/* ============================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ============================================ */

/* ============================================
   TABLETS (768px e acima)
   ============================================ */
@media (min-width: 768px) {
  :root {
    --h1: 42px;
    --h2: 32px;
    --h3: 26px;
  }
  
  .menu-toggle {
    display: none;
  }
  
  nav ul {
    gap: var(--spacing-xl);
  }
  
  .hero {
    height: 600px;
  }
  
  .hero h1 {
    font-size: 52px;
  }
  
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   DESKTOP (1024px e acima)
   ============================================ */
@media (min-width: 1024px) {
  :root {
    --h1: 38px;
    --h2: 28px;
    --h3: 24px;
  }
  
  .hero {
    height: 700px;
  }
  
  .hero h1 {
    font-size: 56px;
  }
  
  nav ul {
    gap: var(--spacing-xl);
  }
  
  .dropdown-menu {
    min-width: 280px;
  }
  
  section {
    padding: var(--spacing-2xl) 0;
  }
}

/* ============================================
   MOBILE (até 767px)
   ============================================ */
@media (max-width: 767px) {
  :root {
    --h1: 32px;
    --h2: 24px;
    --h3: 20px;
    --body: 15px;
    --spacing-xl: 32px;
    --spacing-2xl: 40px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  h1 {
    font-size: var(--h1);
  }
  
  h2 {
    font-size: var(--h2);
  }
  
  h3 {
    font-size: var(--h3);
  }
  
  /* HEADER */
  .header-content {
    padding: var(--spacing-sm) 0;
  }
  
  .logo img {
    height: 40px;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--cor-branco);
    z-index: 999;
    transition: left var(--transition-base);
    overflow-y: auto;
  }
  
  nav.active {
    left: 0;
  }
  
  nav ul {
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-md);
    align-items: flex-start;
    width: 100%;
  }
  
  nav ul li {
    width: 100%;
  }
  
  nav a {
    padding: var(--spacing-md);
    display: block;
    border-bottom: 1px solid var(--cor-cinza-claro);
  }
  
  /* DROPDOWN MOBILE */
  .dropdown-menu {
    position: static;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    transform: none;
    box-shadow: none;
    margin: 0;
    background-color: var(--cor-cinza-claro);
    transition: all var(--transition-base);
  }
  
  .dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    max-height: 500px;
  }
  
  .dropdown-menu a {
    padding-left: var(--spacing-lg);
  }
  
  /* HERO */
  .hero {
    height: auto;
    padding: var(--spacing-xl) 0;
    min-height: 300px;
  }
  
  .hero h1 {
    font-size: 28px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .hero::before {
    width: 100%;
  }
  
  /* CARDS */
  .card {
    padding: var(--spacing-md);
  }
  
  .card-icon {
    font-size: 40px;
  }
  
  /* GRID */
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  /* SERVIÇOS */
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-item {
    padding: var(--spacing-md);
  }
  
  .service-icon {
    font-size: 40px;
  }
  
  /* FOOTER */
  footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  /* BOTÕES */
  .btn {
    width: 100%;
    padding: 12px 24px;
  }
  
  /* FORMULÁRIOS */
  form {
    gap: var(--spacing-sm);
  }
  
  input, textarea, select {
    padding: 10px 12px;
  }
  
  /* WHATSAPP */
  .whatsapp-button {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    font-size: 24px;
  }
  
  /* BREADCRUMB */
  .breadcrumb {
    font-size: 12px;
    gap: var(--spacing-xs);
  }
  
  /* SEÇÃO */
  section {
    padding: var(--spacing-lg) 0;
  }
  
  section.section-alt {
    padding: var(--spacing-lg) 0;
  }
  
  /* DIFERENCIAS */
  .differentials {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  /* BRANDS */
  .brands-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .brand-item {
    width: 100%;
    height: 70px;
  }
}

/* ============================================
   EXTRA PEQUENO (até 480px)
   ============================================ */
@media (max-width: 480px) {
  :root {
    --h1: 28px;
    --h2: 22px;
    --h3: 18px;
    --body: 14px;
    --spacing-lg: 24px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
  }
  
  .container {
    padding: 0 12px;
  }
  
  .header-content {
    padding: 12px 0;
  }
  
  .logo img {
    height: 35px;
  }
  
  .hero {
    padding: var(--spacing-lg) 0;
    min-height: 250px;
  }
  
  .hero h1 {
    font-size: 24px;
  }
  
  .hero p {
    font-size: 14px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .service-item {
    padding: var(--spacing-sm);
  }
  
  .service-icon {
    font-size: 32px;
  }
  
  .testimonial-card {
    padding: var(--spacing-md);
  }
  
  .footer-content {
    gap: var(--spacing-md);
  }
  
  .social-links {
    justify-content: center;
  }
  
  .social-links a {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
  
  .whatsapp-button {
    bottom: 15px;
    right: 15px;
    width: 45px;
    height: 45px;
    font-size: 22px;
  }
  
  .brands-grid {
    grid-template-columns: 1fr;
  }
  
  .brand-item {
    height: 60px;
  }
  
  /* Tabelas responsivas */
  table {
    font-size: 12px;
  }
  
  .info-box {
    padding: var(--spacing-md);
  }
  
  .info-box h3 {
    font-size: 16px;
  }
  
  .differentials {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .differential-icon {
    font-size: 40px;
  }
  
  .differential-item h3 {
    font-size: 16px;
  }
}

/* ============================================
   IMPRESSÃO
   ============================================ */
@media print {
  header, footer, .whatsapp-button, .menu-toggle {
    display: none;
  }
  
  body {
    background-color: var(--cor-branco);
  }
  
  .card, .service-item {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  
  a {
    text-decoration: underline;
  }
}

/* ============================================
   MODO ESCURO (Opcional)
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --cor-fundo: #121212;
    --cor-branco: #1E1E1E;
    --cor-cinza-claro: #2A2A2A;
    --cor-texto: #E0E0E0;
    --cor-texto-claro: #B0B0B0;
  }
  
  body {
    background-color: var(--cor-fundo);
    color: var(--cor-texto);
  }
  
  header {
    background-color: var(--cor-branco);
  }
  
  .card, .service-item, .info-box {
    background-color: var(--cor-branco);
    color: var(--cor-texto);
  }
  
  input, textarea, select {
    background-color: var(--cor-branco);
    color: var(--cor-texto);
    border-color: var(--cor-cinza-claro);
  }
}

/* ============================================
   PERFORMANCE - PREFERS-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;
  }
  
  .whatsapp-button {
    animation: none !important;
  }
}