body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: #fff;
  color: #374151;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 56px;
  position: relative;
}

.site-header__logo {
  color: #111827;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  flex-shrink: 0;
}

.main-nav {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 1.25rem;
  z-index: 200;
  width: min(320px, calc(100vw - 2rem));
  margin-left: 0;
  padding: 0.75rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.main-nav.is-open {
  display: block;
}

.main-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.2rem;
}

.main-nav__item + .main-nav__item {
  margin-top: 0.25rem;
}

.main-nav__group-title {
  margin: 0;
  padding: 0.45rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #6b7280;
}

.main-nav__group-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav__link {
  display: block;
  padding: 0.55rem 0.75rem;
  border: 0;
  border-radius: 6px;
  background: none;
  color: #374151;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  white-space: normal;
}

.main-nav__link:hover,
.main-nav__link:focus-visible,
.main-nav__link[aria-current="page"] {
  background: #f3f4f6;
  color: #111827;
}

.main-nav__link--accent {
  background: #f0fdf4;
  color: #16a34a;
  font-weight: 600;
}

.main-nav__link--child {
  padding-left: 1rem;
}

.main-nav__link--accent:hover,
.main-nav__link--accent:focus-visible {
  background: #dcfce7;
  color: #15803d;
}

.nav-toggle {
  display: flex;
  margin-left: auto;
  padding: 10px;
  border: 0;
  border-radius: 6px;
  background: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle:hover {
  background: #f3f4f6;
}

.nav-toggle:focus-visible {
  outline: 2px solid #16a34a;
  outline-offset: 2px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: #111827;
  border-radius: 2px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-toggle span {
  transition: transform 160ms ease, opacity 160ms ease;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1rem 0 2rem;
}

.hero-copy h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.problem-statement {
  font-size: 1.05rem;
  color: #374151;
}

.email-capture,
.stack-card,
.capability-card {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 1rem;
  background: #fff;
}

.email-capture h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.email-capture iframe {
  width: 100%;
  border: 0;
}

.stack-grid,
.capability-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stack-card h3,
.capability-card h3 {
  margin-top: 0;
}

.home-footer {
  margin: 2rem 0 0.5rem;
  font-size: 0.95rem;
}

.stack-page {
  margin: 1rem 0 2rem;
}

.stack-hero {
  margin-bottom: 1.5rem;
}

.stack-kicker {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.stack-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.stack-actions img {
  vertical-align: middle;
}

.stack-section {
  margin-bottom: 1.25rem;
}

.stack-card h2 {
  margin-top: 0;
}

.stack-card ul,
.stack-card ol {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.stack-command-list li + li,
.stack-feature-list li + li,
.compose-list li + li {
  margin-top: 0.5rem;
}

.stack-command-list code {
  display: inline-block;
  white-space: pre-wrap;
}

.stack-screenshot {
  display: flex;
  flex-direction: column;
}

.screenshot-placeholder {
  display: grid;
  place-items: center;
  min-height: 220px;
  border: 1px dashed #9ca3af;
  border-radius: 10px;
  padding: 1rem;
  background: linear-gradient(135deg, #f9fafb, #e5e7eb);
  text-align: center;
  color: #4b5563;
}

.stack-link {
  text-decoration: none;
}

.stack-link:hover,
.stack-link:focus,
.stack-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

@media (max-width: 767px) {
  .hero-copy {
    order: 2;
  }

  .email-capture {
    order: 1;
  }

  .hero-layout,
  .stack-grid,
  .capability-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .main-nav {
    left: 0.75rem;
    right: 0.75rem;
    width: auto;
  }

  .main-nav__link {
    width: 100%;
    text-align: left;
  }
}

@media (max-width: 400px) {
  .site-header__inner {
    padding: 0 0.75rem;
    gap: 0.5rem;
  }

  .site-header__logo {
    font-size: 1rem;
  }

  .main-nav {
    left: 0.5rem;
    right: 0.5rem;
    width: auto;
    padding: 0.6rem;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background: #111827;
    color: #e5e7eb;
  }

  a {
    color: #93c5fd;
  }

  .email-capture,
  .stack-card,
  .capability-card {
    background: #1f2937;
    border-color: #374151;
  }

  .screenshot-placeholder {
    background: linear-gradient(135deg, #111827, #1f2937);
    border-color: #4b5563;
    color: #d1d5db;
  }

  .site-header {
    background: #111827;
    border-bottom-color: #374151;
  }

  .site-header__logo,
  .main-nav__link {
    color: #e5e7eb;
  }

  .main-nav__group-title {
    color: #9ca3af;
  }

  .main-nav__link:hover,
  .main-nav__link:focus-visible,
  .main-nav__link[aria-current="page"] {
    color: #fff;
    background: #1f2937;
  }

  .main-nav {
    background: #111827;
    border-color: #374151;
  }

  .nav-toggle span {
    background: #e5e7eb;
  }

  .nav-toggle:hover {
    background: #1f2937;
  }
}

.cta-button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  margin-top: 1rem;
  background: #16a34a;
  color: #fff;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: background 160ms ease;
}

.cta-button:hover,
.cta-button:focus-visible {
  background: #15803d;
}

.cta-button--secondary {
  background: transparent;
  color: #16a34a;
  border: 2px solid #16a34a;
}

.cta-button--secondary:hover,
.cta-button--secondary:focus-visible {
  background: #f0fdf4;
  color: #15803d;
  border-color: #15803d;
}

.try-now {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f0fdf4;
  text-align: center;
}

.try-now h2 {
  margin-top: 0;
}

.try-now__commands {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.try-now__command {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  font-size: 0.95rem;
}

@media (prefers-color-scheme: dark) {
  .try-now {
    background: #1f2937;
    border-color: #374151;
  }
  .try-now__command {
    background: #111827;
    border-color: #374151;
  }
}

.guide-meta {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  background: #f9fafb;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.guide-meta__read-time {
  margin: 0;
  font-size: 0.9rem;
  color: #4b5563;
}

.guide-meta__next {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .guide-meta {
    background: #1f2937;
    border-color: #374151;
  }
  .guide-meta__read-time {
    color: #9ca3af;
  }
}

.dojo-callout {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: linear-gradient(135deg, #fefce8, #f0fdf4);
  text-align: center;
}

.dojo-callout h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.dojo-callout p {
  font-size: 1rem;
  margin: 0.5rem 0;
}

@media (prefers-color-scheme: dark) {
  .cta-button--secondary {
    color: #4ade80;
    border-color: #4ade80;
  }

  .cta-button--secondary:hover,
  .cta-button--secondary:focus-visible {
    background: #1f2937;
    color: #86efac;
    border-color: #86efac;
  }

  .dojo-callout {
    background: linear-gradient(135deg, #1c1917, #1f2937);
    border-color: #374151;
  }

  .guide-meta__next a {
    color: #93c5fd;
  }
}

/* Typography scale — Sprint 1 */

h1 {
  font-size: 2rem;
  line-height: 1.2;
  color: #111827;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.3;
  color: #111827;
}

h3 {
  font-size: 1.125rem;
  line-height: 1.4;
  color: #111827;
}

code {
  font-size: 0.9em;
}

pre code {
  font-size: 0.875rem;
}

.maintainer-bio {
  margin: 2rem 0 1rem;
  font-size: 0.95rem;
  color: #6b7280;
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1.05rem;
  }
}

/* Sprint 2 — Component Styling */

/* Card hover states */
.stack-card,
.capability-card,
.email-capture,
.dojo-callout {
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.stack-card:hover,
.capability-card:hover {
  border-color: #16a34a;
  box-shadow: 0 2px 8px rgba(22, 163, 74, 0.12);
}

/* Code block styles */
code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

pre {
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-left: 3px solid #16a34a;
  border-radius: 4px;
  padding: 16px;
  font-size: 0.875rem;
  line-height: 1.5;
  overflow-x: auto;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

/* Badge CSS pills */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
  vertical-align: middle;
}

.badge--live {
  background: #dcfce7;
  color: #16a34a;
}

.badge--coming-soon {
  background: #fef3c7;
  color: #d97706;
}

/* Focus rings */
a:focus-visible {
  outline: 2px solid #16a34a;
  outline-offset: 2px;
}

.cta-button:focus-visible {
  outline: 2px solid #16a34a;
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0s !important;
  }
}

@media (prefers-color-scheme: dark) {
  pre {
    background: #1f2937;
    border-color: #374151;
  }

  .badge--live {
    background: #064e3b;
    color: #34d399;
  }

  .badge--coming-soon {
    background: #451a03;
    color: #fbbf24;
  }
}

/* Sprint 3 — Navigation & Layout */

/* Breadcrumbs */
.breadcrumbs {
  margin: 1rem 0;
  font-size: 0.875rem;
}

.breadcrumbs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.25rem;
  color: #9ca3af;
}

.breadcrumbs__item a {
  color: #6b7280;
  text-decoration: none;
}

.breadcrumbs__item a:hover {
  color: #16a34a;
  text-decoration: underline;
}

.breadcrumbs__item--current {
  color: #111827;
  font-weight: 500;
}

/* 404 page */
.error-page {
  text-align: center;
  padding: 4rem 1rem;
}

.error-page h1 {
  margin-bottom: 0.5rem;
}

.error-page p {
  color: #6b7280;
  margin-bottom: 2rem;
}

.error-page__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.error-page__links a {
  padding: 0.5rem 1rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  color: #374151;
  text-decoration: none;
  font-size: 0.95rem;
  transition: border-color 150ms ease, background 150ms ease;
}

.error-page__links a:hover {
  border-color: #16a34a;
  background: #f0fdf4;
  color: #16a34a;
}

/* Nav transition */
.main-nav {
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 150ms ease, transform 150ms ease;
}

.main-nav.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Active nav state */
.main-nav__link[aria-current="page"] {
  background: #f0fdf4;
  color: #16a34a;
  font-weight: 600;
}

/* Guide meta back link */
.guide-meta__left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.guide-meta__back {
  color: #6b7280;
  text-decoration: none;
  font-size: 0.9rem;
}

.guide-meta__back:hover {
  color: #16a34a;
}

@media (prefers-color-scheme: dark) {
  .breadcrumbs__item a {
    color: #9ca3af;
  }

  .breadcrumbs__item a:hover {
    color: #4ade80;
  }

  .breadcrumbs__item--current {
    color: #e5e7eb;
  }

  .error-page__links a {
    border-color: #374151;
    color: #e5e7eb;
  }

  .error-page__links a:hover {
    border-color: #4ade80;
    background: #1f2937;
    color: #4ade80;
  }

  .main-nav__link[aria-current="page"] {
    background: #064e3b;
    color: #4ade80;
  }

  .guide-meta__back {
    color: #9ca3af;
  }

  .guide-meta__back:hover {
    color: #4ade80;
  }
}

/* Sprint 4 — Content */

/* Capability map: 2-col layout */
.capability-map {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.capability-map__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.25rem;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
}

.capability-map__row:hover {
  border-color: #16a34a;
}

.capability-map__capability h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.capability-map__capability p {
  margin: 0;
  font-size: 0.95rem;
  color: #374151;
}

.capability-map__stacks {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Blog section heading */
.post-list-heading {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #e5e7eb;
}

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-meta {
  font-size: 0.875rem;
  color: #6b7280;
}

.post-link {
  text-decoration: none;
}

.post-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

@media (max-width: 640px) {
  .capability-map__row {
    grid-template-columns: 1fr;
  }

  .capability-map__stacks {
    justify-content: flex-start;
  }
}

@media (prefers-color-scheme: dark) {
  .capability-map__row {
    background: #1f2937;
    border-color: #374151;
  }

  .capability-map__row:hover {
    border-color: #4ade80;
  }

  .capability-map__capability p {
    color: #d1d5db;
  }

  .post-list-heading {
    border-top-color: #374151;
  }
}

/* Sprint 5 — Dark mode polish + stack differentiation */

/* Per-stack accent colors */
.stack-hero--blue {
  border-left: 4px solid #2563eb;
  padding-left: 1rem;
}

.stack-hero--purple {
  border-left: 4px solid #7c3aed;
  padding-left: 1rem;
}

.stack-hero--amber {
  border-left: 4px solid #d97706;
  padding-left: 1rem;
}

.stack-hero--red {
  border-left: 4px solid #dc2626;
  padding-left: 1rem;
}

.stack-hero--indigo {
  border-left: 4px solid #4f46e5;
  padding-left: 1rem;
}

/* Missing dark mode rules — body content */
@media (prefers-color-scheme: dark) {
  h1, h2, h3 {
    color: #f3f4f6;
  }

  .home-footer {
    color: #9ca3af;
  }

  .home-footer a {
    color: #9ca3af;
  }

  .home-footer a:hover {
    color: #4ade80;
  }

  .maintainer-bio {
    color: #9ca3af;
  }

  .error-page h1 {
    color: #f3f4f6;
  }

  .error-page p {
    color: #9ca3af;
  }

  .post-meta {
    color: #9ca3af;
  }

  .post-link {
    color: #93c5fd;
  }

  .stack-hero {
    color: #e5e7eb;
  }

  .stack-hero h1 {
    color: #f3f4f6;
  }

  .stack-kicker {
    color: #e5e7eb;
  }

  .stack-actions a {
    color: #93c5fd;
  }

  .stack-card h2 {
    color: #f3f4f6;
  }

  .compose-list a {
    color: #93c5fd;
  }

  .page-heading {
    color: #f3f4f6;
  }
}

/* Tally iframe dark mode — transparent background blends with card */
.email-capture iframe,
.stack-hero .email-capture iframe {
  border: 0;
}

/* Research section */
.research-section {
  margin: 3rem 0;
  padding: 2rem;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.research-section h2 {
  margin-top: 0;
}

.research-section ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.research-section li {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.research-section li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: #16a34a;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .research-section {
    background: #1f2937;
    border-color: #374151;
  }

  .research-section a {
    color: #93c5fd;
  }
}