* { margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    font-family: var(--font-family); 
}

body { 
    background-color: var(--background); 
    color: var(--text); 
}

section {
    padding: 40px 8%;
    max-width: 1200px;
    margin: 0 auto;
}

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

h2 {
    color: var(--primary);
    border-left: 6px solid var(--secondary);
    padding-left: 15px;
    margin-bottom: 30px;
    font-size: var(--font-size-title);

}
    #btn-topo {
    display: none;     
    position: fixed;   
    bottom: 20px;       
    right: 20px;        
    width: 45px;        
    height: 45px;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 9999;     
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#btn-topo:hover {
    background-color: var(--primary); 
    transform: scale(1.1);
}