/* ================================================================
   responsive.css — Mobile-First Responsive Overrides
   Matches DESIGN.md §5 breakpoints: xs(375), sm(640), md(768), lg(1024), xl(1280)
   ================================================================ */

/* ================================================================
   MOBILE (< 640px) — Default styles in style.css are mobile-first.
   These overrides adjust for very small screens.
   ================================================================ */
@media (max-width: 639px) {
  /* Hero */
  .hero__title {
    font-size: 2.5rem;
  }
  .hero__subtitle {
    font-size: 1rem;
  }
  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
  .hero__stat-number {
    font-size: 1.75rem;
  }

  /* Services grid — single column */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Testimonials — single column */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Contact — stacked */
  .contact-layout {
    grid-template-columns: 1fr;
  }

  /* Form row — stacked */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer — 2-col on small screens */
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }

  /* Navigation — hamburger */
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(8, 15, 31, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform var(--duration-normal) var(--ease-default);
    z-index: 299;
  }

  .nav__menu--open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    gap: var(--space-8);
    text-align: center;
  }

  .nav__link {
    font-size: 1.125rem;
  }

  .section {
    padding-block: var(--space-12);
  }

  .section__title {
    font-size: 1.75rem;
  }

  .contact-form {
    padding: var(--space-5);
  }
}

/* ================================================================
   SM (≥ 640px) — Large phones landscape
   ================================================================ */
@media (min-width: 640px) {
  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

  .section {
    padding-block: var(--space-16);
  }
}

/* ================================================================
   MD (≥ 768px) — Tablets
   ================================================================ */
@media (min-width: 768px) {
  .hero__title {
    font-size: 3rem;
  }

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

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

  .contact-layout {
    grid-template-columns: 1.2fr 1fr;
  }

  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .section {
    padding-block: var(--space-20);
  }

  .section__title {
    font-size: 2.25rem;
  }
}

/* ================================================================
   LG (≥ 1024px) — Small laptops / landscape tablets
   ================================================================ */
@media (min-width: 1024px) {
  .hero__title {
    font-size: 3.75rem;
  }

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

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

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

  .contact-layout {
    grid-template-columns: 1.5fr 1fr;
  }

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

  .section {
    padding-block: var(--space-20);
  }

  .container-sm,
  .container-md,
  .container-lg,
  .container-xl {
    padding-inline: var(--space-8);
  }
}

/* ================================================================
   XL (≥ 1280px) — Desktops
   ================================================================ */
@media (min-width: 1280px) {
  .hero__title {
    font-size: 3.75rem;
  }
}

/* ================================================================
   Touch target minimum (WCAG 2.5.5)
   ================================================================ */
@media (pointer: coarse) {
  .nav__link,
  .btn {
    min-height: 44px;
  }
}