/* ==========================================================
   Gallery — curved tile wall, viewer and project stack
   ========================================================== */

/* the glowing edges breathe by fading their own opacity only, which the GPU does on its
   own (animating a shared custom property made the browser restyle the whole gallery
   every frame). A soft wave, drawn in small steps: smooth to the eye, far less drawing. */
@keyframes breath {
  0% { opacity: 0.550; }
  12.5% { opacity: 0.616; }
  25% { opacity: 0.775; }
  37.5% { opacity: 0.934; }
  50% { opacity: 1.000; }
  62.5% { opacity: 0.934; }
  75% { opacity: 0.775; }
  87.5% { opacity: 0.616; }
  100% { opacity: 0.550; }
}
@keyframes edge-breath {
  0% { opacity: 0.650; }
  12.5% { opacity: 0.687; }
  25% { opacity: 0.775; }
  37.5% { opacity: 0.863; }
  50% { opacity: 0.900; }
  62.5% { opacity: 0.863; }
  75% { opacity: 0.775; }
  87.5% { opacity: 0.687; }
  100% { opacity: 0.650; }
}
@keyframes panel-breath {
  0% { opacity: 0.710; }
  12.5% { opacity: 0.752; }
  25% { opacity: 0.855; }
  37.5% { opacity: 0.958; }
  50% { opacity: 1.000; }
  62.5% { opacity: 0.958; }
  75% { opacity: 0.855; }
  87.5% { opacity: 0.752; }
  100% { opacity: 0.710; }
}

html.g-lock { overflow: hidden; }
/* nothing underneath an open layer needs to keep animating */
html.g-lock main *,
html.g-lock main *::before,
html.g-lock main *::after,
.gallery.is-covered *,
.gallery.is-covered *::before,
.gallery.is-covered *::after { animation-play-state: paused !important; }

.gallery[hidden],
.project[hidden],
.viewer[hidden],
.player[hidden] { display: none; }

/* placeholder surface for blank tiles, lit from the middle */
.gallery,
.project,
.viewer {
  --blank: radial-gradient(90% 85% at 50% 42%, #b9bbbf 0%, #9c9fa4 55%, #7c7f85 100%);
}

/* ---------- gallery shell ---------- */

.gallery {
  --glow: var(--white);
  --ox: 50%;
  --oy: 50%;
  position: fixed;
  inset: 0;
  z-index: 60;
  overflow: hidden;
  color: var(--text);
  background:
    radial-gradient(38% 46% at var(--cx, 62%) var(--cy, 50%), color-mix(in srgb, var(--glow) 7%, transparent), transparent 72%),
    #000;
  touch-action: none;
  outline: none;
  clip-path: circle(0px at var(--ox) var(--oy));
  transition: clip-path 1s cubic-bezier(0.7, 0, 0.2, 1);
}
.gallery.is-open { clip-path: circle(150vmax at var(--ox) var(--oy)); }

/* breathing light around the screen edge */
.g-edge {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--glow) 22%, transparent),
    inset 0 0 110px -30px color-mix(in srgb, var(--glow) 60%, transparent);
  animation: edge-breath 3.8s steps(5) infinite;
  will-change: opacity;
}

/* ---------- the curved wall ---------- */

.g-stage {
  position: absolute;
  inset: 0;
  z-index: 1;
  perspective: 1100px;
  perspective-origin: var(--cx, 62%) var(--cy, 50%);
}

.g-world {
  position: absolute;
  inset: 0;
  transition: opacity 0.35s ease, filter 0.35s ease;
}
.g-world.is-leaving { opacity: 0; filter: blur(10px); }

.tile {
  position: absolute;
  left: calc(var(--cx) - var(--tw) / 2);
  top: calc(var(--cy) - var(--th) / 2);
  width: var(--tw);
  height: var(--th);
  border-radius: 14px;
  cursor: pointer;
  will-change: transform;
  backface-visibility: hidden;
}

.tile-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  background: var(--blank);
}
.tile-media img,
.tile-media video {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
}
/* the video fades in over the still once it's playing */
.tile-media img + video { opacity: 0; transition: opacity 0.35s ease; }
.tile.is-playing .tile-media img + video { opacity: 1; }

/* darkness grows with distance from the focused tile; lit from its side */
.tile-shade {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(130% 120% at var(--sx, 50%) var(--sy, 50%), rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.94) 78%);
  opacity: 1;
}

/* thin glass rim on every tile */
.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  pointer-events: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* the breathing glow on the focused tile: script.js fades .tile-glow with distance,
   and its ::after breathes */
.tile-glow {
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
}
.tile-glow::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow:
    0 0 0 1.5px rgba(255, 255, 255, 0.85),
    inset 0 0 18px rgba(255, 255, 255, 0.35),
    0 0 22px 3px color-mix(in srgb, var(--glow) 55%, #fff),
    0 0 70px 10px color-mix(in srgb, var(--glow) 40%, transparent);
  opacity: 0.55;
}
.tile.is-focus .tile-glow::after { animation: breath 3.8s steps(5) infinite; will-change: opacity; }
.tile.is-focus:hover .tile-glow::after { animation: none; opacity: 1; }


/* keeps the title readable over tiles passing underneath */
.g-shade {
  position: absolute;
  inset: 0 auto 0 0;
  z-index: 3;
  width: 46vw;
  pointer-events: none;
  background: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.9) 42%, transparent 100%);
}

/* ---------- header, info, hint ---------- */

.g-header {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(20px, 3.4vw, 46px) var(--gutter);
  pointer-events: none;
}
.g-header > * { pointer-events: auto; }

.g-close,
.viewer-close {
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1.5px solid var(--text);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: box-shadow 0.4s;
}
.g-close::before,
.g-close::after,
.viewer-close::before,
.viewer-close::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--text);
  transform: translate(-50%, -50%) rotate(45deg);
}
.g-close::after,
.viewer-close::after { transform: translate(-50%, -50%) rotate(-45deg); }
.g-close:hover,
.g-close:focus-visible,
.viewer-close:hover,
.viewer-close:focus-visible {
  outline: none;
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.45), 0 0 34px color-mix(in srgb, var(--glow) 50%, transparent);
}

.g-info {
  position: absolute;
  left: var(--gutter);
  top: 50%;
  z-index: 4;
  max-width: 30vw;
  transform: translateY(-50%);
  transition: opacity 0.35s ease, transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.g-info.is-leaving { opacity: 0; transform: translateY(calc(-50% + 14px)); }

.g-eyebrow {
  margin: 0;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--glow) 75%, #fff);
}
.g-title {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(30px, 3.3vw, 60px);
  letter-spacing: 0.005em;
  line-height: 1.1;
}
.g-count {
  margin: 28px 0 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}
.g-count b { font-weight: 500; color: var(--text); }
.g-details.is-in > * { animation: detail-in 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
.g-details.is-in > :nth-child(2) { animation-delay: 0.05s; }
.g-details.is-in > :nth-child(3) { animation-delay: 0.1s; }
.g-details.is-in > :nth-child(4) { animation-delay: 0.15s; }
@keyframes detail-in { from { opacity: 0; transform: translateY(8px); } }

.g-item-title {
  min-height: 1.3em;
  margin: 30px 0 0;
  font-size: clamp(18px, 1.5vw, 24px);
  font-weight: 500;
  line-height: 1.3;
  color: var(--text);
}
.g-desc {
  max-width: 34ch;
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(242, 243, 245, 0.68);
  white-space: pre-line;
}
.g-agency {
  margin: 14px 0 0;
  font-size: 15px;
  color: rgba(242, 243, 245, 0.68);
}
.g-agency span { color: var(--text); }
.g-tools { margin-top: 34px; }
.g-tools-label {
  margin: 0 0 10px;
  font-size: 12px;
  color: rgba(242, 243, 245, 0.75);
}
.g-tool-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.g-tool {
  position: relative;
  width: 36px;
  height: 36px;
  outline: none;
  cursor: default;
}
.g-tool img {
  display: block;
  width: 100%;
  height: 100%;
  transition: filter 0.35s ease, transform 0.35s ease;
}
.g-tool:hover img,
.g-tool:focus-visible img {
  transform: translateY(-2px);
  filter:
    drop-shadow(0 0 4px color-mix(in srgb, var(--tool) 90%, transparent))
    drop-shadow(0 0 14px color-mix(in srgb, var(--tool) 70%, transparent));
}
/* name tag below the icon */
.g-tool-tag {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  translate: -50% -4px;
  padding: 4px 9px;
  border-radius: 6px;
  white-space: nowrap;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: #fff;
  background: rgba(10, 12, 16, 0.9);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--tool) 55%, transparent), 0 0 16px -4px var(--tool);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, translate 0.25s ease;
}
.g-tool:hover .g-tool-tag,
.g-tool:focus-visible .g-tool-tag { opacity: 1; translate: -50% 0; }

.g-hint {
  position: absolute;
  left: calc(var(--gutter) + 230px);
  bottom: calc(clamp(24px, 6.5vh, 64px) + 19px);
  z-index: 6;
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(242, 243, 245, 0.38);
}
.g-hint-touch { display: none; }
@media (hover: none) {
  .g-hint-mouse { display: none; }
  .g-hint-touch { display: inline; }
}

/* ---------- arrow zones: hover to move ---------- */

.g-zone {
  position: absolute;
  z-index: 6;
  padding: 0;
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
  outline: none;
}
.g-zone[disabled] { pointer-events: none; }

/* soft light that gathers under the arrow while hovering */
.g-zone::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}
.g-zone--up::before { background: radial-gradient(50% 60% at 50% 100%, color-mix(in srgb, var(--glow) 20%, transparent), transparent 70%); }
.g-zone--down::before { background: radial-gradient(50% 60% at 50% 0%, color-mix(in srgb, var(--glow) 20%, transparent), transparent 70%); }
.g-zone--right::before { background: radial-gradient(45% 55% at 0% 50%, color-mix(in srgb, var(--glow) 22%, transparent), transparent 70%); }
.g-zone--left::before { background: radial-gradient(60% 55% at 100% 50%, color-mix(in srgb, var(--glow) 22%, transparent), transparent 70%); }
.g-zone:hover::before,
.g-zone.is-armed::before,
.g-zone:focus-visible::before { opacity: 1; }

.g-chev {
  position: absolute;
  width: clamp(34px, 3.4vw, 52px);
  fill: none;
  stroke: #fff;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.55));
  transition: opacity 0.45s ease, filter 0.45s ease, translate 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), scale 0.45s ease;
}
.g-zone--up .g-chev { left: 50%; bottom: 26px; margin-left: calc(clamp(34px, 3.4vw, 52px) / -2); rotate: 180deg; }
.g-zone--down .g-chev { left: 50%; top: 26px; margin-left: calc(clamp(34px, 3.4vw, 52px) / -2); }
.g-zone--right .g-chev { left: clamp(20px, 3vw, 48px); top: 50%; margin-top: -11px; rotate: -90deg; }
.g-zone--left .g-chev { right: 18px; top: 50%; margin-top: -11px; rotate: 90deg; }
.g-zone[disabled] .g-chev { opacity: 0; scale: 0.7; }

.g-zone:hover .g-chev,
.g-zone:focus-visible .g-chev,
.g-zone.is-armed .g-chev {
  filter:
    drop-shadow(0 0 6px #fff)
    drop-shadow(0 0 18px color-mix(in srgb, var(--glow) 80%, #fff));
}
.g-zone--up.is-armed .g-chev { animation: nudge-y 0.95s ease-in-out infinite; --n: -7px; }
.g-zone--down.is-armed .g-chev { animation: nudge-y 0.95s ease-in-out infinite; --n: 7px; }
.g-zone--right.is-armed .g-chev { animation: nudge-x 0.95s ease-in-out infinite; --n: 7px; }
.g-zone--left.is-armed .g-chev { animation: nudge-x 0.95s ease-in-out infinite; --n: -7px; }
@keyframes nudge-y { 50% { translate: 0 var(--n); } }
@keyframes nudge-x { 50% { translate: var(--n) 0; } }

/* ---------- transport: switch category ---------- */

.g-transport {
  position: absolute;
  left: calc(var(--gutter) - 12px);
  bottom: clamp(24px, 6.5vh, 64px);
  z-index: 7;
  display: flex;
  gap: 6px;
}
.g-tbtn {
  --console-h: 58px;
  position: relative;
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
  opacity: 0.55;
  transition: opacity 0.35s ease, transform 0.25s ease;
}
.g-tbtn .icon { filter: drop-shadow(0 0 4px color-mix(in srgb, var(--glow) 70%, transparent)); }
.g-tbtn:hover,
.g-tbtn:focus-visible { opacity: 1; outline: none; }
.g-tbtn:active { transform: scale(0.92); }
.g-tbtn[aria-current="true"] { opacity: 1; }
.g-tbtn[aria-current="true"] .icon {
  filter:
    drop-shadow(0 0 6px color-mix(in srgb, var(--glow) 95%, transparent))
    drop-shadow(0 0 18px color-mix(in srgb, var(--glow) 70%, transparent));
}
.g-tbtn[aria-current="true"]::after {
  content: "";
  position: absolute;
  left: 30%;
  right: 30%;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--glow);
  box-shadow: 0 0 10px var(--glow);
}
.g-tlabel {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  translate: -50% 4px;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(10, 12, 16, 0.85);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, translate 0.25s ease;
}
.g-tbtn:hover .g-tlabel,
.g-tbtn:focus-visible .g-tlabel {
  opacity: 1;
  translate: -50% 0;
  text-shadow: 0 0 10px color-mix(in srgb, var(--glow) 80%, transparent);
}

/* ---------- viewer (semi-fullscreen) ---------- */

.viewer {
  --glow: var(--white);
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  outline: none;
}
.viewer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px) brightness(0.55);
  -webkit-backdrop-filter: blur(10px) brightness(0.55);
  opacity: 0;
  transition: opacity 0.5s ease;
}
.viewer.is-open .viewer-backdrop { opacity: 1; }

.viewer-panel {
  position: relative;
  border-radius: 22px;
  transform-origin: 50% 50%;
  transition:
    transform 0.65s cubic-bezier(0.2, 0.85, 0.2, 1),
    opacity 0.45s ease,
    width 0.5s cubic-bezier(0.2, 0.85, 0.2, 1),
    height 0.5s cubic-bezier(0.2, 0.85, 0.2, 1);
}
.viewer-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow:
    0 0 0 1.5px rgba(255, 255, 255, 0.8),
    0 0 30px 4px color-mix(in srgb, var(--glow) 40%, #fff),
    0 0 90px 8px color-mix(in srgb, var(--glow) 22%, transparent);
  animation: panel-breath 3.8s steps(5) infinite;
  will-change: opacity;
}
.viewer-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  background: var(--blank);
}
.viewer-media img,
.viewer-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}
.viewer-close {
  position: absolute;
  top: clamp(16px, 3vw, 40px);
  right: var(--gutter);
  z-index: 2;
  opacity: 0;
  transition: opacity 0.4s ease 0.2s, box-shadow 0.4s;
}
.viewer.is-open .viewer-close { opacity: 1; }

/* ---------- video player ---------- */

.player {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 24px);
  padding: 60px 8% 7%;
  border-radius: 0 0 22px 22px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.35));
  transition: opacity 0.5s ease;
}
.player.is-idle { opacity: 0; }

.pl-play,
.pl-mute {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
}
.pl-play svg { width: 34px; fill: currentColor; filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.6)); }
.pl-mute svg { width: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.pl-mute .pl-speaker { fill: currentColor; }
.pl-icon-pause,
.player.is-playing .pl-icon-play,
.pl-mute .pl-x,
.player.is-muted .pl-waves { display: none; }
.player.is-playing .pl-icon-pause,
.player.is-muted .pl-x { display: block; }
.pl-play:hover svg,
.pl-play:focus-visible svg,
.pl-mute:hover svg { filter: drop-shadow(0 0 8px #fff) drop-shadow(0 0 16px var(--glow)); }
.pl-play:focus-visible,
.pl-mute:focus-visible { outline: none; }

.pl-bar {
  --p: 0%;
  position: relative;
  flex: 0 1 min(560px, 56%);
  height: 24px;
  cursor: pointer;
  touch-action: none;
  outline: none;
}
.pl-bar::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: rgba(255, 255, 255, 0.9);
}
.pl-fill {
  position: absolute;
  left: 0;
  top: 50%;
  width: var(--p);
  height: 4px;
  margin-top: -2px;
  border-radius: 2px;
  background: var(--red);
  box-shadow: 0 0 10px var(--red);
}
.pl-knob {
  position: absolute;
  left: var(--p);
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  translate: -50% -50%;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  transition: scale 0.2s;
}
.pl-bar:hover .pl-knob,
.pl-bar:focus-visible .pl-knob { scale: 1.25; }
.pl-time {
  flex: none;
  min-width: 84px;
  font-size: 11px;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- project stack ---------- */

.project {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: #000;
  opacity: 0;
  outline: none;
  transition: opacity 0.45s ease;
}
.project.is-open { opacity: 1; }

.project-scroll {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 6vh 4vw 8vh 11vw;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
}
.project-scroll::-webkit-scrollbar { display: none; }

.project-card {
  --k: 0;
  --a: 1.6; /* the file's width / height (script.js) */
  position: relative;
  flex: none;
  align-self: center;
  width: min(100%, calc(84vh * var(--a)));
  aspect-ratio: var(--a);
  border-radius: 22px;
  overflow: hidden;
  scroll-snap-align: center;
  cursor: zoom-in;
  background: var(--blank);
  opacity: 0;
  transform: translateY(60px);
  transition:
    opacity 0.7s ease calc(var(--k) * 90ms + 0.1s),
    transform 0.8s cubic-bezier(0.2, 0.85, 0.2, 1) calc(var(--k) * 90ms + 0.1s),
    box-shadow 0.4s;
}
.project.is-open .project-card { opacity: 1; transform: none; }
.project-card img,
.project-card video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
/* vignette */
.project-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(70% 70% at 50% 42%, transparent 50%, rgba(0, 0, 0, 0.72) 100%);
}
.project-card:hover {
  box-shadow:
    0 0 0 1.5px rgba(255, 255, 255, 0.7),
    0 0 40px 4px color-mix(in srgb, var(--white) 25%, transparent);
}
.project-name {
  position: absolute;
  left: 5%;
  bottom: 7%;
  z-index: 2;
  margin: 0;
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(32px, 4.4vw, 72px);
  line-height: 1.05;
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.4);
}

.project-back {
  position: absolute;
  left: clamp(8px, 3vw, 44px);
  top: 50%;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 64px;
  height: 120px;
  margin-top: -60px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  outline: none;
}
.project-back svg {
  width: 22px;
  fill: none;
  stroke: rgba(255, 255, 255, 0.8);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.4));
  transition: filter 0.4s, translate 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.project-back:hover svg,
.project-back:focus-visible svg {
  stroke: #fff;
  translate: -5px 0;
  filter: drop-shadow(0 0 6px #fff) drop-shadow(0 0 16px rgba(255, 255, 255, 0.6));
}

/* ---------- small screens ---------- */

@media (max-width: 760px) {
  .g-info {
    top: 86px;
    left: 20px;
    max-width: calc(100% - 40px);
    transform: none;
  }
  .g-info.is-leaving { transform: translateY(12px); }
  .g-title { margin-top: 8px; font-size: 26px; }
  .g-item-title { margin-top: 10px; font-size: 16px; }
  .g-desc,
  .g-agency,
  .g-tools { display: none; }
  .g-count { margin-top: 10px; }
  .g-shade { display: none; }
  .g-hint { display: none; }
  .g-transport {
    left: 50%;
    bottom: 18px;
    translate: -50% 0;
  }
  .g-zone--right .g-chev { left: 12px; }
  .g-zone--left .g-chev { right: 8px; }
  .viewer-panel,
  .viewer-panel::before,
  .viewer-media { border-radius: 14px; }
  .player { padding: 40px 5% 5%; gap: 8px; }
  .pl-time { display: none; }
  .project-scroll { padding: 80px 14px 10vh 52px; gap: 14px; }
  .project-card { width: min(100%, calc(70vh * var(--a))); border-radius: 14px; }
  .project-back { left: 0; width: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  .g-edge,
  .tile-glow::after,
  .viewer-panel::before { animation: none; }
  .gallery { transition: none; }
}