:root {
  --black: #000100ff;
  --cool-steel: #a1a6b4ff;
  --light-blue: #94c5ccff;
  --pale-sky: #b4d2e7ff;
  --bright-snow: #f8f8f8ff;
  --ink: var(--black);
  --muted: #6e7380;
  --line: #d5e2ec;
  --bg: var(--bright-snow);
  --panel: #ffffff;
  --panel-2: #eef4f8;
  --accent: var(--light-blue);
  --accent-text: #2f6f78;
  --pos: #2f6f78;
  --neg: var(--black);
  --warn: #5c6573;
  --focus: var(--light-blue);
  --brand: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --ui: "IBM Plex Sans", "Helvetica Neue", Helvetica, sans-serif;
  --page-max: 1120px;
  --page-pad: clamp(24px, 5.5vw, 72px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--ui);
  font-feature-settings: "ss01" 1, "kern" 1;
  background:
    radial-gradient(120% 80% at 12% -10%, rgba(148, 197, 204, 0.28), transparent 55%),
    radial-gradient(90% 60% at 100% 0%, rgba(180, 210, 231, 0.35), transparent 50%),
    linear-gradient(180deg, #f3f7fa 0%, var(--bright-snow) 42%, #eef3f7 100%);
  background-attachment: fixed;
  color: var(--ink);
  min-height: 100vh;
  letter-spacing: -0.011em;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip-link:focus {
  left: 12px;
  background: var(--black);
  color: var(--bright-snow);
  padding: 8px 12px;
  z-index: 20;
}

/* —— Capprs site chrome —— */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px max(var(--page-pad), calc((100% - var(--page-max)) / 2));
  background: var(--black);
  color: var(--bright-snow);
  border-bottom: 2px solid var(--light-blue);
}
.site-mark {
  font-family: var(--brand);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--bright-snow);
  text-decoration: none;
  line-height: 1;
}
.site-mark:hover, .site-mark:focus-visible { color: var(--pale-sky); }
.site-nav {
  display: flex;
  gap: 18px;
  align-items: center;
}
.site-nav a {
  color: var(--pale-sky);
  text-decoration: none;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--bright-snow); }
.site-nav a[aria-current="page"] {
  color: var(--bright-snow);
  border-bottom-color: var(--light-blue);
}

/* —— Product (tool) bar —— */
.product-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "identity meta"
    "nav nav";
  gap: 8px 24px;
  align-items: end;
  margin: 0;
  padding: 18px max(var(--page-pad), calc((100% - var(--page-max)) / 2)) 14px;
  background: rgba(255, 255, 255, 0.72);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.product-identity { grid-area: identity; }
.product-eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
}
.product-title {
  margin: 4px 0 0;
  font-family: var(--brand);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--ink);
}
.product-nav {
  grid-area: nav;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 4px;
}
.product-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}
.product-nav a:hover, .product-nav a:focus-visible { color: var(--ink); }
.product-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--light-blue);
}
.product-meta {
  grid-area: meta;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
  letter-spacing: 0.02em;
  max-width: 280px;
  justify-self: end;
}

/* —— Capprs home —— */
.page-home .site-header {
  position: relative;
  z-index: 2;
}
.home-hero {
  min-height: calc(100vh - 54px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px var(--page-pad) 64px;
  max-width: var(--page-max);
  margin: 0 auto;
  position: relative;
  width: 100%;
}
.home-hero::before {
  content: "";
  position: absolute;
  inset: 8% -8% auto auto;
  width: min(52vw, 420px);
  height: min(52vw, 420px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(148, 197, 204, 0.45), transparent 70%);
  pointer-events: none;
  animation: home-glow 8s ease-in-out infinite alternate;
}
.home-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-text);
  opacity: 0;
  animation: home-rise 0.7s ease forwards 0.05s;
}
.home-brand {
  margin: 0;
  font-family: var(--brand);
  font-size: clamp(64px, 14vw, 120px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.92;
  color: var(--ink);
  position: relative;
  opacity: 0;
  animation: home-rise 0.8s ease forwards 0.12s;
}
.home-lead {
  margin: 22px 0 0;
  max-width: 34rem;
  font-size: clamp(17px, 2.4vw, 20px);
  line-height: 1.45;
  color: #2a2c31;
  opacity: 0;
  animation: home-rise 0.8s ease forwards 0.22s;
}
.home-actions {
  margin: 28px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: home-rise 0.8s ease forwards 0.34s;
}
.btn-primary {
  display: inline-block;
  padding: 12px 20px;
  background: var(--black);
  color: var(--bright-snow);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--black);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
  transform: translateY(-1px);
}
.btn-secondary {
  display: inline-block;
  padding: 12px 20px;
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.55);
  transform: translateY(-1px);
}
.home-actions .btn-secondary { margin-left: 0; }
.home-tools {
  padding: 0 var(--page-pad) 48px;
  max-width: var(--page-max);
  margin: 0 auto;
  width: 100%;
}
.home-tools h2 {
  margin: 0 0 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-text);
}
.tool-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.tool-list li {
  border-bottom: 1px solid var(--line);
}
.tool-list a {
  display: grid;
  gap: 4px;
  padding: 18px 0;
  text-decoration: none;
  color: inherit;
  transition: padding-left 0.2s ease;
}
.tool-list a:hover, .tool-list a:focus-visible {
  padding-left: 8px;
}
.tool-name {
  font-family: var(--brand);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.tool-desc {
  font-size: 14px;
  line-height: 1.45;
  color: var(--muted);
}
.tool-soon {
  padding: 18px 0;
  opacity: 0.55;
}
.tool-soon .tool-name { font-size: 18px; }

@keyframes home-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes home-glow {
  from { transform: translate(0, 0) scale(1); opacity: 0.85; }
  to { transform: translate(-18px, 12px) scale(1.06); opacity: 1; }
}

.disclaimer, .status, .filters, footer, .site-footer, .status-stack, main#projections, main#stats {
  width: min(var(--page-max), calc(100% - (2 * var(--page-pad))));
  margin: 16px auto;
  box-sizing: border-box;
}
#table-wrap {
  width: 100%;
  margin: 0;
  box-sizing: border-box;
}
.disclaimer, .status {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.5;
}
.status.loading { border-left: 3px solid var(--light-blue); }
.status.empty, .status.unavailable { border-left: 3px solid var(--cool-steel); }
.status.error { border-left: 3px solid var(--black); }
.status.stale { border-left: 3px solid var(--pale-sky); }
.status.ok { border-left: 3px solid var(--light-blue); }

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px 16px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}
.meta-grid strong { color: var(--ink); font-weight: 600; }

.filters {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}
.history-help {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  line-height: 1.45;
}
.history-filter {
  grid-column: 1 / -1;
  margin: 0;
  padding: 8px 10px 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
}
.history-filter legend {
  padding: 0 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.history-filter label {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
}
.history-filter input[type="radio"] {
  width: 14px;
  height: 14px;
  margin: 0;
  padding: 0;
  accent-color: var(--light-blue);
  background: none;
  border: none;
  flex: 0 0 auto;
}
.view-banner {
  margin: 0 0 10px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--light-blue);
  background: var(--panel);
  font-size: 13px;
}
.filters > label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
input:not([type="checkbox"]):not([type="radio"]), select, button {
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 8px 10px;
}
input:not([type="checkbox"]):focus, select:focus, button:focus, input[type="checkbox"]:focus-visible, input[type="radio"]:focus-visible {
  outline: 2px solid var(--light-blue);
  outline-offset: 1px;
}
button {
  cursor: pointer;
  font-weight: 500;
}
button:hover {
  border-color: var(--cool-steel);
  background: var(--panel-2);
}
.book-filter {
  grid-column: 1 / -1;
  margin: 0;
  padding: 8px 10px 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  min-width: 0;
}
.book-filter legend {
  padding: 0 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.book-filter-help {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
  line-height: 1.4;
}
.book-filter-actions {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}
.book-filter-actions button {
  padding: 5px 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.book-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.book-checks label {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  font-size: 13px;
  color: var(--ink);
  background: var(--bright-snow);
  border: 1px solid var(--line);
  padding: 4px 10px 4px 8px;
  cursor: pointer;
}
.book-checks label:has(input:checked) {
  border-color: var(--light-blue);
  background: var(--panel-2);
}
.book-checks input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  padding: 0;
  accent-color: var(--light-blue);
  background: none;
  border: none;
  flex: 0 0 auto;
}

.table-scroll { overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 980px;
}
table.stats-table { min-width: 1280px; }
th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 14px;
  vertical-align: middle;
}
th {
  position: sticky;
  top: 0;
  background: var(--black);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pale-sky);
  cursor: pointer;
}
th[aria-sort="ascending"]::after { content: " ↑"; color: var(--light-blue); }
th[aria-sort="descending"]::after { content: " ↓"; color: var(--light-blue); }
tbody tr[data-expandable] { cursor: pointer; }
tbody tr[data-expandable]:hover { background: #eef6f8; }
tbody tr.active { background: var(--panel-2); }
.num { font-variant-numeric: tabular-nums; text-align: right; font-weight: 500; }
.pos-chip, .warn-chip {
  display: inline-block;
  padding: 2px 7px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.pos-chip { background: var(--panel-2); color: var(--ink); }
.warn-chip {
  background: var(--pale-sky);
  color: var(--black);
  text-decoration: none;
  margin-right: 4px;
}
a.warn-chip:hover, a.warn-chip:focus-visible { outline: 1px solid var(--black); }
.ev-pos { color: var(--pos); font-weight: 600; }
.ev-neg { color: var(--muted); }
.muted { color: var(--muted); }

.details {
  background: var(--panel-2);
}
.details-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
  padding: 14px 16px 18px;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 8px 10px;
}
.stat span {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.stat b { font-size: 16px; letter-spacing: -0.02em; }
.summary { font-size: 13px; line-height: 1.5; color: #2a2c31; }
.books { width: 100%; min-width: 0; }
.books th { background: var(--panel-2); color: var(--muted); }
.chart-wrap { margin-top: 12px; }
.chart-wrap h3, .details h3 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-text);
}
svg.usage-chart {
  width: 100%;
  height: 180px;
  background: var(--panel);
  border: 1px solid var(--line);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

footer, .site-footer {
  color: var(--muted);
  font-size: 12px;
  padding-bottom: 32px;
}
footer a, .site-footer a { color: var(--accent-text); }

.glossary {
  width: min(860px, calc(100% - (2 * var(--page-pad))));
  margin: 16px auto 32px;
  box-sizing: border-box;
}
.glossary h2 {
  margin: 28px 0 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-text);
}
.glossary-lead { color: var(--muted); font-size: 14px; line-height: 1.45; }
.glossary-tools { align-items: end; }
.glossary-toc {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}
.glossary-toc a {
  color: var(--accent-text);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.glossary-toc a:hover, .glossary-toc a:focus-visible { text-decoration: underline; }
article.term {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 12px 14px;
  margin: 0 0 10px;
}
article.term:target { border-color: var(--light-blue); box-shadow: inset 3px 0 0 var(--light-blue); }
article.term h3 {
  margin: 0 0 6px;
  font-size: 16px;
  letter-spacing: -0.02em;
}
article.term p { margin: 0; font-size: 14px; line-height: 1.55; color: #2a2c31; }
article.term code {
  font-family: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 12px;
  background: var(--panel-2);
  padding: 1px 4px;
}

@media (max-width: 900px) {
  .filters { grid-template-columns: 1fr 1fr; }
  .details-grid { grid-template-columns: 1fr; }
  :root { --page-pad: 20px; }
  .product-bar {
    grid-template-columns: 1fr;
    grid-template-areas:
      "identity"
      "meta"
      "nav";
  }
  .product-meta { text-align: left; justify-self: start; max-width: none; }
  .product-title { font-size: 24px; }
  .home-brand { font-size: clamp(52px, 18vw, 88px); }
}