/* cap-evolve site — light palette, product-landing pattern.
   Bump the ?v=... string on links in each HTML file when this file changes
   so browsers ignore their cached copy. */

:root {
  --bg: #ffffff;
  --bg-soft: #fafafb;
  --bg-code: #f4f4f7;
  --ink: #111318;
  --body: #2a2d34;
  --muted: #666a72;
  --sub: #8a8f98;
  --border: #e5e5eb;
  --border-soft: #eef0f3;
  --accent: #7c5cff;
  --accent-soft: #efeaff;
  --accent-ink: #4b34c9;
  --success: #1a8f4c;
  --success-soft: #e6f4ec;
  --code: #24252b;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--body);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─────────────────────── top navigation ─────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  -webkit-backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand:hover { color: var(--accent-ink); }

.nav-brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: block;
}

.nav-links {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.12s ease;
}

.nav-links a:hover { color: var(--ink); }

.nav-links a.active { color: var(--accent-ink); font-weight: 600; }

.nav-links .gh {
  color: var(--ink);
  border: 1px solid var(--border);
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  transition: border-color 0.12s ease, color 0.12s ease;
}

.nav-links .gh:hover { border-color: var(--accent); color: var(--accent-ink); }

/* ─────────────────────── page container ─────────────────────── */

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.page-narrow {
  max-width: 740px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ─────────────────────── hero (home) ─────────────────────── */

.hero {
  text-align: center;
  padding: 2rem 0 1.5rem;
}

.hero-logo {
  width: 148px;
  height: auto;
  margin: 0 auto 1.4rem;
  display: block;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 0.3rem;
  color: var(--ink);
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--muted);
  font-style: italic;
  margin: 0 0 1.5rem;
}

.hero .description {
  font-size: 1.1rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--body);
  line-height: 1.55;
}

.hero .badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0 0 2.5rem;
}

.badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--bg-code);
  color: var(--muted);
  border: 1px solid var(--border);
}

.badge-accent {
  background: var(--accent-soft);
  color: var(--accent-ink);
  border-color: var(--accent-soft);
}

.badge-success {
  background: var(--success-soft);
  color: var(--success);
  border-color: var(--success-soft);
}

/* CTA row (quickstart under hero) */

.cta {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 0 auto 2.5rem;
  max-width: 720px;
}

.cta h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.cta pre {
  margin: 0;
  padding: 0.9rem 1rem;
  background: var(--code);
  color: #f0f0f4;
  border-radius: 8px;
  font-size: 0.9rem;
  overflow-x: auto;
}

.cta pre + pre { margin-top: 0.4rem; }

.cta pre code { color: inherit; font-family: inherit; }

.cta-note { margin: 0.9rem 0 0; font-size: 0.85rem; color: var(--muted); }
.cta-note a { color: var(--accent-ink); }

/* hero screenshot */

.hero-screenshot {
  margin: 0 auto 3rem;
  max-width: 960px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 24px -8px rgba(20, 20, 30, 0.12),
              0 2px 6px -2px rgba(20, 20, 30, 0.08);
  border: 1px solid var(--border);
}

.hero-screenshot img { display: block; width: 100%; height: auto; }

.hero-screenshot .caption {
  padding: 0.7rem 1rem;
  font-size: 0.85rem;
  color: var(--muted);
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  text-align: center;
}

/* ─────────────────────── section headers ─────────────────────── */

.section {
  padding: 2rem 0;
  border-top: 1px solid var(--border-soft);
}

.section:first-child { border-top: none; }

.section > h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  color: var(--ink);
}

.section > .section-intro {
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 1.5rem;
  max-width: 720px;
}

/* ─────────────────────── tables ─────────────────────── */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  margin: 0 0 1.5rem;
}

table th, table td {
  padding: 0.7rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}

table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--ink);
  font-size: 0.88rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

table tbody tr:hover { background: var(--bg-soft); }

table code {
  background: var(--bg-code);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.88em;
}

.table-hero {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.4rem 1rem;
}

.table-hero th, .table-hero td { border-bottom: 1px solid var(--border); }
.table-hero tbody tr:last-child td { border-bottom: none; }

/* Highlight the improved number */
.gain {
  color: var(--success);
  font-weight: 600;
}

/* ─────────────────────── doc tiles (bottom of home) ─────────────────────── */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
  margin: 1rem 0 0;
}

.tile {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  text-decoration: none;
  color: var(--body);
  transition: border-color 0.12s ease, transform 0.12s ease;
}

.tile:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tile .tile-title {
  font-weight: 600;
  color: var(--ink);
  font-size: 1rem;
  margin: 0 0 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.tile .tile-desc {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
  margin: 0;
}

.tile-badge {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  background: var(--bg-code);
  color: var(--sub);
  margin-left: auto;
  letter-spacing: 0.02em;
}

.tile-badge.on-site { background: var(--accent-soft); color: var(--accent-ink); }
.tile-badge.on-github { background: var(--bg-code); color: var(--muted); }

/* ─────────────────────── differentiator tiles ("Why cap-evolve") ─────────────────────── */

.diff-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.9rem;
  margin: 1rem 0 0;
}

.diff-tile {
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--body);
  text-decoration: none;
  transition: border-color 0.12s ease, transform 0.12s ease, box-shadow 0.12s ease;
  position: relative;
}

.diff-tile:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px -6px rgba(20, 20, 30, 0.08);
}

.diff-tile-num {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 0.08rem 0.4rem;
  align-self: flex-start;
  margin: 0 0 0.55rem;
  letter-spacing: 0.04em;
}

.diff-tile-title {
  font-weight: 700;
  color: var(--ink);
  font-size: 0.98rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.005em;
  line-height: 1.3;
}

.diff-tile-desc {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0 0 0.7rem;
  flex: 1;
}

.diff-tile-link {
  color: var(--accent-ink);
  font-size: 0.82rem;
  font-weight: 500;
  margin-top: auto;
}

.diff-tile:hover .diff-tile-link { color: var(--accent); }

/* Give anchor-linked sections/headings breathing room below the sticky nav */
.section[id], .doc h2[id] { scroll-margin-top: 5rem; }

/* ─────────────────────── content-page typography ─────────────────────── */

.doc h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.doc .lead {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 2rem;
  line-height: 1.5;
}

.doc h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.8rem;
  color: var(--ink);
}

.doc h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.8rem 0 0.6rem;
  color: var(--ink);
}

.doc p { margin: 0 0 1rem; }

.doc ul, .doc ol { margin: 0 0 1rem 1.25rem; padding: 0; }
.doc li { margin: 0.2rem 0; }

.doc a { color: var(--accent-ink); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
.doc a:hover { border-bottom-color: var(--accent); }

.doc code {
  font-family: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
  background: var(--bg-code);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--code);
}

.doc pre {
  background: var(--code);
  color: #f0f0f4;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0 0 1.2rem;
  font-family: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
}

.doc pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.doc blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--body);
  padding: 0.9rem 1.2rem;
  margin: 0 0 1.2rem;
  border-radius: 0 6px 6px 0;
}

.doc blockquote p:last-child { margin-bottom: 0; }

/* ─────────────────────── callouts ─────────────────────── */

.callout {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  margin: 0 0 1.5rem;
  font-size: 0.94rem;
}

.callout-title {
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 0.4rem;
}

.callout-accent {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}

/* ─────────────────────── affiliation strips ─────────────────────── */

/* Hero variant — home page, below the badges */
.hero-affil {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin: 0 0 2.5rem;
  color: var(--sub);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-affil-label { color: var(--sub); font-weight: 500; }

.hero-affil-logos {
  display: inline-flex;
  align-items: center;
  gap: 1.2rem;
}

.hero-affil-logos img { display: block; }
.hero-affil-logos .logo-ibm { height: 26px; width: auto; }
.hero-affil-logos .logo-redhat { height: 26px; width: auto; }

/* Footer variant — smaller, subdued, on every page */
.footer-affil {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--sub);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-affil-logos {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.footer-affil-logos img { display: block; }
.footer-affil-logos .logo-ibm { height: 16px; width: auto; }
.footer-affil-logos .logo-redhat { height: 16px; width: auto; }

/* ─────────────────────── dumbbell chart (results page) ─────────────────────── */

.chart-figure {
  margin: 2rem 0 1rem;
  padding: 0;
}

.chart-figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
}

.chart-caption {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  margin: 0.6rem auto 0;
  max-width: 620px;
  line-height: 1.5;
}

/* SVG chart colors — reuse for maintenance */
.chart-figure .grid-line { stroke: var(--border-soft); stroke-width: 1; }
.chart-figure .axis-tick { stroke: var(--border); stroke-width: 1; }
.chart-figure .axis-label { fill: var(--sub); font-size: 11px; font-family: inherit; }
.chart-figure .row-label { fill: var(--ink); font-size: 12px; font-family: inherit; font-weight: 500; }
.chart-figure .row-sub { fill: var(--sub); font-size: 10px; font-family: inherit; }
.chart-figure .connector { stroke: #c5c8cf; stroke-width: 2; }
.chart-figure .dot-base { fill: #ffffff; stroke: var(--muted); stroke-width: 2; }
.chart-figure .dot-opt { fill: var(--success); stroke: var(--success); stroke-width: 2; }
.chart-figure .val-label { fill: var(--body); font-size: 11px; font-family: inherit; font-variant-numeric: tabular-nums; }
.chart-figure .val-label-opt { fill: var(--success); font-size: 11px; font-family: inherit; font-weight: 600; font-variant-numeric: tabular-nums; }
.chart-figure .gain-label { fill: var(--success); font-size: 11px; font-family: inherit; font-weight: 600; font-variant-numeric: tabular-nums; }
.chart-figure .legend-text { fill: var(--muted); font-size: 11px; font-family: inherit; }

/* ─────────────────────── architecture diagram ─────────────────────── */

.arch-diagram {
  margin: 1rem 0 2rem;
  padding: 1.2rem 0.5rem 0.5rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.arch-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto;
}

.arch-diagram .phase-box { fill: #ffffff; stroke: var(--border); stroke-width: 1; }
.arch-diagram .phase-box-accent { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.arch-diagram .phase-label { fill: var(--ink); font-size: 12px; font-family: inherit; font-weight: 600; text-anchor: middle; }
.arch-diagram .phase-sub { fill: var(--muted); font-size: 10px; font-family: inherit; text-anchor: middle; }
.arch-diagram .arrow { stroke: var(--muted); stroke-width: 1.5; fill: none; }
.arch-diagram .arrow-accent { stroke: var(--accent-ink); stroke-width: 1.5; fill: none; }
.arch-diagram .loop-box { fill: #ffffff; stroke: var(--accent); stroke-width: 1; stroke-dasharray: 4 3; }
.arch-diagram .loop-label { fill: var(--accent-ink); font-size: 11px; font-family: inherit; font-weight: 600; }
.arch-diagram .loop-step { fill: var(--ink); font-size: 11px; font-family: inherit; }
.arch-diagram .caption { fill: var(--muted); font-size: 10px; font-family: inherit; text-anchor: middle; }

/* ─────────────────────── footer ─────────────────────── */

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--accent-ink); }

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ─────────────────────── responsive ─────────────────────── */

@media (max-width: 640px) {
  .nav-inner { padding: 0.7rem 1rem; gap: 1rem; }
  .nav-links { gap: 0.9rem; font-size: 0.85rem; }
  .nav-brand-logo { width: 24px; height: 24px; }
  .page, .page-narrow { padding: 2rem 1rem 3rem; }
  .hero-logo { width: 112px; }
  .hero h1 { font-size: 2.2rem; }
  .hero .tagline { font-size: 1.05rem; }
  .hero .description { font-size: 1rem; }
  .hero-affil { flex-direction: column; gap: 0.5rem; }
  .hero-affil-logos .logo-ibm,
  .hero-affil-logos .logo-redhat { height: 22px; }
  .doc h1 { font-size: 1.8rem; }
  .doc h2 { font-size: 1.3rem; }
  table { font-size: 0.85rem; }
  table th, table td { padding: 0.55rem 0.5rem; }
  .footer-inner { flex-direction: column; }
}