/* ===================================
   BOUTONS DE NAVIGATION LEÇON
   Style moderne 2025
   =================================== */

.lesson-navigation-footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-top: 2px solid rgba(231, 125, 1, 0.2);
    padding: 1.5rem;
}

.lesson-navigation-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.lesson-nav-btn,
.lesson-mark-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lesson-nav-btn,
.btn-outline-secondary.lesson-nav-btn,
a.btn-outline-secondary.lesson-nav-btn {
    background: linear-gradient(135deg, #E77D01 0%, #FF8C00 100%) !important;
    border: 2px solid transparent !important;
    color: #ffffff !important;
    box-shadow: 0 4px 15px rgba(231, 125, 1, 0.3) !important;
}

.lesson-nav-btn:hover,
.btn-outline-secondary.lesson-nav-btn:hover,
a.btn-outline-secondary.lesson-nav-btn:hover,
.lesson-nav-btn:focus,
.btn-outline-secondary.lesson-nav-btn:focus,
a.btn-outline-secondary.lesson-nav-btn:focus {
    background: linear-gradient(135deg, #E77D01 0%, #FF8C00 100%) !important;
    border: 2px solid transparent !important;
    color: #ffffff !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 125, 1, 0.4) !important;
}

.lesson-nav-btn:disabled,
.btn-outline-secondary.lesson-nav-btn:disabled,
a.btn-outline-secondary.lesson-nav-btn:disabled,
.lesson-nav-btn.disabled,
.btn-outline-secondary.lesson-nav-btn.disabled,
a.btn-outline-secondary.lesson-nav-btn.disabled {
    opacity: 0.3 !important;
    cursor: not-allowed;
    transform: none;
}

.lesson-nav-btn:disabled:hover,
.btn-outline-secondary.lesson-nav-btn:disabled:hover,
a.btn-outline-secondary.lesson-nav-btn:disabled:hover,
.lesson-nav-btn.disabled:hover,
.btn-outline-secondary.lesson-nav-btn.disabled:hover,
a.btn-outline-secondary.lesson-nav-btn.disabled:hover {
    background: linear-gradient(135deg, #E77D01 0%, #FF8C00 100%) !important;
    border: 2px solid transparent !important;
    color: #ffffff !important;
    box-shadow: none !important;
}

.lesson-nav-btn .material-icons {
    font-size: 1.25rem;
}

/* Bouton Marquer comme lu */
.lesson-mark-btn {
    background: linear-gradient(135deg, #00D084 0%, #00A86B 100%);
    border: 2px solid #00D084;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 208, 132, 0.3);
    flex: 1;
    max-width: 300px;
    justify-content: center;
}

.lesson-mark-btn:hover {
    background: linear-gradient(135deg, #00A86B 0%, #00D084 100%);
    border-color: #00D084;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 208, 132, 0.4);
}

.lesson-mark-btn .material-icons {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.lesson-mark-btn:hover .material-icons {
    transform: scale(1.1);
}

/* État complété */
.lesson-mark-btn.completed {
    background: linear-gradient(135deg, rgba(0, 208, 132, 0.4) 0%, rgba(0, 168, 107, 0.4) 100%);
    border: 2px solid rgba(0, 208, 132, 0.6);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 208, 132, 0.2);
    opacity: 0.85;
}

.lesson-mark-btn.completed:hover {
    background: linear-gradient(135deg, rgba(0, 168, 107, 0.5) 0%, rgba(0, 208, 132, 0.5) 100%);
    border-color: rgba(0, 208, 132, 0.7);
    box-shadow: 0 6px 20px rgba(0, 208, 132, 0.3);
    opacity: 0.9;
}

.lesson-mark-btn.completed .material-icons {
    animation: completePulse 0.6s ease-out;
}

@keyframes completePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

/* Loading state */
.lesson-mark-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.lesson-mark-btn.loading .material-icons {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .lesson-navigation-buttons {
        flex-direction: column;
    }
    
    .lesson-nav-btn,
    .lesson-mark-btn {
        width: 100%;
        max-width: none;
        justify-content: center;
    }
    
    .lesson-navigation-buttons {
        gap: 0.75rem;
    }
}

@media (max-width: 576px) {
    .lesson-nav-btn span:not(.material-icons),
    .lesson-mark-btn span:not(.material-icons) {
        font-size: 0.85rem;
    }
    
    .lesson-nav-btn,
    .lesson-mark-btn {
        padding: 0.6rem 1rem;
    }
}