/* AI Reference Library — dark ink + violet glow.
   Same chart family as bimchart.net, different accent and display face. */
:root {
  color-scheme: dark;
  --bg: #07060d;
  --bg-2: #0d0b16;
  --surface: rgba(8, 16, 26, 0.78);
  --surface-2: rgba(12, 24, 36, 0.92);
  --fg: #f2eefc;
  --muted: #9b96b4;
  --line: rgba(196, 166, 255, 0.28);
  --cyan: #c4a6ff;
  --cyan-2: #e4d4ff;
  --cyan-dim: rgba(196, 166, 255, 0.14);
  --cyan-glow: rgba(196, 166, 255, 0.45);
  --navy: #16102a;
  --ink: #0a0814;
  --accent: var(--cyan);
  --olive: #8fd9b4;
  --pro: #7ee0b0;
  --con: #c9d6dc;
  --warn: #ffc857;
  --focus: #e4d4ff;
  --btn: rgba(196, 166, 255, 0.12);
  --btn-h: rgba(196, 166, 255, 0.22);
  --radius: 18px;
  --bar-bg: rgba(196, 166, 255, 0.12);
  --nav-h: 81px; /* fallback; JS sets this to the real .topnav height */
  --display: "Syne", "IBM Plex Sans", "Segoe UI", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.5;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
[hidden] { display: none !important; }
a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--cyan-2); }
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}
.skip {
  position: absolute; left: 12px; top: 8px; z-index: 20;
  background: var(--cyan); color: var(--ink); font-weight: 600;
  padding: 8px 12px; border-radius: 8px; text-decoration: none;
  transform: translateY(-120%);
}
.skip:focus { transform: none; color: var(--ink); }

/* Backdrop: radial glow + CSS grid, perspective floor handled in hero */
.page-bg {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(1200px 600px at 70% -10%, rgba(120, 70, 200, 0.22), transparent 60%),
    radial-gradient(800px 500px at 10% 100%, rgba(80, 40, 140, 0.18), transparent 55%),
    var(--bg);
}
.page-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(196, 166, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 166, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 80%);
  opacity: 0.9;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px max(20px, env(safe-area-inset-left)) 64px max(20px, env(safe-area-inset-right));
}

/* Top nav */
.topnav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(7, 6, 13, 0.82);
  border-bottom: 1px solid var(--line);
}
.topnav .inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  padding: 10px max(20px, env(safe-area-inset-left));
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--fg); text-decoration: none; font-family: var(--display);
  font-weight: 700; font-size: 20px; letter-spacing: 0.04em;
}
.brand svg { display: block; }
.brand:hover { color: var(--cyan-2); }
.nav-links {
  display: flex; flex-wrap: wrap; gap: 4px 2px; margin-left: auto;
  list-style: none; padding: 0;
}
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500;
  padding: 7px 10px; border-radius: 999px;
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  color: var(--fg); background: var(--cyan-dim);
}
.nav-links a[aria-current="page"] { color: var(--cyan); }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(8, 20, 32, 0.5), rgba(5, 10, 16, 0.85));
  margin: 28px 0 12px;
  min-height: 280px;
}
.hero-art {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  color: var(--cyan);
}
.hero-art svg { width: 100%; height: 100%; display: block; }
.hero-copy {
  position: relative; z-index: 1;
  padding: 48px 32px 40px;
  max-width: 42rem;
}
.eyebrow {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 500;
  margin-bottom: 8px;
}
h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 0.95;
  letter-spacing: 0.02em;
  margin: 0 0 12px;
  text-wrap: balance;
}
.lede {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.45;
  margin: 0 0 8px;
  max-width: 58ch;
}
.checked { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

/* Section cards on the home page */
.grp { margin-top: 48px; }
.grp h2 {
  font-family: var(--display);
  font-weight: 650;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: 0.04em;
  margin: 0 0 16px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card, .pcard {
  display: flex; flex-direction: column; gap: 8px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 0 0 1px rgba(196, 166, 255, 0.04), 0 12px 40px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
  color: inherit;
  text-decoration: none;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
a.card:hover, a.card:focus-visible,
.pcard:hover, .pcard:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan), 0 0 28px var(--cyan-glow), 0 16px 40px rgba(0, 0, 0, 0.45);
  transform: translateY(-2px);
  color: inherit;
}
.cnt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 500;
}
.nm {
  font-family: var(--display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.05;
  letter-spacing: 0.02em;
}
.ds { color: var(--muted); font-size: 15px; flex: 1; }
.go { font-weight: 600; font-size: 14px; color: var(--cyan); margin-top: 6px; }

/* Filters / search / sort */
.toolbar {
  display: flex; flex-wrap: wrap; gap: 12px 16px;
  align-items: center;
  margin: 22px 0 10px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font: 500 13px var(--body);
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--btn);
  color: var(--fg);
  cursor: pointer;
}
.chip:hover { background: var(--btn-h); }
.chip[aria-pressed="true"] {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
  font-weight: 600;
}
.search, .sort {
  display: flex; flex-direction: column; gap: 4px;
  font-size: 12px; color: var(--muted); font-family: var(--mono);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.search input, .sort select {
  font: 500 15px var(--body);
  letter-spacing: 0;
  text-transform: none;
  color: var(--fg);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  min-width: 220px;
}
.sort select { min-width: 180px; }
.count { color: var(--muted); font-size: 14px; margin: 0 0 14px; }

/* Product cards */
.pcards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.pcard { gap: 10px; color: var(--fg); }
.pcard .maker {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  margin-top: 2px;
}
.known { margin: 0; font-size: 15px; color: var(--fg); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 11px; font-weight: 600;
  padding: 3px 8px; border-radius: 999px;
  background: var(--cyan-dim); color: var(--cyan-2);
  border: 1px solid rgba(196, 166, 255, 0.2);
}
.price, .learn, .sub {
  display: block;
  font-size: 13px;
  color: var(--muted);
}
.price b, .learn b { color: var(--fg); font-weight: 600; }
.stars { color: var(--cyan); font-size: 18px; letter-spacing: 1px; line-height: 1; }
.stars.off { color: rgba(196, 166, 255, 0.22); }
.starline { white-space: nowrap; }
.pop-row, .cost-row { display: grid; gap: 2px; }
.rate-lbl, .cost-head { font-size: 13px; color: var(--muted); }
.rate-lbl { font-weight: 600; }
.cost-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.cost-head b { color: var(--fg); font-weight: 600; }
.costline { white-space: nowrap; font-family: var(--mono); font-weight: 700; font-size: 18px; letter-spacing: 1px; line-height: 1; color: var(--warn); }
.cost-off { color: rgba(255, 200, 87, 0.22); }
.pc { display: grid; gap: 4px; font-size: 14px; margin-top: 4px; }
.pro { color: var(--pro); font-weight: 600; }
.con { color: var(--con); }
.official {
  margin-top: 6px;
  font-weight: 600;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
}
.official:hover { text-decoration: underline; }

/* Notes */
.notes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 36px;
}
.notes section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 20px 22px;
}
.notes h2 {
  font-family: var(--display);
  font-size: 22px;
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}
.notes p, .notes li { color: var(--muted); font-size: 14.5px; margin: 0; }
.notes ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }

/* Footer */
.site-footer {
  max-width: 1180px;
  margin: 8px auto 40px;
  padding: 0 max(20px, env(safe-area-inset-left)) 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}
.site-footer p { margin: 0 0 10px; }
.kofi { text-align: center; color: var(--muted); }
.kofi a { color: var(--cyan); text-decoration: none; }
.kofi a:hover { color: var(--cyan-2); text-decoration: underline; }
.kofi.updated { margin-bottom: 4px; }

/* Updates / article pages */
article.wrap h2 { font-family: var(--display); letter-spacing: 0.03em; }
article.wrap time { color: var(--cyan); font-family: var(--mono); font-size: 13px; }
.log { border-left: 2px solid var(--line); padding-left: 16px; margin: 24px 0; }
.log h3 { margin: 0 0 6px; font-size: 20px; font-family: var(--display); }

.back {
  display: inline-block;
  margin: 16px 0 0 max(20px, env(safe-area-inset-left));
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}


/* Comparison chart (ammo-style table, BIM theme) */
.wrap.chart-wrap { max-width: 1280px; }
.table-box {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  backdrop-filter: blur(12px);
}
table.chart {
  border-collapse: collapse;
  width: 100%;
  min-width: 1480px;
  font-variant-numeric: tabular-nums;
  font-size: 15px;
}
.chart th, .chart td {
  padding: 11px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.chart tbody tr:last-child td { border-bottom: 0; }
.chart tbody tr:hover td { background: rgba(196, 166, 255, 0.04); }
.chart th {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  background: #120e1c;
  position: sticky;
  top: 0; /* stick to the table-box horizontal scrollport; --nav-h is used for scroll-margin */
  white-space: nowrap;
  z-index: 3;
  border-bottom: 1px solid var(--line);
}
.chart th.learn-th {
  white-space: normal;
  line-height: 1.3;
  vertical-align: bottom;
}
.chart .th-note {
  display: block;
  margin-top: 3px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--muted);
}
.th-btn {
  all: unset;
  cursor: pointer;
  display: inline-flex;
  gap: 4px;
  align-items: center;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
}
.th-btn::after { content: "↕"; opacity: .4; font-size: 11px; }
.th-btn[data-dir="asc"]::after { content: "↑"; opacity: 1; color: var(--cyan); }
.th-btn[data-dir="desc"]::after { content: "↓"; opacity: 1; color: var(--cyan); }
.prod {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-width: 220px;
}
.app-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  flex: none;
  background: var(--ink);
  box-shadow: 0 0 0 1px rgba(196, 166, 255, 0.12);
}
.cart {
  font-family: var(--display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.08;
  letter-spacing: 0.01em;
  display: block;
}
.year {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  margin-top: 3px;
}
.purpose { max-width: 36ch; min-width: 240px; }
.chart .tags { margin-top: 6px; }
.chart .sub {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  margin-top: 3px;
  max-width: 32ch;
  white-space: normal;
}
.chart .pc { margin-top: 0; }
.chart .official { margin-top: 0; white-space: nowrap; }
.chart td.empty { color: var(--muted); font-size: 14px; }

/* Scroll-hint chrome, tinted to the blueprint theme */
body .sh-hint {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--fg);
}
body .sh-btn {
  border: 1px solid var(--line);
  background: var(--btn);
  color: var(--fg);
  border-radius: 8px;
}
body .sh-btn:hover:not(:disabled) { border-color: var(--cyan); color: var(--cyan); }
body .sh-arrow { color: var(--cyan); }
body .sh-edge.l { background: linear-gradient(to right, var(--bg-2), transparent); }
body .sh-edge.r { background: linear-gradient(to left, var(--bg-2), transparent); }

/* Deep-linked row (section.html#p-id): brief cyan highlight */
.chart tbody tr { scroll-margin-top: calc(var(--nav-h) + 20px); }
@keyframes row-flash {
  0%, 55% { background: rgba(196, 166, 255, 0.22); }
  100% { background: transparent; }
}
.chart tbody tr.row-flash td { animation: row-flash 3s ease-out; }
.chart tbody tr.row-flash td:first-child { box-shadow: inset 4px 0 0 var(--cyan); }
@media (prefers-reduced-motion: reduce) {
  .chart tbody tr.row-flash td { animation: none; background: rgba(196, 166, 255, 0.18); }
}

/* Homepage search across every section */
.site-search {
  margin: 26px 0 30px;
  padding: 20px 22px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(12px);
  box-shadow: 0 0 0 1px rgba(196, 166, 255, 0.04), 0 12px 40px rgba(0, 0, 0, 0.35);
}
.site-search h2 { margin-bottom: 10px; }
.site-search label {
  display: block;
  font: 500 12px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.site-search input {
  width: 100%;
  font: 500 17px var(--body);
  color: var(--fg);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
}
.site-search input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px var(--cyan-dim), 0 0 18px var(--cyan-glow); outline: none; }
.site-search .sr-status { color: var(--muted); font-size: 14px; margin: 10px 0 0; }
.sr-list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; max-height: 560px; overflow-y: auto; }
.sr-item {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 8, 20, 0.65);
  color: var(--fg);
  text-decoration: none;
}
.sr-item:hover, .sr-item:focus-visible { border-color: var(--cyan); box-shadow: 0 0 0 1px var(--cyan), 0 0 18px var(--cyan-glow); color: var(--fg); outline: none; }
.sr-icon { flex: none; width: 40px; height: 40px; border-radius: 9px; object-fit: contain; background: rgba(255, 255, 255, 0.04); }
.sr-main { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.sr-name { font-weight: 600; font-size: 16px; }
.sr-maker { color: var(--muted); font-size: 13px; }
.sr-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.sr-sec {
  flex: none;
  font: 500 12px var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .sr-item { flex-wrap: wrap; }
  .sr-sec { margin-left: 54px; }
}

@media (max-width: 800px) {
  .chart th { position: static; }
}

@media (max-width: 640px) {
  .hero-copy { padding: 32px 20px 28px; }
  .nav-links { margin-left: 0; width: 100%; }
  .search input { min-width: 0; width: 100%; }
  .toolbar { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a.card, a.pcard, a.card:hover { transition: none; transform: none; }
}

/* Extra comparison columns on hardware charts only */
table.chart.chart-wide { min-width: 1960px; }
.chart td.hw {
  max-width: 22ch;
  min-width: 11ch;
  font-size: 13.5px;
  color: var(--fg);
  white-space: normal;
}