/* ==============================
   Article System (Long-form Pages)
   California Bitcoin Education Lab LLC
   ============================== */

:root {
  --max: 1200px;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0,0,0,0.5);
  --pill: 999px;
  --btc-orange: #f7931a;
}

.article-page {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0 80px;
  position: relative;
  overflow-x: clip;
}

/* Panels */
.article-panel {
  background: rgba(10,10,10,.65);
  border: 3px solid rgba(247,147,26,.22);
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Hero Section */
.article-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 28px;
  margin-bottom: 18px;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: -140px -140px auto auto;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(247,147,26,0.22), rgba(247,147,26,0) 60%);
  pointer-events: none;
}

.article-hero-inner {
  position: relative;
  z-index: 1;
}

.article-eyebrow {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .75;
  margin-bottom: 10px;
}

.article-title {
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.05;
  margin: 0 0 10px;
}

.article-subtitle {
  font-size: 18px;
  margin: 0 0 8px;
  opacity: .92;
}

.article-support {
  margin: 0;
  opacity: .78;
  max-width: 72ch;
}

/* Layout Grid */
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

.article-body { padding: 0; }

/* Scroll offset for rail links */
.article-section,
.article-next {
  scroll-margin-top: 100px;
}

/* Section styling */
.article-section {
  padding: 22px 8px 0;
}

/* Section styling */
.article-section {
  padding: 22px 8px 0;
}

/* Article Images (NEW) */
.article-image {
  max-width: 620px;
  margin: 1.25rem auto 1.75rem;
  border-radius: 1.25rem;
  overflow: hidden;
  border: 1px solid rgba(247,147,26,0.12);
  background: #000;
  box-shadow: 0 0 0 1px rgba(0,0,0,.4) inset;
}

.article-image img {
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: contain;
  display: block;
}

.article-section h2 {
  margin: 8px 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

.article-section p {
  margin: 0 0 12px;
  line-height: 1.7;
  opacity: .92;
}

.article-divider {
  height: 1px;
  margin: 18px 0 0;
  background: linear-gradient(
    90deg,
    rgba(247,147,26,0),
    rgba(247,147,26,0.22),
    rgba(247,147,26,0)
  );
  border-radius: 999px;
}

/* Bullet grid */
.article-bullets {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 12px 0 14px;
}

.article-bullet {
  padding: 14px 14px 12px;
  border-radius: 22px;
  background: rgba(14,14,14,.7);
  border: 2px solid rgba(247,147,26,.14);
  transition: all .12s ease;
}

.article-bullet:hover {
  border-color: rgba(247,147,26,.24);
  background: rgba(18,18,18,.78);
}

.article-bullet-title {
  font-weight: 650;
  margin-bottom: 6px;
}

.article-bullet-body {
  opacity: .82;
  line-height: 1.6;
}

/* Next / CTA Section */
.article-next {
  margin-top: 18px;
  padding: 18px 16px 16px;
  border-radius: calc(var(--radius) + 10px);
  background: rgba(10,10,10,.65);
  border: 3px solid rgba(247,147,26,.16);
  box-shadow: var(--shadow);
}

.article-next-title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
}

.article-next-subtitle {
  margin: 0 0 14px;
  opacity: .82;
  line-height: 1.7;
}

.article-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

.article-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 12px 14px;
  border-radius: calc(var(--radius) + 2px);
  border: 2px solid rgba(247,147,26,.35);
  background: rgba(247,147,26,.10);
  box-shadow: 0 0 0 1px rgba(0,0,0,.35) inset;
  transition: all .16s ease;
  min-height: 48px; /* For Google Tap Target Compliance */
}

.article-btn:hover {
  transform: translateY(-1px);
  background: rgba(247,147,26,.14);
  border-color: rgba(247,147,26,.45);
  box-shadow: 0 0 24px rgba(247,147,26,.12);
}

.article-btn-ghost {
  border: 2px solid rgba(247,147,26,.20);
  background: rgba(14,14,14,.65);
}

.article-disclaimer {
  margin: 0;
  opacity: .65;
  font-size: 13px;
}

/* ==============================
   Right Rail (Desktop Navigation)
   ============================== */

.article-rail {
  display: none;
  position: sticky;
  top: 100px; /* Aligned with scroll-margin-top */
  align-self: start;
}

.article-rail-panel { padding: 16px; }

.article-rail-title {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .7; /* Improved for readability */
  margin-bottom: 10px;
}

.article-rail-nav {
  display: grid;
  gap: 8px;
}

.article-rail-nav a {
  padding: 10px 10px;
  border-radius: 16px;
  border: 2px solid rgba(247,147,26,.14);
  background: rgba(10,10,10,.25);
  opacity: .88;
  text-decoration: none;
  color: inherit;
  /* Smooth transitions for all states */
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

.article-rail-nav a:hover {
  background: rgba(247,147,26,.08);
  border-color: rgba(247,147,26,.22);
  color: var(--btc-orange);
}

.article-rail-nav a.is-active {
  background: rgba(247,147,26,.12);
  border-color: rgba(247,147,26,.35);
  /* The 'Pop' effect */
  transform: translateX(6px); 
  color: var(--btc-orange);
  font-weight: 600;
  opacity: 1;
}

.article-rail-copy {
  margin: 0;
  line-height: 1.7;
  opacity: .84;
}

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

@media (min-width: 760px) {
  .article-bullets { grid-template-columns: 1fr 1fr; }
  .article-actions { grid-template-columns: 1fr 1fr 1fr; }
}

@media (min-width: 980px) {
  .article-grid {
    grid-template-columns: 1fr 340px;
    gap: 18px;
  }
  .article-rail {
    display: grid;
    gap: 14px;
  }
}

@media (max-width: 640px) {
  .article-page {
    width: min(var(--max), calc(100% - 32px));
    padding: 18px 0 60px;
  }
  .article-title {
    font-size: 34px;
    line-height: 1.08;
  }
  .article-section h2 {
    font-size: 20px;
  }
}