.flex-row { display: flex; flex-direction: row; }
.flex-column { display: flex; flex-direction: column; }
.items-centered { align-items: center; }
.items-start { align-items: flex-start; }
.space-between { justify-content: space-between; }
.justify-centered { justify-content: center; }
.wrap-items { flex-wrap: wrap; }
.gap-small { gap: clamp(0.35rem, 0.3rem + 0.2vw, 0.55rem); }
.gap-medium { gap: clamp(0.7rem, 0.6rem + 0.4vw, 1rem); }
.gap-large { gap: clamp(1.1rem, 0.9rem + 0.9vw, 1.8rem); }
.block-item { display: block; }
.relative-box { position: relative; }
.text-centered { text-align: center; }
.text-balance { text-wrap: balance; }
.leading-relaxed { line-height: 1.7; }
.text-muted { color: var(--color-ink-soft); }
.text-accent { color: var(--color-frost-deep); }
.text-inverse { color: var(--color-surface); }
.emphasis-strong { font-weight: 700; }
.surface-white { background: var(--color-surface); }
.shadow-soft { box-shadow: 0 8px 24px var(--color-shade); }
.rounded-soft { border-radius: 14px; }
.rounded-edge { border-radius: 10px; }
.mono-tag {
  font-family: 'IBM Plex Mono', 'Consolas', monospace;
  font-size: clamp(0.72rem, 0.7rem + 0.14vw, 0.8rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.space-above-small { margin-top: clamp(0.4rem, 0.35rem + 0.2vw, 0.6rem); }
.space-above-medium { margin-top: clamp(0.8rem, 0.7rem + 0.4vw, 1.15rem); }
.space-above-large { margin-top: clamp(1.4rem, 1.1rem + 1.4vw, 2.2rem); }
.space-below-medium { margin-bottom: clamp(0.8rem, 0.7rem + 0.4vw, 1.15rem); }
.space-below-large { margin-bottom: clamp(1.4rem, 1.1rem + 1.4vw, 2.2rem); }
.full-width { width: 100%; }
.no-underline { text-decoration: none; }
.cta-link { text-decoration: none; }
.hidden-item { display: none; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


@media (max-width: 768px) {
  .secondary-content { display: none; }
  .decoration { display: none; }
  .welcome-content h1 { font-size: 2rem; }
  .page-main > section:nth-child(odd),
  .page-main > section:nth-child(even) {
    padding: 1.5rem 1rem;
  }
}


.ink-strong { color: var(--color-ink); }
.content-column { margin-left: auto; margin-right: auto; }
.tap-target { min-width: 44px; min-height: 44px; }
.overflow-clip { overflow: hidden; }