/* ———— Strata — sections, specimens, quiz, footer ———— */

.section {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--gap) clamp(1.25rem, 5vw, 3.5rem);
}

.section-alt {
  max-width: none;
  background: var(--paper-alt);
  border-block: 1px solid var(--rule);
}

.section-alt > * {
  max-width: var(--measure);
  margin-inline: auto;
}

.section-head { margin-bottom: clamp(2rem, 5vw, 3.25rem); }

.section-head h2 {
  font-size: clamp(1.8rem, 3.6vw, 2.75rem);
  margin: 0.75rem 0 0;
}

.section-lede {
  color: var(--ink-soft);
  max-width: 42rem;
  margin-top: 1rem;
}

/* ———— the three families ———— */
.family-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(17rem, 100%), 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.family h3 {
  font-size: 1.5rem;
  margin: 0.35rem 0 0.7rem;
}

.family p { color: var(--ink-soft); font-size: 0.97rem; }

.swatch {
  display: block;
  width: 100%;
  height: 11.5rem;
  object-fit: cover;
  margin-bottom: 1.25rem;
  border: 1px solid var(--rule);
  background: #221d18;
  filter: saturate(0.92) contrast(1.04);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.family:hover .swatch { filter: saturate(1.05) contrast(1.06); }


.clickable { cursor: pointer; transition: transform 0.16s ease, box-shadow 0.2s ease; }
.clickable:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -18px rgba(27,24,21,0.55); }
.clickable.squeezed { transform: scale(0.97) translateY(0); }
.clickable:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.chips li {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
}

/* ———— specimen of the day ———— */
.specimen-card > * { min-width: 0; }

.specimen-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(1.75rem, 5vw, 4rem);
  align-items: center;
}

.specimen-visual { margin: 0; }

.specimen-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--rule);
  box-shadow: 0 26px 60px -34px rgba(0, 0, 0, 0.9);
  transition: opacity 0.35s ease;
}

.specimen-visual img.swapping { opacity: 0; }

.specimen-body h3 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin: 0.4rem 0 1rem;
}

.specimen-body > p { color: var(--ink-soft); max-width: 38rem; }

.spec-list {
  display: flex;
  gap: 2.5rem;
  margin: 1.75rem 0;
  flex-wrap: wrap;
}

.spec-list dt {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.3rem;
}

.spec-list dd { font-family: var(--display); font-size: 1.15rem; }

/* ———— facts ———— */
.facts-grid {
  list-style: none;
  counter-reset: fact;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(19rem, 100%), 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.facts-grid li {
  counter-increment: fact;
  padding: 1.75rem 1.5rem 1.75rem 0;
  border-bottom: 1px solid var(--rule);
}

.facts-grid li::before {
  content: "0" counter(fact);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.6rem;
}

.facts-grid h3 { font-size: 1.22rem; margin-bottom: 0.4rem; }
.facts-grid p { color: var(--ink-soft); font-size: 0.95rem; }

/* ———— quiz ———— */
.quiz-card {
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  max-width: 44rem;
}

.quiz-progress-bar {
  height: 2px;
  background: var(--rule);
  margin-bottom: 1.75rem;
}

.quiz-progress-bar span {
  display: block;
  height: 100%;
  background: var(--accent);
  transition: width 0.35s ease;
}

.quiz-q {
  font-family: var(--display);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  line-height: 1.3;
  margin-bottom: 1.5rem;
}

.quiz-options { display: flex; flex-direction: column; gap: 0.6rem; }

.quiz-option {
  text-align: left;
  font: inherit;
  font-size: 1rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--rule);
  background: none;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.quiz-option:hover { border-color: var(--ink-soft); }
.quiz-option.right { border-color: #4f7d4a; background: color-mix(in srgb, #4f7d4a 12%, transparent); }
.quiz-option.wrong { border-color: var(--accent); background: var(--accent-soft); }

.quiz-feedback {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  min-height: 1.4rem;
}

.quiz-score { font-family: var(--display); font-size: 1.6rem; margin-bottom: 1.25rem; }

/* ———— field notes ———— */
.notes-list {
  list-style: none;
  counter-reset: note;
  display: grid;
  gap: 1.25rem;
  max-width: 46rem;
}

.notes-list li {
  counter-increment: note;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.notes-list li::before {
  content: counter(note, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  padding-top: 0.35rem;
  grid-row: span 2;   /* the number spans both rows, so the text keeps column 2 */
}

.notes-list h3 { font-size: 1.2rem; margin-bottom: 0.25rem; }
.notes-list p { color: var(--ink-soft); font-size: 0.95rem; }

/* ———— footer ———— */
.site-foot {
  border-top: 1px solid var(--rule);
  background: var(--paper-alt);
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.25rem, 5vw, 3.5rem);
}

.foot-inner .wordmark { margin-bottom: 0.5rem; }

.foot-inner {
  max-width: var(--measure);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.fine-print {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

@media (max-width: 54rem) {
  .specimen-card { grid-template-columns: 1fr; }
  .facts-grid li { padding-right: 0; }
}

/* ———— credits ———— */
.credits { margin-top: 1rem; max-width: 46rem; }

.credits summary {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  cursor: pointer;
}

.credits ul {
  list-style: none;
  margin-top: 0.75rem;
  display: grid;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--ink-faint);
}