/* Buttons, toggle, filter chips, gallery cards, lightbox */

/* Light/Dark side toggle (tech spec §22) */
.side-toggle {
  display: inline-flex;
  border-radius: var(--radius-pill);
  border: 1px solid var(--card-border);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.4);
}

:root[data-theme="dark"] .side-toggle {
  border-color: rgba(160, 160, 160, 0.5);
}

.side-toggle__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 1rem 2.1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 1.3rem;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.side-toggle__btn svg { width: 21px; height: 21px; fill: currentColor; }

.side-toggle__btn.is-active {
  background: var(--button-bg);
  color: var(--button-text-active, var(--text-main));
  font-weight: 600;
  box-shadow: 0 0 14px var(--accent-glow), 0 0 34px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

:root[data-theme="dark"] .side-toggle__btn:not(.is-active) {
  box-shadow: inset 0 0 0 1px rgba(160, 160, 160, 0.5);
}

:root[data-theme="dark"] .chip:not(.is-active) {
  border-color: rgba(160, 160, 160, 0.5);
}

/* Filter chips */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 0.75rem;
  margin: clamp(3rem, 7vw, 4.5rem) 0 clamp(1rem, 3vw, 1.5rem);
}

.chip {
  position: relative;
  padding: 0.8rem 1.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 1.2rem;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.chip::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -14px;
  width: 0;
  height: 26px;
  transform: translateX(-50%);
  transition: width var(--transition-fast);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

:root[data-theme="light"] .chip::after {
  background-image: url("../images/ui/decor/divider-spark-light.webp");
  background-size: 200% auto;
  filter: brightness(1.4) drop-shadow(0 0 8px rgba(241, 197, 111, 0.85));
}

:root[data-theme="dark"] .chip::after {
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-strong), transparent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.chip.is-active::after {
  width: 110px;
}

.filters:hover .chip.is-active:not(:hover)::after {
  width: 0;
}

.chip:hover::after {
  width: 110px;
}

.chip:hover {
  color: var(--text-main);
}

.chip.is-active {
  background: var(--button-bg);
  color: var(--button-text-active, var(--text-main));
  font-weight: 600;
  box-shadow: 0 0 12px var(--accent-glow), 0 0 28px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  border-color: transparent;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

/* Gallery grid — 3 large cards per row on desktop */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
}

@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .gallery-grid { grid-template-columns: 1fr; }
}

.gallery-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  border: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.32);
  aspect-ratio: 4 / 5;
  cursor: pointer;
  transition: transform 260ms ease, box-shadow 260ms ease, border-color 260ms ease;
  isolation: isolate;
}

.gallery-card img,
.gallery-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 450ms ease, filter 450ms ease;
}

/* Shine-sweep highlight (Light hover) */
.gallery-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(115deg, transparent 40%, rgba(255, 231, 168, 0.55) 50%, transparent 60%);
  transform: translateX(-120%);
  pointer-events: none;
  opacity: 0;
}

:root[data-theme="light"] .gallery-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-strong);
  box-shadow: 0 0 20px var(--accent-glow), 0 0 55px var(--accent-glow), 0 0 90px rgba(244, 190, 94, 0.3);
}

:root[data-theme="light"] .gallery-card:hover::after,
:root[data-theme="light"] .gallery-card.shine-play::after {
  opacity: 1;
  animation: shine-sweep 1100ms ease;
}

@keyframes shine-sweep {
  from { transform: translateX(-120%); }
  to   { transform: translateX(120%); }
}

/* Dark hover: red glow + glowing border */
:root[data-theme="dark"] .gallery-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-strong);
  box-shadow: 0 0 20px var(--accent-glow), 0 0 55px var(--accent-glow), 0 0 90px rgba(178, 58, 63, 0.35);
}

.gallery-card:hover img,
.gallery-card:hover video {
  transform: scale(1.1);
  filter: contrast(1.08) brightness(1.06);
}

.gallery-card__play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  pointer-events: none;
}

.gallery-card__play svg {
  width: 46px;
  height: 46px;
  fill: rgba(255, 255, 255, 0.85);
  filter: drop-shadow(0 0 10px rgba(0,0,0,0.6));
}

.gallery-card__badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 3;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-caps);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  background: var(--button-bg);
  box-shadow: 0 0 14px var(--accent-glow);
}

.gallery-card__like {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-pill);
  border: none;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  color: var(--text-main);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.gallery-card__like:hover { transform: scale(1.08); }

.gallery-card__like svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--text-main);
  stroke-width: 1.8;
  transition: fill var(--transition-fast), stroke var(--transition-fast), transform var(--transition-fast);
}

.gallery-card__like.is-liked svg {
  fill: var(--accent-strong);
  stroke: var(--accent-strong);
  transform: scale(1.12);
}

.gallery-card__like-count {
  font-size: 0.78rem;
  line-height: 1;
  min-width: 0.6em;
}

.gallery-card__like-count:empty {
  display: none;
}

.gallery-card__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 1;
  padding: 0.75rem 0.9rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-main);
  background: linear-gradient(to top, rgba(0,0,0,0.75), transparent);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.gallery-card:hover .gallery-card__caption {
  opacity: 1;
  transform: translateY(0);
}

.gallery-empty {
  color: var(--text-muted);
  font-family: var(--font-ui);
  padding: 3rem 0;
  text-align: center;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(2, 2, 3, 0.92);
  padding: 2rem;
  height: 100dvh;
}

.lightbox__stage {
  margin: 0 auto;
}

.lightbox.is-open { display: flex; }

.lightbox__stage {
  position: relative;
  max-width: min(90vw, 1100px);
  max-height: 88vh;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 60px var(--accent-glow);
}

.lightbox__stage img,
.lightbox__stage video {
  max-width: min(90vw, 1100px);
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
}

.lightbox__meta {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 1rem 1.25rem;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: var(--text-main);
  font-family: var(--font-ui);
  pointer-events: none;
}

.lightbox__meta .title { font-family: var(--font-display); font-size: 1.2rem; }
.lightbox__meta .category { color: var(--text-muted); font-size: 0.85rem; }
.lightbox__meta.is-hidden { display: none; }

.lightbox__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.45);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.lightbox__prev { left: 1rem; }
.lightbox__next { right: 1rem; }

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0,0,0,0.55);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.1rem;
  line-height: 1;
  z-index: 5;
}

@media (max-width: 640px) {
  .lightbox { padding: 0.75rem; }
  .lightbox__btn { width: 38px; height: 38px; }
  .lightbox__close { width: 46px; height: 46px; font-size: 1.8rem; top: 0.5rem; right: 0.5rem; }
}

/* Ambient + theme-transition canvases */
.ambient-canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 12%, black 88%, transparent),
    linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(to bottom, transparent, black 12%, black 88%, transparent),
    linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  mask-composite: intersect;
}

.cursor-trail-canvas {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.theme-transition-canvas {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
}

.page-content { position: relative; z-index: 2; }

@media (prefers-reduced-motion: reduce) {
  .ambient-canvas, .theme-transition-canvas { display: none; }
}

/* Preloader — smoke intro playing "ART by LEXIE", once per page load */
.preloader {
  --preloader-fade: 1;
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #030304;
  pointer-events: none;
  opacity: 1;
  transition: opacity 950ms ease;
}

.preloader.is-dissolving {
  opacity: 0;
}

.preloader-canvas {
  position: absolute;
  inset: 0;
}

.preloader__title {
  position: relative;
  z-index: 1;
  font-family: var(--font-caps);
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #7a1015;
  text-shadow: 0 0 16px rgba(122, 16, 21, 0.9), 0 0 38px rgba(122, 16, 21, 0.65);
  opacity: var(--preloader-fade);
  animation: preloader-pulse 2.4s ease-in-out infinite;
  text-align: center;
}

.preloader__title span {
  display: inline-block;
  font-size: 0.55em;
  letter-spacing: 0.3em;
  vertical-align: middle;
  margin: 0 0.3em;
  color: inherit;
  text-shadow: inherit;
  opacity: 0.85;
}

@keyframes preloader-pulse {
  0%, 100% { text-shadow: 0 0 16px rgba(122, 16, 21, 0.9), 0 0 38px rgba(122, 16, 21, 0.65); }
  50% { text-shadow: 0 0 30px rgba(160, 24, 30, 1), 0 0 70px rgba(160, 24, 30, 0.9); }
}