/**
 * Bridge3 — Página "Blog". Hero + certificações + grade de posts.
 */

/* ============ HERO ============ */
.blog-hero {
  position: relative;
  isolation: isolate;
  background: var(--grad-bridge3);
  color: var(--c-on-dark);
  text-align: center;
  overflow: hidden;
  padding-top: clamp(7rem, 5rem + 8vw, 10rem);
  padding-bottom: clamp(3rem, 2rem + 3vw, 4rem);
}
.blog-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: url("../img/textura.webp");
  background-size: cover;
  background-position: center;
  opacity: 0.1;
  pointer-events: none;
}
.blog-hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: clamp(8rem, 6rem + 6vw, 10rem);
  max-width: 54rem;
  margin-inline: auto;
  padding-top: clamp(2rem, 1rem + 4vw, 4rem);
}
.blog-hero__title {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: clamp(2.25rem, 1.4rem + 3.6vw, 3.5rem);
  line-height: 1.3;
  color: var(--CInza-50, #f3f3f3);
  text-shadow: 0 4px 2px rgba(0, 0, 0, 0.25);
  margin: 0;
}

/* ============ GRID HEAD ============ */
.blog-grid__head {
  text-align: center;
  margin-bottom: var(--space-6);
}
.blog-grid__head h2 {
  font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.5rem);
  font-weight: var(--fw-bold);
  color: var(--c-navy);
  margin-bottom: var(--space-2);
}
.blog-grid__head p {
  font-size: 1.125rem;
  line-height: 1.3;
  color: var(--c-muted, #595959);
  margin: 0;
}

/* ============ SEARCH + FILTERS ============ */
.blog-grid__tools {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  margin-bottom: var(--space-7);
}
.blog-grid__search {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 50rem;
  min-height: 3rem;
  padding: 0.25rem 0.75rem 0.25rem 2.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.02), 0 2px 4px rgba(0, 0, 0, 0.08);
}
.blog-grid__search-icon {
  position: absolute;
  left: 1.25rem;
  display: inline-flex;
  color: var(--c-muted);
}
.blog-grid__search-input {
  width: 100%;
  border: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--c-body);
  min-height: 2.75rem;
}
.blog-grid__search-input::placeholder {
  color: #717182;
}
.blog-grid__search-input:focus {
  outline: none;
}
.blog-grid__search:focus-within {
  box-shadow: var(--focus-ring);
}
.blog-grid__filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  max-width: 100%;
}
.blog-grid__filter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  background: #f3f4f6;
  color: #364153;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  line-height: 1.25;
  text-decoration: none;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.04), 0 4px 4px rgba(0, 0, 0, 0.06);
  transition: background var(--t), color var(--t), border-color var(--t);
}
.blog-grid__filter:hover {
  color: var(--c-navy);
}
.blog-grid__filter.is-active,
.blog-grid__filter[aria-current="true"] {
  background: var(--Azul-700, #192c3a);
  color: #fff;
}
.blog-grid__filter:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ============ GRID ============ */
.blog-grid__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6) var(--space-5);
  justify-items: center;
}
.blog-grid__empty,
.blog-grid__fallback {
  text-align: center;
  color: var(--c-navy-500);
}
.blog-grid__sentinel {
  height: 1px;
  margin-top: var(--space-7);
  pointer-events: none;
}
.blog-grid__sentinel.is-loading {
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.blog-grid__sentinel.is-loading::before {
  content: "";
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--c-navy-500, #1a3a4a);
  border-right-color: transparent;
  border-radius: 50%;
  animation: blog-spin 0.8s linear infinite;
}
@media (prefers-reduced-motion: reduce) {
  .blog-grid__sentinel.is-loading::before {
    animation: none;
    border-right-color: currentColor;
    opacity: 0.5;
  }
}
@keyframes blog-spin {
  to { transform: rotate(360deg); }
}

/* ============ CARD ============ */
.blog-card {
  width: 100%;
  max-width: 21.25rem;
}
.blog-card__article {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  height: 100%;
  background: transparent;
  border-radius: var(--radius-xl);
  filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.04)) drop-shadow(0 4px 4px rgba(0, 0, 0, 0.06));
}
.blog-card__media {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-xl);
  aspect-ratio: 1176 / 660;
  background: var(--c-line);
}
.blog-card__image,
.blog-card__placeholder {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-xl);
}
.blog-card__placeholder {
  background: var(--c-line);
}
.blog-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: 0 0 var(--space-6);
  flex: 1;
}
.blog-card__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.blog-card__title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--c-navy);
}
.blog-card__title a {
  color: inherit;
  text-decoration: none;
}
.blog-card__title a:hover {
  text-decoration: underline;
}
.blog-card__byline {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--c-muted, #595959);
}
.blog-card__cta {
  align-self: flex-start;
  min-width: 11rem;
  min-height: 3rem;
  margin-top: auto;
}

@media (max-width: 1024px) {
  .blog-grid__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .blog-grid__filters {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: var(--space-2);
    scrollbar-width: thin;
    width: 100%;
  }
  .blog-grid__filter {
    flex-shrink: 0;
    white-space: nowrap;
  }
  .blog-grid__list {
    grid-template-columns: 1fr;
  }
}