/* ============================================================
   AI Search Diagnostic 101 — GEO is the new SEO
   Visual identity matches the Kyle's AI in Practice diagnostic series.
   ============================================================ */

:root {
  --bg:        #f6f3ec;
  --bg-card:   #ffffff;
  --bg-code:   #1f1d1a;
  --ink:       #1a1714;
  --ink-2:     #4a443c;
  --ink-3:     #7c7468;
  --rule:      #d6cebb;
  --accent:    #c4452d;
  --accent-2:  #b8881c;
  --good:      #2c6f43;
  --bad:       #b8331a;

  --serif:     'Source Serif 4','Tiempos Text',Charter,Georgia,serif;
  --sans:      'IBM Plex Sans','Inter',-apple-system,system-ui,sans-serif;
  --mono:      'JetBrains Mono','IBM Plex Mono','SF Mono',Menlo,monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--bg); color: var(--ink);
  line-height: 1.5; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid currentColor; }
a:hover { color: var(--ink); }
.container { max-width: 1120px; margin: 0 auto; padding: 0 32px; }

/* ─── Header ─────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--rule); padding: 22px 0 18px;
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px); background: rgba(246, 243, 236, 0.92);
}
.site-header .container { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; }
.brand { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-2); }
.brand strong { color: var(--ink); }
.header-cta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.header-cta a { color: var(--accent); border-bottom: 1px solid currentColor; }
.header-cta a:hover { color: var(--ink); }

/* ─── Hero ───────────────────────────────────────────────── */
.hero { padding: 96px 0 72px; border-bottom: 1px solid var(--rule); }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 28px;
}
.hero h1 {
  font-family: var(--serif); font-size: 72px; line-height: 1.03;
  font-weight: 400; letter-spacing: -0.025em;
  margin: 0 0 28px; max-width: 920px; text-wrap: balance;
}
.hero .lede {
  font-family: var(--serif); font-size: 22px; line-height: 1.5;
  color: var(--ink-2); max-width: 800px; margin: 0 0 40px;
}
.hero-meta {
  display: flex; gap: 48px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  color: var(--ink-3); text-transform: uppercase;
}
.hero-meta b { color: var(--ink); font-weight: 600; }

/* ─── Section ────────────────────────────────────────────── */
section.section { padding: 80px 0; border-bottom: 1px solid var(--rule); }
section.section.dim { background: linear-gradient(180deg, var(--bg) 0%, #efeadd 100%); }
.section-label {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--accent-2);
  display: flex; align-items: center; gap: 16px; margin-bottom: 22px;
}
.section-label::before { content: ''; width: 28px; height: 1px; background: var(--accent-2); }
h2.section-h {
  font-family: var(--serif); font-size: 40px; line-height: 1.12;
  letter-spacing: -0.015em; font-weight: 400; margin: 0 0 22px;
  max-width: 880px; text-wrap: balance;
}
.section-dek {
  font-family: var(--serif); font-size: 19px; line-height: 1.55;
  color: var(--ink-2); max-width: 760px; margin: 0 0 44px;
}

/* ─── Executive questions grid ─────────────────────────── */
.exec-questions {
  display: grid; grid-template-columns: 1fr;
  gap: 1px; background: var(--rule);
  border: 1px solid var(--rule); margin: 28px 0 0;
}
.exec-q {
  background: var(--bg-card); padding: 26px 28px;
  display: flex; gap: 20px; align-items: flex-start;
}
.exec-q__num {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.14em; color: var(--accent);
  font-weight: 600; min-width: 28px;
}
.exec-q__body { flex: 1; }
.exec-q__title {
  font-family: var(--serif); font-size: 22px; line-height: 1.18;
  font-weight: 400; letter-spacing: -0.01em;
  color: var(--ink); margin-bottom: 10px;
  text-wrap: balance;
}
.exec-q__desc {
  font-family: var(--sans); font-size: 13.5px; line-height: 1.55;
  color: var(--ink-2);
}

/* ─── Stack table (methodology) ─────────────────────────── */
.stack-table {
  width: 100%; border-collapse: collapse;
  font-family: var(--sans); font-size: 14px;
  background: var(--bg-card); border: 1px solid var(--rule);
}
.stack-table th, .stack-table td {
  padding: 14px 18px; text-align: left;
  border-bottom: 1px solid var(--rule); vertical-align: top;
}
.stack-table th {
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 500;
  border-bottom: 1px solid var(--ink);
}
.stack-table tbody tr:last-child td { border-bottom: 0; }
.stack-table td.layer-n {
  font-family: var(--mono); color: var(--accent);
  font-weight: 600; width: 56px;
}
.stack-table td.layer-src { font-family: var(--sans); font-size: 13px; color: var(--ink); }
.stack-table td.layer-src b { color: var(--accent); font-weight: 600; }
.stack-table td.layer-tool { font-family: var(--mono); font-size: 12px; color: var(--ink-3); white-space: nowrap; }
.stack-foot { margin-top: 22px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--ink-2); }
.stack-foot .sep { margin: 0 14px; color: var(--rule); }

/* ─── Chart card (each interactive Scotts viz) ─────────── */
.chart-card {
  background: var(--bg-card); border: 1px solid var(--rule);
  margin: 28px 0 0; padding: 0; overflow: hidden;
}
.chart-card__hdr {
  padding: 24px 30px 18px;
  border-bottom: 1px solid var(--rule);
}
.chart-card__num {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent);
  font-weight: 600; margin-bottom: 8px;
}
.chart-card__title {
  font-family: var(--serif); font-size: 24px; line-height: 1.2;
  font-weight: 400; letter-spacing: -0.01em;
  color: var(--ink); margin-bottom: 8px;
  text-wrap: balance;
}
.chart-card__sub {
  font-family: var(--sans); font-size: 13px; color: var(--ink-3);
}
.chart-card__sub code {
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-2); background: var(--bg);
  padding: 1px 5px; border: 1px solid var(--rule);
}
.chart-card__body { padding: 28px 30px 8px; }
.chart-card__embed {
  background: #fafaf7;
  padding: 24px 28px 16px;
  border-top: 1px solid var(--rule);
}
.chart-card__callout {
  background: var(--ink); color: #f5efe0;
  padding: 24px 30px;
  border-top: 4px solid var(--accent);
}
.callout-tag {
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent-2); font-weight: 600;
  margin-bottom: 12px;
}
.chart-card__callout p {
  font-family: var(--serif); font-size: 16px; line-height: 1.55;
  color: #d8d2c2; margin: 0 0 10px; max-width: 820px;
}
.chart-card__callout p:last-child { margin-bottom: 0; }
.chart-card__callout p b { color: #fff; font-weight: 600; }
.chart-card__callout p em { color: #fff; font-style: normal; border-bottom: 1px solid var(--accent-2); }

/* ─── CDJ heatmap chart (card 1) ─────────────────────────── */
.cdj-grid { display: flex; flex-direction: column; gap: 8px; }
.cdj-row {
  display: grid; grid-template-columns: 160px 1fr 96px;
  gap: 16px; align-items: center; padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.cdj-row:last-child { border-bottom: 0; }
.cdj-row--head {
  border-bottom: 1px solid var(--ink); padding-bottom: 8px;
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3);
}
.cdj-row--head .cdj-bars { font-family: var(--mono); }
.cdj-row--peak { background: linear-gradient(90deg, #fbeee9 0%, transparent 80%); }
.cdj-stage {
  font-family: var(--sans); font-size: 14px; color: var(--ink); font-weight: 600;
}
.cdj-row--head .cdj-stage { font-weight: 500; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; color: var(--ink-3); text-transform: uppercase; }
.cdj-bars { display: flex; flex-direction: column; gap: 5px; }
.cdj-bar {
  height: 16px; position: relative; min-width: 4px;
  border: 1px solid rgba(0,0,0,0.08);
  display: flex; align-items: center; justify-content: flex-end; padding-right: 8px;
  font-family: var(--mono); font-size: 11px;
  transition: filter 0.15s;
}
.cdj-bar:hover { filter: brightness(1.1); }
.cdj-bar--brand { background: var(--accent); color: #fff; }
.cdj-bar--peer  { background: var(--accent-2); color: var(--ink); opacity: 0.85; }
.cdj-bar__lbl { font-weight: 600; }
.cdj-bar[style*="width: 0%"] { background: var(--rule); color: var(--ink-3); padding-left: 8px; padding-right: 0; justify-content: flex-start; }
.cdj-gap {
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  text-align: right;
}
.cdj-row--head .cdj-gap { font-weight: 500; font-size: 10.5px; }
.cdj-gap--up      { color: var(--good); }
.cdj-gap--neutral { color: var(--ink-3); }
.cdj-legend {
  display: flex; gap: 20px; margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px;
  color: var(--ink-3); letter-spacing: 0.04em;
}
.cdj-bar__dot { display: inline-block; width: 11px; height: 11px; margin-right: 6px; vertical-align: middle; border-radius: 50%; }
.cdj-bar__dot--brand { background: var(--accent); }
.cdj-bar__dot--peer  { background: var(--accent-2); }

/* ─── Source ownership stacked bar (card 2) ─────────────── */
.src-bar {
  display: flex; height: 56px;
  border: 1px solid var(--ink);
  margin: 8px 0 22px;
  font-family: var(--mono); font-size: 13px;
}
.src-seg {
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 600;
  border-right: 1px solid rgba(255,255,255,0.5);
  transition: filter 0.15s;
  position: relative;
}
.src-seg:last-child { border-right: 0; }
.src-seg:hover { filter: brightness(1.1); }
.src-seg--owned     { background: var(--accent); }
.src-seg--affiliate { background: #d97c3f; }
.src-seg--ugc       { background: var(--accent-2); color: var(--ink); }
.src-seg--publisher { background: #8a7a4a; }
.src-seg--retailer  { background: #7c7468; }
.src-seg--other     { background: #c0b8a3; color: var(--ink); }
.src-seg[style*="width: 4%"] { font-size: 11px; }
.src-seg[style*="width: 10%"] { font-size: 11.5px; }
.src-legend {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
  font-family: var(--sans); font-size: 13px;
  color: var(--ink-2);
}
.src-leg {
  display: flex; align-items: baseline; gap: 8px;
}
.src-leg b { color: var(--ink); font-family: var(--mono); font-size: 13px; min-width: 38px; }
.src-leg small { color: var(--ink-3); font-family: var(--mono); font-size: 11px; }
.src-leg__dot { display: inline-block; width: 11px; height: 11px; margin-right: 4px; flex-shrink: 0; }
.src-leg__dot--owned     { background: var(--accent); }
.src-leg__dot--affiliate { background: #d97c3f; }
.src-leg__dot--ugc       { background: var(--accent-2); }
.src-leg__dot--publisher { background: #8a7a4a; }
.src-leg__dot--retailer  { background: #7c7468; }
.src-leg__dot--other     { background: #c0b8a3; }

/* ─── Sentiment fragility bars (card 3) ─────────────────── */
.sent-grid { display: flex; flex-direction: column; gap: 4px; }
.sent-row {
  display: grid; grid-template-columns: 140px 1fr 96px;
  gap: 16px; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--rule);
}
.sent-row:last-child { border-bottom: 0; }
.sent-row--head {
  border-bottom: 1px solid var(--ink); padding-bottom: 8px;
  font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3);
}
.sent-row--focus { background: linear-gradient(90deg, #fbeee9 0%, transparent 80%); }
.sent-brand { font-family: var(--sans); font-size: 13.5px; color: var(--ink); }
.sent-row--focus .sent-brand b { color: var(--accent); font-weight: 700; }
.sent-row--head .sent-brand { font-weight: 500; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }
.sent-bars {
  position: relative; height: 30px; background: var(--bg);
  border: 1px solid var(--rule);
}
.sent-row--head .sent-bars {
  background: transparent; border: 0; height: auto;
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-3);
  display: flex; align-items: center; justify-content: center;
}
.sent-amb, .sent-adv {
  position: absolute; top: 4px; height: 10px;
  border-radius: 1px;
  transition: filter 0.15s;
}
.sent-amb { background: rgba(196, 69, 45, 0.35); top: 5px; }
.sent-adv { background: var(--accent); top: 17px; height: 9px; }
.sent-tick {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 1px; background: var(--ink-3);
}
.sent-row:hover .sent-amb, .sent-row:hover .sent-adv { filter: brightness(1.1); }
.sent-drop { font-family: var(--mono); font-size: 14px; font-weight: 600; text-align: right; }
.sent-row--head .sent-drop { font-weight: 500; font-size: 10.5px; }
.sent-drop--bad { color: var(--accent); }
.sent-drop--mid { color: var(--accent-2); }
.sent-legend {
  display: flex; gap: 22px; margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px; color: var(--ink-3);
  letter-spacing: 0.04em;
}
.sent-leg__dot { display: inline-block; width: 11px; height: 11px; margin-right: 6px; vertical-align: middle; }
.sent-leg__dot--amb { background: rgba(196, 69, 45, 0.35); }
.sent-leg__dot--adv { background: var(--accent); }

/* ─── Hover tooltip (data-tip pattern) ──────────────────── */
[data-tip] { position: relative; cursor: default; }
[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--ink); color: #f5efe0;
  font-family: var(--mono); font-size: 11px;
  padding: 6px 10px; margin-top: 2px;
  z-index: 5; pointer-events: none;
  letter-spacing: 0.02em;
  white-space: normal;
  max-width: 480px;
}

/* ─── CTA card ──────────────────────────────────────────── */
.cta-card {
  background: var(--ink); color: #f5efe0;
  padding: 56px 56px;
  border-left: 4px solid var(--accent);
}
.cta-card__eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent-2);
  margin-bottom: 18px;
}
.cta-card__h {
  font-family: var(--serif); font-size: 44px; line-height: 1.1;
  font-weight: 400; letter-spacing: -0.02em;
  margin: 0 0 18px; color: #fff;
  max-width: 800px; text-wrap: balance;
}
.cta-card__p {
  font-family: var(--serif); font-size: 18px; line-height: 1.55;
  color: #d8d2c2; max-width: 720px; margin: 0 0 30px;
}
.cta-card__actions { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.cta-card__primary {
  background: var(--accent); color: #fff;
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.1em;
  text-transform: uppercase; padding: 16px 26px;
  text-decoration: none; border: 0;
  display: inline-block; font-weight: 600;
}
.cta-card__primary:hover { background: #fff; color: var(--ink); }
.cta-card__secondary {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: #b6ad9a;
  border-bottom: 1px solid #b6ad9a; padding-bottom: 2px;
}
.cta-card__secondary:hover { color: #fff; border-bottom-color: #fff; }

/* ─── Provenance pill ────────────────────────────────────── */
.prov {
  display: inline-block;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px; border: 1px solid var(--rule);
  color: var(--ink-3); margin-right: 10px;
}
.prov.deterministic { color: var(--good); border-color: #b8d3a5; background: #f0f6ea; }

/* ─── Footer ─────────────────────────────────────────────── */
.footer { padding: 56px 0 64px; font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); letter-spacing: 0.06em; }
.footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-tagline { color: var(--ink-3); }
.footer-series .sep { margin: 0 8px; color: var(--rule); }
.footer a { color: var(--ink-2); border: 0; }
.footer a:hover { color: var(--accent); }

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 760px) {
  .hero { padding: 64px 0 48px; }
  .hero h1 { font-size: 42px; }
  .hero .lede { font-size: 17px; }
  .hero-meta { gap: 18px 32px; font-size: 11px; }
  h2.section-h { font-size: 28px; }
  section.section { padding: 56px 0; }
  .container { padding: 0 20px; }
  .site-header { padding: 14px 0 12px; }
  .brand, .header-cta { font-size: 10px; }
  .exec-questions { grid-template-columns: 1fr; }
  .exec-q { padding: 18px 18px; }
  .exec-q__title { font-size: 18px; }
  .stack-table th, .stack-table td { padding: 10px 12px; font-size: 12.5px; }
  .stack-table td.layer-src { font-size: 12px; }
  .chart-card__hdr { padding: 18px 20px 14px; }
  .chart-card__title { font-size: 19px; }
  .chart-card__body { padding: 18px 20px 4px; }
  .chart-card__callout { padding: 18px 20px; }
  .chart-card__callout p { font-size: 14.5px; }
  .cdj-row, .sent-row { grid-template-columns: 100px 1fr 60px; gap: 10px; }
  .cdj-stage, .sent-brand { font-size: 12.5px; }
  .cdj-bar { height: 14px; font-size: 10.5px; }
  .cdj-gap, .sent-drop { font-size: 12px; }
  .src-bar { height: 44px; font-size: 11px; }
  .src-legend { grid-template-columns: 1fr; gap: 6px; }
  .src-leg small { display: block; margin-top: 2px; }
  .cta-card { padding: 36px 28px; }
  .cta-card__h { font-size: 30px; }
  .cta-card__p { font-size: 16px; }
  .cta-card__primary { padding: 14px 20px; font-size: 12px; }
}