/* ==========================================================================
   Nodal — Portal de Análisis de Tendencias Contables
   Hoja de estilos global
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@400;500;600;700&family=Merriweather:wght@400;700&display=swap');

:root {
  --color-white: #ffffff;
  --color-navy: #163a5f;
  --color-navy-dark: #0e2740;
  --color-navy-light: #2c5f8a;
  --color-gray-bg: #f4f6f8;
  --color-gray-line: #dfe4e9;
  --color-text: #2a323c;
  --color-text-soft: #5a6472;
  --radius: 4px;
  --max-width: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Source Sans 3', Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.65;
  font-size: 16px;
}

h1, h2, h3, h4 {
  font-family: 'Merriweather', Georgia, serif;
  color: var(--color-navy-dark);
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; margin-bottom: 1rem; }
h3 { font-size: 1.3rem; margin-bottom: 0.6rem; }

p { margin-bottom: 1rem; color: var(--color-text); }

a {
  color: var(--color-navy-light);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

ul, ol { margin: 0 0 1rem 1.4rem; }
li { margin-bottom: 0.4rem; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
  border-bottom: 1px solid var(--color-gray-line);
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-family: 'Merriweather', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-navy-dark);
  letter-spacing: 0.5px;
}
.logo span { color: var(--color-navy-light); }

.main-nav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-navy);
  text-decoration: none;
  border-bottom: 2px solid var(--color-navy-light);
  padding-bottom: 4px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--color-navy-dark);
  display: block;
}

/* ==========================================================================
   Hero (sin plaquetas ni banners promocionales)
   ========================================================================== */

.hero {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-line);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-text-soft);
  max-width: 540px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.hero-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-hero {
  background: var(--color-gray-bg);
  border-bottom: 1px solid var(--color-gray-line);
  padding: 56px 24px;
  text-align: left;
}

.page-hero .container {
  max-width: 780px;
}

.page-hero p {
  color: var(--color-text-soft);
  font-size: 1.05rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin-bottom: 14px;
}
.breadcrumb a { color: var(--color-text-soft); }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--color-navy);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-navy-dark);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}
.btn-outline:hover {
  background: var(--color-navy);
  color: var(--color-white);
  text-decoration: none;
}

/* ==========================================================================
   Sections generales
   ========================================================================== */

section {
  padding: 60px 0;
}

.section-alt {
  background: var(--color-gray-bg);
}

.section-title {
  max-width: 680px;
  margin-bottom: 40px;
}

.section-title p {
  color: var(--color-text-soft);
}

/* Grid de tarjetas */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--color-white);
}

.card h3 { margin-bottom: 10px; }
.card p { color: var(--color-text-soft); font-size: 0.95rem; }

/* Artículos / Blog */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.article-card {
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-white);
}

.article-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0;
}

.article-card-body {
  padding: 22px;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-navy);
  border: 1px solid var(--color-navy-light);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

/* Página de artículo individual */
.article-header {
  padding: 48px 24px 32px;
  border-bottom: 1px solid var(--color-gray-line);
}

.article-header .container { max-width: 760px; }

.article-cover img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  margin: 0 auto 40px;
  max-width: var(--max-width);
}

.article-body {
  max-width: 760px;
  margin: 40px auto;
  padding: 0 24px;
  font-size: 1.05rem;
}

.article-body h2 { margin-top: 2rem; }
.article-body blockquote {
  border-left: 3px solid var(--color-navy-light);
  padding-left: 20px;
  color: var(--color-text-soft);
  font-style: italic;
  margin: 1.6rem 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4rem 0;
}
.article-body th, .article-body td {
  border: 1px solid var(--color-gray-line);
  padding: 10px 14px;
  text-align: left;
  font-size: 0.95rem;
}
.article-body th {
  background: var(--color-gray-bg);
}

.related-articles {
  border-top: 1px solid var(--color-gray-line);
  padding-top: 40px;
}

/* Equipo */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.team-card {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  padding: 24px;
}

.team-card img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  border-radius: 50%;
  flex-shrink: 0;
}

.team-role {
  font-size: 0.85rem;
  color: var(--color-navy-light);
  font-weight: 600;
  margin-bottom: 8px;
}

/* Tabla de valores / metodología */
.value-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.value-item {
  padding: 22px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
}

.value-item h3 { color: var(--color-navy); }

/* Timeline metodología */
.timeline {
  border-left: 2px solid var(--color-gray-line);
  padding-left: 28px;
  margin-left: 10px;
}
.timeline-step {
  margin-bottom: 32px;
  position: relative;
}
.timeline-step::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--color-navy-light);
  border-radius: 50%;
}

/* FAQ */
.faq-list { margin-top: 8px; }
.faq-item {
  border-bottom: 1px solid var(--color-gray-line);
  padding: 20px 0;
}
.faq-item summary {
  font-weight: 600;
  color: var(--color-navy-dark);
  cursor: pointer;
  font-size: 1.05rem;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1.2rem;
  color: var(--color-navy-light);
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p {
  color: var(--color-text-soft);
  margin-top: 12px;
  margin-bottom: 0;
}
.faq-question {
  font-weight: 600;
  color: var(--color-navy-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
}
.faq-answer {
  color: var(--color-text-soft);
  margin-top: 12px;
  display: none;
}
.faq-item.open .faq-answer { display: block; }
.faq-icon { font-size: 1.3rem; color: var(--color-navy-light); }

/* Recursos */
.section-intro {
  max-width: 720px;
  color: var(--color-text-soft);
  font-size: 1.05rem;
  margin-bottom: 40px;
}
.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.resource-card {
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--color-white);
}
.resource-card h3 {
  color: var(--color-navy);
  font-size: 1.1rem;
}
.resource-card p {
  color: var(--color-text-soft);
  font-size: 0.95rem;
  margin-bottom: 0;
}
.callout-box {
  background: var(--color-gray-bg);
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  padding: 36px;
  text-align: left;
}
.callout-box h2 { margin-bottom: 10px; }
.callout-box p {
  color: var(--color-text-soft);
  max-width: 640px;
  margin-bottom: 20px;
}

/* Page hero variants */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.8rem;
  color: var(--color-navy-light);
  font-weight: 600;
  margin-bottom: 10px;
}
.page-hero--small { padding: 40px 24px; }
.page-hero__lead {
  color: var(--color-text-soft);
  font-size: 1.05rem;
}
.container--narrow { max-width: 780px; }

/* Glosario */
.glossary-letter {
  font-family: 'Merriweather', serif;
  font-size: 1.5rem;
  color: var(--color-navy-light);
  border-bottom: 1px solid var(--color-gray-line);
  padding-bottom: 6px;
  margin: 40px 0 16px;
}
.glossary-term { margin-bottom: 18px; }
.glossary-term dt {
  font-weight: 700;
  color: var(--color-navy-dark);
}
.glossary-term dd {
  color: var(--color-text-soft);
  margin-left: 0;
}

/* Recursos */
.resource-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.resource-item {
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  padding: 20px;
}
.resource-item span {
  font-size: 0.78rem;
  color: var(--color-navy-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Formulario de contacto */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-item {
  margin-bottom: 24px;
}
.contact-info-item h3 { font-size: 1rem; margin-bottom: 4px; }
.contact-info-item p { color: var(--color-text-soft); margin-bottom: 0; }

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.92rem;
  color: var(--color-navy-dark);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--color-white);
  color: var(--color-text);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-navy-light);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin-bottom: 20px;
}
.form-check input { width: auto; margin-top: 4px; }

#form-success {
  display: none;
  background: #eaf3ec;
  border: 1px solid #9fc9a8;
  color: #2c5c39;
  padding: 16px 20px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 0.95rem;
}
#form-success.visible { display: block; }

.map-embed {
  border: 1px solid var(--color-gray-line);
  border-radius: var(--radius);
  height: 260px;
  margin-top: 20px;
  overflow: hidden;
}
.map-embed iframe { width: 100%; height: 100%; border: 0; }

/* Sitemap */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.sitemap-col h3 {
  border-bottom: 1px solid var(--color-gray-line);
  padding-bottom: 10px;
}
.sitemap-col ul { margin-left: 0; list-style: none; }
.sitemap-col li { margin-bottom: 10px; }

/* Legal pages */
.legal-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 50px 24px 80px;
}
.legal-content h2 { margin-top: 2.2rem; }
.legal-content h3 { margin-top: 1.4rem; }
.legal-content p, .legal-content li { color: var(--color-text-soft); }
.legal-updated {
  font-size: 0.85rem;
  color: var(--color-text-soft);
  margin-bottom: 30px;
}

/* CTA banda inferior */
.cta-band {
  background: var(--color-navy-dark);
  color: var(--color-white);
  padding: 56px 0;
  text-align: center;
}
.cta-band h2 { color: var(--color-white); }
.cta-band p { color: #c7d3de; max-width: 560px; margin: 0 auto 26px; }
.cta-band .btn-outline {
  color: var(--color-white);
  border-color: var(--color-white);
}
.cta-band .btn-outline:hover {
  background: var(--color-white);
  color: var(--color-navy-dark);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--color-navy-dark);
  color: #c7d3de;
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand .logo { color: var(--color-white); }
.footer-brand .logo span { color: #8fb4d4; }
.footer-brand p { color: #9db2c4; font-size: 0.9rem; margin-top: 12px; }

.footer-col h4 {
  color: var(--color-white);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.95rem;
  margin-bottom: 16px;
  letter-spacing: 0.4px;
}
.footer-col ul { list-style: none; margin-left: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #9db2c4; font-size: 0.9rem; }
.footer-col a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid #244a6b;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: #7f97ac;
}
.footer-bottom a { color: #7f97ac; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-media { order: -1; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .article-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .value-list { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .sitemap-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .resource-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  h1 { font-size: 1.9rem; }
  .card-grid { grid-template-columns: 1fr; }
  .resource-list { grid-template-columns: 1fr; }
  .sitemap-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}