/* ============================================================
   Mundo del Motor — Hoja de estilos principal
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,400;0,700;1,400&family=Montserrat:wght@400;500;600;700&display=swap');

/* ── Variables ─────────────────────────────────────────── */
:root {
  --color-bg: #f6f5f2;
  --color-white: #ffffff;
  --color-dark: #1b1e2d;
  --color-accent: #bf3320;
  --color-accent-dark: #9a2918;
  --color-text: #2a2a2a;
  --color-muted: #5e5e5e;
  --color-border: #dedad4;
  --color-card: #ffffff;
  --color-tag-bg: #f0ede8;

  --font-body: 'Merriweather', Georgia, 'Times New Roman', serif;
  --font-ui: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --max-width: 1120px;
  --radius: 6px;
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
  --transition: 0.2s ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ── Layout helpers ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
.site-header {
  background-color: var(--color-dark);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-white);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.logo:hover { opacity: 0.85; }
.logo-icon {
  width: 34px;
  height: 34px;
  background-color: var(--color-accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  color: var(--color-white);
}
.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Main nav */
.main-nav {}
.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-list > li { position: relative; }
.nav-list > li > a,
.dropdown-btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.45rem 0.75rem;
  color: rgba(255,255,255,0.88);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 4px;
  transition: color var(--transition), background-color var(--transition);
  white-space: nowrap;
}
.nav-list > li > a:hover,
.nav-list > li > a[aria-current="page"],
.dropdown-btn:hover,
.dropdown-btn[aria-expanded="true"] {
  color: var(--color-white);
  background-color: rgba(255,255,255,0.1);
}
.dropdown-arrow {
  font-size: 0.65rem;
  transition: transform var(--transition);
}
.dropdown-btn[aria-expanded="true"] .dropdown-arrow {
  transform: rotate(180deg);
}

/* Dropdown menu */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 240px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 200;
}
.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu,
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu li a {
  display: block;
  padding: 0.6rem 1rem;
  font-family: var(--font-ui);
  font-size: 0.83rem;
  color: var(--color-text);
  font-weight: 500;
  transition: background-color var(--transition), color var(--transition);
}
.dropdown-menu li:first-child a { border-radius: var(--radius) var(--radius) 0 0; }
.dropdown-menu li:last-child a { border-radius: 0 0 var(--radius) var(--radius); }
.dropdown-menu li a:hover {
  background-color: var(--color-tag-bg);
  color: var(--color-accent);
}

/* ============================================================
   HERO — HOME PAGE
   ============================================================ */
.hero {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(191,51,32,0.18) 0%, transparent 60%);
  pointer-events: none;
}
.hero-label {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: rgba(191,51,32,0.15);
  border: 1px solid rgba(191,51,32,0.35);
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-family: var(--font-ui);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  max-width: 680px;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
.hero p {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 560px;
  color: rgba(255,255,255,0.78);
  margin-bottom: 2rem;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  letter-spacing: 0.01em;
  transition: background-color var(--transition);
}
.hero-cta:hover { background-color: var(--color-accent-dark); }

/* ============================================================
   FEATURED ARTICLES GRID — HOME
   ============================================================ */
.section-featured {
  padding: 4rem 0;
}
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}
.section-title {
  font-family: var(--font-ui);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.01em;
}
.section-link {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  transition: opacity var(--transition);
}
.section-link:hover { opacity: 0.75; }

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.articles-grid .card:first-child {
  grid-column: span 2;
}

.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-visual {
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
  background-color: var(--color-dark);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card:first-child .card-visual { height: 220px; }
.card-visual-icon {
  font-size: 3rem;
  opacity: 0.35;
  color: var(--color-white);
  pointer-events: none;
  user-select: none;
}
.card-visual-accent {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--color-accent);
}
.card-body {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--color-accent);
  margin-bottom: 0.6rem;
}
.card h2, .card h3 {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-dark);
  margin-bottom: 0.6rem;
}
.card:first-child h2 { font-size: 1.25rem; }
.card p {
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-muted);
  flex: 1;
  margin-bottom: 1rem;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
  transition: gap var(--transition);
}
.card-link:hover { gap: 0.55rem; }

/* ============================================================
   ABOUT SNIPPET — HOME
   ============================================================ */
.section-about {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 4rem 0;
  margin-bottom: 0;
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-inner h2 {
  font-family: var(--font-ui);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.about-inner p {
  font-family: var(--font-body);
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.78);
  margin-bottom: 1rem;
}
.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.value-item {
  background-color: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 1rem;
}
.value-icon {
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}
.value-item h3 {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.25rem;
}
.value-item p {
  font-family: var(--font-body);
  font-size: 0.78rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.6);
  margin: 0;
}

/* ============================================================
   PAGE HERO — INTERIOR PAGES
   ============================================================ */
.page-hero {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 3.5rem 0 3rem;
}
.page-hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.85rem;
}
.page-hero h1 {
  font-family: var(--font-ui);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  max-width: 760px;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.page-hero p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 600px;
  color: rgba(255,255,255,0.75);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.6);
}

/* ============================================================
   ARTICLE CONTENT
   ============================================================ */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  padding: 3rem 0;
  align-items: start;
}
.article-body {
  min-width: 0;
}
.article-body h2 {
  font-family: var(--font-ui);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
  letter-spacing: -0.01em;
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}
.article-body p {
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 1rem;
}
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.85;
  margin-bottom: 0.4rem;
}

.callout {
  background-color: #fff8f7;
  border-left: 4px solid var(--color-accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
}
.callout strong {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}
.callout p {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
}

/* Table of contents */
.toc {
  background-color: var(--color-tag-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}
.toc h2 {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin: 0 0 0.75rem;
  border: none;
  padding: 0;
}
.toc ol {
  padding-left: 1.25rem;
  margin: 0;
}
.toc li {
  font-family: var(--font-ui);
  font-size: 0.86rem;
  margin-bottom: 0.3rem;
  color: var(--color-text);
}
.toc a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: rgba(0,0,0,0.15);
  transition: color var(--transition);
}
.toc a:hover { color: var(--color-accent); }

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: 80px;
}
.sidebar-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}
.sidebar-card h3 {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: 0.85rem;
}
.related-list li {
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0;
}
.related-list li:last-child { border-bottom: none; padding-bottom: 0; }
.related-list a {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  display: block;
  transition: color var(--transition);
}
.related-list a:hover { color: var(--color-accent); }

/* ============================================================
   STATIC CONTENT PAGES (legal, about, contact)
   ============================================================ */
.content-page {
  padding: 3.5rem 0;
}
.content-page .content-wrap {
  max-width: 780px;
}
.content-page h2 {
  font-family: var(--font-ui);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-top: 2.25rem;
  margin-bottom: 0.65rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}
.content-page h2:first-child { margin-top: 0; }
.content-page h3 {
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}
.content-page p {
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 0.9rem;
}
.content-page ul, .content-page ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}
.content-page ul { list-style: disc; }
.content-page ol { list-style: decimal; }
.content-page li {
  font-family: var(--font-body);
  font-size: 0.94rem;
  line-height: 1.85;
  margin-bottom: 0.3rem;
}

.contact-email-block {
  margin-top: 1.5rem;
  background-color: var(--color-tag-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: inline-block;
}
.contact-email-block p {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 0.3rem;
}
.contact-email-block a {
  font-family: var(--font-ui);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(191,51,32,0.3);
}

.legal-intro {
  background-color: var(--color-tag-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}
.legal-intro p {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background-color: #111420;
  color: rgba(255,255,255,0.75);
  padding: 3.5rem 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo-text {
  font-family: var(--font-ui);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}
.footer-brand p {
  font-family: var(--font-body);
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
}
.footer-col h3 {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 0.85rem;
}
.footer-col li {
  margin-bottom: 0.45rem;
}
.footer-col a {
  font-family: var(--font-ui);
  font-size: 0.83rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
  font-weight: 500;
}
.footer-col a:hover { color: var(--color-white); }
.footer-bottom {
  padding: 1.25rem 0;
  text-align: center;
}
.footer-bottom p {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   UTILITY
   ============================================================ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.breadcrumb a, .breadcrumb span {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--color-muted);
}
.breadcrumb a { text-decoration: underline; text-decoration-color: rgba(0,0,0,0.15); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-border); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .articles-grid {
    grid-template-columns: 1fr 1fr;
  }
  .articles-grid .card:first-child {
    grid-column: span 2;
  }
  .about-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-dark);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 0.75rem 1.25rem 1rem;
    display: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    z-index: 99;
  }
  .main-nav.open { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list > li > a,
  .dropdown-btn {
    padding: 0.65rem 0.5rem;
    font-size: 0.92rem;
    border-radius: 0;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    justify-content: space-between;
  }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background-color: rgba(255,255,255,0.06);
    display: none;
    padding: 0.25rem 0;
  }
  .dropdown-menu.open { display: block; }
  .dropdown-menu li a {
    color: rgba(255,255,255,0.75);
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
  }
  .dropdown-menu li a:hover {
    background-color: rgba(255,255,255,0.08);
    color: var(--color-white);
  }

  .hero { padding: 3.5rem 0 3rem; }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid .card:first-child { grid-column: span 1; }

  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-brand { grid-column: auto; }

  .article-layout { padding: 2rem 0; }
  .content-page { padding: 2rem 0; }
  .about-values { grid-template-columns: 1fr; }
}