/* =========================================================================
   pages/about.css
   ========================================================================= */

/* -------------------------------------------------------------------------
   The gap — a three-link causal chain, not three cards.
   The connecting rule is what makes it read as a mechanism.
   ------------------------------------------------------------------------- */

.c-chain {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(var(--space-md), 3vw, var(--space-xl));
}

.c-chain__link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  padding-top: var(--space-lg);
}

/* The rule runs across the top of every link, with a node at each step. */
.c-chain__link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: calc((clamp(var(--space-md), 3vw, var(--space-xl))) * -1);
  height: 2px;
  background-color: var(--color-line-strong);
}

.c-chain__link:last-child::before {
  right: 0;
}

.c-chain__link::after {
  content: '';
  position: absolute;
  top: -5px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--brand-accent-lift);
}

.c-chain__index {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--tracking-mono);
  color: var(--color-accent-text);
}

.c-chain__title {
  font-size: clamp(1.15rem, 2.4vw, 1.6rem);
  letter-spacing: -0.02em;
}

.c-chain__link p {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  line-height: var(--lh-loose);
}

.c-chain__close {
  max-width: 58ch;
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-line);
  font-size: var(--fs-lead);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
}

.c-chain__close strong {
  color: var(--color-text);
  font-weight: var(--weight-semi);
}

/* -------------------------------------------------------------------------
   Origin — the emotional centre of the page. Given the accent field and more
   air than anything around it, so it reads as a change of register.
   ------------------------------------------------------------------------- */

.c-origin__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.c-origin__title {
  margin-top: var(--space-md);
  font-size: clamp(2rem, 5.6vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: var(--tracking-hero);
  text-transform: uppercase;
}

.c-origin__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  font-size: var(--fs-lead);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
}

.c-origin__punch {
  margin-top: var(--space-2xs);
  padding-top: var(--space-md);
  border-top: 2px solid var(--bone-100);
  font-family: var(--font-display);
  font-weight: var(--weight-semi);
  font-size: clamp(1.15rem, 2.7vw, 1.6rem);
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

/* -------------------------------------------------------------------------
   Ledger — the argument made by column length. A long list against a single
   line does more work than any amount of copy.
   ------------------------------------------------------------------------- */

.c-ledger {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(var(--space-md), 4vw, var(--space-2xl));
  align-items: start;
  padding: clamp(var(--space-md), 3.5vw, var(--space-xl));
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.c-ledger__head {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.c-ledger__list {
  display: flex;
  flex-direction: column;
}

.c-ledger__list li {
  padding-block: 0.7rem;
  border-bottom: 1px solid var(--color-line);
  font-size: var(--fs-body);
  color: var(--color-text-dim);
}

.c-ledger__buried {
  color: var(--color-text-muted);
  font-style: italic;
}

.c-ledger__list--single li {
  padding-block: 0.7rem 1rem;
  border-bottom: 2px solid var(--accent-rule);
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  letter-spacing: var(--tracking-display);
  color: var(--color-text);
}

.c-operate__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 58ch;
  margin-top: var(--space-xl);
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
}

.c-operate__body strong {
  color: var(--color-text);
  font-weight: var(--weight-semi);
}

/* -------------------------------------------------------------------------
   Figures — philosophy converted into numbers.
   ------------------------------------------------------------------------- */

.c-figures {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-lg);
}

.c-figure {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-top: var(--space-md);
  border-top: 2px solid var(--accent-rule);
}

.c-figure__value {
  display: flex;
  align-items: baseline;
  gap: 0.15em;
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  line-height: 0.98;
  letter-spacing: var(--tracking-hero);
  color: var(--color-text);
}

.c-figure__unit {
  font-size: 0.42em;
  font-weight: var(--weight-semi);
  letter-spacing: 0;
  color: var(--color-text-dim);
}

.c-figure__label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--color-accent-text);
}

.c-figure__note {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  line-height: var(--lh-body);
}

.c-figures__close {
  max-width: 54ch;
  margin-top: var(--space-2xl);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* -------------------------------------------------------------------------
   Beliefs
   ------------------------------------------------------------------------- */

.c-beliefs {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-line);
}

.c-belief {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: var(--space-md);
  padding-block: clamp(var(--space-md), 3vw, var(--space-lg));
  border-bottom: 1px solid var(--color-line);
}

.c-belief__index {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--tracking-mono);
  color: var(--color-accent-text);
  padding-top: 0.45rem;
}

.c-belief__title {
  font-size: clamp(1.15rem, 2.5vw, 1.7rem);
  line-height: 1.28;
  letter-spacing: -0.02em;
  max-width: 32ch;
  margin-bottom: var(--space-2xs);
}

.c-belief__body p {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  line-height: var(--lh-loose);
  max-width: 58ch;
}

/* -------------------------------------------------------------------------
   The model
   ------------------------------------------------------------------------- */

.c-model {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(var(--space-lg), 5vw, var(--space-2xl));
  align-items: start;
}

.c-model__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding-top: 0.5rem;
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
}

.c-model__points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 2px solid var(--color-text);
}

.c-model__points li {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.c-model__point-label {
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  letter-spacing: var(--tracking-display);
  text-transform: uppercase;
}

.c-model__point-text {
  font-size: var(--fs-sm);
  color: var(--color-text-dim);
  line-height: var(--lh-body);
}

/* -------------------------------------------------------------------------
   Founder — deliberately secondary to everything above it.
   ------------------------------------------------------------------------- */

.c-founder__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
  gap: clamp(var(--space-lg), 5vw, var(--space-2xl));
  align-items: start;
}

.c-founder__portrait {
  position: sticky;
  top: calc(var(--header-h) + var(--space-lg));
  max-width: 22rem;
}

.c-founder__caption {
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.c-founder__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.c-founder__text {
  margin-top: var(--space-md);
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
  max-width: 58ch;
}

.c-founder__traits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-top: var(--space-lg);
}

.c-founder__traits li {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* -------------------------------------------------------------------------
   Being new
   ------------------------------------------------------------------------- */

.c-new {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.c-new__text {
  margin-top: var(--space-md);
  font-size: var(--fs-lead);
  line-height: var(--lh-loose);
  color: var(--color-text-dim);
  max-width: 60ch;
}

.c-new__punch {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 2px solid var(--brand-accent-lift);
  font-family: var(--font-display);
  font-weight: var(--weight-semi);
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  line-height: 1.36;
  letter-spacing: -0.02em;
  color: var(--color-text);
  max-width: 44ch;
}

/* ------------------------------------------------------------ responsive  */

@media (max-width: 1080px) {
  .c-model,
  .c-founder__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .c-founder__portrait {
    position: static;
  }

  .c-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .c-ledger {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .c-model__points {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }

  /* The chain becomes vertical, and its rule runs down the left instead of
     across the top so it still reads as one connected mechanism. */
  .c-chain {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .c-chain__link {
    padding-top: var(--space-sm);
    padding-bottom: var(--space-lg);
    padding-left: var(--space-lg);
  }

  .c-chain__link:last-child {
    padding-bottom: 0;
  }

  .c-chain__link::before {
    top: 0;
    bottom: 0;
    left: 5px;
    right: auto;
    width: 2px;
    height: auto;
  }

  .c-chain__link:last-child::before {
    bottom: auto;
    height: 100%;
  }

  .c-chain__link::after {
    top: 4px;
    left: 0;
  }

  .c-chain__close {
    margin-top: var(--space-xl);
  }
}

@media (max-width: 620px) {
  .c-figures {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }

  .c-belief {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2xs);
  }

  .c-belief__index {
    padding-top: 0;
  }

  .c-founder__portrait {
    max-width: 16rem;
  }
}