/* ============================================================
   responsive.css — Responsive Adjustments
   B.I.Y Corporate Design System
   ============================================================ */

/* ── Extra large (≤ 1200px) ────────────────────────────── */
@media screen and (max-width: 1200px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .site-header__inner {
    gap: 24px;
    padding-left: 32px;
    padding-right: 32px;
  }

  .site-nav__list { gap: 24px; }
  .site-header__cta { padding: 12px 20px; font-size: var(--fs-xs); }

  :root {
    --section-padding: 110px 0;
    --section-padding-lg: 130px 0;
    --section-padding-md: 80px 0;
    --section-padding-sm: 56px 0;
  }
}

/* ── Tablet (≤ 992px) ─────────────────────────────────── */
@media screen and (max-width: 992px) {
  .container {
    padding-left: 28px;
    padding-right: 28px;
  }

  /* Hide desktop nav + CTA, show hamburger */
  .site-nav,
  .site-header__cta {
    display: none;
  }

  .hamburger {
    display: block;
  }

  .site-header__inner {
    grid-template-columns: auto 1fr;
    gap: 0;
    padding: 0 28px;
  }

  .hamburger { justify-self: end; }

  /* Cards */
  .cards-grid,
  .cards-grid--4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  /* Footer */
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    padding: 0 28px 60px;
  }

  .site-footer__brand { grid-column: 1 / -1; }

  /* Section padding scale */
  :root {
    --section-padding: 88px 0;
    --section-padding-lg: 100px 0;
    --section-padding-md: 64px 0;
  }

  .section-heading { margin-bottom: 56px; }
}

/* ── Mobile (≤ 768px) ─────────────────────────────────── */
@media screen and (max-width: 768px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  body {
    font-size: var(--fs-sm);
  }

  /* Sections */
  :root {
    --section-padding: 72px 0;
    --section-padding-lg: 88px 0;
    --section-padding-md: 56px 0;
    --section-padding-sm: 40px 0;
  }

  /* Buttons */
  .btn {
    padding: 16px 28px;
    min-width: 0;
    width: auto;
  }

  .btn--large {
    padding: 18px 36px;
    min-width: 0;
  }

  .btn-group { gap: 12px; }

  /* Header */
  .site-header { padding: 16px 0; }
  .site-header__inner { padding: 0 20px; }

  /* Page hero */
  .page-hero { padding: 140px 0 80px; }

  /* Cards down to 1 column */
  .cards-grid,
  .cards-grid--4 {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card { padding: 40px 28px; }

  /* Footer */
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 20px 56px;
  }

  .site-footer__brand { grid-column: auto; }

  .site-footer__bottom-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding: 20px;
  }

  .site-footer__legal { gap: 20px; flex-wrap: wrap; justify-content: center; }

  /* Section heading */
  .section-heading { margin-bottom: 44px; }

  /* Back to top */
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

/* ── Small mobile (≤ 480px) ───────────────────────────── */
@media screen and (max-width: 480px) {
  .site-logo__img { height: 28px; }
  .site-logo__tag { font-size: 8px; letter-spacing: 0.28em; margin-top: 4px; }

  .site-footer__logo-img { height: 36px; }

  .page-hero { padding: 120px 0 64px; }

  .section-heading__title { letter-spacing: 0.06em; }
}