/* Modern Categories Section Styles */

.categories {
  position: relative;
  padding: var(--spacing-16) 0;
  background-color: var(--indigo-900);
  background-image: linear-gradient(135deg, var(--indigo-900) 0%, var(--indigo-800) 100%);
  overflow: hidden;
  color: var(--white);
  box-shadow: inset 0 -10px 30px rgba(0, 0, 0, 0.1);
  contain: layout paint style;
}

/* Reduce motion globally for this section if user/system prefers */
@media (prefers-reduced-motion: reduce) {
  .categories * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Optimize section background shapes */
.section-background,
.shape-category-1,
.shape-category-2 {
  will-change: transform, opacity;
}

/* Soften animated shapes to reduce paint cost */
.shape-category-1 {
  box-shadow: 0 10px 30px rgba(67, 97, 238, 0.15);
}

/* Grid container optimizations (in case defined elsewhere) */
.categories-grid {
  contain: layout paint style;
}

/* Card: performance tweaks */
.category-card {
  position: relative;
  background-color: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.10);
  transition-property: transform, box-shadow, border-color, color, background-color, opacity;
  transition-duration: 200ms;
  transition-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  border: 1px solid rgba(226, 232, 240, 0.8);
  height: 100%;
  display: flex;
  flex-direction: column;
  /* backdrop-filter is heavy on scroll — disable by default */
  backdrop-filter: none;
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(249, 250, 251, 0.8));
  padding: var(--spacing-4);
  box-sizing: border-box;
  content-visibility: auto;
  contain-intrinsic-size: 280px 380px;
  contain: content;
  will-change: transform;
}

/* Enable very light blur only on hover if supported */
@supports ((-webkit-backdrop-filter: blur(2px)) or (backdrop-filter: blur(2px))) {
  .category-card:hover {
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
  }
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
  border-color: rgba(99, 102, 241, 0.4);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(249, 250, 251, 0.9));
}



.card-top {
  position: relative;
  padding: var(--spacing-6) var(--spacing-6) var(--spacing-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
}

.category-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.10);
  position: relative;
  overflow: hidden;
  z-index: 2;
  flex-shrink: 0;
  will-change: transform;
}



.it-icon {
  background: linear-gradient(135deg, #4361ee, #3a0ca3);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(67, 97, 238, 0.3);
}

.business-icon {
  background: linear-gradient(135deg, #f72585, #b5179e);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(247, 37, 133, 0.25);
}

.language-icon {
  background: linear-gradient(135deg, #4cc9f0, #4361ee);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(76, 201, 240, 0.25);
}

.engineering-icon {
  background: linear-gradient(135deg, #fb8500, #ffb703);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(251, 133, 0, 0.25);
}

.social-icon {
  background: linear-gradient(135deg, #8338ec, #5e17eb);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(131, 56, 236, 0.25);
}

.health-icon {
  background: linear-gradient(135deg, #06d6a0, #1b9aaa);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(6, 214, 160, 0.25);
}

.law-icon {
  background: linear-gradient(135deg, #073b4c, #118ab2);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(7, 59, 76, 0.25);
}

.education-icon {
  background: linear-gradient(135deg, #ffbe0b, #fb8500);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(255, 190, 11, 0.25);
}

.art-icon {
  background: linear-gradient(135deg, #ff006e, #8338ec);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(255, 0, 110, 0.25);
}

.science-icon {
  background: linear-gradient(135deg, #8338ec, #3a0ca3);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(131, 56, 236, 0.25);
}

.agriculture-icon {
  background: linear-gradient(135deg, #38b000, #06d6a0);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(56, 176, 0, 0.25);
}

.environment-icon {
  background: linear-gradient(135deg, #31cb9e, #06d6a0);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(49, 203, 158, 0.25);
}

.default-icon {
  background: linear-gradient(135deg, #6b7280, #9ca3af);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(107, 114, 128, 0.25);
}

.dynamic-icon {
  /* Dynamic styles will be applied via inline CSS */
  color: var(--white);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.category-card:hover .category-icon {
  transform: scale(1.05);
  box-shadow: 0 12px 22px rgba(0, 0, 0, 0.15);
}

.category-card:hover .it-icon {
  box-shadow: 0 15px 30px rgba(67, 97, 238, 0.35);
}

.category-card:hover .business-icon {
  box-shadow: 0 15px 30px rgba(247, 37, 133, 0.3);
}

.category-card:hover .language-icon {
  box-shadow: 0 15px 30px rgba(76, 201, 240, 0.3);
}

.category-card:hover .engineering-icon {
  box-shadow: 0 15px 30px rgba(251, 133, 0, 0.3);
}

.category-card:hover .social-icon {
  box-shadow: 0 15px 30px rgba(131, 56, 236, 0.3);
}

.category-card:hover .health-icon {
  box-shadow: 0 15px 30px rgba(6, 214, 160, 0.3);
}

.category-card:hover .law-icon {
  box-shadow: 0 15px 30px rgba(7, 59, 76, 0.3);
}

.category-card:hover .education-icon {
  box-shadow: 0 15px 30px rgba(255, 190, 11, 0.3);
}

.category-card:hover .art-icon {
  box-shadow: 0 15px 30px rgba(255, 0, 110, 0.3);
}

.category-card:hover .science-icon {
  box-shadow: 0 15px 30px rgba(131, 56, 236, 0.3);
}

.category-card:hover .agriculture-icon {
  box-shadow: 0 15px 30px rgba(56, 176, 0, 0.3);
}

.category-card:hover .environment-icon {
  box-shadow: 0 15px 30px rgba(49, 203, 158, 0.3);
}

.category-card:hover .default-icon {
  box-shadow: 0 15px 30px rgba(107, 114, 128, 0.3);
}

.category-card:hover .dynamic-icon {
  transform: scale(1.08) rotate(-5deg);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
}

.category-badge {
  background-color: rgba(249, 250, 251, 0.9);
  color: var(--gray-700);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(226, 232, 240, 0.8);
  backdrop-filter: none;
  margin-left: auto; /* Đẩy badge sang bên phải */
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-card:hover .category-badge {
  background-color: var(--white);
  color: var(--primary);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  border-color: rgba(99, 102, 241, 0.2);
}

.category-content {
  padding: var(--spacing-2) var(--spacing-6) var(--spacing-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.category-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-2);
  transition: all 0.3s ease;
  position: relative;
  display: inline-block;
  letter-spacing: -0.01em;
  line-height: 1.3;
  background: linear-gradient(90deg, var(--gray-900), var(--gray-700));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}


.category-card:hover .category-title {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 15px rgba(99, 102, 241, 0.1);
}

.category-description {
  color: var(--gray-600);
  margin-bottom: var(--spacing-4);
  flex-grow: 1;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: all 0.3s ease;
  max-height: 4.5em; /* Giới hạn chiều cao tối đa */
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3; /* Giới hạn số dòng */
  line-clamp: 3; /* Cho trình duyệt khác */
  -webkit-box-orient: vertical;
}

.category-card:hover .category-description {
  color: var(--gray-700);
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-5);
  transition: all 0.3s ease;
  padding-top: var(--spacing-1);
}

.category-tag {
  background-color: var(--gray-100);
  color: var(--gray-700);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}


/* Hiệu ứng nổi cho category-tag khi hover */
.category-card:hover .category-tag {
  background-color: var(--gray-50);
  color: var(--gray-800);
  border-color: rgba(99, 102, 241, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.06);
}

/* Tạo hiệu ứng stagger (lệch thời gian) cho các tag */
.category-card:hover .category-tag:nth-child(1) {
  transition-delay: 0.05s;
}

.category-card:hover .category-tag:nth-child(2) {
  transition-delay: 0.1s;
}

.category-card:hover .category-tag:nth-child(3) {
  transition-delay: 0.15s;
}

.category-card:hover .category-tag:nth-child(4) {
  transition-delay: 0.2s;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 var(--spacing-2); /* Điều chỉnh padding vì category-card đã có padding */
  position: relative;
  z-index: 1;
  margin-bottom: var(--spacing-2);
}

.modern-category-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-4);
  margin-top: auto; /* Đẩy footer xuống dưới cùng */
  border-top: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  width: 100%; /* Đảm bảo chiều rộng không vượt quá card */
  gap: var(--spacing-6); /* Tăng khoảng cách giữa docs-meta và explore-btn */
}

.category-card:hover .modern-category-footer {
  border-color: rgba(99, 102, 241, 0.2);
}

.docs-meta {
  display: flex;
  gap: var(--spacing-2); /* Giảm khoảng cách */
  transition: all 0.3s ease;
  background-color: rgba(249, 250, 251, 0.5);
  padding: var(--spacing-1) var(--spacing-2); /* Giảm padding */
  border-radius: var(--radius-lg);
  flex-shrink: 1; /* Cho phép co lại khi không đủ chỗ */
  max-width: 40%; /* Giảm chiều rộng tối đa */
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: 0.8rem;
  color: var(--gray-500);
  transition: all 0.3s ease;
  position: relative;
}

.meta-item i {
  color: var(--gray-400);
  transition: all 0.3s ease;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

/* Hiệu ứng hover cho meta-item */
.category-card:hover .meta-item {
  color: var(--gray-700);
}

/* Hiệu ứng hover cho icon trong meta-item */
.category-card:hover .meta-item i {
  color: var(--white);
  background-color: var(--primary-light);
  transform: scale(1.1);
  box-shadow: 0 2px 5px rgba(99, 102, 241, 0.25);
}

/* Thêm hiệu ứng stagger cho meta-item */
.category-card:hover .meta-item:nth-child(1) {
  transition-delay: 0.05s;
}

.category-card:hover .meta-item:nth-child(2) {
  transition-delay: 0.1s;
}

.explore-btn {
  display: flex;
  align-items: center;
  justify-content: center; /* Căn giữa nội dung */
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-3);
  background-color: rgba(249, 250, 251, 0.8);
  color: var(--primary);
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
  overflow: visible; /* Đảm bảo nội dung không bị cắt */
  border: 1px solid rgba(99, 102, 241, 0.15);
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  white-space: nowrap; /* Ngăn chặn việc xuống dòng */
  min-width: 110px; /* Độ rộng tối thiểu phù hợp */
  flex-shrink: 0; /* Không cho phép nút co lại */
}

/* CSS riêng cho btn-text để đảm bảo hiển thị đầy đủ */
.explore-btn .btn-text {
  display: inline-block;
  overflow: visible;
  white-space: nowrap;
  text-overflow: clip;
  width: auto;
}


.explore-btn:hover {
  color: var(--white);
  transform: translateX(3px);
  box-shadow: 0 5px 15px rgba(67, 97, 238, 0.25);
  border-color: transparent;
}



.explore-btn i {
  transition: transform 0.3s ease;
}

.explore-btn:hover i {
  transform: translateX(3px);
}

.explore-btn i {
  transition: var(--transition-fast);
}

.explore-btn:hover i {
  transform: translateX(3px);
}

.view-all-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--radius);
  margin: 0 auto;
  transition: var(--transition-normal);
  box-shadow: 0 8px 20px rgba(67, 97, 238, 0.2);
  max-width: 300px;
}

.view-all-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(67, 97, 238, 0.3);
}

.view-all-btn i {
  transition: var(--transition-fast);
}

.view-all-btn:hover i {
  transform: translateX(5px);
}

/* Responsive styles */
@media (max-width: 992px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .category-filters {
    gap: var(--spacing-2);
  }
}

@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .category-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: var(--spacing-3);
    margin-bottom: var(--spacing-8);
  }
  
  .category-pill {
    white-space: nowrap;
  }
  
  .section-icon {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
  
  .categories .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 576px) {
  .card-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-3);
  }
  
  .category-badge {
    position: absolute;
    top: var(--spacing-3);
    right: var(--spacing-3);
  }
  
  .category-content {
    text-align: center;
  }
  
  .category-tags {
    justify-content: center;
  }
  
  .category-footer {
    flex-direction: column;
    gap: var(--spacing-3);
  }
  
  .explore-btn {
    width: 100%;
    justify-content: center;
  }
}

.view-all-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: var(--white);
  font-weight: 600;
  font-size: 1rem;
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--radius);
  margin: 0 auto;
  transition: var(--transition-normal);
  box-shadow: 0 8px 20px rgba(67, 97, 238, 0.2);
  max-width: 300px;
}

.view-all-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(67, 97, 238, 0.3);
}

.view-all-btn i {
  transition: var(--transition-fast);
}

.view-all-btn:hover i {
  transform: translateX(5px);
}

/* Responsive styles */
@media (max-width: 992px) {
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .category-filters {
    gap: var(--spacing-2);
  }
}

@media (max-width: 768px) {
  .categories-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .category-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: var(--spacing-3);
    margin-bottom: var(--spacing-8);
  }
  
  .category-pill {
    white-space: nowrap;
  }
  
  .section-icon {
    width: 50px;
    height: 50px;
    font-size: 20px;
  }
  
  .categories .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 576px) {
  .card-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-3);
  }
  
  .category-badge {
    position: absolute;
    top: var(--spacing-3);
    right: var(--spacing-3);
  }
  
  .category-content {
    text-align: center;
  }
  
  .category-tags {
    justify-content: center;
  }
  
  .category-footer {
    flex-direction: column;
    gap: var(--spacing-3);
  }
  
  .explore-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Error message styles */
.categories-error {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
  padding: var(--spacing-8);
}

.error-message {
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.error-message i {
  font-size: 2rem;
  color: #fbbf24;
  margin-bottom: var(--spacing-4);
}

.error-message p {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-6);
  opacity: 0.9;
}

.retry-btn {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: var(--white);
  border: none;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
}

.retry-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}