__meta dt {
  color: var(--fg-dim);
  font-size: 10px;
  margin-bottom: 4px;
}

.detail__meta dd {
  margin: 0;
  font-size: 13px;
}

.detail__nav {
  display: flex;
  justify-content: flex-end;
  gap: 34px;
  font-size: 10px;
}

.detail__nav button {
  pointer-events: auto;
  padding: 10px 0;
  color: var(--fg-dim);
  transition: color 0.3s var(--ease-out);
}

.detail__nav button:hover {
  color: var(--fg);
}

.detail__fade {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s linear, transform 0.5s var(--ease-in-out);
}

.detail.is-open .detail__fade {
  opacity: 1;
  transform: none;
  transition:
    opacity 1s var(--ease-out) calc(var(--d) * 90ms + 150ms),
    transform 1.2s var(--ease-out) calc(var(--d) * 90ms + 150ms);
}

/* Loader --------------------------------------------------------------------------- */

.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: #000;
  padding: var(--gutter);
  display: grid;
  grid-template-rows: auto 1fr auto;
  transition: opacity 1.4s var(--ease-in-out);
}

.loader.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.loader__top,
.loader__bottom {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--fg-dim);
}

.loader__top span:first-child span {
  color: var(--fg);
}

.loader__count {
  align-self: end;
  font: italic 400 clamp(120px, 26vw, 420px) / 0.8 var(--serif);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 18px;
}

.loader__mask {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
}

.loader__mask > span {
  display: inline-block;
  transform: translateY(105%);
  transition: transform 1.2s var(--ease-out);
}

.loader.is-active .loader__mask > span {
  transform: none;
}

.loader.is-done .loader__mask > span {
  transform: translateY(-105%);
  transition: transform 0.9s var(--ease-in-out);
}

.loader__count .loader__mask {
  padding-top: 0.06em;
}

.loader__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line);
}

.loader__bar span {
  display: block;
  height: 100%;
  background: var(--fg);
  transform-origin: left;
  transform: scaleX(0);
}

.loader.is-done .loader__bar {
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.9s var(--ease-in-out);
}

.loader.is-error .loader__count {
  opacity: 0.2;
}

/* Cursor ------------------------------------------------------------------------------ */

.cursor {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
}

.cursor.is-visible {
  opacity: 1;
}

.cursor__ring,
.cursor__dot,
.cursor__label {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  will-change: transform;
}

.cursor__dot::before,
.cursor__ring::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  border-radius: 50%;
  translate: -50% -50%;
}

.cursor__dot::before {
  width: 5px;
  height: 5px;
  background: var(--fg);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}

.cursor__ring::before {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(236, 231, 222, 0.45);
  transition:
    width 0.6s var(--ease-out),
    height 0.6s var(--ease-out),
    background-color 0.6s var(--ease-out),
    border-color 0.6s var(--ease-out);
}

.cursor__label {
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  font: 500 9px var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #000;
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}

.cursor[data-state='view'] .cursor__ring::before {
  width: 84px;
  height: 84px;
  background-color: var(--fg);
  border-color: var(--fg);
}

.cursor[data-state='view'] .cursor__label {
  opacity: 1;
}

.cursor[data-state='view'] .cursor__dot::before {
  opacity: 0;
}

.cursor[data-state='drag'] .cursor__ring::before {
  width: 52px;
  height: 52px;
  border-color: var(--fg);
}

.cursor[data-state='close'] .cursor__ring::before {
  width: 64px;
  height: 64px;
  border-color: rgba(236, 231, 222, 0.6);
  background-color: rgba(0, 0, 0, 0.25);
}

.cursor[data-state='close'] .cursor__label {
  opacity: 1;
  color: var(--fg);
}

.cursor[data-state='close'] .cursor__dot::before {
  opacity: 0;
}

/* Hovering real UI: collapse into a precise pointer. */
.cursor.is-ui .cursor__ring::before {
  width: 12px;
  height: 12px;
  background-color: transparent;
  border-color: var(--fg);
}

.cursor.is-ui .cursor__label {
  opacity: 0;
}

.cursor.is-ui .cursor__dot::before {
  opacity: 1;
}

.cursor.is-pressed .cursor__dot::before {
  transform: scale(0.5);
}

.cursor.is-pressed .cursor__ring::before {
  scale: 0.9;
}

/* Fallback ------------------------------------------------------------------------------ */

.fallback {
  position: fixed;
  inset: 0;
  overflow: auto;
  padding: clamp(24px, 6vw, 80px) var(--gutter);
  z-index: 60;
  background: #000;
}

.is-fallback,
.is-fallback body {
  overflow: auto;
}

.is-fallback .hud,
.is-fallback .detail,
.is-fallback .cursor,
.is-fallback .grain {
  display: none;
}

.fallback__mark {
  font: italic 400 28px var(--serif);
  margin: 0;
}

.fallback h1 {
  font: 400 clamp(48px, 9vw, 120px) / 0.9 var(--serif);
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
}

.fallback__note {
  color: var(--fg-dim);
  margin: 0 0 48px;
}

.fallback ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0;
}

.fallback li {
  display: grid;
  grid-template-columns: 56px 40px 1fr;
  gap: 4px 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}

.fb-swatch {
  grid-row: span 3;
  width: 56px;
  aspect-ratio: 4 / 5;
  background: linear-gradient(160deg, var(--a), var(--b));
  border-radius: 3px;
}

.fb-num {
  font: 500 11px var(--mono);
  color: var(--fg-dim);
}

.fb-title {
  font: 400 30px / 1 var(--serif);
}

.fb-meta {
  grid-column: 3;
  font: 500 10px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.fb-desc {
  grid-column: 3;
  margin: 6px 0 0;
  max-width: 60ch;
  color: rgba(236, 231, 222, 0.8);
}

.noscript {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  font: italic 400 28px var(--serif);
  z-index: 200;
  background: #000;
  margin: 0;
}

/* Responsive ------------------------------------------------------------------------------- */

@media (max-width: 760px) {
  .hud__sub,
  .hud__caption {
    display: none;
  }

  .hud__mark,
  .hud__room .roll {
    font-size: 24px;
  }

  .hud__work {
    bottom: calc(var(--gutter) + 44px);
    max-width: calc(100vw - 2 * var(--gutter));
  }

  .hud__hint {
    left: var(--gutter);
    translate: none;
    bottom: calc(var(--gutter) + 92px);
  }

  .hud__controls {
    left: var(--gutter);
    justify-content: space-between;
  }

  .hud__track {
    flex: 1;
  }

  .detail__room {
    display: none;
  }

  .detail__desc {
    font-size: 14px;
  }

  .detail__meta {
    grid-template-columns: repeat(2, auto);
    gap: 12px 28px;
  }

  .detail__meta div:last-child {
    display: none;
  }

  .detail__nav {
    justify-content: space-between;
  }

  .letterbox {
    height: 4vh;
  }
}

/* Reduced motion: keep the story, drop the travel. */
@media (prefers-reduced-motion: reduce) {
  .grain,
  .hud__hint-line,
  .hud__eq i {
    animation: none !important;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
    animation-duration: 0.01ms !important;
  }

  .detail__fade,
  .detail.is-open .detail__fade,
  .detail__shade {
    transition: opacity 0.35s linear !important;
  }

  .detail__title .mask > span {
    transform: none;
    opacity: 0;
    transition: opacity 0.35s linear !important;
  }

  .detail.is-open .detail__title .mask > span {
    opacity: 1;
  }

  .loader {
    transition: opacity 0.3s linear !important;
  }
}