/* about.html styles */

/* Sections */
.about-section {
  padding: 6vh 0;
  border-bottom: 1px solid var(--border-color-alpha);
}

.about-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 450;
  color: var(--text-color);
  margin: 0 0 2rem;
}

/* Story */
.about-lead {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.7;
  color: var(--text-color);
  margin: 0 0 2.5rem;
  max-width: 640px;
}

.story-timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  padding-left: 2rem;
  border-left: 1px solid var(--border-color-alpha);
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.45rem;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-dark);
  border: 2px solid var(--background-color);
}

.timeline-year {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted-color);
  margin-bottom: 0.5rem;
}

.timeline-text {
  color: var(--text-muted-color);
  line-height: 1.7;
  font-size: 0.95rem;
  margin: 0;
}

.timeline-text strong {
  color: var(--text-color);
  font-weight: 500;
}

@media (max-width: 640px) {
  .story-timeline {
    padding-left: 1.5rem;
  }

  .timeline-item {
    padding-left: 1rem;
  }

  .timeline-item::before {
    left: -1.95rem;
    width: 6px;
    height: 6px;
  }
}

/* Skills */
.skills-list {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  column-gap: clamp(0.5rem, 1.5vw, 1.25rem);
  row-gap: clamp(1.25rem, 2.5vw, 2rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.skill {
  display: flex;
  min-width: 0;
}

.skill-icon {
  display: block;
  width: clamp(30px, 4vw, 38px);
  height: clamp(30px, 4vw, 38px);
  color: var(--clr-dark);
  opacity: 0.78;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.skill:hover .skill-icon {
  opacity: 1;
  transform: translateY(-4px);
}

@media (max-width: 1024px) {
  .skills-list {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .skills-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .skill-icon {
    transition: none;
  }

  .skill:hover .skill-icon {
    transform: none;
  }
}

/* Process — flowchart (circles joined by arrows) */
.process-flow {
  --flow-circle: clamp(56px, 7vw, 68px);
  --flow-gap: clamp(1.25rem, 3vw, 2.25rem);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: var(--flow-gap);
  row-gap: var(--flow-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.875rem;
  text-align: center;
}

.process-number {
  display: grid;
  place-items: center;
  width: var(--flow-circle);
  height: var(--flow-circle);
  border: 1px solid var(--border-color-alpha);
  border-radius: 50%;
  background: var(--container-bg-alpha);
  color: var(--text-muted-color);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  transition: var(--animation-fast);
}

.process-step:hover .process-number {
  border-color: var(--clr-dark);
  background: var(--clr-dark);
  color: var(--clr-white);
}

.process-title {
  font-size: 1.125rem;
  font-weight: 450;
  color: var(--text-color);
  margin: 0 0 0.5rem;
}

.process-desc {
  color: var(--text-muted-color);
  font-size: 0.8125rem;
  line-height: 1.6;
  margin: 0;
}

/* Arrow: line between circle centers, head just before the next circle */
.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: calc(var(--flow-circle) / 2);
  left: calc(50% + var(--flow-circle) / 2 + 10px);
  width: calc(100% - var(--flow-circle) - 20px + var(--flow-gap));
  height: 1px;
  background: var(--border-color-alpha);
}

.process-step:not(:last-child)::before {
  content: "";
  position: absolute;
  top: calc(var(--flow-circle) / 2 - 4px);
  left: calc(150% + var(--flow-gap) - var(--flow-circle) / 2 - 16px);
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--text-muted-color);
  opacity: 0.55;
}

@media (max-width: 640px) {
  .process-flow {
    --flow-gap: 2rem;
    grid-template-columns: 1fr;
  }

  .process-step {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 1rem;
    align-items: start;
    text-align: left;
  }

  .process-step:not(:last-child)::after {
    top: calc(var(--flow-circle) + 12px);
    left: calc(var(--flow-circle) / 2 - 0.5px);
    width: 1px;
    height: calc(100% + var(--flow-gap) - var(--flow-circle) - 28px);
  }

  .process-step:not(:last-child)::before {
    top: calc(100% + var(--flow-gap) - 16px);
    left: calc(var(--flow-circle) / 2 - 4px);
    border: 0;
    border-top: 6px solid var(--text-muted-color);
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .process-number {
    transition: none;
  }
}