/**
 * Skills Page Styles
 * ==================
 * Styles specific to the skills/technical proficiency page.
 */

/* ===========================================
   PAGE HEADER
   =========================================== */

.skills-header {
  padding: var(--space-32) 0 var(--space-12);
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

/* ===========================================
   SKILL CATEGORIES GRID
   =========================================== */

.skills-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===========================================
   SKILL CATEGORY CARD
   =========================================== */

.skill-category {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition:
    border-color var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.skill-category:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.skill-category__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.skill-category__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-info-bg);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.skill-category__icon svg {
  width: 20px;
  height: 20px;
}

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

.skill-category__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.skill-item:last-child {
  border-bottom: none;
}

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

.skill-item__level {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.skill-item__years {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

/* ===========================================
   PROFICIENCY BARS
   =========================================== */

.proficiency-section {
  margin-top: var(--space-16);
}

.proficiency-group {
  margin-bottom: var(--space-8);
}

.proficiency-group__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-4);
}

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

.proficiency-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.proficiency-item__name {
  width: 120px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.proficiency-item__bar {
  flex: 1;
  height: 8px;
  background: var(--color-bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.proficiency-item__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-600), var(--color-accent-400));
  border-radius: var(--radius-full);
  transition: width 1s var(--ease-out);
}

.proficiency-item__years {
  width: 60px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-align: right;
}

/* ===========================================
   SKILL VISUALIZATION PLACEHOLDER
   =========================================== */

.skill-viz {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-12);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.skill-viz__placeholder {
  text-align: center;
  color: var(--color-text-tertiary);
}

.skill-viz__placeholder-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  opacity: 0.5;
}

.skill-viz__placeholder-text {
  font-size: var(--text-sm);
}

/* D3 Skill Tree Styles */
.skill-tree {
  width: 100%;
  height: 100%;
}

.skill-tree .node circle {
  cursor: pointer;
  transition: r 0.2s ease;
}

.skill-tree .node circle:hover {
  r: 12;
}

.skill-tree .node text {
  font-size: 11px;
  fill: var(--color-text-secondary);
  pointer-events: none;
}

.skill-tree .link {
  fill: none;
  stroke: var(--color-border-default);
  stroke-width: 1.5;
}

/* ===========================================
   TECH STACK SUMMARY
   =========================================== */

.tech-stack-summary {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-12);
}

@media (min-width: 768px) {
  .tech-stack-summary {
    grid-template-columns: repeat(4, 1fr);
  }
}

.tech-summary-card {
  background: var(--color-bg-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.tech-summary-card__number {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-accent-light);
  margin-bottom: var(--space-1);
}

.tech-summary-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}