/* ==========================================================================
   SERVE AND RETURN LLP — Responsive Styles
   ========================================================================== */

/* --- Large Tablets & Small Desktops --- */
@media (max-width: 1100px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

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

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

/* --- Tablets --- */
@media (max-width: 900px) {
  :root {
    --space-4xl: 4rem;
    --space-5xl: 5rem;
  }

  .nav__list {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    gap: var(--space-md);
    box-shadow: var(--shadow-xl);
    transition: right var(--duration-normal) var(--ease-out);
    z-index: 1000;
  }

  .nav__list--open {
    right: 0;
  }

  .nav__link {
    color: var(--color-text);
    font-size: var(--fs-md);
    width: 100%;
    padding-block: var(--space-sm);
  }

  .nav__link::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav .btn {
    display: none;
  }

  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(18, 60, 105, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
    z-index: 999;
  }

  .nav-overlay--visible {
    opacity: 1;
    visibility: visible;
  }

  .split {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

  .process__track {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }

  .process__track::before {
    display: none;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin-inline: auto;
  }

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

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

/* --- Mobile --- */
@media (max-width: 640px) {
  :root {
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
    --header-height: 70px;
  }

  .container {
    padding-inline: var(--space-md);
  }

  h2 {
    font-size: var(--fs-2xl);
  }

  .hero__subtitle {
    font-size: var(--fs-base);
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }

  .stats {
    margin-top: calc(-1 * var(--space-2xl));
  }

  .stats__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .stat-card {
    padding: var(--space-lg) var(--space-md);
  }

  .stat-card__number {
    font-size: var(--fs-2xl);
  }

  .services-grid,
  .features-grid,
  .values-grid,
  .industries-grid {
    grid-template-columns: 1fr;
  }

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

  .service-card {
    padding: var(--space-xl);
  }

  .cta {
    padding: var(--space-2xl) var(--space-lg);
    border-radius: var(--radius-lg);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

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

  .hero__scroll {
    display: none;
  }

  .back-to-top {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 44px;
    height: 44px;
  }

  .page-hero {
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }
}

/* --- Small Mobile --- */
@media (max-width: 400px) {
  .stats__grid {
    grid-template-columns: 1fr;
  }

  .logo__text span {
    display: none;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}

/* --- Print --- */
@media print {
  .header,
  .back-to-top,
  .nav-toggle,
  .hero__scroll,
  .cta {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }

  .section {
    padding-block: 1rem;
  }
}