/* Canvas and slide engine styles */
:root {
  --transition-duration: 0.5s;
  --scale: 1;
  --panX: 0px;
  --panY: 0px;

  /* Theme tokens (light defaults) */
  --color-canvas: #f8fafc;
  --color-surface: #ffffff;
  --color-panel: rgba(255, 255, 255, 0.88);
  --color-panel-soft: rgba(255, 255, 255, 0.72);
  --color-border: rgba(148, 163, 184, 0.35);
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-accent: #6366f1;
  --color-accent-soft: rgba(99, 102, 241, 0.14);
  --color-code-bg: #0d1117;
  --color-code-text: #e2e8f0;
  --overlay-bg: rgba(30, 41, 59, 0.85);
  --overlay-text: #f8fafc;
  --overlay-border: rgba(148, 163, 184, 0.45);
  --copy-btn-bg: rgba(30, 41, 59, 0.85);
  --copy-btn-text: #e2e8f0;
}

.dark {
  --color-canvas: #0f172a;
  --color-surface: #111827;
  --color-panel: rgba(30, 41, 59, 0.92);
  --color-panel-soft: rgba(30, 41, 59, 0.78);
  --color-border: rgba(148, 163, 184, 0.4);
  --color-text: #f8fafc;
  --color-text-muted: #cbd5f5;
  --color-accent: #a5b4fc;
  --color-accent-soft: rgba(99, 102, 241, 0.24);
  --color-code-bg: #0b1120;
  --color-code-text: #f8fafc;
  --overlay-bg: rgba(15, 23, 42, 0.85);
  --overlay-text: #f8fafc;
  --overlay-border: rgba(99, 102, 241, 0.35);
  --copy-btn-bg: rgba(51, 65, 85, 0.9);
  --copy-btn-text: #f8fafc;
}
html {
  height: 100%;
}
body {
  font-family: "Inter", sans-serif;
  /* Background handled by pertemuan pages to allow themed gradient */
  background-color: transparent;
  margin: 0;
  height: 100%;
  overflow: hidden;
  color: var(--color-text);
}

/* Container to hold the 16:9 canvas */
.canvas-container {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  /* Transparent so the page background shows through */
  background-color: transparent;
  overflow: hidden;
}

/* The canvas with a 16:9 aspect ratio */
.canvas {
  width: 1600px;
  height: 900px;
  background-color: var(--color-surface);
  position: absolute;
  top: 50%;
  left: 50%;
  transform-origin: center center;
  /* Apply pan after scale so pan distances are in screen pixels */
  transform: translate(-50%, -50%) translate(var(--panX), var(--panY))
    scale(var(--scale));
  overflow: hidden;
  border-radius: 0.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  color: var(--color-text);
}

/* Slide base + active state */
.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-canvas);
  color: var(--color-text);
  transition: transform var(--transition-duration) ease-in-out,
    opacity var(--transition-duration) ease-in-out;
  opacity: 0;
  pointer-events: none;
}
.slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

/* Code block cosmetic */
pre {
  position: relative;
}
pre code.hljs {
  display: block;
  overflow-x: auto;
  padding: 1em;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
}
.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background-color: var(--copy-btn-bg);
  color: var(--copy-btn-text);
  border: none;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  cursor: pointer;
  font-size: 0.75rem;
  opacity: 0.2;
  transition: opacity 0.2s;
}
pre:hover .copy-btn {
  opacity: 1;
}

/* Controls overlay base transition and hidden state */
#controlsOverlay {
  transition: opacity 0.25s ease, transform 0.25s ease;
}

#controlsOverlay.controls-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
}

/* Apply the same hidden treatment to the zoom panel */
#zoomPanel.controls-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Apply the same hidden treatment to the back button */
#backBtn.controls-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Theme-aware helpers */
.theme-canvas {
  background-color: var(--color-canvas);
  color: var(--color-text);
}

.theme-surface {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.theme-panel {
  background-color: var(--color-panel);
  color: var(--color-text);
}

.theme-panel-soft {
  background-color: var(--color-panel-soft);
  color: var(--color-text);
}

.theme-card {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: 0 18px 48px -24px rgba(15, 23, 42, 0.45);
}

.theme-chip {
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: 9999px;
  padding: 0.25rem 0.75rem;
}

.theme-border {
  border-color: var(--color-border);
}

.theme-accent {
  color: var(--color-accent);
}

.theme-muted {
  color: var(--color-text-muted);
}

/* Controls + overlays adopt theme tokens */
.control-btn {
  background-color: var(--overlay-bg);
  color: var(--overlay-text);
  border: 1px solid var(--overlay-border);
  border-radius: 1.25rem;
  padding: 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 12px 32px -20px rgba(15, 23, 42, 0.65);
  /* Frosted glass effect */
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  transition: background-color 0.2s ease, border-color 0.2s ease,
    color 0.2s ease, transform 0.2s ease;
}

.control-btn svg {
  width: 24px;
  height: 24px;
}

.control-btn:hover:not(:disabled) {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.control-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.control-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.control-btn--compact {
  padding: 0.5rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
}

.control-counter {
  color: var(--overlay-text);
  font-size: 1.125rem;
  font-weight: 600;
  min-width: 72px;
  text-align: center;
}

/* Counter background wrapper for readability on all themes */
.counter-badge {
  display: inline-block;
  background-color: var(--overlay-bg);
  color: var(--overlay-text);
  border: 1px solid var(--overlay-border);
  border-radius: 9999px;
  padding: 0.35rem 0.75rem;
  box-shadow: 0 12px 32px -20px rgba(15, 23, 42, 0.65);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
}

.zoom-indicator {
  background-color: var(--overlay-bg);
  color: var(--overlay-text);
  border: 1px solid var(--overlay-border);
  border-radius: 9999px;
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  box-shadow: 0 12px 32px -20px rgba(15, 23, 42, 0.65);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  cursor: pointer;
}

.zoom-indicator:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.zoom-controls {
  display: flex;
  flex-direction: column;
  background-color: var(--overlay-bg);
  border: 1px solid var(--overlay-border);
  border-radius: 9999px;
  overflow: hidden;
  box-shadow: 0 12px 32px -20px rgba(15, 23, 42, 0.65);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
}

.zoom-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem;
  background: transparent;
  color: var(--overlay-text);
  border: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.zoom-btn svg {
  width: 22px;
  height: 22px;
}

.zoom-btn + .zoom-btn {
  border-top: 1px solid var(--overlay-border);
}

.zoom-btn:hover:not(:disabled) {
  background-color: var(--color-accent);
  color: #ffffff;
}

.zoom-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.back-button {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 60;
}

/* Compact tools on small screens */
@media (max-width: 640px) {
  #controlsOverlay {
    bottom: 0.25rem; /* tighter to overlap with zoom panel */
    gap: 0.5rem;
  }
  #controlsOverlay button {
    padding: 0.5rem !important; /* override Tailwind p-3 */
  }
  #controlsOverlay svg {
    width: 20px;
    height: 20px;
  }
  #controlsOverlay #slideCounter {
    font-size: 0.875rem; /* text-sm */
    min-width: 64px; /* smaller counter width */
  }
  #zoomPanel {
    right: 0.25rem;
    bottom: 0.25rem;
  }
}

/* Optional: cursor feedback when panning */
.is-zoomed #presentation-canvas {
  cursor: grab;
}
.is-zoomed #presentation-canvas.panning {
  cursor: grabbing;
}

/* Disable text selection during panning to avoid accidental highlights */
#presentation-canvas.panning,
#presentation-canvas.panning * {
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
}