:root {
  --slide-bg: #050816;
  --slide-panel: #0b1023;
  --slide-text: #dbeafe;
  --slide-muted: #93c5fd;
  --slide-accent: #38bdf8;
}

* {
  box-sizing: border-box;
}

body.slide-deck-page {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 20% 10%, #0b122f 0%, var(--slide-bg) 45%, #020617 100%);
  color: var(--slide-text);
  font-family: "Avenir Next", "Segoe UI", system-ui, sans-serif;
  display: flex;
  flex-direction: column;
}

.slide-deck-header {
  padding: 18px 24px;
  border-bottom: 1px solid #1e293b;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(10px);
}

.slide-deck-header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.slide-meta h1 {
  margin: 0;
  font-size: clamp(1.1rem, 2.3vw, 1.75rem);
  line-height: 1.3;
}

.slide-theme {
  margin: 4px 0 0;
  color: var(--slide-muted);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.slide-back-link,
.slide-markdown-link {
  color: var(--slide-accent);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.slide-back-link:hover,
.slide-markdown-link:hover {
  text-decoration: underline;
}

.slide-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

.slide-viewport {
  position: relative;
  width: 100%;
  min-width: 0;
  max-width: 1320px;
}

.slide-frame {
  display: none;
  margin: 0;
}

.slide-frame.is-active {
  display: block;
}

.slide-frame svg {
  width: 100%;
  max-height: calc(100vh - 220px);
  min-height: 280px;
  display: block;
  border-radius: 16px;
  box-shadow: 0 22px 52px rgba(0, 0, 0, 0.45);
}

.slide-nav {
  border: 1px solid #1e3a5f;
  background: rgba(15, 23, 42, 0.88);
  color: #bae6fd;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 1.15rem;
  transition: transform 0.18s ease, background 0.18s ease;
  z-index: 20;
}

.slide-prev,
.slide-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.slide-prev {
  left: 14px;
}

.slide-next {
  right: 14px;
}

.slide-nav:hover:not(:disabled) {
  transform: scale(1.05);
  background: #0f2947;
}

.slide-prev:hover:not(:disabled),
.slide-next:hover:not(:disabled) {
  transform: translateY(-50%) scale(1.05);
}

.slide-nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.slide-footer {
  padding: 10px 24px 18px;
  color: #93c5fd;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 22px;
  font-size: 0.9rem;
}

.slide-font-controls {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.slide-font-btn {
  border: 1px solid #1e3a5f;
  background: rgba(15, 23, 42, 0.88);
  color: #bae6fd;
  border-radius: 8px;
  height: 34px;
  min-width: 36px;
  padding: 0 8px;
  cursor: pointer;
  font-size: 0.78rem;
  line-height: 1;
}

.slide-font-btn:hover:not(:disabled) {
  background: #0f2947;
}

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

.slide-font-value {
  min-width: 48px;
  text-align: center;
  color: #cfe7ff;
  font-size: 0.82rem;
}

body.slide-deck-embed {
  background: transparent;
  min-height: 100%;
}

.slide-deck-embed .slide-stage {
  max-width: none;
  padding: 0;
  min-height: calc(100vh - 54px);
}

.slide-deck-embed .slide-viewport {
  max-width: none;
  height: 100%;
}

.slide-deck-embed .slide-frame,
.slide-deck-embed .slide-frame.is-active {
  height: 100%;
}

.slide-deck-embed .slide-frame svg {
  border-radius: 0;
  box-shadow: none;
  max-height: calc(100vh - 54px);
  min-height: calc(100vh - 54px);
  height: calc(100vh - 54px);
}

.slide-embed-footer {
  min-height: 54px;
  padding: 8px 12px;
  border-top: 1px solid rgba(30, 58, 95, 0.7);
  background: rgba(2, 6, 23, 0.88);
  color: #cfe7ff;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
}

.slide-embed-nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
}

.slide-embed-nav .slide-nav {
  width: 40px;
  height: 40px;
  font-size: 0.95rem;
}

.slide-embed-nav #slide-counter {
  font-size: 0.88rem;
  color: #93c5fd;
  margin-left: 2px;
}

.slide-fullscreen-btn {
  margin-left: auto;
  border: 1px solid #1e3a5f;
  background: rgba(15, 23, 42, 0.88);
  color: #bae6fd;
  border-radius: 8px;
  height: 38px;
  padding: 0 10px;
  cursor: pointer;
  font-size: 0.82rem;
}

.slide-fullscreen-btn:hover {
  background: #0f2947;
}

.slide-embed-footer .slide-font-controls {
  margin-left: 6px;
}

@media (max-width: 840px) {
  .slide-deck-header-inner {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
  }

  .slide-stage {
    padding: 8px;
  }

  .slide-nav {
    width: 46px;
    height: 46px;
    font-size: 1rem;
  }

  .slide-prev {
    left: 8px;
  }

  .slide-next {
    right: 8px;
  }

  .slide-footer {
    flex-direction: column;
    align-items: center;
    gap: 6px;
  }

  .slide-embed-footer {
    padding: 6px 8px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .slide-embed-footer .slide-font-controls {
    margin-left: 0;
  }

  .slide-fullscreen-btn {
    height: 34px;
    font-size: 0.78rem;
    padding: 0 8px;
    margin-left: 0;
  }
}