:root {
  color-scheme: dark;
  --cp-bg: #0f1117;
  --cp-bg-elevated: #141720;
  --cp-surface: #1a1d26;
  --cp-surface-soft: #22262f;
  --cp-surface-hover: #282d38;
  --cp-sidebar: #141720;
  --cp-border: #2e3341;
  --cp-border-strong: #485064;
  --cp-text: #e4e4e7;
  --cp-heading: #f4f4f5;
  --cp-text-muted: #a1a1aa;
  --cp-text-soft: #c2c4cc;
  --cp-accent: #0c9ce7;
  --cp-accent-hover: #36b5f6;
  --cp-accent-soft: rgba(12, 156, 231, 0.14);
  --cp-accent-fg: #07131c;
  --cp-success: #4ade80;
  --cp-danger: #f87171;
  --cp-warning: #fbbf24;
  --cp-link: #36b5f6;
  --cp-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  --cp-overlay: rgba(5, 7, 12, 0.76);
  --cp-panel: rgba(26, 29, 38, 0.92);
  --cp-panel-strong: #1a1d26;
  --cp-sheen: rgba(255, 255, 255, 0.04);
  --cp-highlight: rgba(12, 156, 231, 0.16);
}
html[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 18% 0%, var(--cp-highlight), transparent 32rem),
    var(--cp-bg);
  color: var(--cp-text);
  font-family: Inter, "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: -0.006em;
  margin: 0;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--cp-link);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--cp-accent);
  outline-offset: 3px;
}

.skip-link {
  background: var(--cp-accent);
  color: var(--cp-accent-fg);
  left: 1rem;
  padding: 0.75rem 1rem;
  position: fixed;
  top: -5rem;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  align-items: center;
  background: var(--cp-sidebar);
  border-bottom: 1px solid var(--cp-border);
  display: flex;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 5vw, 5rem);
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  align-items: center;
  color: var(--cp-text);
  display: inline-flex;
  font-weight: 700;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--cp-surface);
  border: 1px solid var(--cp-border);
  border-radius: 0.8rem;
  color: var(--cp-accent);
  display: inline-flex;
  font-size: 0.8rem;
  font-weight: 900;
  height: 2.35rem;
  justify-content: center;
  letter-spacing: 0.16em;
  padding-left: 0.16em;
  width: 2.35rem;
}

nav {
  display: flex;
  gap: 1rem;
}

nav a,
.footer-links a {
  border-radius: 0.6rem;
  color: var(--cp-text-muted);
  font-size: 0.9rem;
  padding: 0.45rem 0.65rem;
  text-decoration: none;
}

nav a:hover,
.footer-links a:hover {
  background: var(--cp-accent-soft);
  color: var(--cp-accent);
}

main {
  overflow: hidden;
}

.hero,
.section,
footer {
  margin-inline: auto;
  max-width: 76rem;
  padding: clamp(4rem, 9vw, 8rem) clamp(1rem, 5vw, 4rem);
}

.hero {
  min-height: 72vh;
}

.eyebrow {
  color: var(--cp-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin: 0 0 1rem;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--cp-heading);
}

h1 {
  font-size: clamp(3rem, 8vw, 6.75rem);
  letter-spacing: -0.06em;
  line-height: 0.95;
  max-width: 13ch;
}

h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.045em;
  line-height: 1;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.2;
}

.hero-copy,
.section-heading > p:last-child {
  color: var(--cp-text-soft);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.65;
  max-width: 46rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0;
}

.button {
  border: 1px solid var(--cp-border-strong);
  border-radius: 0.625rem;
  color: var(--cp-text);
  display: inline-flex;
  font-weight: 650;
  padding: 0.8rem 1rem;
  text-decoration: none;
}

.button:hover {
  background: var(--cp-surface-hover);
  border-color: var(--cp-accent);
}

.button-primary {
  background: var(--cp-accent);
  border-color: var(--cp-accent);
  color: var(--cp-accent-fg);
}

.button-primary:hover {
  background: var(--cp-accent-hover);
  color: var(--cp-accent-fg);
}

.stage-note {
  background: var(--cp-accent-soft);
  border: 1px solid var(--cp-border);
  border-radius: 0.625rem;
  color: var(--cp-text-soft);
  line-height: 1.5;
  max-width: 44rem;
  padding: 1rem;
}

.stage-note strong {
  color: var(--cp-text);
}

.section {
  border-top: 1px solid var(--cp-border);
}

.section-surface {
  background: var(--cp-bg-elevated);
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  box-shadow: var(--cp-shadow);
  margin-block: 2rem;
}

.section-heading {
  max-width: 48rem;
}

.principles-grid,
.roles-grid,
.faq-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}

.principles-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principle,
.role,
details {
  background: var(--cp-surface);
  border: 1px solid var(--cp-border);
  border-radius: 16px;
  box-shadow: var(--cp-shadow);
  padding: 1.5rem;
  transition: border-color 150ms ease, transform 150ms ease;
}

.principle:hover,
.role:hover,
details:hover {
  border-color: var(--cp-border-strong);
  transform: translateY(-2px);
}

.principle > span {
  color: var(--cp-accent);
  font-family: Consolas, "Courier New", Courier, monospace;
  font-size: 0.8rem;
}

.principle p,
.role p,
.role li,
details p,
footer p {
  color: var(--cp-text-soft);
  line-height: 1.6;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.filter {
  background: var(--cp-surface);
  border: 1px solid var(--cp-border);
  border-radius: 999px;
  color: var(--cp-text-muted);
  cursor: pointer;
  font: inherit;
  padding: 0.55rem 0.8rem;
}

.filter:hover,
.filter.is-active {
  background: var(--cp-accent-soft);
  border-color: var(--cp-accent);
  color: var(--cp-accent);
}

.noscript-note {
  color: var(--cp-text-soft);
  margin-block: 1rem 0;
}

.roles-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.role {
  display: flex;
  flex-direction: column;
}

.role[hidden] {
  display: none;
}

.role-priority {
  border-color: var(--cp-accent);
}

.role-meta {
  align-items: center;
  color: var(--cp-text-muted);
  display: flex;
  font-size: 0.78rem;
  gap: 0.75rem;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.status {
  background: var(--cp-accent-soft);
  border: 1px solid var(--cp-border);
  border-radius: 999px;
  color: var(--cp-accent);
  padding: 0.3rem 0.55rem;
}

.role ul {
  margin: auto 0 0;
  padding-left: 1.2rem;
}

.readiness-list {
  display: grid;
  gap: 0.75rem;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.readiness-list li {
  background: var(--cp-surface);
  border-left: 4px solid var(--cp-accent);
  border-radius: 0.625rem;
  color: var(--cp-text-soft);
  line-height: 1.6;
  padding: 1rem 1.25rem;
}

.readiness-list strong {
  color: var(--cp-text);
}

.faq-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

summary {
  cursor: pointer;
  font-weight: 700;
}

details p {
  margin: 1rem 0 0;
}

footer {
  align-items: flex-start;
  border-top: 1px solid var(--cp-border);
  display: flex;
  justify-content: space-between;
  padding-block: 3rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: flex-end;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
  }

  .principles-grid,
  .roles-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .section-surface {
    border-inline: 0;
    border-radius: 0;
  }

  footer {
    display: block;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}