.demo-page {
  --demo-blue: #2457A7;
  --demo-green: #287A55;
  --demo-charcoal: #2D3540;
  --demo-gold: #A86B16;
}

.demo-hero {
  padding: 92px 0 104px;
  background:
    linear-gradient(90deg, rgba(36,87,167,0.07), transparent 38%),
    linear-gradient(180deg, var(--bg), var(--bg-band));
}

.demo-hero-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.demo-copy .lead {
  max-width: 620px;
  margin: 26px 0 36px;
}

.demo-copy .h-mega {
  font-size: clamp(42px, 5.2vw, 74px);
  max-width: 11ch;
}

.demo-map {
  min-height: 470px;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: 18px;
  box-shadow: var(--shadow-panel);
  padding: 28px;
  display: grid;
  grid-template-columns: 0.75fr 1.1fr 0.75fr;
  gap: 18px;
  align-items: center;
  position: relative;
}

.demo-map::before,
.demo-map::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 16%;
  height: 1px;
  background: var(--hairline);
}

.demo-map::before { left: 27%; }
.demo-map::after { right: 27%; }

.map-column,
.map-core {
  position: relative;
  z-index: 1;
}

.map-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 14px;
}

.source-chip,
.dest-chip {
  display: flex;
  align-items: center;
  min-height: 44px;
  border-radius: 10px;
  padding: 0 14px;
  margin-bottom: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 12px 26px -20px rgba(18,17,15,0.55);
}

.source-chip.meta { background: var(--demo-blue); }
.source-chip.google { background: #B94032; }
.source-chip.tiktok { background: var(--demo-charcoal); }
.source-chip.csv { background: var(--demo-gold); }

.dest-chip {
  background: var(--bg-band);
  color: var(--ink);
  border: 1px solid var(--hairline);
}

.core-box {
  min-height: 170px;
  border-radius: 16px;
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(138,31,44,0.12), rgba(36,87,167,0.08)),
    var(--bg-card);
  border: 1px solid rgba(138,31,44,0.35);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.core-box strong {
  font-size: 25px;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.core-box span {
  color: var(--ash);
  font-family: var(--font-mono);
  font-size: 12px;
}

.walkthrough {
  margin-top: 48px;
}

.stage-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.stage-tab {
  min-height: 42px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0 18px;
  background: var(--bg-card);
  color: var(--ash);
  font-family: var(--font-sans);
  font-size: 14px;
  cursor: pointer;
  transition: border-color .18s ease, color .18s ease, background .18s ease;
}

.stage-tab.active,
.stage-tab:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.demo-stage {
  display: grid;
  grid-template-columns: 290px 1fr;
  min-height: 560px;
  border: 1px solid var(--hairline);
  border-radius: 18px;
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-panel);
}

.demo-sidebar {
  background: #F6F2EC;
  border-right: 1px solid var(--hairline);
  padding: 24px;
}

.mini-step {
  border-left: 2px solid var(--hairline);
  padding: 0 0 28px 18px;
  color: var(--mute);
}

.mini-step:last-child {
  padding-bottom: 0;
}

.mini-step span {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent-text);
  margin-bottom: 8px;
}

.mini-step strong {
  display: block;
  color: var(--ink);
  font-size: 17px;
  margin-bottom: 5px;
}

.mini-step p {
  font-size: 13.5px;
  line-height: 1.48;
}

.pane {
  display: none;
  padding: 28px;
}

.pane.active {
  display: block;
}

.surface-bar {
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 18px;
  margin-bottom: 22px;
  font-weight: 600;
}

.verified {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--demo-green);
  border: 1px solid rgba(40,122,85,0.35);
  border-radius: 999px;
  padding: 6px 10px;
}

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}

.kpi-strip div,
.proof-card {
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 18px;
  background: var(--bg-card);
}

.kpi-strip span,
.proof-card span,
.panel-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 8px;
}

.kpi-strip strong {
  font-size: 28px;
  letter-spacing: -0.02em;
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.bar-chart {
  height: 280px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px 22px 42px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: 14px;
  background:
    linear-gradient(to top, rgba(18,17,15,0.08) 1px, transparent 1px) 0 0 / 100% 25%;
}

.bar-chart span {
  display: block;
  border-radius: 9px 9px 3px 3px;
  background: linear-gradient(180deg, var(--demo-blue), var(--accent));
  position: relative;
}

.bar-chart span::after {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  bottom: -28px;
  transform: translateX(-50%);
  color: var(--mute);
  font-family: var(--font-mono);
  font-size: 10px;
}

.insight-panel {
  border: 1px solid rgba(138,31,44,0.35);
  border-radius: 12px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(138,31,44,0.08), rgba(40,122,85,0.06));
}

.insight-panel strong {
  display: block;
  font-size: 22px;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.insight-panel p {
  color: var(--ash);
  line-height: 1.58;
}

.sheet-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: 12px;
}

.sheet-table th,
.sheet-table td {
  text-align: left;
  padding: 16px 14px;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 14px;
}

.sheet-table th {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
  background: var(--bg-band);
}

.sheet-table td {
  color: var(--ash);
}

.sheet-table tr:last-child td {
  border-bottom: 0;
}

.code-card {
  white-space: pre-wrap;
  background: #171A1F;
  color: #EFF3F6;
  border-radius: 12px;
  padding: 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.62;
  margin-bottom: 16px;
}

.code-card.response {
  background: #F3F6F1;
  color: var(--demo-green);
  border: 1px solid rgba(40,122,85,0.25);
}

.chat-demo {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 760px;
}

.chat-row {
  border-radius: 16px;
  padding: 18px 20px;
  line-height: 1.55;
}

.chat-row.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  max-width: 58%;
}

.chat-row.assistant {
  align-self: flex-start;
  background: var(--bg-band);
  color: var(--ink);
  max-width: 74%;
  border: 1px solid var(--hairline);
}

.demo-proof {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.proof-card strong {
  display: block;
  font-size: 24px;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.proof-card p {
  color: var(--ash);
  line-height: 1.58;
}

@media (max-width: 980px) {
  .demo-hero-grid,
  .demo-proof,
  .demo-stage {
    grid-template-columns: 1fr;
  }

  .demo-map {
    grid-template-columns: 1fr;
  }

  .demo-map::before,
  .demo-map::after {
    display: none;
  }

  .demo-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .mini-step {
    border-left: 0;
    padding: 0;
  }

  .chart-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .demo-hero {
    padding: 58px 0 72px;
  }

  .demo-map,
  .pane {
    padding: 20px;
  }

  .kpi-strip,
  .demo-sidebar {
    grid-template-columns: 1fr;
  }

  .chat-row.user,
  .chat-row.assistant {
    max-width: 100%;
  }

  .stage-tabs {
    flex-direction: column;
  }

  .stage-tab {
    width: 100%;
  }
}