/* ============================================
   LLAVE - Design System & Variables
   ============================================ */

:root {
  --color-primary: #0478D4;
  --color-primary-dark: #0366b3;
  --color-primary-light: #38bdf8;
  --color-accent: #FFD54A;
  --color-accent-hover: #F59E0B;
  
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F1F5F9;
  
  --color-text: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #64748B;
  --color-text-light: #94A3B8;
  
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --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, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  --font-heading: 'Cormorant Garamond', serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --color-bg: #0B132B;
  --color-bg-secondary: #0F172A;
  --color-surface: #1E293B;
  --color-surface-hover: #334155;
  --color-text: #F8FAFC;
  --color-text-secondary: #CBD5E1;
  --color-text-muted: #94A3B8;
  --color-border: #334155;
  --color-border-light: #1E293B;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* ============================================
   Reset & Base
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

body.menu-open {
  overflow: hidden;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

/* ============================================
   Utilidades
   ============================================ */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-center { text-align: center; }
.bg-light { background-color: var(--color-bg-secondary); }
.section { padding: 5rem 0; }
.text-muted { color: var(--color-text-muted); }

/* ============================================
   Botones
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 1rem;
  font-family: var(--font-body);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none !important;
}

.btn i { font-size: 1.1em; }

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #FFFFFF !important;
  box-shadow: 0 4px 6px -1px rgba(4, 120, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(4, 120, 212, 0.4);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: #0F172A;
  box-shadow: 0 4px 6px -1px rgba(255, 213, 74, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(255, 213, 74, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(4, 120, 212, 0.05);
}

.btn-outline-white {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.8);
  color: #FFFFFF;
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
}

.btn-lg { padding: 1rem 2.5rem; font-size: 1.125rem; }
.btn-sm { padding: 0.625rem 1.25rem; font-size: 0.875rem; }

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-weight: 600;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}

.btn-link:hover { gap: 0.75rem; }

/* ============================================
   Header & Navegación
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-base);
}

[data-theme="dark"] .header {
  background: rgba(11, 19, 43, 0.9);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo img {
  height: 40px;
  width: auto;
}

.logo i { font-size: 2rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* FIX: Botón en navegación desktop para que no se deforme */
.nav-links .btn-primary {
  padding: 0.625rem 1.25rem !important;
  font-size: 0.875rem !important;
  line-height: 1.4 !important;
  height: auto !important;
  min-height: auto !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.5rem !important;
  border-radius: var(--radius-xl) !important;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%) !important;
  color: #FFFFFF !important;
  box-shadow: 0 4px 6px -1px rgba(4, 120, 212, 0.3) !important;
  transition: var(--transition-base) !important;
}

.nav-links .btn-primary::after {
  display: none !important; /* Quita la línea de subrayado del botón */
}

.nav-links .btn-primary:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 10px 20px -5px rgba(4, 120, 212, 0.4) !important;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: rotate(15deg);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1002;
  transition: var(--transition-base);
}

/* Ocultar botón hamburguesa cuando el menú está abierto */
body.menu-open .mobile-menu-btn {
  opacity: 0;
  pointer-events: none;
}

/* ============================================
   MENÚ MÓVIL LATERAL (DRAWER)
   ============================================ */

.mobile-drawer {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  height: 100dvh;
  background: var(--color-bg);
  z-index: 1001;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  padding: 6rem 1.5rem 2rem;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
  flex-direction: column;
  gap: 0.5rem;
}

[data-theme="dark"] .mobile-drawer {
  background: var(--color-bg);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
}

.mobile-drawer.active {
  transform: translateX(0);
}

.mobile-drawer a {
  display: block;
  padding: 1rem 1.25rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
  border-left: 3px solid transparent;
}

.mobile-drawer a:hover {
  background: rgba(4, 120, 212, 0.08);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  padding-left: 1.5rem;
}

.mobile-drawer a.active {
  background: rgba(4, 120, 212, 0.1);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.mobile-drawer .btn-primary {
  margin-top: 1rem;
  padding: 1rem 1.5rem;
  width: 100%;
  text-align: center;
  border-left: none;
}

.mobile-drawer .btn-primary:hover {
  padding-left: 1.5rem;
}

.drawer-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #FFFFFF;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  z-index: 1002;
}

.drawer-close:hover {
  background: var(--color-primary-dark);
  transform: rotate(90deg);
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(4, 120, 212, 0.95) 0%, rgba(11, 19, 43, 0.9) 100%);
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  color: #FFFFFF;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-badge i { color: var(--color-accent); }

.hero h1 {
  color: #FFFFFF;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero .highlight {
  color: var(--color-accent);
  position: relative;
  display: inline-block;
}

.hero .highlight-alt {
  color: var(--color-primary-light);
}

.hero-text {
  font-size: 1.25rem;
  line-height: 1.7;
  opacity: 0.95;
  margin-bottom: 2.5rem;
  max-width: 700px;
}

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

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator {
  color: #FFFFFF;
  font-size: 2rem;
  animation: bounce 2s infinite;
  opacity: 0.7;
}

.scroll-indicator:hover { opacity: 1; }

/* ============================================
   Stats Section
   ============================================ */

.stats-section {
  padding: 4rem 0;
  background: var(--color-bg-secondary);
  margin-top: -4rem;
  position: relative;
  z-index: 10;
  border-radius: var(--radius-2xl);
  margin-left: 1rem;
  margin-right: 1rem;
  box-shadow: var(--shadow-xl);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 1.75rem;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

/* ============================================
   Section Headers
   ============================================ */

.section-header { margin-bottom: 3rem; }

.section-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: rgba(4, 120, 212, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.section-title { margin-bottom: 1rem; }

.section-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Values Grid
   ============================================ */

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.value-card {
  padding: 2.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: var(--transition-base);
}

.value-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.value-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 2rem;
}

.value-card h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.value-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   Projects Section
   ============================================ */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.project-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.project-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-active { background: rgba(16, 185, 129, 0.95); color: #FFFFFF; }
.badge-process { background: rgba(245, 158, 11, 0.95); color: #FFFFFF; }
.badge-finished { background: rgba(100, 116, 139, 0.95); color: #FFFFFF; }

.project-content { padding: 1.75rem; }

.project-content h3 {
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

.project-content p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.project-meta i { font-size: 1rem; }

/* ============================================
   News Section
   ============================================ */

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.news-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.news-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.news-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.375rem 0.875rem;
  background: var(--color-primary);
  color: #FFFFFF;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.news-content { padding: 1.5rem; }

.news-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.news-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.news-content h3 a:hover { color: var(--color-primary); }

.news-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #FFFFFF;
  max-width: 800px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.25rem;
  opacity: 0.95;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

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

.footer-brand .logo { margin-bottom: 1rem; }

.footer-brand p {
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.footer-address {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: var(--transition-base);
}

.social-links a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
  transform: translateY(-3px);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1.125rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-body);
  font-weight: 600;
}

.footer-links ul,
.contact-list { list-style: none; }

.footer-links li,
.contact-list li { margin-bottom: 0.75rem; }

.footer-links a,
.contact-list a {
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-links a:hover,
.contact-list a:hover { color: var(--color-primary); }

.contact-list i {
  color: var(--color-primary);
  width: 20px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ============================================
   Filtros
   ============================================ */

.filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: var(--transition-base);
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(4, 120, 212, 0.05);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(4, 120, 212, 0.3);
}

.filter-btn.active:hover {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

/* ============================================
   Animaciones
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

.animate-fade-in { animation: fadeIn 0.8s ease-out forwards; }

.animate-fade-in-up {
  opacity: 0;
  animation: fadeInUp 0.8s ease-out forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  
  .nav-links { display: none; }
  
  .mobile-drawer { display: flex; }
  
  .mobile-overlay { display: block; }
  
  .header-inner { height: 70px; }
  
  .logo { font-size: 1.5rem; }
  .logo img { height: 35px; }
  
  .theme-toggle {
    width: 38px;
    height: 38px;
  }
  
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
  .header-inner { padding: 0 1rem; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .values-grid, .projects-grid, .news-grid { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .mobile-drawer { width: 100%; max-width: 100%; }
}