/*
  Mobile-first overrides. Base styles above already work down to small
  screens for most components (auto-fit grids); this file handles the
  header/nav collapse and the two-column layouts that need to stack.
*/

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: 72px 0 0 0;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding: 32px 24px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 20px;
    width: 100%;
  }

  .site-nav__link {
    display: block;
    font-size: 1.15rem;
  }

  .lang-switch {
    align-self: flex-start;
  }

  .hero__row {
    grid-template-columns: 1fr;
  }

  .hero__profile {
    max-width: 280px;
    margin: 0 auto;
  }

  .expertise-item,
  .expertise-item--reverse {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .expertise-item--reverse .expertise-item__art {
    order: 0;
  }

  .expertise-item__art {
    max-width: 200px;
  }

  .contact__row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .section {
    padding: 64px 0;
  }

  .container {
    padding: 0 18px;
  }

  .site-header__logo-text {
    display: none;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .principle {
    grid-template-columns: 40px 1fr;
    gap: 16px;
  }

  .principle__index {
    font-size: 1.1rem;
  }
}