/* footer.css */
.lesson-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px; 
    background: white;
    border-top: 2px solid var(--duo-gray);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.footer-content {
    max-width: 1200px; 
    width: 100%;
    margin: 0 auto;
    padding: 0 25px;
    display: grid; 
    grid-template-columns: 1fr 3fr 1fr; 
    align-items: center;
}

.nav-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.btn-check {
    padding: 12px 20px;
    border-radius: 12px;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    text-transform: uppercase;
}

.nav-buttons button:first-child {
    background-color: var(--duo-blue);
    color: white;
    border: none;
    border-bottom: 4px solid var(--duo-blue-border);
}

.nav-buttons button:first-child:hover {
    filter: brightness(1.1);
}

.nav-buttons button:first-child:active {
    border-bottom: 0;
    transform: translateY(2px);
}

.nav-buttons .btn-check[style*="background: none"] {
    border: 2px solid transparent !important;
    color: #afafaf !important;
}

.nav-buttons .btn-check[style*="background: none"]:hover {
    background-color: var(--duo-gray) !important;
    color: var(--duo-text) !important;
}

.lang-nav {
    display: flex;
    justify-content: flex-end;
}

.copyright {
    color: #afafaf;
    font-size: 13px;
    font-weight: bold;
    white-space: nowrap;
}

@media (max-width: 1050px) {
    .footer-content { grid-template-columns: 1fr 2fr; }
    .copyright { display: none; }
}

@media (max-width: 768px) {
    .lesson-footer { height: auto; padding: 15px 0; }
    .footer-content { display: flex; flex-direction: column; gap: 15px; }
    .nav-buttons { flex-wrap: wrap; justify-content: center; }
}