/* Long-form case-study page styling. Inherits the design tokens from styles.css
   (loaded first) and adds article typography + layout. */

.cs-page-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(8, 9, 11, 0.82);
  backdrop-filter: blur(12px);
  z-index: 10;
}
.cs-page-bar .brand-mark {
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text);
}
.cs-page-nav { display: flex; gap: 20px; }
.cs-page-nav a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.86rem;
  transition: color 0.15s;
}
.cs-page-nav a:hover { color: var(--text); }

.cs-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 28px 96px;
}
.cs-article .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}
.cs-article h1 {
  font-size: clamp(2rem, 5vw, 2.9rem);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 14px;
}
.cs-article .cs-sub {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.6;
  margin: 0 0 36px;
}

.cs-specbar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  margin: 0 0 44px;
}
.cs-specbar div { background: var(--surface); padding: 14px 16px; }
.cs-specbar dt {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin: 0 0 4px;
}
.cs-specbar dd { margin: 0; font-size: 1.02rem; font-weight: 560; }

.cs-article h2 {
  font-size: 1.4rem;
  letter-spacing: -0.015em;
  margin: 44px 0 14px;
}
.cs-article p {
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--text);
  margin: 0 0 18px;
}
.cs-article strong { color: var(--text); font-weight: 620; }

.cs-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 44px 0 0;
  padding: 22px 24px;
  border: 1px solid var(--accent-line);
  border-radius: 14px;
  background: var(--accent-soft);
}
.cs-cta p { margin: 0; flex: 1 1 240px; font-size: 0.95rem; color: var(--text-2); }
.cs-cta a {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 10px;
  background: var(--accent);
  color: #07080a;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}
.cs-cta a:hover { background: var(--accent-strong); }

.cs-disclaimer {
  margin: 40px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-3);
}

/* Case-study index grid */
.cs-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin: 8px 0;
}
.cs-index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}
.cs-index-card:hover {
  border-color: var(--line-emphasis);
  transform: translateY(-2px);
}
.cs-index-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}
.cs-index-name {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.cs-index-fam { font-size: 0.78rem; color: var(--accent); }
.cs-index-lede {
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--text-2);
  margin-top: 2px;
}

.cs-related { margin: 48px 0 0; }
.cs-related h2 { font-size: 1.05rem; margin-bottom: 14px; }
.cs-related-links { display: flex; flex-wrap: wrap; gap: 10px; }
.cs-related-links a {
  font-size: 0.84rem;
  color: var(--text-2);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 14px;
  transition: color 0.15s, border-color 0.15s;
}
.cs-related-links a:hover { color: var(--text); border-color: var(--line-emphasis); }

/* =========================================================
   MOBILE  ( <= 760 px )
   -----------------------------------------------------------
   Used by methodology.html, privacy.html, the case-studies index
   and the Pro stub. On phones the page-bar nav needs to scroll,
   the article body needs smaller headings + natural wrapping,
   and the "Related" link row stacks for tap-friendliness.
   ========================================================= */
@media (max-width: 760px) {
  .cs-page-bar {
    padding: 12px 14px;
    flex-wrap: wrap;
    gap: 8px 12px;
  }
  .cs-page-nav {
    flex: 1 1 100%;
    flex-wrap: nowrap;
    gap: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .cs-page-nav::-webkit-scrollbar { display: none; }
  .cs-page-nav a {
    flex-shrink: 0;
    white-space: nowrap;
  }
  .cs-article {
    padding: 26px 16px 56px;
  }
  .cs-article h1 {
    font-size: clamp(1.7rem, 7vw, 2.3rem);
    line-height: 1.15;
    overflow-wrap: break-word;
    word-break: break-word;
  }
  .cs-article h2 {
    font-size: 18px;
    margin-top: 28px;
  }
  .cs-article p,
  .cs-article .cs-sub {
    font-size: 15px;
    line-height: 1.55;
  }
  .cs-related-links {
    gap: 8px;
    flex-direction: column;
    align-items: stretch;
  }
  .cs-related-links a {
    text-align: center;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}