/* ============================================================
   DIGITUM BLOG ARTICLE TEMPLATE V2
   High-end editorial layout:
   left outline / central reading column / right insight rail
   ============================================================ */

:root {
  --article-max: 760px;
  --rail-left: 220px;
  --rail-right: 285px;
}

/* Reading progress */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  width: 100%;
  height: 2px;
  pointer-events: none;
  background: transparent;
}

.read-progress-bar {
  width: 0;
  height: 100%;
  background: var(--lime);
  box-shadow: 0 0 15px rgba(203,252,4,.42);
}

/* Hero */
.blog-hero {
  position: relative;
  overflow: hidden;
  padding: 118px 0 62px;
}

.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 14%, rgba(203,252,4,.055), transparent 26%),
    linear-gradient(135deg, rgba(255,255,255,.012), transparent 42%);
  pointer-events: none;
}

.blog-hero::after {
  content: "";
  position: absolute;
  width: 560px;
  height: 820px;
  right: -210px;
  top: -360px;
  transform: rotate(31deg);
  background: linear-gradient(
    90deg,
    transparent,
    rgba(203,252,4,.015),
    rgba(203,252,4,.08),
    rgba(255,255,255,.022),
    transparent
  );
  pointer-events: none;
}

.blog-breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
  color: var(--muted-2);
  font-size: .72rem;
  font-weight: 700;
}

.blog-breadcrumb a { color: var(--muted); }
.blog-breadcrumb a:hover { color: var(--lime); }

.blog-hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .55fr);
  gap: 66px;
  align-items: end;
}

.blog-hero-copy .eyebrow {
  margin-bottom: 18px;
}

.blog-hero-copy h1 {
  max-width: 940px;
  font-size: clamp(2.55rem, 4.15vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.046em;
  text-wrap: balance;
}

.blog-hero-copy .lede {
  max-width: 760px;
  margin-top: 22px;
  color: #b7bbb3;
  font-size: 1.02rem;
  line-height: 1.76;
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 25px;
  color: var(--muted-2);
  font-size: .73rem;
}

.blog-meta strong {
  color: #e2e5df;
  font-weight: 700;
}

.meta-dot::before {
  content: "•";
  margin-right: 18px;
  color: rgba(203,252,4,.55);
}

.hero-brief {
  padding: 23px;
  border: 1px solid var(--line-lime);
  border-radius: 19px;
  background:
    linear-gradient(145deg, rgba(203,252,4,.045), transparent 52%),
    rgba(22,24,20,.82);
  backdrop-filter: blur(12px);
}

.hero-brief > span {
  color: var(--lime);
  font: 700 .62rem "Satoshi", sans-serif;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.hero-brief h3 {
  margin-top: 16px;
  font-size: 1.15rem;
  line-height: 1.2;
}

.hero-brief ul {
  display: grid;
  gap: 10px;
  margin-top: 15px;
  padding-left: 0;
  list-style: none;
}

.hero-brief li {
  position: relative;
  padding-left: 17px;
  color: #b9bdb5;
  font-size: .79rem;
  line-height: 1.52;
}

.hero-brief li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(203,252,4,.28);
}

/* Main 3-column article layout */
.article-shell {
  padding: 48px 0 86px;
}

.article-layout {
  display: grid;
  grid-template-columns: var(--rail-left) minmax(0, var(--article-max)) var(--rail-right);
  gap: 42px;
  align-items: start;
  justify-content: center;
}

/* Left outline */
.article-outline {
  position: sticky;
  top: 112px;
  padding-top: 6px;
}

.outline-card {
  padding: 17px 0;
}

.outline-card > span {
  display: block;
  color: var(--lime);
  font: 700 .61rem "Satoshi", sans-serif;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.outline-list {
  position: relative;
  display: grid;
  gap: 0;
  margin-top: 14px;
  padding-left: 13px;
}

.outline-list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: rgba(255,255,255,.09);
}

.outline-list a {
  position: relative;
  display: block;
  padding: 8px 0 8px 12px;
  color: var(--muted-2);
  font-size: .73rem;
  line-height: 1.42;
  transition: color .18s ease;
}

.outline-list a::before {
  content: "";
  position: absolute;
  left: -13px;
  top: 50%;
  width: 1px;
  height: 0;
  transform: translateY(-50%);
  background: var(--lime);
  transition: height .18s ease;
}

.outline-list a:hover,
.outline-list a.is-active {
  color: #e7ebe3;
}

.outline-list a.is-active::before {
  height: 22px;
}

.outline-meta {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.outline-meta small {
  display: block;
  color: var(--muted-2);
  font-size: .59rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.outline-meta strong {
  display: block;
  margin-top: 5px;
  color: #dfe3db;
  font-size: .74rem;
}

/* Central article */
.article-body {
  min-width: 0;
}

.article-body > * + * {
  margin-top: 20px;
}

.article-body h2 {
  margin-top: 64px;
  font-size: clamp(1.95rem, 2.75vw, 2.75rem);
  line-height: 1.09;
  letter-spacing: -.035em;
  scroll-margin-top: 120px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin-top: 38px;
  font-size: clamp(1.3rem, 1.9vw, 1.62rem);
  line-height: 1.15;
  letter-spacing: -.025em;
  scroll-margin-top: 120px;
}

.article-body p {
  color: #b9bcb5;
  font-size: 1rem;
  line-height: 1.84;
}

.article-body p + p {
  margin-top: 18px;
}

.article-body strong {
  color: #eef1eb;
}

.article-body a {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.article-body ul,
.article-body ol {
  display: grid;
  gap: 10px;
  padding-left: 1.25rem;
  color: #b9bcb5;
  font-size: .98rem;
  line-height: 1.72;
}

.article-body li::marker {
  color: var(--lime);
}

/* section number marker */
.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--lime);
  font: 700 .62rem "Satoshi", sans-serif;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--lime);
  opacity: .6;
}

.article-body blockquote {
  position: relative;
  margin: 34px 0;
  padding: 24px 26px 24px 28px;
  border-left: 2px solid var(--lime);
  background:
    linear-gradient(90deg, rgba(203,252,4,.035), transparent 78%);
  color: #e5e8e1;
  font-size: 1.06rem;
  line-height: 1.76;
}

/* Stronger editorial visual */
.article-visual {
  position: relative;
  overflow: hidden;
  margin: 34px 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.025), rgba(255,255,255,.008)),
    var(--surface);
}

.article-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
  pointer-events: none;
}

.visual-inner {
  position: relative;
  z-index: 2;
  min-height: 370px;
  display: grid;
  place-items: center;
  padding: 38px;
}

.visual-demo {
  width: min(100%, 560px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
  align-items: center;
}

.visual-step {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(0,0,0,.18);
}

.visual-step small {
  color: var(--muted-2);
  font-size: .57rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.visual-step strong {
  display: block;
  margin-top: 9px;
  color: #e6e9e3;
  font-size: .87rem;
}

.visual-step.highlight {
  border-color: var(--line-lime);
  background: rgba(203,252,4,.04);
}

.visual-step.highlight strong {
  color: var(--lime);
}

.visual-caption {
  position: relative;
  z-index: 2;
  padding: 13px 16px 15px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: .68rem;
  line-height: 1.5;
}

/* Key insight block */
.article-insight {
  margin: 34px 0;
  padding: 24px;
  border: 1px solid var(--line-lime);
  border-radius: 18px;
  background:
    linear-gradient(145deg, rgba(203,252,4,.045), transparent 55%),
    var(--surface);
}

.article-insight > span {
  color: var(--lime);
  font: 700 .62rem "Satoshi", sans-serif;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.article-insight h3 {
  margin-top: 16px;
  font-size: 1.35rem;
}

.article-insight p {
  margin-top: 8px;
  font-size: .9rem;
  line-height: 1.68;
}

/* Comparison table */
.article-table-wrap {
  margin: 32px 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.article-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

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

.article-table th {
  color: var(--lime);
  background: rgba(203,252,4,.022);
  font: 700 .68rem "Satoshi", sans-serif;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.article-table td {
  color: #b9bcb5;
  font-size: .84rem;
  line-height: 1.5;
}

.article-table tr:last-child td {
  border-bottom: 0;
}

/* Mid article CTA, deliberately restrained */
.article-inline-cta {
  margin: 44px 0;
  padding: 24px 25px;
  border: 1px solid rgba(203,252,4,.26);
  border-radius: 18px;
  background:
    linear-gradient(145deg, rgba(203,252,4,.028), transparent 55%),
    rgba(255,255,255,.012);
}

.article-inline-cta span {
  color: var(--lime);
  font: 700 .61rem "Satoshi", sans-serif;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.article-inline-cta h3 {
  margin-top: 14px;
  font-size: 1.3rem;
}

.article-inline-cta p {
  margin-top: 8px;
  color: var(--muted);
  font-size: .86rem;
}

.article-inline-cta .btn-row {
  margin-top: 17px;
}

/* Right rail */
.article-rail {
  position: sticky;
  top: 112px;
  padding-top: 6px;
}

.rail-stack {
  display: grid;
  gap: 12px;
}

.rail-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.02), transparent),
    rgba(255,255,255,.01);
}

.rail-card.featured {
  border-color: rgba(203,252,4,.28);
  background:
    linear-gradient(145deg, rgba(203,252,4,.04), transparent 55%),
    rgba(255,255,255,.012);
}

.rail-card > span {
  color: var(--muted-2);
  font: 700 .59rem "Satoshi", sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.rail-card.featured > span {
  color: var(--lime);
}

.rail-card h3 {
  margin-top: 12px;
  font-size: 1rem;
  line-height: 1.25;
}

.rail-card p {
  margin-top: 8px;
  color: var(--muted-2);
  font-size: .72rem;
  line-height: 1.55;
}

.rail-card a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 12px;
  color: var(--lime);
  font: 700 .71rem "Satoshi", sans-serif;
}

.rail-list {
  display: grid;
  margin-top: 12px;
}

.rail-list a {
  display: block;
  margin: 0;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: #d6dad2;
  font-size: .76rem;
  line-height: 1.42;
}

.rail-list a:last-child {
  border-bottom: 0;
}

/* Article ending */
.article-end {
  padding: 0 0 78px;
}

.article-end-inner {
  max-width: 760px;
  margin-inline: auto;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.article-end-top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
}

.article-end-top > div {
  max-width: 540px;
}

.article-end-top .eyebrow {
  margin-bottom: 12px;
}

.article-end-top p {
  margin-top: 10px;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.65;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 22px;
}

.article-tags span {
  min-height: 31px;
  display: inline-flex;
  align-items: center;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: .67rem;
}

/* Final CTA */
.blog-final-cta {
  padding: 0 0 clamp(5rem, 8vw, 6.5rem);
}

.blog-final-cta-box {
  position: relative;
  overflow: hidden;
  padding: 55px 32px;
  border: 1px solid var(--line-lime);
  border-radius: 27px;
  background:
    linear-gradient(120deg, rgba(203,252,4,.055), transparent 36%),
    linear-gradient(155deg, #181a16, #10110f);
  text-align: center;
}

.blog-final-cta-box::before {
  content: "";
  position: absolute;
  inset: 22px;
  border-radius: 19px;
  background:
    linear-gradient(var(--lime), var(--lime)) left top / 58px 1px no-repeat,
    linear-gradient(var(--lime), var(--lime)) left top / 1px 37px no-repeat,
    linear-gradient(var(--lime), var(--lime)) right bottom / 58px 1px no-repeat,
    linear-gradient(var(--lime), var(--lime)) right bottom / 1px 37px no-repeat;
  opacity: .42;
}

.blog-final-cta-box > * {
  position: relative;
  z-index: 2;
}

.blog-final-cta-box .eyebrow {
  margin-bottom: 14px;
}

.blog-final-cta-box h2 {
  max-width: 760px;
  margin-inline: auto;
}

.blog-final-cta-box p {
  max-width: 620px;
  margin: 17px auto 0;
}

.blog-final-cta-box .btn-row {
  justify-content: center;
}

/* Mobile outline */
.mobile-outline {
  display: none;
}

/* Responsiveness */
@media (max-width: 1240px) {
  .article-layout {
    grid-template-columns: 190px minmax(0, var(--article-max));
  }

  .article-rail {
    display: none;
  }

  .blog-hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-brief {
    max-width: 760px;
  }
}

@media (max-width: 860px) {
  .article-layout {
    grid-template-columns: 1fr;
    max-width: var(--article-max);
    margin-inline: auto;
  }

  .article-outline {
    display: none;
  }

  .mobile-outline {
    display: block;
    margin-bottom: 28px;
  }

  .mobile-outline details {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255,255,255,.012);
  }

  .mobile-outline summary {
    cursor: pointer;
    padding: 15px 17px;
    color: #e2e6de;
    font: 700 .78rem "Satoshi", sans-serif;
  }

  .mobile-outline nav {
    display: grid;
    padding: 0 17px 14px;
  }

  .mobile-outline a {
    padding: 8px 0;
    color: var(--muted);
    font-size: .76rem;
  }
}

@media (max-width: 760px) {
  .blog-hero {
    padding: 103px 0 49px;
  }

  .blog-hero-copy h1 {
    max-width: none;
    font-size: clamp(2.25rem, 10.5vw, 3.15rem);
    line-height: 1.06;
  }

  .blog-meta {
    display: grid;
    gap: 7px;
  }

  .meta-dot::before {
    display: none;
  }

  .article-shell {
    padding-top: 28px;
  }

  .article-body p,
  .article-body ul,
  .article-body ol {
    font-size: .96rem;
  }

  .visual-inner {
    min-height: 270px;
    padding: 22px;
  }

  .visual-demo {
    grid-template-columns: 1fr;
  }

  .article-end-top {
    display: block;
  }

  .blog-final-cta-box {
    padding: 50px 22px;
  }
}