:root {
  --azul-negraceo: #1A1F36;
  --rojo-berna: #B22222;
  --blanco: #ffffff;
  --gris-claro: #f4f4f4;
}

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

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, var(--azul-negraceo) 0%, #2a2f4a 100%);
  color: var(--blanco);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.container {
  max-width: 500px;
  width: 100%;
  background-color: #2a2f4a;
  padding: 3rem 2.5rem;
  border-radius: 15px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background-color: var(--rojo-berna);
}

.logo {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 0 10px rgba(178, 34, 34, 0.5));
}

h1 {
  font-family: 'Oswald', sans-serif;
  font-size: 2.2rem;
  color: var(--blanco);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

h1 strong {
  color: var(--rojo-berna);
}

.intro-text {
  font-size: 1.3rem;
  margin-bottom: 2.5rem;
  line-height: 1.5;
  opacity: 0.95;
}

.btn-group {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.whatsapp-btn {
  display: block;
  background-color: #25D366;
  color: var(--blanco);
  padding: 1.2rem 2rem;
  text-decoration: none;
  border-radius: 10px;
  font-weight: bold;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 10px 25px rgba(37, 211, 102, 0.3);
  position: relative;
  overflow: hidden;
}

.whatsapp-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.whatsapp-btn:hover::before {
  left: 100%;
}

.whatsapp-btn:hover {
  background-color: #20b858;
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(37, 211, 102, 0.4);
}

.whatsapp-text {
  display: block;
  margin-bottom: 0.3rem;
}

.whatsapp-phone {
  font-size: 1rem;
  opacity: 0.9;
}

.home-btn {
  display: inline-block;
  background-color: var(--rojo-berna);
  color: var(--blanco);
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: 10px;
  font-weight: bold;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.home-btn:hover {
  background-color: transparent;
  color: var(--rojo-berna);
  border-color: var(--rojo-berna);
  transform: translateY(-2px);
}

.security-text {
  background-color: rgba(178, 34, 34, 0.1);
  border: 1px solid rgba(178, 34, 34, 0.2);
  padding: 1.5rem;
  border-radius: 10px;
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.6;
}

.security-text strong {
  color: var(--rojo-berna);
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.feature {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  border-left: 4px solid var(--rojo-berna);
  transition: all 0.3s ease;
}

.feature:hover {
  background-color: rgba(178, 34, 34, 0.1);
  transform: translateX(5px);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    margin: 1rem;
    padding: 2rem 1.5rem;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .intro-text {
    font-size: 1.1rem;
  }
  
  .logo {
    font-size: 3.2rem;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 360px) {
  .whatsapp-btn, .home-btn {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
}