/**
 * About page — academic / textbook layer.
 * Load after theme-academic.css; body.page-about
 */

body.page-about [data-about-root] {
  background: var(--bg);
}

body.page-about .ab-section {
  padding: clamp(46px, 6vw, 78px) 0;
  scroll-margin-top: 120px;
  position: relative;
  z-index: 1;
}

body.page-about .ab-head {
  max-width: 780px;
  margin: 0 0 34px;
}

body.page-about .ab-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

body.page-about .ab-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hp-muted);
  font-weight: 700;
}

body.page-about .ab-head h2 {
  font-size: clamp(27px, 3.6vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--hp-ink);
  margin: 10px 0 0;
  line-height: 1.07;
}

body.page-about .ab-head p {
  color: var(--hp-body);
  font-size: 16.5px;
  line-height: 1.62;
  margin: 14px 0 0;
}

body.page-about .ab-head--center p {
  margin-left: auto;
  margin-right: auto;
}

/* ── Mission ── */
body.page-about .ab-northstar {
  text-align: center;
  margin: 4px auto 40px;
  max-width: 880px;
}

body.page-about .ab-northstar .ns-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hp-muted);
}

body.page-about .ab-northstar .ns-line {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.04;
  margin: 8px 0 0;
  color: var(--hp-ink);
}

body.page-about .ab-beats {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 auto 44px;
}

body.page-about .ab-beat {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--hp-ink);
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-radius: 0;
  padding: 8px 14px;
}

body.page-about .ab-beat--end {
  color: var(--hp-paper);
  background: var(--hp-blue);
  border-color: var(--hp-blue);
}

body.page-about .ab-beat-arrow {
  color: var(--hp-muted);
  font-weight: 700;
}

body.page-about .ab-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 800px) {
  body.page-about .ab-pillars {
    grid-template-columns: 1fr;
  }
}

body.page-about .ab-pillar {
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-top: 3px solid var(--hp-blue);
  border-radius: 0;
  padding: 24px 20px;
}

body.page-about .ab-pillar:nth-child(1) {
  border-top-color: var(--hp-pink);
}

body.page-about .ab-pillar:nth-child(2) {
  border-top-color: var(--hp-blue);
}

body.page-about .ab-pillar:nth-child(3) {
  border-top-color: var(--hp-sym-up);
}

body.page-about .ab-pillar h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--hp-ink);
  margin: 2px 0 10px;
  letter-spacing: -0.01em;
}

body.page-about .ab-pillar p {
  font-size: 14.5px;
  color: var(--hp-body);
  line-height: 1.6;
  margin: 0;
}

/* ── Loop vs line ── */
body.page-about .ab-vs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: stretch;
}

@media (max-width: 900px) {
  body.page-about .ab-vs {
    grid-template-columns: 1fr;
  }
}

body.page-about .ab-card {
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-radius: 0;
  padding: 24px 22px;
  box-shadow: none;
}

body.page-about .ab-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--hp-ink);
  margin: 0 0 4px;
}

body.page-about .ab-card .ab-card-sub {
  font-size: 13.5px;
  color: var(--hp-muted);
  margin: 0 0 14px;
}

body.page-about .ab-loop-svg {
  width: 100%;
  height: auto;
  display: block;
}

body.page-about .ab-card--line {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

body.page-about .ab-line {
  list-style: none;
  margin: 16px 0 0;
  padding: 8px 0 8px 56px;
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: clamp(340px, 42vw, 420px);
}

body.page-about .ab-line::before {
  content: '';
  position: absolute;
  left: 17px;
  top: 22px;
  bottom: 22px;
  width: 3px;
  background: var(--hp-line);
}

body.page-about .ab-line li {
  position: relative;
  display: block;
  padding: 0 0 clamp(28px, 4vw, 44px);
  border-top: none;
  flex: 1;
}

body.page-about .ab-line li:last-child {
  padding-bottom: 0;
}

body.page-about .ab-line .ln-n {
  position: absolute;
  left: -56px;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 0;
  background: var(--hp-paper);
  border: 2px solid var(--hp-blue);
  color: var(--hp-ink);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

body.page-about .ab-line li:last-child .ln-n {
  background: var(--hp-blue);
  border-color: var(--hp-blue);
  color: var(--hp-paper);
}

body.page-about .ab-line .ln-t {
  font-size: clamp(16px, 1.6vw, 18px);
  color: var(--hp-ink);
  font-weight: 700;
  display: block;
  padding-top: 4px;
  line-height: 1.25;
}

body.page-about .ab-line .ln-t span {
  display: block;
  font-weight: 500;
  color: var(--hp-body);
  font-size: clamp(14px, 1.35vw, 15.5px);
  margin-top: 6px;
  line-height: 1.5;
  max-width: 28rem;
}

body.page-about .ab-line-foot {
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--hp-muted);
}

body.page-about .ab-line-foot a {
  color: var(--hp-blue);
  font-weight: 700;
  text-decoration: none;
}

body.page-about .ab-line-foot a:hover {
  text-decoration: underline;
}

body.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}

@media (max-width: 760px) {
  body.page-about .ab-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

body.page-about .ab-stat {
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-radius: 0;
  padding: 20px 16px;
  text-align: center;
  box-shadow: none;
}

body.page-about .ab-stat .st-v {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--hp-ink);
}

body.page-about .ab-stat:nth-child(1) .st-v {
  color: var(--hp-sym-down);
}

body.page-about .ab-stat:nth-child(2) .st-v {
  color: var(--hp-blue);
}

body.page-about .ab-stat .st-l {
  font-size: 13px;
  color: var(--hp-body);
  line-height: 1.45;
  margin-top: 9px;
}

/* ── Map ── */
body.page-about .ab-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

@media (max-width: 980px) {
  body.page-about .ab-flow {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  body.page-about .ab-flow {
    grid-template-columns: 1fr;
  }
}

body.page-about .ab-stage-h {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

body.page-about .ab-stage-dot {
  width: 10px;
  height: 10px;
  border-radius: 0;
  flex: 0 0 auto;
}

body.page-about .ab-stage--name .ab-stage-dot {
  background: var(--hp-muted);
}

body.page-about .ab-stage--name .ab-stage-h {
  color: var(--hp-muted);
}

body.page-about .ab-stage--laugh .ab-stage-dot {
  background: var(--hp-pink);
}

body.page-about .ab-stage--laugh .ab-stage-h {
  color: var(--hp-pink);
}

body.page-about .ab-stage--prove .ab-stage-dot {
  background: #d97706;
}

body.page-about .ab-stage--prove .ab-stage-h {
  color: #b45309;
}

body.page-about .ab-stage--fix .ab-stage-dot {
  background: var(--hp-blue);
}

body.page-about .ab-stage--fix .ab-stage-h {
  color: var(--hp-blue);
}

body.page-about .ab-pcard {
  display: block;
  text-decoration: none;
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-radius: 0;
  padding: 14px 15px;
  margin-bottom: 10px;
  transition: border-color 0.12s;
}

body.page-about .ab-pcard:hover {
  border-color: var(--hp-blue);
  transform: none;
  box-shadow: none;
}

body.page-about .ab-pcard .pc-top {
  display: flex;
  align-items: center;
  gap: 9px;
}

body.page-about .ab-pcard .pc-ico {
  display: inline-flex;
  width: 20px;
  height: 20px;
  color: var(--hp-muted);
  flex: 0 0 auto;
}

body.page-about .ab-pcard .pc-ico svg {
  width: 20px;
  height: 20px;
}

body.page-about .ab-stage--laugh .pc-ico {
  color: var(--hp-pink);
}

body.page-about .ab-stage--prove .pc-ico {
  color: #d97706;
}

body.page-about .ab-stage--fix .pc-ico {
  color: var(--hp-blue);
}

body.page-about .ab-pcard .pc-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--hp-ink);
  letter-spacing: -0.01em;
}

body.page-about .ab-pcard .pc-desc {
  font-size: 12.7px;
  color: var(--hp-body);
  line-height: 1.5;
  margin: 6px 0 0;
}

body.page-about .ab-flow-arrow {
  text-align: center;
  color: var(--hp-line);
  font-size: 22px;
  font-weight: 800;
  margin: 2px 0 10px;
}

@media (min-width: 981px) {
  body.page-about .ab-flow-arrow {
    display: none;
  }
}

body.page-about .ab-outcome {
  margin-top: 24px;
  border-radius: 0;
  padding: 18px 22px;
  background: var(--hp-grey);
  border: 1px solid var(--hp-line);
  border-left: 4px solid var(--hp-blue);
  color: var(--hp-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

body.page-about .ab-outcome b {
  font-size: clamp(17px, 2.4vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

body.page-about .ab-outcome span {
  font-size: 14px;
  color: var(--hp-body);
}

/* ── Maker ── */
body.page-about .ab-maker {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 860px) {
  body.page-about .ab-maker {
    grid-template-columns: 1fr;
  }
}

body.page-about .ab-maker p {
  font-size: 15.5px;
  color: var(--hp-body);
  line-height: 1.65;
  margin: 0 0 14px;
}

body.page-about .ab-maker p em {
  font-style: normal;
  font-weight: 700;
  color: var(--hp-ink);
}

body.page-about .ab-maker-side {
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-radius: 0;
  padding: 22px;
}

body.page-about .ab-maker-side h4 {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hp-muted);
  margin: 0 0 14px;
}

body.page-about .ab-maker-vid {
  display: block;
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 0;
  overflow: hidden;
  border: 1px solid var(--hp-line);
  background: var(--hp-grey);
  margin: 0 0 18px;
}

body.page-about .ab-maker-vid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: none;
}

body.page-about .ab-maker-play {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 48px;
  height: 48px;
  border-radius: 0;
  background: rgba(11, 18, 32, 0.62);
  display: grid;
  place-items: center;
  transition: background 0.15s ease;
}

body.page-about .ab-maker-vid:hover .ab-maker-play {
  background: var(--hp-blue);
}

body.page-about .ab-maker-play svg {
  width: 20px;
  height: 20px;
  margin-left: 2px;
}

body.page-about .ab-maker-vcap {
  position: absolute;
  left: 10px;
  bottom: 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: rgba(11, 18, 32, 0.78);
  padding: 3px 8px;
  border-radius: 0;
}

body.page-about .ab-fact {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--hp-line);
  font-size: 14px;
}

body.page-about .ab-fact:first-of-type {
  border-top: none;
}

body.page-about .ab-fact .f-k {
  color: var(--hp-body);
}

body.page-about .ab-fact .f-v {
  color: var(--hp-ink);
  font-weight: 700;
  text-align: right;
}

body.page-about .ab-sources {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--hp-muted);
  line-height: 1.55;
}

body.page-about .ab-sources a {
  color: var(--hp-blue);
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
}

/* ── FAQ ── */
body.page-about .ab-faq {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (max-width: 760px) {
  body.page-about .ab-faq {
    grid-template-columns: 1fr;
  }
}

body.page-about .ab-qa {
  background: var(--hp-paper);
  border: 1px solid var(--hp-line);
  border-left: 3px solid var(--hp-blue);
  border-radius: 0;
  padding: 18px 20px;
}

body.page-about .ab-qa .q {
  font-size: 15px;
  font-weight: 800;
  color: var(--hp-ink);
  margin-bottom: 7px;
}

body.page-about .ab-qa .a {
  font-size: 13.6px;
  line-height: 1.6;
  color: var(--hp-body);
}

body.page-about .ab-qa .a a {
  color: var(--hp-blue);
  text-decoration: none;
  font-weight: 600;
}

/* ── CTA ── */
body.page-about .ab-cta {
  text-align: center;
}

body.page-about .ab-cta h2 {
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--hp-ink);
  margin: 0;
}

body.page-about .ab-cta p {
  color: var(--hp-body);
  font-size: 16px;
  margin: 12px auto 24px;
  max-width: 560px;
}

body.page-about .ab-cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}