/* ================================
  Skills Page Styles
================================ */

/* Hero Section */
.skills-hero {
  background-image: url('/static/images/backgrounds/skills-hero.jpg');
}

/* Skills Section */
.skills-section {
  padding: var(--space-xl) 0;
}

.skills-container {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

/* ================================
   Core Competencies (Featured Skills)
================================ */
.featured-skills-section {
  padding: var(--space-2xl);
  background: linear-gradient(135deg, rgb(var(--accent-primary-rgb), 0.06) 0%, rgb(var(--accent-primary-rgb), 0.02) 100%);
  border: 1px solid rgb(var(--accent-primary-rgb), 0.15);
  border-radius: var(--radius-xl);
  animation: fade-in var(--duration-slow) var(--ease-out);
  margin-bottom: var(--space-sm);
}

.featured-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.featured-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  display: inline-block;
}

.featured-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-primary-gradient);
  border-radius: 2px;
}

.featured-subtitle {
  font-size: var(--text-base);
  color: var(--fg-muted);
  font-weight: var(--font-medium);
  margin-top: var(--space-md);
}

.featured-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.featured-skill-card {
  animation: fade-in var(--duration-normal) var(--ease-out) both;
}

.skill-card-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xl) var(--space-lg);
  background: linear-gradient(
    135deg,
    rgb(234 88 12 / 8%) 0%,
    rgb(255 255 255 / 3%) 50%,
    rgb(234 88 12 / 5%) 100%
  );
  border: 1px solid rgb(255 255 255 / 8%);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  min-height: 220px;
  overflow: hidden;
}


.skill-card-link[href] {
  cursor: pointer;
}

.skill-card-link[href]:hover {
  transform: translateY(-6px);
  background: linear-gradient(
    135deg,
    rgb(234 88 12 / 12%) 0%,
    rgb(255 255 255 / 6%) 50%,
    rgb(234 88 12 / 8%) 100%
  );
  border-color: rgb(var(--accent-primary-rgb), 0.6);
  box-shadow:
    0 12px 32px rgb(0 0 0 / 40%),
    0 0 32px rgb(var(--accent-primary-rgb), 0.25),
    inset 0 0 20px rgb(var(--accent-primary-rgb), 0.15);
}


.skill-card-link.skill-card-static {
  opacity: 0.8;
}

.skill-card-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.skill-card-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgb(0 0 0 / 30%));
  transition: transform var(--duration-fast) var(--ease-out);
}

.skill-card-icon svg {
  width: 48px;
  height: 48px;
}

.skill-card-content {
  text-align: center;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

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

.skill-card-desc {
  font-size: var(--text-xs);
  color: var(--fg-muted);
  line-height: var(--leading-normal);
  margin-top: 2px;
}

/* Category Tags on Featured Cards */
.category-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1px solid;
  margin-top: 2px;
}

/* Category tag color variants */
.category-tag-languages-scripting {
  background: rgb(245 158 11 / 12%);
  color: #f59e0b;
  border-color: rgb(245 158 11 / 25%);
}

.category-tag-cloud-platforms {
  background: rgb(59 130 246 / 12%);
  color: #3b82f6;
  border-color: rgb(59 130 246 / 25%);
}

.category-tag-security-identity {
  background: rgb(239 68 68 / 12%);
  color: #ef4444;
  border-color: rgb(239 68 68 / 25%);
}

.category-tag-containers-orchestration {
  background: rgb(6 182 212 / 12%);
  color: #06b6d4;
  border-color: rgb(6 182 212 / 25%);
}

.category-tag-cicd-automation {
  background: rgb(168 85 247 / 12%);
  color: #a855f7;
  border-color: rgb(168 85 247 / 25%);
}

.category-tag-infrastructure-as-code {
  background: rgb(34 197 94 / 12%);
  color: #22c55e;
  border-color: rgb(34 197 94 / 25%);
}

.category-tag-development-tools {
  background: rgb(249 115 22 / 12%);
  color: #f97316;
  border-color: rgb(249 115 22 / 25%);
}

.category-tag-operating-systems {
  background: rgb(236 72 153 / 12%);
  color: #ec4899;
  border-color: rgb(236 72 153 / 25%);
}

.skill-proficiency {
  display: flex;
  justify-content: center;
  margin-top: var(--space-xs);
}

.proficiency-badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.proficiency-sm {
  font-size: 0.6rem;
  padding: 2px 8px;
}

.proficiency-expert {
  background: rgb(34 197 94 / 15%);
  color: rgb(34 197 94);
  border: 1px solid rgb(34 197 94 / 30%);
}

.proficiency-advanced {
  background: rgb(59 130 246 / 15%);
  color: rgb(59 130 246);
  border: 1px solid rgb(59 130 246 / 30%);
}

.proficiency-intermediate {
  background: rgb(251 146 60 / 15%);
  color: rgb(251 146 60);
  border: 1px solid rgb(251 146 60 / 30%);
}

.proficiency-familiar {
  background: rgb(156 163 175 / 15%);
  color: rgb(156 163 175);
  border: 1px solid rgb(156 163 175 / 30%);
}

.external-link-icon {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--fg-muted);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.skill-card-link[href]:hover .external-link-icon {
  opacity: 1;
}

/* ================================
   Concepts & Practices Section
================================ */
.concepts-section {
  padding: var(--space-2xl);
  background: linear-gradient(135deg, rgb(var(--accent-secondary-rgb), 0.06) 0%, rgb(var(--accent-secondary-rgb), 0.02) 100%);
  border: 1px solid rgb(var(--accent-secondary-rgb), 0.15);
  border-radius: var(--radius-xl);
  animation: fade-in var(--duration-slow) var(--ease-out);
  margin-bottom: var(--space-sm);
}

.concepts-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.concepts-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  display: inline-block;
}

.concepts-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(135deg, var(--accent-secondary) 0%, #2dd4bf 100%);
  border-radius: 2px;
}

.concepts-subtitle {
  font-size: var(--text-base);
  color: var(--fg-muted);
  font-weight: var(--font-medium);
  margin-top: var(--space-md);
}

.concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.concept-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(
    135deg,
    rgb(13 148 136 / 10%) 0%,
    rgb(255 255 255 / 3%) 100%
  );
  text-decoration: none;
  color: inherit;
  animation: fade-in var(--duration-normal) var(--ease-out) both;
}


.concept-card:hover {
  transform: translateY(-4px);
  background: linear-gradient(
    135deg,
    rgb(13 148 136 / 15%) 0%,
    rgb(255 255 255 / 8%) 100%
  );
  border-color: rgb(var(--accent-secondary-rgb), 0.5);
  box-shadow:
    0 12px 32px rgb(0 0 0 / 40%),
    0 0 24px rgb(var(--accent-secondary-rgb), 0.25),
    inset 0 0 16px rgb(var(--accent-secondary-rgb), 0.12);
}


.concept-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.concept-icon svg {
  width: 32px;
  height: 32px;
}

.concept-icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.concept-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 0;
}

.concept-name {
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--fg-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.concept-arrow {
  color: var(--fg-muted);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
  font-size: var(--text-sm);
}

.concept-card:hover .concept-arrow {
  opacity: 1;
}

/* ================================
   Filter Bar
================================ */
.skills-filter-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, rgb(var(--accent-secondary-rgb), 0.06) 0%, rgb(var(--accent-secondary-rgb), 0.02) 100%);
  border: 1px solid rgb(var(--accent-secondary-rgb), 0.15);
  animation: fade-in var(--duration-slow) var(--ease-out);
}

.filter-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.filter-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding-top: 8px;
  min-width: 80px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-tab {
  appearance: none;
  border: 1px solid var(--border-color-strong);
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.filter-tab:hover {
  color: var(--fg-primary);
  background: linear-gradient(
    135deg,
    rgb(234 88 12 / 12%) 0%,
    rgb(255 255 255 / 8%) 100%
  );
  border-color: rgb(var(--accent-primary-rgb), 0.3);
  box-shadow:
    0 2px 8px rgb(234 88 12 / 15%),
    inset 0 0 12px rgb(234 88 12 / 8%);
}

.filter-tab.active {
  background: rgb(var(--accent-primary-rgb), 0.15);
  color: var(--fg-accent);
  border-color: rgb(var(--accent-primary-rgb), 0.4);
  font-weight: var(--font-semibold);
}

.filter-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.filter-dot.level-expert { background: rgb(34 197 94); }
.filter-dot.level-advanced { background: rgb(59 130 246); }
.filter-dot.level-intermediate { background: rgb(251 146 60); }
.filter-dot.level-familiar { background: rgb(156 163 175); }

/* ================================
   All Technical Skills Grid
================================ */
.all-skills-section {
  padding: var(--space-2xl);
  background: linear-gradient(135deg, rgb(var(--accent-primary-rgb), 0.06) 0%, rgb(var(--accent-primary-rgb), 0.02) 100%);
  border: 1px solid rgb(var(--accent-primary-rgb), 0.15);
  border-radius: var(--radius-xl);
  animation: fade-in var(--duration-slow) var(--ease-out);
}

.all-skills-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.all-skills-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  display: inline-block;
}

.all-skills-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--accent-primary-gradient);
  border-radius: 2px;
}

.all-skills-subtitle {
  font-size: var(--text-base);
  color: var(--fg-muted);
  font-weight: var(--font-medium);
  margin-top: var(--space-md);
}


.skill-category {
  animation: fade-in var(--duration-slow) var(--ease-out) both;
}

.category-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-xl);
  color: var(--fg-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-left: var(--space-md);
  border-left: 3px solid var(--accent-primary);
}

/* Icon-only grid layout */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: flex-start;
}

/* Skill icon button */
.skill-icon-btn {
  position: relative;
  width: 100px;
  height: 100px;
  padding: var(--space-md);
  background: linear-gradient(
    135deg,
    rgb(234 88 12 / 8%) 0%,
    rgb(255 255 255 / 3%) 50%,
    rgb(234 88 12 / 5%) 100%
  );
  border: 1px solid rgb(255 255 255 / 8%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
  animation: fade-in var(--duration-normal) var(--ease-out) both;
  appearance: none;
  font: inherit;
  color: inherit;
}

.skill-icon-btn:hover {
  transform: translateY(-4px) scale(1.08);
  background: linear-gradient(
    135deg,
    rgb(234 88 12 / 15%) 0%,
    rgb(249 115 22 / 10%) 50%,
    rgb(234 88 12 / 12%) 100%
  );
  border-color: rgb(var(--accent-primary-rgb), 0.6);
  box-shadow:
    0 12px 32px rgb(0 0 0 / 40%),
    0 0 28px rgb(var(--accent-primary-rgb), 0.3),
    inset 0 0 20px rgb(var(--accent-primary-rgb), 0.15);
}

/* Icon styling */
.skill-icon-btn img {
  width: 75px;
  height: 75px;
  object-fit: contain;
  transition: transform var(--duration-fast) var(--ease-out), filter var(--duration-fast) var(--ease-out);
  filter: drop-shadow(0 1px 2px rgb(0 0 0 / 30%));
}

/* Dark icons need inversion for visibility */
.skill-icon-btn[data-tooltip="GitHub"] img,
.skill-icon-btn[data-tooltip="GitHub Codespaces"] img,
.skill-icon-btn[data-tooltip="Bash"] img,
.skill-icon-btn[data-tooltip="Markdown"] img,
.skill-icon-btn[data-tooltip="SSH"] img,
.skill-icon-btn[data-tooltip="Splunk"] img,
.skill-icon-btn[data-tooltip="SQL Server"] img,
.skill-icon-btn[data-tooltip="CircleCI"] img,
.skill-icon-btn[data-tooltip="Flask"] img {
  filter: invert(1) drop-shadow(0 1px 2px rgb(0 0 0 / 30%));
}

.skill-icon-btn:hover img {
  transform: scale(1.08);
}

/* Inline SVG icons */
.skill-icon-btn svg {
  width: 40px;
  height: 40px;
}

/* Proficiency Indicator Dot */
.skill-level-dot {
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid rgb(28 25 23 / 80%);
}

.skill-level-dot.level-expert {
  background: rgb(34 197 94);
  box-shadow: 0 0 8px rgb(34 197 94 / 50%);
}

.skill-level-dot.level-advanced {
  background: rgb(59 130 246);
  box-shadow: 0 0 8px rgb(59 130 246 / 50%);
}

.skill-level-dot.level-intermediate {
  background: rgb(251 146 60);
  box-shadow: 0 0 8px rgb(251 146 60 / 50%);
}

.skill-level-dot.level-familiar {
  background: rgb(156 163 175);
  box-shadow: 0 0 8px rgb(156 163 175 / 50%);
}

/* CSS Tooltip */
.skill-icon-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: var(--space-xs) var(--space-sm);
  background: rgb(30 30 30 / 95%);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 10;
  pointer-events: none;
}

.skill-icon-btn::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  border: 6px solid transparent;
  border-top-color: rgb(30 30 30 / 95%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-out);
  z-index: 10;
}

.skill-icon-btn:hover::after,
.skill-icon-btn:focus::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.skill-icon-btn:hover::before,
.skill-icon-btn:focus::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Focus state for accessibility */
.skill-icon-btn:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.skill-icon-btn:focus:not(:focus-visible) {
  outline: none;
}

/* ================================
   Skill Detail Panel
================================ */
.skill-detail-slot {
  overflow: hidden;
}

.skill-detail-card {
  margin-top: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color-strong);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  position: relative;
  animation: fade-slide-down 0.3s ease-out;
}

@keyframes fade-slide-down {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.skill-detail-close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  font-size: var(--text-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  appearance: none;
  font-family: var(--font-sans);
  line-height: 1;
}

.skill-detail-close:hover {
  background: rgb(255 255 255 / 8%);
  color: var(--fg-primary);
  border-color: rgb(255 255 255 / 20%);
}

.skill-detail-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xl);
}

.skill-detail-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.skill-detail-card .skill-detail-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgb(0 0 0 / 30%));
}

.skill-card-link:hover .skill-card-icon img {
  transform: scale(1.1);
}

/* Dark icon inversion in detail panel */
.skill-detail-icon img[alt="GitHub"],
.skill-detail-icon img[alt="GitHub Codespaces"],
.skill-detail-icon img[alt="Bash"],
.skill-detail-icon img[alt="Markdown"],
.skill-detail-icon img[alt="Splunk"],
.skill-detail-icon img[alt="SQL Server"] {
  filter: invert(1) drop-shadow(0 2px 4px rgb(0 0 0 / 30%));
}

.skill-detail-icon svg {
  width: 48px;
  height: 48px;
}

.skill-detail-info {
  flex: 1;
  min-width: 0;
}

.skill-detail-name {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--fg-primary);
  margin-bottom: var(--space-xs);
}

.skill-detail-category {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1px solid;
  margin-bottom: var(--space-sm);
}

.skill-detail-proficiency {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.proficiency-bar {
  flex: 1;
  max-width: 200px;
  height: 6px;
  background: rgb(255 255 255 / 8%);
  border-radius: 3px;
  overflow: hidden;
}

.proficiency-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease-out;
}

.proficiency-fill-expert {
  width: 100%;
  background: rgb(34 197 94);
}

.proficiency-fill-advanced {
  width: 75%;
  background: rgb(59 130 246);
}

.proficiency-fill-intermediate {
  width: 50%;
  background: rgb(251 146 60);
}

.proficiency-fill-familiar {
  width: 25%;
  background: rgb(156 163 175);
}

.skill-detail-desc {
  font-size: var(--text-sm);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-sm);
}

.skill-detail-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--fg-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.skill-detail-link:hover {
  color: var(--accent-primary);
}

.skill-detail-link .link-arrow {
  transition: transform var(--duration-fast) var(--ease-out);
}

.skill-detail-link:hover .link-arrow {
  transform: translate(2px, -2px);
}

/* ================================
   Skeleton Loading States
================================ */
.skeleton-section {
  pointer-events: none;
}

.skeleton-featured-title {
  height: 28px;
  width: 250px;
  margin: 0 auto var(--space-sm);
}

.skeleton-featured-subtitle {
  height: 16px;
  width: 300px;
  margin: 0 auto;
}

.skeleton-featured-card {
  height: 220px;
  border-radius: var(--radius-lg);
}

.skeleton-concepts-title {
  height: 28px;
  width: 220px;
  margin: 0 auto;
}

.skeleton-concept-card {
  height: 64px;
  border-radius: var(--radius-lg);
}

.skeleton-all-skills-bar {
  height: 120px;
  width: 100%;
  border-radius: var(--radius-lg);
}

.skeleton-category .skills-grid {
  margin-top: var(--space-lg);
}

.skeleton-category-title {
  height: 20px;
  width: 180px;
  margin-bottom: var(--space-xl);
}

.skeleton-badge {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
}

/* ================================
   Responsive Design
================================ */
@media (width <= 1024px) {
  .featured-skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .concepts-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .filter-group {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .filter-label {
    padding-top: 0;
    min-width: auto;
  }
}

@media (width <= 768px) {
  .featured-skills-section,
  .concepts-section {
    padding: var(--space-xl);
  }

  .featured-skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
  }

  .concepts-grid {
    grid-template-columns: 1fr;
  }

  .concept-card {
    align-items: flex-start;
  }

  .skill-card-icon {
    width: 56px;
    height: 56px;
  }

  .skill-card-icon img {
    width: 44px;
    height: 44px;
  }

  .skill-card-link {
    min-height: 0;
    padding: var(--space-lg) var(--space-md);
  }

  .skill-card-desc {
    display: none;
  }

  .skills-grid {
    gap: var(--space-md);
    justify-content: center;
  }

  .skill-icon-btn {
    width: 64px;
    height: 64px;
    padding: var(--space-sm);
  }

  .skill-icon-btn img {
    width: 40px;
    height: 40px;
  }

  .skill-icon-btn svg {
    width: 32px;
    height: 32px;
  }

  .skills-filter-bar {
    padding: var(--space-md);
  }

  .filter-tabs {
    gap: 4px;
  }

  .filter-tab {
    font-size: 0.65rem;
    padding: 5px 10px;
  }

  .skill-detail-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .skill-detail-proficiency {
    justify-content: center;
  }

  .concept-icon {
    width: 36px;
    height: 36px;
  }

  .concept-icon svg {
    width: 24px;
    height: 24px;
  }

  .concept-name {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    line-height: 1.35;
  }

  .category-title {
    font-size: var(--text-base);
  }
}

@media (width <= 480px) {
  .featured-skills-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
  }

  .skill-icon-btn {
    width: 56px;
    height: 56px;
  }

  .skill-icon-btn img {
    width: 36px;
    height: 36px;
  }

  .skill-icon-btn svg {
    width: 28px;
    height: 28px;
  }

  .category-title {
    font-size: var(--text-sm);
  }
}