/* ==========================================================================
   HD Signature Learning Center — Article Styles
   Editorial luxury redesign. Uses site CSS tokens so dark mode is automatic.
   All four article templates import this file.
   ========================================================================== */

/* ── Reading progress bar ──────────────────────────────────────────────────── */

.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--color-signature) 0%, var(--color-signature-light) 100%);
  z-index: 9999;
  transition: width 0.15s ease;
}

/* ── Deep-dive hero section ────────────────────────────────────────────────── */

.deep-dive-hero {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
  padding: 3.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}

.deep-dive-hero::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle at center, var(--color-signature-5) 0%, transparent 65%);
  pointer-events: none;
}

/* ── Article hero image ────────────────────────────────────────────────────── */

.article-hero {
  height: 420px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, var(--color-black-50) 100%);
}

.article-hero-img {
  padding-top: 2rem;
}

.article-hero-img img {
  width: 100%;
  border-radius: 12px;
  display: block;
}

/* ── Layout grids ──────────────────────────────────────────────────────────── */

.article-layout {
  display: grid;
  grid-template-columns: 1fr 264px;
  gap: 4rem;
  padding-top: 3rem;
  padding-bottom: 5rem;
  align-items: start;
}

.guide-layout {
  display: grid;
  grid-template-columns: 1fr 250px;
  gap: 3rem;
  padding-top: 2.5rem;
  padding-bottom: 5rem;
  align-items: start;
}

/* Deep-dive uses same 250px TOC column */
.guide-layout--deep {
  grid-template-columns: 1fr 250px;
  gap: 3rem;
}

@media (max-width: 1023px) {
  .article-layout { gap: 2.5rem; }
  .guide-layout, .guide-layout--deep { gap: 2rem; }
}

@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .article-hero { height: 260px; }
  .guide-layout,
  .guide-layout--deep { grid-template-columns: 1fr; }
  .guide-toc { display: none; }
}

/* ── Article header ────────────────────────────────────────────────────────── */

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-signature);
  margin-bottom: 1rem;
}

.article-category::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  flex-shrink: 0;
}

.article-title {
  font-family: var(--font-heading);
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.article-excerpt {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
  max-width: 66ch;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0;
  border-bottom: none;
}

.article-meta time {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.article-meta__reading-time::before {
  content: '·';
  margin-right: 0.75rem;
  opacity: 0.4;
}

.article-tags {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.article-tag {
  padding: 0.1875rem 0.625rem;
  background: var(--color-signature-5);
  border: 1px solid var(--color-signature-15);
  border-radius: 4px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-signature);
  text-transform: uppercase;
}

.article-updated {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-light);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Article date shown in guide template */
.article-date {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

/* ── Article body typography ───────────────────────────────────────────────── */

.article-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.5625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin: 3rem 0 1.125rem;
  color: var(--color-text);
  padding-top: 0.5rem;
}

/* Orange accent bar before each H2 (overridden per template below) */
.article-body h2::before {
  content: '';
  display: block;
  width: 28px;
  height: 3px;
  background: var(--color-signature);
  margin-bottom: 0.875rem;
  border-radius: 2px;
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin: 2.25rem 0 0.75rem;
  color: var(--color-text);
}

.article-body h4 {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 1.75rem 0 0.625rem;
  color: var(--color-text-secondary);
}

.article-body p { margin-bottom: 1.375rem; }

.article-body strong {
  font-weight: 700;
  color: var(--color-text);
}

/* ── Lists ─────────────────────────────────────────────────────────────────── */

.article-body ul,
.article-body ol {
  margin: 0 0 1.375rem 0;
  padding: 0;
  list-style: none;
}

.article-body li {
  padding-left: 1.5rem;
  margin-bottom: 0.625rem;
  position: relative;
}

.article-body ul li::before {
  content: '';
  position: absolute;
  left: 0.25rem;
  top: 0.65em;
  width: 5px;
  height: 5px;
  background: var(--color-signature);
  border-radius: 50%;
  flex-shrink: 0;
}

.article-body ol { counter-reset: ol-counter; }
.article-body ol li { counter-increment: ol-counter; }
.article-body ol li::before {
  content: counter(ol-counter) '.';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-signature);
  line-height: 1.8;
}

/* ── Blockquote ────────────────────────────────────────────────────────────── */

.article-body blockquote {
  border-left: 3px solid var(--color-signature);
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--color-bg-alt);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

/* ── Code ──────────────────────────────────────────────────────────────────── */

.article-body code {
  background: var(--color-bg-alt);
  padding: 0.125em 0.4em;
  border-radius: 4px;
  font-size: 0.875em;
  font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
  color: var(--color-signature);
  border: 1px solid var(--color-border-light);
}

.article-body pre {
  background: var(--color-charcoal-dark);
  color: #e8e0d8;
  padding: 1.5rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 2rem 0;
  font-size: 0.875rem;
  line-height: 1.65;
}

[data-theme="dark"] .article-body pre {
  background: #0e0c0a;
}

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

.article-body a {
  color: var(--color-signature);
  text-decoration-line: underline;
  text-decoration-color: var(--color-signature-20);
  text-underline-offset: 2px;
  transition: text-decoration-color 150ms ease;
}

.article-body a:hover {
  text-decoration-color: var(--color-signature);
}

/* CTA buttons inside article body override the a { color } rule */
.article-body .btn-article-cta,
.article-body .btn-article-cta:hover {
  color: #fff;
  text-decoration: none;
}

.article-body .btn-article-cta-secondary { color: var(--color-text-secondary); text-decoration: none; }
.article-body .btn-article-cta-secondary:hover { color: var(--color-text); text-decoration: none; }
[data-theme="dark"] .article-body .btn-article-cta-secondary { color: var(--color-warm-taupe); }
[data-theme="dark"] .article-body .btn-article-cta-secondary:hover { color: var(--color-champagne); }

/* ── Tables ────────────────────────────────────────────────────────────────── */

.article-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  font-size: 0.9375rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.article-body th {
  background: var(--color-charcoal);
  color: #e8e0d8;
  padding: 0.75rem 1.125rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-family: var(--font-heading);
}

[data-theme="dark"] .article-body th {
  background: #0e0c0a;
  color: var(--color-text-muted);
}

.article-body td {
  padding: 0.75rem 1.125rem;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  vertical-align: top;
  line-height: 1.55;
}

.article-body tbody tr:nth-child(even) td {
  background: var(--color-bg-alt);
}

.article-body tr:last-child td { border-bottom: none; }

/* ── Shortcode elements ────────────────────────────────────────────────────── */

figure.article-image,
figure.article-video {
  margin: 2.5rem 0;
}

figure.article-image img {
  width: 100%;
  border-radius: 10px;
  display: block;
}

figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 0.5rem;
  font-style: italic;
}

figure.article-image--lightbox {
  position: relative;
  cursor: zoom-in;
}

figure.article-image--lightbox .lightbox-hint {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 30px;
  height: 30px;
  background: var(--color-black-50);
  backdrop-filter: blur(4px);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 300;
}

.article-video__wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 10px;
}

.article-video__wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ── Callout blocks ────────────────────────────────────────────────────────── */

.article-callout {
  display: flex;
  gap: 0.875rem;
  padding: 1.125rem 1.375rem;
  border-radius: 8px;
  margin: 1.75rem 0;
  align-items: flex-start;
}

.article-callout--tip {
  background: rgba(22, 163, 74, 0.06);
  border-left: 3px solid #16a34a;
}

.article-callout--info {
  background: var(--color-signature-5);
  border-left: 3px solid var(--color-signature);
}

.article-callout--warning {
  background: rgba(202, 138, 4, 0.06);
  border-left: 3px solid #ca8a04;
}

[data-theme="dark"] .article-callout--tip    { background: rgba(22, 163, 74, 0.08); }
[data-theme="dark"] .article-callout--info   { background: rgba(232, 97, 26, 0.08); }
[data-theme="dark"] .article-callout--warning { background: rgba(202, 138, 4, 0.08); }

.article-callout__icon {
  flex-shrink: 0;
  flex-grow: 0;
  width: 20px;
  min-width: 20px;
  height: 20px;
  margin-top: 1px;
  overflow: hidden;
}

.article-callout__icon svg { width: 20px; height: 20px; display: block; }
.article-callout--tip     .article-callout__icon { color: #16a34a; }
.article-callout--info    .article-callout__icon { color: var(--color-signature); }
.article-callout--warning .article-callout__icon { color: #ca8a04; }

.article-callout__body { flex: 1; min-width: 0; }

.article-callout__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

.article-callout__title {
  display: block;
  font-weight: 700;
  font-size: 0.875rem;
  margin-bottom: 0.3rem;
  color: var(--color-text);
}

.article-callout--tip    .article-callout__title { color: #14532d; }
.article-callout--warning .article-callout__title { color: #7c2d12; }

[data-theme="dark"] .article-callout--tip    .article-callout__title { color: #4ade80; }
[data-theme="dark"] .article-callout--info   .article-callout__title { color: var(--color-signature-light); }
[data-theme="dark"] .article-callout--warning .article-callout__title { color: #facc15; }

/* ── Inline CTA ────────────────────────────────────────────────────────────── */
/*
 * "Architectural Aside" — warm elevated card with opposing corner bracket marks.
 * Light mode: cream surface, charcoal text. Dark mode: raised surface, champagne text.
 * Left-aligned layout reads as editorial rather than banner.
 */

.article-cta-inline {
  margin: 3rem 0;
  padding: 2.5rem 2.75rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* Top-left bracket — signature orange L-mark */
.article-cta-inline::before {
  content: '';
  position: absolute;
  top: 1.125rem;
  left: 1.125rem;
  width: 1.375rem;
  height: 1.375rem;
  border-top: 2px solid var(--color-signature);
  border-left: 2px solid var(--color-signature);
  pointer-events: none;
}

/* Bottom-right bracket — mirrored */
.article-cta-inline::after {
  content: '';
  position: absolute;
  bottom: 1.125rem;
  right: 1.125rem;
  width: 1.375rem;
  height: 1.375rem;
  border-bottom: 2px solid var(--color-signature);
  border-right: 2px solid var(--color-signature);
  pointer-events: none;
}

[data-theme="dark"] .article-cta-inline {
  background: var(--color-surface);
  background-image: radial-gradient(ellipse at top right, rgba(232, 97, 26, 0.07) 0%, transparent 55%);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xl);
}

/* Content wrapper */
.article-cta-content { position: relative; z-index: 1; text-align: center; }

/* Eyebrow — small inline label with leading rule */
.article-cta-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.625rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-signature);
  margin-bottom: 0.75rem !important;
}

.article-cta-eyebrow::before {
  content: '';
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  flex-shrink: 0;
}

/* CTA title — charcoal in light mode, near-white in dark */
.article-cta-title {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 0.875rem !important;
  margin-top: 0.7em !important;
}

[data-theme="dark"] .article-cta-title { color: var(--color-text-on-dark); }

/* CTA description */
.article-cta-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 1.75rem;
  max-width: 52ch;
  margin-inline: auto;
}

/* Button row — centered, wraps gracefully */
.article-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Primary CTA button */
.btn-article-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.8125rem 1.875rem;
  background: var(--color-signature);
  color: #fff;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-article-cta:hover {
  background: var(--color-signature-hover);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(232, 97, 26, 0.28);
}

/* Secondary CTA button — adapts to light/dark surface */
.btn-article-cta-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.8125rem 1.625rem;
  background: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-article-cta-secondary:hover {
  background: var(--color-charcoal-5);
  color: var(--color-text);
  border-color: var(--color-charcoal-20);
  text-decoration: none;
}

[data-theme="dark"] .btn-article-cta-secondary {
  color: var(--color-warm-taupe);
  border-color: var(--color-border);
}

[data-theme="dark"] .btn-article-cta-secondary:hover {
  background: var(--color-white-10);
  color: var(--color-champagne);
  border-color: var(--color-white-20);
}

/* ── Gallery ───────────────────────────────────────────────────────────────── */

.article-gallery { margin: 2.5rem 0; }

.article-gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.article-gallery__item { display: block; overflow: hidden; border-radius: 8px; }
.article-gallery__item img { width: 100%; height: 180px; object-fit: cover; display: block; transition: transform 0.35s ease; }
.article-gallery__item:hover img { transform: scale(1.06); }

/* ── Carousel ──────────────────────────────────────────────────────────────── */

.article-carousel { margin: 2.5rem 0; }
.article-carousel .swiper-slide img { width: 100%; border-radius: 10px; display: block; }
.article-carousel figcaption { text-align: center; color: var(--color-text-muted); font-size: 0.875rem; margin-top: 0.5rem; }

/* ── Sidebar CTA (standard template) ──────────────────────────────────────── */

.article-sidebar__cta {
  background: var(--color-charcoal);
  color: var(--color-text-on-dark);
  padding: 1.875rem 1.5rem;
  border-radius: 16px;
  position: sticky;
  top: 2rem;
}

[data-theme="dark"] .article-sidebar__cta {
  background: #111009;
  border: 1px solid var(--color-border);
}

.article-sidebar__cta h3 {
  color: var(--color-text-on-dark);
  font-size: 1rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.article-sidebar__cta p {
  color: var(--color-warm-taupe);
  font-size: 0.9rem;
  margin-bottom: 1.375rem;
  line-height: 1.65;
}

.btn-cta-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1rem;
  background: var(--color-signature);
  color: #fff;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  text-align: center;
  margin-bottom: 0.625rem;
  text-decoration: none;
  transition: background 150ms ease;
}

.btn-cta-sidebar:hover { background: var(--color-signature-hover); color: #fff; text-decoration: none; }

.btn-cta-sidebar-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1rem;
  background: var(--color-white-10);
  color: var(--color-warm-taupe);
  border-radius: 8px;
  font-size: 0.875rem;
  text-align: center;
  text-decoration: none;
  transition: background 150ms ease;
  border: 1px solid var(--color-white-20);
}

.btn-cta-sidebar-secondary:hover { background: var(--color-white-20); color: var(--color-champagne); text-decoration: none; }

/* ── TOC Sidebar ───────────────────────────────────────────────────────────── */

.guide-toc {
  position: sticky;
  top: calc(var(--nav-height) + 4.25rem);
  align-self: start;
  max-height: calc(100vh - var(--nav-height) - 6rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.guide-toc__inner {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
}

.guide-toc__title {
  font-size: 0.625rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  margin-bottom: 0.875rem;
  padding-bottom: 0.625rem;
  border-bottom: 2px solid var(--color-signature);
  font-family: var(--font-heading);
}

.guide-toc__list { list-style: none; margin: 0; padding: 0; }
.guide-toc__item { margin-bottom: 0; }

.guide-toc__link {
  display: flex;
  align-items: baseline;
  gap: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.4375rem 0.625rem;
  line-height: 1.35;
  transition: color 200ms ease, background 200ms ease;
  position: relative;
  border-radius: 6px;
  border-left: 2px solid transparent;
  margin-left: -2px;
}

.guide-toc__link:hover {
  color: var(--color-text-secondary);
  background: var(--color-signature-5);
  text-decoration: none;
}

.guide-toc__link.is-active {
  color: var(--color-signature);
  font-weight: 600;
  background: var(--color-signature-5);
  border-left-color: var(--color-signature);
  border-radius: 0 6px 6px 0;
}

/* H3 items: indented, smaller, collapsible */
.guide-toc__item--h3 {
  padding-left: 0.75rem;
  overflow: hidden;
  max-height: 4rem;
  opacity: 1;
  transition: max-height 280ms ease, opacity 200ms ease, margin-bottom 200ms ease;
}
.guide-toc__item--h3 .guide-toc__link {
  font-size: 0.75rem;
  padding: 0.3125rem 0.5rem;
}
.guide-toc__item--h3 .guide-toc__link.is-active { color: var(--color-signature); }

/* Hidden state — JS adds/removes this class */
.guide-toc__item--h3.toc-h3-hidden {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  margin-bottom: 0;
}

/* Guide template: numbered step circles */
.guide-toc__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  min-width: 18px;
  background: var(--color-signature);
  color: #fff;
  border-radius: 50%;
  font-size: 0.5625rem;
  font-weight: 700;
  margin-right: 0.5rem;
  flex-shrink: 0;
  position: relative;
  top: 1px;
  transition: background 200ms ease, box-shadow 200ms ease;
}

/* Active step: glow ring */
.guide-toc__link.is-active .guide-toc__num {
  box-shadow: 0 0 0 3px var(--color-signature-15);
}

/* Inactive steps: muted circle */
.guide-toc__link:not(.is-active) .guide-toc__num {
  background: var(--color-text-muted);
  opacity: 0.4;
}
.guide-toc__link:hover .guide-toc__num {
  opacity: 0.7;
}

.guide-toc__meta {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border-light);
  letter-spacing: 0.02em;
}

/* ── Mobile TOC (details/summary toggle) ──────────────────────────────────── */

.mobile-toc {
  display: none;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 2rem;
}

.mobile-toc summary {
  list-style: none;
  padding: 0.875rem 1.125rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  user-select: none;
  transition: background 150ms ease;
}

.mobile-toc summary:hover { background: var(--color-surface-hover); }
.mobile-toc summary::-webkit-details-marker { display: none; }

.mobile-toc summary .mobile-toc__icon {
  color: var(--color-signature);
  flex-shrink: 0;
}

.mobile-toc summary::after {
  content: '';
  margin-left: auto;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--color-text-muted);
  transition: transform 200ms ease;
  flex-shrink: 0;
}

.mobile-toc[open] summary::after { transform: rotate(180deg); }

.mobile-toc nav {
  padding: 0.875rem 1.125rem 1.125rem;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.mobile-toc .guide-toc__link { font-size: 0.875rem; padding: 0.375rem 0; }
.mobile-toc .guide-toc__item--h3 .guide-toc__link { font-size: 0.8125rem; }
.mobile-toc .guide-toc__link.is-active::before { display: none; }

@media (max-width: 900px) {
  .mobile-toc { display: block; }
}

/* ── Guide body step styling ───────────────────────────────────────────────── */

.guide-body { counter-reset: guide-step; }
.guide-body h2 { counter-increment: guide-step; }

/* Guide H2: flex layout so text wraps cleanly beside the step circle */
.article-body.guide-body h2 {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

/* Guide: replace orange bar with numbered counter circle */
.article-body.guide-body h2::before {
  content: counter(guide-step, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  min-width: 34px;
  background: var(--color-signature);
  color: #fff;
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
  transform: translateY(-0.06em);
}

/* ── Listicle cards ────────────────────────────────────────────────────────── */

.listicle-card {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border-light);
}

.listicle-card:first-child { padding-top: 0; }

.listicle-card__num {
  flex-shrink: 0;
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--color-border);
  line-height: 1;
  min-width: 3rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-heading);
}

.listicle-card__inner { flex: 1; }
.listicle-card__inner h2 { font-size: 1.25rem; margin-top: 0; }
/* No bar in listicle cards */
.listicle-card__inner h2::before { display: none; content: none; }

/* ── Deep-dive specifics ───────────────────────────────────────────────────── */

/* nav (5rem) + breadcrumb bar (~2.75rem) + comfortable buffer */
.deep-dive-content .article-body h2 { scroll-margin-top: calc(var(--nav-height) + 4rem); }
.deep-dive-content .article-body h3 { scroll-margin-top: calc(var(--nav-height) + 4rem); }
.guide-body h2 { scroll-margin-top: calc(var(--nav-height) + 4rem); }

/* ==========================================================================
   NEW & UPDATED SHORTCODE STYLES
   ========================================================================== */

/* ── hd-image: align + size modifiers ─────────────────────────────────────── */

figure.article-image--left  { float: left;  margin: 0.25rem 1.75rem 1rem 0; }
figure.article-image--right { float: right; margin: 0.25rem 0 1rem 1.75rem; }
figure.article-image--sm  { max-width: 300px; }
figure.article-image--md  { max-width: 500px; }
figure.article-image--lg  { max-width: 700px; }
figure.article-image--full { max-width: 100%; }
/* Clearfix for floated images */
.article-body::after { content: ''; display: table; clear: both; }

@media (max-width: 600px) {
  figure.article-image--left,
  figure.article-image--right { float: none; margin: 1.5rem 0; max-width: 100%; }
}

/* ── hd-gallery: per-image captions ───────────────────────────────────────── */

.article-gallery__item-wrap { display: flex; flex-direction: column; }
.article-gallery__item-wrap figcaption {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 0.375rem;
  font-style: italic;
  padding: 0 0.25rem;
}

/* ── hd-callout: success type ─────────────────────────────────────────────── */

.article-callout--success {
  background: rgba(22, 163, 74, 0.06);
  border-left: 3px solid #16a34a;
}
[data-theme="dark"] .article-callout--success { background: rgba(22, 163, 74, 0.08); }
.article-callout--success .article-callout__icon { color: #16a34a; }
.article-callout--success .article-callout__title { color: #14532d; }
[data-theme="dark"] .article-callout--success .article-callout__title { color: #4ade80; }

/* ── hd-callout: collapsible variant ──────────────────────────────────────── */

details.article-callout--collapsible {
  display: block;
  padding: 0;
}
details.article-callout--collapsible > summary.article-callout__summary {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1rem 1.375rem;
  cursor: pointer;
  list-style: none;
  border-radius: 8px;
  transition: background 150ms ease;
}
details.article-callout--collapsible > summary.article-callout__summary::-webkit-details-marker { display: none; }
details.article-callout--collapsible[open] > summary.article-callout__summary {
  border-radius: 8px 8px 0 0;
}
details.article-callout--collapsible > .article-callout__body {
  padding: 0 1.375rem 1.125rem calc(1.375rem + 20px + 0.875rem);
}

/* Icon override (emoji/text) */
.article-callout__icon--override {
  flex-shrink: 0;
  font-size: 1.25rem;
  line-height: 1;
  margin-top: 1px;
}

/* ── hd-cta: minimal variant ──────────────────────────────────────────────── */

.article-cta-inline--minimal {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  box-shadow: none;
}
.article-cta-inline--minimal::before,
.article-cta-inline--minimal::after { display: none; }
[data-theme="dark"] .article-cta-inline--minimal {
  background: var(--color-surface);
  border-color: var(--color-border);
  background-image: none;
  box-shadow: none;
}

/* ── hd-cta: left align ───────────────────────────────────────────────────── */
.article-cta-inline--left .article-cta-content { text-align: left; }
.article-cta-inline--left .article-cta-desc { margin-inline: 0; }
.article-cta-inline--left .article-cta-actions { justify-content: flex-start; }

/* ── hd-before-after ──────────────────────────────────────────────────────── */

.article-before-after {
  margin: 2.5rem 0;
}

.article-before-after__slider-wrap {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
}

.article-before-after__slider {
  display: block;
  width: 100%;
  --divider-color: var(--color-signature);
  --divider-width: 3px;
  --handle-opacity: 0.9;
  --handle-opacity-active: 1;
  --default-handle-color: var(--color-signature);
  --default-handle-width: clamp(40px, 6vw, 60px);
}

.article-before-after__slider img {
  width: 100%;
  display: block;
  height: auto;
}

.article-before-after__labels {
  position: absolute;
  bottom: 0.75rem;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 0.875rem;
  pointer-events: none;
}

.article-before-after__label {
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
}

/* ── hd-cost-range ────────────────────────────────────────────────────────── */

.article-cost-range {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 2.5rem 0;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.article-cost-range__tier {
  background: var(--color-surface);
  padding: 1.5rem 1.375rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

[data-theme="dark"] .article-cost-range__tier { background: var(--color-bg-alt); }

.article-cost-range__tier--premium {
  background: var(--color-signature-5);
  border-left: none;
}
[data-theme="dark"] .article-cost-range__tier--premium { background: rgba(232, 97, 26, 0.08); }

.article-cost-range__label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
}

.article-cost-range__tier--premium .article-cost-range__label {
  color: var(--color-signature);
}

.article-cost-range__price {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.article-cost-range__tier--premium .article-cost-range__price {
  color: var(--color-signature);
}

.article-cost-range__desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin: 0;
}

@media (max-width: 640px) {
  .article-cost-range { grid-template-columns: 1fr; }
  .article-cost-range__tier { border-bottom: 1px solid var(--color-border-light); }
  .article-cost-range__tier:last-child { border-bottom: none; }
}

/* ── hd-pros-cons ─────────────────────────────────────────────────────────── */

.article-pros-cons {
  margin: 2.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

.article-pros-cons__title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 1rem 1.375rem 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
  margin: 0;
}

.article-pros-cons__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.article-pros-cons__col {
  padding: 1.375rem;
}

.article-pros-cons__col--pros {
  border-right: 1px solid var(--color-border-light);
}

.article-pros-cons__col-label {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 0.875rem;
  font-family: var(--font-heading);
}

.article-pros-cons__col--pros .article-pros-cons__col-label { color: #16a34a; }
.article-pros-cons__col--cons .article-pros-cons__col-label { color: #dc2626; }

.article-pros-cons__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.article-pros-cons__col li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  margin-bottom: 0.625rem;
  padding: 0;
}

.article-pros-cons__col li::before { display: none; }

.article-pros-cons__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-top: 0.1em;
}

.article-pros-cons__icon--pro {
  background: rgba(22, 163, 74, 0.1);
  color: #16a34a;
}

.article-pros-cons__icon--con {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
}

@media (max-width: 540px) {
  .article-pros-cons__grid { grid-template-columns: 1fr; }
  .article-pros-cons__col--pros { border-right: none; border-bottom: 1px solid var(--color-border-light); }
}

/* ── hd-pull-quote ────────────────────────────────────────────────────────── */

.article-pull-quote {
  position: relative;
  margin: 3rem auto;
  max-width: 63ch;
  text-align: center;
  padding: 2rem 1.5rem;
  border: none;
  background: transparent;
  border-radius: 0;
}

.article-pull-quote::before {
  content: '\201C';
  position: absolute;
  top: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 6rem;
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-signature-15);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.article-pull-quote__text {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 3vw, 1.625rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  position: relative;
  z-index: 1;
}

/* Decorative accent bar above and below */
.article-pull-quote::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-signature);
  border-radius: 2px;
  margin: 0 auto;
}

.article-pull-quote__attribution {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: normal;
  margin-top: 0.75rem;
}

.article-pull-quote__attribution cite { font-style: italic; }

/* ── hd-faq ───────────────────────────────────────────────────────────────── */

.article-faq {
  margin: 2.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

.article-faq__title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  padding: 1rem 1.375rem 0.75rem;
  border-bottom: 1px solid var(--color-border-light);
  margin: 0;
}

.article-faq__item {
  border-bottom: 1px solid var(--color-border-light);
}

.article-faq__item:last-child { border-bottom: none; }

.article-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.125rem 1.375rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: background 150ms ease, color 150ms ease;
  line-height: 1.45;
}

.article-faq__question::-webkit-details-marker { display: none; }

.article-faq__question::after {
  content: '';
  flex-shrink: 0;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-text-muted);
  transition: transform 200ms ease;
}

.article-faq__item[open] > .article-faq__question {
  color: var(--color-signature);
}

.article-faq__item[open] > .article-faq__question::after {
  transform: rotate(180deg);
  border-top-color: var(--color-signature);
}

.article-faq__answer {
  padding: 0 1.375rem 1.125rem;
}

.article-faq__answer p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ── hd-timeline ──────────────────────────────────────────────────────────── */

.article-timeline {
  margin: 2.5rem 0;
  padding: 0;
}

.article-timeline__item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.article-timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  padding-top: 2px;
}

.article-timeline__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--color-signature);
  color: #fff;
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  font-family: var(--font-heading);
  flex-shrink: 0;
  z-index: 1;
}

.article-timeline__line {
  width: 2px;
  flex: 1;
  min-height: 2rem;
  background: var(--color-border);
  margin: 0.375rem 0;
  border-radius: 1px;
}

.article-timeline__content {
  padding-bottom: 1.75rem;
  flex: 1;
}

.article-timeline__item--last .article-timeline__content {
  padding-bottom: 0;
}

.article-timeline__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0.125rem 0 0.25rem;
  line-height: 1.35;
}

.article-timeline__time {
  font-size: 0.8125rem;
  color: var(--color-signature);
  font-weight: 600;
  margin: 0;
}

/* ── hd-comparison ────────────────────────────────────────────────────────── */

.article-comparison {
  margin: 2.5rem 0;
}

.article-comparison__title {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin: 0 0 0.75rem;
}

.article-comparison__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

/* Comparison table inherits article-body table styles; overrides below */
.article-comparison table {
  margin: 0;
  border-radius: 0;
  border: none;
  box-shadow: none;
  min-width: 480px;
}

.article-comparison__row-head {
  width: 160px;
  min-width: 120px;
  background: var(--color-charcoal);
}

.article-comparison__row-label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
}

[data-theme="dark"] .article-comparison__row-label { background: var(--color-surface); }

/* ── hd-related ───────────────────────────────────────────────────────────── */

.article-related {
  margin: 3rem 0;
  padding: 1.75rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: 12px;
}

.article-related__title {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  font-family: var(--font-heading);
}

.article-related__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.625rem;
}

.article-related__card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.875rem 1.125rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.article-related__card:hover {
  border-color: var(--color-signature);
  box-shadow: 0 4px 16px rgba(232, 97, 26, 0.12);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--color-text);
}

.article-related__card-text { flex: 1; }

.article-related__card-arrow {
  color: var(--color-signature);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  transition: transform 150ms ease;
}

.article-related__card:hover .article-related__card-arrow { transform: translateX(3px); }

/* ── Client Story shortcode ───────────────────────────────────────────────── */

.article-client-story {
  margin: 2.5rem 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
}

.article-client-story__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
  padding: 1rem 1.5rem;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
}

.article-client-story__quote-icon {
  width: 24px;
  height: 24px;
  color: var(--color-signature);
  flex-shrink: 0;
}

.article-client-story__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-text);
}

.article-client-story__location {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.article-client-story__location::before {
  content: '·';
  margin-right: 0.625rem;
}

.article-client-story__service {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-signature);
  background: var(--color-signature-5);
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
}

.article-client-story__sections {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.article-client-story__section {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 1rem;
}

.article-client-story__step {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.article-client-story__step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-signature);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.article-client-story__step-line {
  width: 2px;
  flex: 1;
  background: var(--color-border);
  margin-top: 0.375rem;
}

.article-client-story__section-body {
  padding-bottom: 1.5rem;
}

.article-client-story__section:last-child .article-client-story__section-body {
  padding-bottom: 0;
}

.article-client-story__section-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-signature);
  margin: 0 0 0.375rem;
  line-height: 1.4;
}

.article-client-story__section-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
}

@media (max-width: 600px) {
  .article-client-story__header {
    padding: 0.875rem 1rem;
  }
  .article-client-story__service {
    margin-left: 0;
  }
  .article-client-story__sections {
    padding: 1.25rem 1rem;
  }
}