/* ============================================================
   HOLOGRAPHIC CARD STACK v2.0 — Stylesheet
   ============================================================ */

/* ── CSS Variables ──────────────────────────────────────────── */
:root {
  --hcs-neon:    #00f5ff;
  --hcs-neon2:   #ff00c8;
  --hcs-aspect:  4/3;
  --hcs-radius:  18px;
  --hcs-card-w:  min(480px, 90vw);
}

/* ── Wrapper ────────────────────────────────────────────────── */
.hcs-wrapper {
  position: relative;
  width: 100%;
  padding: 80px 24px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  overflow: hidden;
  border-radius: 24px;
  box-sizing: border-box;
  font-family: 'Segoe UI', system-ui, sans-serif;
  -webkit-user-select: none;
  user-select: none;
}

/* Ambient glow */
.hcs-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 700px 500px at 50% 50%,
    color-mix(in srgb, var(--hcs-neon) 7%, transparent) 0%,
    transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── Backgrounds ────────────────────────────────────────────── */
.hcs-bg-dark-grey    { background: #141418; }
.hcs-bg-black        { background: #000; }
.hcs-bg-gradient     { background: radial-gradient(ellipse at 30% 20%, #0d1a2e, #060c15 60%, #0a0610); }
.hcs-bg-gradient-vw  { background: linear-gradient(135deg, #1a0535 0%, #2d1b4e 50%, #0d2b4a 100%); }
.hcs-bg-gradient-ice { background: linear-gradient(180deg, #071a2e 0%, #0a2a4a 60%, #051520 100%); }
.hcs-bg-none         { background: transparent; }

/* ── Theme scanline textures ────────────────────────────────── */
.hcs-bg-gradient-vw::after,
.hcs-bg-black.hcs-theme-matrix::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Particle Canvas ────────────────────────────────────────── */
.hcs-particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

/* ── Scene ──────────────────────────────────────────────────── */
.hcs-scene {
  position: relative;
  z-index: 1;
  width: var(--hcs-card-w);
  perspective: 1200px;
  perspective-origin: 50% 50%;
}

.hcs-stack {
  position: relative;
  width: 100%;
  touch-action: pan-y; /* allow vertical scroll; horizontal hijacked by drag */
}

/* ── Drag Indicator ─────────────────────────────────────────── */
.hcs-drag-indicator {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  pointer-events: none;
  z-index: 20;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.hcs-stack.hcs-dragging .hcs-drag-indicator { opacity: 1; }

.hcs-drag-left,
.hcs-drag-right {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hcs-neon);
  text-shadow: 0 0 12px var(--hcs-neon);
  padding: 6px 12px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--hcs-neon) 12%, rgba(0,0,0,0.6));
  border: 1px solid color-mix(in srgb, var(--hcs-neon) 40%, transparent);
  backdrop-filter: blur(8px);
  transition: opacity 0.2s ease;
}

.hcs-stack.hcs-drag-right-active .hcs-drag-left  { opacity: 0; }
.hcs-stack.hcs-drag-left-active  .hcs-drag-right { opacity: 0; }

/* ── Card ───────────────────────────────────────────────────── */
.hcs-card {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  transform-style: preserve-3d;
  transform-origin: center center;
  cursor: grab;
  will-change: transform;
}

.hcs-card:active { cursor: grabbing; }
.hcs-card.hcs-ghost { pointer-events: none; cursor: default; }

/* ── Card Faces ─────────────────────────────────────────────── */
.hcs-card-face {
  width: 100%;
  aspect-ratio: var(--hcs-aspect);
  border-radius: var(--hcs-radius);
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  position: relative;
}

.hcs-card-back-face {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--hcs-radius);
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: rotateY(180deg);
}

/* ── Front Image / Video ────────────────────────────────────── */
.hcs-card-img,
.hcs-card-video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--hcs-radius);
  pointer-events: none;
}

/* ── Neon Border Glow ───────────────────────────────────────── */
.hcs-card-face {
  box-shadow:
    0 0 0 2px color-mix(in srgb, var(--hcs-neon) 55%, transparent),
    0 0 28px color-mix(in srgb, var(--hcs-neon) 22%, transparent),
    0 0 70px color-mix(in srgb, var(--hcs-neon) 10%, transparent),
    0 8px 40px rgba(0,0,0,0.6);
}

/* ── Holographic Scanlines ──────────────────────────────────── */
.hcs-card-face::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 3;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(255,255,255,0.015) 3px,
    rgba(255,255,255,0.015) 4px
  );
  mix-blend-mode: overlay;
}

/* ── Glare ──────────────────────────────────────────────────── */
.hcs-glare {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.18) 0%, transparent 60%);
  mix-blend-mode: screen;
  transition: background 0.1s ease;
}

/* ── Caption ────────────────────────────────────────────────── */
.hcs-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px 16px 14px;
  background: linear-gradient(to top, rgba(0,0,0,0.78) 0%, transparent 100%);
  border-radius: 0 0 var(--hcs-radius) var(--hcs-radius);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  z-index: 5;
  text-shadow: 0 1px 4px rgba(0,0,0,0.9);
}

/* ══════════════════════════════════════════════════════════════
   CARD BACK — Text/Metadata layout
   ══════════════════════════════════════════════════════════════ */
.hcs-back-text {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  box-sizing: border-box;
  text-align: center;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--hcs-neon) 10%, #0a0a0f) 0%,
    color-mix(in srgb, var(--hcs-neon2) 8%, #0a0a0f) 100%);
  position: relative;
  overflow: hidden;
}

/* Grid pattern on back */
.hcs-back-text::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--hcs-neon) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--hcs-neon) 8%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hcs-back-title {
  font-size: clamp(18px, 3vw, 26px);
  font-weight: 700;
  color: var(--hcs-neon);
  text-shadow:
    0 0 12px var(--hcs-neon),
    0 0 30px color-mix(in srgb, var(--hcs-neon) 50%, transparent);
  letter-spacing: 0.04em;
  margin: 0;
  position: relative;
  z-index: 1;
}

.hcs-back-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin: 0;
  max-width: 32ch;
  position: relative;
  z-index: 1;
}

.hcs-back-meta-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.hcs-back-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hcs-neon);
  border: 1px solid color-mix(in srgb, var(--hcs-neon) 50%, transparent);
  background: color-mix(in srgb, var(--hcs-neon) 10%, transparent);
  border-radius: 20px;
  padding: 4px 10px;
}

.hcs-back-btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 30px;
  background: transparent;
  border: 2px solid var(--hcs-neon);
  color: var(--hcs-neon);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 14px color-mix(in srgb, var(--hcs-neon) 25%, transparent);
}

.hcs-back-btn:hover {
  background: color-mix(in srgb, var(--hcs-neon) 18%, transparent);
  box-shadow: 0 0 24px color-mix(in srgb, var(--hcs-neon) 50%, transparent);
}

/* ── Back Image ─────────────────────────────────────────────── */
.hcs-back-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ══════════════════════════════════════════════════════════════
   DRAG STATES
   ══════════════════════════════════════════════════════════════ */
.hcs-card.hcs-dragging-card {
  transition: none !important;
  cursor: grabbing;
}

/* Fly-out trails */
.hcs-card.hcs-fly-left {
  transform: translateX(-140%) rotate(-20deg) !important;
  opacity: 0 !important;
  transition: transform 0.4s cubic-bezier(0.4,0,0.6,1), opacity 0.35s ease !important;
}

.hcs-card.hcs-fly-right {
  transform: translateX(140%) rotate(20deg) !important;
  opacity: 0 !important;
  transition: transform 0.4s cubic-bezier(0.4,0,0.6,1), opacity 0.35s ease !important;
}

/* ── Hover ──────────────────────────────────────────────────── */
.hcs-card.hcs-active:not(.hcs-dragging-card):hover .hcs-card-face {
  box-shadow:
    0 0 0 2px var(--hcs-neon),
    0 0 36px color-mix(in srgb, var(--hcs-neon) 55%, transparent),
    0 0 90px color-mix(in srgb, var(--hcs-neon) 28%, transparent),
    0 16px 48px rgba(0,0,0,0.7);
}

/* ── Flip Keyframes ─────────────────────────────────────────── */
.hcs-card.hcs-flip-out { transform: rotateY(90deg) scale(0.94) !important; opacity: 0; }
.hcs-card.hcs-flip-in  { transform: rotateY(-90deg) scale(0.94) !important; opacity: 0; }

/* ── Ghost ──────────────────────────────────────────────────── */
.hcs-card.hcs-ghost-1 { z-index: 2; }
.hcs-card.hcs-ghost-2 { z-index: 1; }
.hcs-card.hcs-ghost-3 { z-index: 0; }

/* ══════════════════════════════════════════════════════════════
   CONTROLS
   ══════════════════════════════════════════════════════════════ */
.hcs-controls {
  display: flex;
  align-items: center;
  gap: 24px;
  z-index: 1;
}

.hcs-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--hcs-neon) 40%, transparent);
  background: color-mix(in srgb, var(--hcs-neon) 8%, rgba(0,0,0,0.4));
  color: var(--hcs-neon);
  cursor: pointer;
  transition: all 0.25s ease;
  outline: none;
  backdrop-filter: blur(8px);
}

.hcs-btn svg { width: 22px; height: 22px; fill: currentColor; }

.hcs-btn:hover {
  background: color-mix(in srgb, var(--hcs-neon) 20%, transparent);
  border-color: var(--hcs-neon);
  box-shadow: 0 0 14px color-mix(in srgb, var(--hcs-neon) 40%, transparent);
  transform: scale(1.08);
}

.hcs-btn:active { transform: scale(0.96); }

.hcs-counter {
  font-size: 15px;
  color: rgba(255,255,255,0.55);
  min-width: 56px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.hcs-current { color: var(--hcs-neon); font-weight: 700; }
.hcs-sep     { margin: 0 2px; }

/* ── Dots ───────────────────────────────────────────────────── */
.hcs-dots {
  display: flex;
  gap: 8px;
  z-index: 1;
  flex-wrap: wrap;
  justify-content: center;
  max-width: var(--hcs-card-w);
}

.hcs-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  padding: 0;
  transition: all 0.25s ease;
  outline: none;
}

.hcs-dot.active,
.hcs-dot:hover {
  background: var(--hcs-neon);
  box-shadow: 0 0 8px var(--hcs-neon);
  transform: scale(1.4);
}

/* ══════════════════════════════════════════════════════════════
   LIGHTBOX
   ══════════════════════════════════════════════════════════════ */
.hcs-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99999;
  align-items: center;
  justify-content: center;
}

.hcs-lightbox.hcs-lb-open { display: flex; }

.hcs-lightbox-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(12px);
  cursor: zoom-out;
}

.hcs-lightbox-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: min(900px, 92vw);
  width: 100%;
  padding: 24px;
}

.hcs-lightbox-img {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--hcs-radius);
  box-shadow:
    0 0 0 2px var(--hcs-neon),
    0 0 60px color-mix(in srgb, var(--hcs-neon) 30%, transparent),
    0 32px 80px rgba(0,0,0,0.8);
  display: block;
  transition: opacity 0.25s ease;
}

.hcs-lightbox-caption {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
  text-align: center;
  margin: 0;
}

.hcs-lightbox-close,
.hcs-lightbox-prev,
.hcs-lightbox-next {
  position: absolute;
  background: color-mix(in srgb, var(--hcs-neon) 12%, rgba(0,0,0,0.6));
  border: 2px solid color-mix(in srgb, var(--hcs-neon) 40%, transparent);
  color: var(--hcs-neon);
  cursor: pointer;
  border-radius: 50%;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  transition: all 0.2s ease;
  outline: none;
  backdrop-filter: blur(8px);
}

.hcs-lightbox-close { top: -20px; right: 0; }
.hcs-lightbox-prev  { left: -28px; top: 50%; transform: translateY(-50%); }
.hcs-lightbox-next  { right: -28px; top: 50%; transform: translateY(-50%); }

.hcs-lightbox-close:hover,
.hcs-lightbox-prev:hover,
.hcs-lightbox-next:hover {
  background: color-mix(in srgb, var(--hcs-neon) 30%, transparent);
  border-color: var(--hcs-neon);
  box-shadow: 0 0 16px color-mix(in srgb, var(--hcs-neon) 50%, transparent);
}

.hcs-lightbox-prev:hover { transform: translateY(-50%) scale(1.1); }
.hcs-lightbox-next:hover { transform: translateY(-50%) scale(1.1); }

/* ══════════════════════════════════════════════════════════════
   THEME OVERRIDES
   ══════════════════════════════════════════════════════════════ */

/* Cyberpunk — thick scanline grid */
.hcs-theme-cyberpunk .hcs-card-face::after {
  background: repeating-linear-gradient(
    0deg, transparent, transparent 5px,
    rgba(247,226,0,0.04) 5px, rgba(247,226,0,0.04) 6px
  );
}

/* Vaporwave — colour-shifted chrome */
.hcs-theme-vaporwave .hcs-glare {
  background: radial-gradient(
    circle at 40% 30%,
    rgba(255,113,206,0.22) 0%,
    rgba(185,103,255,0.12) 40%,
    transparent 70%
  );
}

/* Matrix — green rain texture via gradient */
.hcs-theme-matrix .hcs-back-text {
  background: linear-gradient(180deg, #001a00 0%, #000d00 100%);
  font-family: 'Courier New', monospace;
}

/* Gold — warm warm radial */
.hcs-theme-gold .hcs-glare {
  background: radial-gradient(
    ellipse at 35% 25%,
    rgba(255,230,100,0.3) 0%,
    rgba(184,134,11,0.1) 50%,
    transparent 70%
  );
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 600px) {
  .hcs-wrapper { padding: 48px 16px 40px; }
  :root { --hcs-card-w: min(360px, 92vw); }
  .hcs-lightbox-prev { left: -16px; }
  .hcs-lightbox-next { right: -16px; }
  .hcs-back-title { font-size: 18px; }
}

/* ── Reduce Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .hcs-card, .hcs-card-face, .hcs-glare,
  .hcs-btn, .hcs-dot, .hcs-lightbox-img {
    transition: none !important;
    animation: none !important;
  }
}