:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-accent: #30363d;
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-accent: #58a6ff;
  --text-highlight: #79c0ff;
  --text-code: #e6edf3;
  --accent-purple: #a371f7;
  --accent-green: #3fb950;
  --accent-orange: #f0883e;
  --accent-red: #f85149;
  --accent-yellow: #f5a623;
  --border-color: #30363d;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-family-mono: 'Cascadia Code', 'JetBrains Mono', 'Fira Code', Consolas, 'Courier New', monospace;
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

.reveal-viewport {
  background: var(--bg-primary);
  background-image: radial-gradient(circle at 20% 80%, var(--bg-secondary) 0%, transparent 50%),
                    radial-gradient(circle at 80% 20%, var(--bg-tertiary) 0%, transparent 50%);
}

.reveal {
  font-family: var(--font-family-base);
  font-size: 36px;
  font-weight: normal;
  color: var(--text-primary);
}

.reveal ::selection {
  color: var(--bg-primary);
  background: var(--text-highlight);
  text-shadow: none;
}

.reveal .slides section,
.reveal .slides section > section {
  line-height: 1.3;
  font-weight: inherit;
}

.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  margin: 0 0 20px 0;
  color: var(--text-primary);
  font-family: var(--font-family-base);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-transform: none;
  text-shadow: none;
  word-wrap: break-word;
}

.reveal h1 { font-size: 2.5em; }
.reveal h2 { font-size: 1.6em; }
.reveal h3 { font-size: 1.3em; }
.reveal h4 { font-size: 1em; }

.reveal h1 {
  text-shadow: none;
}

.reveal p {
  margin: 20px 0;
  line-height: 1.3;
}

.reveal img,
.reveal video,
.reveal iframe {
  max-width: 95%;
  max-height: 95%;
}

.reveal strong,
.reveal b {
  font-weight: bold;
}

.reveal em {
  font-style: italic;
}

.reveal ol,
.reveal dl,
.reveal ul {
  display: inline-block;
  text-align: left;
  margin: 0 0 0 1em;
}

.reveal ol {
  list-style-type: decimal;
}

.reveal ul {
  list-style-type: disc;
}

.reveal ul ul {
  list-style-type: square;
}

.reveal ul ul ul {
  list-style-type: circle;
}

.reveal ul ul,
.reveal ul ol,
.reveal ol ol,
.reveal ol ul {
  display: block;
  margin-left: 40px;
}

.reveal dt {
  font-weight: bold;
}

.reveal dd {
  margin-left: 40px;
}

.reveal blockquote {
  display: block;
  position: relative;
  width: 70%;
  margin: 20px auto;
  padding: 5px;
  font-style: italic;
  background: var(--bg-secondary);
  border-left: 4px solid var(--text-accent);
  box-shadow: var(--shadow-sm);
}

.reveal blockquote p:first-child,
.reveal blockquote p:last-child {
  display: inline-block;
}

.reveal q {
  font-style: italic;
}

.reveal pre {
  display: block;
  position: relative;
  width: 90%;
  margin: 20px auto;
  text-align: left;
  font-size: 0.55em;
  font-family: var(--font-family-mono);
  line-height: 1.2em;
  word-wrap: break-word;
  box-shadow: var(--shadow-md);
}

.reveal code {
  font-family: var(--font-family-mono);
  text-transform: none;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-code);
}

.reveal pre code {
  display: block;
  padding: 5px;
  overflow: auto;
  max-height: 400px;
  word-wrap: normal;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.reveal table {
  margin: auto;
  border-collapse: collapse;
  border-spacing: 0;
}

.reveal table th {
  font-weight: bold;
  background: var(--bg-tertiary);
}

.reveal table th,
.reveal table td {
  text-align: left;
  padding: 0.2em 0.5em 0.2em 0.5em;
  border-bottom: 1px solid var(--border-color);
}

.reveal table th[align="center"],
.reveal table td[align="center"] {
  text-align: center;
}

.reveal table th[align="right"],
.reveal table td[align="right"] {
  text-align: right;
}

.reveal table tbody tr:last-child th,
.reveal table tbody tr:last-child td {
  border-bottom: none;
}

.reveal sup {
  vertical-align: super;
  font-size: smaller;
}

.reveal sub {
  vertical-align: sub;
  font-size: smaller;
}

.reveal small {
  display: inline-block;
  font-size: 0.6em;
  line-height: 1.2em;
  vertical-align: top;
}

.reveal small * {
  vertical-align: top;
}

.reveal a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.reveal a:hover {
  color: var(--text-highlight);
  text-shadow: none;
  border: none;
}

.reveal .roll span:after {
  color: #fff;
  background: var(--text-accent);
}

.reveal section img {
  margin: 15px 0px;
  background: rgba(255, 255, 255, 0.12);
  border: 4px solid var(--text-primary);
  box-shadow: var(--shadow-lg);
}

.reveal section img.plain {
  border: 0;
  box-shadow: none;
}

.reveal section img.boring {
  border: 0;
  margin: 0;
  background: transparent;
  box-shadow: none;
}
.reveal section img.center {
  display: block;
  margin: 0 auto;
}

.reveal a img {
  transition: all var(--transition-fast) linear;
}

.reveal a:hover img {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--text-accent);
  box-shadow: var(--shadow-lg);
}

.reveal .controls {
  color: var(--text-accent);
}

.reveal .progress {
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-accent);
}

@media print {
  .backgrounds {
    background-color: var(--bg-primary);
  }
}

.reveal[data-background-transition=zoom] > .backgrounds .slide-background.past,
.reveal > .backgrounds .slide-background.past[data-background-transition=zoom] {
  opacity: 0;
  transform: scale(0.9);
}

.reveal[data-background-transition=zoom] > .backgrounds .slide-background.future,
.reveal > .backgrounds .slide-background.future[data-background-transition=zoom] {
  opacity: 0;
  transform: scale(1.1);
}

.reveal[data-background-transition=zoom] > .backgrounds .slide-background,
.reveal > .backgrounds .slide-background[data-background-transition=zoom] {
  transition: all 800ms cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal .slide-number {
  color: var(--text-secondary);
  background-color: transparent;
}

.reveal .speaker-notes {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}