/* ============================================================
   Plinth — Educación en Contabilidad y Análisis Financiero
   Estilo: Informe Financiero — limpio, profesional, legible
   ============================================================ */

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

:root {
  --color-navy: #1b2b45;
  --color-navy-dark: #101c30;
  --color-blue-accent: #2b4f81;
  --color-gray-light: #e7e9ec;
  --color-gray-mid: #98a1ac;
  --color-white-warm: #faf8f4;
  --color-white: #ffffff;
  --color-text: #232a33;
  --color-text-muted: #5b6470;
  --color-border: #dcdfe3;
  --font-sans: 'IBM Plex Sans', Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --radius: 4px;
  --max-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-white-warm);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--color-blue-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.5px;
}

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

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
}

.main-nav a:hover {
  color: var(--color-blue-accent);
  text-decoration: none;
  border-bottom: 2px solid var(--color-blue-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  background-color: var(--color-navy);
  display: block;
}

/* ---------- Hero ---------- */
.hero {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: 64px 0;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-text p {
  font-size: 18px;
  color: var(--color-gray-light);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-image {
  flex: 1;
}

.hero-image img {
  border-radius: var(--radius);
}

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--color-gray-light);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-white);
}

.btn-outline:hover {
  background-color: rgba(255,255,255,0.1);
  text-decoration: none;
}

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

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

/* ---------- Sections ---------- */
section {
  padding: 64px 0;
}

.section-alt {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 16px;
  max-width: 680px;
  margin-bottom: 40px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-blue-accent);
  margin-bottom: 10px;
  display: block;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

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

.card h3 {
  color: var(--color-navy);
  font-size: 19px;
  margin-bottom: 12px;
}

.card p {
  color: var(--color-text-muted);
  font-size: 15px;
}

.data-line {
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
  margin-top: 18px;
}

.stat-block {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-item {
  border-left: 3px solid var(--color-blue-accent);
  padding-left: 16px;
}

.stat-item .num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  color: var(--color-navy);
  display: block;
}

.stat-item .label {
  color: var(--color-text-muted);
  font-size: 14px;
}

/* ---------- Article ---------- */
.article-hero {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
}

.article-body h2 {
  color: var(--color-navy);
  font-size: 24px;
  margin: 36px 0 14px;
}

.article-body h3 {
  color: var(--color-navy);
  font-size: 19px;
  margin: 28px 0 12px;
}

.article-body p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.article-body ul, .article-body ol {
  margin: 0 0 16px 24px;
  color: var(--color-text);
}

.article-body li {
  margin-bottom: 8px;
}

.article-body img {
  border-radius: var(--radius);
  margin: 24px 0;
}

.article-body blockquote {
  border-left: 3px solid var(--color-blue-accent);
  padding-left: 20px;
  color: var(--color-text-muted);
  font-style: italic;
  margin: 24px 0;
}

table.fin-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

table.fin-table th, table.fin-table td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
}

table.fin-table th {
  background-color: var(--color-gray-light);
  color: var(--color-navy);
  font-weight: 600;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 16px 0;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

/* ---------- List Pages (blog, resources, faq) ---------- */
.post-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

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

.post-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

.post-card-body .eyebrow {
  margin-bottom: 8px;
}

.post-card-body h3 {
  color: var(--color-navy);
  font-size: 19px;
  margin-bottom: 10px;
}

.post-card-body p {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-bottom: 14px;
}

.post-card-body a.read-more {
  font-weight: 600;
  font-size: 14px;
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-navy);
  font-size: 16px;
}

.faq-answer {
  color: var(--color-text-muted);
  margin-top: 12px;
  display: none;
  font-size: 15px;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-toggle {
  font-size: 20px;
  color: var(--color-blue-accent);
  transition: transform 0.2s ease;
}

/* ---------- Glossary ---------- */
.glossary-letter {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--color-blue-accent);
  border-bottom: 2px solid var(--color-navy);
  padding-bottom: 8px;
  margin: 36px 0 18px;
}

.glossary-term {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.glossary-term dt {
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 6px;
}

.glossary-term dd {
  color: var(--color-text-muted);
  font-size: 15px;
}

/* ---------- Team ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.team-card img {
  border-radius: var(--radius);
  width: 100%;
  height: 260px;
  object-fit: cover;
  margin-bottom: 16px;
}

.team-card h3 {
  color: var(--color-navy);
  font-size: 17px;
  margin-bottom: 4px;
}

.team-card span {
  color: var(--color-text-muted);
  font-size: 14px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-navy);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 15px;
  background-color: var(--color-white);
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--color-blue-accent);
}

#form-success {
  display: none;
  background-color: #eaf3ea;
  border: 1px solid #a9cdae;
  color: #23572b;
  padding: 16px 18px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 15px;
}

#form-success.show {
  display: block;
}

.info-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.info-block h3 {
  color: var(--color-navy);
  margin-bottom: 16px;
}

.info-line {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--color-text-muted);
}

.info-line strong {
  color: var(--color-navy);
  min-width: 90px;
  display: inline-block;
}

/* ---------- Policy pages ---------- */
.policy-body {
  max-width: 780px;
  margin: 0 auto;
}

.policy-body h2 {
  color: var(--color-navy);
  font-size: 22px;
  margin: 32px 0 12px;
}

.policy-body h3 {
  color: var(--color-navy);
  font-size: 17px;
  margin: 22px 0 10px;
}

.policy-body p {
  margin-bottom: 14px;
  color: var(--color-text);
}

.policy-body ul {
  margin: 0 0 14px 22px;
}

.policy-body li {
  margin-bottom: 6px;
}

.policy-updated {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

/* ---------- Sitemap ---------- */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.sitemap-grid h3 {
  color: var(--color-navy);
  margin-bottom: 14px;
  font-size: 16px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.sitemap-grid ul {
  list-style: none;
}

.sitemap-grid li {
  margin-bottom: 10px;
  font-size: 15px;
}

/* ---------- Footer ---------- */
.site-footer {
  background-color: var(--color-navy);
  color: var(--color-gray-light);
  padding: 56px 0 24px;
}

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

.footer-col h4 {
  color: var(--color-white);
  font-size: 15px;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col p {
  color: var(--color-gray-mid);
  font-size: 14px;
  margin-bottom: 10px;
}

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

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--color-gray-light);
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-gray-mid);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { flex-direction: column; }
  .grid-3, .team-grid, .sitemap-grid { grid-template-columns: repeat(2, 1fr); }
  .post-list, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2, .team-grid, .sitemap-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 30px; }
  .header-inner.open + .main-nav,
  .main-nav.open { display: block; }
}

.main-nav.open ul {
  flex-direction: column;
  padding: 20px 24px;
}