/**
 * Lydia Sierra — Personal Developer Portfolio
 * Experience & Education Stylesheet
 * Conforming to DESIGN_SPEC.md & Visual Mockup
 */

/* ==========================================================================
   Experience & Education Panel
   ========================================================================== */
.experience-section {
  position: relative;
  padding-block: 0;
}

.experience-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--panel-padding);
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.experience-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--heading-gap);
}

.experience-header-bar .section-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-text-main);
  line-height: 1.2;
}

/* ==========================================================================
   2-Column Journey Grid (Work Experience vs Education)
   ========================================================================== */
.journey-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 1rem + 1.5vw, 2.75rem);
  margin-bottom: var(--heading-gap);
}

.journey-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Column Header with Icon & Type Badge */
.column-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border-subtle);
}

.column-icon-wrapper {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background-color: rgba(74, 93, 78, 0.12);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

[data-theme="dark"] .column-icon-wrapper {
  background-color: rgba(110, 142, 116, 0.2);
  color: var(--color-primary);
}

.journey-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text-main);
  margin: 0;
  line-height: 1.25;
}

.journey-type-badge {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-left: auto;
}

.journey-type--work {
  background-color: rgba(74, 93, 78, 0.12);
  color: var(--color-primary);
}

.journey-type--edu {
  background-color: rgba(123, 203, 196, 0.18);
  color: var(--color-turquoise-text);
}

[data-theme="dark"] .journey-type--work {
  background-color: rgba(110, 142, 116, 0.22);
  color: var(--color-primary);
}

[data-theme="dark"] .journey-type--edu {
  background-color: rgba(123, 203, 196, 0.22);
  color: var(--color-accent-turquoise);
}

/* ==========================================================================
   Connected Vertical Timeline
   ========================================================================== */
.timeline-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.5rem;
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Circular Node on Timeline */
.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.3rem;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-surface);
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.timeline-date {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.experience-tag {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
}

.timeline-role {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.35;
  margin: 0;
}

.timeline-company,
.education-institution {
  color: var(--color-primary);
  font-weight: 500;
}

.timeline-desc {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-top: 0.25rem;
}

/* Disclosed Core Technologies List */
.timeline-tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.35rem;
  list-style: none;
  padding: 0;
}

.timeline-tech-stack li {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-main);
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xs);
}

/* ==========================================================================
   Milestones / "By the numbers" Cards Block
   ========================================================================== */
.experience-milestones {
  padding-top: var(--heading-gap);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.milestones-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text-main);
  margin: 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(0.75rem, 0.5rem + 0.5vw, 1.25rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.metric-card {
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35rem;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.metric-card:hover {
  transform: translateY(-1px);
  border-color: var(--color-border);
}

.metric-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.metric-value {
  font-family: var(--font-body);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.2;
}

.metric-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 960px) {
  .journey-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
  }
}

@media (max-width: 580px) {
  .experience-panel {
    padding: 1.25rem;
    border-radius: var(--radius-lg);
  }

  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .timeline-list {
    padding-left: 1.2rem;
  }

  .timeline-item::before {
    left: -1.2rem;
  }
}