/* "О проекте" — a personal letter from the creator. Narrow, calm reading column,
   warmer than the marketing pages: body in full ink, generous line height. */
.about-letter {
  margin-inline: auto;
  max-inline-size: 40rem;
}

.about-letter__eyebrow {
  color: var(--color-subtle-dark);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-block: 0;
  text-transform: uppercase;
}

.about-letter__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  margin-block: 0.75rem 2.5rem;
}

.about-letter__body {
  color: var(--color-ink);
  font-size: 1.075rem;
  line-height: 1.75;
}

.about-letter__body p {
  margin-block: 0 1.35rem;
}

.about-letter__greeting {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Section subheads inside the letter — uppercase display type carries the
   emphasis, so the text itself never has to shout. */
.about-letter__heading {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-block: 2.75rem 1.1rem;
  text-transform: uppercase;
}

.about-letter__highlight {
  border-inline-start: 3px solid var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  margin-block: 1.9rem;
  padding-inline-start: 1.1rem;
}

/* The letter's promise in a ten-second scan — three numbered goals for the
   skimmer; the letter below unfolds them, never repeats them. */
.about-letter__goals {
  border-block: 1px solid var(--color-subtle);
  margin-block: 2.25rem;
  padding-block: 1.4rem 1.6rem;
}

.about-letter__goals-title {
  color: var(--color-subtle-dark);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-block: 0 var(--block-space);
  text-transform: uppercase;
}

.about-letter__goals-list {
  counter-reset: goal;
  display: grid;
  gap: 0.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-letter__goals-list > li {
  column-gap: 0.9rem;
  counter-increment: goal;
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  line-height: 1.55;
}

.about-letter__goals-list > li::before {
  color: var(--color-subtle-dark);
  content: counter(goal);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.15;
}

.about-letter__signature {
  margin-block-start: 2.5rem;
}

.about-letter__sign-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-block: 0;
}

.about-letter__sign-role {
  color: var(--color-subtle-dark);
  font-size: 0.9rem;
  margin-block: 0.2rem 0;
}

.about-letter__contact {
  border-block-start: 1px solid var(--color-subtle);
  color: var(--color-subtle-dark);
  line-height: 1.6;
  margin-block: 2.5rem 0;
  padding-block-start: 1.5rem;
}

/* Appendix after the letter: an honest comparison of ways to learn a trade —
   categories, never competitors' names, so it stays fair and doesn't go stale.
   Full reading-container width; the letter column above stays 40rem. */
.about-compare {
  margin-block-start: 4rem;
}

.about-compare__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-block: 0 0.75rem;
  text-align: center;
  text-transform: uppercase;
}

.about-compare__lead {
  color: var(--color-subtle-dark);
  margin-block: 0 1.75rem;
  margin-inline: auto;
  max-inline-size: 40rem;
  text-align: center;
}

.about-compare__scroll {
  max-inline-size: 100%;
  overflow-x: auto;
}

.about-compare table {
  font-size: 0.9rem;
  inline-size: 100%;
  line-height: 1.5;
  margin: 0;
  min-inline-size: 52rem;
}

.about-compare :is(th, td) {
  vertical-align: top;
}

/* Sticky label column: opaque background + box-shadow edge, since collapsed
   borders don't travel with sticky cells. */
.about-compare :is(th[scope="row"], thead th:first-child) {
  background-color: var(--color-bg);
  box-shadow: inset -1px 0 0 var(--color-subtle-dark);
  inset-inline-start: 0;
  position: sticky;
  z-index: 1;
}

.about-compare th[scope="row"] {
  color: var(--color-subtle-dark);
  font-weight: 600;
  max-inline-size: 8.5rem; /* on a phone the sticky column must not eat the scrollport */

  @media (min-width: 640px) {
    max-inline-size: none;
    white-space: nowrap;
  }
}

/* Our column — elevated surface, same monochrome language as panels. */
.about-compare :is(th, td):last-child {
  background-color: var(--color-subtle-light);
}

.about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--block-space);
  justify-content: center;
  margin-block-start: 2.5rem;
}