.md-article-section {
  --article-bg: var(--bs-body-bg);
  --article-surface: var(--bs-tertiary-bg);
  --article-border: rgba(var(--bs-emphasis-color-rgb), 0.12);
  --article-muted: var(--bs-secondary-color);
  --article-highlight: rgba(var(--bs-warning-rgb), 0.18);
  --article-callout-bg: rgba(var(--bs-primary-rgb), 0.08);
  --article-quote-border: var(--bs-primary);
  --navbar-height: 72px;

  position: relative;
  isolation: isolate;
  overflow: visible; /* otherwise aside sticky will not work */
  background-color: var(--bs-body-bg);
  color: var(--bs-body-color);
  padding: 2%;
  border-radius: 1rem;
}

/* article section background image */
.md-article-section::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;

  background-image: var(--section-image);
  background-size: cover;
  background-position: left top;
  background-repeat: no-repeat;

  opacity: 0.24;
  transform-origin: center top;
  transform: scaleX(-1);

  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 1) 0vh,
    rgba(0, 0, 0, 0.95) 8vh,
    rgba(0, 0, 0, 0.80) 16vh,
    rgba(0, 0, 0, 0.55) 26vh,
    rgba(0, 0, 0, 0.28) 36vh,
    rgba(0, 0, 0, 0.10) 43vh,
    rgba(0, 0, 0, 0.015) 47vh,
    rgba(0, 0, 0, 0) 50vh
  );
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 1) 0vh,
    rgba(0, 0, 0, 0.95) 8vh,
    rgba(0, 0, 0, 0.80) 16vh,
    rgba(0, 0, 0, 0.55) 26vh,
    rgba(0, 0, 0, 0.28) 36vh,
    rgba(0, 0, 0, 0.10) 43vh,
    rgba(0, 0, 0, 0.015) 47vh,
    rgba(0, 0, 0, 0) 50vh
  );
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;

  filter: saturate(0.92) brightness(1.02);
}

.md-article-section::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;

  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--bs-body-bg) 0%, transparent) 0%,
    color-mix(in srgb, var(--bs-body-bg) 4%, transparent) 9%,
    color-mix(in srgb, var(--bs-body-bg) 8%, transparent) 16%,
    color-mix(in srgb, var(--bs-body-bg) 14%, transparent) 24%,
    color-mix(in srgb, var(--bs-body-bg) 22%, transparent) 34%,
    color-mix(in srgb, var(--bs-body-bg) 38%, transparent) 40%,
    color-mix(in srgb, var(--bs-body-bg) 60%, transparent) 45%,
    color-mix(in srgb, var(--bs-body-bg) 82%, transparent) 59%,
    var(--bs-body-bg) 100%
  );
}


:root {
  --article-accent: #6750f5;
  --article-accent-soft: rgba(103, 80, 245, 0.12);
  --article-radius: 1.25rem;
}


.article-media-card {
  --article-media-height: 340px;

  border-top-right-radius: 1rem;
  border-top-left-radius: 1rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background-color: var(--bs-tertiary-bg);
  box-shadow: var(--article-media-shadow);
  transform: translateZ(0);
}

.article-media-image {
  display: block;
  width: 100%;
  height: var(--article-media-height);
  object-fit: cover;
  border-radius: inherit;
  transform: scale(1.001);
}

.article-media-image-dark {
  display: none;
}

[data-bs-theme="dark"] .article-media-image-light {
  display: none;
}

[data-bs-theme="dark"] .article-media-image-dark {
  display: block;
}

.article-media-overlay {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  transition: background 0.25s ease;
}

[data-bs-theme="light"] .article-media-card {
  border: 1px solid rgba(0, 0, 0, 0.06);
  background-color: var(--bs-body-bg);
}

[data-bs-theme="light"] .article-media-overlay {
  background:
    linear-gradient(
      to top,
      rgba(21, 28, 40, 0.60) 0%,
      rgba(21, 28, 40, 0.34) 36%,
      rgba(21, 28, 40, 0.14) 64%,
      rgba(21, 28, 40, 0.04) 100%
    ),
    linear-gradient(
      to right,
      rgba(255, 255, 255, 0.08) 0%,
      rgba(255, 255, 255, 0.00) 45%
    );
}

[data-bs-theme="dark"] .article-media-card {
  border: 1px solid rgba(255, 255, 255, 0.07);
  background-color: var(--bs-tertiary-bg);
}

[data-bs-theme="dark"] .article-media-overlay {
  background:
    linear-gradient(
      to top,
      rgba(0, 0, 0, 0.84) 0%,
      rgba(0, 0, 0, 0.58) 36%,
      rgba(0, 0, 0, 0.24) 64%,
      rgba(0, 0, 0, 0.10) 100%
    ),
    linear-gradient(
      to right,
      rgba(10, 14, 20, 0.20) 0%,
      rgba(10, 14, 20, 0.00) 45%
    );
}

.article-media-content {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  z-index: 2;
  max-width: 78%;
  padding: 1.5rem;
}

.article-media-content .eyebrow {
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-media-content h3 {
  margin-bottom: 0.5rem;
  line-height: 1.15;
}

.article-media-content p {
  margin-bottom: 0;
  line-height: 1.5;
}

[data-bs-theme="light"] .article-media-content .eyebrow {
  color: rgba(255, 255, 255, 0.78);
}

[data-bs-theme="dark"] .article-media-content .eyebrow {
  color: rgba(255, 255, 255, 0.64);
}

[data-bs-theme="light"] .article-media-content h3,
[data-bs-theme="dark"] .article-media-content h3 {
  color: #fff;
}

[data-bs-theme="light"] .article-media-content p {
  color: rgba(255, 255, 255, 0.90);
}

[data-bs-theme="dark"] .article-media-content p {
  color: rgba(255, 255, 255, 0.78);
}

@media (max-width: 991.98px) {
  .article-media-card {
    --article-media-height: 300px;
  }

  .article-media-content {
    max-width: 88%;
    padding: 1.25rem;
  }
}

@media (max-width: 575.98px) {
  .article-media-card {
    --article-media-height: 250px;
    margin-block: 1.5rem;
  }

  .article-media-content {
    max-width: 100%;
    padding: 1rem;
  }

  .article-media-content h3 {
    font-size: 1.25rem;
  }

  .article-media-content p {
    font-size: 0.95rem;
  }
}

.md-article-content-shell {
  background: color-mix(in srgb, var(--bs-body-bg) 86%, var(--bs-tertiary-bg));
  border: 1px solid var(--bs-border-color);
  border-radius: calc(var(--article-radius) + .5rem);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, .08);
  overflow: hidden;
}

.md-article-main-content {
  padding: clamp(1.25rem, 3vw, 3rem);
}

.md-article-eybrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .75rem;
  border-radius: 999px;
  background: var(--article-accent-soft);
  color: var(--article-accent);
  font-weight: 700;
  font-size: .8125rem;
  letter-spacing: .02em;
}

.md-article-card {
  border: 1px solid var(--bs-border-color);
  border-radius: var(--article-radius);
  background: var(--bs-body-bg);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.md-article-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--article-accent) 55%, var(--bs-border-color));
  box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, .10);
}

.md-article-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-grid;
  place-items: center;
  border-radius: .9rem;
  background: var(--article-accent-soft);
  color: var(--article-accent);
  font-weight: 800;
}

.md-article-link {
  text-decoration: none;
  color: inherit;
}

.md-article-link:hover h3 {
  color: var(--article-accent);
}

.md-article-sidebar-wrap {
  padding: clamp(1rem, 2vw, 1.5rem);
  background: var(--bs-tertiary-bg);
  border-left: 1px solid var(--bs-border-color);
  min-height: 100%;
}

.md-article-subject-sidebar {

}

.md-article-sidebar-card {
  border: 1px solid var(--bs-border-color);
  border-radius: var(--article-radius);
  background: var(--bs-body-bg);
  overflow: hidden;
  padding: 1rem;
}

.md-article-sidebar-card-sub {
  border: 1px solid var(--bs-border-color);
  border-radius: var(--article-radius);
  background: var(--bs-body-bg);
  overflow: hidden;
}

.md-article-sidebar-title {
  padding: 1rem 1rem .25rem;
}

.md-article-subject-nav {
  --article-nav-accent: var(--article-accent, #f4a024);
  --article-nav-bg: var(--bs-body-bg);
  --article-nav-bg-hover: var(--bs-secondary-bg);
  --article-nav-border: var(--bs-border-color-translucent);
  --article-nav-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.04);

  display: grid;
  gap: 0.625rem;
}

.md-article-subject-nav .nav-link {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 2.85rem;
  padding: 0.75rem 2.75rem 0.75rem 1rem;
  border: 1px solid var(--article-nav-border);
  border-radius: var(--bs-border-radius-lg);
  background-color: var(--article-nav-bg);
  color: var(--bs-secondary-color);
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  box-shadow: var(--article-nav-shadow);
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.md-article-subject-nav .nav-link::after {
  content: "\f105";
  position: absolute;
  right: 1rem;
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--bs-tertiary-color);
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}

.md-article-subject-nav .nav-link:hover,
.md-article-subject-nav .nav-link:focus-visible {
  color: var(--article-nav-accent);
  border-color: color-mix(in srgb, var(--article-nav-accent) 45%, var(--bs-border-color));
  background-color: var(--article-nav-bg-hover);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.md-article-subject-nav .nav-link:hover::after,
.md-article-subject-nav .nav-link:focus-visible::after {
  color: var(--article-nav-accent);
  transform: translateX(0.2rem);
}

.md-article-subject-nav .nav-link:focus-visible {
  outline: 0;
  box-shadow:
    0 0 0 0.2rem color-mix(in srgb, var(--article-nav-accent) 28%, transparent),
    0 0.5rem 1rem rgba(0, 0, 0, 0.08);
}

.md-article-subject-nav .nav-link.active,
.md-article-subject-nav .nav-link.disabled {
  pointer-events: none;
  cursor: default;
  color: var(--article-nav-accent);
  border-color: color-mix(in srgb, var(--article-nav-accent) 50%, var(--bs-border-color));
  background-color: color-mix(in srgb, var(--article-nav-accent) 10%, var(--bs-body-bg));
  opacity: 1;
}

.md-article-subject-nav .nav-link.active::after,
.md-article-subject-nav .nav-link.disabled::after {
  content: "\f3c5";
  color: var(--article-nav-accent);
  transform: none;
}

[data-bs-theme="dark"] .md-article-subject-nav {
  --article-nav-shadow: none;
}

[data-bs-theme="dark"] .md-article-subject-nav .nav-link:hover,
[data-bs-theme="dark"] .md-article-subject-nav .nav-link:focus-visible {
  box-shadow: none;
}

.md-article-sidebar-badge {
  font-size: .7rem;
  background: var(--bs-secondary-bg);
  color: var(--bs-secondary-color);
  border-radius: 999px;
  padding: .25rem .5rem;
}

.md-article-temp-mode-toggle {
  border-radius: 999px;
}

@media (max-width: 991.98px) {
  .md-article-sidebar-wrap {
    border-left: 0;
    border-top: 1px solid var(--bs-border-color);
  }

  .md-article-subject-sidebar {
    position: static;
  }
}

/* sidebar tip card */

.md-article-sidebar-tip-card {
  margin-top: 2rem;
  max-width: 420px;
  overflow: hidden;

  /* Light mode: soft professional orange */
  --tip-bg: #fff4e6;
  --tip-header-bg: #f4a340;
  --tip-border: #d88424;
  --tip-icon-bg: #d88424;
  --tip-icon-color: #ffffff;
  --tip-title-color: #2b1600;
  --tip-body-color: #3b2a16;

  background-color: var(--tip-bg) !important;
  color: var(--tip-body-color);

  border: 1px solid var(--tip-border) !important;
  border-left-width: 4px !important;
  border-radius: var(--article-radius);

  /* Bootstrap card variable overrides */
  --bs-card-bg: var(--tip-bg);
  --bs-card-color: var(--tip-body-color);
  --bs-card-border-color: var(--tip-border);
  --bs-card-cap-bg: var(--tip-header-bg);
  --bs-card-cap-color: var(--tip-title-color);
}

/* Dark mode: professional dark blue */
[data-bs-theme="dark"] .md-article-sidebar-tip-card {
  --tip-bg: #101827;
  --tip-header-bg: #1e3a5f;
  --tip-border: #2f5f91;
  --tip-icon-bg: #2f5f91;
  --tip-icon-color: #eaf4ff;
  --tip-title-color: #f2f8ff;
  --tip-body-color: #d7e6f5;
}

.md-article-sidebar-tip-card .card-header {
  background-color: var(--tip-header-bg) !important;
  color: var(--tip-title-color) !important;

  border: 0 !important;
  border-bottom: 1px solid var(--tip-border) !important;

  padding: 0.85rem 1rem;
}

.md-article-sidebar-tip-card .card-title {
  margin: 0;
  color: var(--tip-title-color);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.25;
}

.md-article-sidebar-tip-content::after {
  content: "";
  display: block;
  clear: both;
}

.md-article-sidebar-tip-icon {
  float: left;
  width: 3rem;
  height: 3rem;
  margin: 0.1rem 0.85rem 0.35rem 0;

  display: grid;
  place-items: center;
  border-radius: 50%;

  background-color: var(--tip-icon-bg);
  color: var(--tip-icon-color);

  font-size: 1.4rem;
  line-height: 1;
}

.md-article-sidebar-tip-card .card-body {
  background-color: var(--tip-bg) !important;
  color: var(--tip-body-color);
}

.md-article-sidebar-tip-card .card-text {
  color: var(--tip-body-color);
  line-height: 1.5;
}


.md-illustration-img-dark {
  display: none;
}

[data-bs-theme="dark"] .md-illustration-img-light {
  display: none;
}

[data-bs-theme="dark"] .md-illustration-img-dark {
  display: block;
}

/* image modal window */

.image-modal .modal-content {
  min-height: 100vh;
  border: 0;
  border-radius: 0;
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
}

.image-modal .modal-header {
  position: relative;
}

.image-modal .modal-title {
  margin-right: auto;
}


.image-modal .image-modal-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  text-transform: uppercase;
}

.theme-toggle-btn {
  width: 3rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0;
  font-size: 1rem;
  line-height: 1;
}

.image-modal .modal-body {
  padding: 0;
  overflow: hidden;
}

.image-modal img {
  display: block;
  width: 100%;
  height: auto;
}