:root {
  --ink: #111827;
  --muted: #475569;
  --paper: #f8fafc;
  --panel: #ffffff;
  --pico: #087f5b;
  --pico-dark: #065f46;
  --cyan: #0891b2;
  --amber: #f59e0b;
  --red: #dc2626;
  --green: #16a34a;
  --line: #cbd5e1;
}

* {
  box-sizing: border-box;
}

body {
  background:
    radial-gradient(circle at 12% 18%, rgb(8 145 178 / 10%), transparent 24rem),
    radial-gradient(circle at 88% 82%, rgb(8 127 91 / 12%), transparent 28rem),
    var(--paper);
}

.reveal {
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: 34px;
}

.reveal .slides {
  text-align: left;
}

.reveal .slides section {
  padding: 28px 42px;
}

.reveal h1,
.reveal h2,
.reveal h3 {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.035em;
  text-transform: none;
}

.reveal h1 {
  max-width: 10em;
  font-size: 2.4em;
  line-height: 1;
}

.reveal h2 {
  margin: 0 0 0.5em;
  font-size: 1.65em;
  line-height: 1.05;
}

.reveal h3 {
  font-size: 1em;
  letter-spacing: -0.01em;
}

.reveal p,
.reveal li {
  line-height: 1.35;
}

.reveal code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.reveal :not(pre) > code {
  border: 1px solid #bae6fd;
  border-radius: 0.25em;
  background: #ecfeff;
  color: #155e75;
  padding: 0.04em 0.22em;
}

.reveal pre {
  width: 100%;
  margin: 0.5em 0;
  border: 1px solid #1e293b;
  border-radius: 0.45em;
  box-shadow: 0 14px 35px rgb(15 23 42 / 16%);
  font-size: 0.64em;
}

.reveal pre code {
  max-height: 500px;
  padding: 0.85em 1em;
  line-height: 1.38;
}

.reveal ul,
.reveal ol {
  margin-left: 1.1em;
}

.reveal .progress {
  height: 6px;
  color: var(--pico);
}

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

.reveal .slide-number {
  right: 18px;
  bottom: 14px;
  color: var(--muted);
  background: transparent;
  font-size: 15px;
}

.title-slide,
.section-slide {
  min-height: 610px;
  display: flex !important;
  flex-direction: column;
  justify-content: center;
}

.title-slide h1 {
  margin: 0.12em 0 0.3em;
}

.section-slide {
  border-left: 18px solid var(--pico);
}

.section-slide h2 {
  max-width: 12em;
  font-size: 2.2em;
}

.section-number {
  color: var(--pico);
  font-size: 2.8em;
  font-weight: 900;
  line-height: 1;
  opacity: 0.18;
}

.eyebrow {
  margin: 0 0 0.6em;
  color: var(--pico-dark);
  font-size: 0.52em;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.lede {
  max-width: 23em;
  color: var(--muted);
  font-size: 0.92em;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 0.7em;
  align-items: stretch;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--line);
  border-radius: 0.5em;
  background: rgb(255 255 255 / 90%);
  padding: 0.65em 0.75em;
  box-shadow: 0 8px 22px rgb(15 23 42 / 7%);
}

.card h3 {
  margin: 0 0 0.3em;
  color: var(--pico-dark);
}

.card p,
.card li {
  font-size: 0.74em;
}

.card p:last-child,
.card ul:last-child,
.card ol:last-child {
  margin-bottom: 0;
}

.number-card strong {
  display: block;
  margin-bottom: 0.18em;
  color: var(--pico);
  font-size: 1.6em;
}

.callout {
  border-left: 8px solid var(--cyan);
  border-radius: 0.25em;
  background: #ecfeff;
  padding: 0.55em 0.75em;
}

.callout.warning {
  border-left-color: var(--amber);
  background: #fffbeb;
}

.callout.danger {
  border-left-color: var(--red);
  background: #fef2f2;
}

.callout.success {
  border-left-color: var(--green);
  background: #f0fdf4;
}

.callout p {
  margin: 0;
  font-size: 0.8em;
}

.activity {
  display: inline-flex;
  gap: 0.35em;
  align-items: center;
  margin: 0 0 0.55em;
  border: 1px solid #99f6e4;
  border-radius: 99px;
  background: #f0fdfa;
  color: var(--pico-dark);
  padding: 0.22em 0.6em;
  font-size: 0.58em;
  font-weight: 850;
  letter-spacing: 0.035em;
}

.activity.watch {
  border-color: #bfdbfe;
  background: #eff6ff;
  color: #1e40af;
}

.activity.paper {
  border-color: #ddd6fe;
  background: #f5f3ff;
  color: #5b21b6;
}

.activity.build {
  border-color: #fed7aa;
  background: #fff7ed;
  color: #9a3412;
}

.big-question {
  max-width: 20em;
  margin: 0.25em 0;
  color: var(--pico-dark);
  font-size: 1.35em;
  font-weight: 800;
  line-height: 1.15;
}

.flow {
  display: flex;
  gap: 0.4em;
  align-items: center;
  justify-content: center;
  margin: 0.85em 0;
}

.flow-box {
  min-width: 5.7em;
  border: 2px solid var(--line);
  border-radius: 0.45em;
  background: white;
  padding: 0.55em;
  font-weight: 800;
  text-align: center;
}

.flow-arrow {
  color: var(--pico);
  font-size: 1.5em;
  font-weight: 900;
}

.flow.equal-flow .flow-box {
  display: flex;
  flex: 1 1 0;
  align-self: stretch;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.flow.equal-flow .flow-arrow {
  flex: 0 0 auto;
  align-self: center;
}

.diagram-slide {
  padding-top: 18px !important;
}

.diagram-slide h2 {
  margin-bottom: 0.3em;
  font-size: 1.45em;
}

.diagram-header {
  display: flex;
  gap: 1em;
  align-items: end;
  justify-content: space-between;
}

.diagram-frame {
  width: 880px;
  height: 520px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0.4em;
  background: white;
  box-shadow: 0 12px 28px rgb(15 23 42 / 12%);
}

.diagram-frame img {
  display: block;
  width: 100%;
  height: 520px;
  margin: 0;
  object-fit: cover;
  object-position: top;
}

.diagram-frame.contain img {
  object-fit: contain;
  object-position: center;
}

.diagram-link {
  flex: none;
  margin-bottom: 0.65em;
  border: 1px solid #99f6e4;
  border-radius: 99px;
  background: rgb(240 253 250 / 96%);
  color: var(--pico-dark) !important;
  padding: 0.3em 0.65em;
  font-size: 0.48em;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 5px 15px rgb(15 23 42 / 10%);
}

.compact-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.66em;
}

.compact-table th,
.compact-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.42em 0.5em;
  text-align: left;
}

.compact-table th {
  color: var(--pico-dark);
}

.tiny {
  color: var(--muted);
  font-size: 0.52em;
}

.footer {
  position: absolute;
  right: 42px;
  bottom: 18px;
  left: 42px;
  display: flex;
  justify-content: space-between;
  color: #64748b;
  font-size: 0.38em;
}

@media (max-width: 900px) {
  .reveal {
    font-size: 27px;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

@media print {
  .footer {
    display: none;
  }
}