@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

* { box-sizing: border-box; }
html { color-scheme: light dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

img, svg { max-width: 100%; }
a { color: var(--accent-strong); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  text-wrap: balance;
  margin: 0 0 0.5em;
  color: var(--text);
}
h1 { font-size: var(--step-4); font-weight: 500; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); font-family: var(--font-body); font-weight: 600; }

p { margin: 0 0 1.1em; max-width: 68ch; }
.lede { font-size: var(--step-1); color: var(--text-muted); max-width: 58ch; }

code, kbd, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}
pre {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  line-height: 1.55;
  color: var(--text);
}
:not(pre) > code {
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent-strong);
  display: block;
  margin-bottom: 0.6em;
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1240px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}
.brand .mark { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--step--1);
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-s);
  width: 40px;
  height: 40px;
  flex: none;
  padding: 0;
  color: var(--text);
  cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; display: block; }
.nav-toggle .icon-close { display: none; }
body.nav-open .nav-toggle .icon-open { display: none; }
body.nav-open .nav-toggle .icon-close { display: block; }
@media (max-width: 780px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  body.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem 1.5rem;
    gap: 1rem;
  }
  .nav-cta .btn-text { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--step--1);
  padding: 0.65em 1.1em;
  border-radius: var(--radius-s);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: var(--text-on-accent); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }

/* ---------- sections ---------- */
section { padding: 5.5rem 0; }
section.tight { padding: 3rem 0; }
.section-head { max-width: 62ch; margin-bottom: 2.75rem; }
.bg-sunken { background: var(--surface-sunken); }
hr.rule { border: none; border-top: 1px solid var(--border); margin: 0; }

/* ---------- hero ---------- */
.hero {
  padding: 3.5rem 0 4.5rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }
.hero h1 { font-size: clamp(2.2rem, 4vw + 1rem, 3.4rem); }
.hero .lede { margin-bottom: 1.6rem; }
.hero-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.badges { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3em 0.75em 0.3em 0.85em;
  text-decoration: none;
  line-height: 1.4;
}
.badge-pill:hover { border-color: var(--accent); color: var(--accent-strong); }
.badge-pill .badge-val { color: var(--text); font-weight: 600; }
.badge-pill .badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }
.install-line {
  display: inline-flex;
  align-items: center;
  gap: 1.5rem;
  width: fit-content;
  max-width: 100%;
  background: var(--surface-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 0.7rem 0.8rem 0.7rem 1rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
}
.install-line code { overflow-x: auto; white-space: nowrap; }
.install-line button {
  flex: none;
  background: none; border: none; color: var(--text-muted); cursor: pointer; font-family: inherit;
}
.install-line button:hover { color: var(--accent-strong); }

/* request inspector panel (hero visual) */
.inspector {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.inspector-bar {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}
.inspector-bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border-strong); }
.inspector-body { padding: 1.1rem 1.2rem 1.3rem; font-family: var(--font-mono); font-size: 0.82rem; }
.inspector-row { display: flex; gap: 0.6rem; padding: 0.15rem 0; color: var(--text-muted); }
.inspector-row .k { color: var(--text-faint); min-width: 108px; }
.inspector-row .v { color: var(--text); }
.inspector-divider { height: 1px; background: var(--border); margin: 0.8rem 0; }
.verdict {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 0.9rem; padding: 0.7rem 0.9rem;
  border-radius: var(--radius-s);
  background: var(--critical-soft);
  border: 1px solid color-mix(in srgb, var(--critical) 35%, transparent);
}
.verdict .tag {
  font-family: var(--font-mono); font-weight: 600; font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--critical);
}
.verdict .conf { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-muted); }

/* ---------- stat tiles ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
}
@media (max-width: 780px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
.stat {
  background: var(--surface);
  padding: 1.6rem 1.4rem;
}
.stat .num {
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-variant-numeric: tabular-nums;
  color: var(--text);
  display: block;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.stat .label { color: var(--text-muted); font-size: var(--step--1); }

/* ---------- cards / grid ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.75rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.6rem 1.7rem;
}

/* ---------- pipeline diagram ---------- */
.pipeline { display: flex; flex-direction: column; gap: 0; }
.pipeline-svg { width: 100%; height: auto; }
.pipeline-svg text { font-family: var(--font-mono); fill: var(--text); }
.pipeline-svg .muted { fill: var(--text-muted); }
.pipeline-svg .faint { fill: var(--text-faint); }
.pipeline-svg .box { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1.25; }
.pipeline-svg .box-accent { fill: var(--accent-soft); stroke: var(--accent); }
.pipeline-svg .box-critical { fill: var(--critical-soft); stroke: var(--critical); }
.pipeline-svg .arrow { stroke: var(--text-faint); stroke-width: 1.25; fill: none; marker-end: url(#arrowhead); }

/* ---------- tables ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-m); }
table { border-collapse: collapse; width: 100%; font-size: var(--step--1); min-width: 560px; }
th, td { text-align: left; padding: 0.65rem 0.9rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); background: var(--surface-sunken); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--font-mono); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-sunken); }
td.wrap-cell { white-space: normal; }

/* ---------- bar chart ---------- */
.chart { margin: 1.5rem 0; }
.chart-title { font-weight: 600; margin-bottom: 0.2rem; }
.chart-sub { color: var(--text-muted); font-size: var(--step--1); margin-bottom: 1rem; }
.bar-row { display: grid; grid-template-columns: 150px 1fr 56px; align-items: center; gap: 0.7rem; margin: 0.55rem 0; }
.bar-row .bar-label { font-size: var(--step--1); color: var(--text-muted); }
.bar-track { position: relative; height: 14px; background: var(--surface-sunken); border-radius: 7px; }
.bar-fill { position: absolute; inset: 0 auto 0 0; border-radius: 7px; height: 100%; }
.bar-row .bar-val { font-family: var(--font-mono); font-size: var(--step--1); text-align: right; font-variant-numeric: tabular-nums; }
.legend { display: flex; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 1rem; font-size: var(--step--1); color: var(--text-muted); }
.legend .swatch { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend .dot { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }
[data-tooltip] { position: relative; cursor: help; }
.tooltip-bubble {
  position: absolute; bottom: calc(100% + 8px); left: 0;
  background: var(--text); color: var(--bg);
  font-family: var(--font-mono); font-size: 0.72rem;
  padding: 0.4rem 0.6rem; border-radius: 4px;
  white-space: nowrap; opacity: 0; pointer-events: none;
  transform: translateY(4px);
  transition: opacity 0.12s ease, transform 0.12s ease;
  z-index: 10;
}
[data-tooltip]:hover .tooltip-bubble,
[data-tooltip]:focus-visible .tooltip-bubble { opacity: 1; transform: translateY(0); }

/* grouped bar chart (config comparison) */
.grouped-chart { display: flex; align-items: flex-end; gap: 2.2rem; height: 240px; padding: 0 0.5rem; border-bottom: 1px solid var(--border); overflow-x: auto; }
.group { display: flex; flex-direction: column; align-items: center; min-width: 150px; }
.group-bars { display: flex; align-items: flex-end; gap: 6px; height: 190px; }
.group-bars .gbar { width: 22px; border-radius: 3px 3px 1px 1px; position: relative; }
.group-bars .gbar .gval { position: absolute; top: -20px; left: 50%; transform: translateX(-50%); font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-muted); white-space: nowrap; }
.group-name { margin-top: 0.7rem; font-size: var(--step--1); color: var(--text-muted); text-align: center; }

/* ---------- limitation cards ---------- */
.limitation {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1.4rem;
  padding: 1.8rem 0;
  border-top: 1px solid var(--border);
}
.limitation:first-of-type { border-top: none; }
.limitation .idx {
  font-family: var(--font-display);
  font-size: var(--step-2);
  color: var(--text-faint);
}
.limitation h4 { margin-bottom: 0.5rem; }
.limitation .status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15em 0.55em;
  border-radius: 4px;
  margin-left: 0.6em;
  vertical-align: middle;
}
.status-open { background: var(--warning-soft); color: var(--warning); }
.status-resolved { background: var(--accent-soft); color: var(--accent-strong); }
.status-accepted { background: var(--surface-sunken); color: var(--text-muted); }

/* ---------- callout ---------- */
.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 1.1rem 1.4rem;
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  margin: 1.5rem 0;
}
.callout.warn { border-color: var(--warning); background: var(--warning-soft); }
.callout p:last-child { margin-bottom: 0; }

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2.5rem;
  background: var(--surface-sunken);
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2.5rem; }
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr; } }
footer h4 { font-size: var(--step--1); text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); }
footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
footer a { color: var(--text-muted); text-decoration: none; font-size: var(--step--1); }
footer a:hover { color: var(--accent-strong); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem; font-size: var(--step--1); color: var(--text-faint); padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* ---------- misc ---------- */
.kicker-link { font-family: var(--font-mono); font-size: var(--step--1); }
.two-col-copy { columns: 2; column-gap: 3rem; }
@media (max-width: 780px) { .two-col-copy { columns: 1; } }
.pill-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.pill {
  font-family: var(--font-mono); font-size: 0.72rem;
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 0.2em 0.75em; color: var(--text-muted);
}