/* ===========================================================================
   Headless CMS Integration Patterns — stylesheet
   Light, elegant, professional. Wide on desktop, responsive on mobile.
   =========================================================================== */

:root {
  /* Color scheme — light & easy on the eyes */
  --color-bg: #f7f9fc;
  --color-bg-tint: #eef2fb;
  --color-surface: #ffffff;
  --color-surface-2: #f4f7fc;
  --color-border: #e2e8f2;
  --color-border-strong: #cdd7e8;
  --color-text: #1e293b;
  --color-text-soft: #475569;
  --color-muted: #6b7894;

  --color-primary: #4f46e5;
  --color-primary-600: #4338ca;
  --color-primary-700: #3730a3;
  --color-primary-soft: #eef2ff;
  --color-accent: #0ea5e9;
  --color-accent-soft: #e0f2fe;

  /* per-context accent, overridden inline by sections */
  --accent: var(--color-primary);

  --code-bg: #f6f8fd;
  --code-border: #e4e9f5;
  --inline-code-bg: #eef1f9;

  --grad-brand: linear-gradient(115deg, #6366f1 0%, #8b5cf6 45%, #0ea5e9 100%);

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Fira Code",
    Menlo, Consolas, "Liberation Mono", monospace;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 48px rgba(30, 41, 59, 0.14);

  --header-h: 66px;
  --wrap: 1240px;
  --wrap-wide: 1400px;
  --transition: 180ms ease;
}

/* ---- Reset / base ------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px); /* in-page anchor offset */
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(16px, 0.97rem + 0.15vw, 18px);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img,
svg {
  max-width: 100%;
}
.icon {
  width: 1.25em;
  height: 1.25em;
  fill: none;
  flex: none;
}
.site-main {
  flex: 1 0 auto;
}
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1rem, 0.4rem + 2.5vw, 2.5rem);
}
@media (min-width: 1600px) {
  .wrap {
    max-width: var(--wrap-wide);
  }
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-primary-700);
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 200;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0.75rem;
  color: #fff;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-primary) 55%, white);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- Header ------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
  font-weight: 700;
  flex: none;
}
.brand:hover {
  color: var(--color-text);
}
.brand-mark {
  width: 38px;
  height: 38px;
  transition: transform var(--transition);
}
.brand:hover .brand-mark {
  transform: rotate(-6deg) scale(1.05);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-title {
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}
.brand-sub {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.site-nav {
  margin-left: auto;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.7rem;
  border-radius: 999px;
  color: var(--color-text-soft);
  font-weight: 600;
  font-size: 0.92rem;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.nav-link .icon {
  color: var(--accent, var(--color-primary));
  width: 1.15em;
  height: 1.15em;
}
.nav-link:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}
.nav-link[aria-current="page"] {
  color: var(--color-primary-700);
  background: var(--color-primary-soft);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent, var(--color-primary));
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem;
  color: var(--color-text);
  cursor: pointer;
}
.nav-toggle .icon {
  width: 1.4em;
  height: 1.4em;
}
.nav-toggle .nav-icon-close {
  display: none;
}
.nav-toggle[aria-expanded="true"] .nav-icon-open {
  display: none;
}
.nav-toggle[aria-expanded="true"] .nav-icon-close {
  display: block;
}

/* Condense nav on mid-widths: icons only (labels would overflow) */
@media (max-width: 980px) {
  .nav-link span:not(.icon) {
    display: none;
  }
  .nav-link {
    padding: 0.5rem;
  }
  .nav-link[aria-current="page"]::after {
    left: 0.4rem;
    right: 0.4rem;
  }
}
@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 0.75rem clamp(1rem, 5vw, 2rem) 1.25rem;
    display: none;
  }
  .site-nav.is-open {
    display: block;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }
  .nav-link {
    border-radius: var(--radius-sm);
    padding: 0.7rem 0.8rem;
    font-size: 1rem;
  }
  .nav-link span:not(.icon) {
    display: inline;
  }
  .nav-link .icon {
    width: 1.3em;
    height: 1.3em;
  }
  .nav-link[aria-current="page"]::after {
    display: none;
  }
}

/* ---- Hero --------------------------------------------------------------- */
.hero {
  background:
    radial-gradient(60% 120% at 15% 0%, rgba(99, 102, 241, 0.12), transparent 60%),
    radial-gradient(50% 120% at 90% 10%, rgba(14, 165, 233, 0.12), transparent 60%),
    linear-gradient(180deg, var(--color-bg-tint), var(--color-bg));
  border-bottom: 1px solid var(--color-border);
}
.hero-inner {
  padding-block: clamp(2.75rem, 6vw, 5rem);
  text-align: center;
}
.hero-logo {
  display: block;
  width: clamp(92px, 14vw, 132px);
  height: auto;
  margin: 0 auto 1.4rem;
  filter: drop-shadow(0 14px 30px rgba(79, 70, 229, 0.28));
  transition: transform 300ms ease;
}
.hero-logo:hover {
  transform: translateY(-4px) rotate(-3deg);
}
.hero-title {
  font-size: clamp(2.1rem, 1.4rem + 3.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 0.7rem;
  font-weight: 800;
}
.grad {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-tagline {
  max-width: 62ch;
  margin: 0 auto;
  color: var(--color-text-soft);
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.3rem);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
  font-weight: 650;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}
.cta-btn:hover {
  color: var(--color-text);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--color-border));
}
.cta-icon {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(
    135deg,
    var(--accent),
    color-mix(in srgb, var(--accent) 60%, #ffffff)
  );
  box-shadow: 0 4px 10px color-mix(in srgb, var(--accent) 35%, transparent);
}
.cta-icon .icon {
  width: 1.15em;
  height: 1.15em;
}

/* ---- Home sections ------------------------------------------------------ */
.section-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin: 0 0 0.6rem;
}
.home-intro {
  padding-block: clamp(2.5rem, 5vw, 3.5rem) 0.5rem;
}
.home-intro p {
  color: var(--color-text-soft);
  font-size: 1.07rem;
}
.home-sections {
  padding-block: clamp(2rem, 4vw, 3.25rem) clamp(3rem, 6vw, 4.5rem);
}
.section-grid {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
}
.section-card {
  display: flex;
  gap: 1rem;
  height: 100%;
  padding: 1.4rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}
.section-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--accent);
  opacity: 0.85;
}
.section-card:hover {
  color: var(--color-text);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--color-border));
}
.section-icon {
  display: inline-grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  flex: none;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(
    135deg,
    var(--accent),
    color-mix(in srgb, var(--accent) 55%, #ffffff)
  );
  box-shadow: 0 6px 14px color-mix(in srgb, var(--accent) 35%, transparent);
}
.section-icon .icon {
  width: 1.5em;
  height: 1.5em;
}
.section-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.section-title {
  font-weight: 750;
  font-size: 1.12rem;
}
.section-blurb {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}
.section-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 650;
  font-size: 0.9rem;
  color: var(--accent);
}
.section-more .icon {
  transition: transform var(--transition);
}
.section-card:hover .section-more .icon {
  transform: translateX(4px);
}

/* ---- Page shell (content) ---------------------------------------------- */
.page-shell {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1rem, 0.4rem + 2.5vw, 2.5rem);
  padding-block: 1.5rem clamp(2.5rem, 5vw, 4rem);
}
@media (min-width: 1600px) {
  .page-shell {
    max-width: var(--wrap-wide);
  }
}

/* ---- Breadcrumbs -------------------------------------------------------- */
.breadcrumbs {
  margin: 0.5rem 0 1.5rem;
  font-size: 0.88rem;
}
.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.4rem;
  margin: 0;
  padding: 0;
}
.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-muted);
}
.breadcrumbs a {
  color: var(--color-text-soft);
  font-weight: 600;
}
.breadcrumbs a:hover {
  color: var(--accent);
}
.breadcrumbs [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}
.crumb-sep {
  width: 0.95em;
  height: 0.95em;
  color: var(--color-border-strong);
}

/* ---- Content typography ------------------------------------------------- */
.content {
  /* wide, not a narrow column: fill the container on desktop */
  max-width: 100%;
}
.content > * {
  max-width: 100%;
}

.content h1 {
  font-size: clamp(1.9rem, 1.4rem + 2.2vw, 2.85rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 1rem;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.content h2 {
  font-size: clamp(1.4rem, 1.15rem + 1vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 750;
  margin: 2.4rem 0 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-h) + 18px);
}
.content h3 {
  font-size: clamp(1.18rem, 1.05rem + 0.5vw, 1.4rem);
  font-weight: 700;
  margin: 1.9rem 0 0.6rem;
  color: var(--color-primary-700);
  scroll-margin-top: calc(var(--header-h) + 18px);
}
.content h4 {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
  color: var(--color-text);
  scroll-margin-top: calc(var(--header-h) + 18px);
}
.content p,
.content li {
  color: var(--color-text);
}
.content p {
  margin: 0 0 1.1rem;
}
.content ul,
.content ol {
  margin: 0 0 1.2rem;
  padding-left: 1.4rem;
}
.content li {
  margin: 0.35rem 0;
}
.content li::marker {
  color: var(--accent);
}
.content strong {
  font-weight: 700;
  color: var(--color-text);
}
.content blockquote {
  margin: 1.4rem 0;
  padding: 0.4rem 1.2rem;
  border-left: 4px solid var(--accent);
  background: var(--color-surface-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-soft);
}
.content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.4rem 0;
}

/* Heading anchor links (markdown-it-anchor headerLink) */
.content :is(h2, h3, h4) > a {
  color: inherit;
  text-decoration: none;
}
.content :is(h2, h3, h4) > a:hover {
  color: var(--accent);
}

/* Body links */
.content a:not(.related-card) {
  color: var(--color-primary-600);
  font-weight: 550;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-primary) 35%, transparent);
  text-underline-offset: 0.18em;
  transition: color var(--transition), text-decoration-color var(--transition);
}
.content a:not(.related-card):hover {
  color: var(--color-primary-700);
  text-decoration-color: var(--color-primary);
}

/* ---- Inline code -------------------------------------------------------- */
.content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--inline-code-bg);
  color: #3b4a66;
  padding: 0.12em 0.4em;
  border-radius: 5px;
  border: 0; /* no border, blends with text */
  white-space: break-spaces;
}
.content a code {
  color: inherit;
}

/* ---- Code blocks -------------------------------------------------------- */
.code-block {
  margin: 1.4rem 0;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem 0.4rem 0.9rem;
  background: color-mix(in srgb, var(--code-bg) 55%, #e9eefb);
  border-bottom: 1px solid var(--code-border);
}
.code-lang {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 650;
  font-family: var(--font-sans);
  color: var(--color-text-soft);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 7px;
  cursor: pointer;
  transition: all var(--transition);
}
.copy-btn:hover {
  color: var(--color-primary-700);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}
.copy-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  background: currentColor;
  -webkit-mask: center / contain no-repeat;
  mask: center / contain no-repeat;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='9' y='9' width='11' height='11' rx='2'/%3E%3Cpath d='M5 15V5a2 2 0 0 1 2-2h10'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='9' y='9' width='11' height='11' rx='2'/%3E%3Cpath d='M5 15V5a2 2 0 0 1 2-2h10'/%3E%3C/svg%3E");
}
.copy-btn.is-copied {
  color: #047857;
  border-color: #6ee7b7;
  background: #ecfdf5;
}
.copy-btn.is-copied .copy-icon {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m4 12 5 5L20 6'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m4 12 5 5L20 6'/%3E%3C/svg%3E");
}
.code-pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #324158;
  tab-size: 2;
}
.code-pre code {
  font-family: inherit;
  background: none;
  padding: 0;
  white-space: pre;
}

/* Prism light token theme — tuned to the site palette */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: #8b96a8;
  font-style: italic;
}
.token.punctuation {
  color: #64748b;
}
.token.namespace {
  opacity: 0.7;
}
.token.keyword,
.token.control,
.token.atrule,
.token.rule {
  color: #7c3aed;
}
.token.boolean,
.token.number,
.token.constant,
.token.symbol {
  color: #b45309;
}
.token.string,
.token.char,
.token.attr-value,
.token.regex {
  color: #047857;
}
.token.function,
.token.class-name,
.token.maybe-class-name {
  color: #2563eb;
}
.token.tag,
.token.selector,
.token.deleted {
  color: #be123c;
}
.token.attr-name,
.token.property,
.token.variable {
  color: #c2410c;
}
.token.operator,
.token.entity,
.token.url {
  color: #0e7490;
}
.token.inserted {
  color: #047857;
}
.token.important,
.token.bold {
  font-weight: 700;
}
.token.italic {
  font-style: italic;
}

/* ---- Task-list checkboxes ---------------------------------------------- */
.content ul:has(> li.task-list-item) {
  list-style: none;
  padding-left: 0.2rem;
}
.content li.task-list-item {
  list-style: none; /* removes the bullet/dot in front of the checkbox */
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.15rem 0;
}
.content li.task-list-item::marker {
  content: "";
}
.content li.task-list-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  margin: 0.28em 0 0;
  width: 1.15em;
  height: 1.15em;
  flex: none;
  border: 2px solid var(--color-border-strong);
  border-radius: 5px;
  background: var(--color-surface);
  cursor: pointer;
  display: grid;
  place-content: center;
  transition: background var(--transition), border-color var(--transition);
}
.content li.task-list-item input[type="checkbox"]::before {
  content: "";
  width: 0.62em;
  height: 0.62em;
  transform: scale(0);
  transition: transform 120ms ease;
  background: #fff;
  clip-path: polygon(14% 44%, 0 60%, 40% 100%, 100% 22%, 84% 6%, 38% 70%);
}
.content li.task-list-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}
.content li.task-list-item input[type="checkbox"]:checked::before {
  transform: scale(1);
}
.content li.task-list-item.is-checked {
  color: var(--color-muted);
}
.content li.task-list-item.is-checked label,
.content li.task-list-item.is-checked > * {
  text-decoration: line-through;
  text-decoration-color: var(--color-border-strong);
}

/* ---- Tables ------------------------------------------------------------- */
.table-scroll {
  margin: 1.4rem 0;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}
.content table {
  border-collapse: collapse;
  width: 100%;
  min-width: 32rem;
  font-size: 0.92rem;
  background: var(--color-surface);
}
.content thead th {
  background: var(--color-surface-2);
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.content th,
.content td {
  padding: 0.7rem 0.95rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.content tbody tr:last-child td {
  border-bottom: 0;
}
.content tbody tr:hover {
  background: color-mix(in srgb, var(--color-primary-soft) 50%, transparent);
}

/* ---- FAQ accordion ------------------------------------------------------ */
.faq-accordion {
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 1.6rem;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.faq-item > summary {
  list-style: none;
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-weight: 650;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background var(--transition);
}
.faq-item > summary::-webkit-details-marker {
  display: none;
}
.faq-item > summary::after {
  content: "";
  width: 0.65em;
  height: 0.65em;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  transform: rotate(45deg);
  transition: transform var(--transition);
  flex: none;
}
.faq-item[open] > summary::after {
  transform: rotate(-135deg);
}
.faq-item > summary:hover {
  background: var(--color-surface-2);
}
.faq-item > :not(summary) {
  padding: 0 1.1rem;
}
.faq-item > :not(summary):last-child {
  padding-bottom: 1rem;
}

/* ---- Mermaid ------------------------------------------------------------ */
pre.mermaid {
  margin: 1.4rem 0;
  padding: 1.2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
pre.mermaid:not([data-processed]) {
  color: transparent; /* hide raw text until rendered */
  min-height: 3rem;
}

/* Zoomable diagrams + full-screen lightbox */
pre.mermaid.is-zoomable {
  position: relative;
  cursor: zoom-in;
}
pre.mermaid.is-zoomable:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.diagram-zoom-hint {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
pre.mermaid.is-zoomable:hover .diagram-zoom-hint,
pre.mermaid.is-zoomable:focus-visible .diagram-zoom-hint {
  opacity: 1;
}
.diagram-zoom-hint svg {
  width: 1.05rem;
  height: 1.05rem;
}

.diagram-lightbox[hidden] {
  display: none;
}
.diagram-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 4vw, 3rem);
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(4px);
  animation: lightbox-in 160ms ease;
}
@keyframes lightbox-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.diagram-lightbox-stage {
  width: min(95vw, 1500px);
  height: min(90vh, 1000px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-lg);
}
.diagram-lightbox-stage svg {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
}
.diagram-lightbox-close {
  position: absolute;
  top: clamp(0.75rem, 2vw, 1.5rem);
  right: clamp(0.75rem, 2vw, 1.5rem);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.diagram-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.24);
}
.diagram-lightbox-close svg {
  width: 1.3rem;
  height: 1.3rem;
}
body.lightbox-open {
  overflow: hidden;
}
@media (prefers-reduced-motion: reduce) {
  .diagram-lightbox { animation: none; }
}

/* ---- KaTeX -------------------------------------------------------------- */
.content .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.4rem 0;
}

/* ---- Related content ---------------------------------------------------- */
.related {
  margin-top: 3rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--color-border);
}
.related-heading {
  font-size: 1.2rem;
  font-weight: 750;
  margin: 0 0 1rem;
}
.related-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  height: 100%;
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}
.related-card:hover {
  color: var(--color-text);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--color-border));
}
.related-title {
  font-weight: 700;
  font-size: 1rem;
}
.related-desc {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-go {
  margin-top: 0.4rem;
  color: var(--accent);
}
.related-go .icon {
  transition: transform var(--transition);
}
.related-card:hover .related-go .icon {
  transform: translateX(4px);
}

/* ---- 404 / offline ------------------------------------------------------ */
.notfound {
  text-align: center;
  padding-block: clamp(3rem, 8vw, 6rem);
}
.notfound-code {
  font-size: clamp(3rem, 2rem + 6vw, 6rem);
  font-weight: 800;
  margin: 0;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.notfound h1 {
  margin: 0.2rem 0 0.6rem;
}
.notfound p {
  color: var(--color-text-soft);
  max-width: 52ch;
  margin-inline: auto;
}
.notfound-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-top: 1.6rem;
}

/* ---- Footer ------------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  background: #0f172a;
  color: #cbd5e1;
}
.footer-inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.6fr 1fr;
  padding-block: clamp(2.2rem, 4vw, 3rem);
}
.footer-brand {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
}
.footer-brand .brand-mark {
  width: 44px;
  height: 44px;
  flex: none;
}
.footer-title {
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.3rem;
}
.footer-desc {
  margin: 0;
  font-size: 0.92rem;
  color: #94a3b8;
  max-width: 48ch;
}
.footer-heading {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #94a3b8;
  margin: 0 0 0.7rem;
}
.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}
.footer-nav a {
  color: #cbd5e1;
  font-weight: 550;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.footer-nav a::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent, var(--color-accent));
  flex: none;
}
.footer-nav a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  padding-block: 1.1rem;
}
.footer-bottom p {
  margin: 0;
  font-size: 0.84rem;
  color: #8294ad;
}
@media (max-width: 680px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ---- Reduced motion ----------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}