footer {
    background: var(--color-light);
    padding: 60px 10%;
    text-align: center;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--color-muted);
    border-top: 1px solid var(--color-border);
}

footer a {
    color: var(--color-text);
    transition: opacity var(--transition-fast);
}

footer a:hover {
    opacity: 0.6;
}

/* Newsletter section opcional */
.newsletter {
    background: var(--color-dark);
    color: #fff;
    padding: 80px 10%;
    text-align: center;
}

.newsletter h3 {
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 30px;
    color: #fff;
}

.newsletter input {
    padding: 16px 24px;
    border: 1px solid rgba(255,255,255,0.3);
    background: transparent;
    color: #fff;
    font-family: inherit;
    font-size: 14px;
    width: 100%;
    max-width: 350px;
    transition: border-color var(--transition-fast);
}

.newsletter input::placeholder {
    color: rgba(255,255,255,0.5);
}

.newsletter input:focus {
    outline: none;
    border-color: #fff;
}

.newsletter button {
    padding: 16px 40px;
    background: #fff;
    color: var(--color-dark);
    border: none;
    font-family: inherit;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: opacity var(--transition-fast);
    margin-left: -4px;
}

.newsletter button:hover {
    opacity: 0.9;
}

@media (max-width: 768px) {
    footer {
        font-size: 11px;
        padding: 40px 5%;
        letter-spacing: 1px;
    }
    
    .newsletter {
        padding: 50px 6%;
    }
    
    .newsletter input,
    .newsletter button {
        display: block;
        width: 100%;
        max-width: 100%;
        margin: 0 0 12px 0;
    }
}