/* FILE: css/leetcode.css - Card-based with Search */

/* Hero Section */
.leetcode-hero-icon {
  width: 350px;
  height: 350px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  border: 5px solid rgba(255, 255, 255, 0.05);
  position: relative;
  z-index: 2;
  transition: all var(--transition-slow);
}

/* FORCE DIFFICULTY COLORS - MUST BE AT END */
.difficulty-badge.easy,
.problem-card-header .difficulty-badge.easy,
.modal-title .difficulty-badge.easy,
span.difficulty-badge.easy {
  background: rgba(34, 197, 94, 0.2) !important;
  color: #22c55e !important;
  border: 1px solid rgba(34, 197, 94, 0.3) !important;
}

.difficulty-badge.medium,
.problem-card-header .difficulty-badge.medium,
.modal-title .difficulty-badge.medium,
span.difficulty-badge.medium {
  background: rgba(249, 115, 22, 0.2) !important;
  color: #f97316 !important;
  border: 1px solid rgba(249, 115, 22, 0.3) !important;
}

.difficulty-badge.hard,
.problem-card-header .difficulty-badge.hard,
.modal-title .difficulty-badge.hard,
span.difficulty-badge.hard {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #ef4444 !important;
  border: 1px solid rgba(239, 68, 68, 0.3) !important;
}

.leetcode-hero-icon i {
  font-size: 8rem;
  color: white;
  animation: pulse 2s ease-in-out infinite;
}

.hero-image-container:hover .leetcode-hero-icon {
  transform: translateY(-10px);
  box-shadow: 0 30px 50px rgba(67, 97, 238, 0.3);
}

/* Search and Filters */
.search-container .input-group {
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.search-container .form-control {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  height: 48px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  padding-left: 20px;
}

.search-container .form-control:focus {
  background-color: var(--bg-card);
  border-color: var(--primary);
  box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.25);
  color: var(--text-light);
}

.search-container .btn-primary {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  height: 48px;
  padding: 0 20px;
}

.filter-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.btn-filter {
  background: transparent;
  color: var(--text-muted);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  font-weight: 500;
}

.btn-filter:hover,
.btn-filter.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  transform: translateY(-2px);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

/* Problems Grid */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 25px;
  margin-top: var(--space-lg);
}

.problem-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(67, 97, 238, 0.3);
}

.problem-card-header {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.problem-number {
  position: absolute;
  top: 15px;
  right: 15px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
}

.problem-card-title {
  font-size: 1.2rem;
  margin-bottom: var(--space-xs);
  color: var(--text-light);
  padding-right: 60px;
  line-height: 1.4;
  font-weight: 600;
}

.difficulty-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Difficulty badge colors - with higher specificity */
.problem-card-header .difficulty-badge.easy,
.modal-title .difficulty-badge.easy {
  background: rgba(34, 197, 94, 0.2) !important;
  color: #22c55e !important;
  border: 1px solid rgba(34, 197, 94, 0.3) !important;
}

.problem-card-header .difficulty-badge.medium,
.modal-title .difficulty-badge.medium {
  background: rgba(249, 115, 22, 0.2) !important;
  color: #f97316 !important;
  border: 1px solid rgba(249, 115, 22, 0.3) !important;
}

.problem-card-header .difficulty-badge.hard,
.modal-title .difficulty-badge.hard {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #ef4444 !important;
  border: 1px solid rgba(239, 68, 68, 0.3) !important;
}

.problem-card-body {
  padding: var(--space-md);
}

.problem-description {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.problem-card-footer {
  padding: 0 var(--space-md) var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.problem-date {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.view-solution {
  color: var(--secondary);
  font-weight: 600;
  position: relative;
  padding-bottom: 2px;
  transition: all var(--transition-normal);
}

.view-solution::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--secondary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.problem-card:hover .view-solution::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* No Results */
.no-results-container {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid var(--border-color);
  margin-top: var(--space-lg);
}

.no-results-container i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.no-results-container h4 {
  color: var(--text-light);
  margin-bottom: var(--space-sm);
}

.no-results-container p {
  color: var(--text-muted);
  margin: 0;
}

/* Modal Styles */
.modal-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(76, 201, 240, 0.1));
  padding: 1.5rem;
}

.modal-title {
  color: var(--text-light);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.modal-body {
  color: var(--text-muted);
  line-height: 1.7;
  max-height: 70vh;
  overflow-y: auto;
  padding: var(--space-lg);
}

.modal .close {
  color: var(--text-light);
  opacity: 0.8;
  transition: all var(--transition-fast);
  text-shadow: none;
}

.modal .close:hover {
  color: var(--primary-light);
  opacity: 1;
}

/* Solution Sections */
.solution-section,
.insight-section,
.improvement-section {
  margin-bottom: var(--space-lg);
}

.solution-section {
  margin-top: var(--space-lg);
}

.solution-section h4,
.insight-section h4,
.improvement-section h4 {
  color: var(--text-light);
  font-size: 1.3rem;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: 10px;
}

.solution-section h4 i {
  color: var(--primary-light);
}

.insight-section h4 i {
  color: #f39c12;
}

.improvement-section h4 i {
  color: #27ae60;
}

/* Code Block */
.code-block {
  background: #1e1e1e;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-md) 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-sm);
}

.code-header {
  background: #2d2d2d;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.code-language {
  color: var(--primary-light);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.copy-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 5px;
}

.copy-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: translateY(-1px);
}

.code-content {
  padding: 20px;
  overflow-x: auto;
}

.code-content pre {
  margin: 0;
  background: transparent;
  border: none;
  padding: 0;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

.code-content code {
  background: transparent;
  color: #f8f8f2;
  padding: 0;
  font-family: inherit;
}

/* Insight and Improvement Sections */
.insight-section,
.improvement-section {
  background: rgba(255, 255, 255, 0.02);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
}

.insight-section {
  border-left-color: #f39c12;
  background: linear-gradient(135deg, rgba(243, 156, 18, 0.05), rgba(243, 156, 18, 0.02));
}

.improvement-section {
  border-left-color: #27ae60;
  background: linear-gradient(135deg, rgba(39, 174, 96, 0.05), rgba(39, 174, 96, 0.02));
}

.insight-section p,
.improvement-section p {
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.improvement-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.improvement-section li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  color: var(--text-muted);
  line-height: 1.6;
}

.improvement-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 8px;
  color: #27ae60;
  font-weight: bold;
  font-size: 1.1rem;
}

.improvement-section li strong {
  color: var(--text-light);
}

/* Footer Adjustments */
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: 5px 0;
}

.footer-link:hover {
  color: var(--secondary);
  padding-left: 10px;
}

/* Responsive Design */
@media (max-width: 767.98px) {
  .problems-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .problem-card-title {
    font-size: 1.1rem;
    padding-right: 50px;
  }
  
  .problem-number {
    padding: 3px 8px;
    font-size: 0.75rem;
  }
  
  .filter-container {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 10px;
  }
  
  .btn-filter {
    white-space: nowrap;
    flex-shrink: 0;
  }
  
  .leetcode-hero-icon {
    width: 250px;
    height: 250px;
  }
  
  .leetcode-hero-icon i {
    font-size: 5rem;
  }
  
  .modal-body {
    padding: var(--space-md);
    max-height: 60vh;
  }
  
  .modal-title {
    font-size: 1.3rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (max-width: 575.98px) {
  .problem-card-header,
  .problem-card-body {
    padding: var(--space-sm);
  }
  
  .problem-card-footer {
    padding: 0 var(--space-sm) var(--space-sm);
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .code-header {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }
  
  .copy-btn {
    align-self: flex-end;
    padding: 4px 8px;
    font-size: 0.75rem;
  }
  
  .insight-section,
  .improvement-section {
    padding: var(--space-sm);
  }
}