/* app/static/css/blogpost/case-study.css
   Case Studies: portada (grid de tarjetas) y páginas individuales.
   Se apoya en articles.css para la tipografía editorial. */

/* ── Portada ── */

.cs-index {
  max-width: 1040px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.cs-index * {
  text-align: left;
}

.cs-index h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.cs-index .section-lead {
  color: var(--muted-text-color);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  max-width: 640px;
}

.cs-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.cs-filters button {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--hover-bg-color);
  background: transparent;
  color: var(--main-text-color);
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.cs-filters button:hover,
.cs-filters button[aria-pressed="true"] {
  background-color: var(--hover-bg-color);
  color: var(--hover-text-color);
}

.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.cs-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--hover-bg-color);
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--sidebar-bg-color);
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.5s;
}

.cs-card[hidden] {
  display: none;
}

.cs-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.cs-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}

.cs-card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--hover-bg-color);
}

.cs-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
  transition: transform 0.4s;
}

.cs-card:hover .cs-card-media img {
  transform: scale(1.03);
}

.cs-card-media.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #5A6D7C 0%, #3d4a55 100%);
}

.cs-card-media.placeholder span {
  font-family: "Menlo", "SFMono-Regular", Consolas, monospace;
  font-size: 0.85rem;
  color: #fff;
  opacity: 0.85;
  padding: 1rem;
  text-align: center;
}

.cs-card-body {
  padding: 1.1rem 1.2rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex: 1;
}

.cs-card .article-category {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hover-bg-color);
}

.cs-card h2 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
  color: var(--main-text-color);
}

.cs-card p {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted-text-color);
  margin: 0;
  flex: 1;
}

.cs-card .cs-stack {
  margin-top: 0.5rem;
}

/* ── Página individual ── */

.case-study * {
  text-align: left;
}

.cs-back {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted-text-color);
  margin-bottom: 1.5rem;
  transition: color 0.2s;
}

.cs-back:hover {
  color: var(--main-text-color);
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
}

.cs-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.cs-stack li {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--hover-bg-color);
  border-radius: 4px;
  color: var(--main-text-color);
}

.cs-demo {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--hover-bg-color);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.case-study .article-body h2 {
  font-size: 1.35rem;
  margin-top: 2.8rem;
}

.case-study .article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 2rem 0 0.6rem;
  color: var(--main-text-color);
}

.case-study .article-body ul,
.case-study .article-body ol {
  padding-left: 1.4rem;
  margin: 0 0 1.4rem;
  list-style-position: outside;
}

.case-study .article-body ul {
  list-style-type: disc;
}

.case-study .article-body ol {
  list-style-type: decimal;
}

.case-study .article-body li {
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 0.45rem;
  color: var(--main-text-color);
}

.case-study .article-body li p {
  margin-bottom: 0.6rem;
}

.case-study .article-body a {
  color: var(--hover-bg-color);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Figuras */

.case-study figure {
  margin: 2.2rem 0;
}

.case-study figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  border: 1px solid var(--hover-bg-color);
}

.case-study figure.phones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  justify-items: center;
}

.case-study figure.phones img {
  max-width: 260px;
  border-radius: 18px;
}

.case-study figure.phones figcaption {
  grid-column: 1 / -1;
}

.case-study figure.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

.case-study figure.pair figcaption {
  grid-column: 1 / -1;
}

.case-study figcaption {
  font-size: 0.85rem;
  color: var(--muted-text-color);
  margin-top: 0.6rem;
  line-height: 1.5;
}

/* Fórmulas (MathJax) */

.case-study .formula {
  margin: 1.4rem 0;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  background-color: var(--sidebar-bg-color);
  border: 1px solid var(--hover-bg-color);
  overflow-x: auto;
  transition: background-color 0.5s;
}

/* Callouts reutilizados de articles.css: .data-callout */

.case-study .result-callout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.case-study .result-callout div {
  padding: 1rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--hover-bg-color);
  background-color: var(--sidebar-bg-color);
  transition: background-color 0.5s;
}

.case-study .result-callout strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 0.3rem;
  color: var(--main-text-color);
}

.case-study .result-callout span {
  font-size: 0.85rem;
  color: var(--muted-text-color);
}

/* Código */

.case-study code {
  font-family: "Menlo", "SFMono-Regular", Consolas, monospace;
  font-size: 0.88em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background-color: var(--sidebar-bg-color);
  border: 1px solid var(--hover-bg-color);
  color: var(--main-text-color);
}

.case-study pre {
  margin: 1.6rem 0;
  padding: 1.2rem 1.4rem;
  border-radius: 8px;
  background-color: #1f2429;
  border: 1px solid #3a434b;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
}

.case-study pre code {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  color: #e6e9ec;
  white-space: pre;
  font-size: inherit;
}

/* Navegación anterior / siguiente */

.cs-nav {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}

.cs-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 48%;
  color: var(--main-text-color);
  transition: opacity 0.2s;
}

.cs-nav-link:hover {
  opacity: 0.7;
}

.cs-nav-link span {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-text-color);
}

.cs-nav-link strong {
  font-size: 0.98rem;
  line-height: 1.35;
}

.cs-nav-link.next {
  margin-left: auto;
  align-items: flex-end;
}

.cs-nav-link.next * {
  text-align: right;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .cs-index {
    padding: 2rem 1rem 3rem;
  }

  .cs-index h1 {
    font-size: 1.7rem;
  }

  .case-study figure.pair {
    grid-template-columns: 1fr;
  }

  .cs-nav {
    flex-direction: column;
  }

  .cs-nav-link,
  .cs-nav-link.next {
    max-width: 100%;
    align-items: flex-start;
  }

  .cs-nav-link.next * {
    text-align: left;
  }
}