/* ============================================================
   inLine Orthodontics — Responsive Styles
   MBR Project Solutions, LLC
   ============================================================ */

/* ============================================================
   TABLET (max-width: 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 3.5rem;
    --header-height: 90px;
  }

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

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }

  .hero__text {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

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


/* ============================================================
   MOBILE NAV BREAKPOINT (max-width: 900px)
   ============================================================ */
@media (max-width: 900px) {
  .mobile-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(85vw, 360px);
    height: 100vh;
    background-color: var(--color-white);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    z-index: 999;
  }

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

  .main-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .main-nav__link {
    padding: var(--space-md) 0;
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--color-border);
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 var(--space-sm) var(--space-md);
    display: none;
  }

  .main-nav__item--expanded .dropdown {
    display: block;
  }

  .dropdown__link {
    padding: var(--space-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
  }

  .dropdown__link:hover {
    background-color: transparent;
    color: var(--color-primary);
    padding-left: 0;
  }

  .header__cta {
    margin-left: 0;
    margin-top: var(--space-lg);
  }

  .header__cta .btn {
    width: 100%;
  }

  /* Mobile nav overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 998;
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .nav-overlay--visible {
    display: block;
    opacity: 1;
  }
}


/* ============================================================
   MOBILE (max-width: 640px)
   ============================================================ */
@media (max-width: 640px) {
  :root {
    --section-padding: 3rem;
    --header-height: 80px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(1.75rem, 6vw, 2.25rem);
  }

  h2 {
    font-size: clamp(1.375rem, 5vw, 1.875rem);
  }

  .header__logo img {
    height: 60px;
  }

  .hero {
    padding-top: calc(var(--header-height) + var(--space-2xl));
    padding-bottom: var(--space-3xl);
  }

  .hero__badge {
    font-size: 0.7rem;
  }

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

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

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

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

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

  .topbar__inner {
    justify-content: center;
  }

  .cta-banner {
    padding: var(--space-2xl) 0;
  }

  .section__header {
    margin-bottom: var(--space-2xl);
  }
}


/* ============================================================
   SMALL MOBILE (max-width: 380px)
   ============================================================ */
@media (max-width: 380px) {
  .btn {
    padding: 0.65rem 1.25rem;
    font-size: var(--font-size-xs);
  }

  .btn--lg {
    padding: 0.85rem 1.5rem;
    font-size: var(--font-size-sm);
  }
}


/* ============================================================
   LARGE SCREENS (min-width: 1400px)
   ============================================================ */
@media (min-width: 1400px) {
  :root {
    --section-padding: 6rem;
  }

  .hero__inner {
    gap: var(--space-4xl);
  }
}


/* ============================================================
   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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}