.et-column-article {
  --et-column-primary: #140094;
  --et-column-primary-dark: #0d0068;
  --et-column-primary-soft: #f3f0ff;
  --et-column-accent: #5c47ea;
  --et-column-accent-soft: #ebe6ff;
  --et-column-highlight: #fff5e8;
  --et-column-text: #1f2430;
  --et-column-subtext: #5f6675;
  --et-column-border: #ddd7f5;
  --et-column-bg: #ffffff;
  --et-column-bg-soft: #faf9ff;
  --et-column-shadow: 0 18px 44px rgba(20, 0, 148, 0.08);
  --et-column-radius-lg: 24px;
  --et-column-radius-md: 16px;
  --et-column-radius-sm: 12px;
  --et-column-max-width: 960px;

  max-width: var(--et-column-max-width);
  margin: 0 auto;
  padding: 24px 20px 72px;
  color: var(--et-column-text);
  line-height: 1.9;
  font-size: 16px;
  background: var(--et-column-bg);
  box-sizing: border-box;
}

.et-column-article *,
.et-column-article *::before,
.et-column-article *::after {
  box-sizing: border-box;
}

.et-column-article img {
  max-width: 100%;
  height: auto;
}

.et-column-article a {
  word-break: break-word;
}

/* ========================================
   Header
======================================== */

.et-column-article .et-column-header {
  position: relative !important;
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 0 28px 0 !important;
  padding: 32px 28px !important;
  border: 1px solid var(--et-column-border) !important;
  border-radius: var(--et-column-radius-lg) !important;
  background: linear-gradient(135deg, rgba(20, 0, 148, 0.98) 0%, rgba(53, 31, 189, 0.96) 100%) !important;
  color: #ffffff !important;
  box-shadow: var(--et-column-shadow) !important;
  text-align: left !important;
  float: none !important;
  clear: both !important;
  overflow: hidden !important;
  isolation: isolate !important;
  right: auto !important;
  left: auto !important;
  top: auto !important;
  bottom: auto !important;
  transform: none !important;
}

.et-column-article .et-column-header .et-column-eyebrow,
.et-column-article .et-column-header .et-column-title,
.et-column-article .et-column-header .et-column-lead,
.et-column-article .et-column-header .et-column-disclaimer {
  position: static !important;
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  float: none !important;
  clear: both !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
  text-align: left !important;
  right: auto !important;
  left: auto !important;
  top: auto !important;
  bottom: auto !important;
  transform: none !important;
}

.et-column-article .et-column-eyebrow {
  display: inline-flex !important;
  align-items: center !important;
  width: auto !important;
  max-width: 100% !important;
  margin: 0 0 14px 0 !important;
  padding: 6px 12px !important;
  border-radius: 999px !important;
  background: rgba(255, 255, 255, 0.14) !important;
  color: #ffffff !important;
  font-size: 12px !important;
  font-weight: 700 !important;
  letter-spacing: 0.08em !important;
  line-height: 1.4 !important;
}

.et-column-article .et-column-title {
  margin: 0 0 18px 0 !important;
  padding: 0 !important;
  color: #ffffff !important;
  font-size: 32px !important;
  font-weight: 700 !important;
  line-height: 1.4 !important;
  letter-spacing: 0.01em !important;
  word-break: break-word !important;
}

.et-column-article .et-column-lead {
  margin: 0 0 14px 0 !important;
  padding: 0 !important;
  color: rgba(255, 255, 255, 0.94) !important;
  font-size: 16px !important;
  line-height: 1.95 !important;
}

.et-column-article .et-column-disclaimer {
  margin: 0 !important;
  padding: 0 !important;
  color: rgba(255, 255, 255, 0.82) !important;
  font-size: 13px !important;
  line-height: 1.7 !important;
}

/* ========================================
   Common Section Box
======================================== */

.et-column-summary,
.et-column-toc,
.et-column-content-section,
.et-column-faq,
.et-column-references {
  margin-top: 28px;
  padding: 28px;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-lg);
  background: var(--et-column-bg);
  box-shadow: 0 10px 24px rgba(20, 0, 148, 0.04);
}

.et-column-summary {
  background: linear-gradient(180deg, #ffffff 0%, var(--et-column-bg-soft) 100%);
}

.et-column-section-head {
  margin-bottom: 10px;
}

.et-column-section-label {
  display: inline-block;
  margin-bottom: 2px;
  color: var(--et-column-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.et-column-section-title {
  margin: 0;
  padding-left: 14px;
  border-left: 5px solid var(--et-column-primary);
  color: var(--et-column-primary-dark);
  font-size: 24px;
  line-height: 1.45;
}

/* ========================================
   Text
======================================== */

.et-column-summary-card {
  padding: 24px;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-md);
  background: #ffffff;
}

.et-column-summary-card p,
.et-column-content-section p,
.et-column-faq-answer p,
.et-column-note-box p,
.et-column-warning-box p {
  margin: 0 0 16px;
}

.et-column-summary-card p:last-child,
.et-column-content-section p:last-child,
.et-column-faq-answer p:last-child,
.et-column-note-box p:last-child,
.et-column-warning-box p:last-child {
  margin-bottom: 0;
}

.et-column-content-section h3 {
  margin: 22px 0 10px;
  color: var(--et-column-primary-dark);
  font-size: 20px;
  line-height: 1.5;
}

/* ========================================
   Summary List
======================================== */

.et-column-check-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.et-column-check-list li {
  position: relative;
  margin: 0 0 12px;
  padding-left: 28px;
}

.et-column-check-list li:last-child {
  margin-bottom: 0;
}

.et-column-check-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--et-column-primary);
  box-shadow: 0 0 0 5px rgba(20, 0, 148, 0.08);
}

/* ========================================
   TOC
======================================== */

.et-column-toc {
  background: var(--et-column-primary-soft);
}

.et-column-toc-list {
  margin: 0;
  padding-left: 20px;
}

.et-column-toc-list li {
  margin-bottom: 10px;
}

.et-column-toc-list li:last-child {
  margin-bottom: 0;
}

/* ========================================
   Links
======================================== */

.et-column-toc a,
.et-column-content-section a,
.et-column-faq a,
.et-column-references a {
  color: var(--et-column-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 0, 148, 0.2);
  transition: 0.2s ease;
}

.et-column-toc a:hover,
.et-column-content-section a:hover,
.et-column-faq a:hover,
.et-column-references a:hover {
  color: var(--et-column-accent);
  border-bottom-color: rgba(92, 71, 234, 0.45);
}

/* ========================================
   Table
======================================== */

.et-column-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-md);
}

.et-column-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: #ffffff;
}

.et-column-table th,
.et-column-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--et-column-border);
  text-align: left;
  vertical-align: top;
}

.et-column-table thead th {
  background: var(--et-column-primary);
  color: #000000;
  font-weight: 700;
}

.et-column-table tbody tr:last-child td {
  border-bottom: none;
}

/* ========================================
   Cards
======================================== */

.et-column-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.et-column-card {
  padding: 20px;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-md);
  background: linear-gradient(180deg, #ffffff 0%, var(--et-column-bg-soft) 100%);
}

.et-column-card h3 {
  margin: 0 0 10px;
  color: var(--et-column-primary-dark);
  font-size: 18px;
  line-height: 1.5;
}

.et-column-card p {
  margin: 0;
  color: var(--et-column-subtext);
}

/* ========================================
   Note / Warning Box
======================================== */

.et-column-note-box,
.et-column-warning-box {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: var(--et-column-radius-md);
}

.et-column-note-box {
  border: 1px solid var(--et-column-border);
  background: var(--et-column-primary-soft);
}

.et-column-warning-box {
  border: 1px solid #f2dcc0;
  background: var(--et-column-highlight);
}

.et-column-note-title {
  margin: 0 0 8px;
  color: var(--et-column-primary-dark);
  font-weight: 700;
}

/* ========================================
   Related Links
======================================== */

.et-column-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.et-column-link-card {
  display: block;
  padding: 18px 18px 16px;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-md);
  background: #ffffff;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(20, 0, 148, 0.04);
}

.et-column-link-kicker {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--et-column-accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.et-column-link-card strong {
  display: block;
  color: var(--et-column-primary-dark);
  line-height: 1.6;
}

/* ========================================
   FAQ
======================================== */

.et-column-faq-item {
  margin-bottom: 14px;
  border: 1px solid var(--et-column-border);
  border-radius: var(--et-column-radius-md);
  background: #ffffff;
  overflow: hidden;
}

.et-column-faq-item:last-child {
  margin-bottom: 0;
}

.et-column-faq-item summary {
  position: relative;
  padding: 18px 48px 18px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--et-column-primary-dark);
}

.et-column-faq-item summary::-webkit-details-marker {
  display: none;
}

.et-column-faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  color: var(--et-column-primary);
  font-size: 24px;
  line-height: 1;
}

.et-column-faq-item[open] summary::after {
  content: "−";
}

.et-column-faq-answer {
  padding: 0 18px 18px;
  color: var(--et-column-subtext);
}

/* ========================================
   References
======================================== */

.et-column-reference-list {
  margin: 0;
  padding-left: 20px;
}

.et-column-reference-list li {
  margin-bottom: 12px;
}

.et-column-reference-list li:last-child {
  margin-bottom: 0;
}

/* ========================================
   Button
======================================== */

.et-column-bottom-link {
  margin-top: 28px;
  text-align: center;
}

.et-column-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 240px;
  padding: 16px 26px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--et-column-primary) 0%, var(--et-column-accent) 100%);
  color: #ffffff !important;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--et-column-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.et-column-button:hover,
.et-column-button:focus,
.et-column-button:visited {
  color: #ffffff !important;
}

/* ========================================
   Responsive
======================================== */

@media (max-width: 860px) {
  .et-column-article .et-column-title {
    font-size: 28px !important;
  }

  .et-column-card-grid,
  .et-column-link-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .et-column-article {
    padding: 16px 0px 56px;
    font-size: 15px;
  }

  .et-column-article .et-column-header {
    padding: 20px 18px !important;
    border-radius: 18px !important;
  }

  .et-column-summary,
  .et-column-toc,
  .et-column-content-section,
  .et-column-faq,
  .et-column-references {
    padding: 20px 18px;
    border-radius: 18px;
  }

  .et-column-article .et-column-title {
    font-size: 24px !important;
    line-height: 1.45 !important;
  }

  .et-column-article .et-column-lead {
    font-size: 15px !important;
    line-height: 1.85 !important;
  }

  .et-column-article .et-column-disclaimer {
    font-size: 12px !important;
  }

  .et-column-section-title {
    font-size: 20px;
    padding-left: 12px;
  }

  .et-column-summary-card {
    padding: 18px;
  }

  .et-column-faq-item summary {
    padding: 16px 44px 16px 16px;
  }

  .et-column-faq-answer {
    padding: 0 16px 16px;
  }

  .et-column-button {
    width: 100%;
    min-width: 0;
  }
}