/* Adtech / Programmatic Ecosystem — Dedicated CSS */

:root {
  /* Advertiser (Orange) */
  --at-advertiser-bg: #fff7ed;
  --at-advertiser-border: #fdba74;
  --at-advertiser-text: #9a3412;

  /* DSP / Demand (Blue) */
  --at-demand-bg: #eff6ff;
  --at-demand-border: #93c5fd;
  --at-demand-text: #1e40af;

  /* Exchange (Indigo) */
  --at-exchange-bg: #eef2ff;
  --at-exchange-border: #a5b4fc;
  --at-exchange-text: #3730a3;

  /* SSP / Supply (Green) */
  --at-supply-bg: #f0fdf4;
  --at-supply-border: #86efac;
  --at-supply-text: #15803d;

  /* Publisher (Teal) */
  --at-publisher-bg: #f0fdfa;
  --at-publisher-border: #5eead4;
  --at-publisher-text: #0f766e;

  /* Verification (Purple) */
  --at-verify-bg: #faf5ff;
  --at-verify-border: #d8b4fe;
  --at-verify-text: #7e22ce;

  /* Data (Amber) */
  --at-data-bg: #fffbeb;
  --at-data-border: #fcd34d;
  --at-data-text: #b45309;

  /* Neutral */
  --at-card-bg: #ffffff;
  --at-card-border: #e2e8f0;
  --at-heading: #0f172a;
  --at-body: #475569;
  --at-muted: #64748b;
  --at-faint: #94a3b8;
}

.dark {
  --at-advertiser-bg: #431407;
  --at-advertiser-border: #c2410c;
  --at-advertiser-text: #fdba74;

  --at-demand-bg: #172554;
  --at-demand-border: #3b82f6;
  --at-demand-text: #93c5fd;

  --at-exchange-bg: #1e1b4b;
  --at-exchange-border: #6366f1;
  --at-exchange-text: #c7d2fe;

  --at-supply-bg: #052e16;
  --at-supply-border: #16a34a;
  --at-supply-text: #86efac;

  --at-publisher-bg: #042f2e;
  --at-publisher-border: #14b8a6;
  --at-publisher-text: #99f6e4;

  --at-verify-bg: #2e1065;
  --at-verify-border: #7e22ce;
  --at-verify-text: #d8b4fe;

  --at-data-bg: #422006;
  --at-data-border: #ca8a04;
  --at-data-text: #fde047;

  --at-card-bg: var(--color-bg-secondary);
  --at-card-border: #334155;
  --at-heading: #f1f5f9;
  --at-body: #94a3b8;
  --at-muted: #94a3b8;
  --at-faint: #64748b;
}

html { scroll-padding-top: 120px; }
.at-page { max-width: 1200px; margin: 0 auto; padding: 40px 0; }
.at-section { padding-bottom: 12px; }
.at-divider { border: none; border-top: 1px solid var(--at-card-border); margin: 48px 0; }

.section-header { margin-bottom: 28px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: var(--at-heading);
  color: var(--at-card-bg);
  border: 1px solid var(--at-heading);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.section-header h2 { font-size: 26px; font-weight: 700; color: var(--at-heading); }
.section-header p { color: var(--at-muted); margin-top: 6px; font-size: 15px; max-width: 760px; }

.at-callout {
  background: color-mix(in srgb, var(--at-data-bg) 75%, white);
  border: 2px solid var(--at-data-border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-top: 18px;
}
.at-callout p { color: var(--at-data-text); font-size: 13px; line-height: 1.6; }
.at-callout strong { color: var(--at-heading); }

/* Subnav */
.at-subnav {
  position: sticky;
  top: 64px;
  z-index: 40;
  background: var(--color-bg-secondary, #f8fafc);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border, #e2e8f0);
}
.at-subnav-link {
  color: var(--color-text-secondary, #64748b);
  text-decoration: none;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
}
.at-subnav-link:hover {
  background: var(--color-bg-tertiary, #f1f5f9);
  color: var(--color-text-primary, #0f172a);
}
.at-subnav-link.active {
  background: var(--color-accent, #2E8ECE);
  color: white;
  font-weight: 600;
}

/* Diagram 1: Horizontal relay map */
.at-relay {
  border: 2px solid var(--at-card-border);
  border-radius: 14px;
  background: var(--at-card-bg);
  padding: 14px;
}
.at-relay-grid {
  display: grid;
  grid-template-columns: 1fr 80px 1.2fr 80px 1fr;
  gap: 10px;
  align-items: stretch;
}
.at-relay-col {
  border: 2px solid;
  border-radius: 12px;
  padding: 12px;
}
.at-relay-col h3 { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.at-relay-col p { font-size: 12px; color: var(--at-body); margin-bottom: 8px; }
.at-relay-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--at-faint);
  font-weight: 700;
}
.at-relay-mid {
  display: grid;
  gap: 10px;
}
.at-layer {
  border: 2px solid;
  border-radius: 12px;
  padding: 14px;
  background: var(--at-card-bg);
}
.at-layer h3 { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.at-layer p { font-size: 13px; color: var(--at-body); margin-bottom: 8px; }
.at-pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.at-pill {
  font-size: 11px;
  border: 1px solid;
  border-radius: 20px;
  padding: 4px 10px;
  font-weight: 600;
}
@media (max-width: 980px) {
  .at-relay-grid { grid-template-columns: 1fr; }
  .at-relay-arrow { transform: rotate(90deg); font-size: 24px; }
}
.at-advertiser { background: var(--at-advertiser-bg); border-color: var(--at-advertiser-border); }
.at-advertiser h3, .at-advertiser .at-pill { color: var(--at-advertiser-text); border-color: var(--at-advertiser-border); }
.at-demand { background: var(--at-demand-bg); border-color: var(--at-demand-border); }
.at-demand h3, .at-demand .at-pill { color: var(--at-demand-text); border-color: var(--at-demand-border); }
.at-exchange { background: var(--at-exchange-bg); border-color: var(--at-exchange-border); }
.at-exchange h3, .at-exchange .at-pill { color: var(--at-exchange-text); border-color: var(--at-exchange-border); }
.at-supply { background: var(--at-supply-bg); border-color: var(--at-supply-border); }
.at-supply h3, .at-supply .at-pill { color: var(--at-supply-text); border-color: var(--at-supply-border); }
.at-publisher { background: var(--at-publisher-bg); border-color: var(--at-publisher-border); }
.at-publisher h3, .at-publisher .at-pill { color: var(--at-publisher-text); border-color: var(--at-publisher-border); }
.at-verify { background: var(--at-verify-bg); border-color: var(--at-verify-border); }
.at-verify h3, .at-verify .at-pill { color: var(--at-verify-text); border-color: var(--at-verify-border); }

/* Diagram 2: RTB */
.at-sequence {
  background: var(--at-card-bg);
  border: 2px solid var(--at-card-border);
  border-radius: 14px;
  overflow: hidden;
}
.at-participants {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  background: #0f172a;
  gap: 1px;
}
.at-participant {
  color: #e2e8f0;
  text-align: center;
  font-size: 12px;
  padding: 12px 8px;
  font-weight: 600;
}
.at-step-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 6px 14px;
  background: color-mix(in srgb, var(--at-card-border) 45%, white);
  color: var(--at-muted);
  border-bottom: 1px solid var(--at-card-border);
}
.at-step {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  min-height: 52px;
  border-bottom: 1px solid var(--at-card-border);
}
.at-step:last-child { border-bottom: none; }
.at-cell {
  padding: 10px 8px;
  font-size: 12px;
  color: var(--at-body);
  border-right: 1px dashed var(--at-card-border);
}
.at-cell:last-child { border-right: none; }
.at-cell.active { font-weight: 600; }
.at-cell.user { background: color-mix(in srgb, var(--at-publisher-bg) 65%, white); color: var(--at-publisher-text); }
.at-cell.pub { background: color-mix(in srgb, var(--at-publisher-bg) 75%, white); color: var(--at-publisher-text); }
.at-cell.ssp { background: color-mix(in srgb, var(--at-supply-bg) 75%, white); color: var(--at-supply-text); }
.at-cell.ex { background: color-mix(in srgb, var(--at-exchange-bg) 75%, white); color: var(--at-exchange-text); }
.at-cell.dsp { background: color-mix(in srgb, var(--at-demand-bg) 75%, white); color: var(--at-demand-text); }
.at-cell.adv { background: color-mix(in srgb, var(--at-advertiser-bg) 75%, white); color: var(--at-advertiser-text); }

.at-rtb-table-wrap { margin-top: 14px; overflow-x: auto; }
.at-rtb-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.at-rtb-table th, .at-rtb-table td { border: 1px solid var(--at-card-border); padding: 8px; text-align: left; color: var(--at-body); }
.at-rtb-table th { background: color-mix(in srgb, var(--at-card-border) 45%, white); color: var(--at-heading); }

/* Diagram 3 + 6 cards */
.at-card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 1000px) { .at-card-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .at-card-grid-4 { grid-template-columns: 1fr; } }
.at-model-card { background: var(--at-card-bg); border: 2px solid var(--at-card-border); border-radius: 12px; overflow: hidden; }
.at-model-head { padding: 12px 14px; font-size: 13px; font-weight: 700; border-bottom: 2px solid var(--at-card-border); }
.at-model-body { padding: 12px 14px; }
.at-model-body p { font-size: 12px; color: var(--at-body); margin-bottom: 8px; }
.at-model-body p strong { color: var(--at-heading); }
.at-timeline { margin-top: 16px; border: 2px solid var(--at-card-border); border-radius: 12px; padding: 12px; background: var(--at-card-bg); }
.at-tl-row { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--at-card-border); }
.at-tl-row:last-child { border-bottom: none; }
.at-tl-year { font-size: 12px; font-weight: 700; color: var(--at-heading); }
.at-tl-desc { font-size: 12px; color: var(--at-body); }

/* Diagram 4 revenue */
.at-toggle { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.at-toggle button {
  border: 2px solid var(--at-card-border);
  background: color-mix(in srgb, var(--at-card-border) 30%, white);
  color: var(--at-heading);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.at-toggle button.active { background: #0f172a; color: #f8fafc; border-color: #0f172a; }
.at-sankey { background: var(--at-card-bg); border: 2px solid var(--at-card-border); border-radius: 14px; padding: 14px; overflow: hidden; }
.at-flow-row { display: grid; grid-template-columns: 180px minmax(140px, 1fr) 120px; gap: 10px; align-items: center; margin-bottom: 10px; }
.at-flow-row:last-child { margin-bottom: 0; }
.at-flow-label { font-size: 12px; color: var(--at-heading); font-weight: 600; }
.at-flow-bar { height: 20px; border-radius: 20px; min-width: 4px; max-width: 100%; }
.at-flow-value { font-size: 12px; color: var(--at-body); font-weight: 600; text-align: right; white-space: nowrap; }
@media (max-width: 760px) {
  .at-flow-row { grid-template-columns: 1fr; gap: 6px; }
  .at-flow-value { text-align: left; }
}

/* PM parity blocks (components deepening) */
.pm-subhead { font-size: 20px; font-weight: 700; color: var(--at-heading); margin: 30px 0 12px; }
.pm-grid { display: grid; gap: 12px; }
.pm-grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) { .pm-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .pm-grid-4 { grid-template-columns: 1fr; } }
.pm-card { border: 2px solid var(--at-card-border); border-radius: 12px; background: var(--at-card-bg); padding: 12px; }
.pm-card h4 { font-size: 14px; font-weight: 700; color: var(--at-heading); margin-bottom: 6px; }
.pm-card p { font-size: 12px; color: var(--at-body); }
.pm-matrix-wrap { border: 2px solid var(--at-card-border); border-radius: 12px; overflow: auto; background: var(--at-card-bg); }
.pm-matrix { width: 100%; border-collapse: collapse; min-width: 760px; }
.pm-matrix th, .pm-matrix td { border: 1px solid var(--at-card-border); padding: 10px; font-size: 12px; text-align: left; color: var(--at-body); vertical-align: top; }
.pm-matrix th { background: color-mix(in srgb, var(--at-card-border) 45%, white); color: var(--at-heading); font-weight: 700; }
.pm-scenarios { display: grid; gap: 10px; }
.pm-scenario { border: 2px solid var(--at-card-border); border-radius: 12px; background: var(--at-card-bg); padding: 12px; }
.pm-scenario h4 { font-size: 14px; font-weight: 700; color: var(--at-heading); margin-bottom: 6px; }
.pm-scenario p { font-size: 12px; color: var(--at-body); }

/* Diagram 5 */
.at-perspectives { display: grid; grid-template-columns: 1fr 120px 1fr; gap: 12px; align-items: stretch; }
@media (max-width: 900px) { .at-perspectives { grid-template-columns: 1fr; } }
.at-view {
  border: 2px solid var(--at-card-border);
  border-radius: 12px;
  padding: 14px;
  background: var(--at-card-bg);
}
.at-view h3 { font-size: 16px; font-weight: 700; color: var(--at-heading); margin-bottom: 8px; }
.at-view ul { margin: 0; padding-left: 18px; }
.at-view li { font-size: 12px; color: var(--at-body); margin-bottom: 6px; }
.at-mid {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--at-muted);
  font-weight: 700;
  border: 2px dashed var(--at-card-border);
  border-radius: 12px;
  padding: 12px;
  text-align: center;
}