:root {
  --ivory: #f7f3ec;
  --ivory-deep: #efe8db;
  --rose-gold: #b76e79;
  --rose-gold-soft: rgba(183, 110, 121, 0.55);
  --ink: #2b2621;
  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-duration: 420ms;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: linear-gradient(160deg, var(--ivory) 0%, var(--ivory-deep) 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Progress bar ---------- */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--rose-gold);
  opacity: 0.55;
  z-index: 50;
  pointer-events: none;
  transition: width var(--transition-duration) var(--ease-spring);
}

/* ---------- Deck / Slides ---------- */

.deck {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: pan-y;
}

.slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 3vw, 48px);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.985) translateY(10px);
  transition:
    opacity var(--transition-duration) var(--ease-spring),
    transform var(--transition-duration) var(--ease-spring);
  will-change: opacity, transform;
}

.slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1) translateY(0);
  z-index: 2;
}

.slide.prev {
  transform: scale(0.985) translateY(-10px);
}

.slide img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: 0 20px 60px rgba(43, 38, 33, 0.12);
  border-radius: 6px;
  user-select: none;
  -webkit-user-drag: none;
}

@media (prefers-reduced-motion: reduce) {
  .slide {
    transition: opacity 250ms ease;
    transform: none !important;
  }
}

/* ---------- Slide indicator ---------- */

.indicator {
  position: fixed;
  right: 20px;
  bottom: 18px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink);
  opacity: 0.35;
  z-index: 40;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  transition: opacity 200ms ease;
}

/* ---------- Nav dots ---------- */

.dots {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 40;
  padding: 6px 10px;
  transition: opacity 250ms ease, transform 250ms ease;
}

.dots.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(6px);
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink);
  opacity: 0.22;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: opacity 220ms var(--ease-spring), transform 220ms var(--ease-spring), background 220ms ease;
}

.dot:hover {
  opacity: 0.45;
}

.dot:focus-visible {
  outline: 2px solid var(--rose-gold);
  outline-offset: 3px;
}

.dot.active {
  background: var(--rose-gold);
  opacity: 0.9;
  transform: scale(1.4);
}

/* ---------- Presenter overlay ---------- */

.presenter-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 40px;
  background: rgba(20, 16, 14, 0.28);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 280ms var(--ease-spring);
}

.presenter-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.presenter-panel {
  position: relative;
  width: min(680px, 92vw);
  background: rgba(28, 22, 19, 0.82);
  color: #f3ece3;
  border-radius: 16px;
  padding: 24px 28px 20px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transform: translateY(16px);
  transition: transform 280ms var(--ease-spring);
}

.presenter-overlay.visible .presenter-panel {
  transform: translateY(0);
}

.presenter-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.presenter-close:hover { color: #fff; }

.presenter-row {
  display: flex;
  gap: 32px;
}

.presenter-top {
  margin-bottom: 16px;
}

.presenter-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.presenter-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(243, 236, 227, 0.45);
}

.presenter-value {
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  color: var(--rose-gold);
  font-weight: 600;
}

.presenter-previews {
  display: flex;
  gap: 16px;
  margin-bottom: 18px;
}

.presenter-preview-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.presenter-preview-block img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.presenter-shortcuts {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 18px;
  font-size: 12px;
  color: rgba(243, 236, 227, 0.75);
}

kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  font-family: inherit;
}

/* ---------- Print / PDF export ---------- */

@media print {
  @page {
    size: 12in 8in landscape;
    margin: 0;
  }

  html, body {
    overflow: visible;
    background: #fff;
    height: auto;
  }

  .progress-bar,
  .indicator,
  .dots,
  .presenter-overlay {
    display: none !important;
  }

  .deck {
    position: static;
    width: 100%;
    height: auto;
    overflow: visible;
  }

  .slides {
    position: static;
    height: auto;
  }

  .slide {
    position: relative;
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    pointer-events: auto;
    width: 100vw;
    height: 100vh;
    page-break-after: always;
    break-after: page;
    padding: 0;
  }

  .slide:last-child {
    page-break-after: auto;
    break-after: auto;
  }

  .slide img {
    box-shadow: none;
    border-radius: 0;
    max-width: 100%;
    max-height: 100%;
  }
}