/* ─── Containers ────────────────────────────────── */
.container {
  --gutter: clamp(1.5rem, 5vw, 2.75rem);
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  /* Generous, consistent breathing room — never tighter than 24px,
     and always clears the device safe-area on notched phones. */
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}

.container--narrow { max-width: var(--container-narrow); }
.container--wide   { max-width: var(--container-wide); }
.container--bleed  { max-width: var(--container-bleed); }

/* ─── Sections ──────────────────────────────────── */
.section {
  padding: var(--section-pad) 0;
  position: relative;
}

/* Anchored sections land below the fixed nav, not tucked under it. */
[id] { scroll-margin-top: calc(var(--nav-total) + 1.25rem); }

.section--tight { padding: clamp(3rem, 6vw, 5rem) 0; }

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-text);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 1.25rem;
}

.section__eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

.section__heading {
  font-size: var(--fs-h2);
  letter-spacing: var(--tracking-tighter);
  line-height: 1.02;
  margin-bottom: 1.25rem;
  max-width: 18ch;
}

.section__heading--center { margin-left: auto; margin-right: auto; }

.section__lead {
  font-size: var(--fs-lead);
  color: var(--ink-2);
  max-width: 56ch;
  line-height: 1.55;
  margin-bottom: 3.5rem;
}

.section__head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.section__head .section__heading,
.section__head .section__lead { margin-bottom: 0; }

@media (max-width: 720px) {
  .section__head { grid-template-columns: 1fr; align-items: start; }
}

/* ─── Grid utilities ────────────────────────────── */
.grid {
  display: grid;
  gap: clamp(1.25rem, 2.4vw, 2rem);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { align-items: center; justify-content: space-between; }
.flex--col { flex-direction: column; }
.flex--wrap { flex-wrap: wrap; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.gap-lg { gap: 1.5rem; }

/* ─── Apple-style hairline rule ─────────────────── */
.rule {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--hairline-strong), transparent);
  border: 0;
}

/* ─── Type accent (gradient text) ───────────────── */
.text-grad {
  background: linear-gradient(135deg, var(--accent), var(--accent-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.text-mono { font-family: var(--font-mono); }

/* ─── Reading-progress bar ──────────────────────── */
.read-progress {
  position: fixed;
  left: 0; top: 0; right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
}
.read-progress__fill {
  height: 100%;
  width: var(--p, 0%);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 80ms linear;
}