/* AI Search Visibility Tracker — hosted demo
   Tokens per RESEARCH-BRIEF.md Lane 2, extended with a Google Fonts pairing
   (Source Serif 4 display / IBM Plex Sans body — no Inter, no Space Grotesk,
   no system stack: this is a hosted demo, not the offline single-file report). */

:root {
  --bg: #FAFAF8;
  --card: #FFFFFF;
  --ink: #16181C;
  --ink-2: #54575C;
  --ink-3: #8A8D92;
  --line: #E4E4E1;
  --accent: #1F5C4A;
  --accent-ink: #FFFFFF;
  --ok: #1B7A43;      --ok-bg: #EAF5EE;
  --gap: #B3261E;      --gap-bg: #FBEAE9;
  --mixed: #8A6D00;    --mixed-bg: #FBF3DE;
  --bar-fill: #C6C8C4;
  --bar-fill-brand: #1F5C4A;
  --focus: #2E6FF2;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06);

  --font-serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-sans: "IBM Plex Sans", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161A; --card: #1B1E23; --ink: #EDEEF0; --ink-2: #ABAFB6; --ink-3: #7A7E85;
    --line: #2C2F35; --accent: #5CB58A; --accent-ink: #0E1310;
    --ok: #4CAF6E; --ok-bg: rgba(76,175,110,0.14);
    --gap: #E5756F; --gap-bg: rgba(229,96,90,0.14);
    --mixed: #D1A94D; --mixed-bg: rgba(209,169,77,0.14);
    --bar-fill: #3A3E45; --bar-fill-brand: #5CB58A;
    --focus: #7AA2FF;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.35);
  }
}
:root[data-theme="dark"] {
  --bg: #14161A; --card: #1B1E23; --ink: #EDEEF0; --ink-2: #ABAFB6; --ink-3: #7A7E85;
  --line: #2C2F35; --accent: #5CB58A; --accent-ink: #0E1310;
  --ok: #4CAF6E; --ok-bg: rgba(76,175,110,0.14);
  --gap: #E5756F; --gap-bg: rgba(229,96,90,0.14);
  --mixed: #D1A94D; --mixed-bg: rgba(209,169,77,0.14);
  --bar-fill: #3A3E45; --bar-fill-brand: #5CB58A;
  --focus: #7AA2FF;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

a { color: var(--accent); }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 3px;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px 96px; }
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; z-index: 100; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Top bar / brand switcher ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.mark {
  font-family: var(--font-serif); font-weight: 700; font-size: 16px; letter-spacing: -0.01em;
  white-space: nowrap;
}
.mark span { color: var(--accent); }
.brand-switcher {
  display: flex; gap: 6px; overflow-x: auto; flex: 1 1 auto; padding: 2px;
  scrollbar-width: thin;
}
.brand-tab {
  font-family: var(--font-sans); font-size: 13px; font-weight: 600; color: var(--ink-2);
  background: transparent; border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 14px; cursor: pointer; white-space: nowrap; transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.brand-tab:hover { border-color: var(--ink-3); color: var(--ink); }
.brand-tab[aria-selected="true"] {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}
.theme-toggle {
  font-size: 13px; font-weight: 600; color: var(--ink-2); background: var(--card);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; cursor: pointer; flex: 0 0 auto;
}
.theme-toggle:hover { border-color: var(--ink-3); color: var(--ink); }

/* ---------- Header ---------- */
header.site-header { padding: 40px 0 8px; }
.kicker {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-3); margin: 0 0 10px;
}
h1.site-title {
  font-family: var(--font-serif); font-size: clamp(26px, 4vw, 34px); font-weight: 700;
  letter-spacing: -0.01em; margin: 0 0 10px; line-height: 1.18;
}
.site-title .brand-domain { color: var(--ink-3); font-weight: 400; font-size: 0.6em; }
.byline {
  color: var(--ink-2); font-size: 13.5px; max-width: 62ch; margin: 0 0 14px; line-height: 1.6;
}
.byline a { text-decoration: underline; text-underline-offset: 2px; }
.meta-line {
  color: var(--ink-3); font-size: 12.5px; display: flex; flex-wrap: wrap; gap: 4px 16px;
  font-variant-numeric: tabular-nums;
}

section { margin-top: 40px; }
h2.section-title {
  font-family: var(--font-serif); font-size: 19px; font-weight: 600; letter-spacing: -0.005em;
  margin: 0 0 4px;
}
.section-sub { color: var(--ink-3); font-size: 13px; margin: 0 0 18px; max-width: 68ch; }

/* ---------- Headline metrics ---------- */
.metric-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
  box-shadow: var(--shadow-card);
}
.metric-tile { background: var(--card); padding: 20px 20px 18px; min-width: 0; }
.metric-label {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink-3); margin: 0 0 10px;
}
.metric-num {
  font-family: var(--font-serif); font-size: clamp(28px, 4vw, 38px); font-weight: 700;
  font-variant-numeric: tabular-nums; line-height: 1; margin: 0 0 8px; color: var(--ink);
}
.metric-num.state-critical { color: var(--gap); }
.metric-num.state-warning { color: var(--mixed); }
.metric-num.state-good { color: var(--ok); }
.metric-gauge {
  height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; margin-bottom: 8px;
}
.metric-gauge > span { display: block; height: 100%; border-radius: 3px; transition: width 0.5s ease; }
.metric-gauge > span.state-critical { background: var(--gap); }
.metric-gauge > span.state-warning { background: var(--mixed); }
.metric-gauge > span.state-good { background: var(--ok); }
.metric-gauge > span.state-neutral { background: var(--accent); }
.metric-note { font-size: 12px; color: var(--ink-3); }
.metric-flag {
  font-size: 11.5px; font-weight: 600; color: var(--mixed); background: var(--mixed-bg);
  border: 1px solid var(--mixed); border-radius: 6px; padding: 4px 8px; margin: 8px 0 0;
}
.metric-flag[hidden] { display: none; }
@media (max-width: 720px) {
  .metric-row { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Gap list (headline section) ---------- */
.gap-panel {
  background: var(--card); border: 1px solid var(--gap); border-radius: 10px; overflow: hidden;
}
.gap-panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 16px 20px; background: var(--gap-bg); border-bottom: 1px solid var(--line);
}
.gap-panel-head strong { font-family: var(--font-serif); font-size: 16px; color: var(--gap); }
.gap-count-badge {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--gap);
  border: 1px solid var(--gap); border-radius: 999px; padding: 3px 10px; background: var(--card);
}
.gap-list { list-style: none; margin: 0; padding: 0; }
.gap-item { border-bottom: 1px solid var(--line); }
.gap-item:last-child { border-bottom: none; }
.gap-item summary {
  list-style: none; cursor: pointer; padding: 14px 20px; display: flex; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.gap-item summary::-webkit-details-marker { display: none; }
.gap-item summary::after {
  content: "→"; margin-left: auto; font-size: 13px; color: var(--ink-3);
  transition: transform 0.15s ease, color 0.15s ease; flex: 0 0 auto;
}
.gap-item[open] summary::after { transform: rotate(90deg); color: var(--accent); }
.gap-prompt { font-weight: 600; flex: 1 1 260px; color: var(--ink); font-size: 14px; }
.gap-tag {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3);
  border: 1px solid var(--line); border-radius: 3px; padding: 2px 6px; flex: 0 0 auto;
}
.gap-domain-count {
  font-size: 12.5px; color: var(--gap); font-weight: 600; white-space: nowrap; flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
}
.gap-body { padding: 0 20px 16px 20px; font-size: 13px; color: var(--ink-2); line-height: 1.7; }
.gap-body .absence {
  display: block; margin-bottom: 8px; color: var(--gap); font-weight: 600;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-family: var(--font-mono); font-size: 12px; border: 1px solid var(--line); border-radius: 5px;
  padding: 3px 8px; color: var(--ink-2); background: var(--bg);
}
.gap-empty {
  padding: 28px 20px; text-align: center; color: var(--ink-2); font-size: 14px;
}
.gap-empty strong { color: var(--ok); display: block; margin-bottom: 4px; font-family: var(--font-serif); font-size: 16px; }

/* ---------- Leaderboard ---------- */
.leaderboard {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 20px 16px;
}
.lb-row {
  display: grid; grid-template-columns: 160px 1fr 56px; align-items: center; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
}
.lb-row:last-child { border-bottom: none; }
.lb-domain {
  font-size: 13px; color: var(--ink); font-weight: 600; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap;
}
.lb-domain.is-brand { color: var(--accent); }
.lb-track { height: 16px; background: var(--bg); border-radius: 3px; overflow: hidden; border: 1px solid var(--line); }
.lb-fill { height: 100%; background: var(--bar-fill); border-radius: 2px; transition: width 0.5s ease; }
.lb-fill.is-brand { background: var(--bar-fill-brand); }
.lb-count { font-family: var(--font-mono); font-size: 13px; text-align: right; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.lb-empty { padding: 20px 0; color: var(--ink-3); font-size: 13.5px; }
@media (max-width: 560px) {
  .lb-row { grid-template-columns: 96px 1fr 40px; gap: 8px; }
  .lb-domain { font-size: 12px; }
}

/* ---------- Prompt detail table ---------- */
.table-controls {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 12px;
}
.filter-btn, .filter-select {
  font-family: var(--font-sans); font-size: 12.5px; font-weight: 600; color: var(--ink-2);
  background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px;
  cursor: pointer;
}
.filter-btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.filter-select { border-radius: 8px; cursor: pointer; }
.table-scroll {
  overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--card);
}
table.prompt-table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 13.5px; }
table.prompt-table th {
  text-align: left; font-weight: 600; color: var(--ink-2); font-size: 11.5px; text-transform: uppercase;
  letter-spacing: 0.04em; padding: 10px 12px; border-bottom: 1px solid var(--line); background: var(--card);
  position: sticky; top: 0;
}
table.prompt-table td { padding: 0 12px; height: 44px; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.prompt-table tbody tr:nth-child(even) { background: color-mix(in srgb, var(--bg) 55%, var(--card)); }
table.prompt-table tbody tr:last-child td { border-bottom: none; }
.pt-query { font-weight: 500; max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pt-domains { color: var(--ink-2); font-size: 12.5px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
.status-dot.yes { background: var(--ok); }
.status-dot.no { background: var(--gap); }
.status-dot.na { background: var(--ink-3); }
.status-dot.error { background: var(--mixed); }
.badge {
  display: inline-block; font-size: 11.5px; font-weight: 600; padding: 2px 8px; border-radius: 4px;
  border: 1px solid;
}
.badge.ok { color: var(--ok); background: var(--ok-bg); border-color: var(--ok); }
.badge.gap { color: var(--gap); background: var(--gap-bg); border-color: var(--gap); }
.badge.mixed { color: var(--mixed); background: var(--mixed-bg); border-color: var(--mixed); }
.row-hidden { display: none; }
.table-empty { padding: 24px; text-align: center; color: var(--ink-3); font-size: 13.5px; }

/* ---------- Methodology ---------- */
.methodology {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 4px 4px;
}
.method-item {
  border-bottom: 1px solid var(--line); padding: 16px 20px;
}
.method-item:last-child { border-bottom: none; }
.method-item h3 {
  font-family: var(--font-sans); font-size: 13.5px; font-weight: 600; margin: 0 0 6px; color: var(--ink);
  display: flex; align-items: center; gap: 8px;
}
.method-item p { margin: 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.65; }
.method-item code {
  font-family: var(--font-mono); font-size: 12px; background: var(--bg); border: 1px solid var(--line);
  border-radius: 4px; padding: 1px 5px;
}
.governor-item { background: var(--ok-bg); border-radius: 8px; margin: 4px; border-bottom: none; }
.governor-item h3 { color: var(--ok); }
.governor-item .cap-line {
  font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: var(--ok); margin-top: 8px;
}

/* ---------- States: fetch error / brand not found ---------- */
.state-panel {
  border: 1px dashed var(--line); border-radius: 10px; padding: 40px 24px; text-align: center;
  color: var(--ink-2);
}
.state-panel strong { display: block; font-family: var(--font-serif); font-size: 18px; color: var(--ink); margin-bottom: 8px; }
.state-panel p { max-width: 48ch; margin: 0 auto; font-size: 13.5px; }

footer.site-footer {
  margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--line);
  color: var(--ink-3); font-size: 12.5px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
footer.site-footer a { color: var(--ink-2); }

@media (max-width: 420px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  .topbar-inner { padding: 12px 16px; }
}