/* ── MOTION CURTAINS CSS ──────────────────────────────────────
   Design System: DeV-ZEr0 Cyberpunk / Minimal Developer Canvas
   Inspired by motion.dev/docs/curtains
   GPU-accelerated, high-performance viewport transitions
───────────────────────────────────────────────────────────── */

:root {
  --curtain-bg: var(--bg, #0a0a0a);
  --curtain-surface: var(--surface, #121212);
  --curtain-border: var(--border, #262626);
  --curtain-accent: var(--accent, #ffffff);
  --curtain-emerald: #10b981;
}

:root[data-theme="light"], body[data-theme="light"], [data-theme="light"] {
  --curtain-bg: #FAFAFA;
  --curtain-surface: #FFFFFF;
  --curtain-border: #E5E7EB;
  --curtain-accent: #111827;
  --curtain-emerald: #059669;
}

:root[data-theme="dark"], body[data-theme="dark"], [data-theme="dark"] {
  --curtain-bg: #0A0A0A;
  --curtain-surface: #121212;
  --curtain-border: #262626;
  --curtain-accent: #FFFFFF;
  --curtain-emerald: #10B981;
}

/* Master Overlay Container (Popover / Top Layer emulation) */
.motion-curtains {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2147483647; /* Maximum browser z-index */
  pointer-events: none;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  contain: strict;
  display: block;
}

.motion-curtains.active {
  pointer-events: all;
  cursor: wait;
}

/* Base Curtain Element */
.motion-curtain {
  background: var(--curtain-bg);
  box-sizing: border-box;
  will-change: transform, opacity, clip-path;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* ── HUD WATERMARK (Center Status Monogram) ── */
.motion-curtains-hud {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.motion-curtains.hud-visible .motion-curtains-hud {
  opacity: 1;
}

.motion-curtains-hud .hud-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: 9999px;
  background: rgba(18, 18, 18, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.motion-curtains-hud .hud-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--curtain-emerald);
  box-shadow: 0 0 8px var(--curtain-emerald);
  animation: hudPulse 1.2s ease-in-out infinite alternate;
}

.motion-curtains-hud .hud-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--curtain-accent);
}

.motion-curtains-hud .hud-effect {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(243, 244, 246, 0.55);
}

@keyframes hudPulse {
  0% { opacity: 0.4; transform: scale(0.85); }
  100% { opacity: 1; transform: scale(1.15); box-shadow: 0 0 12px var(--curtain-emerald); }
}

body[data-theme="light"] .motion-curtains-hud .hud-badge {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}
body[data-theme="light"] .motion-curtains-hud .hud-title {
  color: var(--curtain-accent);
}
body[data-theme="light"] .motion-curtains-hud .hud-effect {
  color: rgba(17, 24, 39, 0.6);
}

/* ── EFFECT-SPECIFIC DOM LAYOUTS ── */

/* 1. Wipe Panel */
.motion-curtains-wipe-panel {
  position: absolute;
  inset: -15% -15%;
  width: 130%;
  height: 130%;
  background: var(--curtain-bg);
}

/* 2. Clip Wipe Panel */
.motion-curtains-clip-panel {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--curtain-bg);
}

/* 3. Iris Panel */
.motion-curtains-iris-panel {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--curtain-bg);
}

/* 4. Doors Panels */
.motion-curtains-door {
  position: absolute;
  background: var(--curtain-bg);
}
.motion-curtains-door-left {
  top: 0;
  bottom: 0;
  left: 0;
  width: 50.5vw;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}
.motion-curtains-door-right {
  top: 0;
  bottom: 0;
  right: 0;
  width: 50.5vw;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}
.motion-curtains-door-top {
  top: 0;
  left: 0;
  right: 0;
  height: 50.5vh;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.motion-curtains-door-bottom {
  bottom: 0;
  left: 0;
  right: 0;
  height: 50.5vh;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* 5. Pixels Grid */
.motion-curtains-pixels-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: grid;
  pointer-events: none;
}
.motion-curtains-pixel {
  background: var(--curtain-bg);
  outline: 1px solid rgba(255, 255, 255, 0.03);
}

/* 6. Blinds Slat Container */
.motion-curtains-blinds {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
}
.motion-curtains-blinds.rows {
  flex-direction: column;
}
.motion-curtains-blinds.cols {
  flex-direction: row;
}
.motion-curtains-slat {
  flex: 1 1 0%;
  background: var(--curtain-bg);
  outline: 1px solid rgba(255, 255, 255, 0.03);
}

/* 7. Shutter Columns */
.motion-curtains-shutter {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: row;
}
.motion-curtains-shutter-col {
  flex: 1 1 0%;
  height: 100%;
  background: var(--curtain-bg);
  border-left: 1px solid rgba(255, 255, 255, 0.03);
  border-right: 1px solid rgba(255, 255, 255, 0.03);
}

/* 8. Stagger Wipe Strips */
.motion-curtains-stagger {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
}
.motion-curtains-stagger.vertical {
  flex-direction: row;
}
.motion-curtains-stagger.horizontal {
  flex-direction: column;
}
.motion-curtains-strip {
  flex: 1 1 0%;
  background: var(--curtain-bg);
  border-left: 1px solid rgba(255, 255, 255, 0.03);
}

/* 9. Fade Veil */
.motion-curtains-fade-panel {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--curtain-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ── PREFERS REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  .motion-curtain,
  .motion-curtains-wipe-panel,
  .motion-curtains-clip-panel,
  .motion-curtains-iris-panel,
  .motion-curtains-door,
  .motion-curtains-pixel,
  .motion-curtains-slat,
  .motion-curtains-shutter-col,
  .motion-curtains-strip,
  .motion-curtains-fade-panel {
    transition: opacity 0.15s ease-out !important;
    animation: none !important;
    transform: none !important;
    clip-path: none !important;
  }
}