/* ==========================================================================
   KAGENTI.IO — Design System
   4 type sizes. One accent color. Left-aligned throughout.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --c-bg:      #f2f2f2;
  --c-surface: #ffffff;
  --c-border:  #c7c7c7;
  --c-text:    #151515;
  --c-muted:   #4d4d4d;
  --c-accent:  #0066cc;
  --c-accent-dark: #003366;
  --c-code-bg: #f2f2f2;
  --c-dark:    #151515;    /* code section bg = same as text */

  /* Type — 4 sizes only.
     Hierarchy comes from weight (400/500/600) and color (text/muted/accent). */
  --sz-label:   0.75rem;                          /* 12px — uppercase labels only */
  --sz-body:    0.9375rem;                        /* 15px — all running text */
  --sz-heading: clamp(1.375rem, 2.5vw, 1.75rem); /* 22–28px — all h2/h3 */
  --sz-display: clamp(2.25rem, 5vw, 3.75rem);    /* 36–60px — hero h1 + stat numbers */

  /* Code section — own set, separate from page type */
  --sz-code:    0.8125rem;  /* 13px */

  --font-sans:    'Red Hat Text', Helvetica, Arial, sans-serif;
  --font-mono:    'Red Hat Mono', 'Courier New', monospace;
  --font-display: 'Red Hat Display', Helvetica, Arial, sans-serif;

  /* Spacing */
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  --max-w:    1120px;
  --gutter:   clamp(1.25rem, 4vw, 2.5rem);
  --radius:   4px;
  --ease:     120ms ease;
  --col-left: 240px;
}

/* --------------------------------------------------------------------------
   Accessibility utilities
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--gutter);
  background: var(--c-accent);
  color: #fff;
  padding: var(--sp-3) var(--sp-6);
  font-size: var(--sz-body);
  font-weight: 600;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  z-index: 10000;
}
.skip-link:focus { top: 0; }

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

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a { color: inherit; }
ul, ol { list-style: none; }

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  font-size: var(--sz-body);
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.6rem 1.25rem;
  font-family: var(--font-sans);
  font-size: var(--sz-body);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.005em;
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--ease), border-color var(--ease);
}
.btn-primary {
  background: var(--c-accent);
  color: #fff;
  border: 1.5px solid var(--c-accent);
}
.btn-primary:hover { background: var(--c-accent-dark); border-color: var(--c-accent-dark); }
.btn-ghost {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}
.btn-ghost:hover { border-color: var(--c-muted); }
.btn-sm { padding: 0.4rem 0.875rem; font-size: var(--sz-label); }

/* --------------------------------------------------------------------------
   Banner
   -------------------------------------------------------------------------- */
.banner {
  background: var(--c-dark);
  color: #f9f9f7;
  padding: 0.6rem var(--gutter);
  font-size: var(--sz-body);
  position: relative;
}
.banner .container { display: flex; align-items: center; justify-content: center; gap: var(--sp-4); }
.banner p { text-align: center; }
.banner a { color: #f9f9f7; font-weight: 500; text-decoration: none; border-bottom: 1px solid rgba(249,249,247,0.5); white-space: nowrap; }
.banner a:hover { border-bottom-color: #f9f9f7; }
.banner-close {
  position: absolute; right: var(--gutter); top: 50%; transform: translateY(-50%);
  opacity: 0.45; font-size: 1.25rem; line-height: 1; padding: 0.25rem 0.5rem;
  transition: opacity var(--ease);
}
.banner-close:hover { opacity: 1; }
.banner.hidden { display: none; }

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(249, 249, 247, 0.92);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner { display: flex; align-items: center; gap: var(--sp-8); height: 56px; }

.logo { display: flex; align-items: center; gap: var(--sp-2); text-decoration: none; flex-shrink: 0; }
.logo svg { height: 28px; width: auto; }
.logo-wordmark { font-size: var(--sz-body); font-weight: 600; letter-spacing: -0.02em; color: var(--c-text); }

.site-nav { display: flex; align-items: center; gap: var(--sp-6); flex: 1; }
.site-nav a { font-size: var(--sz-body); color: var(--c-muted); text-decoration: none; transition: color var(--ease); }
.site-nav a:hover { color: var(--c-text); }
.site-nav a.nav-highlight { color: var(--c-accent); font-weight: 500; border-bottom: 1px solid var(--c-accent); }
.site-nav a.nav-highlight:hover { color: var(--c-accent-dark); border-bottom-color: var(--c-accent-dark); }
.site-nav .nav-placeholder { font-size: var(--sz-body); color: var(--c-border); cursor: default; }

.header-actions { display: flex; align-items: center; gap: var(--sp-3); margin-left: auto; }
.github-link {
  display: flex; align-items: center; gap: var(--sp-2);
  font-size: var(--sz-body); color: var(--c-muted); text-decoration: none;
  transition: color var(--ease);
}
.github-link:hover { color: var(--c-text); }
.star-count {
  font-family: var(--font-mono); font-size: var(--sz-label);
  background: var(--c-code-bg); padding: 0.2rem 0.4rem;
  border-radius: 3px; border: 1px solid var(--c-border); color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   Section chrome
   -------------------------------------------------------------------------- */
section { padding-block: var(--sp-20); border-bottom: 1px solid var(--c-border); }

/* A small all-caps prefix label — used to introduce sections */
.label {
  display: block;
  font-size: var(--sz-label); font-weight: 600;
  color: var(--c-accent);
  text-transform: uppercase; letter-spacing: 0.09em;
  margin-bottom: var(--sp-3);
}

/* Eyebrow — same visual treatment as .label but on an h2.
   Used in tabbed sections where the panel h3 is the primary headline. */
.section-eyebrow {
  font-size: var(--sz-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  margin-bottom: var(--sp-5);
  max-width: none;
}

/* Section h2 — heading size, used consistently everywhere */
.section-header {
  font-size: var(--sz-heading);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--c-text);
  margin-bottom: var(--sp-12);
  max-width: 640px;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  background: var(--c-surface);
  padding-block: var(--sp-24) var(--sp-20);
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: var(--sz-display);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--c-text);
  max-width: 800px;
  margin-bottom: var(--sp-6);
}
.hero-br { display: none; }
@media (min-width: 1280px) { .hero-br { display: block; } }
.hero-sub {
  font-size: var(--sz-body);
  color: var(--c-muted);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: var(--sp-10);
}
.hero-ctas {
  display: flex; align-items: center; gap: var(--sp-3);
  flex-wrap: wrap; margin-bottom: var(--sp-16);
}

/* --------------------------------------------------------------------------
   Capabilities
   -------------------------------------------------------------------------- */
.capabilities { background: var(--c-bg); }

/* CNCF shelf — bottom-of-section row, matches oss-shelf treatment */
.cncf-shelf {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  border-top: 1px solid var(--c-border);
  padding-top: var(--sp-8);
  margin-top: var(--sp-8);
  flex-wrap: wrap;
}
.cncf-shelf > p {
  font-size: var(--sz-label);
  color: var(--c-text);
  flex: 1;
  white-space: nowrap;
}
.cncf-tags { margin-left: auto; }

/* --------------------------------------------------------------------------
   Unified left-tab component
   Used by: capabilities (stack), agent models, code section (get up and running)
   -------------------------------------------------------------------------- */
.left-tabs {
  display: grid;
  grid-template-columns: var(--col-left) 1fr;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: var(--sp-12);
}

.left-tab-nav {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--c-border);
}

.left-tab-btn {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  border-top: 1px solid var(--c-border);
  border-left: 2px solid transparent;
  text-align: left;
  width: 100%;
  background: var(--c-bg);
  transition: background var(--ease);
}
.left-tab-btn:first-child { border-top: none; }
.left-tab-btn:hover { background: rgba(0, 0, 0, 0.02); }
.left-tab-btn.active { border-left-color: var(--c-accent); background: var(--c-surface); }

.ltb-num {
  font-family: var(--font-mono);
  font-size: var(--sz-label);
  color: var(--c-border);
  flex-shrink: 0;
  line-height: 1;
}
.left-tab-btn.active .ltb-num { color: var(--c-accent); }

.ltb-label {
  font-size: var(--sz-label);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--c-muted);
}
.left-tab-btn.active .ltb-label { color: var(--c-text); }

.left-tab-panels { background: var(--c-surface); }
.left-tab-panel { padding: var(--sp-8); display: none; }
.left-tab-panel.active { display: block; }

/* Capabilities: 2-col bullet grid within panels */
.stack-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-5) var(--sp-8);
}
.stack-items li { font-size: var(--sz-body); color: var(--c-muted); line-height: 1.55; }
.stack-items li strong { display: block; color: var(--c-text); font-weight: 500; margin-bottom: 0.15rem; }
.stack-items li strong a { color: inherit; text-decoration: none; }
.stack-items li strong a:hover { color: var(--c-accent); }

/* --------------------------------------------------------------------------
   Component cards — capabilities section
   -------------------------------------------------------------------------- */
.component-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8) var(--sp-10);
  margin-bottom: var(--sp-12);
}

.component-card {
  border-top: 2px solid var(--c-border);
  padding-top: var(--sp-5);
}

.component-card-meta {
  font-family: var(--font-mono);
  font-size: var(--sz-label);
  color: var(--c-accent);
  letter-spacing: 0.02em;
  margin-bottom: var(--sp-2);
}

.component-card h3 {
  font-size: var(--sz-body);
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-3);
}

.component-card h3 a {
  color: inherit;
  text-decoration: none;
}

.component-card h3 a:hover { color: var(--c-accent); }

.component-card p {
  font-size: var(--sz-body);
  color: var(--c-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Use Cases / Demos — Carousel
   -------------------------------------------------------------------------- */
.use-cases { background: var(--c-surface); }

/* Top nav strip — matches .htab-nav but light */
.demo-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--sp-10);
}
.demo-nav-btn {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-5) var(--sp-6);
  font-size: var(--sz-label); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--c-muted);
  background: transparent;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  text-align: left; width: 100%;
  transition: color var(--ease), border-color var(--ease);
}
.demo-nav-btn + .demo-nav-btn { border-left: 1px solid var(--c-border); }
.demo-nav-btn:hover { color: var(--c-text); }
.demo-nav-btn.active { color: var(--c-text); border-bottom-color: var(--c-accent); }
.demo-nav-icon { display: flex; color: var(--c-muted); flex-shrink: 0; }
.demo-nav-btn.active .demo-nav-icon { color: var(--c-accent); }
.demo-nav-label {
  font-size: var(--sz-label); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--c-muted);
}
.demo-nav-btn.active .demo-nav-label { color: var(--c-text); }

/* Slides */
.demo-slide { display: none; }

@keyframes demo-fade-in {
  from { opacity: 0; transform: translateX(8px); }
  to   { opacity: 1; transform: translateX(0); }
}
.demo-slide.active {
  display: block;
  animation: demo-fade-in 180ms ease forwards;
}

.demo-slide-inner { display: grid; min-width: 0; }
.demo-slide-inner--code { grid-template-columns: 1fr 1.6fr; gap: var(--sp-12); align-items: start; }

/* Prose side */
.demo-slide-prose {
  display: flex; flex-direction: column;
}
.demo-slide-prose h3 {
  font-size: var(--sz-heading); font-weight: 500;
  letter-spacing: -0.02em; line-height: 1.2;
  color: var(--c-text); margin-bottom: var(--sp-4);
}
.demo-slide-prose > p {
  font-size: var(--sz-body); color: var(--c-muted);
  line-height: 1.65; margin-bottom: var(--sp-5);
}
.demo-slide-prose ul { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-6); }
.demo-slide-prose li {
  font-size: var(--sz-body); color: var(--c-muted);
  line-height: 1.5; padding-left: var(--sp-5); position: relative;
}
.demo-slide-prose li::before {
  content: '—'; position: absolute; left: 0;
  color: var(--c-accent); font-size: 0.8em; top: 0.12em;
}

/* Video thumbnail link */
.demo-video {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-border);
  text-decoration: none;
  transition: border-color var(--ease);
}
.demo-video:hover { border-color: var(--c-accent); }
.demo-video-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--c-dark);
  overflow: hidden;
}
.demo-video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity var(--ease);
}
.demo-video:hover .demo-video-thumb img { opacity: 0.85; }
.demo-video-play {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.demo-video-play svg {
  width: 44px; height: 44px;
  background: rgba(0,0,0,0.55);
  border-radius: 50%;
  padding: 10px;
  transition: background var(--ease), transform var(--ease);
}
.demo-video:hover .demo-video-play svg {
  background: var(--c-accent);
  transform: scale(1.08);
}
.demo-video-cta {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--sz-body);
  font-weight: 500;
  color: var(--c-muted);
  background: var(--c-bg);
  transition: color var(--ease);
}
.demo-video:hover .demo-video-cta { color: var(--c-accent); }

/* Code side */
.demo-slide-code { display: flex; flex-direction: column; gap: var(--sp-4); min-width: 0; }

/* Light-mode code block (shared) */
.demo-code {
  background: var(--c-code-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: var(--sp-5);
}
.demo-code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.45rem var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  font-family: var(--font-mono); font-size: var(--sz-label);
  color: var(--c-muted);
}
.demo-code pre {
  padding: var(--sp-5) var(--sp-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--sz-code);
  line-height: 1.75;
  color: var(--c-text);
  tab-size: 2;
}

/* Light-mode syntax tokens (demo-code blocks) */
.dk     { color: var(--c-muted); }          /* comment  */
.dk-key { color: var(--c-accent); }          /* key      */
.dk-val { color: #166534; }                  /* value    */

/* Dark-mode tokens scoped to light-mode code blocks */
.demo-code .key { color: var(--c-accent); }          /* yaml key  */
.demo-code .val { color: #166534; }                  /* yaml val  */
.demo-code .str { color: #9a3412; }                  /* yaml str  */
.demo-code .cmd { color: #1d4ed8; }                  /* command   */

/* --------------------------------------------------------------------------
   Agent Models
   -------------------------------------------------------------------------- */
.agent-models { background: var(--c-surface); }

.agent-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8);
}

.agent-col { border-top: 1px solid var(--c-border); padding-top: var(--sp-6); }

.col-icon {
  display: block;
  color: var(--c-accent);
  margin-bottom: var(--sp-4);
}

.agent-col h3 {
  font-size: var(--sz-body); font-weight: 600;
  letter-spacing: -0.01em; color: var(--c-text);
  margin-bottom: var(--sp-3);
  display: flex; align-items: center; gap: var(--sp-3); flex-wrap: wrap;
}
.coming-soon {
  font-family: var(--font-mono);
  font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--c-muted);
  background: var(--c-code-bg);
  border: 1px solid var(--c-border);
  border-radius: 3px;
  padding: 0.15rem 0.45rem;
  white-space: nowrap;
}

.agent-col p {
  font-size: var(--sz-body); color: var(--c-muted);
  line-height: 1.65; margin-bottom: var(--sp-5);
}

.agent-col ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.agent-col li {
  font-size: var(--sz-body); color: var(--c-muted);
  line-height: 1.5; padding-left: var(--sp-5); position: relative;
}
.agent-col li::before {
  content: '—'; position: absolute; left: 0;
  color: var(--c-accent); font-size: 0.8em; top: 0.12em;
}

/* --------------------------------------------------------------------------
   Code / Get Up and Running section
   -------------------------------------------------------------------------- */
.code-section {
  background: var(--c-dark);
  color: #f9f9f7;
  border-bottom-color: transparent;
}

/* Section header on dark */
.code-section .section-eyebrow { color: rgba(249, 249, 247, 0.6); }

/* Horizontal tabs — code section */
.htab-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: var(--sp-10);
}
.htab-btn {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-5) var(--sp-8);
  font-size: var(--sz-label); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--ease), border-color var(--ease);
}
.htab-btn + .htab-btn { border-left: 1px solid rgba(255, 255, 255, 0.12); }
.htab-btn:hover { color: rgba(255, 255, 255, 0.7); }
.htab-btn.active { color: #f9f9f7; border-bottom-color: #f9f9f7; }

.htab-panel { display: none; }
.htab-panel.active { display: block; }

/* Code panel — prose + code 2-col sub-grid */
.code-panel-inner {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--sp-12);
  align-items: start;
  min-width: 0;
}

/* Left column: prose */
.code-prose h2 {
  font-size: var(--sz-heading); font-weight: 500;
  letter-spacing: -0.02em; line-height: 1.2;
  color: #f9f9f7; margin-bottom: var(--sp-4);
}
.code-prose p {
  font-size: var(--sz-body); color: rgba(249, 249, 247, 0.55);
  line-height: 1.65; margin-bottom: var(--sp-6);
}
.code-prose ul { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-8); }
.code-prose li {
  font-size: var(--sz-body); color: rgba(249, 249, 247, 0.55);
  line-height: 1.5; padding-left: var(--sp-5); position: relative;
}
.code-prose li::before {
  content: '—'; position: absolute; left: 0;
  color: var(--c-accent); font-size: 0.8em; top: 0.12em;
}
.code-links { display: flex; flex-direction: column; gap: var(--sp-3); }
.code-links a {
  font-size: var(--sz-body); color: var(--c-accent);
  font-weight: 500; text-decoration: none;
}
.code-links a:hover { text-decoration: underline; }

/* Setup steps — numbered list in getting-started prose */
.setup-steps {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-left: 0;
  list-style: none;
  counter-reset: steps;
  margin: var(--sp-5) 0;
}
.setup-steps li {
  display: flex;
  gap: var(--sp-3);
  align-items: baseline;
  font-size: var(--sz-body);
  color: rgba(249, 249, 247, 0.6);
  line-height: 1.55;
  counter-increment: steps;
}
.setup-steps li::before {
  content: counter(steps);
  font-family: var(--font-mono);
  font-size: var(--sz-label);
  color: var(--c-accent);
  flex-shrink: 0;
  width: 1.25rem;
  text-align: right;
}
.setup-steps li strong {
  color: rgba(249, 249, 247, 0.9);
  font-weight: 500;
}

/* Right column: code blocks */
.code-blocks { display: flex; flex-direction: column; gap: var(--sp-4); min-width: 0; }
.code-block {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius); overflow: hidden;
}
.code-block-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.45rem var(--sp-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font-family: var(--font-mono); font-size: var(--sz-label);
  color: rgba(249, 249, 247, 0.5);
}
/* UI preview placeholder — browser chrome + gif slot */
.ui-preview {
  margin-top: var(--sp-12);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  overflow: hidden;
}
.ui-preview-chrome {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem var(--sp-4);
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font-family: var(--font-mono);
  font-size: var(--sz-label);
}
.ui-chrome-dot {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}
.ui-preview-body {
  background: rgba(255, 255, 255, 0.03);
  display: block;
}
.ui-preview-label {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--sz-label);
  color: rgba(249, 249, 247, 0.55);
  white-space: nowrap;
  pointer-events: none;
}
.ui-preview-steps {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  counter-reset: ui-steps;
}
.ui-preview-steps span {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--sz-label);
  color: rgba(249, 249, 247, 0.55);
  counter-increment: ui-steps;
}
.ui-preview-steps span::before {
  content: counter(ui-steps);
  color: rgba(249, 249, 247, 0.5);
  flex-shrink: 0;
  width: 1rem;
  text-align: right;
}
.ui-preview-body img {
  display: block;
  width: 100%;
  height: auto;
}

.code-block pre {
  padding: var(--sp-5) var(--sp-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--sz-code);
  line-height: 1.75;
  color: rgba(249, 249, 247, 0.85);
  tab-size: 2;
}

/* Syntax tokens — minimal, purposeful */
.cc  { color: rgba(249, 249, 247, 0.5);  } /* comment  */
.cmd { color: #93c5fd; }                    /* command  */
.key { color: #86efac; }                    /* key      */
.val { color: #fde68a; }                    /* value    */
.str { color: #fca5a5; }                    /* string   */

/* Open source shelf — bottom of capabilities section */
.oss-shelf {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  border-top: 1px solid var(--c-border);
  padding-top: var(--sp-8);
  margin-top: var(--sp-8);
  flex-wrap: wrap;
}
.oss-shelf > p {
  font-size: var(--sz-label);
  color: var(--c-text);
  flex: 1;
}
.capabilities .oss-shelf > p {
  color: var(--c-muted);
}

.oss-meta {
  font-family: var(--font-mono);
  font-size: var(--sz-label);
  color: var(--c-muted);
  letter-spacing: 0.01em;
}

/* Copy grid — adapts to however many items are present */
.oss-copy { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-8); }
.oss-item h3 {
  font-size: var(--sz-body); font-weight: 600;
  color: var(--c-text); margin-bottom: var(--sp-2); letter-spacing: -0.01em;
}
.oss-item p { font-size: var(--sz-body); color: var(--c-muted); line-height: 1.6; }
.oss-item a { color: var(--c-accent); font-weight: 500; text-decoration: none; }
.oss-item a:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   Open Enterprise
   -------------------------------------------------------------------------- */
.open-enterprise {
  background: var(--c-dark);
  color: #f9f9f7;
  border-bottom-color: transparent;
}
.open-enterprise .section-header {
  color: #f9f9f7;
  font-size: var(--sz-display);
  letter-spacing: -0.025em;
  line-height: 1.1;
  max-width: 800px;
  margin-bottom: var(--sp-6);
}
.open-enterprise .btn-ghost,
.code-section .btn-ghost {
  color: rgba(249, 249, 247, 0.75);
  border-color: rgba(255, 255, 255, 0.2);
}
.open-enterprise .btn-ghost:hover,
.code-section .btn-ghost:hover {
  color: #f9f9f7;
  border-color: rgba(255, 255, 255, 0.5);
}
.oe-sub {
  font-size: var(--sz-body);
  color: rgba(249, 249, 247, 0.55);
  max-width: 560px;
  line-height: 1.65;
  margin-bottom: var(--sp-10);
}
.oe-ctas {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-16);
}
.open-enterprise .oss-item h3 { color: #f9f9f7; }
.open-enterprise .oss-item p { color: rgba(249, 249, 247, 0.55); }
.open-enterprise .oss-shelf {
  border-top-color: rgba(255, 255, 255, 0.12);
}
.open-enterprise .oss-shelf > p { color: rgba(249, 249, 247, 0.75); }
.open-enterprise .oss-meta { color: rgba(249, 249, 247, 0.55); }
/* Section header row — headline + CTA on the same line, flush right */
.section-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-8);
  margin-bottom: var(--sp-12);
}
.section-header-row .section-header { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   Credentials
   -------------------------------------------------------------------------- */
.credentials { background: var(--c-surface); }

.credentials-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-8); }

.credential-block { border-top: 2px solid var(--c-border); padding-top: var(--sp-5); }
.credential-block.featured { border-top-color: var(--c-accent); }

.credential-block h3 {
  font-size: var(--sz-label); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--c-muted); margin-bottom: var(--sp-3);
}
.credential-block.featured h3 { color: var(--c-accent); }
.credential-block p {
  font-size: var(--sz-body); color: var(--c-muted); line-height: 1.6; margin-bottom: var(--sp-3);
}
.credential-block p strong { color: var(--c-text); font-weight: 500; }
.cred-link { color: var(--c-accent); font-size: var(--sz-body); font-weight: 500; text-decoration: none; }
.cred-link:hover { text-decoration: underline; }
.cred-meta { font-size: var(--sz-label); color: var(--c-muted); line-height: 1.6; }
.cred-meta strong { font-weight: 600; color: var(--c-text); }

.cncf-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.cncf-tag {
  font-family: var(--font-mono); font-size: var(--sz-label);
  padding: 0.2rem 0.5rem;
  background: var(--c-code-bg); border: 1px solid var(--c-border);
  border-radius: 3px; color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--c-dark);
  color: #f9f9f7;
  padding: var(--sp-16) 0 var(--sp-8);
  border-top: none;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: var(--sp-8);
  padding-bottom: var(--sp-10); margin-bottom: var(--sp-8);
  border-bottom: 1px solid rgba(249, 249, 247, 0.1);
}
.footer-brand { padding-right: var(--sp-8); }
.footer-logo { margin-bottom: var(--sp-4); }
.footer-logo svg { height: 24px; width: auto; }
.footer-logo .logo-wordmark { color: rgba(249, 249, 247, 0.65); }
.footer-brand > p { font-size: var(--sz-body); color: rgba(249, 249, 247, 0.55); line-height: 1.6; max-width: 220px; }

.footer-col h4 {
  font-size: var(--sz-label); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: rgba(249, 249, 247, 0.5); margin-bottom: var(--sp-4);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-col a { font-size: var(--sz-body); color: rgba(249, 249, 247, 0.6); text-decoration: none; transition: color var(--ease); }
.footer-col a:hover { color: #f9f9f7; }
.footer-col a.footer-highlight { color: #f9f9f7; border-bottom: 1px solid rgba(249,249,247,0.5); }
.footer-col a.footer-highlight:hover { color: #f9f9f7; border-bottom-color: #f9f9f7; }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--sp-4);
}
.footer-bottom > p { font-size: var(--sz-label); color: rgba(249, 249, 247, 0.5); }
.footer-bottom-links { display: flex; gap: var(--sp-4); }
.footer-bottom-links a { font-size: var(--sz-label); color: rgba(249, 249, 247, 0.5); text-decoration: none; }
.footer-bottom-links a:hover { color: rgba(249, 249, 247, 0.6); }

/* --------------------------------------------------------------------------
   Community / Roadmap
   -------------------------------------------------------------------------- */
.community { background: var(--c-surface); }

/* Two-column grid: become a contributor | contributors */
.community-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.community-col { display: flex; flex-direction: column; gap: var(--sp-5); }

.community-col-label {
  font-size: var(--sz-label);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  margin: 0;
}

.community-col p {
  font-size: var(--sz-body);
  color: var(--c-muted);
  line-height: 1.65;
  margin: 0;
}

.community-col p a {
  color: var(--c-accent);
  text-decoration: none;
  font-weight: 500;
}

.community-col p a:hover { text-decoration: underline; }

/* Contributor avatars */
.contributor-avatars {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
}

.contributor-avatars a img {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--c-surface);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.contributor-avatars a:hover img {
  transform: scale(1.15);
  border-color: var(--c-accent);
}

.contributor-all-link {
  font-size: var(--sz-body);
  font-weight: 500;
  color: var(--c-accent);
  text-decoration: none;
  margin-left: 3px;
}

.contributor-all-link:hover { text-decoration: underline; }


/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .credentials-grid { grid-template-columns: 1fr 1fr; }
  .code-panel-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; padding-right: 0; }
  .footer-brand > p { max-width: 100%; }
}

@media (max-width: 768px) {
  :root { --gutter: 1.25rem; }
  section { padding-block: var(--sp-12); }
  .hero { padding-block: var(--sp-16) var(--sp-12); }
  .hero-tagline { font-size: clamp(1.875rem, 8vw, 2.5rem); }
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .site-nav { display: none; }
  .section-header-row { flex-direction: column; align-items: flex-start; gap: var(--sp-5); }
  .cncf-shelf { flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
  .left-tabs { grid-template-columns: 1fr; }
  .left-tab-nav {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    overflow-x: auto;
  }
  .left-tab-btn {
    flex: 1; flex-direction: column; align-items: flex-start;
    gap: 0.2rem; padding: var(--sp-4); border-top: none;
    border-left: none; border-bottom: 2px solid transparent; min-width: 100px;
  }
  .left-tab-btn.active { border-bottom-color: var(--c-accent); border-left-color: transparent; }
  .code-section .left-tab-nav { border-bottom-color: rgba(255, 255, 255, 0.12); }
  .code-section .left-tab-btn { border-bottom-color: transparent; }
  .code-section .left-tab-btn.active { border-bottom-color: #f9f9f7; border-left-color: transparent; }
  .demo-slide-inner--code { grid-template-columns: 1fr; }
  .demo-slide-code { border-left: none; border-top: 1px solid var(--c-border); }
  .demo-nav-btn { flex-direction: column; align-items: flex-start; gap: 0.2rem; padding: var(--sp-3) var(--sp-4); }
  .agent-cols { grid-template-columns: 1fr; }
  .stack-items { grid-template-columns: 1fr; }
  .component-grid { grid-template-columns: 1fr 1fr; }
  .oss-copy { grid-template-columns: 1fr; }
  .community-cols { grid-template-columns: 1fr; }
  .credentials-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-header { max-width: 100%; }
}

@media (max-width: 400px) {
  .footer-grid { grid-template-columns: 1fr; }
  .component-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  /* Banner: left-align, drop the date/session detail */
  .banner p { text-align: left; }
  .banner .container { justify-content: flex-start; }
  .banner-detail { display: none; }

  /* Header GitHub link: swap "GitHub" text for logo-only to give star count room */
  .github-link span:not(.star-count) { display: none; }

  /* OSS shelf: stack items and left-align instead of horizontal row */
  .oss-shelf { flex-direction: column; align-items: flex-start; gap: var(--sp-4); }

  /* Hide verbose stats line in community/roadmap shelf */
  .community .oss-meta { display: none; }
}

/* --------------------------------------------------------------------------
   Cookie consent bar
   -------------------------------------------------------------------------- */
.cookie-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #383838;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.25);
  padding: var(--sp-4) 0;
  z-index: 9000;
  animation: cookie-slide-up 200ms ease both;
}
@keyframes cookie-slide-up {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.cookie-bar-inner {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  flex-wrap: wrap;
}
.cookie-bar-text {
  flex: 1;
  font-size: var(--sz-body);
  color: rgba(249, 249, 247, 0.75);
  line-height: 1.5;
  min-width: 200px;
}
.cookie-bar-link {
  color: rgba(249, 249, 247, 0.75);
  text-underline-offset: 2px;
}
.cookie-bar-link:hover { color: #f9f9f7; }
.cookie-bar-actions {
  display: flex;
  gap: var(--sp-3);
  flex-shrink: 0;
}
.cookie-bar .btn-ghost {
  color: rgba(249, 249, 247, 0.75);
  border-color: rgba(255, 255, 255, 0.2);
}
.cookie-bar .btn-ghost:hover {
  color: #f9f9f7;
  border-color: rgba(255, 255, 255, 0.5);
}
@media (max-width: 540px) {
  .cookie-bar-inner { flex-direction: column; align-items: flex-start; gap: var(--sp-4); }
  .cookie-bar-actions { width: 100%; }
  .cookie-bar-actions .btn { flex: 1; text-align: center; }
}