body {
  background: #fff;
  color: #212427;
  font-family: Arial, sans-serif;
}
.principal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #1976d2;
  padding: 16px 40px;
  color: #fff;
}
.logo-container img {
  height: 60px;
}
.payment-container {
  flex: 1;
  text-align: center;
}
.emergency-container {
  min-width: 200px;
  text-align: right;
}

nav {
  background: #42a5f5;
}
nav ul {
  list-style: none;
  margin:0; padding:0;
  display: flex;
}
nav li {
  margin: 0;
}
nav a {
  color: #fff;
  font-weight: bold;
  display: block;
  padding: 15px 25px;
  text-decoration: none;
  transition: background 0.2s;
}
nav a:hover {
  background: #1565c0;
}
main {
  padding: 24px 16px;
}
.contenido-principal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 20px 40px;
  flex-wrap: wrap;
}

.texto-izquierda {
  flex: 1 1 45%;
  min-width: 280px;
}

.texto-izquierda h1 {
  color: #1976d2;
  margin-bottom: 0.5em;
}

.foto-derecha {
  flex: 1 1 45%;
  min-width: 280px;
  text-align: center;
}

.foto-derecha img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.3);
}
form {
  max-width: 500px;
  margin: 0 auto;
  padding: 20px;
  background: #f5faff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.2);
}

form label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: #1976d2;
}

form input[type="text"],
form input[type="email"],
form select,
form textarea {
  width: 100%;
  padding: 8px 10px;
  margin-bottom: 15px;
  border: 1px solid #c1d4f7;
  border-radius: 5px;
  font-size: 1rem;
  font-family: Arial, sans-serif;
  box-sizing: border-box;
}

form button {
  background-color: #1976d2;
  color: white;
  font-weight: bold;
  font-size: 1.1rem;
  padding: 12px 25px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s;
}

form button:hover {
  background-color: #155fa0;
}

.mensaje-exito {
  max-width: 500px;
  margin: 10px auto;
  padding: 12px 15px;
  background-color: #d6f5d6;
  border: 1px solid #aed998;
  border-radius: 8px;
  color: #356530;
  font-weight: bold;
  text-align: center;
}
.foto-derecha img {
  max-width: 300px;
  height: auto;
}
.payment-btn.destacado {
  background: linear-gradient(90deg, #d32f2f 0%, #f44336 100%);
  color: #fff;
  border-radius: 8px;
  padding: 15px 40px;
  font-size: 1.1rem;
  font-weight: bold;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(211,47,47,0.22);
  transition: background 0.2s;
  border: none;
}
.payment-btn.destacado:hover {
  background: #b71c1c;
}