/* ===================================
   IA PORTAL PRO - ESTILOS GLOBALES
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #f3f4f6;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --border-color: #e5e7eb;
  --white: #ffffff;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: #f9fafb;
}

/* ===================================
   CONTENEDOR Y LAYOUT
   =================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container-sm {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===================================
   HEADER Y NAVEGACIÓN
   =================================== */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--white);
  box-shadow: var(--shadow);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-dark);
  text-decoration: none;
}

.logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-dark);
  text-decoration: none;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--primary-color);
}

.nav-links a.active {
  color: var(--primary-color);
  font-weight: 600;
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===================================
   BOTONES
   =================================== */

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: #e5e7eb;
  color: var(--text-dark);
}

.btn-secondary:hover {
  background-color: #d1d5db;
}

/* ===================================
   FEATURES SECTION
   =================================== */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 3rem 0;
}

.feature-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-light);
}

/* ===================================
   GRID DE ARTÍCULOS
   =================================== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.article-card {
  background-color: var(--white);
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.article-header {
  height: 150px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.article-card.chatgpt .article-header {
  background: linear-gradient(135deg, #10b981 0%, #3b82f6 100%);
}

.article-card.claude .article-header {
  background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
}

.article-card.gemini .article-header {
  background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
}

.article-card.copilot .article-header {
  background: linear-gradient(135deg, #3b82f6 0%, #4f46e5 100%);
}

.article-card.llama .article-header {
  background: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
}

.article-card.perplexity .article-header {
  background: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
}

.article-card.midjourney .article-header {
  background: linear-gradient(135deg, #ec4899 0%, #a855f7 100%);
}

.article-card.stable .article-header {
  background: linear-gradient(135deg, #fbbf24 0%, #f97316 100%);
}

.article-card.dalle .article-header {
  background: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
}

.article-card.jasper .article-header {
  background: linear-gradient(135deg, #ef4444 0%, #ec4899 100%);
}

.article-card.runway .article-header {
  background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
}

.article-card.manus .article-header {
  background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
}

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

.article-category {
  display: inline-block;
  background-color: #dbeafe;
  color: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  width: fit-content;
}

.article-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.article-subtitle {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.article-description {
  color: var(--text-light);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.article-link {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-link:hover {
  gap: 1rem;
}

/* ===================================
   BÚSQUEDA Y FILTROS
   =================================== */

.search-container {
  margin-bottom: 2rem;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  padding-left: 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%236b7280" stroke-width="2"><circle cx="11" cy="11" r="8"></circle><path d="m21 21-4.35-4.35"></path></svg>');
  background-repeat: no-repeat;
  background-position: 0.75rem center;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 9999px;
  background-color: var(--secondary-color);
  color: var(--text-dark);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.filter-btn.active {
  background-color: var(--primary-color);
  color: var(--white);
}

.filter-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

/* ===================================
   PÁGINA DE ARTÍCULO DETALLADO
   =================================== */

.article-detail {
  background-color: var(--white);
  padding: 3rem 0;
  margin: 2rem 0;
  border-radius: 0.5rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
  color: var(--text-light);
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-detail h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.article-detail h2 {
  font-size: 1.75rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.article-detail h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-dark);
}

.article-detail p {
  margin-bottom: 1rem;
  line-height: 1.8;
  color: var(--text-light);
}

.article-detail ul,
.article-detail ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

.article-detail li {
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.article-cta {
  background-color: #eff6ff;
  border-left: 4px solid var(--primary-color);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: 0.25rem;
}

.article-cta h3 {
  margin-top: 0;
}

/* ===================================
   FORMULARIO DE CONTACTO
   =================================== */

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-card {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.contact-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.contact-card h3 {
  margin-bottom: 0.5rem;
}

.contact-card p {
  color: var(--text-light);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-dark);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.form-submit {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.form-submit:hover {
  background-color: var(--primary-dark);
}

/* ===================================
   CTA SECTION
   =================================== */

.cta-section {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 3rem 0;
  text-align: center;
  margin: 3rem 0;
  border-radius: 0.5rem;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--white);
}

.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

/* ===================================
   ARTÍCULOS RELACIONADOS
   =================================== */

.related-articles {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.related-articles h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.related-card {
  background-color: var(--white);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.related-card:hover {
  box-shadow: var(--shadow-lg);
}

.related-card h4 {
  margin-bottom: 0.5rem;
}

.related-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

/* ===================================
   FOOTER
   =================================== */

footer {
  background-color: #111827;
  color: #d1d5db;
  padding: 3rem 0 1rem;
  margin-top: 3rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-section a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.95rem;
}

/* ===================================
   PÁGINA 404
   =================================== */

.not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}

.not-found-icon {
  font-size: 4rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.not-found h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.not-found p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 500px;
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

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

  .article-detail h1 {
    font-size: 1.75rem;
  }

  .article-detail h2 {
    font-size: 1.25rem;
  }

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

  .btn {
    width: 100%;
    text-align: center;
  }

  .article-meta {
    flex-direction: column;
    gap: 1rem;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: 0.5rem;
    font-size: 0.8rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

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

  .article-detail {
    padding: 1.5rem 0;
  }
}

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

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: 1rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.py-4 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}