:root {
  --text-color: rgba(255,255,255,0.88);
  --muted-color: rgba(255,255,255,0.45);
  --surface-bg: rgba(30,30,40,0.95);
  --border-color: rgba(255,255,255,0.1);
  --axis-color: rgba(255,255,255,0.15);
  --tick-color: rgba(255,255,255,0.5);
  --grid-color: rgba(255,255,255,0.06);
  --primary-color: #7c6ff7;
  --danger: #e05252;
}

html { data-theme: dark; }

.reveal {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

.reveal h1, .reveal h2, .reveal h3 {
  font-weight: 700;
  text-transform: none;
  letter-spacing: -0.02em;
}

.reveal .slides section {
  top: 0 !important;
  padding-top: 5px;
}

.reveal .slides section.center-slide {
  top: auto !important;
  display: flex !important;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  padding-top: 0;
}

.reveal h2 {
  font-size: 1.6em;
  margin-top: 0;
  margin-bottom: 0.3em;
}

.reveal h3 {
  font-size: 1.15em;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
  margin-bottom: 0.4em;
}

.reveal .subtitle {
  font-size: 0.55em;
  font-weight: 400;
  color: rgba(255,255,255,0.5);
  margin-top: 0.3em;
}

.reveal .section-label {
  font-size: 0.5em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #7c6ff7;
  margin-bottom: 0.1em;
}

.reveal ul {
  list-style: none;
  padding-left: 0;
  font-size: 0.75em;
}

.reveal ul li {
  margin-bottom: 0.5em;
  padding-left: 1.2em;
  position: relative;
}

.reveal ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #7c6ff7;
}

.reveal .accent {
  color: #7c6ff7;
}

.reveal .highlight {
  color: #f0c674;
}

.reveal .danger {
  color: #e05252;
}

.reveal .big-number {
  font-size: 3em;
  font-weight: 800;
  line-height: 1.1;
  color: #7c6ff7;
}

.reveal .big-number .unit {
  font-size: 0.35em;
  font-weight: 500;
  color: rgba(255,255,255,0.5);
}

.stat-row {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin: 30px 0;
}

.stat-box {
  text-align: center;
}

.stat-box .num {
  font-size: 2.2em;
  font-weight: 800;
  color: #7c6ff7;
  line-height: 1.1;
}

.stat-box .label {
  font-size: 0.55em;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  text-align: left;
  align-items: start;
}

.two-col .col {
  padding: 0;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: start;
  font-size: 0.52em;
  text-align: left;
}

.before-after .arrow {
  font-size: 2em;
  color: #7c6ff7;
  align-self: center;
  padding-top: 20px;
}

.before-after .panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 18px 20px;
  line-height: 1.5;
}

.before-after .panel.bad {
  border-color: rgba(224,82,82,0.3);
}

.before-after .panel.good {
  border-color: rgba(124,111,247,0.3);
}

.before-after .panel-title {
  font-weight: 700;
  font-size: 1.1em;
  margin-bottom: 8px;
}

.before-after .panel.bad .panel-title {
  color: #e05252;
}

.before-after .panel.good .panel-title {
  color: #7c6ff7;
}

.chart-frame {
  width: 100%;
  height: 480px;
  border: none;
  border-radius: 8px;
  background: transparent;
}

.chart-frame.tall {
  height: 540px;
}

.chart-frame.short {
  height: 400px;
}

.img-contain {
  max-width: 100%;
  max-height: 480px;
  border-radius: 8px;
}

.recipe-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 0.75em;
  margin: 30px 0;
}

.recipe-diagram .box {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 16px 22px;
  text-align: center;
  min-width: 120px;
}

.recipe-diagram .box.result {
  border-color: rgba(124,111,247,0.4);
  background: rgba(124,111,247,0.08);
}

.recipe-diagram .plus {
  font-size: 1.8em;
  color: rgba(255,255,255,0.3);
}

.recipe-diagram .equals {
  font-size: 1.8em;
  color: #7c6ff7;
}

.takeaway-list {
  font-size: 0.65em;
  max-width: 700px;
  margin: 0 auto;
}

.takeaway-list li {
  margin-bottom: 0.7em;
  line-height: 1.5;
}

.qr-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-top: 20px;
}

.surprise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  font-size: 0.6em;
  text-align: left;
}

.surprise-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 20px;
}

.surprise-card .icon {
  font-size: 1.6em;
  margin-bottom: 8px;
}

.surprise-card h4 {
  font-size: 1.05em;
  margin: 0 0 8px 0;
  color: #f0c674;
}

.surprise-card p {
  margin: 0;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}