body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #111827;
    color: white;
}
header {
    background-color: #1f2937; 
    padding: 15px;
    border-bottom: 4px solid #3b82f6; 
}

.contenido-cabecera {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

h1 {
    margin: 0;
    color: #60a5fa; 
}

.btn-salir {
    background-color: #ef4444;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

.contenedor-app {
    width: 95%; 
    margin: 20px auto;
}

.cuadricula {
    display: grid;
    grid-template-columns: 200px auto 200px; 
    grid-gap: 20px;
}

.titulo-seccion {
    text-align: center;
    color: #34d399; 
}

.tarjeta {
    background-color: #1f2937;
    border-radius: 10px;
    border: 1px solid #374151;
    padding: 20px;
    margin-bottom: 20px;
}

.borde-morado {
    border-left: 5px solid #8b5cf6; 
}

.btn-menu {
    width: 100%;
    background-color: #374151;
    color: white;
    border: none;
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 5px;
    text-align: left;
    font-weight: bold;
    cursor: pointer;
}



textarea {
    width: 95%;
    height: 60px;
    background-color: #111827;
    color: white;
    border: 1px solid #4b5563;
    border-radius: 5px;
    padding: 10px;
    font-size: 15px;
}

.btn-publicar {
    background-color: #8b5cf6; 
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    margin-top: 10px;
    float: right;
    cursor: pointer;
    font-weight: bold;
}

.cabecera-pub {
    display: flex;
    margin-bottom: 15px;
}

.foto-perfil {
    width: 40px;
    height: 40px;
    background-color: #f59e0b; 
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 40px; 
    margin-right: 10px;
    font-weight: bold;
}

.nombre-usuario {
    color: #60a5fa; 
}

.fecha {
    font-size: 12px;
    color: #9ca3af;
}

.titulo-pub {
    margin-top: 0;
    color: #f9fafb;
}

.texto-pub {
    color: #d1d5db;
}

.imagen-pub {
    width: 100%;
    border-radius: 10px;
    margin-top: 10px;
}

.titulo-modulo {
    color: #fbbf24; 
    border-bottom: 1px solid #374151;
    padding-bottom: 10px;
    margin-top: 0;
}

.modulo ul {
    list-style-type: none;
    padding: 0;
}

.modulo li {
    padding: 8px 0;
    color: #d1d5db;
    border-bottom: 1px solid #374151;
}

.caja-usuario {
    width: 300px;
    margin: 50px auto;
    text-align: center;
    background-color: #1f2937;
    padding: 30px;
    border-radius: 10px;
    border: 2px solid #3b82f6; 
}

.caja-usuario input {
    width: 90%;
    padding: 10px;
    background-color: #111827;
    color: white;
    border: 1px solid #4b5563;
    border-radius: 5px;
}
.btn-formulario {
    background-color: #3b82f6; 
    color: white;
    padding: 10px;
    width: 95%;
    border: none;
    border-radius: 5px;
    font-weight: bold;
    cursor: pointer;
}

.enlaces a {
    color: #60a5fa;
    text-decoration: none;
    display: block;
    margin-top: 15px;
}