/* ============================================
   contadoresya.com.ar — Estilos globales
   ============================================ */

/* --- Variables --- */
:root {
  /* Colores */
  --color-primary: #1a365d;
  --color-primary-light: #2a4a7f;
  --color-secondary: #2f855a;
  --color-secondary-light: #38a169;
  --color-accent: #ed8936;
  --color-bg: #ffffff;
  --color-bg-alt: #f7fafc;
  --color-bg-card: #ffffff;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-text-heading: #1a202c;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;

  /* Tipografía */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Espaciado */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --content-width: 780px;
  --sidebar-width: 300px;
  --header-height: 64px;

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

  /* Bordes */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transiciones */
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-secondary);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: 2rem; margin-bottom: var(--space-lg); }
h2 { font-size: 1.5rem; margin-bottom: var(--space-md); margin-top: var(--space-2xl); }
h3 { font-size: 1.25rem; margin-bottom: var(--space-sm); margin-top: var(--space-xl); }
h4 { font-size: 1.1rem; margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
}

ul, ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

li {
  margin-bottom: var(--space-xs);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 960px) {
  .layout {
    grid-template-columns: 1fr var(--sidebar-width);
  }
}

.content {
  min-width: 0;
}

/* --- Header --- */
.header {
  background: var(--color-primary);
  color: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: white;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
}

.header-logo:hover {
  color: white;
  opacity: 0.9;
}

.header-logo .logo-icon {
  background: var(--color-secondary);
  color: white;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
}

.header-nav {
  display: none;
  gap: var(--space-lg);
  list-style: none;
  padding: 0;
  margin: 0;
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
  }
}

.header-nav a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
  color: white;
}

/* Mobile menu button */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile menu */
.mobile-nav {
  display: none;
  background: var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav.open {
  display: block;
}

.mobile-nav a {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-sm) 0;
  font-size: 0.95rem;
}

.mobile-nav a:hover {
  color: white;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: var(--space-md) 0;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.breadcrumbs a {
  color: var(--color-text-light);
}

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

.breadcrumbs span {
  margin: 0 var(--space-xs);
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  padding: var(--space-3xl) 0;
  text-align: center;
}

.hero h1 {
  color: white;
  font-size: 2.25rem;
  max-width: 700px;
  margin: 0 auto var(--space-md);
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-3xl) 0;
  }
  .hero h1 {
    font-size: 2.75rem;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  border: none;
  font-family: var(--font-main);
}

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

.btn-primary:hover {
  background: var(--color-secondary-light);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: white;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

/* --- Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: inherit;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

.card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* --- Article Content --- */
.article-content {
  max-width: var(--content-width);
}

.article-content h2 {
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border-light);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-lg);
}

.article-content li {
  margin-bottom: var(--space-sm);
}

.article-content blockquote {
  border-left: 4px solid var(--color-secondary);
  background: var(--color-bg-alt);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-lg) 0;
  font-style: italic;
}

.article-content a {
  color: var(--color-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover {
  color: var(--color-primary);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

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

th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
}

tbody tr:hover {
  background: var(--color-bg-alt);
}

tbody tr:nth-child(even) {
  background: var(--color-bg-alt);
}

/* Info boxes */
.info-box {
  background: #ebf8ff;
  border-left: 4px solid #3182ce;
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-lg) 0;
}

.info-box.warning {
  background: #fffff0;
  border-left-color: #d69e2e;
}

.info-box.success {
  background: #f0fff4;
  border-left-color: #38a169;
}

.info-box strong {
  display: block;
  margin-bottom: var(--space-xs);
}

/* --- Calculator --- */
.calculator {
  background: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}

.calculator h3 {
  margin-top: 0;
  color: var(--color-primary);
  text-align: center;
}

.calc-form {
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

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

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-main);
  transition: border-color var(--transition);
  background: white;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.calc-result {
  background: white;
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
  display: none;
}

.calc-result.visible {
  display: block;
}

.calc-result h4 {
  color: var(--color-secondary);
  margin-top: 0;
  text-align: center;
  font-size: 1.2rem;
}

.calc-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.calc-detail-item {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
}

.calc-detail-item .label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.calc-detail-item .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-xs);
}

.calc-category {
  text-align: center;
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: var(--space-md) 0;
}

/* --- Sidebar --- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.sidebar-section {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.sidebar-section h4 {
  margin-top: 0;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
  font-size: 1rem;
}

.sidebar-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-links li {
  margin-bottom: var(--space-sm);
}

.sidebar-links a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.sidebar-links a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Ad placeholder */
.ad-slot {
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ad-slot-sidebar {
  min-height: 600px;
}

.ad-slot-content {
  min-height: 100px;
  margin: var(--space-xl) 0;
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer h4 {
  color: white;
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
  margin-top: 0;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer a:hover {
  color: white;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: 0.85rem;
}

/* --- Section headers --- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-header h2 {
  margin-top: 0;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 600px;
  margin: var(--space-sm) auto 0;
}

/* --- Featured articles list --- */
.featured-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.featured-list li {
  margin-bottom: var(--space-md);
}

.featured-list a {
  display: block;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.featured-list a:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.featured-list .article-title {
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-xs);
}

.featured-list .article-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.featured-list .article-tag {
  display: inline-block;
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-top: var(--space-xs);
}

/* --- Checklist --- */
.checklist {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.checklist li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-xl);
  position: relative;
}

.checklist li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-secondary);
  font-weight: bold;
}

/* --- Step by step --- */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.steps li {
  counter-increment: step;
  padding: var(--space-lg);
  padding-left: 4rem;
  position: relative;
  border-left: 2px solid var(--color-border);
  margin-left: 1.25rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: -1rem;
  top: var(--space-lg);
  width: 2rem;
  height: 2rem;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.steps li strong {
  display: block;
  margin-bottom: var(--space-xs);
}

/* --- FAQ --- */
.faq {
  margin: var(--space-xl) 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-lg) 0;
}

.faq-item h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.faq-item p {
  margin-top: var(--space-sm);
  margin-bottom: 0;
}

/* --- Responsive utilities --- */
.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: initial;
  }
  .hide-desktop {
    display: none;
  }
}

/* --- Print styles --- */
@media print {
  .header, .footer, .sidebar, .ad-slot, .menu-toggle {
    display: none !important;
  }
  .layout {
    grid-template-columns: 1fr !important;
  }
  body {
    font-size: 12pt;
    line-height: 1.5;
  }
}