/* ========================================
   HFL ENGENHARIA — BLOG STYLESHEET
   ======================================== */

/* ── BLOG HERO ── */
.blog-hero {
  padding: 160px 60px 80px;
  position: relative;
  overflow: hidden;
}
.blog-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(to right, transparent, var(--red), transparent);
  box-shadow: 0 0 20px rgba(204,0,0,0.3);
}
.blog-hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 100% at 20% 50%, rgba(180,0,0,0.06) 0%, transparent 70%),
    linear-gradient(135deg, var(--black) 0%, var(--dark) 100%);
}

.blog-hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(200px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 0, 0, 0.1), transparent 60%);
  z-index: 3;
  opacity: 0;
  transition: opacity 0.5s ease;
  mix-blend-mode: screen;
}
.blog-hero:hover .blog-hero-glow {
  opacity: 1;
}

.blog-hero-content { position: relative; z-index: 1; }

/* ── BLOG GRID ── */
.blog-section { padding: 80px 60px 100px; }

.blog-filter {
  display: flex;
  gap: 12px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}
.filter-btn {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 10px 24px;
  border: 1px solid var(--gray-dark);
  background: transparent;
  color: var(--gray-lighter);
  cursor: pointer;
  clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
  transition: all 0.3s;
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--red);
  color: var(--red);
  background: rgba(204,0,0,0.05);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--gray-dark);
}

.blog-card {
  background: var(--dark);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: background 0.3s;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.blog-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.blog-card:hover { background: #181818; }
.blog-card:hover::after { transform: scaleX(1); }

.blog-card-img-wrap {
  width: 100%;
  height: 200px;
  overflow: hidden;
  display: block;
  flex-shrink: 0;
}

.blog-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(30%);
  transition: filter 0.4s, transform 0.4s;
}
.blog-card:hover .blog-card-img { filter: grayscale(0%); transform: scale(1.03); }

.blog-card-img-placeholder {
  width: 100%;
  height: 100%;
  background: var(--dark-2);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--gray-dark);
}
.blog-card-img-placeholder svg { width: 40px; height: 40px; stroke: var(--gray-dark); fill: none; }


.blog-card-body { padding: 32px 28px; flex: 1; display: flex; flex-direction: column; gap: 12px; }

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.blog-card-tag {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--red);
  background: rgba(204,0,0,0.08);
  padding: 4px 10px;
  clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
}
.blog-card-date {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 2px;
  color: var(--gray);
}

.blog-card-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.5px;
  line-height: 1.3;
  color: var(--white);
}

.blog-card-excerpt {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--gray-light);
  flex: 1;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-dark);
  margin-top: auto;
}
.blog-card-read {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--red);
}
.blog-card-arrow { color: var(--red); font-size: 18px; transition: transform 0.3s; }
.blog-card:hover .blog-card-arrow { transform: translateX(4px); }

.blog-empty {
  grid-column: 1/-1;
  text-align: center;
  padding: 80px 40px;
  color: var(--gray);
}
.blog-empty p {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 18px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ── SINGLE POST ── */
.post-hero {
  padding: 160px 60px 60px;
  position: relative;
  background: linear-gradient(135deg, var(--black) 0%, var(--dark) 100%);
}
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-lighter);
  text-decoration: none;
  margin-bottom: 40px;
  transition: color 0.3s;
}
.post-back:hover { color: var(--red); }
.post-back svg { width: 16px; height: 16px; stroke: currentColor; fill: none; }

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.post-hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(40px, 6vw, 80px);
  line-height: 1;
  letter-spacing: 2px;
  color: var(--white);
  max-width: 900px;
  margin-bottom: 24px;
}
.post-hero-desc {
  font-size: 20px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--gray-light);
  max-width: 700px;
  margin-bottom: 40px;
}

/* ── POST COVER IMAGE ── */
.post-cover-wrap {
  width: 100%;
  max-height: 500px;
  overflow: hidden;
  position: relative;
}
.post-cover-wrap::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 120px;
  background: linear-gradient(to bottom, transparent, var(--black));
  pointer-events: none;
}
.post-cover-img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  display: block;
  filter: grayscale(20%);
}

.post-body-wrapper {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 80px;
  padding: 60px 60px 100px;
  max-width: 1400px;
}

.post-content {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.9;
  color: var(--silver);
}
.post-content h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 38px;
  letter-spacing: 2px;
  color: var(--white);
  margin: 48px 0 20px;
}
.post-content h3 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--white);
  margin: 36px 0 16px;
}
.post-content p { margin-bottom: 20px; }
.post-content strong { color: var(--white); font-weight: 600; }
.post-content em { color: var(--gray-lighter); }
.post-content blockquote {
  border-left: 3px solid var(--red);
  padding: 20px 28px;
  background: var(--dark-2);
  margin: 32px 0;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--silver);
}
.post-content ul, .post-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.post-content li::marker { color: var(--red); }

.post-sidebar { padding-top: 8px; }
.post-sidebar-widget {
  border: 1px solid var(--gray-dark);
  padding: 28px;
  margin-bottom: 28px;
}
.post-sidebar-widget h4 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gray-lighter);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-dark);
}

.related-post {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--gray-dark);
  text-decoration: none;
  transition: padding-left 0.3s;
}
.related-post:last-child { border-bottom: none; }
.related-post:hover { padding-left: 8px; }
.related-post-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
  line-height: 1.3;
}
.related-post-date {
  font-size: 13px;
  color: var(--gray);
  letter-spacing: 1px;
}

/* ── POST RICH TEXT EXTRAS ── */
.post-content h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 48px;
  letter-spacing: 2px;
  color: var(--white);
  margin: 56px 0 24px;
}
.post-content a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px dashed var(--red);
  transition: opacity 0.3s;
}
.post-content a:hover {
  opacity: 0.8;
}
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  display: block;
  margin: 32px 0;
}
.post-content iframe {
  max-width: 100%;
  margin: 32px 0;
}

/* ── MOBILE BLOG ── */
@media (max-width: 900px) {
  .blog-hero { padding: 120px 24px 60px; }
  .blog-section { padding: 60px 24px 80px; }
  .blog-grid { grid-template-columns: 1fr; }
  .post-hero { padding: 120px 24px 40px; }
  .post-body-wrapper { grid-template-columns: 1fr; gap: 40px; padding: 40px 24px 80px; }
  .post-sidebar { display: none; }
}