/* ============================================================
   Article Page — article.css
   Linked only from article pages; not imported into main.css
   ============================================================ */

/* ---- Reading Progress Bar ---- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 2000;
  will-change: transform;
}

/* ---- Article Hero ---- */
.article-hero {
  padding-top: 10rem;
  padding-bottom: 6rem;
  background-color: var(--bg-color-alt);
  text-align: center;
}

.article-hero__inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

.article-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.article-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  border-radius: 99px;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-color-muted);
}

.article-hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
  color: var(--text-color);
}

.article-hero__subtitle {
  font-size: 1.2rem;
  color: var(--text-color-muted);
  line-height: 1.65;
  max-width: 620px;
  margin: 0 auto 2.25rem;
}

.article-hero__byline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-color-muted);
  flex-wrap: wrap;
}

.article-hero__sep {
  color: var(--surface-border);
}

.article-hero__draft-badge {
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  color: var(--text-color-muted);
  padding: 0.2rem 0.65rem;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---- Article Layout (TOC + Content) ---- */
.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 5rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 5rem 2rem 2rem;
  align-items: start;
}

/* ---- Table of Contents ---- */
.article-toc {
  position: sticky;
  top: 6rem;
}

.article-toc__label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  display: block;
}

.article-toc__list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.toc-link {
  display: block;
  font-size: 0.85rem;
  color: var(--text-color-muted);
  padding: 0.4rem 0.8rem;
  border-left: 2px solid var(--surface-border);
  transition: color var(--duration-fast) var(--ease-entrance),
              border-color var(--duration-fast) var(--ease-entrance);
  line-height: 1.4;
}

@media (hover: hover) {
  .toc-link:hover {
    color: var(--text-color);
    border-left-color: var(--text-color-muted);
  }
}

.toc-link.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}

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

.article-section {
  margin-bottom: 4.5rem;
}

.article-section h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  padding-top: 1rem;
}

.article-body p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-color);
  margin-bottom: 1.25rem;
}

.article-lead {
  font-size: 1.2rem !important;
  line-height: 1.75 !important;
  margin-bottom: 1.5rem !important;
  border-left: 3px solid var(--surface-border);
  padding-left: 1.25rem;
  color: var(--text-color) !important;
}

/* ---- Article Figure ---- */
.article-figure {
  margin: 2.5rem 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--surface-border);
}

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

figcaption {
  font-size: 0.85rem;
  color: var(--text-color-muted);
  padding: 0.75rem 1.25rem;
  background-color: var(--surface-color);
  text-align: center;
  font-style: italic;
}

/* ---- Callout / Pull Quote ---- */
.article-callout {
  background-color: var(--surface-color);
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  padding: 1.5rem 1.75rem;
  margin: 2.5rem 0;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-color);
  line-height: 1.65;
  font-style: italic;
}

/* ---- Feature List (Why Fusion) ---- */
.article-feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  margin: 2rem 0;
}

.article-feature-list li {
  border-left: 2px solid var(--surface-border);
  padding-left: 1.5rem;
  transition: border-color var(--duration-fast) var(--ease-entrance);
}

@media (hover: hover) {
  .article-feature-list li:hover {
    border-left-color: var(--accent-2);
  }
}

.article-feature-list__title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-color);
  margin-bottom: 0.4rem;
}

.article-feature-list p {
  margin-bottom: 0 !important;
  color: var(--text-color-muted) !important;
  font-size: 0.9688rem !important;
}

/* ---- Numbered List (Barriers) ---- */
.article-numbered-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 2rem 0;
  counter-reset: barrier-counter;
}

.article-numbered-list li {
  counter-increment: barrier-counter;
  position: relative;
  padding-left: 3.75rem;
}

.article-numbered-list li::before {
  content: counter(barrier-counter);
  position: absolute;
  left: 0;
  top: 0.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.article-numbered-list__title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-color);
  margin-bottom: 0.4rem;
}

.article-numbered-list p {
  margin-bottom: 0 !important;
  color: var(--text-color-muted) !important;
  font-size: 0.9688rem !important;
}

/* ---- Player Cards ---- */
.player-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 2rem 0;
}

.player-card {
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--duration-fast) var(--ease-entrance);
}

@media (hover: hover) {
  .player-card:hover {
    transform: translateY(-4px);
  }
}

.player-card__header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--surface-border);
}

.player-card__label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.player-card__name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.65rem;
}

.player-card__approach {
  font-size: 0.875rem !important;
  color: var(--text-color-muted) !important;
  line-height: 1.55 !important;
  margin-bottom: 0 !important;
}

.player-card__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.player-card__pro,
.player-card__con {
  padding: 1.25rem 1.25rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-color-muted);
}

.player-card__pro {
  border-right: 1px solid var(--surface-border);
}

.player-card__col-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin-bottom: 0.5rem;
}

.player-card__pro p,
.player-card__con p {
  margin-bottom: 0 !important;
  font-size: 0.875rem !important;
  line-height: 1.55 !important;
}

/* ---- Investor Grid ---- */
.investor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

.investor-card {
  background-color: var(--bg-color-alt);
  border: 1px solid var(--surface-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.investor-card__type {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.investor-card__examples {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-color-muted);
  margin-bottom: 0.85rem !important;
}

.investor-card__desc {
  font-size: 0.9rem !important;
  line-height: 1.6 !important;
  color: var(--text-color) !important;
  margin-bottom: 0 !important;
}

/* ---- Section Divider ---- */
.article-divider {
  border: none;
  border-top: 1px solid var(--surface-border);
  margin: 4rem 0;
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .article-layout {
    grid-template-columns: 1fr;
    padding: 3rem 1.5rem 2rem;
    gap: 0;
  }

  .article-toc {
    display: none;
  }

  .article-hero {
    padding-top: 7rem;
    padding-bottom: 3.5rem;
    text-align: left;
  }

  .article-hero__inner {
    padding: 0 1.5rem;
  }

  .article-hero__tags {
    justify-content: flex-start;
  }

  .article-hero__subtitle {
    margin-left: 0;
    margin-right: 0;
    font-size: 1.05rem;
  }

  .article-hero__byline {
    justify-content: flex-start;
  }

  .player-grid {
    grid-template-columns: 1fr;
  }

  .player-card__columns {
    grid-template-columns: 1fr;
  }

  .player-card__pro {
    border-right: none;
    border-bottom: 1px solid var(--surface-border);
  }

  .investor-grid {
    grid-template-columns: 1fr;
  }

  .article-section h2 {
    font-size: 1.5rem;
  }

  .article-callout {
    font-size: 1rem;
  }
}