/* ABOUT — #about section: client ticker + tool chips */

#about .ticker {
  margin-inline: calc(var(--gutter) * -1);
  overflow: hidden;
  padding-block: 2.2rem;
  border-block: 1px solid var(--line);
  margin-top: 3.5rem;
}

#about .ticker-track {
  display: inline-flex;
  white-space: nowrap;
  will-change: transform;
}

#about .ticker-set {
  font-size: clamp(1.1rem, 2.4vw, 1.8rem);
  padding-right: 2rem;
}

/* The tool list behaves like an edit timeline: the interaction is legible as
   craft language first, and a UI flourish second. */
#about .skill-stack {
  --skill-label-width: clamp(3.4rem, 6vw, 5.25rem);
  --skill-play-x: 60%;
  margin-top: clamp(2.8rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}

#about .skill-stack-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1.25rem 1.8rem;
}

#about .skill-stack-head h3 {
  margin-top: 0.2rem;
  font-size: clamp(1.25rem, 2vw, 2.1rem);
  font-variation-settings: 'wdth' 105, 'wght' 560;
  font-weight: 560;
  line-height: 1;
  letter-spacing: -0.025em;
}

#about .skill-instruction {
  max-width: 30rem;
  text-align: right;
}

#about .skill-timeline {
  position: relative;
  isolation: isolate;
  border-block: 1px solid var(--line);
  background:
    linear-gradient(120deg, color-mix(in srgb, var(--uv) 5%, transparent), transparent 38%),
    linear-gradient(300deg, color-mix(in srgb, var(--amber) 3%, transparent), transparent 45%);
}

#about .skill-ruler {
  display: grid;
  grid-template-columns: var(--skill-label-width) repeat(5, 1fr);
  min-height: 2.3rem;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

#about .skill-ruler span {
  align-self: stretch;
  display: flex;
  align-items: center;
  padding-left: 0.65rem;
  border-left: 1px solid color-mix(in srgb, var(--ash) 18%, transparent);
  font-size: 0.58rem;
}

#about .skill-ruler span:first-child {
  border-left: 0;
  color: var(--signal);
}

#about .skill-playhead {
  position: absolute;
  z-index: 4;
  top: 0;
  bottom: 0;
  left: var(--skill-play-x);
  width: 1px;
  pointer-events: none;
  background: linear-gradient(var(--amber), var(--bone) 36%, var(--uv));
  box-shadow: 0 0 12px color-mix(in srgb, var(--uv) 60%, transparent), 0 0 30px color-mix(in srgb, var(--amber) 20%, transparent);
  transition: left 0.45s var(--ease-cut);
}

#about .skill-playhead::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 7px;
  height: 7px;
  background: var(--bone);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform: translateX(-50%);
}

#about .skill-timeline.is-scrubbing .skill-playhead {
  transition: none;
}

#about .skill-track {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: var(--skill-label-width) minmax(0, 1fr);
  width: 100%;
  min-height: 4.45rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

#about .skill-track:last-of-type {
  border-bottom: 0;
}

#about .skill-track-id {
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--line);
  transition: color 0.25s ease, background-color 0.25s ease;
}

#about .skill-lane {
  position: relative;
  display: flex;
  align-items: center;
  padding: 0.65rem;
  background: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(20% - 1px),
    color-mix(in srgb, var(--ash) 9%, transparent) calc(20% - 1px),
    color-mix(in srgb, var(--ash) 9%, transparent) 20%
  );
}

#about .skill-clip {
  position: relative;
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) auto;
  align-items: center;
  gap: 1rem;
  width: var(--clip-width);
  min-height: 3rem;
  margin-left: var(--clip-start);
  padding: 0.65rem 0.85rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--line) 84%, var(--ash));
  background: color-mix(in srgb, var(--carbon) 90%, transparent);
  transition: border-color 0.28s ease, background-color 0.28s ease, transform 0.45s var(--ease-cut);
}

#about .skill-clip::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--skill-tone);
  box-shadow: 0 0 16px var(--skill-tone);
  opacity: 0.68;
}

#about .skill-clip-name {
  color: color-mix(in srgb, var(--bone) 80%, var(--ash));
  font-size: clamp(0.8rem, 1.05vw, 0.98rem);
  letter-spacing: 0.045em;
  white-space: nowrap;
}

#about .skill-clip-role {
  font-size: 0.6rem;
  white-space: nowrap;
}

#about .skill-track[data-active='true'] .skill-track-id {
  color: var(--bone);
  background: color-mix(in srgb, var(--bone) 4%, transparent);
}

#about .skill-track[data-active='true'] .skill-clip {
  border-color: color-mix(in srgb, var(--skill-tone) 68%, var(--bone));
  background: linear-gradient(100deg, color-mix(in srgb, var(--skill-tone) 13%, var(--carbon)), color-mix(in srgb, var(--carbon) 92%, transparent));
  transform: translateX(5px);
}

#about .skill-track[data-active='true'] .skill-clip-name {
  color: var(--bone);
}

#about .skill-track:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: -2px;
}

#about .skill-readout {
  display: grid;
  grid-template-columns: var(--skill-label-width) minmax(14rem, 0.55fr) 1fr;
  min-height: 8.1rem;
  border-bottom: 1px solid var(--line);
}

#about .skill-readout-index {
  display: grid;
  place-items: center;
  border-right: 1px solid var(--line);
  color: var(--signal);
}

#about .skill-readout-title {
  align-self: center;
  padding: 1.25rem;
  font-size: clamp(1.15rem, 2.1vw, 2rem);
  font-variation-settings: 'wdth' 104, 'wght' 650;
  line-height: 1;
}

#about .skill-readout-copy {
  align-self: center;
  max-width: 44rem;
  padding: 1.25rem 0 1.25rem 2rem;
  border-left: 1px solid var(--line);
  color: color-mix(in srgb, var(--bone) 78%, var(--ash));
  font-size: clamp(0.88rem, 1.05vw, 1.02rem);
  line-height: 1.6;
}

/* Search-facing proof stays in the same editorial grammar as the working
   timeline: labels, rules and readable copy rather than generic service cards. */
#about .service-proof,
#about .portfolio-faq {
  margin-top: clamp(3.5rem, 8vw, 6.75rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

#about .service-proof-head,
#about .portfolio-faq-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
}

#about .service-proof-head h3,
#about .portfolio-faq-head h3 {
  max-width: 17ch;
  color: var(--bone);
  font-size: clamp(1.45rem, 3vw, 2.7rem);
  font-variation-settings: 'wdth' 116, 'wght' 720;
  line-height: 0.94;
  letter-spacing: -0.035em;
  text-align: right;
}

#about .service-proof-head h3 span {
  font-variation-settings: 'wdth' 88, 'wght' 360;
}

#about .service-proof-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 4vw, 4rem);
  max-width: 70rem;
  margin-top: clamp(1.7rem, 3vw, 2.7rem);
}

#about .service-proof-copy p {
  max-width: 34rem;
  color: color-mix(in srgb, var(--bone) 88%, var(--ash));
}

#about .service-proof-copy a,
#about .portfolio-faq a {
  color: var(--bone);
  border-bottom: 1px solid color-mix(in srgb, var(--amber) 62%, transparent);
  transition: color var(--dur-fast) var(--ease-cut), border-color var(--dur-fast) var(--ease-cut);
}

#about .service-proof-copy a:hover,
#about .service-proof-copy a:focus-visible,
#about .portfolio-faq a:hover,
#about .portfolio-faq a:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

#about .service-proof-list {
  margin-top: clamp(2rem, 4vw, 3rem);
  border-block: 1px solid var(--line);
}

#about .service-proof-list > p {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}

#about .service-proof-list ul {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

#about .service-proof-list li {
  min-height: 4.4rem;
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  color: color-mix(in srgb, var(--bone) 88%, var(--ash));
  font-size: clamp(0.88rem, 1.05vw, 1rem);
  line-height: 1.25;
}

#about .service-proof-list li + li {
  border-left: 1px solid var(--line);
}

#about .portfolio-faq {
  margin-top: clamp(3rem, 6vw, 5rem);
}

#about .portfolio-faq-list {
  margin-top: clamp(1.7rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--line);
}

#about .portfolio-faq details {
  border-top: 1px solid var(--line);
}

#about .portfolio-faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  color: var(--bone);
  cursor: pointer;
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  font-variation-settings: 'wdth' 104, 'wght' 560;
  list-style: none;
}

#about .portfolio-faq summary::-webkit-details-marker { display: none; }

#about .portfolio-faq summary::after {
  content: '+';
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 1rem;
  transition: transform var(--dur-fast) var(--ease-cut);
}

#about .portfolio-faq details[open] summary::after { transform: rotate(45deg); }

#about .portfolio-faq details p {
  max-width: 52rem;
  padding: 0 3rem 1.25rem 0;
  color: color-mix(in srgb, var(--bone) 80%, var(--ash));
}

@media (max-width: 760px) {
  #about .skill-stack-head {
    display: block;
  }

  #about .skill-instruction {
    margin-top: 0.7rem;
    text-align: left;
  }

  #about .skill-clip {
    grid-template-columns: 1fr;
    width: calc(100% - 1rem);
    margin-left: 0.5rem;
  }

  #about .skill-clip-role,
  #about .skill-playhead {
    display: none;
  }

  #about .skill-readout {
    grid-template-columns: var(--skill-label-width) 1fr;
  }

  #about .skill-readout-title {
    padding: 1rem;
  }

  #about .skill-readout-copy {
    grid-column: 2;
    padding: 0 1rem 1.25rem;
    border-left: 0;
  }

  #about .service-proof-head,
  #about .portfolio-faq-head {
    display: block;
  }

  #about .service-proof-head h3,
  #about .portfolio-faq-head h3 {
    margin-top: 0.55rem;
    text-align: left;
  }

  #about .service-proof-copy {
    grid-template-columns: 1fr;
  }

  #about .service-proof-list ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #about .service-proof-list li:nth-child(3) {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  #about .service-proof-list li:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  #about .portfolio-faq details p {
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  #about .skill-playhead,
  #about .skill-clip {
    transition: none;
  }
}