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

/* ============================================
   MENÚ HAMBURGUESA
   ============================================ */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 10000;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: all var(--transition-normal);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   MOBILE - BASE (320px - 767px)
   ============================================ */
@media (max-width: 767px) {
  /* Header */
  .cabecera {
    grid-template-columns: 1fr auto;
    padding: var(--spacing-md) var(--spacing-lg);
    gap: 0;
  }

  .menu-toggle {
    display: flex;
  }

  .secciones {
    position: fixed;
    top: 20px;
    left: -320px;
    width: 280px;
    height: auto;
    max-height: calc(100vh - 40px);
    background: var(--surface);
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    padding: var(--spacing-2xl) var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    transition: left var(--transition-normal);
    z-index: 9998;
    border-radius: 0 var(--border-radius-xl) var(--border-radius-xl) 0;
    overflow-y: auto;
    border: 2px solid var(--border);
    border-left: none;
  }

  .secciones.active {
    left: 0;
    top: 0;
  }

  .seccion {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-md);
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-fast);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-xs);
  }

  .seccion:last-child {
    border-bottom: none;
    margin-bottom: 0;
  }

  .seccion:hover {
    background: var(--background);
    padding-left: var(--spacing-lg);
  }

  /* Overlay */
  .menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 9997;
  }

  .menu-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  /* Presentación */
  .presentacion > h1 {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }

  .presentacion > h2,
  #portfolio-tit {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .altura-container {
    height: 30vh;
    min-height: 200px;
  }

  /* Sobre mi */
  .div-presentacion {
    grid-template-columns: 1fr;
    padding: var(--spacing-lg);
    margin-top: 120px;
  }

  .sobre-mi {
    grid-column: 1 / -1;
    padding: var(--spacing-lg);
    text-align: center;
  }

  .datos-pre > h1 {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
  }

  .datos-pre > p {
    font-size: clamp(1rem, 4vw, 1.2rem);
  }

  .curriculum {
    max-width: 100%;
  }

  .imagen-port {
    grid-column: 1 / -1;
    max-width: 250px;
    width: 100%;
    height: auto;
    margin: 0 auto;
  }

  /* Educación */
  .div-educacion > h1 {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
  }

  .titulos {
    padding: var(--spacing-lg);
  }

  .titulo-fecha {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  /* Herramientas */
  .tools {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
  }

  /* Proyectos */
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .project-image-container {
    height: 180px;
  }

  /* Contacto */
  .contacto {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .contacto > h1 {
    grid-column: 1 / -1;
  }

  .datos-port {
    grid-column: 1 / -1;
  }

  .contact-form-container {
    grid-column: 1 / -1;
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  form {
    gap: var(--spacing-md);
  }

  input,
  textarea {
    font-size: 16px; /* Previene zoom en iOS */
  }
}

/* ============================================
   TABLET - (768px - 1024px)
   ============================================ */
@media (min-width: 768px) and (max-width: 1024px) {
  /* Header */
  .cabecera {
    grid-template-columns: 200px 1fr;
  }

  .secciones {
    gap: var(--spacing-sm);
  }

  .seccion {
    font-size: 0.95rem;
  }

  /* Presentación */
  .presentacion > h1 {
    font-size: 2rem;
  }

  .presentacion > h2 {
    font-size: 3.5rem;
  }

  /* Sobre mi */
  .div-presentacion {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .sobre-mi {grid-column: 1 / -1;}

  .imagen-port {
    grid-column: 2 / 3;
    max-width: 280px;
  }

  /* Herramientas */
  .tools {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  /* Proyectos */
  .projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }

  /* Contacto */
  .contacto {
    grid-template-columns: repeat(2, 1fr);
  }

  .datos-port {
    grid-column: 1 / -1;
  }

  .contact-form-container {
    grid-column: 1 / -1;
  }
}

/* ============================================
   DESKTOP SMALL - (1025px - 1280px)
   ============================================ */
@media (min-width: 1025px) and (max-width: 1280px) {
  .contacto {
    grid-template-columns: repeat(3, 1fr);
  }

  .datos-port {
    grid-column: 1 / 2;
  }

  .contact-form-container {
    grid-column: 2 / -1;
  }
}

/* ============================================
   UTILIDADES
   ============================================ */

/* Prevenir scroll cuando el menú está abierto */
body.menu-open {
  overflow: hidden;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Optimización para pantallas de alta densidad */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .port-img,
  .imagen-port,
  .timeline-image {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}