/* ==========================================================================
   Variables CSS (Diseño y Tema Oscuro Elegante)
   ========================================================================== */
:root {
  /* Paleta de Colores */
  --color-bg-main: #0b1120; /* Negro azulado elegante */
  --color-bg-surface: #111827;
  --color-bg-surface-light: #1f2937;
  --color-text-main: #f3f4f6; /* Blanco cálido */
  --color-text-muted: #9ca3af; /* Gris claro */
  --color-accent: #10b981; /* Verde esmeralda / turquesa moderado */
  --color-accent-hover: #059669;
  --color-accent-subtle: rgba(16, 185, 129, 0.1);
  --color-border: #374151;
  --color-error: #ef4444;
  --color-success: #10b981;

  /* Tipografía */
  --font-family-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Espaciado y Layout */
  --container-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Otros */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
  
  /* Header Height */
  --header-height: 70px;
}

/* ==========================================================================
   Reset y Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height); /* Para que el menú no tape el contenido */
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  background: none;
  border: none;
  color: inherit;
}

button {
  cursor: pointer;
}

/* ==========================================================================
   Tipografía
   ========================================================================== */
h1, h2, h3, h4 {
  color: var(--color-text-main);
  line-height: 1.2;
  font-weight: var(--font-weight-bold);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.text-accent {
  color: var(--color-accent);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ==========================================================================
   Utilidades y Layout
   ========================================================================== */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
}

.section {
  padding: var(--spacing-xl) 0;
}

/* Visibilidad de foco para accesibilidad */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* Elementos solo para lectores de pantalla */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   Botones
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg-main);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
}

.btn-icon {
  margin-left: 0.5rem;
}

/* ==========================================================================
   Header y Navegación
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(11, 17, 32, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-main);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Menú Móvil Toggle */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-main);
  padding: 0.5rem;
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
}

.hero-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-md);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.hero-description {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.hero-features {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.feature-item svg {
  width: 16px;
  height: 16px;
  fill: var(--color-accent);
}



/* ==========================================================================
   Sección Sobre Mí
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-text {
  font-size: 1.125rem;
}

.about-text p {
  margin-bottom: 1.25rem;
}

.about-visual {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-sm);
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.profile-img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-md);
  object-fit: cover;
}

/* ==========================================================================
   Sección Proyectos
   ========================================================================== */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.filter-btn.active,
.filter-btn:hover {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(16, 185, 129, 0.3);
}

/* Mockup visual abstracto para imágenes temporales */
.project-image-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-bg-surface-light), var(--color-bg-main));
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.project-image-placeholder::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(var(--color-border) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.2;
}

.project-image-placeholder svg {
  width: 48px;
  height: 48px;
  fill: var(--color-border);
  z-index: 1;
}

.project-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-status {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  align-self: flex-start;
}

.project-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-desc {
  font-size: 0.95rem;
  flex: 1;
}

.project-tech {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  margin-top: 1rem;
}

.tech-tag {
  font-size: 0.75rem;
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.project-link:hover {
  color: var(--color-accent);
}

/* ==========================================================================
   Sección Servicios
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.service-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  transition: transform var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
}

.service-icon {
  width: 48px;
  height: 48px;
  background-color: var(--color-accent-subtle);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.service-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--color-accent);
}

.service-title {
  margin-bottom: 1rem;
}

/* ==========================================================================
   Sección Por qué yo / Beneficios
   ========================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.benefit-icon {
  width: 24px;
  height: 24px;
  fill: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

/* ==========================================================================
   Sección Proceso
   ========================================================================== */
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24px;
  width: 2px;
  background-color: var(--color-border);
}

.process-step {
  display: flex;
  gap: 2rem;
  position: relative;
}

.step-number {
  width: 50px;
  height: 50px;
  background-color: var(--color-bg-surface);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  flex-shrink: 0;
  z-index: 2;
}

.step-content {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  flex: 1;
}

.step-content h4 {
  margin-bottom: 0.5rem;
}

.step-content p {
  margin-bottom: 0;
}

/* ==========================================================================
   Sección Tecnologías
   ========================================================================== */
.tech-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  color: var(--color-text-muted);
}

.tech-item svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}



/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-banner {
  background-color: var(--color-accent-subtle);
  border-top: 1px solid rgba(16, 185, 129, 0.2);
  border-bottom: 1px solid rgba(16, 185, 129, 0.2);
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-text-main);
}

/* ==========================================================================
   Sección Contacto
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text-main);
}

.contact-details h4 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-regular);
}

.contact-details a, 
.contact-details p {
  font-size: 1.125rem;
  color: var(--color-text-main);
  font-weight: var(--font-weight-medium);
  margin-bottom: 0;
}

.contact-details a:hover {
  color: var(--color-accent);
}

.contact-form {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: var(--font-weight-medium);
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--color-bg-main);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.checkbox-group input {
  margin-top: 0.25rem;
  accent-color: var(--color-accent);
}

.checkbox-group label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.form-error {
  color: var(--color-error);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

.form-control.invalid {
  border-color: var(--color-error);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-main);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-link svg {
  width: 20px;
  height: 20px;
  fill: var(--color-text-muted);
  transition: fill var(--transition-fast);
}

.social-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.social-link:hover svg {
  fill: var(--color-accent);
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  width: 100%;
}

.footer-linux {
  font-size: 0.75rem;
  margin-top: 0.5rem;
  opacity: 0.7;
}

/* ==========================================================================
   Componentes Utilitarios
   ========================================================================== */
.scroll-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background-color: var(--color-accent);
  color: var(--color-bg-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  transform: translateY(20px);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-3px);
}

.scroll-top svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Clases para animaciones de intersección */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.appear {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Media Queries (Responsive)
   ========================================================================== */

/* Tablets y menores */
@media (max-width: 992px) {
  .about-grid, 
  .contact-grid {
    grid-template-columns: 1fr;
  }


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

/* Móviles */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 4rem;
    --spacing-lg: 3rem;
  }

  .mobile-menu-toggle {
    display: block;
    z-index: 1001;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-bg-surface);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-normal);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.25rem;
  }
  
  .process-steps::before {
    left: 20px;
  }
  
  .step-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .process-step {
    gap: 1rem;
  }
}

/* Accesibilidad: Reducir movimiento */
@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;
    transition: none;
  }
}

/* ==========================================================================
   WHATSAPP FLOAT
   ========================================================================== */
.whatsapp-float {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    background-color: #1ebe57;
    color: #fff;
}

.whatsapp-float svg {
    width: 35px;
    height: 35px;
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 15px;
        left: 15px;
        width: 50px;
        height: 50px;
    }
    
    .whatsapp-float svg {
        width: 30px;
        height: 30px;
    }
}