/* ==========================================================================
   Welder — Análisis Contable
   Estilo: Financial Insight Elegance
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Lora:wght@500;600;700&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #f3f5f7;
  --color-surface: #ffffff;
  --color-surface-alt: #eef1f4;
  --color-primary: #0f2c4c;
  --color-primary-dark: #081b30;
  --color-accent: #1f8a82;
  --color-accent-dark: #146b64;
  --color-text: #1e2a35;
  --color-text-muted: #55636f;
  --color-border: #dbe2e8;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-card: 0 2px 10px rgba(15, 44, 76, 0.08);
  --font-heading: 'Lora', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 16px;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.3;
  margin: 0 0 0.6em;
  font-weight: 600;
}

h1 { font-size: 2.4rem; }
h2 { font-size: 1.85rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1.1em; }

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-dark); text-decoration: underline; }

ul, ol { margin: 0 0 1.2em; padding-left: 1.4em; }
li { margin-bottom: 0.4em; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-surface);
  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: 16px 24px;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo span {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.main-nav ul {
  display: flex;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.94rem;
}

.main-nav a:hover { color: var(--color-accent); text-decoration: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--color-surface);
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero h1 { font-size: 2.6rem; margin-bottom: 0.5em; }
.hero .lead { font-size: 1.15rem; color: var(--color-text-muted); margin-bottom: 1.6em; max-width: 560px; }
.hero-image img { border-radius: var(--radius-md); box-shadow: var(--shadow-card); }

.page-hero {
  background: var(--color-primary);
  color: #eef2f5;
  padding: 56px 0 46px;
}

.page-hero h1 { color: #ffffff; margin-bottom: 0.4em; }
.page-hero .lead { color: #c6d3de; max-width: 700px; font-size: 1.05rem; }

.breadcrumbs { font-size: 0.85rem; color: #a7bbc9; margin-bottom: 16px; }
.breadcrumbs a { color: #cfdbe4; }
.breadcrumbs a:hover { color: #ffffff; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}
.btn-primary:hover { background: var(--color-accent-dark); text-decoration: none; }

.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; text-decoration: none; }

.btn-outline-light {
  background: transparent;
  border-color: #ffffff;
  color: #ffffff;
}
.btn-outline-light:hover { background: #ffffff; color: var(--color-primary); text-decoration: none; }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--color-surface); }
.section-tight { padding: 44px 0; }

.section-header { max-width: 720px; margin: 0 auto 40px; text-align: center; }
.section-header p { color: var(--color-text-muted); font-size: 1.05rem; }
.eyebrow {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 10px;
}

/* ---------- Grid & Cards ---------- */
.grid {
  display: grid;
  gap: 28px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.card h3 { margin-bottom: 0.5em; }
.card .card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: 16px;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}
.article-card img { height: 200px; object-fit: cover; width: 100%; }
.article-card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.article-meta { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.05em; }
.article-card h3 { font-size: 1.15rem; }
.article-card p { color: var(--color-text-muted); font-size: 0.95rem; flex-grow: 1; }
.read-more { font-weight: 600; font-size: 0.9rem; margin-top: auto; }

/* ---------- Stats / Info blocks ---------- */
.info-strip {
  background: var(--color-primary);
  color: #ffffff;
  padding: 40px 0;
}
.info-strip .grid { text-align: center; }
.info-strip h3 { color: #ffffff; font-size: 1.9rem; margin-bottom: 0.2em; }
.info-strip p { color: #b9c9d6; margin: 0; font-size: 0.9rem; }

/* ---------- Content / Article ---------- */
.content-wrap {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.article-body h2 { margin-top: 1.6em; }
.article-body h3 { margin-top: 1.3em; }
.article-body img { border-radius: var(--radius-md); margin: 1.5em 0; box-shadow: var(--shadow-card); }
.article-body blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 6px 20px;
  margin: 1.6em 0;
  font-style: italic;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
}
.article-body table, .legal-content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 0.94rem; }
.article-body th, .article-body td, .legal-content th, .legal-content td { border: 1px solid var(--color-border); padding: 10px 14px; text-align: left; }
.article-body th, .legal-content th { background: var(--color-surface-alt); color: var(--color-primary); }

.sidebar-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-box h4 { margin-bottom: 0.8em; }
.sidebar-box ul { padding-left: 1.1em; }
.sidebar-box li { font-size: 0.92rem; }

/* ---------- Text-only / Policy pages ---------- */
.legal-content h2 { margin-top: 1.8em; }
.legal-content h3 { margin-top: 1.2em; }
.legal-content { max-width: 820px; margin: 0 auto; background: var(--color-surface); padding: 44px 52px; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
.legal-updated { color: var(--color-text-muted); font-size: 0.88rem; margin-bottom: 2em; }

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-question::after { content: "−"; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer { max-height: 500px; padding-bottom: 20px; }
.faq-answer p { color: var(--color-text-muted); }

/* ---------- Glossary ---------- */
.glossary-list { max-width: 880px; margin: 0 auto; }
.glossary-letter {
  font-family: var(--font-heading);
  color: var(--color-accent);
  font-size: 1.5rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 8px;
  margin-top: 2em;
}
.glossary-term { padding: 16px 0; border-bottom: 1px solid var(--color-border); }
.glossary-term dt { font-weight: 700; color: var(--color-primary); font-family: var(--font-heading); font-size: 1.05rem; }
.glossary-term dd { margin: 6px 0 0; color: var(--color-text-muted); }

/* ---------- Forms ---------- */
.form-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-card);
}
.form-group { margin-bottom: 20px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.92rem; color: var(--color-primary); }
input, select, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--color-accent); border-color: var(--color-accent); }
textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.82rem; color: var(--color-text-muted); margin-top: -8px; margin-bottom: 20px; }

.form-success {
  display: none;
  background: #e6f4f1;
  border: 1px solid var(--color-accent);
  color: var(--color-accent-dark);
  padding: 18px 22px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-weight: 600;
}
.form-success.visible { display: block; }

/* ---------- Contact info blocks ---------- */
.contact-info-list { list-style: none; padding: 0; margin: 0; }
.contact-info-list li {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}
.contact-info-list strong { display: block; color: var(--color-primary); font-family: var(--font-heading); }

.map-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  height: 280px;
}
.map-frame iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Pagination / Breadcrumb list (sitemap) ---------- */
.sitemap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; }
.sitemap-col h3 { border-bottom: 2px solid var(--color-border); padding-bottom: 10px; }
.sitemap-col ul { list-style: none; padding: 0; }
.sitemap-col li { margin-bottom: 10px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: #b7c4cf;
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 40px;
}
.footer-col h3 { color: #ffffff; font-size: 1rem; margin-bottom: 1em; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: #b7c4cf; font-size: 0.92rem; }
.footer-col a:hover { color: #ffffff; }
.footer-logo { font-size: 1.5rem; margin-bottom: 14px; color: #ffffff; }
.footer-address, .footer-phone { font-size: 0.88rem; color: #9db0bd; }
.footer-bottom {
  border-top: 1px solid #1c3350;
  padding: 22px 24px;
  font-size: 0.8rem;
  color: #7f93a1;
  text-align: center;
}

/* ---------- Info boxes / lists (contact, articles) ---------- */
.info-box {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}
.info-box h3 { font-size: 1rem; margin-bottom: 0.4em; }
.info-box p { margin-bottom: 0; color: var(--color-text-muted); }
.info-box ul { margin-bottom: 0; }

.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--color-text-muted);
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.checkbox-group { display: flex; align-items: flex-start; gap: 10px; }
.checkbox-group input[type="checkbox"] { width: auto; margin-top: 4px; flex-shrink: 0; }
.checkbox-group label { margin-bottom: 0; font-weight: 400; color: var(--color-text-muted); font-size: 0.88rem; }

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

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-lg { margin-top: 40px; }
.mt-md { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }
.flex-center { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; }
.gap-md { gap: 16px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .content-wrap { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .sitemap-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .main-nav.open { max-height: 520px; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 10px 24px 20px; }
  .main-nav li { border-bottom: 1px solid var(--color-border); }
  .main-nav a { display: block; padding: 12px 0; }
  .nav-toggle { display: flex; }
  h1 { font-size: 1.9rem; }
  .hero h1 { font-size: 2rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .sitemap-grid { grid-template-columns: 1fr; }
  .legal-content { padding: 30px 22px; }
}