/* ================================
   SIDEBAR SKILLS SECTION
   ================================ */

.sidebar-skills {
  margin: var(--space-6) 0;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

/* Skills Section Titles */
.skills-section-title {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  text-align: center;
}

.skills-section-subtitle {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  text-align: center;
}

/* Tier 1: Core Skills */
.skills-tier-core {
  margin-bottom: var(--space-4);
}

.core-skills-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.core-skill-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-color);
  transition: all 0.2s ease;
  cursor: default;
}

.core-skill-item:hover {
  background: white;
  box-shadow: var(--shadow-sm);
  transform: translateX(2px);
}

.skill-icon-large {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-xs);
}

.skill-icon-large img {
  width: 24px;
  height: 24px;
}

.skill-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.skill-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.skill-sub {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: var(--font-normal);
}

.skill-level {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skill-level.expert {
  background: #10b981;
}

.skill-level.advanced {
  background: #3b82f6;
}

.skill-level.intermediate {
  background: #8b5cf6;
}

/* Tier 2: Secondary Skills */
.skills-tier-secondary {
  margin-bottom: var(--space-3);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  justify-content: center;
}

.skill-tag {
  padding: 4px var(--space-2);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

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

/* Tier 3: View All Button */
.skills-tier-expand {
  text-align: center;
}

.view-all-skills-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--space-2);
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.view-all-skills-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, var(--primary-hover), var(--accent-hover));
}

.btn-text {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* ================================
   TECH STACK MODAL
   ================================ */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal:not([hidden]) {
  opacity: 1;
}

.modal-content {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 800px;
  width: 90%;
  max-height: 80vh;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal:not([hidden]) .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-base);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
  max-height: 60vh;
  overflow-y: auto;
}

/* Tech Stack Workflow in Modal */
.tech-stack-workflow {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.tech-category {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border-left: 4px solid var(--primary-color);
}

.category-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.category-number {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  flex-shrink: 0;
}

.tech-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.tech-skill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: white;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  transition: all 0.2s ease;
  cursor: default;
}

.tech-skill:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.tech-skill.expert {
  border-left: 4px solid #10b981;
}

.tech-skill.advanced {
  border-left: 4px solid #3b82f6;
}

.tech-skill.intermediate {
  border-left: 4px solid #8b5cf6;
}

.tech-skill img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.tech-skill span {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.tech-skill .skill-sub {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: var(--font-normal);
  margin-left: var(--space-1);
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */

/* Tablet: 768px - 1023px */
@media (max-width: 1023px) {
  .sidebar-skills {
    margin: var(--space-6) 0;
    padding: var(--space-4) 0;
  }
  
  .core-skill-item {
    padding: var(--space-2);
    gap: var(--space-2);
  }
  
  .skill-icon-large {
    width: 28px;
    height: 28px;
  }
  
  .skill-icon-large img {
    width: 20px;
    height: 20px;
  }
  
  .skill-name {
    font-size: var(--text-xs);
  }
  
  .skill-sub {
    font-size: 10px;
  }
  
  .skill-tags {
    gap: var(--space-1);
  }
  
  .skill-tag {
    padding: 4px var(--space-1);
    font-size: var(--text-xs);
  }
  
  .view-all-skills-btn {
    padding: var(--space-2);
  }
  
  .btn-text {
    font-size: var(--text-xs);
  }
  
  .skill-count {
    font-size: 10px;
  }
}

/* Mobile: < 768px */
@media (max-width: 767px) {
  .sidebar-skills {
    margin: var(--space-4) 0;
    padding: var(--space-3) 0;
  }
  
  .skills-section-title {
    font-size: var(--text-base);
    margin-bottom: var(--space-3);
  }
  
  .core-skills-list {
    gap: var(--space-2);
  }
  
  .core-skill-item {
    padding: var(--space-2);
    gap: var(--space-2);
  }
  
  .skill-icon-large {
    width: 24px;
    height: 24px;
  }
  
  .skill-icon-large img {
    width: 18px;
    height: 18px;
  }
  
  .skill-name {
    font-size: var(--text-xs);
  }
  
  .skill-sub {
    display: none; /* Hide sub-skills on mobile for space */
  }
  
  .skill-tags {
    gap: 4px;
  }
  
  .skill-tag {
    padding: 4px var(--space-1);
    font-size: var(--text-xs);
  }
  
  .view-all-skills-btn {
    padding: var(--space-2);
  }
  
  .btn-text {
    font-size: var(--text-xs);
  }
  
  .skill-count {
    font-size: 9px;
  }
  
  /* Modal adjustments for mobile */
  .modal-content {
    width: 95%;
    max-height: 90vh;
  }
  
  .modal-header {
    padding: var(--space-4);
  }
  
  .modal-title {
    font-size: var(--text-lg);
  }
  
  .modal-body {
    padding: var(--space-4);
    max-height: 70vh;
  }
  
  .tech-category {
    padding: var(--space-4);
  }
  
  .category-title {
    font-size: var(--text-base);
    margin-bottom: var(--space-3);
  }
  
  .category-number {
    width: 28px;
    height: 28px;
    font-size: var(--text-xs);
  }
  
  .tech-skills {
    gap: var(--space-2);
  }
  
  .tech-skill {
    padding: var(--space-1) var(--space-2);
  }
  
  .tech-skill img {
    width: 18px;
    height: 18px;
  }
  
  .tech-skill span {
    font-size: var(--text-xs);
  }
}

/* ================================
   ACCESSIBILITY & FOCUS STATES
   ================================ */

.view-all-skills-btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.modal-close:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.core-skill-item:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .core-skill-item,
  .skill-tag,
  .view-all-skills-btn,
  .tech-skill,
  .modal,
  .modal-content {
    transition: none;
  }
}