/* =========================================================
   Shopware Engineering — design system
   Plain, hand-written CSS. No framework, no build step.
   ========================================================= */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --color-canvas: #ffffff;
  --color-canvas-subtle: #f5f6fa;
  --color-surface: #ffffff;
  --color-border: #e3e6ee;
  --color-border-strong: #cbd0dd;
  --color-ink: #14161f;
  --color-ink-soft: #565d6b;
  --color-ink-faint: #8a8f9c;

  --color-primary: #3752e0;
  --color-primary-dark: #2638b0;
  --color-primary-contrast: #ffffff;
  --color-accent: #e8952f;
  --color-accent-soft: #fdf1de;

  --color-code-bg: #12141c;
  --color-code-ink: #e6e8f0;

  --shadow-sm: 0 1px 2px rgba(20, 22, 31, 0.06);
  --shadow-md: 0 6px 20px rgba(20, 22, 31, 0.08);
  --shadow-lg: 0 18px 40px rgba(20, 22, 31, 0.12);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --container: 1180px;
  --content-width: 740px;

  color-scheme: light;
}

:root[data-theme="dark"] {
  --color-canvas: #0e1016;
  --color-canvas-subtle: #151824;
  --color-surface: #171a26;
  --color-border: #262b3b;
  --color-border-strong: #363c50;
  --color-ink: #eef0f6;
  --color-ink-soft: #b3b8c8;
  --color-ink-faint: #7f8496;

  --color-primary: #7f96ff;
  --color-primary-dark: #a4b4ff;
  --color-primary-contrast: #0e1016;
  --color-accent: #f0af5c;
  --color-accent-soft: #2c2416;

  --color-code-bg: #0a0b10;
  --color-code-ink: #dfe2ee;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 40px rgba(0, 0, 0, 0.55);

  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-canvas: #0e1016;
    --color-canvas-subtle: #151824;
    --color-surface: #171a26;
    --color-border: #262b3b;
    --color-border-strong: #363c50;
    --color-ink: #eef0f6;
    --color-ink-soft: #b3b8c8;
    --color-ink-faint: #7f8496;

    --color-primary: #7f96ff;
    --color-primary-dark: #a4b4ff;
    --color-primary-contrast: #0e1016;
    --color-accent: #f0af5c;
    --color-accent-soft: #2c2416;

    --color-code-bg: #0a0b10;
    --color-code-ink: #dfe2ee;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 18px 40px rgba(0, 0, 0, 0.55);

    color-scheme: dark;
  }
}

/* ---------- Reset ---------- */

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

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

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.15s ease, color 0.15s ease;
}

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

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

a:hover {
  text-decoration: underline;
}

ul,
ol {
  padding-left: 1.25em;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top 0.15s ease;
}

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

/* ---------- Layout ---------- */

.wrap {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

main {
  display: block;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--color-canvas) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.85rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-ink);
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.main-nav__links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav__links a {
  color: var(--color-ink-soft);
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav__links a:hover,
.main-nav__links a[aria-current="page"] {
  color: var(--color-ink);
  text-decoration: none;
}

.main-nav__links details {
  position: relative;
}

.main-nav__links summary {
  cursor: pointer;
  list-style: none;
  color: var(--color-ink-soft);
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav__links summary::-webkit-details-marker {
  display: none;
}

.main-nav__links summary:hover {
  color: var(--color-ink);
}

.category-menu {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.6rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  max-height: 70vh;
  overflow-y: auto;
}

.category-menu li a {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
}

.category-menu li a:hover {
  background: var(--color-canvas-subtle);
  color: var(--color-ink);
  text-decoration: none;
}

.category-menu .count {
  color: var(--color-ink-faint);
  font-variant-numeric: tabular-nums;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
}

.icon-btn:hover {
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

.nav-toggle {
  display: none;
}

/* ---------- Buttons / chips ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

.btn--ghost:hover {
  background: var(--color-canvas-subtle);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink-soft);
  background: var(--color-surface);
}

.chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.chip[aria-current="page"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-contrast);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ---------- Hero ---------- */

.hero {
  padding-block: 4.5rem 3.5rem;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(60% 60% at 15% 0%, color-mix(in srgb, var(--color-primary) 12%, transparent), transparent 70%),
    radial-gradient(50% 50% at 100% 10%, color-mix(in srgb, var(--color-accent) 10%, transparent), transparent 70%);
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 1.1rem;
  max-width: 18ch;
}

.hero p {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--color-ink-soft);
  max-width: 60ch;
  margin: 0 0 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.75rem;
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
}

.hero__stat strong {
  display: block;
  font-size: 1.9rem;
  letter-spacing: -0.01em;
}

.hero__stat span {
  color: var(--color-ink-faint);
  font-size: 0.88rem;
}

/* ---------- Sections ---------- */

.section {
  padding-block: 3.5rem;
}

.section--subtle {
  background: var(--color-canvas-subtle);
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.section__head h2 {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
}

.section__head p {
  color: var(--color-ink-soft);
  margin: 0;
  max-width: 60ch;
}

/* ---------- Post grid & cards ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
  font-size: 0.82rem;
  color: var(--color-ink-faint);
}

.post-card__meta .dot::before {
  content: "\2022";
  margin-inline: 0.1rem;
}

.post-card h3 {
  font-size: 1.15rem;
  line-height: 1.35;
  margin: 0 0 0.6rem;
  letter-spacing: -0.005em;
}

.post-card h3 a {
  color: var(--color-ink);
}

.post-card h3 a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.post-card p {
  color: var(--color-ink-soft);
  font-size: 0.93rem;
  margin: 0;
  flex-grow: 1;
}

.post-card__footer {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.83rem;
  color: var(--color-ink-faint);
}

.post-card--featured {
  grid-column: span 2;
}

.post-card--featured h3 {
  font-size: 1.5rem;
}

@media (max-width: 760px) {
  .post-card--featured {
    grid-column: span 1;
  }
}

/* ---------- Category directory ---------- */

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.category-card {
  padding: 1.15rem 1.3rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.category-card:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

.category-card strong {
  color: var(--color-ink);
  font-size: 0.97rem;
  font-weight: 600;
}

.category-card span {
  color: var(--color-ink-faint);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

/* ---------- Breadcrumbs ---------- */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  margin-bottom: 1.5rem;
  list-style: none;
  padding: 0;
}

.breadcrumbs a {
  color: var(--color-ink-faint);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.4rem;
  color: var(--color-border-strong);
}

.breadcrumbs li[aria-current="page"] {
  color: var(--color-ink-soft);
}

/* ---------- Article ---------- */

.article-header {
  padding-block: 3rem 2rem;
  border-bottom: 1px solid var(--color-border);
}

.article-header__inner {
  max-width: var(--content-width);
}

.article-header h1 {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0.9rem 0 1.1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-ink-faint);
  font-size: 0.88rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 3.5rem;
  padding-block: 3rem;
  align-items: start;
}

@media (max-width: 980px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
}

.article-body {
  max-width: var(--content-width);
  font-size: 1.08rem;
}

.article-body > :first-child {
  margin-top: 0;
}

.article-body h2 {
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 1rem;
  scroll-margin-top: 5.5rem;
}

.article-body h3 {
  font-size: 1.2rem;
  margin: 1.9rem 0 0.85rem;
  scroll-margin-top: 5.5rem;
}

.article-body p {
  margin: 0 0 1.25rem;
  color: var(--color-ink);
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.25rem;
  padding-left: 1.4em;
}

.article-body li {
  margin-bottom: 0.4rem;
}

.article-body li > p {
  margin-bottom: 0.4rem;
}

.article-body strong {
  font-weight: 700;
}

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1.3rem;
  border-left: 3px solid var(--color-primary);
  background: var(--color-canvas-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-ink-soft);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
  display: block;
  overflow-x: auto;
}

.article-body th,
.article-body td {
  border: 1px solid var(--color-border);
  padding: 0.55rem 0.8rem;
  text-align: left;
}

.article-body th {
  background: var(--color-canvas-subtle);
  font-weight: 700;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border);
  padding: 0.1em 0.4em;
  border-radius: 5px;
}

.article-body pre {
  background: var(--color-code-bg);
  color: var(--color-code-ink);
  padding: 1.15rem 1.3rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.87rem;
  line-height: 1.6;
  box-shadow: var(--shadow-sm);
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.heading-anchor {
  margin-left: 0.5rem;
  opacity: 0;
  color: var(--color-ink-faint);
  font-weight: 400;
  text-decoration: none;
  font-size: 0.85em;
}

.article-body h2:hover .heading-anchor,
.article-body h3:hover .heading-anchor,
.heading-anchor:focus {
  opacity: 1;
}

/* ---------- TOC ---------- */

.toc {
  position: sticky;
  top: 5.5rem;
}

.toc__label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 0.85rem;
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.toc li {
  margin: 0;
}

.toc li.toc__level-3 {
  padding-left: 1rem;
}

.toc a {
  display: block;
  padding-left: 0.9rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--color-ink-faint);
  font-size: 0.87rem;
  line-height: 1.4;
}

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

.toc a.is-active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

/* ---------- Related & prev/next ---------- */

.related {
  padding-block: 3rem;
  border-top: 1px solid var(--color-border);
}

.prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 700px) {
  .prev-next {
    grid-template-columns: 1fr;
  }
}

.prev-next__card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.3rem;
  display: block;
}

.prev-next__card:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

.prev-next__card span {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 0.4rem;
}

.prev-next__card strong {
  color: var(--color-ink);
  font-weight: 600;
  font-size: 0.98rem;
}

.prev-next__next {
  text-align: right;
}

/* ---------- Pagination ---------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding-top: 2.5rem;
  list-style: none;
  margin: 0;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding-inline: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  font-weight: 600;
}

.pagination a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

.pagination .is-current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-contrast);
}

.pagination .is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 3rem;
  margin-top: 3rem;
  background: var(--color-canvas-subtle);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 760px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

.site-footer h4 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin: 0 0 1rem;
}

.site-footer p {
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  max-width: 40ch;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.site-footer a {
  color: var(--color-ink-soft);
  font-size: 0.92rem;
}

.site-footer a:hover {
  color: var(--color-primary);
}

.site-footer__bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.83rem;
  color: var(--color-ink-faint);
}

/* ---------- 404 ---------- */

.error-page {
  padding-block: 6rem;
  text-align: center;
}

.error-page h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  margin: 0;
  color: var(--color-primary);
}

.error-page p {
  color: var(--color-ink-soft);
  font-size: 1.1rem;
  margin: 0.75rem 0 2rem;
}

/* ---------- Responsive nav ---------- */

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    inset: 0;
    top: 62px;
    background: var(--color-canvas);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform 0.2s ease;
    overflow-y: auto;
  }

  .main-nav.is-open {
    transform: translateX(0);
  }

  .main-nav__links {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.1rem;
    width: 100%;
  }

  .main-nav__links details {
    width: 100%;
  }

  .category-menu {
    position: static;
    transform: none;
    grid-template-columns: 1fr;
    box-shadow: none;
    border: none;
    margin-top: 0.5rem;
    padding-left: 0.5rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .post-card--featured {
    grid-column: span 1;
  }
}