/* ============================================================
   Insurance Claims & Policy Data Automation — site stylesheet
   Color scheme: light, professional, elegant
   ============================================================ */

:root {
  /* Neutrals */
  --bg: #fbfaf6;
  --bg-alt: #f4f1ea;
  --surface: #ffffff;
  --surface-2: #f8f6ef;
  --border: #e6e0cf;
  --border-strong: #cfc7b5;

  /* Text */
  --text: #1f2147;
  --text-muted: #5b5a78;
  --text-soft: #7d7c95;

  /* Brand */
  --indigo: #3b3d99;
  --indigo-deep: #2a2c75;
  --violet: #7c5cd6;
  --teal: #14a3a6;
  --teal-deep: #0f8081;
  --amber: #e0a82e;
  --amber-deep: #b68720;
  --rose: #d36a8a;

  /* Code */
  --code-bg: #f6f3ea;
  --code-bg-inline: #efece2;
  --code-fg: #2a2c75;

  /* Layout */
  --header-h: 64px;
  --content-w: 1320px;
  --reading-w: 1080px;
  --radius: 14px;
  --radius-sm: 8px;

  --shadow-sm: 0 1px 2px rgba(31, 33, 71, 0.05), 0 1px 3px rgba(31, 33, 71, 0.05);
  --shadow-md: 0 4px 16px rgba(31, 33, 71, 0.06), 0 2px 6px rgba(31, 33, 71, 0.04);
  --shadow-lg: 0 14px 38px rgba(31, 33, 71, 0.10), 0 8px 18px rgba(31, 33, 71, 0.05);

  --ease: cubic-bezier(.22, .65, .27, .98);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124, 92, 214, 0.07), transparent 60%),
    radial-gradient(1000px 500px at -10% 10%, rgba(20, 163, 166, 0.06), transparent 60%),
    var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; }

::selection { background: rgba(124, 92, 214, 0.25); }

.skip-link {
  position: absolute;
  left: -1000px;
  top: 0;
  background: var(--indigo);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 246, 0.88);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}

.site-header__inner {
  max-width: var(--content-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
  padding: 6px 8px;
  margin-left: -8px;
  border-radius: var(--radius-sm);
  transition: background 200ms var(--ease);
}
.brand:hover { background: rgba(124, 92, 214, 0.08); }
.brand:focus-visible { outline: 2px solid var(--violet); outline-offset: 2px; }
.brand__logo { display: block; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__title { font-weight: 700; color: var(--indigo); font-size: 16px; letter-spacing: -0.01em; }
.brand__sub   { font-size: 12px; color: var(--text-muted); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--indigo);
  cursor: pointer;
}
.nav-toggle__close { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__close { display: block; }

.primary-nav { margin-left: auto; }
.primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 14.5px;
  transition: color 180ms var(--ease), background 180ms var(--ease), transform 180ms var(--ease);
  position: relative;
}
.nav-link__icon { color: var(--text-soft); transition: color 180ms var(--ease); }
.nav-link:hover { color: var(--indigo); background: rgba(59, 61, 153, 0.06); }
.nav-link:hover .nav-link__icon { color: var(--indigo); }

.nav-link.is-current {
  color: var(--indigo);
  background: linear-gradient(180deg, rgba(124, 92, 214, 0.12), rgba(20, 163, 166, 0.08));
  box-shadow: inset 0 0 0 1px rgba(59, 61, 153, 0.18);
}
.nav-link--violet.is-current .nav-link__icon { color: var(--violet); }
.nav-link--teal.is-current   .nav-link__icon { color: var(--teal); }
.nav-link--amber.is-current  .nav-link__icon { color: var(--amber-deep); }

.nav-link--violet:hover .nav-link__icon { color: var(--violet); }
.nav-link--teal:hover .nav-link__icon { color: var(--teal); }
.nav-link--amber:hover .nav-link__icon { color: var(--amber-deep); }

/* ---------- Main / layout ---------- */

.main {
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

/* Front page hero */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  padding: 32px 0 56px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}
.hero__copy {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(124, 92, 214, 0.12), rgba(20, 163, 166, 0.12));
  color: var(--indigo);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero__title {
  font-size: clamp(2.2rem, 1.4rem + 2.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.022em;
  margin: 16px 0 8px;
  font-weight: 800;
  color: var(--indigo-deep);
  max-width: 22ch;
  background: linear-gradient(115deg, #2a2c75 10%, #7c5cd6 45%, #14a3a6 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__lede {
  font-size: 18.5px;
  color: var(--text-muted);
  margin: 14px 0 0;
  max-width: 60ch;
}

.hero__paragraphs {
  margin: 22px auto 28px;
  max-width: 70ch;
  text-align: left;
}
.hero__paragraphs p { margin: 0 0 14px; color: var(--text); }

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 8px;
  justify-content: center;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease), border-color 200ms var(--ease);
}
.cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.cta:focus-visible { outline: 2px solid var(--violet); outline-offset: 3px; }

.cta__icon {
  width: 38px; height: 38px;
  display: inline-grid; place-items: center;
  border-radius: 10px;
  background: rgba(124, 92, 214, 0.12);
  color: var(--violet);
}
.cta--teal .cta__icon  { background: rgba(20, 163, 166, 0.14); color: var(--teal); }
.cta--amber .cta__icon { background: rgba(224, 168, 46, 0.18); color: var(--amber-deep); }
.cta--violet .cta__icon{ background: rgba(124, 92, 214, 0.14); color: var(--violet); }

.cta__title { display: block; line-height: 1.2; }
.cta__subtitle { display: block; font-weight: 500; font-size: 12.5px; color: var(--text-muted); }

.cta--primary {
  background: linear-gradient(135deg, var(--indigo), var(--violet));
  color: #fff;
  border-color: transparent;
}
.cta--primary .cta__icon { background: rgba(255, 255, 255, 0.18); color: #fff; }
.cta--primary .cta__subtitle { color: rgba(255, 255, 255, 0.85); }
.cta--primary:hover { box-shadow: 0 10px 28px rgba(124, 92, 214, 0.35); }

.hero__art {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  padding: 8px 0 4px;
}
.hero__logo {
  width: clamp(160px, 22vw, 220px);
  height: auto;
  filter: drop-shadow(0 24px 40px rgba(59, 61, 153, 0.18));
  transition: transform 600ms var(--ease);
}
.hero__art:hover .hero__logo { transform: rotate(-2deg) scale(1.03); }
.hero__art::before {
  content: "";
  position: absolute;
  width: clamp(260px, 30vw, 360px);
  height: clamp(260px, 30vw, 360px);
  border-radius: 50%;
  background:
    radial-gradient(50% 50% at 50% 50%, rgba(124, 92, 214, 0.18), transparent 70%),
    radial-gradient(60% 60% at 70% 30%, rgba(20, 163, 166, 0.16), transparent 70%);
  z-index: -1;
}

/* Section cards on the front page */

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
}

.section-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: transform 250ms var(--ease), box-shadow 250ms var(--ease), border-color 250ms var(--ease);
  overflow: hidden;
}
.section-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(124, 92, 214, 0.05));
  opacity: 0;
  transition: opacity 250ms var(--ease);
  pointer-events: none;
}
.section-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.section-card:hover::after { opacity: 1; }

.section-card__icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: grid; place-items: center;
  margin-bottom: 18px;
  background: rgba(124, 92, 214, 0.12); color: var(--violet);
}
.section-card--teal  .section-card__icon { background: rgba(20, 163, 166, 0.14); color: var(--teal); }
.section-card--amber .section-card__icon { background: rgba(224, 168, 46, 0.18); color: var(--amber-deep); }

.section-card__title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--indigo-deep);
  letter-spacing: -0.01em;
}
.section-card__desc {
  color: var(--text-muted);
  margin: 0 0 18px;
  font-size: 15px;
}
.section-card__more {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; color: var(--indigo); font-size: 14px;
}
.section-card:hover .section-card__more svg { transform: translateX(3px); }
.section-card__more svg { transition: transform 200ms var(--ease); }

.section-card__topics {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 14px;
}
.section-card__topic {
  font-size: 12.5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* Front-page secondary blocks */

.about-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 56px;
  box-shadow: var(--shadow-sm);
}
.about-block h2 {
  margin-top: 0;
  font-size: 26px;
  color: var(--indigo-deep);
}
.about-block p { color: var(--text); max-width: 78ch; }
.about-block a { color: var(--violet); text-decoration: none; border-bottom: 1px dashed rgba(124, 92, 214, 0.5); }
.about-block a:hover { color: var(--indigo-deep); border-bottom-color: var(--indigo); }

/* ---------- Content pages ---------- */

.breadcrumbs {
  font-size: 13.5px;
  color: var(--text-muted);
  margin: 0 0 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.breadcrumbs a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.breadcrumbs a:hover { color: var(--indigo); border-bottom-color: rgba(59, 61, 153, 0.4); }
.breadcrumbs .sep { color: var(--text-soft); }
.breadcrumbs .current { color: var(--indigo); font-weight: 600; }

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.content {
  min-width: 0;
  max-width: var(--reading-w);
}

.content h1 {
  font-size: clamp(1.85rem, 1.4rem + 1.6vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.018em;
  margin: 8px 0 18px;
  font-weight: 800;
  background: linear-gradient(115deg, #2a2c75 0%, #7c5cd6 40%, #14a3a6 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.content h2 {
  font-size: 1.55rem;
  line-height: 1.25;
  letter-spacing: -0.012em;
  margin: 44px 0 14px;
  color: var(--indigo-deep);
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.content h3 {
  font-size: 1.2rem;
  margin: 32px 0 10px;
  color: var(--indigo);
  font-weight: 700;
}
.content h4 { font-size: 1.05rem; margin: 24px 0 8px; color: var(--indigo); font-weight: 700; }

.content h1, .content h2, .content h3, .content h4 {
  scroll-margin-top: calc(var(--header-h) + 8px);
}

.heading-wrapper {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.header-anchor {
  opacity: 0;
  font-size: 0.85em;
  color: var(--text-soft);
  text-decoration: none;
  transition: opacity 200ms var(--ease), color 200ms var(--ease);
}
.heading-wrapper:hover .header-anchor { opacity: 1; }
.header-anchor:hover { color: var(--violet); }

.content p {
  margin: 0 0 16px;
  color: var(--text);
}
.content > p:first-of-type {
  font-size: 1.06rem;
  color: #2c2f55;
}

.content a {
  color: var(--violet);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 92, 214, 0.3);
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
  padding: 0 2px;
  border-radius: 2px;
}
.content a:hover {
  color: var(--indigo-deep);
  border-bottom-color: var(--indigo);
  background: rgba(124, 92, 214, 0.06);
}
.content a.ext-link::after {
  content: "↗";
  font-size: 0.85em;
  margin-left: 2px;
  color: var(--text-soft);
}

.content ul, .content ol { padding-left: 22px; margin: 0 0 18px; }
.content li { margin: 6px 0; }

.content blockquote {
  margin: 18px 0;
  padding: 14px 20px;
  border-left: 4px solid var(--violet);
  background: var(--surface-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}

/* Inline code */

:not(pre) > code {
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg-inline);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 0.92em;
  color: #4a3f8a;
  border: none;
  white-space: break-spaces;
}

/* Code blocks */

.codeblock {
  position: relative;
  margin: 18px 0 24px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.codeblock::before {
  content: attr(data-lang);
  position: absolute;
  top: 10px;
  left: 14px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-weight: 600;
  pointer-events: none;
}
.codeblock pre {
  margin: 0;
  padding: 36px 18px 18px;
  overflow-x: auto;
  background: transparent;
  font-size: 14px;
  line-height: 1.6;
}
.codeblock code {
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--code-fg);
  background: transparent;
  padding: 0;
  border: 0;
  display: block;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 180ms var(--ease);
  font-family: inherit;
}
.copy-btn:hover { color: var(--indigo); border-color: var(--border-strong); background: #fff; }
.copy-btn.copied { color: var(--teal); border-color: var(--teal); background: rgba(20, 163, 166, 0.08); }

/* Prism light theme tuned to brand */
.codeblock .token.comment,
.codeblock .token.prolog,
.codeblock .token.doctype,
.codeblock .token.cdata { color: #8a8aa3; font-style: italic; }
.codeblock .token.punctuation { color: #5b5a78; }
.codeblock .token.property,
.codeblock .token.tag,
.codeblock .token.constant,
.codeblock .token.symbol,
.codeblock .token.deleted { color: #b65b4d; }
.codeblock .token.boolean,
.codeblock .token.number { color: var(--amber-deep); }
.codeblock .token.selector,
.codeblock .token.attr-name,
.codeblock .token.string,
.codeblock .token.char,
.codeblock .token.builtin,
.codeblock .token.inserted { color: var(--teal-deep); }
.codeblock .token.operator,
.codeblock .token.entity,
.codeblock .token.url,
.codeblock .language-css .token.string,
.codeblock .style .token.string { color: #5b5a78; }
.codeblock .token.atrule,
.codeblock .token.attr-value,
.codeblock .token.keyword { color: var(--violet); font-weight: 600; }
.codeblock .token.function,
.codeblock .token.class-name { color: var(--indigo); font-weight: 600; }
.codeblock .token.regex,
.codeblock .token.important,
.codeblock .token.variable { color: var(--amber-deep); }
.codeblock .token.important,
.codeblock .token.bold { font-weight: 700; }
.codeblock .token.italic { font-style: italic; }
.codeblock .token.decorator { color: var(--rose); }

/* Tables */

.table-wrap {
  overflow-x: auto;
  margin: 18px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 480px;
}
.content thead th {
  background: var(--surface-2);
  color: var(--indigo-deep);
  text-align: left;
  font-weight: 700;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-strong);
}
.content tbody td {
  padding: 11px 14px;
  border-top: 1px solid var(--border);
  color: var(--text);
}
.content tbody tr:hover td { background: rgba(124, 92, 214, 0.04); }

/* Task list / checkbox styling — render `[ ]` items as togglable checkboxes
   with a line-through when checked. Strip the default list bullet. */

.content ul.contains-task-list {
  list-style: none;
  padding-left: 4px;
}
.content ul.contains-task-list ul.contains-task-list {
  padding-left: 22px;
}
.content li.task-list-item {
  position: relative;
  padding-left: 6px;
  margin: 8px 0;
  list-style: none;
}
.content li.task-list-item::marker { content: ""; }
.content li.task-list-item > label,
.content li.task-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}
.content li.task-list-item input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 4px 0 0 0;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background: var(--surface);
  border: 2px solid var(--border-strong);
  border-radius: 5px;
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
  position: relative;
}
.content li.task-list-item input[type="checkbox"]:hover { border-color: var(--violet); }
.content li.task-list-item input[type="checkbox"]:checked {
  background: linear-gradient(135deg, var(--violet), var(--teal));
  border-color: transparent;
}
.content li.task-list-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: -1px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.content li.task-list-item.checked,
.content li.task-list-item.checked > label {
  color: var(--text-soft);
  text-decoration: line-through;
  text-decoration-color: rgba(124, 92, 214, 0.5);
}

/* FAQ accordions */

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 18px 0;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  color: var(--indigo-deep);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--violet);
  transition: transform 200ms var(--ease);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item summary:hover { background: var(--surface-2); }
.faq-body { padding: 0 20px 18px; color: var(--text); }
.faq-body > :first-child { margin-top: 0; }
.faq-body > :last-child  { margin-bottom: 0; }

/* Mermaid blocks */

pre.mermaid {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin: 18px 0;
  text-align: center;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

/* KaTeX tweaks */

.katex-display { margin: 1em 0; overflow-x: auto; overflow-y: hidden; }
.katex { font-size: 1.05em; color: var(--indigo-deep); }

/* Sidebar / related */

.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
}
.sidebar__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
}
.sidebar__heading {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  font-weight: 700;
}
.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}
.sidebar a:hover { color: var(--indigo); background: rgba(124, 92, 214, 0.06); border-left-color: var(--violet); }

.related {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.related h2 { margin-top: 0; font-size: 1.3rem; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-decoration: none;
  color: var(--text);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
  font-size: 14.5px;
  font-weight: 500;
}
.related-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: var(--indigo); }

/* Footer */

.site-footer {
  margin-top: auto;
  background: linear-gradient(180deg, transparent, var(--bg-alt));
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
}
.site-footer__inner {
  max-width: var(--content-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 32px;
  align-items: start;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand__title { font-weight: 700; color: var(--indigo-deep); }
.footer-brand__sub   { font-size: 14px; color: var(--text-muted); }

.footer-heading { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-soft); font-weight: 700; margin: 0 0 12px; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.footer-nav a { color: var(--text-muted); text-decoration: none; font-size: 14.5px; transition: color 180ms var(--ease); }
.footer-nav a:hover { color: var(--indigo); }
.footer-meta p { margin: 0 0 6px; color: var(--text-muted); font-size: 14px; }
.footer-meta__small { color: var(--text-soft); font-size: 12.5px; }

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

@media (max-width: 1100px) {
  .content-layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; }
  .sidebar__card { background: transparent; box-shadow: none; padding: 0; border: 0; }
  .sidebar__card + .sidebar__card { margin-top: 12px; }
}

@media (max-width: 900px) {
  .hero { gap: 4px; padding: 20px 0 36px; }
  .hero__logo { width: clamp(140px, 38vw, 190px); }
  .site-footer__inner { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  :root { --header-h: 60px; }
  .site-header__inner { padding: 0 16px; gap: 8px; }
  .brand__sub { display: none; }
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(251, 250, 246, 0.97);
    backdrop-filter: blur(8px);
    padding: 16px;
    overflow: auto;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 220ms var(--ease), transform 220ms var(--ease), visibility 0s linear 220ms;
    z-index: 40;
  }
  .primary-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    transition: opacity 220ms var(--ease), transform 220ms var(--ease), visibility 0s;
  }
  .primary-nav ul {
    flex-direction: column;
    gap: 6px;
    align-items: stretch;
  }
  .nav-link {
    border-radius: 12px;
    padding: 14px 14px;
    font-size: 16px;
    border: 1px solid var(--border);
    background: var(--surface);
  }
  .main { padding: 24px 16px 48px; }
  .hero__title { font-size: 2rem; }
  .content h1 { font-size: 1.7rem; }
  .content h2 { font-size: 1.3rem; margin-top: 32px; }
  body { font-size: 16px; }
}

@media (min-width: 1600px) {
  :root { --content-w: 1480px; --reading-w: 1200px; }
}

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