/* === Responsive Styles === */
/* Mobile-first: base styles target < 640px */

/*
 * Breakpoints:
 *   sm: 640px  (tablet portrait)
 *   md: 768px  (tablet landscape)
 *   lg: 1024px (desktop)
 *   xl: 1280px (wide desktop)
 */

/* ---- sm: 640px+ ---- */
@media (min-width: 640px) {
  .card-grid--2col {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-images {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .school-logo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- md: 768px+ ---- */
@media (min-width: 768px) {
  :root {
    --text-5xl: 3.5rem;
    --section-padding-y: 6rem;
  }

  .hero__title {
    font-size: var(--text-5xl);
  }

  .service-block__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid--3col {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-images--3col {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact-layout {
    grid-template-columns: 1fr 1fr;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .school-logo-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .footer__bottom {
    text-align: left;
  }
}

/* ---- lg: 1024px+ ---- */
@media (min-width: 1024px) {
  :root {
    --text-5xl: 4rem;
  }

  .card-grid--3col {
    grid-template-columns: repeat(3, 1fr);
  }

  .school-logo-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .header__menu-btn {
    display: none;
  }

  .header__nav {
    display: block;
  }
}

/* ---- xl: 1280px+ ---- */
@media (min-width: 1280px) {
  .container {
    padding-inline: 0;
  }
}

/* ---- Mobile nav (visible only < 1024px) ---- */
@media (max-width: 1023px) {
  .header__nav {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    z-index: 100;
  }

  .header__nav.open {
    opacity: 1;
    pointer-events: auto;
  }

  .header__nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-10);
  }

  .header__nav-link {
    font-size: var(--text-xl);
    font-weight: var(--weight-semibold);
    color: var(--color-text-secondary);
  }

  .header__nav-link:hover,
  .header__nav-link.active {
    color: var(--color-primary);
  }
}