* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
}

/* IMAGEN SUPERIOR */
.barra-superior {
    width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: cover;
    display: block;
}

/* IMAGEN INFERIOR */
.barra-inferior {
    width: 100%;
    height: auto;
    max-height: 150px;
    object-fit: cover;
    display: block;
    margin-top: auto; /* Asegura que se quede al final del contenido */
}

/* CONTENEDOR PRINCIPAL */
.contenedor-principal {
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    margin: 20px;
    text-align: center;
}

.contenedor-principal h1 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 28px;
}

.subtitulo {
    color: #4a5568;
    font-size: 18px;
    margin-bottom: 30px;
    line-height: 1.5;
}

/* SECCIÓN DE PASOS */
.pasos {
    display: flex;
    justify-content: space-around;
    margin-bottom: 35px;
}

.paso-item {
    width: 45%;
    padding: 20px;
    background-color: #f8fafc;
    border-radius: 10px;
    color: #2d3748;
}

.paso-item h3 {
    color: #667eea;
    margin-bottom: 10px;
}

/* BOTÓN DE INICIO */
.btn-iniciar {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: bold;
    font-size: 16px;
    transition: background-color 0.3s;
}

.btn-iniciar:hover {
    background-color: #5a6edb;
}

/* FORMULARIOS */
.grupo-formulario {
    margin-bottom: 20px;
    text-align: left;
}

.grupo-formulario label {
    display: block;
    margin-bottom: 8px;
    color: #2d3748;
    font-weight: 500;
}

.grupo-formulario input {
    width: 100%;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    color: #2d3748;
}

/* ALERTAS */
.alerta {
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 20px;
    display: none;
}

.alerta-exito {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alerta-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* BOTONES DE FORMULARIOS */
button {
    width: 100%;
    padding: 15px;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: bold;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #5a6edb;
}

/* BOTÓN FLOTANTE WHATSAPP */
.btn-whatsapp {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background-color: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
    text-decoration: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: background-color 0.3s;
}

.btn-whatsapp:hover {
    background-color: #128c7e;
}