/* =====================================================
   RESPONSIVE - Mobile First Design
   ===================================================== */

/* Small devices (portrait phones, less than 640px) */
@media (max-width: 639px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --font-size-2xl: 1.125rem;
  }

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

  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
  h4 { font-size: var(--font-size-xl); }
  h5 { font-size: var(--font-size-lg); }

  .hero {
    min-height: 70vh;
    padding: var(--space-2xl) 0;
  }

  .hero h1 {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
  }

  .hero p {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-lg);
  }

  .hero-buttons {
    gap: var(--space-md);
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  section {
    padding: var(--space-2xl) 0;
  }

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

  .section-header h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
  }

  .section-header p {
    font-size: var(--font-size-base);
  }

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

  .navbar-logo {
    font-size: var(--font-size-xl);
  }

  .navbar-menu {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .navbar-cta {
    flex-direction: column;
  }

  .btn {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-sm);
  }

  .btn-block {
    width: 100%;
  }

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

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

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

  .project-card {
    margin-bottom: 0;
  }

  .project-image {
    height: 200px;
  }

  .project-info {
    padding: var(--space-lg);
  }

  .benefit-item {
    gap: var(--space-md);
  }

  .benefit-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    font-size: var(--font-size-xl);
  }

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

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

  .form-input,
  .form-textarea,
  .form-select {
    padding: var(--space-md);
    font-size: var(--font-size-base);
  }

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

  .footer-bottom {
    padding-top: var(--space-lg);
  }

  .cta {
    padding: var(--space-2xl);
    margin: 0 calc(-1 * var(--container-padding));
  }

  .table {
    font-size: var(--font-size-sm);
  }

  .table th,
  .table td {
    padding: var(--space-sm);
  }

  .modal {
    width: 95%;
  }
}

/* Medium devices (landscape phones, 640px and up) */
@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: 2.5rem;
  }

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

/* Large devices (tablets, 768px and up) */
@media (min-width: 768px) {
  :root {
    --container-padding: 2rem;
  }

  .navbar-menu {
    display: flex;
  }

  .menu-toggle {
    display: none !important;
  }

  .navbar-cta {
    flex-direction: row;
  }

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

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

  .hero {
    min-height: 90vh;
  }

  .hero h1 {
    font-size: var(--font-size-5xl);
  }

  .hero-buttons {
    flex-direction: row;
  }

  .hero-buttons .btn {
    width: auto;
  }

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

  .service-card {
    padding: var(--space-2xl);
  }

  .benefit-item {
    gap: var(--space-lg);
  }

  .benefit-icon {
    width: 48px;
    height: 48px;
  }

  .md-hidden {
    display: none;
  }

  .md-block {
    display: block;
  }

  footer {
    padding: var(--space-4xl) 0 var(--space-2xl);
  }

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

/* Extra large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  .navbar-logo {
    font-size: var(--font-size-2xl);
  }

  .navbar-menu {
    gap: var(--space-2xl);
  }

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

  .service-card {
    padding: var(--space-2xl);
  }

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

/* Extra extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  :root {
    --container-padding: 2.5rem;
  }

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

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

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }

  .no-print,
  header,
  footer,
  .navbar-cta,
  .menu-toggle {
    display: none !important;
  }

  .container {
    max-width: 100%;
  }

  img {
    max-width: 100%;
  }
}

/* Preferencias de usuario */
@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;
  }
}

@media (prefers-color-scheme: dark) {
  body {
    background: var(--color-dark);
    color: var(--color-white);
  }

  .navbar {
    background: var(--color-darker);
    border-bottom-color: var(--color-slate);
  }

  .card,
  .service-card,
  .project-card,
  .testimonial-card,
  .modal {
    background: var(--color-slate);
    border-color: var(--color-darker);
    color: var(--color-white);
  }

  .navbar-menu a {
    color: var(--color-white) !important;
  }

  .form-input,
  .form-textarea,
  .form-select {
    background: var(--color-slate);
    color: var(--color-white);
    border-color: var(--color-darker);
  }

  .form-input:focus,
  .form-textarea:focus,
  .form-select:focus {
    border-color: var(--color-blue);
  }

  h1, h2, h3, h4, h5, h6 {
    color: var(--color-white);
  }

  p, a {
    color: var(--color-gray);
  }

  a:hover {
    color: var(--color-blue-light);
  }
}