/* ===========================================================
   Elements Lab — HUB
   The quiet frame around twelve loud rooms.
   =========================================================== */

@font-face {
  font-family: 'Fraunces Variable';
  src: url('/vendor/fonts/Fraunces-Variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Space Grotesk Variable';
  src: url('/vendor/fonts/SpaceGrotesk-Variable.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Newsreader Italic Variable';
  src: url('/vendor/fonts/Newsreader-Italic-Variable.woff2') format('woff2');
  font-weight: 200 800;
  font-style: italic;
  font-display: swap;
}

:root {
  --bg: #0c0b09;
  --bg-1: #131210;
  --ink: #f3efe6;
  --ink-dim: #a39a8b;
  --ink-faint: #6b6357;
  --accent: #c99a4b;
  --accent-soft: rgba(201, 154, 75, 0.4);
  --hair: rgba(243, 239, 230, 0.1);
  --hair-strong: rgba(243, 239, 230, 0.22);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --d-fast: .22s;
  --d: .5s;
  --d-slow: .9s;

  --font-display: 'Fraunces Variable', ui-serif, Georgia, serif;
  --font-mono: 'Space Grotesk Variable', ui-sans-serif, system-ui, sans-serif;
  --font-ed: 'Newsreader Italic Variable', ui-serif, Georgia, serif;
}

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

html {
  background: var(--bg);
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  opacity: 0;
  animation: page-in .6s var(--ease) .05s forwards;
}

@keyframes page-in {
  to { opacity: 1; }
}

/* ambient wash — pure gradient, no image/filter layer to keep scroll paint cheap and safe */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse 70% 50% at 50% -10%, rgba(201,154,75,.07), transparent 60%),
              radial-gradient(ellipse 60% 40% at 100% 100%, rgba(201,154,75,.04), transparent 60%);
  pointer-events: none;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent-soft); color: var(--ink); }

:focus { outline: none; }
:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
  border-radius: 1px;
}

/* skip link */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--ink);
  color: var(--bg);
  padding: .6rem 1rem;
  font-size: .8rem;
  letter-spacing: .04em;
  z-index: 100;
  transition: top var(--d-fast) var(--ease);
}
.skip-link:focus { top: 1rem; }

/* scroll progress */
.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  z-index: 60;
  pointer-events: none;
}
.progress #progressFill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), rgba(201,154,75,.35));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* room-watch wayfinder */
.roomwatch {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 50;
  display: flex;
  align-items: baseline;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-dim);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--d) var(--ease), transform var(--d) var(--ease);
  pointer-events: none;
}
.roomwatch.is-visible { opacity: .75; transform: translateY(0); }
.roomwatch__num {
  color: var(--accent);
  font-variation-settings: 'wght' 560;
}

/* ============ hero ============ */
.hero {
  max-width: 60rem;
  margin: 0 auto;
  padding: clamp(4.5rem, 12vh, 8rem) 1.75rem clamp(3rem, 8vh, 5rem);
  text-align: left;
}

.kicker {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  font-variation-settings: 'wght' 500;
}

.title {
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-weight: 380;
  font-variation-settings: 'opsz' 144, 'SOFT' 0, 'WONK' 0;
  font-size: clamp(3.4rem, 11vw, 6.2rem);
  line-height: .96;
  letter-spacing: -.015em;
  color: var(--ink);
}

.intro {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-family: var(--font-ed);
  font-style: italic;
  font-weight: 380;
  font-variation-settings: 'opsz' 20;
  font-size: clamp(1.1rem, 2.1vw, 1.35rem);
  line-height: 1.5;
  color: var(--ink-dim);
}

.hero__meta {
  margin: 0;
  display: flex;
  gap: .6rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.hero__meta .dot { color: var(--accent); }

/* ============ rooms list ============ */
main { max-width: 60rem; margin: 0 auto; padding: 0 1.75rem; }

.rooms {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.rooms li { border-bottom: 1px solid var(--hair); }

.room {
  position: relative;
  display: grid;
  grid-template-columns: 3rem 1fr 5.5rem 1.5rem;
  align-items: center;
  column-gap: 1.5rem;
  padding: 1.7rem 0;
  isolation: isolate;
  transition: background-color var(--d) var(--ease), padding var(--d-slow) var(--ease);
}

.room::before {
  /* hover wash */
  content: '';
  position: absolute;
  inset: 0 -1.75rem;
  background: linear-gradient(90deg, rgba(243,239,230,.035), transparent 70%);
  opacity: 0;
  transition: opacity var(--d) var(--ease);
  z-index: -1;
}
.room:hover::before, .room:focus-visible::before { opacity: 1; }

.room__index {
  font-family: var(--font-mono);
  font-size: .82rem;
  font-variation-settings: 'wght' 400;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  transition: color var(--d) var(--ease);
}
.room:hover .room__index, .room:focus-visible .room__index { color: var(--accent); }

.room__body {
  display: flex;
  flex-direction: column;
  gap: .38rem;
  min-width: 0;
}

.room__name {
  font-family: var(--font-display);
  font-weight: 340;
  font-variation-settings: 'opsz' 40, 'SOFT' 0, 'WONK' 0;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: font-variation-settings var(--d) var(--ease), letter-spacing var(--d) var(--ease), color var(--d) var(--ease);
}

.room__desc {
  font-family: var(--font-ed);
  font-style: italic;
  font-variation-settings: 'opsz' 14;
  font-size: .95rem;
  line-height: 1.4;
  color: var(--ink-dim);
  max-width: 34rem;
  opacity: .82;
  transition: opacity var(--d) var(--ease), color var(--d) var(--ease);
}
.room:hover .room__desc, .room:focus-visible .room__desc { opacity: 1; color: var(--ink); }

.room__thumb {
  width: 5.5rem;
  height: 3.6rem;
  background-color: var(--bg-1);
  background-size: cover;
  background-position: center;
  filter: grayscale(.55) sepia(.12) brightness(.72) contrast(1.05);
  clip-path: inset(0 100% 0 0);
  transition: clip-path var(--d-slow) var(--ease), filter var(--d-slow) var(--ease), transform var(--d-slow) var(--ease);
  transform: scale(1.06);
}
.room:hover .room__thumb, .room:focus-visible .room__thumb {
  clip-path: inset(0 0 0 0);
  filter: grayscale(.15) sepia(.08) brightness(.88) contrast(1.05);
  transform: scale(1);
}

.room__arrow {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--ink-faint);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--d) var(--ease), transform var(--d) var(--ease), color var(--d) var(--ease);
  justify-self: end;
}
.room:hover .room__arrow, .room:focus-visible .room__arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent);
}

/* ===== 01 Approach — resolves from blur ===== */
.room[data-effect="approach"] .room__name,
.room[data-effect="approach"] .room__desc {
  filter: blur(3px);
  transition: filter var(--d-slow) var(--ease), opacity var(--d) var(--ease), color var(--d) var(--ease);
}
.room[data-effect="approach"]:hover .room__name,
.room[data-effect="approach"]:hover .room__desc,
.room[data-effect="approach"]:focus-visible .room__name,
.room[data-effect="approach"]:focus-visible .room__desc {
  filter: blur(0);
}
.room[data-effect="approach"] .room__thumb { filter: grayscale(.6) blur(4px) brightness(.65); }
.room[data-effect="approach"]:hover .room__thumb,
.room[data-effect="approach"]:focus-visible .room__thumb { filter: grayscale(.15) blur(0) brightness(.88); }

/* ===== 02 Breath — variable type breathing ===== */
.room[data-effect="breath"] .room__name {
  animation: breathe 3.6s ease-in-out infinite;
  animation-play-state: paused;
}
.room[data-effect="breath"]:hover .room__name,
.room[data-effect="breath"]:focus-visible .room__name {
  animation-play-state: running;
}
@keyframes breathe {
  0%, 100% { font-variation-settings: 'opsz' 40, 'SOFT' 0, 'WONK' 0; letter-spacing: -.01em; }
  50% { font-variation-settings: 'opsz' 68, 'SOFT' 35, 'WONK' 0; letter-spacing: .005em; }
}

/* ===== 03 Grain — texture fades over the row ===== */
.room[data-effect="grain"] { position: relative; }
.room[data-effect="grain"]::after {
  content: '';
  position: absolute;
  inset: 0 -1.75rem;
  z-index: -1;
  opacity: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  transition: opacity var(--d) var(--ease);
}
.room[data-effect="grain"]:hover::after,
.room[data-effect="grain"]:focus-visible::after { opacity: .5; }

/* ===== 04 Dust — particles settle ===== */
.room[data-effect="dust"] .room__name .char {
  display: inline-block;
  transition: transform .6s var(--ease), opacity .6s var(--ease), filter .6s var(--ease);
  transition-delay: calc(var(--i, 0) * 13ms);
}
/* scatter along each character's own JS-assigned --dx/--dy, staggered by --i */
.room[data-effect="dust"]:hover .room__name .char,
.room[data-effect="dust"]:focus-visible .room__name .char {
  transform: translate(var(--dx, 0), var(--dy, -3px));
  opacity: .75;
  filter: blur(.4px);
}

/* ===== 05 Depth — parallax thumbnail =====
   overrides the base thumb's slow reveal transition for transform only —
   the reveal (clip-path/filter) should stay slow, but cursor-tracked
   parallax must be quick or it lags and rubber-bands behind the pointer. */
.room[data-effect="depth"] .room__thumb {
  will-change: transform;
  transition: clip-path var(--d-slow) var(--ease), filter var(--d-slow) var(--ease), transform 150ms ease-out;
}

/* ===== 06 Torch — cursor is the light ===== */
.room[data-effect="torch"] { position: relative; overflow: hidden; }
.room[data-effect="torch"]::after {
  content: '';
  position: absolute;
  inset: 0 -1.75rem;
  z-index: -1;
  background: radial-gradient(180px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 226, 170, .16), transparent 62%);
  opacity: 0;
  transition: opacity var(--d) var(--ease);
}
.room[data-effect="torch"]:hover::after,
.room[data-effect="torch"]:focus-visible::after { opacity: 1; }
.room[data-effect="torch"] .room__name,
.room[data-effect="torch"] .room__index { transition: color var(--d) var(--ease), opacity var(--d) var(--ease); }

/* ===== 07 Pulse — waveform underline ===== */
.room__wave {
  grid-column: 2 / 3;
  grid-row: 2;
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 12px;
  margin-top: -.2rem;
}
.room[data-effect="pulse"] { grid-template-rows: auto auto; row-gap: .3rem; }
.room__wave i {
  display: block;
  width: 2px;
  height: 4px;
  background: var(--ink-faint);
  transition: height var(--d-fast) var(--ease), background var(--d) var(--ease);
}
.room[data-effect="pulse"]:hover .room__wave i,
.room[data-effect="pulse"]:focus-visible .room__wave i {
  background: var(--accent);
  animation: wave 900ms ease-in-out infinite;
}
.room__wave i:nth-child(1) { animation-delay: 0ms; }
.room__wave i:nth-child(2) { animation-delay: 90ms; }
.room__wave i:nth-child(3) { animation-delay: 180ms; }
.room__wave i:nth-child(4) { animation-delay: 270ms; }
.room__wave i:nth-child(5) { animation-delay: 360ms; }
@keyframes wave {
  0%, 100% { height: 4px; }
  50% { height: 13px; }
}

/* ===== 08 Letterform — grown, not set ===== */
.room[data-effect="letterform"] .room__name {
  transition: font-variation-settings var(--d-slow) var(--ease), letter-spacing var(--d-slow) var(--ease), color var(--d) var(--ease);
}
.room[data-effect="letterform"]:hover .room__name,
.room[data-effect="letterform"]:focus-visible .room__name {
  font-variation-settings: 'opsz' 144, 'SOFT' 100, 'WONK' 1;
  letter-spacing: .01em;
}

/* ===== 09 Sequence — counter flips ===== */
.room[data-effect="sequence"] .room__index {
  font-variant-numeric: tabular-nums;
}

/* ===== 10 Object — restraint control-case ===== */
.room--object {
  padding-block: 4.75rem;
  grid-template-columns: 3rem 1fr 1.5rem;
}
.room--object::before { background: none; }
.room--object {
  transition: box-shadow var(--d) var(--ease), padding var(--d) var(--ease);
  box-shadow: inset 0 0 0 0 var(--hair-strong);
}
.room--object:hover, .room--object:focus-visible {
  box-shadow: inset 0 0 0 1px var(--hair-strong);
}
.room--object .room__name { font-weight: 300; }

/* ===== 11 Country — interpretive map draws in ===== */
.room__map {
  width: 5.5rem;
  height: 2rem;
  overflow: visible;
}
.room[data-effect="country"] .room__thumb { display: none; }
.room[data-effect="country"] { grid-template-columns: 3rem 1fr 5.5rem 1.5rem; }
.room__map-path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  stroke-linecap: round;
  stroke-dasharray: 160;
  stroke-dashoffset: 160;
  opacity: .8;
  transition: stroke-dashoffset .9s var(--ease);
}
.room__map-pin {
  fill: var(--accent);
  opacity: 0;
  transition: opacity var(--d) var(--ease) .5s;
}
.room[data-effect="country"]:hover .room__map-path,
.room[data-effect="country"]:focus-visible .room__map-path { stroke-dashoffset: 0; }
.room[data-effect="country"]:hover .room__map-pin,
.room[data-effect="country"]:focus-visible .room__map-pin { opacity: 1; }

/* ===== 12 Voices — equalizer ===== */
.room__eq {
  grid-column: 2 / 3;
  grid-row: 2;
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 12px;
  margin-top: -.2rem;
}
.room[data-effect="voices"] { grid-template-rows: auto auto; row-gap: .3rem; }
.room__eq i {
  display: block;
  width: 2px;
  background: var(--ink-faint);
  height: 3px;
  transition: background var(--d) var(--ease);
}
.room[data-effect="voices"]:hover .room__eq i,
.room[data-effect="voices"]:focus-visible .room__eq i {
  background: var(--accent);
  animation: eq 760ms ease-in-out infinite;
}
.room__eq i:nth-child(1) { animation-delay: 20ms; height: 5px; }
.room__eq i:nth-child(2) { animation-delay: 140ms; height: 9px; }
.room__eq i:nth-child(3) { animation-delay: 60ms; height: 4px; }
.room__eq i:nth-child(4) { animation-delay: 220ms; height: 11px; }
.room__eq i:nth-child(5) { animation-delay: 100ms; height: 6px; }
.room__eq i:nth-child(6) { animation-delay: 180ms; height: 8px; }
@keyframes eq {
  0%, 100% { height: 3px; }
  50% { height: 13px; }
}

/* ============ footer ============ */
.colophon {
  max-width: 60rem;
  margin: 0 auto;
  padding: clamp(3rem, 8vh, 5rem) 1.75rem clamp(3.5rem, 9vh, 6rem);
}
.colophon p {
  margin: 0;
  font-family: var(--font-ed);
  font-style: italic;
  font-variation-settings: 'opsz' 14;
  font-size: .88rem;
  line-height: 1.6;
  color: var(--ink-dim);
  max-width: 34rem;
}

/* ============ responsive ============ */
@media (max-width: 720px) {
  .room {
    grid-template-columns: 2.4rem 1fr;
    row-gap: .5rem;
    padding: 1.35rem 0;
  }
  .room__thumb, .room__map, .room__arrow { display: none; }
  .room--object { grid-template-columns: 2.4rem 1fr; padding-block: 3.4rem; }
  .room[data-effect="pulse"] .room__wave,
  .room[data-effect="voices"] .room__eq { grid-column: 2 / 3; }
  .roomwatch { right: 1rem; bottom: 1rem; font-size: .66rem; }
}

@media (max-width: 420px) {
  .hero { padding-left: 1.25rem; padding-right: 1.25rem; }
  main { padding-left: 1.25rem; padding-right: 1.25rem; }
  .colophon { padding-left: 1.25rem; padding-right: 1.25rem; }
}

/* ============ reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  body { opacity: 1; animation: none; }
  .room__thumb { clip-path: inset(0 0 0 0); filter: grayscale(.3) brightness(.82); transform: none; }
  .room[data-effect="approach"] .room__name,
  .room[data-effect="approach"] .room__desc,
  .room[data-effect="approach"] .room__thumb { filter: none; }
}