:root {
  --navy: #0B1B33;
  --charcoal: #141C2B;
  --blue: #2563EB;
  --green: #16A34A;
  --amber: #D97706;
  --red: #DC2626;
  --slate: #475569;
  --paper: #FFFFFF;
  --muted: #9AA7BC;
  --muted: color-mix(in srgb, var(--slate) 55%, var(--paper));
  --line: #2E3B52;
  --line: color-mix(in srgb, var(--slate) 35%, transparent);
  --line-strong: #46546E;
  --line-strong: color-mix(in srgb, var(--slate) 60%, transparent);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--navy);
  color: var(--paper);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
}

::selection { background: var(--blue); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--blue);
  color: var(--paper);
  padding: 10px 16px;
  text-decoration: none;
  font-weight: 600;
}
.skip:focus { left: 8px; top: 8px; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--navy);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand-block { display: flex; flex-direction: column; gap: 2px; }
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  text-decoration: none;
}
.wordmark { font-weight: 700; font-size: 18px; letter-spacing: 0.01em; }
.parent { margin: 0; font-size: 12px; color: var(--muted); }
.parent a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
.parent a:hover { color: var(--paper); }

nav.primary { margin-left: auto; overflow-x: auto; max-width: 100%; }
nav.primary ul {
  display: flex;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
nav.primary a {
  display: block;
  padding: 8px 10px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  border-radius: 4px;
}
nav.primary a:hover { color: var(--paper); background: var(--charcoal); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--blue);
  color: var(--paper);
}
.btn-primary:hover { background: #3B82F6; background: color-mix(in srgb, var(--blue) 85%, var(--paper)); }
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--blue); }
.btn-platform {
  margin-top: 14px;
  background: transparent;
  color: var(--muted);
  border-color: var(--line-strong);
}
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* Hero */
.hero { padding: 72px 0 56px; border-bottom: 1px solid var(--line); }
.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 700;
}
h1 {
  margin: 0 0 12px;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.sub {
  margin: 0 0 24px;
  max-width: 46ch;
  font-size: clamp(17px, 2.4vw, 22px);
  color: var(--muted);
}
.valueprop {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 12px;
  background: var(--paper);
  color: var(--navy);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 4px;
}
.positioning {
  margin: 0 0 28px;
  max-width: 68ch;
  color: var(--muted);
  font-size: 15px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
.platform-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  color: var(--muted);
  font-size: 13px;
}
.platform-strip li { display: flex; align-items: center; gap: 8px; }

/* Sections */
section { padding: 56px 0; border-bottom: 1px solid var(--line); }
.kicker {
  margin: 0 0 8px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
}
h3.subhead { margin: 36px 0 14px; font-size: 18px; }
.lede { margin: 0 0 28px; max-width: 70ch; color: var(--muted); }
section a { color: var(--blue); }
section a:hover { color: var(--paper); }

.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

/* Panels */
.panel {
  background: var(--charcoal);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}
.panel h3 {
  margin: 0 0 12px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.panel-note {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.panel p { font-size: 14px; color: var(--muted); }
.panel p:last-child { margin-bottom: 0; }

/* Definition lists */
dl.spec {
  display: grid;
  grid-template-columns: minmax(120px, 160px) 1fr;
  gap: 8px 16px;
  margin: 0;
}
dl.spec dt {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
}
dl.spec dd { margin: 0; font-size: 14px; }

/* Lists */
ul.tight {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
ul.tight li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
}
ul.tight li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  background: var(--blue);
}
.mono-list li { font-size: 13px; }

/* Tables */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.data th {
  text-align: left;
  padding: 10px 12px;
  background: var(--charcoal);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}
table.data td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.data tr:last-child td { border-bottom: 0; }
.mono, .rule { font-family: var(--mono); }
.rule { color: var(--blue); font-weight: 600; white-space: nowrap; }

/* Verdict chips — colour is always paired with a text label */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border: 1px solid;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.chip svg { width: 10px; height: 10px; flex: none; }
.chip-pass {
  color: var(--paper);
  border-color: var(--green);
  background: var(--charcoal);
  background: color-mix(in srgb, var(--green) 18%, var(--charcoal));
}
.chip-warning {
  color: var(--paper);
  border-color: var(--amber);
  background: var(--charcoal);
  background: color-mix(in srgb, var(--amber) 18%, var(--charcoal));
}
.chip-fail {
  color: var(--paper);
  border-color: var(--red);
  background: var(--charcoal);
  background: color-mix(in srgb, var(--red) 18%, var(--charcoal));
}
.chip-insufficient {
  color: var(--paper);
  border-color: var(--slate);
  background: var(--charcoal);
}

.verdict-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
}

/* Diagram */
.diagram { display: block; width: 100%; height: auto; }
.svg-node { fill: var(--charcoal); stroke: var(--blue); stroke-width: 1.5; }
.svg-label { fill: var(--paper); font-family: var(--mono); font-size: 13px; font-weight: 700; }
.svg-muted { fill: var(--muted); font-family: var(--mono); font-size: 11px; }
.svg-link { stroke: var(--slate); stroke-width: 2; }
.svg-bottleneck { stroke: var(--amber); stroke-width: 4; }
.svg-bottleneck-text { fill: var(--amber); font-family: var(--mono); font-size: 11px; font-weight: 700; }
.svg-flag { fill: none; stroke: var(--amber); stroke-width: 1; stroke-dasharray: 4 3; }

/* Cards grid */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* Callout note */
.note {
  margin: 24px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--amber);
  background: var(--charcoal);
  background: color-mix(in srgb, var(--amber) 10%, var(--charcoal));
  border-radius: 0 6px 6px 0;
  font-size: 14px;
  color: var(--paper);
}
.note strong { color: var(--paper); }

/* Footer */
footer.site-footer {
  background: var(--charcoal);
  padding: 40px 0 48px;
  color: var(--muted);
  font-size: 13px;
}
footer.site-footer p { margin: 0 0 8px; }
.footer-brand { color: var(--paper); font-size: 14px; }
footer.site-footer a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
footer.site-footer a:hover { color: var(--paper); }
.fine { font-size: 12px; }

/* 404 page */
.page-narrow { padding: 96px 0; }
.page-narrow h1 { font-size: clamp(28px, 4vw, 40px); }

/* Responsive */
@media (max-width: 860px) {
  .feature { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  nav.primary { order: 3; margin-left: 0; width: 100%; }
}
@media (max-width: 560px) {
  dl.spec { grid-template-columns: 1fr; gap: 2px 0; }
  dl.spec dd { margin-bottom: 8px; }
  .hero { padding: 48px 0 40px; }
  section { padding: 40px 0; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}