.dashboard-container {
    display: flex;
    min-height: calc(100vh - 120px);
}

.sidebar {
    width: 280px;
    background-color: #f8f9fa;
    border-right: 1px solid #dee2e6;
    padding: 20px 0;
}

.content {
    flex: 1;
    padding: 20px;
    background-color: #ffffff;
}

.nav-link {
    color: #333;
    border-radius: 0;
    padding: 12px 20px;
    margin-bottom: 5px;
}

.nav-link:hover {
    background-color: rgba(111, 66, 193, 0.1);
}

.nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-link i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.user-info, .teacher-info {
    padding: 15px;
    margin-bottom: 20px;
    border-bottom: 1px solid #dee2e6;
}

.audio-card {
    transition: transform 0.3s, box-shadow 0.3s;
}

.audio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card-title {
    color: var(--primary-color);
    font-weight: bold;
}

.test-card {
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.test-header {
    background-color: var(--primary-color);
    color: white;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    padding: 15px 20px;
}