*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  width: 100%;
  font-family: 'Segoe UI', Roboto, sans-serif;
  color: #0f172a;
  background: #f8fafc;
}
.container {
  max-width: 1200px;
  padding: 0 24px;
  margin: 0 auto;
}
.blog-hero {
  background: #fff;
  text-align: center;
  padding: 80px 24px;
  border-bottom: 1px solid #e5e7eb;
}
.blog-hero h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin: 0 0 12px;
  font-weight: 800;
  color: #0f172a;
}
.blog-hero p {
  max-width: 720px;
  margin: 0 auto;
  color: #475569;
  font-size: 1.05rem;
}
.controls {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}
.controls .row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  padding: 20px 0;
}
.filter-btn {
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #0f172a;
  padding: 10px 14px;
  border-radius: 9999px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}
.filter-btn:hover {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}
.filter-btn.active {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}
.search {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 260px;
}
.search input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  font-size: 0.95rem;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.search input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}
.blog-grid {
  padding: 32px 0 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 10px rgba(2, 6, 23, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  opacity: 0;
  transform: translateY(16px);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.08);
}
.card.reveal-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.tag {
  display: inline-block;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  border-radius: 9999px;
  padding: 6px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.card h3 {
  margin: 6px 0 10px;
  font-size: 1.1rem;
  color: #0f172a;
}
.card p {
  margin: 0;
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.55;
}
.newsletter {
  background: #fff;
  border-top: 1px solid #e5e7eb;
  padding: 64px 24px;
}
.newsletter .box {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.newsletter h2 {
  margin: 0 0 8px;
  font-size: 1.8rem;
  color: #0f172a;
}
.newsletter p {
  margin: 0 auto 24px;
  color: #475569;
  max-width: 560px;
}
.newsletter .newsletter-form {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
  justify-content: center;
}
.newsletter input {
  flex: 1;
  min-width: 200px;
  padding: 12px 16px;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  font-size: 0.95rem;
}
.newsletter button {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 24px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}
.newsletter button:hover {
  transform: translateY(-2px);
  background: #1d4ed8;
}
@media (max-width: 1200px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .blog-hero {
    padding: 56px 24px;
  }
  .controls .row {
    flex-direction: column;
    align-items: stretch;
  }
  .search {
    margin-left: 0;
    width: 100%;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
}