/* ==========================================================================
   PAURAMOS.MX - ESTILOS OFICIALES DE MARCA PERSONAL & DIVULGACIÓN CIENTÍFICA
   Identidad: Mtra. Paulina Ramos Díaz | Doctorante en Estudios Fiscales (UDG CUCEA)
   Paleta: Azul Marino Deep (#071326, #0A1931), Verde Esmeralda (#00A86B), Cían Digital (#38BDF8)
   ========================================================================== */

:root {
  --color-navy-dark: #071326;
  --color-navy-deep: #0A1931;
  --color-navy-card: #0F213E;
  --color-navy-light: #1E293B;
  --color-emerald: #00A86B;
  --color-emerald-light: #10B981;
  --color-emerald-dark: #047857;
  --color-emerald-bg: rgba(0, 168, 107, 0.12);
  --color-cyan: #38BDF8;
  --color-cyan-bright: #7DE6FF;
  --color-cyan-bg: rgba(56, 189, 248, 0.12);
  --color-bg-light: #F8FAFC;
  --color-bg-white: #FFFFFF;
  --color-text-main: #0F172A;
  --color-text-body: #334155;
  --color-text-muted: #64748B;
  --color-text-white: #FFFFFF;
  --color-text-light: #E2E8F0;
  --color-border-light: #E2E8F0;
  --color-border-dark: rgba(255, 255, 255, 0.12);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --transition: all 0.25s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-body);
  background-color: var(--color-bg-light);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--color-emerald-dark);
}

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

/* Contenedores y Grid */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container-narrow {
  max-width: 860px;
}

.section {
  padding: 5rem 0;
}

.section-dark {
  background-color: var(--color-navy-deep);
  color: var(--color-text-light);
}

.section-alt {
  background-color: #F1F5F9;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-main);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 {
  color: var(--color-text-white);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }

.section-title-wrapper {
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-emerald);
  margin-bottom: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: var(--color-emerald-bg);
  border-radius: var(--radius-full);
}

.section-dark .section-tag {
  color: var(--color-cyan-bright);
  background: rgba(56, 189, 248, 0.15);
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.section-dark .section-subtitle {
  color: var(--color-text-light);
  opacity: 0.85;
}

/* Header & Navegación */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 19, 38, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--color-text-white);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-badge {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-emerald), var(--color-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy-dark);
  font-weight: 800;
  font-size: 1.1rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.1rem;
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--color-cyan-bright);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  color: var(--color-text-light);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-cyan-bright);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-cyan);
  border-radius: var(--radius-full);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-emerald);
  color: var(--color-text-white);
  box-shadow: 0 4px 12px rgba(0, 168, 107, 0.35);
}

.btn-primary:hover {
  background: var(--color-emerald-dark);
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 168, 107, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-white);
  border-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-text-white);
  border-color: var(--color-cyan);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-emerald);
  border-color: var(--color-emerald);
}

.btn-outline:hover {
  background: var(--color-emerald);
  color: var(--color-text-white);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

/* Hero Section */
.hero {
  position: relative;
  padding: 6rem 0 7rem;
  background: radial-gradient(circle at 80% 20%, rgba(14, 75, 130, 0.4) 0%, var(--color-navy-dark) 70%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(rgba(56, 189, 248, 0.08) 1px, transparent 1px),
    radial-gradient(rgba(0, 168, 107, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 168, 107, 0.15);
  border: 1px solid var(--color-emerald);
  color: var(--color-emerald-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3rem;
  color: var(--color-text-white);
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-cyan-bright), var(--color-emerald-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  max-width: 600px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-cyan-bright);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  opacity: 0.8;
}

.hero-card {
  position: relative;
  z-index: 1;
  background: rgba(15, 33, 62, 0.7);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  text-align: center;
}

.hero-photo-wrapper {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-cyan);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.hero-card-name {
  color: var(--color-text-white);
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.hero-card-role {
  color: var(--color-emerald-light);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.hero-card-inst {
  color: var(--color-text-light);
  font-size: 0.85rem;
  opacity: 0.8;
}

/* Tarjetas & Glassmorphism */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 168, 107, 0.3);
}

.glass-card {
  background: rgba(15, 33, 62, 0.65);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 2rem;
  color: var(--color-text-light);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-cyan);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

/* Grid de Pilares de Investigación */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.pillar-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pillar-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  background: var(--color-emerald-bg);
  color: var(--color-emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.section-dark .pillar-icon {
  background: rgba(56, 189, 248, 0.15);
  color: var(--color-cyan-bright);
}

.pillar-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.pillar-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  flex-grow: 1;
}

.section-dark .pillar-desc {
  color: var(--color-text-light);
  opacity: 0.85;
}

/* Grids de Blog & Artículos */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(0, 168, 107, 0.4);
}

.article-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-navy-deep);
}

.article-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-card:hover .article-image {
  transform: scale(1.05);
}

.article-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(7, 19, 38, 0.85);
  backdrop-filter: blur(6px);
  color: var(--color-cyan-bright);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.article-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.article-title {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.article-title a {
  color: var(--color-text-main);
}

.article-title a:hover {
  color: var(--color-emerald);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-light);
}

.article-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-emerald);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.article-link:hover {
  color: var(--color-emerald-dark);
  gap: 0.6rem;
}

/* Filtros de Blog */
.blog-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-body);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--color-navy-deep);
  color: var(--color-text-white);
  border-color: var(--color-navy-deep);
}

/* Vista de Artículo Individual */
.article-header {
  padding: 5rem 0 3rem;
  background: var(--color-navy-deep);
  color: var(--color-text-white);
  text-align: center;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
  opacity: 0.8;
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--color-cyan-bright);
}

.article-header-title {
  font-size: 2.5rem;
  color: var(--color-text-white);
  max-width: 900px;
  margin: 0 auto 1.5rem;
  line-height: 1.25;
}

.article-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-light);
  flex-wrap: wrap;
}

.article-main-image {
  margin: -2rem auto 3.5rem;
  max-width: 860px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #1E293B;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-size: 1.75rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-emerald-bg);
  color: var(--color-navy-deep);
}

.article-content h3 {
  font-size: 1.35rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-navy-card);
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.callout-box {
  background: var(--color-emerald-bg);
  border-left: 4px solid var(--color-emerald);
  padding: 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
}

.callout-box p:last-child {
  margin-bottom: 0;
}

.callout-title {
  font-weight: 700;
  color: var(--color-navy-dark);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.author-bio-box {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: #F1F5F9;
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-top: 4rem;
}

.author-bio-avatar {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-emerald);
}

.author-bio-content h4 {
  margin-bottom: 0.25rem;
}

.author-bio-content p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Trayectoria & Línea de Tiempo */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2rem;
  width: 2px;
  background: var(--color-border-light);
}

.timeline-item {
  position: relative;
  padding-left: 4.5rem;
  margin-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: 1.35rem;
  top: 0.25rem;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--color-emerald);
  border: 3px solid var(--color-bg-white);
  box-shadow: 0 0 0 2px var(--color-emerald);
}

.timeline-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.timeline-year {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-emerald);
  background: var(--color-emerald-bg);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.5rem;
}

.timeline-title {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}

.timeline-inst {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Contacto & Social */
.social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.social-btn {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-btn:hover {
  background: var(--color-emerald);
  color: var(--color-text-white);
  border-color: var(--color-emerald);
  transform: translateY(-3px);
}

/* Footer */
.footer {
  background: var(--color-navy-dark);
  color: var(--color-text-light);
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: var(--color-text-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: var(--color-text-light);
  opacity: 0.75;
  font-size: 0.9rem;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--color-cyan-bright);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-light);
  opacity: 0.6;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-stats {
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 4.5rem;
    left: -100%;
    width: 100%;
    height: calc(100vh - 4.5rem);
    background: var(--color-navy-dark);
    flex-direction: column;
    padding: 2.5rem 1.5rem;
    gap: 1.5rem;
    transition: left 0.3s ease;
  }
  .nav-menu.active {
    left: 0;
  }
  .nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .article-header-title {
    font-size: 1.85rem;
  }
  .author-bio-box {
    flex-direction: column;
    text-align: center;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}