:root {
  --space-blue: #001941;
  --white: #ffffff;
  --tech-blue: #006fee;
  --sky: #78e1ff;
  --neon-red: #f03c00;
  --sunset: #fa9600;
  --emerald: #00c864;
  --mint: #64faaa;
  --violet: #7d00e1;
  --grey-06: #1a1a1a;
  --grey-05: #383838;
  --grey-04: #6d6d6d;
  --grey-03: #999999;
  --grey-02: #cccccc;
  --grey-01: #f2f2f2;

  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Menlo', 'Consolas', monospace;

  --container: 1024px;
  --prose: 60ch;

  --radius-button: 2px;
  --radius-card: 4px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--grey-06);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--tech-blue);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--tech-blue);
  outline-offset: 2px;
}

h1, h2, h3 {
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

p {
  margin: 0 0 16px;
  max-width: var(--prose);
}

ul, ol {
  margin: 0 0 16px;
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
  max-width: var(--prose);
}

li:last-child { margin-bottom: 0; }

mark {
  background: var(--mint);
  color: var(--grey-06);
  padding: 0 4px;
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.95em;
}

code {
  font-family: var(--font-mono);
  font-size: 0.95em;
  background: var(--grey-01);
  color: var(--grey-06);
  padding: 2px 6px;
}

/* Header / hero */

.hero {
  background: var(--space-blue);
  color: var(--white);
  padding: 32px 0 48px;
}

.hero__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero__brand-link {
  display: inline-block;
  line-height: 0;
}

.hero__logo {
  height: 32px;
  width: auto;
  display: block;
}

.hero__github {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.hero__github:hover,
.hero__github:focus-visible {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
}

.hero__github-icon {
  display: block;
  flex-shrink: 0;
}

.hero__eyebrow {
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sky);
  margin-bottom: 8px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: 16px;
  max-width: 16ch;
}

.hero__lede {
  color: var(--grey-02);
  font-size: 1.125rem;
  max-width: 56ch;
}

/* Progress indicator */

.steps {
  list-style: none;
  display: flex;
  gap: 8px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px 24px 32px;
}

.steps__item {
  flex: 1;
  margin: 0;
  max-width: none;
}

.steps__dot {
  display: block;
  height: 4px;
  background: var(--grey-02);
}

.steps__item[data-state="active"] .steps__dot {
  background: var(--tech-blue);
}

.steps__item[data-state="complete"] .steps__dot {
  background: var(--emerald);
}

.steps__label {
  display: block;
  font-size: 0.8125rem;
  margin-top: 8px;
  color: var(--grey-04);
  font-weight: 500;
}

.steps__item[data-state="active"] .steps__label {
  color: var(--grey-06);
}

/* Main / sections */

main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.section {
  display: none;
}

.section[data-active="true"] {
  display: block;
}

.section__intro {
  margin-bottom: 32px;
}

.section__intro p {
  font-size: 1.0625rem;
  color: var(--grey-05);
}

/* Code blocks */

.codeblock {
  position: relative;
  background: var(--grey-06);
  color: var(--white);
  margin: 0 0 16px;
  border-radius: var(--radius-card);
  overflow: hidden;
}

.codeblock pre {
  margin: 0;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.codeblock pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.codeblock__copy {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--grey-05);
  color: var(--white);
  border: 1px solid var(--grey-04);
  padding: 6px 12px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-button);
  transition: background-color 0.15s ease;
}

.codeblock__copy:hover {
  background: var(--grey-04);
}

.codeblock__copy[data-copied="true"] {
  background: var(--emerald);
  border-color: var(--emerald);
  color: var(--space-blue);
}

/* Callouts */

.callout {
  border-left: 4px solid var(--sunset);
  background: #fff5e8;
  padding: 16px 20px;
  margin: 0 0 24px;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}

.callout--tip {
  border-left-color: var(--sky);
  background: #e8f7fe;
}

.callout p {
  margin: 0;
  max-width: none;
}

.callout strong {
  font-weight: 500;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--tech-blue);
  color: var(--white);
  border: 2px solid var(--tech-blue);
  padding: 12px 24px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  border-radius: var(--radius-button);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--space-blue);
  border-color: var(--space-blue);
  text-decoration: none;
}

.btn--ghost {
  background: transparent;
  color: var(--grey-06);
  border-color: var(--grey-02);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--grey-01);
  border-color: var(--grey-04);
  color: var(--grey-06);
}

.section__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--grey-01);
}

.next-steps {
  margin-top: 48px;
  padding: 24px;
  border: 1px solid var(--grey-01);
  background: var(--grey-005, #fafafa);
}

.next-steps h3 {
  margin: 0 0 8px;
}

.next-steps p {
  margin: 0;
}

/* Feature picker (step 1) */

.featurelist {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

@media (min-width: 640px) {
  .featurelist {
    grid-template-columns: 1fr 1fr;
  }
}

.featurelist > li {
  margin: 0;
  max-width: none;
}

.featurelist label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--white);
  border: 2px solid var(--grey-02);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  height: 100%;
}

.featurelist label:hover {
  border-color: var(--tech-blue);
}

.featurelist input[type="checkbox"] {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  cursor: pointer;
  accent-color: var(--tech-blue);
}

.featurelist label:has(input:checked) {
  border-color: var(--tech-blue);
  background: #f4f9ff;
}

.featurelist__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.featurelist__title {
  font-weight: 500;
  color: var(--grey-06);
  font-size: 1rem;
}

.featurelist__desc {
  font-size: 0.875rem;
  color: var(--grey-04);
  line-height: 1.4;
}

/* Tabs (step 2) */

.tabs {
  margin-bottom: 24px;
}

.tabs__list {
  display: flex;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  border-bottom: 2px solid var(--grey-01);
}

.tabs__item {
  margin: 0;
}

.tabs__btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  padding: 12px 20px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  color: var(--grey-04);
  cursor: pointer;
}

.tabs__btn[aria-selected="true"] {
  color: var(--space-blue);
  border-bottom-color: var(--tech-blue);
}

.tabs__panel {
  display: none;
}

.tabs__panel[data-active="true"] {
  display: block;
}

/* Collapsible */

details.collapsible {
  margin: 24px 0;
  border: 1px solid var(--grey-02);
  border-radius: var(--radius-card);
  overflow: hidden;
}

details.collapsible > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 500;
  background: var(--grey-01);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

details.collapsible > summary::-webkit-details-marker {
  display: none;
}

details.collapsible > summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--grey-04);
}

details.collapsible[open] > summary::after {
  content: '−';
}

details.collapsible > div {
  padding: 16px 20px;
}

/* Agent grid */

.agents {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .agents {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .agents {
    grid-template-columns: repeat(3, 1fr);
  }
}

.agents__item {
  margin: 0;
  max-width: none;
}

.agents__card {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 24px;
  background: var(--white);
  border: 2px solid var(--grey-02);
  border-radius: var(--radius-card);
  font-family: var(--font-body);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.agents__card:hover,
.agents__card:focus-visible {
  border-color: var(--tech-blue);
  transform: translateY(-2px);
}

.agents__icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  color: var(--space-blue);
}

.agents__icon svg {
  width: 100%;
  height: 100%;
}

.agents__card:hover .agents__icon,
.agents__card:focus-visible .agents__icon {
  color: var(--tech-blue);
}

.agents__name {
  font-weight: 500;
  font-size: 1.125rem;
  color: var(--space-blue);
  margin: 0;
}

.agents__blurb {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--grey-04);
  max-width: none;
}

/* Agent detail */

.agent-detail {
  display: none;
}

.agent-detail[data-active="true"] {
  display: block;
}

.agent-detail__header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--grey-01);
}

.agent-detail__header svg {
  width: 32px;
  height: 32px;
  color: var(--space-blue);
}

.agent-detail__header h2 {
  margin: 0;
}

.steps-list {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0 0 32px;
}

.steps-list > li {
  counter-increment: step;
  position: relative;
  padding-left: 56px;
  margin-bottom: 32px;
  max-width: none;
}

.steps-list > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tech-blue);
  color: var(--white);
  font-weight: 500;
  font-family: var(--font-body);
  border-radius: var(--radius-card);
}

.steps-list h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.steps-list p {
  max-width: none;
}

.steps-list code {
  word-break: break-all;
}

/* Figure / screenshot placeholders */

figure {
  margin: 16px 0;
  padding: 0;
}

figure img {
  width: 100%;
  border: 1px solid var(--grey-02);
  border-radius: var(--radius-card);
  background: var(--grey-01);
}

figure figcaption {
  font-size: 0.875rem;
  color: var(--grey-04);
  margin-top: 8px;
}

figure.placeholder {
  background: var(--grey-01);
  border: 2px dashed var(--grey-02);
  border-radius: var(--radius-card);
  padding: 48px 24px;
  text-align: center;
  color: var(--grey-04);
  font-size: 0.875rem;
}

/* Troubleshooting */

.troubleshoot {
  background: var(--grey-01);
  padding: 24px;
  border-radius: var(--radius-card);
  margin: 32px 0;
}

.troubleshoot h3 {
  margin-top: 0;
}

.troubleshoot dl {
  margin: 0;
}

.troubleshoot dt {
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  margin-top: 12px;
}

.troubleshoot dt:first-child { margin-top: 0; }

.troubleshoot dd {
  margin: 4px 0 0;
  color: var(--grey-05);
}

/* Endpoint table */

.endpoint {
  background: var(--grey-01);
  padding: 20px 24px;
  border-radius: var(--radius-card);
  margin: 24px 0;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
}

.endpoint dt {
  font-weight: 500;
  color: var(--grey-04);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.endpoint dd {
  margin: 0 0 16px;
  color: var(--grey-06);
}

.endpoint dd:last-child { margin-bottom: 0; }

/* Footer */

footer.site-footer {
  border-top: 1px solid var(--grey-01);
  padding: 32px 24px;
  text-align: center;
  color: var(--grey-04);
  font-size: 0.875rem;
}

footer.site-footer p {
  margin: 0 auto;
  max-width: none;
}

footer.site-footer a {
  color: var(--grey-04);
  text-decoration: underline;
}

/* Reduced motion */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* Larger screens */

@media (min-width: 768px) {
  .hero {
    padding: 48px 0 72px;
  }
  h1 { font-size: 3rem; }
  h2 { font-size: 2rem; }
  .steps__label { font-size: 0.875rem; }
}