/* ==========================================================================
   DataWithShoaib — design system
   Palette: white, black, blue. Bootstrap 5 supplies the grid and utilities;
   everything visual lives here.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-heading: "Plus Jakarta Sans", var(--font-sans);
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --sidebar-w: 264px;
  --topbar-h: 64px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

html[data-mode='light'],
html:not([data-mode]) {
  color-scheme: light;
  --bg: #ffffff;
  --bg-subtle: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f3f5f8;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #1f2329;
  --text-muted: #5b636e;
  --heading: #0a0a0a;
  --brand: #2563eb;
  --brand-hover: #1d4ed8;
  --brand-ink: #1d4ed8;
  --brand-soft: rgba(37, 99, 235, 0.08);
  --brand-ring: rgba(37, 99, 235, 0.35);
  --on-brand: #ffffff;
  --code-bg: #f7f8fa;
  --inline-code-bg: #eef2f8;
  --shadow-sm: 0 1px 2px rgba(10, 10, 10, 0.04), 0 1px 3px rgba(10, 10, 10, 0.06);
  --shadow-md: 0 4px 10px -2px rgba(10, 10, 10, 0.06), 0 12px 28px -8px rgba(10, 10, 10, 0.12);
  --topbar-bg: rgba(255, 255, 255, 0.78);

  /* Category hues — all within the blue/black family */
  --c-sky: #0369a1;
  --c-royal: #2563eb;
  --c-navy: #1e3a8a;
  --c-ink: #111827;
  --c-steel: #3b5a8c;

  --bs-primary-rgb: 37, 99, 235;
  --bs-link-color-rgb: 37, 99, 235;
  --bs-link-hover-color-rgb: 29, 78, 216;
}

html[data-mode='dark'] {
  color-scheme: dark;
  --bg: #0a0a0b;
  --bg-subtle: #0d0e10;
  --surface: #111215;
  --surface-2: #17191d;
  --border: #23262b;
  --border-strong: #31353b;
  --text: #d6d9de;
  --text-muted: #8f96a0;
  --heading: #fafafa;
  --brand: #3b82f6;
  --brand-hover: #60a5fa;
  --brand-ink: #60a5fa;
  --brand-soft: rgba(59, 130, 246, 0.12);
  --brand-ring: rgba(96, 165, 250, 0.45);
  --on-brand: #ffffff;
  --code-bg: #0e0f12;
  --inline-code-bg: #1a1d23;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 30px -10px rgba(0, 0, 0, 0.7);
  --topbar-bg: rgba(10, 10, 11, 0.75);

  --c-sky: #38bdf8;
  --c-royal: #60a5fa;
  --c-navy: #93c5fd;
  --c-ink: #e5e7eb;
  --c-steel: #a5b8d6;

  --bs-primary-rgb: 59, 130, 246;
  --bs-link-color-rgb: 96, 165, 250;
  --bs-link-hover-color-rgb: 147, 197, 253;
}

/* Legacy variable names consumed by page-level styles */
html {
  --main-bg: var(--bg);
  --card-bg: var(--surface);
  --card-border-color: var(--border);
  --card-header-bg: var(--surface-2);
  --card-hover-bg: var(--surface-2);
  --card-shadow: var(--shadow-sm);
  --main-border-color: var(--border);
  --btn-border-color: var(--border);
  --heading-color: var(--heading);
  --text-color: var(--text);
  --text-muted-color: var(--text-muted);
  --text-muted-highlight-color: var(--text);
  --link-color: var(--brand);
  --sidebar-bg: var(--bg-subtle);
  --sidebar-hover-bg: var(--surface-2);
  --tag-hover: var(--surface-2);
  --dash-color: var(--border-strong);
  --timeline-color: var(--border);
  --timeline-node-bg: var(--border-strong);
  --toc-highlight: var(--brand);
  --language-border-color: var(--border);
  --highlight-bg-color: var(--code-bg);

  /* Bootstrap bridge */
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-emphasis-color: var(--heading);
  --bs-heading-color: var(--heading);
  --bs-secondary-color: var(--text-muted);
  --bs-tertiary-color: var(--text-muted);
  --bs-secondary-bg: var(--surface-2);
  --bs-tertiary-bg: var(--surface-2);
  --bs-border-color: var(--border);
  --bs-border-color-translucent: var(--border);
  --bs-link-color: var(--brand);
  --bs-link-hover-color: var(--brand-hover);
  --bs-primary: var(--brand);
  --bs-body-font-family: var(--font-sans);
  --bs-font-sans-serif: var(--font-sans);
  --bs-font-monospace: var(--font-mono);
  --bs-border-radius: var(--radius-sm);
  --bs-focus-ring-color: var(--brand-ring);
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
html {
  scroll-padding-top: calc(var(--topbar-h) + 1rem);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--brand);
  color: var(--on-brand);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--brand-hover);
}

code, pre, kbd, samp {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

kbd {
  font-size: 0.75em;
  padding: 0.15em 0.45em;
  border-radius: 5px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  background: var(--surface);
  color: var(--text);
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

::placeholder {
  color: var(--text-muted) !important;
  opacity: 0.8;
}

hr {
  border-color: var(--border);
  opacity: 1;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 2000;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
  color: var(--on-brand);
}

/* --------------------------------------------------------------------------
   3. Bootstrap component theming
   -------------------------------------------------------------------------- */
.text-muted { color: var(--text-muted) !important; }
.text-primary { color: var(--brand) !important; }
.bg-light { background-color: var(--surface-2) !important; }
.border, .border-top, .border-bottom, .border-start, .border-end { border-color: var(--border) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }

.btn {
  --bs-btn-font-weight: 600;
  --bs-btn-border-radius: var(--radius-sm);
  --bs-btn-focus-box-shadow: 0 0 0 3px var(--brand-ring);
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.btn-primary {
  --bs-btn-color: var(--on-brand);
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-color: var(--on-brand);
  --bs-btn-hover-bg: var(--brand-hover);
  --bs-btn-hover-border-color: var(--brand-hover);
  --bs-btn-active-color: var(--on-brand);
  --bs-btn-active-bg: var(--brand-hover);
  --bs-btn-active-border-color: var(--brand-hover);
  --bs-btn-disabled-bg: var(--brand);
  --bs-btn-disabled-border-color: var(--brand);
}

.btn-outline-primary {
  --bs-btn-color: var(--brand);
  --bs-btn-border-color: var(--border-strong);
  --bs-btn-hover-color: var(--on-brand);
  --bs-btn-hover-bg: var(--brand);
  --bs-btn-hover-border-color: var(--brand);
  --bs-btn-active-color: var(--on-brand);
  --bs-btn-active-bg: var(--brand-hover);
  --bs-btn-active-border-color: var(--brand-hover);
}

.btn-outline-secondary {
  --bs-btn-color: var(--text);
  --bs-btn-border-color: var(--border);
  --bs-btn-hover-color: var(--heading);
  --bs-btn-hover-bg: var(--surface-2);
  --bs-btn-hover-border-color: var(--border-strong);
  --bs-btn-active-color: var(--heading);
  --bs-btn-active-bg: var(--surface-2);
  --bs-btn-active-border-color: var(--border-strong);
  --bs-btn-disabled-color: var(--text-muted);
  --bs-btn-disabled-border-color: var(--border);
}

.btn-link {
  --bs-btn-color: var(--brand);
  --bs-btn-hover-color: var(--brand-hover);
}

.card {
  --bs-card-bg: var(--surface);
  --bs-card-border-color: var(--border);
  --bs-card-cap-bg: var(--surface-2);
  --bs-card-border-radius: var(--radius);
  --bs-card-inner-border-radius: calc(var(--radius) - 1px);
  color: var(--text);
}

.list-group {
  --bs-list-group-bg: transparent;
  --bs-list-group-border-color: var(--border);
  --bs-list-group-color: var(--text);
}

.badge.bg-secondary {
  background-color: var(--surface-2) !important;
  color: var(--text-muted) !important;
  border: 1px solid var(--border);
  font-weight: 600;
}

.alert-info {
  --bs-alert-bg: var(--brand-soft);
  --bs-alert-border-color: color-mix(in srgb, var(--brand) 25%, transparent);
  --bs-alert-color: var(--text);
  border-radius: var(--radius);
}

.form-control,
.form-select {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
}

.form-control:focus,
.form-select:focus {
  background-color: var(--surface);
  border-color: var(--brand);
  color: var(--text);
  box-shadow: 0 0 0 3px var(--brand-ring);
}

/* --------------------------------------------------------------------------
   4. Shell: sidebar
   -------------------------------------------------------------------------- */
#sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  z-index: 1050;
  display: flex;
  flex-direction: column;
  background: var(--bg-subtle);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  scrollbar-width: none;
}

#sidebar::-webkit-scrollbar { display: none; }

#sidebar .profile-wrapper {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.75rem 1.25rem 1.5rem;
}

#sidebar #avatar {
  flex-shrink: 0;
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 2px var(--bg-subtle), 0 0 0 3.5px var(--brand);
  transition: transform 0.3s var(--ease);
}

#sidebar #avatar:hover { transform: scale(1.05); }

#sidebar #avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#sidebar .profile-text { min-width: 0; }

#sidebar .site-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--heading);
}

#sidebar .site-title:hover { color: var(--brand); }

#sidebar .site-subtitle {
  margin: 0.2rem 0 0;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--text-muted);
}

#sidebar .sidebar-nav {
  flex: 1 1 auto;
  padding: 0 0.75rem;
}

#sidebar .nav {
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0.75rem 0 1rem;
  border-top: 1px solid var(--border);
}

#sidebar .nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: background-color 0.15s ease, color 0.15s ease;
}

#sidebar .nav-link i {
  width: 1.1rem;
  font-size: 0.88rem;
  text-align: center;
  opacity: 0.85;
}

#sidebar .nav-link:hover {
  background: var(--surface-2);
  color: var(--heading);
}

#sidebar .nav-item.active > .nav-link {
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-weight: 600;
}

#sidebar .nav-item.active > .nav-link i {
  color: var(--brand);
  opacity: 1;
}

#sidebar .nav-item.active > .nav-link::before {
  content: '';
  position: absolute;
  left: -0.75rem;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--brand);
}

#sidebar .sidebar-bottom {
  display: flex;
  gap: 0.4rem;
  padding: 1rem 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
}

#sidebar .sidebar-bottom a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all 0.15s ease;
}

#sidebar .sidebar-bottom a:hover {
  color: var(--on-brand);
  background: var(--brand);
  border-color: var(--brand);
  transform: translateY(-1px);
}

#mask {
  display: none;
}

#sidebar-close {
  display: none;
}

/* --------------------------------------------------------------------------
   5. Shell: main + topbar
   -------------------------------------------------------------------------- */
#main-wrapper {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
  flex: 1 1 auto;
}

.page-container > .row {
  --bs-gutter-x: 2rem;
}

#topbar-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--topbar-h);
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}

#topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

#breadcrumb {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
}

#breadcrumb span:not(:last-child)::after {
  content: '/';
  margin: 0 0.6rem;
  color: var(--border-strong);
}

#breadcrumb span:last-child {
  color: var(--heading);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
}

#breadcrumb a {
  color: var(--text-muted);
}

#breadcrumb a:hover {
  color: var(--brand);
}

#topbar-title {
  display: none;
  flex: 1 1 auto;
  min-width: 0;
  text-align: center;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--heading);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  transition: all 0.15s ease;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--heading);
}

#mode-toggle {
  border-color: var(--border);
}

html[data-mode='dark'] #mode-toggle .icon-moon,
html:not([data-mode='dark']) #mode-toggle .icon-sun {
  display: none;
}

.search-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  width: 240px;
  height: 38px;
  padding: 0 0.5rem 0 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-pill:hover {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}

.search-pill-text {
  flex: 1;
  text-align: left;
}

.search-pill kbd {
  border-bottom-width: 1px;
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 0.7rem;
}

#sidebar-trigger,
#search-trigger {
  display: none;
}

main {
  min-width: 0;
  padding-bottom: 1rem;
}

/* Right panel (recent posts, tags, table of contents) */
#panel-wrapper {
  display: none;
}

/* --------------------------------------------------------------------------
   6. Responsive shell
   -------------------------------------------------------------------------- */
@media (min-width: 1200px) {
  #panel-wrapper {
    display: block;
  }
}

@media (max-width: 991.98px) {
  #sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s var(--ease);
    box-shadow: none;
  }

  #sidebar.sidebar-open {
    transform: translateX(0);
    box-shadow: var(--shadow-md);
  }

  #sidebar-close {
    display: inline-flex;
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    z-index: 1;
    border-color: var(--border);
    background: var(--surface);
  }

  #mask.show {
    display: block !important;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
    z-index: 1040;
  }

  #main-wrapper {
    margin-left: 0;
  }

  #sidebar-trigger {
    display: inline-flex;
  }
}

@media (max-width: 767.98px) {
  #topbar {
    padding: 0 0.75rem;
    gap: 0.5rem;
  }

  #breadcrumb,
  .search-pill {
    display: none;
  }

  #topbar-title {
    display: block;
  }

  #search-trigger {
    display: inline-flex;
  }

  .page-container {
    padding: 1.25rem 1rem 0;
  }

  .page-container > .row {
    --bs-gutter-x: 0;
  }
}

/* --------------------------------------------------------------------------
   7. Page headings
   -------------------------------------------------------------------------- */
.dynamic-title,
main > article > header > h1,
#page-tag > h1,
#page-category > h1 {
  font-size: clamp(1.85rem, 3.4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--heading);
}

/* --------------------------------------------------------------------------
   8. Post cards (PostCard component)
   -------------------------------------------------------------------------- */
.card-wrapper.card {
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s var(--ease);
}

.card-wrapper.card:hover {
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border));
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-preview {
  color: inherit;
}

.post-preview:hover {
  color: inherit;
}

.post-preview .card-body {
  height: 100%;
  padding: 1.35rem 1.5rem;
}

.post-preview .card-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--heading);
  transition: color 0.15s ease;
}

.post-preview:hover .card-title {
  color: var(--brand);
}

.post-preview .card-text p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.preview-img {
  aspect-ratio: 40 / 21;
  overflow: hidden;
  background: var(--surface-2);
}

.post-preview .preview-img {
  height: 100%;
}

.preview-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.post-preview:hover .preview-img img {
  transform: scale(1.03);
}

.post-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.post-meta i {
  color: var(--text-muted);
}

.post-meta a {
  color: var(--text);
  font-weight: 500;
}

.post-meta a:hover {
  color: var(--brand);
}

.pin {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-ink);
  background: var(--brand-soft);
}

.pin i { color: inherit; }

/* --------------------------------------------------------------------------
   9. Tags, pagination, footer
   -------------------------------------------------------------------------- */
.post-tag.btn {
  --bs-btn-padding-y: 0.22rem;
  --bs-btn-padding-x: 0.65rem;
  --bs-btn-font-size: 0.8rem;
  --bs-btn-font-weight: 500;
  --bs-btn-color: var(--text);
  --bs-btn-bg: var(--surface);
  --bs-btn-border-color: var(--border);
  --bs-btn-hover-color: var(--brand-ink);
  --bs-btn-hover-bg: var(--brand-soft);
  --bs-btn-hover-border-color: color-mix(in srgb, var(--brand) 40%, transparent);
  border-radius: 999px;
  margin: 0 0.35rem 0.45rem 0;
}

.post-tag .badge {
  background: transparent !important;
  border: 0;
  padding: 0 0 0 0.15rem;
}

.post-navigation .btn {
  border-radius: var(--radius-sm);
}

.pagination-numbers .btn {
  min-width: 2.1rem;
}

footer {
  padding: 2rem 0 1.5rem;
  margin-top: 3rem !important;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  gap: 0.5rem;
}

footer a {
  color: var(--heading);
  font-weight: 600;
}

footer a:hover {
  color: var(--brand);
}

#back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 999;
  width: 44px;
  height: 44px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: var(--on-brand);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.25s var(--ease);
}

#back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

#back-to-top:hover {
  background: var(--brand-hover);
  border-color: var(--brand-hover);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   10. Right panel
   -------------------------------------------------------------------------- */
#panel-wrapper .access,
#toc-wrapper {
  position: sticky;
  top: calc(var(--topbar-h) + 1.5rem);
}

#panel-wrapper section {
  padding: 1.1rem 1.15rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.panel-heading {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0;
}

#access-lastmod ul {
  margin: 0.6rem 0 0 !important;
}

#access-lastmod li {
  font-size: 0.88rem;
}

#panel-wrapper #access-lastmod a {
  color: var(--text);
  text-decoration: none;
}

#panel-wrapper #access-lastmod a:hover {
  color: var(--brand);
}

#toc-wrapper {
  max-height: calc(100vh - var(--topbar-h) - 3rem);
  overflow-y: auto;
  padding-right: 0.5rem !important;
}

#toc-wrapper .panel-heading {
  padding: 0 0 0.6rem 0.85rem !important;
}

#toc ul {
  border-left: 1px solid var(--border);
}

#toc .toc-link {
  display: block;
  margin-left: -1px;
  padding: 0.3rem 0.85rem;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.15s ease, border-color 0.15s ease;
}

#toc .toc-link:hover {
  color: var(--heading);
}

#toc .toc-link.active {
  color: var(--brand);
  font-weight: 600;
  border-left-color: var(--brand);
}

#toc .toc-item-h3 .toc-link {
  padding-left: 1.6rem;
  font-size: 0.8rem;
}

/* Mobile contents: floating pill + bottom sheet, below the width where the panel shows */
#toc-mobile {
  /* Sits inside a Bootstrap .row; keep it from taking up a column */
  display: contents;
}

.toc-fab {
  position: fixed;
  left: 1rem;
  bottom: 1.5rem;
  z-index: 998;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: min(320px, calc(100% - 6rem));
  height: 44px;
  padding: 0 1rem;
  border: 1px solid var(--border);
  border-radius: 9999px;
  background: var(--surface);
  color: var(--heading);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.toc-fab i {
  flex-shrink: 0;
  color: var(--brand);
}

.toc-fab-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toc-sheet {
  position: fixed;
  inset: 0;
  z-index: 1060;
}

.toc-sheet[hidden] {
  display: none;
}

.toc-sheet-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
}

.toc-sheet-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  max-height: 75vh;
  padding: 0.75rem 0.75rem calc(1rem + env(safe-area-inset-bottom));
  border-radius: 1.1rem 1.1rem 0 0;
  background: var(--surface);
  box-shadow: 0 -10px 30px -12px rgba(0, 0, 0, 0.35);
  animation: toc-sheet-in 0.22s var(--ease);
}

@keyframes toc-sheet-in {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.toc-sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0.5rem 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

.toc-sheet nav {
  overflow-y: auto;
  padding-top: 0.4rem;
}

.toc-sheet .toc-link {
  display: block;
  padding: 0.6rem 0.85rem;
  border-radius: 0.5rem;
  font-size: 0.92rem;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  border-bottom: none !important;
}

.toc-sheet .toc-item-h3 .toc-link {
  padding-left: 1.85rem;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.toc-sheet .toc-link.active {
  color: var(--brand);
  font-weight: 600;
  background: color-mix(in srgb, var(--brand) 9%, transparent);
}

@media (min-width: 1200px) {
  #toc-mobile {
    display: none;
  }
}

@media (min-width: 640px) {
  .toc-sheet-panel {
    left: 50%;
    right: auto;
    width: 560px;
    transform: translateX(-50%);
    animation: none;
  }
}

/* --------------------------------------------------------------------------
   11. Article
   -------------------------------------------------------------------------- */
main > article > header .post-desc {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--text-muted) !important;
}

main > article > header .post-meta {
  border-color: var(--border) !important;
}

main > article > header .preview-img {
  border-radius: var(--radius-lg) !important;
  border: 1px solid var(--border);
  box-shadow: none !important;
}

.content {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text);
  overflow-wrap: break-word;
}

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

.content h2,
.content h3,
.content h4,
.content h5 {
  scroll-margin-top: calc(var(--topbar-h) + 1rem);
}

.content h2 {
  font-size: 1.6rem;
  margin: 2.6rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--border);
}

.content h3 {
  font-size: 1.3rem;
  margin: 2rem 0 0.8rem;
}

.content h4 {
  font-size: 1.1rem;
  margin: 1.6rem 0 0.6rem;
}

.content h5 {
  font-size: 1rem;
  margin: 1.4rem 0 0.5rem;
}

.content p {
  margin-bottom: 1.15rem;
}

.content a:not(.btn):not(.post-tag) {
  color: var(--brand);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--brand) 35%, transparent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.content a:not(.btn):not(.post-tag):hover {
  text-decoration-color: currentColor;
}

.content ul,
.content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.15rem;
}

.content li {
  margin: 0.3rem 0;
}

.content li::marker {
  color: var(--brand);
}

.content strong {
  color: var(--heading);
  font-weight: 650;
}

.content blockquote {
  margin: 1.5rem 0;
  padding: 0.25rem 1.25rem;
  border-left: 3px solid var(--border-strong);
  color: var(--text-muted);
}

.content blockquote > :last-child {
  margin-bottom: 0;
}

.content hr {
  margin: 2.5rem 0;
}

.content :not(pre) > code {
  padding: 0.15em 0.4em;
  border-radius: 5px;
  font-size: 0.86em;
  background: var(--inline-code-bg);
  color: var(--brand-ink);
  word-break: break-word;
}

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

.content table th,
.content table td {
  padding: 0.6rem 0.9rem;
  border: 1px solid var(--border);
}

.content table thead th {
  background: var(--surface-2);
  color: var(--heading);
  font-weight: 650;
  white-space: nowrap;
}

.content table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--surface-2) 50%, transparent);
}

.content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.75rem auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.content figure figcaption,
.content img + em {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: -1rem;
  margin-bottom: 1.5rem;
}

.content .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.25rem 0;
}

.content .footnotes {
  margin-top: 3rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.content :target {
  background: var(--brand-soft);
  border-radius: 4px;
}

/* Callout prompts */
.content blockquote.prompt-tip,
.content blockquote.prompt-info,
.content blockquote.prompt-warning,
.content blockquote.prompt-danger {
  position: relative;
  padding: 0.9rem 1.15rem 0.9rem 2.9rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius-sm);
  background: var(--brand-soft);
  color: var(--text);
}

.content blockquote[class^='prompt-']::before {
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 1.05rem;
  top: 0.95rem;
  color: var(--brand);
}

.content blockquote.prompt-tip::before { content: '\f0eb'; }
.content blockquote.prompt-info::before { content: '\f05a'; }
.content blockquote.prompt-warning::before { content: '\f06a'; }
.content blockquote.prompt-danger::before { content: '\f071'; }

.content blockquote.prompt-tip { border-left-color: var(--c-sky); }
.content blockquote.prompt-tip::before { color: var(--c-sky); }
.content blockquote.prompt-warning,
.content blockquote.prompt-danger {
  border-left-color: var(--heading);
  background: var(--surface-2);
}
.content blockquote.prompt-warning::before,
.content blockquote.prompt-danger::before { color: var(--heading); }

/* Post tail */
.post-tail-wrapper {
  border-color: var(--border) !important;
}

.post-tags > i {
  vertical-align: middle;
}

.share-label {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem !important;
}

.share-icons .share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  transition: all 0.15s ease;
}

.share-icons .share-btn:hover {
  color: var(--on-brand);
  background: var(--brand);
  border-color: var(--brand);
  transform: translateY(-2px);
}

.post-navigation.row {
  border-color: var(--border) !important;
}

.post-navigation .btn-outline-secondary {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
}

.post-navigation .btn-outline-secondary:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-soft);
}

/* --------------------------------------------------------------------------
   12. Code blocks
   -------------------------------------------------------------------------- */
.astro-code {
  margin: 0 0 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.6;
  background-color: var(--code-bg) !important;
}

html[data-mode='dark'] .astro-code,
html[data-mode='dark'] .astro-code span {
  color: var(--shiki-dark) !important;
  background-color: transparent !important;
  font-style: var(--shiki-dark-font-style) !important;
  font-weight: var(--shiki-dark-font-weight) !important;
  text-decoration: var(--shiki-dark-text-decoration) !important;
}

html:not([data-mode='dark']) .astro-code,
html:not([data-mode='dark']) .astro-code span {
  color: var(--shiki-light);
  background-color: transparent !important;
  font-style: var(--shiki-light-font-style);
  font-weight: var(--shiki-light-font-weight);
  text-decoration: var(--shiki-light-text-decoration);
}

.code-block-wrapper {
  position: relative;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--code-bg);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.6rem 0.4rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.code-block-wrapper .astro-code {
  border: none;
  border-radius: 0;
  margin-bottom: 0;
}

.copy-code-btn {
  padding: 0.2rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-code-btn:hover {
  color: var(--brand);
  border-color: var(--border);
  background: var(--surface);
}

/* --------------------------------------------------------------------------
   13. Search modal
   -------------------------------------------------------------------------- */
.search-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1100;
  overflow-y: auto;
}

.search-modal.active {
  display: block;
}

.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.search-modal-dialog {
  position: relative;
  max-width: 640px;
  margin: 10vh auto 2rem;
  padding: 0 1rem;
  z-index: 1101;
}

.search-modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.search-input-wrapper > i {
  color: var(--brand) !important;
}

.search-input-wrapper input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--heading);
}

.search-results-list {
  max-height: 460px;
  overflow-y: auto;
  padding: 0.5rem;
  margin: 0;
  list-style: none;
}

.search-result-item {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  color: inherit;
  transition: background 0.12s ease;
}

.search-result-item:hover,
.search-result-item.focused {
  background: var(--brand-soft);
  border-left-color: var(--brand);
  color: inherit;
}

.search-result-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--heading);
  margin-bottom: 0.2rem;
}

.search-result-item.focused .search-result-title {
  color: var(--brand-ink);
}

.search-result-snippet {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-meta {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   14. Listing pages: categories, tag/category detail
   -------------------------------------------------------------------------- */
.categories-list .card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: none !important;
  transition: border-color 0.2s ease;
}

.categories-list .card:hover {
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border)) !important;
}

.categories-list .card-header {
  padding: 0.9rem 1.15rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.categories-list .card-header a {
  color: var(--heading);
}

.categories-list .card-header a:hover {
  color: var(--brand);
}

.categories-list .list-group-item {
  padding: 0.65rem 1.15rem;
}

.categories-list .list-group-item a:not(.small) {
  color: var(--text);
}

.categories-list .list-group-item a:hover {
  color: var(--brand) !important;
}

#page-tag .content li,
#page-category .content li {
  border-color: var(--border) !important;
  border-radius: var(--radius-sm);
  transition: background 0.15s ease;
}

#page-tag .content li:hover,
#page-category .content li:hover {
  background: var(--surface-2);
}

#page-tag .content li a,
#page-category .content li a {
  color: var(--heading);
  font-weight: 500;
}

#page-tag .content li a:hover,
#page-category .content li a:hover {
  color: var(--brand);
}

.dash {
  border-bottom: 1px dashed var(--border-strong) !important;
  align-self: center;
}

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

/* --------------------------------------------------------------------------
   Category tones: one distinct colour per category, shared by the
   filter chips and card badges on the listing pages.
   -------------------------------------------------------------------------- */
.cat-tone-all { --cat: var(--brand); }
.cat-tone-general,
.cat-tone-lab { --cat: #64748b; }
.cat-tone-software { --cat: #0891b2; }
/* Resource categories */
.cat-tone-machine-learning { --cat: #7c3aed; }
.cat-tone-power-bi { --cat: #ca8a04; }
.cat-tone-data-analytics { --cat: #0d9488; }
.cat-tone-generative-ai { --cat: #c026d3; }
.cat-tone-deep-learning { --cat: #e11d48; }
.cat-tone-python { --cat: #16a34a; }
/* Content types (homepage stats and section headings) */
.cat-tone-sec-blog { --cat: #0284c7; }
.cat-tone-sec-projects { --cat: #7c3aed; }
.cat-tone-sec-experiments { --cat: #e11d48; }
.cat-tone-sec-snippets { --cat: #0d9488; }
.cat-tone-data-engineering { --cat: #0d9488; }
.cat-tone-machine-learning-ai { --cat: #7c3aed; }
.cat-tone-business-intelligence { --cat: #d97706; }
.cat-tone-sql-analytics { --cat: #2563eb; }
.cat-tone-azure-cloud { --cat: #0284c7; }
.cat-tone-generative-ai-llms { --cat: #c026d3; }
.cat-tone-power-bi-power-platform { --cat: #ca8a04; }
.cat-tone-python-machine-learning { --cat: #16a34a; }
.cat-tone-sql-databases { --cat: #4f46e5; }
.cat-tone-agentic-ai { --cat: #7c3aed; }
.cat-tone-rag-retrieval { --cat: #0d9488; }
.cat-tone-prompt-engineering { --cat: #ea580c; }
.cat-tone-evaluation-benchmarks { --cat: #2563eb; }
.cat-tone-safety-guardrails { --cat: #e11d48; }
.cat-tone-ai-in-analytics { --cat: #d97706; }
.cat-tone-lang-python { --cat: #2563eb; }
.cat-tone-lang-sql { --cat: #ea580c; }
.cat-tone-lang-javascript { --cat: #ca8a04; }
.cat-tone-lang-typescript { --cat: #0284c7; }
.cat-tone-lang-bash { --cat: #16a34a; }
.cat-tone-lang-powershell { --cat: #4f46e5; }
.cat-tone-lang-json { --cat: #0d9488; }
.cat-tone-lang-yaml { --cat: #db2777; }
.cat-tone-lang-dax { --cat: #d97706; }
.cat-tone-lang-notes { --cat: #64748b; }
.cat-tone-certification { --cat: #059669; }
.cat-tone-certificate { --cat: #2563eb; }
.cat-tone-badge { --cat: #d97706; }

html[data-mode='dark'] .cat-tone-data-engineering { --cat: #2dd4bf; }
html[data-mode='dark'] .cat-tone-machine-learning-ai { --cat: #a78bfa; }
html[data-mode='dark'] .cat-tone-business-intelligence { --cat: #fbbf24; }
html[data-mode='dark'] .cat-tone-sql-analytics { --cat: #60a5fa; }
html[data-mode='dark'] .cat-tone-azure-cloud { --cat: #38bdf8; }
html[data-mode='dark'] .cat-tone-generative-ai-llms { --cat: #e879f9; }
html[data-mode='dark'] .cat-tone-power-bi-power-platform { --cat: #facc15; }
html[data-mode='dark'] .cat-tone-python-machine-learning { --cat: #4ade80; }
html[data-mode='dark'] .cat-tone-sql-databases { --cat: #818cf8; }
html[data-mode='dark'] .cat-tone-agentic-ai { --cat: #a78bfa; }
html[data-mode='dark'] .cat-tone-rag-retrieval { --cat: #2dd4bf; }
html[data-mode='dark'] .cat-tone-prompt-engineering { --cat: #fb923c; }
html[data-mode='dark'] .cat-tone-evaluation-benchmarks { --cat: #60a5fa; }
html[data-mode='dark'] .cat-tone-safety-guardrails { --cat: #fb7185; }
html[data-mode='dark'] .cat-tone-ai-in-analytics { --cat: #fbbf24; }
html[data-mode='dark'] .cat-tone-lang-python { --cat: #60a5fa; }
html[data-mode='dark'] .cat-tone-lang-sql { --cat: #fb923c; }
html[data-mode='dark'] .cat-tone-lang-javascript { --cat: #facc15; }
html[data-mode='dark'] .cat-tone-lang-typescript { --cat: #38bdf8; }
html[data-mode='dark'] .cat-tone-lang-bash { --cat: #4ade80; }
html[data-mode='dark'] .cat-tone-lang-powershell { --cat: #818cf8; }
html[data-mode='dark'] .cat-tone-lang-json { --cat: #2dd4bf; }
html[data-mode='dark'] .cat-tone-lang-yaml { --cat: #f472b6; }
html[data-mode='dark'] .cat-tone-lang-dax { --cat: #fbbf24; }
html[data-mode='dark'] .cat-tone-lang-notes { --cat: #94a3b8; }
html[data-mode='dark'] .cat-tone-certification { --cat: #34d399; }
html[data-mode='dark'] .cat-tone-software { --cat: #22d3ee; }
html[data-mode='dark'] .cat-tone-machine-learning { --cat: #a78bfa; }
html[data-mode='dark'] .cat-tone-power-bi { --cat: #facc15; }
html[data-mode='dark'] .cat-tone-data-analytics { --cat: #2dd4bf; }
html[data-mode='dark'] .cat-tone-generative-ai { --cat: #e879f9; }
html[data-mode='dark'] .cat-tone-deep-learning { --cat: #fb7185; }
html[data-mode='dark'] .cat-tone-python { --cat: #4ade80; }
html[data-mode='dark'] .cat-tone-sec-blog { --cat: #38bdf8; }
html[data-mode='dark'] .cat-tone-sec-projects { --cat: #a78bfa; }
html[data-mode='dark'] .cat-tone-sec-experiments { --cat: #fb7185; }
html[data-mode='dark'] .cat-tone-sec-snippets { --cat: #2dd4bf; }
html[data-mode='dark'] .cat-tone-certificate { --cat: #60a5fa; }
html[data-mode='dark'] .cat-tone-badge { --cat: #fbbf24; }

[class*='cat-tone-'] {
  /* darkened in light mode so tinted text stays readable */
  --cat-text: color-mix(in srgb, var(--cat) 80%, #000);
  --cat-on: #ffffff;
}

html[data-mode='dark'] [class*='cat-tone-'] {
  --cat-text: var(--cat);
  --cat-on: #0b1220;
}

.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.84rem;
  font-weight: 500;
  line-height: 1.2;
  padding: 0.3rem 0.85rem 0.3rem 0.3rem;
  border-radius: 9999px;
  border: 1px solid color-mix(in srgb, var(--cat) 30%, transparent);
  background-color: color-mix(in srgb, var(--cat) 8%, var(--surface));
  color: var(--text);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease,
    transform 0.2s ease, box-shadow 0.2s ease;
}

.cat-chip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  font-size: 0.8rem;
  color: var(--cat-text);
  background-color: color-mix(in srgb, var(--cat) 18%, transparent);
  transition: inherit;
}

.cat-chip strong {
  color: var(--cat-text);
}

.cat-chip:hover {
  background-color: color-mix(in srgb, var(--cat) 15%, var(--surface));
  border-color: color-mix(in srgb, var(--cat) 55%, transparent);
  transform: translateY(-1px);
}

.cat-chip:focus-visible {
  outline: 2px solid var(--cat);
  outline-offset: 2px;
}

.cat-chip.active {
  background-color: var(--cat);
  border-color: var(--cat);
  color: var(--cat-on);
  font-weight: 600;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--cat) 35%, transparent);
}

.cat-chip.active strong,
.cat-chip.active .cat-chip-icon {
  color: var(--cat-on);
}

.cat-chip.active .cat-chip-icon {
  background-color: color-mix(in srgb, var(--cat-on) 22%, transparent);
}

.cat-badge[class*='cat-tone-'] {
  background-color: color-mix(in srgb, var(--cat) 12%, transparent);
  color: var(--cat-text);
  border: 1px solid color-mix(in srgb, var(--cat) 30%, transparent);
}

/* Right-panel content can outgrow the viewport once filters live there */
#panel-wrapper .access {
  max-height: calc(100vh - var(--topbar-h) - 3rem);
  overflow-y: auto;
  scrollbar-width: thin;
  padding-bottom: 0.5rem;
}

/* --------------------------------------------------------------------------
   Browse pages (categories, tags, archives, thoughts): shared hero header,
   section headings and list rows, toned with the cat-tone-* classes.
   The .tax-head box is also used on its own by the listing pages.
   -------------------------------------------------------------------------- */
.tax-page h1,
.tax-page h2,
.tax-page h3,
.tax-head h1 {
  margin: 0;
}

.tax-page,
.tax-head,
.tax-page [class*='cat-tone-'] {
  --tone: var(--cat, var(--brand));
  --tone-ink: var(--cat-text, var(--brand-ink));
}

.tax-head {
  position: relative;
  padding: 1.75rem 1.5rem;
  margin-bottom: 2rem;
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  overflow: hidden;
  background:
    radial-gradient(480px circle at 0% 0%, color-mix(in srgb, var(--tone) 15%, transparent), transparent 60%),
    radial-gradient(420px circle at 100% 100%, color-mix(in srgb, var(--c-royal) 10%, transparent), transparent 60%),
    var(--surface);
}

.tax-head::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 75%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 75%);
  pointer-events: none;
}

.tax-head > * {
  position: relative;
}

@media (min-width: 768px) {
  .tax-head {
    padding: 2.25rem 2.25rem 2rem;
  }
}

.tax-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--tone-ink);
  background-color: color-mix(in srgb, var(--tone) 12%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--tone) 28%, transparent);
}

.tax-eyebrow a {
  color: inherit;
  text-decoration: none;
  border-bottom: none !important;
}

.tax-eyebrow a:hover {
  text-decoration: underline;
}

.tax-title-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.tax-title {
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--heading-color, var(--text));
  overflow-wrap: anywhere;
}

.tax-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 0.85rem;
  font-size: 1.2rem;
  color: var(--tone-ink);
  background-color: color-mix(in srgb, var(--tone) 15%, transparent);
}

.tax-lead {
  max-width: 640px;
  margin: 0.65rem 0 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.tax-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.tax-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.35rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--main-bg, var(--surface));
  border: 1px solid var(--border);
}

.tax-stat strong {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--tone-ink);
}

/* Section headings inside browse pages */
.tax-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.tax-kicker {
  margin: 0 0 0.15rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tone-ink);
}

.tax-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--heading-color, var(--text));
}

/* Bordered list of linked rows */
.tax-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  overflow: hidden;
}

.tax-list > li {
  margin: 0;
  padding: 0;
}

.tax-list > li + li {
  border-top: 1px solid var(--border);
}

.tax-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.8rem 1.1rem;
  color: var(--text);
  text-decoration: none;
  border-bottom: none !important;
  transition: background-color 0.2s ease;
}

.tax-row:hover {
  background-color: color-mix(in srgb, var(--tone) 6%, var(--surface));
}

.tax-row-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 0.6rem;
  font-size: 0.85rem;
  color: var(--tone-ink);
  background-color: color-mix(in srgb, var(--tone) 14%, transparent);
}

.tax-row-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.tax-row-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--heading-color, var(--text));
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.tax-row:hover .tax-row-title {
  color: var(--tone-ink);
}

.tax-row-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tax-row-arrow {
  flex-shrink: 0;
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

.tax-row:hover .tax-row-arrow {
  transform: translateX(3px);
  color: var(--tone-ink);
}

.tax-date {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.55rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text-muted);
  background-color: var(--surface-2);
}

.tax-badge {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--tone-ink);
  background-color: color-mix(in srgb, var(--tone) 13%, transparent);
}

/* Tag pill with a count, used on the tags pages */
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.4rem 0.3rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-bottom: 1px solid var(--border) !important;
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.tag-chip:hover {
  color: var(--brand-ink);
  border-color: var(--brand) !important;
  background-color: color-mix(in srgb, var(--brand) 7%, var(--surface));
  transform: translateY(-1px);
}

.tag-chip-count {
  min-width: 1.4rem;
  padding: 0.12rem 0.4rem;
  border-radius: 9999px;
  font-size: 0.68rem;
  font-weight: 700;
  text-align: center;
  color: var(--text-muted);
  background-color: var(--surface-2);
}

.tag-chip:hover .tag-chip-count {
  color: var(--brand-ink);
  background-color: color-mix(in srgb, var(--brand) 14%, transparent);
}

@media (max-width: 575.98px) {
  .tax-row {
    padding: 0.75rem 0.85rem;
  }
  .tax-row .tax-date {
    display: none;
  }
}