/* =========================================================
   Gallery, Lightbox, Day-tabs, Preloader & LinkedIn moment
   Rohan Batra (@rohanbatrain) — HPE enterprise design language.

   Extends assets/css/styles.css + portfolio.css (HPE tokens).
   Load order: styles.css -> portfolio.css -> gallery.css
   (so this file intentionally overrides the older .gallery /
   .gallery__item rules in portfolio.css).

   Motif: the "HPE element" = a thin, SHARP-cornered green
   rectangle, and restrained HPE-green motion over a dark
   green-black ground. Green is a signature accent, never a
   wash. Everything is theme-aware (dark default + [data-theme])
   and responsive with no horizontal scroll.
   ========================================================= */


/* =========================================================
   1) PRELOADER  —  #preloader.preloader
   Full-screen HPE intro loader: dark green-black ground,
   three rising HPE-green rectangles, a letter-spaced wordmark,
   and a thin indeterminate track. JS adds .preloader--done.
   ========================================================= */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: var(--bg);
  /* Fade-out is driven by .preloader--done (JS), then hidden. */
  transition: opacity 0.6s var(--ease), visibility 0.6s var(--ease);
}
/* Restrained green aura behind the mark — the HPE ground glow. */
.preloader::before {
  content: "";
  position: absolute;
  top: 44%;
  left: 50%;
  width: min(620px, 90vw);
  height: 420px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--green-glow), transparent 62%);
  filter: blur(42px);
  opacity: 0.6;
  pointer-events: none;
}

.preloader__stage {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.55rem;
}

/* --- The HPE "element": three sharp green rectangles that
       rise from the baseline in a staggered wave. --- */
.preloader__element {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 58px;
}
.preloader__element span {
  display: block;
  width: 14px;
  height: 100%;
  background: var(--green);
  box-shadow: 0 8px 24px -6px var(--green-glow);
  transform-origin: bottom center;
  transform: scaleY(0.28);
  opacity: 0.5;
  animation: pl-rise 1.25s var(--ease) infinite;
}
.preloader__element span:nth-child(2) { background: var(--green-bright); animation-delay: 0.15s; }
.preloader__element span:nth-child(3) { animation-delay: 0.30s; }

@keyframes pl-rise {
  0%, 70%, 100% { transform: scaleY(0.28); opacity: 0.5; }
  35%           { transform: scaleY(1);    opacity: 1; }
}

/* --- Wordmark: quiet, letter-spaced, breathing. --- */
.preloader__word {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  /* nudge for the trailing letter-spacing so it optically centers */
  padding-left: 0.32em;
  color: var(--text-muted);
  animation: pl-breathe 2.4s ease-in-out infinite;
}
@keyframes pl-breathe {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 1; }
}

/* --- Thin indeterminate rail with a green sweep. --- */
.preloader__track {
  position: relative;
  width: 180px;
  max-width: 60vw;
  height: 3px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}
.preloader__track i {
  position: absolute;
  top: 0;
  left: -42%;
  height: 100%;
  width: 42%;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--green), var(--green-bright));
  animation: pl-track 1.4s var(--ease) infinite;
}
@keyframes pl-track {
  0%   { left: -42%; }
  100% { left: 100%; }
}

/* --- Done: fade + remove from the a11y/hit tree. --- */
.preloader--done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Reduced motion: no looping build/sweep. Present the loader in
   a calm, complete resting state (the global reduce rule freezes
   animations mid-frame, so we pin the finished look explicitly). */
@media (prefers-reduced-motion: reduce) {
  .preloader__element span { animation: none; transform: none; opacity: 1; }
  .preloader__word { animation: none; opacity: 1; }
  .preloader__track i { animation: none; left: 0; width: 100%; background: var(--green); }
}


/* =========================================================
   2) GALLERY GRID  —  .gallery / #galleryGrid
   Buttons rendered by gallery.js: <button class="gallery__item">
   <img></button>. Overrides the older portfolio.css rules.
   ========================================================= */
.gallery {
  display: grid;
  /* min(...,100%) keeps a single column from overflowing narrow phones */
  grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr));
  gap: clamp(0.6rem, 1.6vw, 1rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.gallery__item {
  /* --- reset the native button --- */
  appearance: none;
  -webkit-appearance: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  font: inherit;
  color: inherit;
  text-align: inherit;
  cursor: zoom-in;
  -webkit-tap-highlight-color: transparent;
  /* --- tile --- */
  width: 100%;
  display: block;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--surface-2); /* loading state — no white flash */
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow);
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}
/* Faint green overlay that rises on hover/focus. */
.gallery__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--green) 14%, transparent);
  opacity: 0;
  transition: opacity 0.28s var(--ease);
  pointer-events: none;
}
.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: var(--surface-2);
  transition: transform 0.5s var(--ease);
}

.gallery__item:hover,
.gallery__item:focus-visible {
  transform: translateY(-3px);
  border-color: var(--green);
  /* green shadow + a crisp inner ring = the "green ring" accent */
  box-shadow: var(--shadow-green), inset 0 0 0 1px var(--green);
}
.gallery__item:hover img,
.gallery__item:focus-visible img { transform: scale(1.05); }
.gallery__item:hover::after,
.gallery__item:focus-visible::after { opacity: 1; }

/* View-more mechanism hides overflow items. */
.gallery__item.is-hidden { display: none; }


/* =========================================================
   3) DAY-FILTER TABS  —  .gallery-tabs / .gallery-tab
   Clean pill segmented control, centered, wraps on mobile.
   ========================================================= */
.gallery-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  max-width: 820px;
  margin: 0 auto clamp(1.6rem, 3.5vh, 2.4rem);
}
.gallery-tab {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.55em 1.15em;
  transition: color 0.2s var(--ease), background 0.2s var(--ease),
              border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
              transform 0.2s var(--ease);
}
.gallery-tab:hover {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border-strong);
}
.gallery-tab:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}
/* Active = filled HPE green. */
.gallery-tab.is-active {
  color: var(--on-green);
  background: var(--green);
  border-color: var(--green);
  box-shadow: var(--shadow-green);
}
.gallery-tab.is-active:hover {
  color: var(--on-green);
  background: var(--green-bright);
  border-color: var(--green-bright);
}


/* =========================================================
   4) VIEW-MORE  —  .gallery-more (button reuses .btn.btn--ghost)
   ========================================================= */
.gallery-more {
  display: flex;
  justify-content: center;
  margin-top: clamp(1.4rem, 3vh, 2rem);
}
/* .btn sets display:inline-flex, which would defeat the [hidden]
   attribute — keep the button hidden until JS reveals it. */
.gallery-more .btn[hidden] { display: none; }
#galleryMoreCount {
  font-family: var(--font-mono);
  font-size: 0.85em;
  font-weight: 500;
  color: var(--text-muted);
}


/* =========================================================
   5) LINKEDIN MOMENT  —  .li-moment (an <a>)
   A tasteful mini post-preview: badge | body | cta.
   ========================================================= */
.li-moment {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.3rem);
  max-width: 640px;
  margin: clamp(1.8rem, 4vh, 2.6rem) auto 0;
  padding: clamp(1.1rem, 2.6vw, 1.5rem) clamp(1.2rem, 2.8vw, 1.6rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.li-moment:hover {
  transform: translateY(-3px);
  border-color: var(--green);
  box-shadow: var(--shadow-green);
}

/* The LinkedIn "in" mark — LinkedIn brand blue + white, kept
   literal so it reads as a shared post (not an HPE token). */
.li-moment__badge {
  flex: none;
  align-self: start;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 10px;
  background: #0a66c2;
  color: #fff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1;
  letter-spacing: -0.03em;
  box-shadow: 0 6px 18px -8px rgba(10, 102, 194, 0.7);
}

.li-moment__body {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0; /* allow text to wrap inside the grid track */
}
.li-moment__head {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.li-moment__head b {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--text);
}
.li-moment__sub { color: var(--text-dim); }
.li-moment__text {
  font-size: 0.96rem;
  line-height: 1.5;
  color: var(--text);
}
.li-moment__text b {
  font-weight: 600;
  color: var(--brand-ink); /* accent the hashtags in HPE green */
}
.li-moment__tags {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--text-dim);
}

.li-moment__cta {
  flex: none;
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green);
}
.li-moment__cta span { transition: transform 0.2s var(--ease); }
.li-moment:hover .li-moment__cta { color: var(--green-bright); }
.li-moment:hover .li-moment__cta span { transform: translateX(4px); }


/* =========================================================
   6) LIGHTBOX  —  .lightbox / #lightbox
   Full-screen in-page media viewer. The scrim is always dark
   (in BOTH themes), so its controls/text use fixed light-on-
   dark values; only the green accent comes from the tokens.
   Visibility is toggled by JS via [aria-hidden].
   ========================================================= */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9998;
  display: grid;
  place-items: center;
  padding: clamp(1rem, 4vw, 3rem);
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  /* hidden by default ([aria-hidden="true"] in the markup) */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
}
.lightbox[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.lightbox__stage {
  position: relative;
  z-index: 1;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  max-width: 92vw;
  transform: scale(0.96);
  transition: transform 0.3s var(--ease);
}
.lightbox[aria-hidden="false"] .lightbox__stage { transform: scale(1); }

.lightbox__media {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 92vw;
  max-height: 84vh;
}
.lightbox__media img,
.lightbox__media iframe {
  display: block;
  max-width: 92vw;
  max-height: 84vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.8);
  background: var(--surface-2);
}
.lightbox__media img {
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.3s var(--ease);
}
.lightbox__media iframe {
  width: min(92vw, 1200px);
  aspect-ratio: 16 / 9;
  height: auto;
  border: 0;
}
/* Optional click-to-zoom state. */
.lightbox__media.is-zoomed { cursor: zoom-out; }
.lightbox__media.is-zoomed img { transform: scale(1.5); cursor: zoom-out; }

.lightbox__caption {
  max-width: min(92vw, 720px);
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.72);
}

/* --- Controls: circular, glassy, green on hover --- */
.lightbox__btn {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease),
              color 0.2s var(--ease), transform 0.2s var(--ease);
}
.lightbox__btn:hover {
  background: var(--green);
  border-color: var(--green);
  color: var(--on-green);
  transform: scale(1.06);
}
.lightbox__btn:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.lightbox__close {
  top: clamp(0.8rem, 2.5vw, 1.5rem);
  right: clamp(0.8rem, 2.5vw, 1.5rem);
  font-size: 1.05rem;
}

/* Prev/next: large tap targets, vertically centered on the edges. */
.lightbox__nav {
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  font-size: 1.9rem;
}
.lightbox__prev { left: clamp(0.6rem, 2.5vw, 1.5rem); }
.lightbox__next { right: clamp(0.6rem, 2.5vw, 1.5rem); }
/* keep vertical centering while adding the hover pop */
.lightbox__nav:hover { transform: translateY(-50%) scale(1.06); }

.lightbox__count {
  position: absolute;
  bottom: clamp(0.8rem, 3vh, 1.6rem);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.62);
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

/* LinkedIn card: badge + body stay side-by-side, CTA drops below. */
@media (max-width: 540px) {
  .li-moment {
    grid-template-columns: auto 1fr;
    gap: 0.7rem 0.9rem;
  }
  .li-moment__cta {
    grid-column: 1 / -1;
    justify-content: flex-start;
    padding-top: 0.1rem;
  }
}

/* Lightbox on small screens: nav moves to the bottom corners,
   the counter to the top-left, so nothing overlaps the image. */
@media (max-width: 560px) {
  .lightbox__nav {
    top: auto;
    bottom: clamp(0.8rem, 3vh, 1.4rem);
    transform: none;
  }
  .lightbox__nav:hover { transform: scale(1.06); }
  .lightbox__prev { left: clamp(0.8rem, 5vw, 1.4rem); }
  .lightbox__next { right: clamp(0.8rem, 5vw, 1.4rem); }
  .lightbox__count {
    bottom: auto;
    top: clamp(0.8rem, 2.6vw, 1.4rem);
    left: clamp(0.8rem, 5vw, 1.4rem);
    transform: none;
  }
  .lightbox__btn { width: 44px; height: 44px; }
}